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HomeMy WebLinkAboutLUA99-088 Golder Associates Inc. CialGolder 18300 NE Union Hill Road,Suite 200 • Redmond,WA 98052-3333 Associates Telephone(425)883-0777 Fax(425)882-5498 O�ELOP,ME SUBSURFACE INVESTIGATION AND CITY OF RENTON FOR THE HIGATE SEWER PROJECT FER 0 Q 2000 RENTON,WASHINGTON RECEIVED Prepared for: City of Renton planning/Building/Public Works Department 1055 South Grady Way Renton,Washington 98055 Submitted by: • • p,FiD D. 40 Golder Associates Inc. \C' of WAS&��'19 18300 NE Union Hill Road,Suite 200 Qy��` ti oo 4.4 Redmond,Washington 98052 w ,• • SIONALI NIPAA l`. s /G —/3 -O/ - o r Shawn L.McNamara Richard D.Luark,P.E. Staff Geological Engineer Associate Engineer January 12,2000 993-1606.300 0112rd11 Aoc -ccir-Gc IN Al ISTRAI IA C:ANADA.GERMANY•HUNGARY,ITALY,SWEDEN,UNITED KINGDOM,UNITED STATES f January 12,2000 i 993-1606.300 TABLE OF CONTENTS Page No. 1. INTRODUCTION 1 1.1 Purpose and Scope of Services 1 1.2 Project and Site Description 1 2. GEOTECHNICAL INVESTIGATIONS 3 2.1 Field Investigations 3 2.2 Laboratory Testing 3 3. SUBSURFACE CONDITIONS 4 3.1 General 4 3.2 Geologic Setting 4 3.3 Soil 4 3.4 Groundwater 6 4. ENGINEERING RECOMMENDATIONS 7 4.1 General 7 4.2 Trenched Excavations 7 4.3 Trenchless Excavations 7 4.4 Liquefaction 8 4.5 Trench Backfill Materials 9 4.5.1 Reuse of Construction Spoils 9 4.5.2 Subgrade Preparation 9 4.5.3 Pipe Bedding 9 4.5.4 General Trench Backfill 9 4.6 Post-Construction Settlements and Construction Observation 10 5. CONSTRUCTION CONSIDERATIONS 11 5.1 Temporary Construction Surfaces 11 5.2 Dewatering 11 5.3 Erosion Control 11 5.4 Restoration 12 6. USE OF THIS REPORT 13 LIST OF FIGURES Figure 1 Site Location Map Figure 2 Site and Exploration Plan LIST OF APPENDICES Appendix A Boring Logs Appendix B Laboratory Testing Golder Associates , January 12,2000 1 993-1606.300 1. INTRODUCTION 1.1 Purpose and Scope of Services The City of Renton retained Golder Associates Inc. (Golder) to provide geotechnical consulting services for the proposed sewer line,located in North Renton,east of 405 near the Kennydale Hill area(Figure 1). The purpose of the activities described in this report was to characterize the subsurface geologic conditions,provide general geotechnical conclusions and recommendations and guidelines related to the construction of the sewer line including trenches technology recommendations,and criteria for restoration of the disturbed areas. Golder's geotechnical work activities consisted of subsurface and engineering analyses, performed in accordance with our proposal dated August 5,1999. This report presents the results of the field investigations and provides geotechnical design criteria for the project. 1.2 Project and Site Description We understand that the City of Renton is planning a new 8-inch-diameter sanitary sewer line in a residential area of North Renton. The new line would allow elimination of an existing pump station and force main. The sewer line would run from an existing MH at Jones Ave NE,due east across a vegetated utility easement and drainage ditch, then due south to NE 20m Street,and west up 20th street about 23 feet to an existing MH. The total length of each segment is summarized below. Segment Length (ftl East-West from Jones Ave. 409 South to NE 20th St. 612 NE 20th St. 23 TOTAL LENGTH 1,044 The proposed sewer project is located in North Renton,east of 405 near the Kennydale Hill area. The sewer line is divided into three segments as indicated above. East-West From Jones Avenue This section of the sewer alignment runs from station 1+00 to 5+00. From station 1+00 to 2+00 the line travels east underneath Jones Ave NE into an undeveloped lot with minimal grass and weed cover before hitting a series of trees near 2+00. Just beyond the trees at the back of the undeveloped lot the line crosses under a drainage ditch near station 3+00. From station 3+00 to 5+00 the line travels through a sparsely wooded area covered with blackberry bushes. At station 5+00 the line makes a 90-degree turn south. Golder Associates � r January 12,2000 2 993-1606.300 There is little to no topographic relief between station 1+00 and 3+00 except for the sharp drop into the drainage ditch. From station 3+00 to 5+00 there is approximately 10 feet change in elevation as the site slopes up to the east. The soil cover above the sewer line between station 1+00 and 5+00 varies from approximately 3 to 14 feet respectively. South to NE 20th Street This section of the alignment runs from station 5+00 to 11+00. From station 5+00 to 6+00 the line travels south under a thick cover of blackberry bushes. Within the blackberry bushes there are remains of 2 old cars and a camper from the residence nearby. From station 6+00 to 7+00 the line continues south beneath the cover of thick blackberry bushes and beneath the remains of an old decaying barn. From station 7+00 to 8+00 the line passes beneath an increasing thickness of blackberry bushes and alongside the residence at 3201 NE 20th Street. It is also at this point that the soils directly at the surface become increasingly soft and the depth to groundwater is • significantly decreasing(wetlands). From station 8+00 to 10+00 the line passes beneath several blackberry bushes rooted within the wetlands. The groundwater table in this area is extremely high and the soil is almost too soft for foot travel. From 10+00 to 11+00 the line passes along side the residence located at 3202 NE 20th Street and into a manhole in the middle of NE 20th Street. The blackberry bushes are not present in this area. There is a row of poplars running parallel to the line up to NE 20th Street. The site slopes gently downward to the south along the line between stations 5+00 and 11+00 with a topographic relief of approximately 5 feet. The soil cover above the proposed sewer line,between station 5+00 and 11+00,varies from approximately 14 to 4 feet respectively. NE 20th Street From the manhole in the middle of NE 20th Street the line continues 23 feet to the west underneath NE 20th Street to an existing manhole. NE 20th Street rises steadily to the east toward the existing manhole with a topographic relief of approximately 0.28 feet. The soil cover above the 23-foot run down NE 20th Street is approximately 5.5 feet. Golder Associates f January 12,2000 3 993-1606.300 2. GEOTECHNICAL INVESTIGATIONS 2.1 Field Investigations Field investigations including six test borings (BH-1,BH-2,BH-3,BH-4,BH-5,and BH-6) were conducted on October 4, 1999. The exploration locations are shown on Figure 2. Golder's test borings were drilled with a convertible trailer mounted/skid mounted,B-24 drill rig. In order to complete borings within the wetland area the rig was taken off the trailer and pulled to the drilling locations by a dozer. Boretech provided the drill rig and crew,while the dozer was provided by Northwest Excavating,both under subcontract to Golder Associates. Drilling and sampling of soils were performed in accordance with Golder Technical Procedure TP-1.2-5,"Drilling,Sampling,and Logging of Soils". Standard Penetration Tests (SPT)were performed at 5-foot intervals using a standard two-inch diameter split spoon sampler driven by a 140-pound hammer falling a distance of 30 inches,in accordance with ASTM D-1586. A Golder field geologist examined and logged the soil from the borings and recorded the groundwater conditions. The soil samples were classified in accordance with Golder Technical Procedure TP-1.2-6,"Field Identification of Soil",which is summarized on the Soil Description Index in Appendix A. All samples were placed in plastic jars and returned to our Redmond,Washington,laboratory for further classification and testing. At the completion of drilling,all of the borings were backfillled with bentonite chips and cuttings to just below the ground surface. 2.2 Laboratory Testing Geotechnical laboratory index testing was performed on selected samples from the borings. Testing consisted of grain size and moisture. Detailed test results are presented in Appendix B and on the boring logs. Golder Associates January 12,2000 4 993-1606.300 3. SUBSURFACE CONDITIONS 3.1 General The summary boring logs are presented in Appendix A. Pertinent information including depths,stratigraphy,soil engineering characteristics,and groundwater occurrence were recorded and summarized. The stratigraphic contacts indicated on the summary logs represent the approximate boundaries between soil types. It should be noted that soil conditions are accurate only at the location of drilling and may vary between boreholes. 3.2 Geologic Setting The project is located in the vicinity of the eastern shore of Lake Washington in the Puget Sound region of Washington State. The recent geologic history of Puget Sound was dominated by the influence of glaciers. Nearly the entire Puget lowland is covered by deposits from the Pleistocene Glaciers,the most recent of which receded approximately 13,500 years ago. The most recent glaciation,named the Vashon, deposited soil units consisting of lacustrine silts and clays,advance outwash sand,till and recessional outwash. These deposits,and the weathered soils derived from them, make up nearly all of the near-surface soils on the slopes and higher elevations around Lake Washington. The project area is dominated by two of these glacial deposits, recessional outwash sand and till,with smaller amounts of peat and man-placed fills. 3.3 Soil Based on the soil conditions encountered in the borings,the stratigraphy is quite variable across the site. In general,the site appears to be underlain by layer of loose to very dense fill or in some locations peat,overlying deposits of loose to compact fine to coarse recessional outwash and very dense glacial till. Soil units encountered in our borings are summarized below: • FILL: Approximately 2.5 feet of fill was encountered in BH-2,3 feet in BH-3,and 8.0 feet in BH-6. The fill observed in BH-2 and BH-3 was loose silty sand with trace gravel and organics. This fill was most likely imported in the mid 1900s when the site was reported to be used as a horse pasture. The fill observed in BH-6 was a loose to compact silty sand with trace gravel and organics with significant mottling and iron staining. Since BH-6 is located in the shoulder of Jones Avenue,this fill can most likely be attributed to a regrade or filling in of a drainage ditch when the road was put in. • PEAT: Approximately 3 feet of peat was encountered in BH-4 and 3.5 feet in BH-5. In our borings the peat was generally soft,organic,fibrous,clayey silt, with roots and wood fragments. The peat does not seem to be continuous across the alignment. It was found only within the wetland area from station 7+00 to 11+00. Golder Associates January 12,2000 5 993-1606.300 • RECESSIONAL OUTWASH: Recessional outwash is a fluvial deposit laid down by meltwater from a stagnating or retreating glacier. In our borings the recessional outwash was generally a loose to compact,fine to coarse sand with trace to some silt. The recessional outwash was encountered in BH-1 from the surface to 16 feet. The recessional outwash was encountered in BH-2 below the upper fill from 2.5 to 8 feet. The recessional outwash was encountered in BH-3 below the upper fill from 3 feet to the end of the boring at 14 feet. The recessional outwash was encountered in BH-4 below the upper peat from 3 to 11 feet. The recessional outwash was encountered in BH-5 below the upper peat from 3.5 feet to the end of the boring at 14 feet. The recessional outwash was encountered in BH-6 below the upper fill from 8 feet to the end of the boring at 14 feet. Recessional outwash will likely be encountered at the proposed pipeline elevation intermittently from about 1+00 to 5+00,and consistently from about 5+00 to the end of the alignment at 11+00. We encountered groundwater in this unit above the proposed pipeline elevations in BH-3,BH-4,BH-5,and BH-6. • TILL: Till is an unsorted,nonstratified,homogeneous mixture of gravel,sand, silt and clay deposited beneath,or adjacent to a glacier. In this region,it is typically dense to very dense due to past consolidation by the weight of thick overlying glacial ice. In our borings the till was generally a very dense,silty fine to coarse sand with little to some gravels. Although not encountered in our borings,till commonly contains cobbles and boulders. In addition,till occasionally contains discontinuous lenses of sand which commonly hold water. These lenses can initially produce moderate groundwater flow when intercepted,but the flow typically decreases rapidly with time as the water is drained from the sand lens. The glacial till was encountered in BH-1 below the recessional outwash from 16 feet to the end of the boring at 19 feet. The glacial till was encountered in BH-2 below the recessional outwash from 8 feet to the end of the boring at 14 feet. The glacial till was encountered in BH-4 below the recessional outwash from 11 feet to the end of the boring at 14 feet. Since these borings were terminated in the till,the total thickness was unknown but the till appears to be continuous along the alignment. Although the glacial till was not encountered in BH-3,BH-5,and BH-6,the contact between the recessional outwash and the till varies in depth across the site indicating that the till most likely would have been encountered if the borings had been deeper. Glacial till will likely be encountered at the proposed pipeline elevation intermittently from about station 4+00 to station 5+00. We encountered groundwater in this unit above the proposed pipeline elevations in BH-1 and BH-2. Golder Associates January 12,2000 6 993-1606.300 3.4 Groundwater Groundwater was encountered at the time of drilling(ATD) and in the borings as follows: • Boring BH-1 at a depth of 8 feet below the surface (ATD). • Boring BH-2 at a depth of 3 feet below the surface (ATD). • Boring BH-3 at a depth of 2.5 feet below the surface (ATD). Boring BH-4 at a depth of 1 foot below the surface. This area was very wet and soft at the surface. • Boring BH-5 at a depth of 1.5 feet below the surface(ATD). Even though this boring was located adjacent to the road (NE 20th Street),this area was very wet at the surface. • Boring BH-6 at a depth of 4.5 feet below the surface (ATD). The water table encountered was interpreted to be perched on top of the relatively impermeable glacial till that was found in our borings or inferred below the recessional sand layer. Since the water levels were measured during drilling,the actual water table may be slightly different,and could vary seasonally. In particular,the water table may be doser to the ground surface during the winter and early spring. Between station 7+00 to 11+00,the water table is likely above the existing ground surface during the winter and early spring. Golder Associates January 12,2000 7 993-1606.300 4. ENGINEERING RECOMMENDATIONS 4.1 General Based on our subsurface explorations,the proposed project appears feasible from a geotechnical standpoint. The bottom of the sewer trench excavation as proposed is expected to be located in either loose to compact recessional outwash sands or dense-to- very-dense glacial till. Based on the preliminary plans provided to Golder,trenchless technology is proposed to advance the sewer line between stations 2+35 to 2+70,as a small drainage ditch/stream is located at about station 2+55. The main geotechnical issues at this site pertain to a high groundwater table combined with loose/soft soils. Temporary dewatering will be required during construction of the sewer line. Also,due to the soft ground conditions,a working surface will be required to support construction traffic. 4.2 Trenched Excavations Provided temporary dewatering of the saturated recessional sands is accomplished,it is our opinion that the entire sewer line can be installed using standard trench-box excavations. Due to the soft nature of the ground surface,a working surface will be required to support construction traffic,as outlined in the construction section of this report. The excavation ahead of the trench box should be limited to the minimum necessary to complete the work and backfilling should follow immediately behind the box. Due to the presence of loose to compact recessional sands,combined with a high water table,sloughing,overbreak and raveling of the trench sidewalls should be anticipated. The contractor should be responsible for dewatering of groundwater to control sidewall sloughing,heave of the bottom of the trench and to maintain a dry excavation. Dewatering design criteria are contained in Section 5.2 of this report. 4.3 Trenchless Excavations In order to minimize disturbance of the small stream at station 2+50,trenchless methods may be used. Based on the size of the proposed sewer line,the most suitable methods for installation of this sewer may include horizontal bores with steel-liner jacking and microturmeling. Although trenchless methods offer distinct advantages in terms of minimizing disruption to the stream/drainage ditch,disturbance greater than trenching should be anticipated in the vicinity of the jacking and operating pits. Steel liner jacking is likely the most cost-effective method for installing the sewer beneath the stream. Due to the high groundwater table and loose nature of the recessional sands,combined with a fairly shallow invert,microtunneling appears to be marginal at this site. Special drilling construction procedures and drilling muds would likely be required if Golder Associates January 12,2000 8 993-1606.300 microtunneling is attempted. The only advantage of trenchless installation of the sewer line is minimizing the disturbance to the wetlands present at the site. However,in the proposed alignment,manholes are spaced at approximately 400 feet,and installation would require disturbance to the wetlands for installation of the manholes. The manholes would provide logical locations for operating pits for either jacking or microtunneling. Based on our explorations completed for this study,glacial till will likely be encountered at the proposed pipeline elevation intermittently from about station 4+00 to station 5+00. Encountering till could negatively impact tunneling or jacking in two ways: 1. Boulders that may be present in the till could provide construction problems, ranging from slowed production to borehole obstruction. 2. The change in hardness at a geologic contact(loose,saturated recessional sands/very dense glacial till)may tend to deflect the auger or tunneling machine from its intended alignment. If trenchless excavation methods are used,bids should include contingencies for encountering boulders in the glacial till. We would expect groundwater to be encountered above the pipe invert elevation over the entire alignment. Within the saturated recessional sand,some ground loss may occur if good microtunneling construction practices are not followed or if liners are not jacked in advance or concurrently with the excavation face. The contractor should be responsible for control of settlement and in particular for ensuring that any settlements that occur do not affect adjacent utilities. Some form of drop shaft will need to be excavated in order to construct the manholes and to provide a staging area for microtunneling equipment. At locations where a staging area for tunneling is required,the likely minimum diameter of the drop shaft will probably be about 12 feet. The contractor should anticipate that dewatering would be required over the majority of the alignment. We expect that active dewatering measures (e.g.,wellpoints)may be necessary to dewater the excavation. 4.4 Liquefaction Loose to compact granular soils below the water table can liquefy during a seismic event,causing damage to utilities buried in such soils due to lateral spreading and ground settlement. The pipe and base of the manholes will be below the permanent water table over much of the alignment. The borings indicate that loose to compact sands will be present below the proposed pipe invert,except around stations 3+00 to 4+00,where our boring at station 3+50 encountered glacial till slightly above the pipe invert. During the design earthquake event(7.5 magnitude),the saturated recessional sands are considered susceptible to liquefaction. The consequences of liquefaction are that the pipeline may displace or float during liquefaction. Liquefaction can be mitigated. However,the associated cost is typically greater than replacement for a sewer line of this size. Gelder Associates January 12,2000 9 993-1606.300 4.5 Trench Backfill Materials 4.5.1 Reuse of Construction Spoils In general,the outwash sands excavation spoils can be reused as trench backfill. However,materials with high silt contents (i.e.,tills and the fill materials),typically can only be used for trench backfill during the drier summer month when the moisture can be controlled. The organic materials (i.e.,peats),should not be used for trench backfill. 4.5.2 Subgrade Preparation In general,provided that the site is properly dewatered,we would expect that the undisturbed native site soils will provide adequate subgrade support. Loosened or disturbed material should be removed from the trench bottom prior to the placement of the pipe bedding material. Areas which contain loose or soft materials at the pipe or manhole invert should be over-excavated and replaced with crushed rock or other suitable fill material. 4.5.3 Pipe Bedding Pipe bedding material should be placed beneath the pipe and within the pipe zone in accordance with"Pipe Bedding for Sanitary Sewers"as adopted by the City of Renton. Bedding above and below the pipe should be hand tamped with several passes of a vibrating plate compactor. Bedding material beneath the haunch should be hand tamped by stabbing the bedding with a shovel to provide adequate pipe support. 4.5.4 General Trench Backfill The general trench backfill placed above the pipe zone should consist of material free of organic debris and other deleterious material. The general trench backfill material should be placed in loose lifts not greater than eight inches thick and compacted to at least 95% of the maximum modified Proctor dry density(ASTM D 1557)for the upper three feet below pavement areas. The remainder of the trench backfill should be compacted to 90% of the maximum modified Proctor dry density(ASTM D 1557). Heavy compaction equipment should not be used until at least two feet of material has been placed above the crown of the pipe. Backfill materials within two feet of the crown should be compacted with light,hand-operated compaction equipment. Alternatively controlled-density fill(CDF)could be used in place of granular backfill. Golder Associates January 12,2000 10 993-1606.300 4.6 Post-Construction Settlements and Construction Observation For the proposed pipeline alignment and invert elevations,we estimate that the total post-construction settlements after the pipe placement will be negligible provided that construction is adequately monitored and the subgrade and backfill placement recommendations in this report are followed. Therefore,we recommend full time monitoring of the backfill placement operations in order to verify proper subgrade preparation and compaction of backfill. Golder Associates January 12,2000 11 993-1606.300 5. CONSTRUCTION CONSIDERATIONS 5.1 Temporary Construction Surfaces Over much of the alignment and particularly between stations 7+00 to 11+00,the ground surface is soft and wet,and will not support construction equipment. Therefore, we recommend that a temporary working surface be provided to allow for construction access. Within the wetland areas,this surface should be removed to allow for restoration. Temporary working surfaces consisting of wood chips or wood spalls (bark that is removed from logs prior to milling) can be used to provide the temporary working surface. Between stations 7+00 to 11+00,a reinforcing geogrid or geotextile may be required between the temporary working surface and the existing ground surface. The reinforcement should be laid in two strips,one on each side of the proposed trench excavation. Alternatively,steel sheets laid on the ground in the wetland areas could also provide a working surface for the construction equipment. Based on recent experience with PSE (Puget Sound Energy),the use of steel sheets as a working surface over soft ground were found to be more effective than other methods. 5.2 Dewatering The contractor should be responsible for dewatering of groundwater to control heave and maintain a dry excavation. The dewatering system should be sufficient to remove groundwater below the bottom of the trench,so that the subgrade is not disturbed and so that it remains firm under the feet of the workmen. We expect that active dewatering may be necessary over the majority of the alignment. An active dewatering system, such as a series of wells or well points appear feasible to dewater the site. We recommend that the groundwater table be lowered to at least 3 feet below the bottom of the trench. Detailed dewatering design criteria was beyond the scope of this report, however, typical hydraulic conductivities of recessional sands in the Puget Sound Region range from 1 x 10"2 cmis to 1 x 104 cm/s. Based on the grain size analyses performed on the recessional sands (the results are contained in Appendix B),we recommend that a hydraulic conductivity on the order of 1 x 10"3 cm/s be used for preliminary design of the dewatering system and estimation of pumping rates. We recommend that the contract documents be structured such that design of the dewatering system is the Contractors responsibility. If the water pumped from the dewatering system is discharged into a natural drainage course,a permit will likely be required by the WSDOE. Alternatively, the water could be discharged into the storm or sewer system 5.3 Erosion Control Prior to and during construction,we recommend that an erosion and sediment control system be installed and maintained to prevent transport of sediment into the wetlands and drainage ditches. To minimize sediment and site disturbance,we recommend that the construction be performed during the dry season. We recommend that the erosion Golder Associates January 12,2000 12 993-1606.300 and sediment control system be designed in accordance with Appendix D—Erosion and Sediment Control Standards,King County,Washington,Surface Water Design Manual, or other appropriate reference. 5.4 Restoration Construction of the pipeline and manhole will involve removal of vegetation and placement of temporary/permanent fills. Within the wetland areas and wetland buffers, we anticipate that temporary construction surfaces will be required to allow for support of construction traffic. Within the wetland areas,we anticipate that removal of the temporary construction surface will be required and that the disturbed areas are replanted. We recommend that the King County Surface Water Design Manual be consulted to determine the seed mix and plants that are appropriate for replanting the wetlands that have been disturbed. Specifically,Table 6.3.1.D (page 6-45)list plants tolerant of frequent saturated soil conditions or standing water. If possible,within the wetland areas,we recommend that the ground surface be restored to the preconstruction grades. This is to insure that the surface water and groundwater flow regime will be the same as the preconstruction conditions. Golder Associates January 12,2000 13 993-1606.300 6. USE OF THIS REPORT This report has been prepared exclusively for the use of The City of Renton and their consultants for specific application to this project. This report pertains only to the project design plans that were provided to Golder,showing the proposed location of the pipeline alignment and manhole locations. We recommend that Golder be allowed to review the final project documents to evaluate conformance and implementation of our geotechnical recommendations. Additional explorations and site evaluation may be needed if significant design changes are made. Our exploration was performed in general accordance with locally accepted geotechnical engineering practice to provide information for the area explored. There are possible variations in the subsurface conditions between the exploration areas and in the groundwater conditions with time. We recommend that a contingency for unanticipated conditions be included in the construction schedule and budget. Further we recommend our firm be retained to provide consulting services during construction to confirm the conditions indicated by the explorations and/or provide corrective recommendations adapted to the conditions revealed during the work. 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O SAallP �� yy': 4a'<, i� et �F�" ;titz5� r�r,A'$ 4 � �.��, t z 1� 13;t fij t`5.j �{ ! w i; i k.s.iuv� l , ur�t4 d� �E _ Z 7 1Y a e J�4 t; A x 'l S � a+ � ,a ( r 11 ty A 4� py o safia T+ / �`3 7d 1 `# r��''��ya��+3k E} yx� ti 1},,., j�T,�r��.� A i + 8 1.�L F o .�. I fflyaxx T.C(qq1. ll 1r1 4`t�1 �wr`{ U y 5, �.q� x 1-• cc SI = 'r• J ' y a+'fi c •K•.+'T}�ct+4tta +t1 � t y 1- r` a YuG��0 Vf Z e r V'al l� kirya4X �yA • •1•S .._ < t�;��?,,,fS i' O�nrx�`�'��Sg' f K r o i'�j 3s.s y'�fl.�t�Y •>x_�xk`' i�l'�' 3 § S i a,v fr • a Y�.'l4 1 1r.,:,try i• }"it<.' r r fi 1,8 'D AVE SE .� id,s,3���k� �Y4.,k, • 'S�yrkt `vs � y x•x��,�r�l� c� i N j''�o. Y co o b r 5 4�,,� ) `Y B D A O S= .. lyf�q xvFr �r,rr+i7n t'E1 a Y i t SM �1 •r .'Jv ivy. * ,,�s 1n } " yF ,,x4 3��14� L vt w 8' 1ST AVE . 81ST SE i4 #Y es r��7yKirt k v v l;,%'"n p' _ J J: i 5s..�g,d1 s n o f+r.. $' H PL•E v._l�sr'1+ ,�, zYa .�f, °`a'�+r r ,�y `'a� j 1 Z �.3hd Hl�. N AVE Sy S at .ref,;• h � :, �0.4.11 +,1{f t� +�"i t��4 t, ,0'"'�I lir 79'H AV: U y�q?:vtx, r tgLi?e w�i ?H��"S� ,!r ,' x .� j.i� r < x ,,Y �� 1- w E H at''#' tiy. v` trb••Vi -4 sy t*".k4 y s� n ;6� c` ' AVE S g ZQ coN m IL-.I CC 111 ca 0.3 •0 D �Zcwn N w H< Q Q= L CC� O Z 0 a° ( e%Z w_ cll 35(0N G LL tt SYE 1OY2U "L O MN!ANN30 1)0 } Sl Y6i 7• "Al:0Y10 a9Yt.J'i11LG:<,.wawa. w U ,A11Y1S.3,1i.1 75,3• I ON 1 093 33bia nrt;1Yrt11 4:0J1:1113NI 13JN•4v 01 Of.301V1 VIM owl!F3 i. . 1 I(.(I)C:r-Z K13JI la 11.0'14M11 S31 13.34,S r!l i :11InT,,M 3E'I'Y:IC NVOM SIN1 'i WJI'C37'W I `IXV34103.,5 33S um,'.l•Y 131Cr JP NCAJ3S431111 lY • NV.}I'd C,e 1Y..110Y 1.,.YJC Yin.9 I ;; 3Nr11Jnb151.v1 310NNY11 II 0310001 Mv11T4A,.10 N;I , 3NNVN33n'SL`J3AM3 01.1 I \ i N%ONYY, 1311r0'S1000JUa3.5 COVONYLS LLYI _ L_W_3f:n.,a'.C,Y3N'0NI]n:i1 OW`Vb 1 I VMW/1005Y. JO 9(Y)Ctt N0L03G rL-'.f{!a'f-,Ll O:Wr0 0MJ51A3 F)350:M0 rave 310n.3e--, 11 � i I,.-. IN1 NU0.. NV.' A m013010.1.9 \ -: A-7-7 PC. 31 45�JO L3LIlO JOW in.alltl ( Y� 5J00Y /p 313 3 ':7J Y•L 3 ____._ .... ..._.-__....._.__IJ10_-_. r • •._``Y. -; - .."'am_r.._.-.__ __ 1VNA ONOJ oI _ n _ I G-- ��Z. 4:WI C?,CTrY'e Niy_---Y----' mw .I F{l..., 31�1 1 1 \ 1.�,:.. - 1 YM rob x ,p �rrvM 2T; Y 1\ .TY 1 \ i:Y3rv3`.Ye O.fiS90 t.PwrvW \ IC.:ta s- •�^ `\t 3' I'kU1F'»JLT-'� ca L 1 T10YYL O a li y ( 1 -_.—__-- NC / Slit 9L Y•E I( lYN ibO1i 1NObI i �) ,[KOC 0 kAlIm3101 1N3N3SV3 CYgY NYId OWOM'1Y !-YV-1 �--•JSOa 3:X0:1 3AOM3b NOLJ1412SH3J r �b SS3,'JJY y xry CN31Y • AbvWAN31,O[ H,3M1 A M3N .03 1 ]OW�1- J3JN3i - 01/ .9 ON 11 53301.NM13b - .aC -0030.1z 11 : MNfI NnHI 9 MM 1J/ 9LYJ 35f0n �{T /. -_.__...... ..._._... 1._�_ _.•_!_. ...__._ M s1 re» LPEt Lal)tYl .09' 1_-. leAWAI'3 I •N e \ ' ' 31e CC W J 'DY .9-.a Eli m-,. ) ----..... :_ >-'. ----..--• Y3'•9L-1 rn u 2)0aaVn♦.7n-. - - •._ lat an Oa ONGYO V315.9I!%t' .YI�3C a ._y_.... ri yL �oi V —�� Trv15N Or N+ba \y / �� I U lLR3H (1 _ G ry 'Y0'b� Q "� 0030.21 s /.iv 1N3n35v3 (/ yI B 5S / S O • .Vi a '?' A1114n • 3111Y Si 01WStt3-• (p/$ / 3QM� 1 a Nv03J.1K I I V (1 gi / �¢/ U'.YrJ 9 Al.,a]N- ST310Y lilvtlO AIN Y 01� • I m v - n3n 1L1 Jr 15 • ! OS.z1 n sl 30MPW (�J ,` O OnM1 3b1 ; g- •osly oma IOJOYL Lcc.z 5 8 ° nu 101 1V! M31Y10 Alb3a0ba 014t1N3(k.1 3Nl A3 u3sn 3B AVII AO tI 093 0 y 1 visor m l'IC uyyl OW SS37,, in3Y3YY3,loin M3N Y b1 11'AVM TIV12M �I,A{f 0 Jcr \' G Z E k i .0 VOW Nmn•v LON SI Ma G53YJY Mln Su0 i01[lal rc1 m '1N3Y135Y3 A1f31n 7091-,'.:I 9K 10YM( 0 3141 N!OSL31N13 39 TIYNS HOP.W Nn 133.,OL onn,.. lnlrvbi5 V IW1Hvi13 314 NO 11 0 ONLG,X3 ITl Z O Z 3a 01 NOLLY0O1 O1r3 rru 310 1v dn C3SY0 4 A S 1N3N35 ALr*ln 30M.Sl 3N1 550a3Y Al1MJf1 13)1S Avn I1 WIt93N 01 3N 3AV S"3NLY 3X'-Ia319 ONOS03 310 Mai 03A3S;Anton M3N 31U 'NY.O11S SY 1113n3GY3.0 Y31N3J NI 0 033Y41 38 TIVHS J 3101Wv11 YDNNYn 0NLLSIX3 Ol C410101NOO 3LYl MOVJ Ol p 1r13415V3 al 030/0430 ION GI 1lLlrtLON t•0I 1S HL8l 3N Lo g g I- U W a • cc I I I I I I I I I I I r 1 1 r r r r APPENDIX A BOREHOLE LOGS Aeennirr4oe T . , Unified Soil Classification System Component Definitions by Gradation Soil Classification Component Size Range Criteria for Assigning Group Symbols and Names Generalized Group Descriptions Boulders Above 12 in. COARSE—GRAINED SOILS GRAVELS CLEAN GRAVELS OW Well—graded Grovels Cobbles 3 in. to 12 in. More than 50% More than 50% of Less than 5% fines retaned on coarse fraction GP Poorly—graded gravels No. 200 sieve retained on Grovel 3 in. to No. 4 (4.76mm) No. 4 Sieve Gravel and Silt GRAVELS WITH FINES GM Mixtures Coarse gravel 3 in. to 3/4 in. More than 12% fines Gravel and Clay Fine grave: 3/4 in. to No. 4 (4.76mm) GC Mixtures Sand No. 4 (4.76mm) to No. 200 (0.074mm) SANDS CLEAN SANDS SW Well—graded Sands Coarse sand No. 4 (4.76mm) to No. 10 (2.0mm) 50% or more of Less than 5% fines coarse fraction SP Poorly—graded Sands Medium sand No. 10 (2.0mm) to No. 40 (0.42mm) posses No. 4 Sieve Fine sand No. 40 (0.42mm) to No. 200 (0.074mm) SANDS WITH FINES SM Sand and Silt Mixtures More than 12% fines Silt and Cloy Smaller than No. 200 (0.074mm) SC Sand and Clay Mixtures FINE—GRAINED SOILS SILTS AND CLAYS CL Low—plasticity Cloys 50% or more passes Liquid limit INORGANIC Non—plastic and Low— the No. 200 sieve less than 50 ML Plasticity Silts Samples Non—plastic and Low— Plasticity Organic Cloys ORGANIC OL Non—plastic and Low— SS SPT Sampler (2.0" 00) Plasticity Organic Silts HD Heavy Duty Split Spoon SILTS AND CLAYS CH High—plasticity Cloys SH Shelby Tube Liquid limit INORGANIC P Pitcher Sampler greater than 50 MH High—plasticity Silts B Bulk High—plasticity C Cored ORGANIC OH Organic Cloys High—plasticity Organic Silts Unless otherwise noted, drive sampros advanced with 140 lb. hammer with HIGHLY ORGANIC SOILS Primarily organic matter, dark in color, andPT Peat 30 in. drop. organic odor Relative Density or Consistency Laboratory Tests Utilizing Standard Penetration Test Values Test Designation b Cohesionless Soils(o) Cohesive Soils Moisture (1) Density 0 (c) Relative (c) Undrained (d) Groin Size G Density(c) N. blows/ft. Density Consistency N. blows/it. Shear) (pStrength sf) Hydrometer H Atterberg Limits (1) Very loose 0 to 4 0 — 15 Very soft 0 to 2 <250 Consolidation C Loose - 4 to 10 15 — 35 Soft 2 to 4 250-500 Unconfined U Compact 10 to 30 35 — 65 Firm 4 to 8 500-1000 UU Triox UU Dense 30 to 50 65 — 85 Stiff 8 to 15 1000-2000 CU Trion CU Very Dense over 50 >85 Very Stiff 15 to 30 2000-4000 CD Triox CD Hard over 30 >4000 Permeability P (a) Soils consisting of gravel, sand, and silt. either separately or in combination, possessing no characteristics (1) Moisture and Atterberg Limits of plasticity, and exhibiting drained behavior, plotted on log. (b) Soils possessing the characteristics of plasticity, and exhibiting undraied behavior'. (c) Refer to text of ASTM D 1586-84 for a definition of N; in normally consolidated cohesionless soils Relative Density terms are based on N values corrected for overburden pressures_ (d) Undrained shear strength - 1/2 unconfined compression strength. Silt and Clay Descriptions Typical Unified Description Designation Descriptive Terminology Denoting Component Proportions Silt ML (non—plastic) Clayey Silt CL—ML (low plasticity) Silty Cloy CL Descriptive Terms Range of Proportion Cloy CH Trace 0-5% Plastic Silt NH Little 5-12% Organic Soils OL. OH, Pt Some or Adjective(a) 12-30R Md 30-50% (a) Use Gravelly, Sandy or Silty os appropriate. eGolder Associates Figure SOIL CLASSIFICATION/LEGEND PROJECT: Renton/Highgate• RECORD OF BOREHOLE BH-1 SHEET 1 OF 1 Sewer/WA DATUM: MSL PROJECT NUMBER: 993 1606 BORING LOCATION: Renton,Washington BORING DATE: 10/4/99 OSOIL PROFILE SAMPLES PENETRATION RESISTANCE _ BLOWS/FT PIEZOMETER GRAPHIC LLU ELEV ¢ BLOWS/6 1N. (r 10 2,0 �0 40 50 C7 x w N ¢ WATER CONTENT,PERCENT WATER F Z DESCRIPTION Co a co a 1401b.hammer w w �V r WI LEVEL om ? DEPTH z f- 30 inch drop ¢ F 256.0 0 Forest duff°'.' Compact,light brown,nonstratltied,line to coarse SAND,trace angular gravel,some silt,damp (RECESSIONAL OUTWASH) _ 2.5 SM 1 SS 9-9-9 18 18/18 0 4.4 I G 4.0 5 7.5 16.3 Compact,olive brown,nonstratltied,silty,tine to SM 2 SS 5-6-7 13 18/18 III 0 ATD coarse SAND,trace gravel,iron stained, interbedded clayey silt lenses,moist to wet 9.0 N (RECESSIONAL OUTWASH) x 10 - 12.5 18.4 0 SM 3 SS 6-7-11 18 18/18 II 14.0 —15 17.5 • SM 4 SS 35-40-50/6 >50 18/18 8.70 H Boring Terminated O 19.0 ft bgs 19.0 _20 _25 —30 DRILL RIG: 8-24 LOGGED: SLM 0— Associaks DRILLING CONTRACTOR: Boretec CHECKED: DPF Golder DRILLER: Rich DATE: 12/14/99 1 PROJECT: Renton/Highgate RECORD OF BOREHOLE BH-2 SHEET _ _OF Sewer/WA DATUM: MSL PROJECT NUMBER: 993 1606 BORING LOCATION: Renton, Washington BORING DATE: 10/4/99 0 SOIL PROFILE SAMPLES I PENETRATION RESISTANCE BLOWS/FE I. PIEZOMETER 0 ILIl0 021 �0 q0 50 GRAPHIC w v ELEV ¢ BLOWS/6 IN. t` c7 = w N a WATER CONTENT,PERCENT WATER ct. z DESCRIPTION < wco 140 lb.hammer U �! WI LEVEL w O 0 cc S 0 O DEPTH Z r 30 inch drop ¢ vot r o m 248.0— — 0 Forest duff Loose,dark brown,nonstratitied,silty SAND, SM trace gravel,organics present as roots and wood, moist(FILL) Loose,olive brown,laminated,silty fine SAND, SM 2.5 iron stained,wet(RECESSIONAL OUTWASH) 1 SS 3-3-4 7 18/18 I 29.3 0 Aro 4.0 —5 a I in _ 7.5 15.0 Dense,olive gray,nonstratified,silty fine to coarse SM 2 SS 20-26-15 41 18/18 0 SAND.little subrounded gravels,occasional iron staining,moist to wet(TILL) 9.0 10 12.5 13.5 SM 3 SS 20-23-18 41 18/18 0 . Boring Temtinated 0 14.0 ft bps 14.0 —15 —20 —25 —30 DRILL RIG: B-24 LOGGED: SLM DRILUNG CONTRACTOR: Boretec CHECKED: DPF A older DRILLER: Rich DATE: 12/17/99 Associates SHEET 1 OF 1 PROJECT Renton/Highgate RECORD OF BOREHOLE BH-3 • Sewer/WA DATUM: MSL PROJECT NUMBER: 993 1606 BORING LOCATION: Renton,Washington BORING DATE: 10/4/99 SAMPLES PENETRATION RESISTANCE 0 SOIL PROFILE I BLOWS/FT . PIEZOMETER w w 0 SO 2,0 �0 40 50 GRAPHIC u_ U ELEV. rr BLOWS/6 IN. • 0 x w N Q WATER CONTENT,PERCENT WATER 2 Z DESCRIPTION a m w U ~a O Q o ? a 1401b.hammer w W a^/ r WI LEVEL w O j Lry DEPTH z 1- 30 inch drop CC p pm - ` 251.0 — 0 a . Forest duff _ .; _ Loose,dark brown,nonstratified,silty SAND, organics present as roots and wood,moist to wet (FILL) - 2.5 ATD Compact,reddish olive brown,nonstratified,line SM tg.8 0 to coarse SAND,little silt,wet(RECESSIONAL • 1 SS 1-4-4 8 2'/18 OUTWASH) - 4.0 5 N 2 a coarsening with depth • 7.5 SW 2 SS 8-9-11 18 18/18 U 020.4 G 9.0 10 12.5 SM 3 SS 15-16-22 38 18/18 012.5 II Boring Terminated @ 14.0 ft bgs 14.0 -15 -20 -25 DRILL RIG: B-24 LOGGED: SLM t� DRILLING CONTRACTOR: Boretec CHECKED: DPF ( older DRILLER: Rich DATE: 12/17/99 el1710A 'A SHEET 1 OF 1 PROJECT: Renton/Highgate RECORD OF BOREHOLE BH-4 Sewer/WA DATUM: MSL PROJECT NUMBER: 993 1606 BORING LOCATION: Renton,Washington BORING DATE: 10/4/99 O SOIL PROFILE SAMPLES PENETRATION RESISTANCE BLOWS/Fr. PIEZOMETER I- p 10 �0 �0 g0 50 GRAPHIC w U ELEV. ¢ BLOWS/6 1N. r` c� = w N co < WATER CONTENT,PERCENT WATER o_ DESCRIPTION U ¢ a 1401b.hammer w r Xi r WI LEVEL fD CO w O DEPTH z I- 30 inch drop cc WP 250.0- - 0 Forest duff ' _ Soft,dark brown,nonstratified,organic,fibrous PT - PEAT,wood fragments,moist to wet(PEAT) ATD Ps _ 2.5 Loose,olive brown,nonstratified.fine to coarse SW 1 SS 4-3-3 6 18/18 I 023.9 132.2 0-o SAND,trace silt,little organics,wet _ - (RECESSIONALOUTWASH) 40 5 I 7.5 19.5 C - SW . _ 2 SS 5-8-11 19 18/18 I 9.0 10 Very dense,olive brown,nonstratified,silty SAND,little gravel,moist(TILL) 12.5 SM 3 SS 50/4' >50 4/18 011.4 II-* Boring Terminated 0 14.0 ft bgs - 14.0 . -15 -20 _25 -30 DRILL RIG: B-24 LOGGED: SLM 041- DRILLING CONTRACTOR: Boretec CHECKED: DPF AssCjO Pr DRILLER: Rich DATE: 12/17/99 • SHEET 1 OF 1 PROJECT: Renton/Highgate RECORD OF BOREHOLE BH-5 Sewer/WA DATUM: MSL PROJECT NUMBER: 993 1606 BORING LOCATION: Renton,Washington BORING DATE: 10/4/99 O SOIL PROFILE SAMPLES PENETRATION RESISTANCE BLOWS/FT. 1 PIEZOMETER W w 0 1,0 ?,0 �0 q0 50 GRAPHIC LL 0 ELEV. ¢ BLOWS/6 IN. 0 = w N < WATER CONTENT,PERCENT WATER a z DESCRIPTION U ¢ 9 f a 140lb.hammer i rr r WI LEVEL w w CC DEPTH z 30 inch drop cc wp p m 250.0 p �/V, Soft,dark brown,nonstratified,organic,fibrous W", PEAT,little sand and wood fragments,moist to 1 wet(PEAT) ATD W 2.5 PT 1 SS 1-4-5 9 18/18 49.50 Loose,olive brown,nonstratified,organic SWs. r CLAYEY SILT,little sand,organics present as /�, 4.0 roots and wood,wet(PEAT/ORGANIC SILT) — 5 N Compact,light brownish gray,nonstratified,silty = lime to coarse SAND,wet(RECESSIONAL - 'a OUTWASH) 7.5 SM 2 SS 8-12-14 26 18/18 16.60 • 9.0 10 12.5 SM 3 SS 8-12-17 29 18/18 020.9■ G Boring Terminated C 14.0 ft bgs 14.0 — —15 20 —25 _30 DRILL RIG: B-24 LOGGED: SLM n■■■�����A���,,, DRILLING CONTRACTOR: Boretec CHECKED: DPF e—DRILLER: Rich DATE: 12/17/99 PROJECT: Renton/Highgate RECORD OF BOREHOLE BH-6 SHEET 1 OF Sewer/WA DATUM: MSL PROJECT NUMBER: 993 1606 BORING LOCATION: Renton,Washington BORING DATE: 10/4/99 O SOIL PROFILE SAMPLES PENETRATION RESISTANCE _ BLOWS/FT. PIEZOMETERGRAPHIC r w 0 \0 20 3 qo 0 w U ELEV. ¢ BLOWS/6 IN. — 1 0 = w N < WATER CONTENT,PERCENT WATER o. cc DESCRIPTION v Q j a 140lb.hammer w W �N i WI LEVEL w O DEPTH z 30 inch drop rt p m 257.0 0 Loose,olive gray,nonstratified,mottled,fine to medium SAND,little silt,trace gravel,iron , staining,moist to wet(FILL) 2.5 _ SM 1 SS 4-3-3 6 18/18 III 19.3 0 4.0 T ATD 5 I I 0 _ 7.5 19.8 0 25.2 Compact,olive gray,nonstratified,fine to medium SM 2 SS 1-5-8 13 18/18 • 0 SAND,some silt,wet(RECESSIONAL - OUTWASH) 9.0 - 10 interbeds of laminated gray silt - 12.5 SM /18 • 0 21 3 SS 8-6-4 10 18 .4 G Boring Terminated st 14.0 ft bgs 14.0 15 - -20 25 _ 30 DRILL RIG: 8-24 LOGGED: SLM DRILLING CONTRACTOR: Boretec CHECKED: OPF ell 07 Golder DRILLER: Rich DATE: 12/17/99 I��SSO�1� APPENDIX B LABORATORY TEST RESULTS e+..i.i— A cce.e.ie.4ec • GOLDER ASSOCIATES, INC. -- REDMOND, WA MOISTURE CONTENT CALCULATION SHEET ASTM D-2216 PROJECT: CITY OF RENTON / HIGHGATE SEWER /WA PROJ. NO: 993-1606.200 DATE: 10/28/99 TECH: TCM REVIEW: TCM BORING SAMPLE DEPTH WET WT. DRY WT. TARE WT. TARE MOISTURE (ft) (9) (9) (9) NO. (%) BH-1 S-1 2.5 395.40 382.40 85.20 4.4 BH-1 S-2 7.5 451.70 401.00 90.20 16.3 BH-1 S-3 12.5 453.70 395.20 77.80 18.4 BH-1 S-4 17.5 457.20 427.70 88.30 8.7 BH-2 S-1 2.5 369.80 306.40 89.70 29.3 BH-2 S-2 7.5 565.00 503.00 89.90 15.0 BH-2 S-3 12.5 470.30 423.20 73.40 13.5 BH-3 S-2 7.5 593.90 506.60 78.90 20.4 BH-3 S-3 12.5 515.10 467.70 89.40 12.5 BH-4 S-1 up 2.5 190.20 137.60 97.80 132.2 BH-4 S-1 low 2.5 384.20 327.60 90.90 23.9 BH-4 S-2 7.5 516.30 446.70 90.50 19.5 BH-4 S-3 12.5 238.90 225.50 108.30 11.4 BH-5 S-1 2.5 329.30 249.10 87.10 49.5 BH-5 S-2 7.5 583.90 516.00 107.00 16.6 BH-5 S-3 12.5 523.90 449.10 90.70 20.9 BH-6 6-1 2.5 466.80 406.00 91.20 19.3 BH-6 S-2 up 7.5 381.00 332.90 89.90 19.8 BH-6 S-2 low 7.5 480.50 405.30 107.00 25.2 BH-6 S-3 12.5 468.80 405.10 107.00 21.4 2.5 181.40 169.70 107.60 18.8 BH-3 S-1 ---- GOLDER ASSOCIATES, INC. -- REDMOND, WA GRAIN SIZE ANALYSIS -- WASH SIEVE ASTM D1140 / D422 PROJECT: CITY OF RENTON / HIGHGATE SEWER / WA PROJECT NO: 993-1606.200 DATE: 11/1/99 TECH: TCM REVIEWER: TCM BOREHOLE BH-1 SAMPLE S-1 DEPTH (ft) 2.5-4 Description: Brownish Gray, F-M SAND, some silt, trace fine gravel USCS: SM I NATURAL MOISTURE C Gravel 0.0% Tare Number F Gravel 1.8% Wet Weight + Tare (g) 583.00 C Sand 8.1 Dry Weight + Tare (g) 570.00 M Sand 44.4% Tare Weight (g) 272.80 F Sand 32.5% Water Content (%) 4.4% Fines 13.1% Sieve Retained Passing (g) cum. tare 272.80 3" 272.80 100.0% LL 2" 272.80 100.0% PL 1" 272.80 100.0% PI 3/4" 272.80 100.0% 3/8" 274.70 99.4% #4 278.20 98.2% #10 302.40 90.0% #20 363.30 69.5% D10: 0.060 #40 434.40 45.6% D30: 0.15 #60 483.20 29.2% D60: 0.6 #100 508.20 20.8% Cu: N/A #200 531.10 13.1% Cz: N/A PARTICLE SIZE DISTRIBUTION US STANDARD SIEVE OPENING SIZES , • 3' 2' 1■ 3/4' 3/8' #4 #10 #20 #40 #60 #100 #200 100 $ ' - I. 90 - _. 80 - 70 GO . C a 0 4 30 20 - 10 0.1 0.01 0.001 01� 10 Grain Size (mm) Coarse Fine Coarse I Medium I Fine GRAVEL SAND FINES (Silt or Clay) SAMPLE ID DEPTH MI W% LL PL PI USCS DESCRIPTION BH-1 2.5-4 4.4% SM Brownish Gray, F-M SAND, some silt, trace fine gravel S-1 p GOLDER ASSOCIATES, INC. PROJECT: CITY OF RENTON /HIGHGATE SEWER /WA REVIEW: TCM REDMOND,WA PROJECT NO.: 993-1606.200 DATE: 11/1/99 TECH: TCM GOLDER ASSOCIATES, INC. -- REDMOND, WA GRAIN SIZE ANALYSIS -- WASH SIEVE ASTM D1140 / D422 PROJECT: CITY OF RENTON / HIGHGATE SEWER /WA PROJECT NO: 993-1606.200 DATE: 11/1/99 TECH: TCM REVIEWER: TCM BOREHOLE BH-3 SAMPLE S-2 DEPTH (ft) 7.5-9 Description: Light Yellowish Brown, F-M SAND, little silt, trace f gravel USCS: SW - NATURAL MOISTURE C Gravel 0.0% Tare Number F Gravel 1.5% Wet Weight + Tare (g) 825.40 C Sand 4.8% Dry Weight + Tare (g) 738.10 M Sand 35.1% Tare Weight (g) 310.40 F Sand 48.7% Water Content (%) 20.4% Fines 9.9% Sieve Retained Passing (g) cum. tare 310.40 3" 310.40 100.0% LL 2" 310.40 100.0% PL 1" 310.40 100.0% PI 3/4" 310.40 100.0% 3/8" 310.40 100.0% #4 316.80 98.5% #10 337.20 93.7% #20 394.20 80.4% D10: 0.075 #40 487.40 58.6% D30: 0.25 #60 608.80 30.2% D60: 0.4 #100 668.60 16.2% Cu: 5.9 #200 695.90 9.9% Cz: 1.9 • r,. - PARTICLE SIZE DISTRIBUTION US STANDARD SIEVE OPENING SIZES 3' 2' 1' 3/4' 3/8' #4 #10 #20 #40 #60 #100 #200, 100 + t t -7.4.,.......7.....N: , 90 80 c N _ , as 50 0 40 - - 30 ~ 20_. 10 , - - - -- O- - Ai 0.001 0 10 0,1 100 Grain Size (mm) Coarse 1 Fine Coarse jMedium Fine GRAVEL SAND FINES (Silt or Clay) SAMPLE ID DEPTH (ft) W% LL PL PI USCS DESCRIPTION BH-3 7.5-9 20.4% SW Light Yellowish Brown, F-M SAND, little silt, trace f gravel S-2 0 GOLDER ASSOCIATES, INC. PROJECT: CITY OF RENTON / HIGHGATE SEWER /WA REVIEW: TCM REDMOND,WA PROJECT NO.: 993-1606.200 DATE: 11/1/99 TECH: TCM , GOLDER ASSOCIATES, INC. -- REDMOND, WA GRAIN SIZE ANALYSIS -- WASH SIEVE ASTM D1140 / D422 PROJECT: CITY OF RENTON / HIGHGATE SEWER /WA PROJECT NO: 993-1606.200 DATE: 11/1/99 TECH: TCM REVIEWER: TCM BOREHOLE BH-5 SAMPLE S-3 DEPTH (ft) 12.5-14 Description: Light Brownish G.silty fine to medium sand USCS: SM NATURAL MOISTURE C Gravel 0.0% Tare Number F Gravel 0.0% Wet Weight + Tare (g) 748.00 C Sand 0.6% Dry Weight + Tare (g) 673.20 M Sand 11.9% Tare Weight (g) 314.80 F Sand 39.2% Water Content (%) 20.9°/ Fines 48.4% Sieve Retained Passing (g) cum. tare 314.80 3" 314.80 100.0% LL 2" 314.80 100.0% PL 1" 314.80 100.0% PI 3/4" 314.80 100.0% - 3/8" 314.80 100.0% #4 314.80 100.0% #10 316.80 99.4% #20 324.70 97.2% D10: 0.004 #40 359.30 87.6% D30: 0.02 #60 430.60 67.7% D60: 0.2 #100 468.30 57.2% Cu: N/A #200 499.70 48.4% Cz: N/A .a F PARTICLE SIZE DISTRIBUTION • US STANDARD SIEVE OPENING SIZES 3' 2' 1' 3/4' 3/8' #4 #10 #20 #40 #60 #100 #200 100 r r r 90 80 70 60 Cri A al a.. , 30 , . . 20 10 0 -- - - 0' 0.01 0.001 .1 100 10 Grain Size (mm) Coarse 1 Fine Coarse I Medium I Fine GRAVEL SAND FINES (Silt or Clay) SAMPLE ID DEPTH (ft) W% LL PL PI USCS DESCRIPTION BH-5 12.5-14 20.9% SM Light Brownish Gray, S-3 silty fine to medium sand 0 GOLDER ASSOCIATES, INC. PROJECT: CITY OF RENTON /HIGHGATE SEWER /WA REVIEW: TCM REDMOND,WA PROJECT NO.: 993-1606.200 DATE: 11/1/99 TECH: TCM GOLDER ASSOCIATES, INC. -- REDMOND, WA GRAIN SIZE ANALYSIS -- WASH SIEVE ASTM D1140 / D422 PROJECT: CITY OF RENTON / HIGHGATE SEWER /WA PROJECT NO: 993-1606.200 DATE: 11/1/99 TECH: TCM REVIEWER: TCM BOREHOLE BH-6 SAMPLE S-3 DEPTH (ft) 12.5-14 Description: Gray, F SAND, some silt USCS: SM NATURAL MOISTURE C Gravel 0.0% Tare Number F Gravel 0.0% Wet Weight + Tare (g) 674.40 C Sand 0.2% Dry Weight + Tare (g) 610.70 M Sand 2.1% Tare Weight (g) 312.60 F Sand 77.0% Water Content (%) 21.4% Fines 20.8% Sieve Retained Passing (g) cum. tare 312.60 3" 312.60 100.0% LL 2" 312.60 100.0% PL 1" 312.60 100.0% PI 3/4" 312.60 100.0% 3/8" 312.60 100.0% #4 312.60 100.0% #10 313.10 99.8% #20 314.00 99.5% D10: 0.060 #40 319.40 97.7% D30: 0.09 #60 339.00 91.1% D60: 0.2 #100 419.50 64.1% Cu: N/A #200 548.80 20.8% Cz: N/A s i PARTICLE SIZE DISTRIBUTION r US STANDARD SIEVE OPENING SIZES e 3' 2' 1' 3/4' 3/8' #4 #10 #20 #40 #60 #1,00 #200 100 • • $ r - 90 00 - _ 70 00 — 0 C Cn A _ a. _ 0 40 , .. . . 30 - 20 — ' ` 10 - _ . 0 . 0.1 0.01 0.001 100 10 Grain Size (mm) Coarse I Fine Coarse I Medium Fine GRAVEL SAND FINES (Silt or Clay) SAMPLE ID DEPTH (ft) W% LL PL. PI ISMS Gray,D F SAND, N some silt BH-6 12.5-14 21.4% S-3 0 GOLDER ASSOCIATES, PROJECT: CITY OF RENTON /HIGHGATE SEWER /WA REDES INC.IN PROJECT NO.: 993-1606.200 DATE: 11/1/99 TECH: TCM REVIEW: TCM I 11 1 I I I I I I 1 ---- ------N, I 7 I I i \ ( f II/,s 3......,;c:a 1 1 ti -L — I`7- ;Zth Sr owl - ' i 1 1 bt-i _]___ ____. mg:11111 •.. Nii.41/ / I I I-1 •71 - - imam min in Pill 117 mu Ma NI ‘ \-- 1 1--- r4t- - --- 24 Mb IN 1- 1 1 1 ti 17 op 11 num I_ NI .. . . ., Bum .. a . �� ,11 __��__ �, „II i1111111\������■ , ,2 . SITE rearra i rE • ;71 No ■11111 .... NI pis am it... • r. I NE I r--2 dI 11■ %i• is i ■ I 11■ ■M ' ' 11 ■ 1111! ���II� eitIIII!li. Elm •■. ■ . ,■■„l h .Z `fat i i Z fa I — ILI mil. MMI I ■""""�ib "Ul ILV I- fc% V 6-7---: I Ertilkil 14111 -1 - BE al Pm .it. o ■i ■�. ■� ill i66h MOi'mM ■i11 I l l — - F-- I _ _ ------- , r / ____ \ fr --4 \ � 1\r- / - :::: :... , , _ inn■ ::: ...._. , _ HIGATE LIFT STATION ELIMINATION VICINITY MAP CrA{ F 1"_7(1(1' -- -'OK 111CRIC / SO• vr17hANO INKIER- 1 ♦ it 80 40 0 80 ___ 160 ----if � i„ �r ri, !I YQ IM I } grg t.r •,. _ i c0 N i@ I rife ,1 re,. 0, �`. Hit IN. FteF.lis a ...I.n.�r..Ms r.u -.cn+[��.ea.rsv..r.a v.nw.nnN� N. i, ••W' E ♦ J - .rsr 1•f.r.a•..•<... a rrmo,.r a.rt- p rrat <.a,a,.•n.raa.<. I f R� . I S ri is rt"^: t'� t s.•e wn nw ru.r.*r-<•ru. 1 1�88- ,� �r�ll l i �� X i[wn•r n.rRwnf ♦ •1 „re M'r... T -lM . xw K•uilv.:r'r•.n.•4 ri' _ r Sewer Construction Easement t ( .r<.riw �w� .,, ^"� e . { _ _iv D �0 1 i (' 4 .r .r1r1�.'Y•N'� an w'e.w. I �' `•"V 1•.a~!rr . le MM. ° :* •{ i I __ >< i 4 Al f o • 114 N J I _ P' 4 i—f t"' \ IN C.! --* —r— _ �� .- A -Rw- r w.•_. .- iT. I K my..., K_'VIM 1ck. • �: r wr+r/r1a IM 76 mew me raw: F� ' �- •, Blueberry Farm M Ir1 I �YsX•.- O.F Mr lMi_—......_:._. g! 1` 1) • N lyp j•.� 1 a t��On' m...KFw•.rU-afu r-.r fwt. • . V11 f](j1 `5, p _ (/'�)R it .c.. I '' "' pK rr 4..74,Cn .Ur RTR•/ ,0.11 M.NIA 146 i a It- I t j`O `M bq� V +-.-N�- C I WIC40...W ObO en ) 1�MML C.....,a.(norm-.- WO SP,. N p• 1 �-r k ! FF [ rea m tr•ur r..x.ry n...n en -- y a+r � yr N IS, N d 0tq �'�: t T W n ■ . A! $ _1 t , I ram Z• e•r` 11 13 7"7": i I ' Ili -7----- - Ci i : n s .,.� ��a o WETLAND �� I �� • 9 - ' _ , .,, 1 N v' ,��-'�w T[w tvV.{ �nw.AAMi� w. _••_ .w..ww.w. .n. . ).wwSriCw...1w.ui.it Ai�..w�M.A.`w-x-&mw.A.�• •• i I I dd Y En Y r ! Higate Creek I , -_ a$ a4 r j . .._ .rw•a . i. �� ,T� 1 ' I • , '\\\ I., ilk I ‘11.,. Oil [ 0 —— ---- *If fee, - -UM IND -asto I W -1101b MI AIM Ole,,w- am f-i• , Pond 7$ V1 1! 4... iI ( ( IWETLAND _ 1, -,-• .•�.. ""' ': 3 It i 1 i e .M� il_ tI w .. .. I I d! CI OP.�,�ENT Pj' i /-- rcxNq MfA rxEED FOPI d �'OF REN�NNING VN•.lE fAYl7 91[ II- I ON 1 i AE Single-Famlly:Realdencea > I = Legend FEB 1) 92000 ,a h. IIv,. 0' Wetland Buffer I I O cm a SP-� SOII f It ��v ° 1K, 1N dC M1-1w _ Wetland FII --- —,tom- it . _---- i W _- a9a - � _ - 1 —..- Jones Avenue �=E w Delineated Wetland Boundary i _ 1 \ `st WI _ , Approximate Wetland Boundary at . —41-._. --,-...7:,=---i .0..„,,,? 1 ., -...--1/4- --.-=•-g. 3 Jt M < Vl 50' Buffer Zone • at r) Higate Sewage Lift Station'`- Wetland Delineation Report i Figure 5 41113110 EN T R A N C O Wetland Delineation Map -\111111111111I rn o a a. Y e 4' `t S 4 A i I` R __ • I ..:.� ••�We r. 7 -1 z ••.ti • o r: .• RIP RAP APRON TO PREVENT GRASS SEEDED SIDE SLOPES Q FORMATION OF SCOUR HOLE z SECTION n o w Z w r 4,4 POSTS STRAW BALES WIRED TO WIRE 1 I ____j 1 o O WIRE UPSTREAM MESH FENCE & STAKED 2' I_"' Z OF POSTS FLOW INTO THE GROUND. 3 3 1 3:1 SIDE SLOPES 3:1 SIDE SLOPES W p ;•.,�MIR NM 1111K:. FLAT BOTTOM C¢.7 ••�i�. •4.ii.•�eii•i• �i i• ii SE •po p•••��••�•• Z 3:1 SIDE SLOPES SD= :•_=: DITCH IMPROVED SECTION A ::.:. SCALE 1/2" = 1'-0" PLAN 0 LT-4 o STRAW BALE CHECKS 0 . op 6 N.T.S. F-' z W a' Ua s m Cr C YI a s 3 l II lw i 1 CARRIER PIPE i; GENERAL NOTES �,-�� OUTSIDE DIAMETER OF JOINT BELL sl y 1. VERTICAL CONTROL DATUM BASED ON USC&GS. ,`v, i i 2. UTILITY CROSSING LOCATIONS AND ELEVATIONS SHALL BE DETERMINED BY THE 18" STEEL CASING PIPE CASING INSULATOR USE 3 PER CONTRACTOR IN ADVANCE OF ANY CONSTRUCTION ACTIVITIES. 20' OF PIPE (CALPICO INC., ENDS OF EXISTING CASING; REMOVE CASCADE WATERWORKS MFG. CO., 3. EXISTING PRIVATE IMPROVEMENTS SHALL BE TEMPORARILY RELOCATED AND WELDED CAP, INSTALL UTILITY PIPE OR APPROVED EQUAL) u 0 n o i PERMANENTLY REPLACED TO ACCOMODATE SERVICE CONSTRUCTION. AND INSULATORS, AND SEAL UTILITY @@g� ggQ gg �9 PIPE TO CASING WITH CASCADE SYSTEM # 9 ( R iJ 4. STATIONING SHOWN IS DEFINED BY THE CONTROL POINTS. CCES CASING END SEAL OR APPROVED EQUAL i ,fit a 'EE S cc S. ALL MANHOLES SHALL HAVE LOCKING LIDS. (TYPICAL) a 6. PROVIDE AS-BUILT INFORMATION SHOWNINC ALL INVERT AND RIM ELEVATIONS. - - �J S - - _4____ - 9 7. INSTALL SEWER MAIN AND SERVICES A MINIMUM 2' FROM PARALLEL GAS LINES • o WHERE CONFLICT OCCURS. 1. INSULATORS SHALL BE MECHANICALLY CLAMPED TO PIPE: Y 8. ALL CEMENT CONCRETE DRIVEWAYS AND ALLEY APPROACHES SHALL BE 10" THICK. CUSHION BETWEEN PIPE AND INSULATOR SHALL BE LINED m WITH RUBBER OR PVC; INSULATOR SHELL SHALL BE A 9. THE CONTRACTOR SHALL VERIFY THE LOCATION AND ELEVATION OF ALL UTILITIES MINIMUM 14 GAUGE STAINLESS STEEL. LOW DEFLECTION PRIOR TO CONSTRUCTION. CONTRACTOR SHALL COORDINATE RELOCATION WITH UNDER COMPRESSION, AND HIGH RESISTANCE TO ABRASION; UTILITY OWNER IF REQUIRED. INSULATORS SHALL BE MANUFACTURED BY CASCADE . WATERWORKS MFG. CO., CALPICO, INC., OR AN APPROVED EQUAL. 10. THE MATERIAL PRESENTED ON THIS DRAWING IS FOR REFERENCE ONLY. SOME OF THE DETAILS OR INFORMATION PRESENTED ON THIS DRAWING MAY NOT BE 2. CONTRACTOR IS RESPONSIBLE FOR EXCAVATION SLOPE STABILITY REQUIRED AS PART OF THIS CONTRACT. AND DEWATERING DURING UTILITY INSTALLATION WITHIN EXISTING CASINGS. 11. PROPERTY LINES ARE SHOWN FOR REFERENCE ONLY. z 12. CITY OF RENTON STANDARD DETAILS ARE LOCATED WITHIN THE BOUND g SEWER CASING DETAIL e CONTRACT SPECIFICATIONS. N.T.S. ¢ 13. TRENCH SAFETY AND SHORING SHALL MEET ALL OSHA AND WISHA STANDARDS. TRENCHES SHALL BE SEALED TO PREVENT ENTRY DURING NON-WORKING HOURS. 14. WHERE UTILITY PIPE LINE VERTICAL SEPARATION IS LESS THAN (1) ONE FOOT, INSERT ETHAFOAM HS 600 PLANK-FOAM BOARD OF EQUAL AS CLEARANCE SEPARATION. o 5 - 210905 1 °' O IS N 4 Y -- —I b 11 i I t_ I HI IJI Ill iiiiIIIIIll'ITUdpuIWG IIIIilI1 lluhll 01 1171 I m 1!Il,��IthiIWI'MtiWWWwiiiiiwwlw iiiii ualm!7 U, N -- FOR PATCHING _V / �\/\ \/\\\/\\\/\ \/\\/\ \ \ CL // / / // // // // // // //. 4/4,.......... SEE DETAIL \ \ \\ \\ \\ \\ \\ / Z ������������ O \ \ \ \/\/\/\/\/�/ BACKFILL MATERIAL 0 ............ /\ \ \ \ \ ,..........., /\/\ \/\/\ NATIVE SOILS /\/\/\/\/\/ 0 O ♦..........� BACKFILL MATERIAL �...........: r Z WITHIN THE RIGHT-OF-WAY ►.........../ Q AS SHOWN IN DETAIL ► .. BACKFILL MATERIAL aT :Of, 8" SANITARY SEWER •�����������l WITHIN THE RIGHT-OF-WAY l_ AS SHOWN IN DETAIL J •►-.-.-.-.-.-.•.-.-.-.-.CI - Z PIPE BEDDING MATERIAL . L 6" AS SPECIFIED IN 9-03.16 / 8" SANITARY SEWER EXCAVATION OF UNSUITABLE SOIL AND i0 BACKFILL OF FOUNDATION MATERIAL (IF NECESSARY) � / DEPTH AS APPROVED BY ENGINEER. MATERIAL SHALL MEET SECTION PIPE BEDDING MATERIAL ' 9-03.9(1) BALLAST AS SPECIFIED IN 9-03.16 wz o 6" 0 O 3 TRENCH SHALL BE REMOVED, EXCAVATION OF UNSUITABLE SOIL AND 1. ALL UNSUITABLE MATERIALS EXCAVATED FROM THE F-' BACKFILL OF FOUNDATION MATERIAL (IF NECESSARY) �7-, '.:iBEDD NG AND BIA KFILL MATER ALSO SSSHOWNB NR RENCH B CKFILLO DETAILOAND DEPTH AS APPROVED BY ENGINEER. E'W 2 COMPACTED IN ACCORDANCE WITH SPECIFICATIONS. MATERIAL SHALL MEET SECTION U W 9-03.9(1) BALLAST .o`- 2. ALL TRENCHES IN ARTERIAL STREET ROADWAY AREAS SHALL BE BACKFILLED .5 AND PATCHED WITH TEMPORARY ASPHALT AT END OF EACH WORK DAY. SANITARY SEWER BACKFILL 1. ALL UNSUITABLE MATERIALS EXCAVATED FROM THE TRENCH SHALL BE REMOVED, G iI c HAULED AND DISPOSED. EXCAVATION SHALL BE REPLACED WITH FOUNDATION, WITHIN RIGHT—OF—WAY DETAIL 2—A BEDDING AND BACKFILL MATERIALS AS SHOWN IN TRENCH BACKFILL DETAIL AND n COMPACTED IN ACCORDANCE WITH SPECIFICATIONS. N.T.S. 2. ALL TRENCHES IN ARTERIAL STREET ROADWAY AREAS SHALL BE BACKFILLED = AND PATCHED WITH TEMPORARY ASPHALT AT END OF EACH WORK DAY. !i oil,I SANITARY SEWER BACKFILL q4S WITHIN WETLAND DETAIL 2—B N.T.S. TYPICAL — pqp SANITARY TRENCH i 1:1 �Jf�IIIQI !j/jll/I !I01101luJ jn IIIIIIII�flllIi!v pIIu I1I1T,yIIItliyI lw��llldl��m�l�u�„JI %@ g \ � \7 \/ \� /�\/\/��//\//\//�/ \ \ \ \ \ /\�j /\/\/\ \/\/ CONCRETE (2 ASPHALT LIFTS) o c / // // / 7 /› 7X)\ // /, BACKFILL MATERIAL � � \ \ \ \ \ \ \ \ Y�\ \\ \\ \ NATIVE SOILS FINAL JOINT MUST l' l' o \ \ \ \/\/\/\/ j \\\� --I 12" eE snw cur \ '1\ s,\/.\/,\' .s.\ '\/.\/\/,\/.\/ I IIIIIIII\\\ \\IIIIIIIIII cc a 6cL \ 6" MINIMUM CRUSHEDSURFACING TOP COURSE\ ,�������������.�������.�.���� / ao --CONTROL DENSITY FILL ►������ ������� \ ;\\ SUBSEQUENT BACKFILL MATERIAL m . e• OR(NATIVE IF IMPORT PER RSECTION 9OVED BY N 3.9(3)) SEWER / \ STREET PATCHING / 1 ) CRUSHED SURFACING BASE COURSE N.T.S. 4,5 Y-o• T NOTES: 1. ALL TRENCHES IN ROADWAY AREAS SHALL BE BACKFILLED AND PATCHED PER SPECIAL PROVISION 5-06.1 AT THE END OF EACH WORK DAY. THIS WORK SHALL BE INCIDENTAL TO ALL TRENCH RESTORATION WORK. I. THE TRENCH PLUGS SHALL EXTEND 2 FEET o BELOW THE BOTTOM OF THE SEWER 2. THE FINAL SAWCUT JOINT SHALL BE A MINIMUM OF (1) ONE FOOT BEYOND N PIPE TRENCH BY 3 FEET EITHER SIDE OF LJ S THE TRENCH.BY 3 FEET ABOVE THE THE UNDISTURBED EDGE OF THE TRENCH. K ELEVATION OF THE CROWN OF THE PIPE. TRENCH PLUGS SHALL BE A MINIMUM OF 3 3. ALL ASPHALT PATCH AREA OUTSIDE OF PAY LIMIT SHOWN SHALL FEET IN LENGTH. BE CONSIDERED INCIDENTAL TO OTHER ITEMS OF WORK. 4. ALL TEMPORARY PATCHES ON TRENCHES SHALL BE PERMANENTLY CONTROL DENSITY FILL PATCHED WITHIN (2) TWO WEEKS OF COMPLETION OF WORK WITHIN TRENCH PLUG C THE ROADWAY AREA UNLESS APPROVED BY THE ENGINEER. ) N.T.S. 2,3 z S — 2 1 0 9 0 5 om ° cn a N x SOUTH 1/2 SECTION 5 TWP 23N R 5E N TAX LOT 3200 �r ��� TAX LOT 3202 _ — _��< I HOUSE /1800 MATCH LINE STA 10+60 HOUSE #1824 SEE SHEET 3 ' i IZ \ h a I I •g I \ NEW MANHOLE /} y�20- FIR 0 W POHL SHORT P T A W rn 1 BO PVC CONNECT EXIST. 12" APPLE LOT 2 ,fi �+ I 'I DECID. Q Z \� OLD TRACT 293 C��"jj cwi I S I I U �'�o•, MANHOLE ) Z c�� 2 8- 'tp ty < I 2" ORNAMENTAL COL wE1LA140 `,.;.�,� 2 - 18 y - IPp : ;:�• DECID. pE1LANOBUFFER �. W c^Z ALDERS t _ BW NDARYI __ -- -- --IV, --- J w __ j°_� -- - lif- - -- y\ CONNECT TO w Q ✓ 2 - 6" BIRCH EXISITNC MH CUT AND PATCH • O TOE OF .LOPE \,` TOE OF SLOPE _' RECHANNEL EXISTING PAVEMENT 2 (n CONC. WALL • `1� . Rik li_ i .. I O , W o E 1 9.61 _ - (I) zQ 6" W N ROCK WALL `71 r4. 4 . yg1 I� „ t e- 2+W 3+00 - STF �1_ , I FJ.a9 y I _E 20TH ST ,�.4.—�_ \ + ( -�+- J S 8 S 3 S S PLUG LINE W N 188877.74 - ------\ # Q E 1303565.23 FM " " _ ��- y o :� F I D7i ' _-I A��1FA,, CONC. VAULT _ 4IIMINi l,4.II L`1�i V DITCH -- -- _ PLII EX. FORCEMAIN IE 248% 24" CONC. CULV ROCKS O I IE 249.03 XI T. MH 12" CON PLUG INLET AND OUTLET OF EXIST. IE 2 .70 4 a '4" FORCEMAIN IN ACCORDANCE WITH MN a REMOVE AND DISPOSE OF EXISTING GUARD L2 CONC. CULV SECTION 7-17.3(4)6 OF WSOOT/AP WA ABANDON I O RAIL AND FENCING. REMOVE STRUCTURES n 1991 STANDARD SPECIFICATIONS. OUTLETAND CULVERTS. RECHANNEL CREEK. INSTALL o OF FORCEMAIN LOCATED IN MANHOLE LIFT STRUCTURE .=c 6" PEA GRAVEL BOTTOM AND RIP RAP G4,'�-, Y AT INTERSECTION OF JONES AVE. AND SEE SPECIFICATION CREEK BANKS. THIS WORK SHALL BE INCLUDED 20TH O 3 INCLUDEDSTREETLUMP PR!CETHIS WORK ALBID FOR L BE SECTION 2-02.3(1) IE 247.64 IN LUMP SUM PRICE BID FOR ABANDON EXIST. 0>y H u ABANDON EXISTING PUMP STATION. IE 248.15 PUMP STATION. zo E-'w ci U Q-I' m OWBERRY FARM a`- '5TRACT 285 HOUSE /1733 m PLAN 4: 1I 1SCALE , _ 20• cr a 4 4- ii.me . - j 41,' n 280 .. ~ 280-- t6' 12' y o ' 252 EXISTING ROAD GRADE — 252 fa ▪ o 1 p 270... - -- • N 270 RIP RAP LIGHT AND LOOSE ri ''' z Ix _247 SIDE SLOPES -------_i-- 247 THICK PEA GRAVEL BOTTOM Y O F _ id a=Pi - W a 4 WIDE TRAPIZ DAL BOTTOM 4• 0 0 260 7rnN ;gym -i O °�' 260 W 3 XI-_W VI W cvf z - - _ �o w rn¢_ 1ITAVEMENi _ _ GRADE ..�A O '1 o^ 6 w<m- ,§ oom0N ;«_W CREEK SECTION z50 M.'0'n N•N u WVK_ 250 e H N Z`�'iwvZ SCALE 1" a 5' H&V El <F--WWW < ZVIN 1 240 240 a 209 LF EXIST. 8" PVC 0 2.17E 0 23LF m is- C900 PVC 230 0 0.40E 230. • • `REMOVE EXISTING 8' CITY OF RENTON SEWER AND'PROVIDEBENCH MARK .... NEW 8'-PVC-AS SHOVM- RR SPIKE ON SE FACE OF POWER POLE 8• UP. SW INTERSECTION NE 20TH ST AND JONES AVE NE. z EL. 277.09 • 2+00 3+00 4+00 PROFILE SCALE 1" - 20•H • �l S — 2 1 0 9 0 L o g SOUTH 1/2 SECTION 5 TWP 23N R 5E Y All I N s° v n L _ I� > TAX LOT 1828 0 0 F. N ,NNO guFfc.R xi HOUSE #3201 y 0 // IrI�JI' EXISTING 15' WIDE / I I- 1 I v . REMOVE AND REPLACE EXISTING 0 -- M11.11.1‘E INGRESS/EGRESSTJOT 3202 FENCE WITHIN CONSTRUCTION Z ///. �.1 / / EASEMENT- ' H SE /1824 LIMITS. N r o 0 00,0 8 , U< ---- Z I N 0 / , 4 / GRASS ^t �Nw GRASS THIS EXISTING DITCH OR SWALE RESTORE LAWN AND LANDSCAPING IMPROVEMENT fI1 Q NRESTORE DISTURBED SWALE WITH IS APPROX. 8" TO 1' WIDE z E- // 7_,...---"" 5 HYDROSEEDING. INSTALL HAYBAIL 5 TO PRECONSTRUCTION CONDITION. PROVIDE NEW w T ORAINAG J W 24"7P,PPLE / I OR DAMS AT 15' INTERVALS e TOPSOIL AND S00 FOR ALL DISTURBED AREAS a --t rn L J I / INSTALL 5 r O a ° DAMAGED BY CONSTRUCTION, FOR THIS PARCEL COF ONLY TO NORTH EDGE OF ROADWAY ON NE Z 0 N TRENCH PLUG �' 20TH AVE. , a. W I REMO INSTALL 2 - 12" N a0 I c m FEN POST CDF t., o (' N F- dS (n I I 36" DECO / j DECID. t ` ) 12" FIR TRENCH PLUG N h! I w a0°1 Z 10 POPLARS N 0 g / �_ ^ -- v � REMOVE FENCE POST r5.0' lip 3 -1 1 y -- o et05 a > V w 8" PVC - �i•-. —__ - ri:;P,;;;['1 \mW _ A:ii•. NEW 8- SANITARY SEWER -�!P ' N6+00 DEC D7.0o NOD --�9+pp- ����� I � - t0*OQ - - Ss�HI - 11:9; o 0 J/ 1- R BA N / 1»:C13 10' PERMANENT co ^ Z Id/ I / BOREHOLE REMOVE JJ1// [ REMOVE 2 ID. ew < FENCE POST 15' PERMANENT FENCE POST EASEMENT N N J BH-3 BOREHOLE rn 5 W W EASEMENT BH-4 L. I- INSTALL U BERRIES 1 1 --- 3" ORNAMENTAL �F / L INSTALL HAYBAIL / SEE TRENCH PLUG ~ e 15' TEMPORARY Q 30' TEMPORARY CHECK DAM CONSTRUCTION 15CONSTRUCTION 4i0EASEMENTCONTRACTOR SHALL RESTORE DRAINAGE SWALES 5 mznIDEPTH, GRADE. AND ALIGNMENT TO THEIR RESPECTIVE 5 -3o / POHL SHORT PLAT NOTE: PRECONSTRUCTION CONDITION. THIS WORK SHALLHYDROSEEO ALL AREAS i i i I 'j i i N4.,z LOT 2 CONTRACTOR SHALL REMOVE ANDBE INCIDENTAL TO SEWER MAIN CONSTRUCTION. DISTURBED BY CONSTRUCTION GARAGE � � I I O oDISPOSE OF DECAYED BARN. THIS TAX LOT 3200 f. DECK1 . 1 7/)\ 1 / WORK SHALL BE INCIDENTAL TO I I HOUSE p8¢0 I � Z SEWER MAIN CONSTRUCTION. E"w li PLAN V Rr' a SCALE 1" 20' JONES AVE NE co C II o a - 280 280. N ;;M i• H 3 W W UT 270 N N 270 f0 - m N W < N rnw z W 3 $( z -a �, :g 260 it 0,0-.... 260 a 3 I�0 o Q EXIST. GRADE u M N I- 0 o N 250 ,.l W �I 250 Z_ �_ c o J 612 LE 8" C900 PVC 0 0.85% - -------ni U F---W4B 240 ce Q Q. a 230 230 0 L 6+00 7+00 8+00 9+00 10+00 11+00 OTY OF RENTON BENCH MARK PROFILE RR SPIKE ON SE FACE OF SCALE 1" - 20' H POWER POLE 8'UP. SW 1" 10'V INTERSECTION NE 207H ST AND JONES AVE NE. L. 277.09 z 0 VI ' S — 2 1 0 9 0 3 Z O m w N p N I� NOTE: N A I Li lialmp CENTERED IN EASEMENT TO - i NE 28T1� ST SOUTH_ 1 f2 SECTION_ 5 TWP . . p 5E .._. "-�-_ IfBh- O tiY3T+HG_tAi�N„OCf_ _ _� MANHOLE #1 SHALL BE PLACED IN CENTER OF -- - EASEMENT AS SHOWN. N / / T Z THE NEW 8" SANITARY SEWER FROM THE EXISTING Q Z N 1 MANHOLE IN JONES AVE NE TO NEW MH 1 MAY Qz f SKEW SLIGHTLY ACROSS THE 15' WIDE UTILITY Z • 1 W // f I / EASEMENT BASED UPON THE ACTUAL FIELD LOCATION [.,,,,__ 4 ,. OF THE EXISTING MANHOLE. ESTABLISH A STRAIGHT W /J 2 j ALIGNMENT TO MEET MH #1 WHICH SHALL BE m r 2 i J CENTERED IN THE 15'-WIDE UTILITY EASEMENT. LIJ 0 N W m a O I a o Q z v ^'— d1 TRACT 294 g' 1'5 L — e 7 N Z W W i TAX LOT 3602 O IE 244.52 INSTALL / TRACT 283 m n o m o m INSTALL IE 243.77 h Q CDF O / TAX LOT 3162 ~ I w w rc STA CDF H TRENCH PLUG V/ o n o p o p TRENCH PLUG w S � PROVIDE 15 LF 12" SD \� P z W UNDER NEW GRAVEL ACCESS Cal IE 243.77/ Z ROAD. f 2��A?7// I o u I I "' I I 36` CEDAR O r -EXISTING 15' WIDE UTILITY �/ w o w I �� % o o t2' DECID ♦ 7 EASEMENT AF GR. DR. ^: m n I BOREHOLE iO �f�-�} /I /I 1 CUT AND PATCH EXIST n �' BH-2 J // FURNISH AND INALL / N JO5 ( ; BOREHOLE DECID /� f I V 24" DECID r V / �, I\ 35LF 18' STEEL CASING BH-2 TREES J It z`W 1 CIECID _ CONNECT TO EXISTING MH V -r---- --ram -- '" y ri •-----AND RECHANNEL 24"DECID. I"�S rir�. ypp%���: •• 4.00 'e.11 x x10� BOREHOLE-1 /E 1 6 r Sf wti�.t`; II ir��:r; 374 LF " PVC \ _, NEW MANHOLE /t Q O 3 \ 244.45/' r SEMIER - 'S: r•C?: i -" \ { • 12 5"-8" I^ o L "�'� 30" DECO. 15" PERMANENT DECID m ZREMO - AM RIM 246.85AR4....: I I TREES _ \ 0 n \\ EASEMENT5'0HOUSEDM18281E—Ir"'a \ IE 237.00n NEW 6' HIGH CHAIN LINK INSTALL 24 DECID. 30" ALDER yt. \ REMOVE TREES U c REPLACE EXISTING 8" V •^ FENCE GATE - 14' WIDE /4 �F `30' TEMPORARY k'�T'p b TREN;,I PLUG ' - PVC STUB I z W n I SEE q1Y OF REN7pN \ CONSTRUCTION r90 �t VE FENCE POST Z STANDARD2 PLAN n003 /� \ EASEMENT Pp c z 3 - 30' 1\ IE 244.76 �, DECO. 5 4 li o OLD TRACT ' p POHL2 SHORT PLAT \ I a I II 293 I WETLAND BOUNDARY------ \ \ OLD TRACT 7A4 .r.-A-A-11/4-1 s MATCH LINE STA 5+60 SEE SHEET 3 - N 8919'41"E 610.06' 1 Alle i NE 20TH ST PLAN �ql5{ p, SCALE 1' . 20' -I_ I I Z d 9 Lc!N • "I 270 W - l< LO n. w,� •p : • 'n3+1n� W p SN C� r fn ZICNN 260 moo.. w -.. !<N3N - 1 1 1 Z+ . Q m Z�W W + U Z+^ _ _ 00 J N<N, �. w in� EXISTING GRADE I- ::: - Li en ' / 5 EXISTING 8" ((( :' _ ` W - 409 LF 8" C900 PVC•0.83x • V m `REPLACE EXISTING 8" 17 PVC STUB 35 LF 18" STEEL 230 CASING •0.83 S 230 • 1+00 2+00 3+00 4+00 5+00 z 0 PROFILE NOTE: CITY of RENTON a SCALE 1" 20•H NEW 8" PVC SHALL BE INSTALLED THROUGH BENCH MARK 1" . 10•V NEW 14" STEEL CASING. RR SPIKE ON SE FACE OF POWER POLE 8' UP. SW • INTERSECTION NE 20TH ST AND JONES AVE NE. EL. 277.09 S - 210902 cp 0 O e � i N CITY UFRENTON n- Z Q HIGATE LIFT STATION ELIMINATION z .., o = SOUTH 1 /2 SECTIO\ 5 TOW\ SHIP 23N , RANGE 5E a V) u U L I N 3 SHEET 2 W wZ N NEW 8" SANITARY__ SEWER '� PROJECT 0 ,• _ 405 LOCATION LAKE T 1 w • SEATTLE WASHINGTON t POHL SHORT PLAT a NE 207 ST PROJECT Oz s -4, z ; LOCATION O F W 3 -9� 0• Z •,"I Z I S NE 12TH ST �� ��� 900 LIJ M E-I W -Da' 2� RENTON ISSAQUAH RD > - w lir o 5 0‘,/,0 4�F j 'EN TON aMI W 49L Q Z I 1 C ) y a ■I o s a. I a TUKWILA Q RENTON = S j/, ^I CITY OF RENTON it R\90� \ BENCH MARK ii t/I,t 2ND f RR SPIKE ON SE FACE OF _ 'P POWER POLE 8' UP. H W �l INTERSECTION NE 20TH ST 69 AND .TONES AVE NE. NE 20TH ST _ 5 3RD �+ EL. 2n.o9 SHEET 4 $ — C�OAR RSV lfgp`�' - O EX 8" SAN. SEW. ` EX. 8" a i F? 1-44 EX. FORCE MAIN SAN. SEW. vl 1, C( F F 0 In _ t IT •• — •�ir RO IN OCDASENT EXISTING HIGATE 1/ INDEX TO DRAWINGS I SEWAGE PUMP STATION SHEET 1 VICINITY M'NP & INDEX TO DRAWINGS I — RENTON BERRY FARM J SHEET 2 PLAN & PROFILE a TUKWILA SHEET 3 PLAN Sc PROFILE a a SHEET 4 PLAN & PROFILE a a } SHEET 5 DETAILS AND SECTIONS co SITE MAP VICINITY MAP 1ANNING N.T.S. SHEET 6 DETAILS A.4D SECTIONS N.T.S. LcWE REN-TOS �E� p a 2000 cry 0 o ED RECOMMENDED FOR APPROVAL WASTEWATER UTILITY DATE UTILITY SYSTEMS DIRECTOR DATE o S - 210901 Z MAINTENANCE SERVICES DIRECTOR OATS VP se q9-oS6 HILLEGAS CLYDE W KAISER GERALD R+KRISTEN L ELDRIDGE DEBORAH H STEEDMAN SHAARI L 1700 MONTEREY CT NE 1708 MONTEREY CT NE 1632 MONTEREY CT NE RENTON WA 98056 RENTON WA 98056 RENTON WA 98056 STUART ROBERT A+CATHERINE 0 ROY JOANNA S HUMPHREY MARK J 1716 MONTEREY CT NE 1724 MONTEREY CT NE 1725 MONTEREY CT NE RENTON WA 98056 RENTON WA 98056 RENTON WA 98056 CORWIN ROBERT C+JOYCE TAKASHIMA KIYOKO RIPLEY JOHN I+CONSTANCE B 1717 MONTEREY CT NE 1709 MONTEREY CT NE 4310 85TH AVE NE RENTON WA 98056 RENTON WA 98056 MERCER ISLAND WA 98040 SUNSET HILLS HOA DUNCAN WILLIAM L DELAPP DERRELL&ISABELL C/O JOEL T HUFF 1619 KENNEWICK AVE NE 2409 KENNEWICK AVE NE 2421 KENNEWICK AVE NE RENTON WA 98056 RENTON WA 98056 RENTON WA 98056 WOLF DELORIS J BROOKS CARL E MINKLER ROBERT J 2415 KENNEWICK AVE NE 2414 KENNIWICK PL NE 1701 KENNEWICK AVE NE RENTON WA 98056 NEWCASTLE WA 98056 RENTON WA 98055 COWAN JACK L+BETTY COWAN JOHN DINKINS VERONICA B+STEVEN J 905 LYNNWOOD AVE NE 1830 NE 24TH 2413 KENNEWICK PL NE RENTON WA 98056 RENTON WA 98056 RENTON WA 98056 TYLER JERRY ALLEN SR+BEVERL KARTES CRAIG J+KATHRYN D BUCK GARY R+M STACY 2419 KENNEWICK PL NE 2418 KENNEWICK AVE NE 2412 KENNEWICK AVE NE RENTON WA 98056 RENTON WA 98056 RENTON WA 98056 QUACH CHAU V+MARIA P ZETTERBERG KEVIN+BARBARA BAKKO JOHNNY R 2406 KENNEWICK PL NE 2400 KENNEWICK AVE NE 1922 NE 24TH ST RENTON WA 98058 RENTON WA 98058 RENTON WA 98055 MCKENZIE DONALD R LARSON JERRY 0 WILGUS MICHAEL R 2424 MONTEREY NE 2418 MONTEREY AVE NE 2412 MONTEREY AVE NE RENTON WA 98056 RENTON WA 98055 RENTON WA 98056 PO TSANG W AMICK DUANE W+PATRICIA M HANSON JAMES R+MARGARET L 13707 NE 6TH PL#A2-202 1601 NE 24TH ST 2225 JONES AVE NE BELLEVUE WA 98005 RENTON WA 98055 RENTON WA 98055 2-°I -'9 OF ,P*� Psi*� B‘ Ott ,1‘ 4 .114 ,1‘� AUNGER STUART L+JUDITH I HUYNH TU PHUONG RATRAY R N 2224 HIGH AVE NE 2300 HIGH AVE NE 2301 JONES AVE NE RENTON WA 98056 RENTON WA 98056 RENTON WA 98055 ULRICH MARTIN J PRESTON VIRGINIA C STEWART KENNETH JACKSON JR 2209 JONES AVE NE 2217 JONES AVE NE 2132 HIGH AVE NE RENTON WA 98056 RENTON WA 98056 RENTON WA 98055 CHAVIS LYNN A BRENDEMIHL FRITZ W ULRICH DANIEL E+CAROL C 2216 HIGH AVE NE 2116 HIGH AVE NE 2125 JONES AVE NE RENTON WA 98056 RENTON WA 98056 RENTON WA 98055 SPARROW WILLIAM M HOLT ESTHER L WEI LUANN KIM 2115 JONES AVE NE 2124 HIGH AVE NE 2033 JONES AVE NE RENTON WA 98056 RENTON WA 98055 RENTON WA 98056 JANE RUTH D QUINCEY ALEXANDER V& MARY SCHUMSKY DONALD 2100 HIGH AVE NE 2025 JONES AVE NE 2019 JONES AVE NE RENTON WA 98055 RENTON WA 98056 RENTON WA 98055 DOBSON WYMAN FANNING GEORGE A WIEHOFF CHARLES A&MARY E 821 N 1ST ST 2021 JONES AVE NE 1708 KENNEWICK AVE NE RENTON WA 98055 RENTON WA 98056 RENTON WA 98056 HAWKEN LEONA ANN BANES DENNIS R SWANSON ELSIE C 1917 JONES AVE NE 1909 JONES AVE NE PO BOX 2352-0352 RENTON WA 98056 RENTON WA 98056 1625 KENNEWICK AVE NE RENTON WA 98056 JORGENSEN J J PORCELLO ANTHONY J LEMON LUCIEN W 1901 JONES AVE NE 1817 JONES AVE NE 1801 JONE AVE NE RENTON WA 98055 RENTON WA 98056 RENTON WA 9So SPENCER GENEVIEVE BISBEE JOSEPH D+IRENE H SMITH DARRYL J 1809 JONES AVE NE 1725 JONES AVE NE 1733 JONES AVE NE RENTON WA 98056 RENTON WA 98056 RENTON WA 98055 MEADOWS DARYL+CATHLEEN PENNEY ELMER C JR DANIELS JAMES+JEAN 1633 JONES AVE NE 1625 JONES AVE NE 1707 JONES AVE NE RENTON WA 98056 RENTON WA 98055 RENTON WA 98056 ctisw ,Plislc I 0 P1114 P" ,0 V� P" Olt , t).P1114 ®09IS .iasei siagei ssaippy @AU3AH BARKER SHARON A BUTCHER ROBERT J MORELLI F JOHN 2414 JONES AVE NE 2422 JONES AVE NE 1726 NE 24TH ST RENTON WA 98056 RENTON WA 98056 RENTON WA 98056 DIER ROBERT EDWARD BITNEY DEAN+JO WILLIAMS RODNEY N& DIANE A 1732 NE 24TH STREET 2727 MOUNTAIN VIEW AVE NORTH 2402 JONES AVE NE RENTON WA 98056 RENTON WA 98056 RENTON WA 98056 TAYLOR LORRAINE CODIGA MARIE BARTELL ROBERT H+ALINA M 2208 JONES AVE NE 2216 JONES AVE NE 1725 NE 24TH ST RENTON WA 98056 RENTON WA 98055 RENTON WA 98055 SWALKO MARK A POHL CHARLES A&WINIFRED K EGAN E JOHN 2010 JONES AVE NE 2004 JONES AVE NE 2100 JONES AVE NE RENTON WA 98056 RENTON WA 98056 RENTON WA 98056 SUNDBY DOUGLAS P ARENS ROBERT F SCHWAB LAURA M 1700 NE 20TH 1703 NE 20TH ST 1706 KENNWICK AVE NE RENTON WA 98056 RENTON WA 98055 RENTON WA 98056 TOMCHICK JOHN A+LAUREL S CLARE D F JOHNSON RONALD ROGER 1900 JONES AVE NE 1818 JONES AVE NE 1824 JONES AVE NE RENTON WA 0 RENTON WA 98056 RENTON WA 98056 SKELLENGER LOIS SMITH DARRYL J COLOMBI LOUIE F+MARGUERITE 1806 JONES AVE NE 1733 JONES AVE NE 1800 JONES AVE NE RENTON WA 98055 RENTON WA 98056 RENTON WA 98056 HUEBNER ROBERT F LUNSFORD LARRY M+SUSAN ESPEY CAROL 1700 JONES AVE NE 1716 JONES AVE NE 1624 JONES AVE NE RENTON WA 98056 RENTON WA 98056 RENTON WA 98056 NGUY TRUNG KIEN LUNSFORD LARRY M+SUSAN KINZER DARRELL#13716 1720 NE 16TH ST 1716 JONES AVE NE %EXECUTIVE HOUSE INC RENTON WA 98056 RENTON WA 98056 7517 GREENWOOD AVE N SEATTLE WA 98103 UNBEDACHT JEFFREY B+CHARLYN BROWNFIELD KEITH W+DEBBIE A CORE DOUGLAS C 2120 JONES AVE NE 22021 SE 29TH PL 1828 NE 20TH RENTON WA 98056 ISSAQUAH WA 98027 RENTON WA 98055 ®O9L5 Jo)a2e1dwa1 asil wls;aays peaj y;oows xia igo wp 4. p m m .c .4 4. p 4. w 4. p m m 4. p t p 4. V? m m t V;) 4. p inm I IMM ®09IS easel siagel ssaippy ®A213AV DENZLER CHRISTIAN R KUBOTA HISAKO LONG ROCHELLE T+ERIC C 1800 NORTHEAST 20TH STREET 1702 KENNEWICK AVE NE 4131 BROOKLYN AVE NE RENTON WA 98056 RENTON WA 98055 SEATTLE WA 98105 CAVE ROBERT N BLUNDRED JAMES C JR LAPLANT HOWARD H& MURIEL E 12518 S E 17TH ST 1800 NE 24TH ST 1917 NE 24TH ST BELLEVUE WA 98005 RENTON WA 98056 RENTON WA 98055 ROWE CHARLES J ZIRK LEOMA J LANDE-SHANE MARY DARLENE 1909 NE 24TH ST 1833 NE 24TH ST 9037 38TH AVE SW RENTON WA 98055 RENTON WA 98056 SEATTLE WA 98126 TORBENSON WILLADENE M BLONSKI MICHAEL D CHAMBERLAIN TIMOTHY 1836 NE 20TH ST/P 0 BOX 201 1908 NE 20TH 1832 NE 20TH RENTON WA 98057 RENTON WA 98055 RENTON WA 98056 BRAY JULIE E NELSON JAMES A FINNICUM DAINIE H+BEULAH I 14138 34TH PL S 1905 NE 20TH ST 2001 NE 20TH ST SEATTLE WA 98168 RENTON WA 98056 RENTON WA 98056 VANCE CHRISTINE B VANCE BRIAN D DAY SHIRLENE R 2129 ABERDEEN AVE NE 13811 SE 173 PL 1932 NE 20TH ST RENTON WA 98056 RENTON WA 98058 RENTON WA 98056 REDFERN RICHARD C WEIGEL VIVIAN A ISLER JAMES L 2000 NE 20TH ST 16853 SE 112TH STREET 1912 NE 20TH ST RENTON WA 98056 RENTON WA 98059 RENTON WA 98055 JELLEY ISAAC N GRANT GEORGE K CARR MARK S+CARR,MICHAEL L 2009 NE 24TH ST 2425 JONES AVE NE 2309 ABERDEEN AVE NE RENTON WA 98055 RENTON WA 98056 RENTON WA 98056 WATSON MICHAEL DOUGLAS BENNETT RONALD D+JANE M HARRISON VIOLA M 1929 24TH ST NE 2421 MONTEREY AVE NE 2417 MONTEREY AVE NE RENTON WA 98055 RENTON WA 98056 RENTON WA 98056 SMITH RONALD L OLIVER JON A+SUSANNE E ROHDE DON B 2427 ABERDEEN NE 2409 ABERDEEN AVE NE 2401 ABERDEEN AVE NE RENTON WA 98055 RENTON WA 98056 RENTON WA 98055 ®091 S Jai apidwai asn rusieags Peal q oows WO p 4. w m m 4 4. p 4. p m m �c 7) 4. �� m { 4. pm m < fpin DG mpl ‘. Wp m ➢ n!%._ Dn ®09ZS Jasei siagei ssaippy ®A213AV RALLISON STEPHEN F+PATRICIA DYMARKOWSKI DANIEL B THORNTON ALAN H 2016 NE 24TH ST 2020 NE 24TH 1901 NE 17TH PL RENTON WA 98056 RENTON WA 98055 NEWCASTLE WA 98056 CLAYPOOL SANDRA L+GOLDIE RIEKER GERALD L&SOUNG HEE HILL JAY G 2325 ABERDEEN AVE NE 11017 101ST PL NE 2417 JONES AVE NE RENTON WA 98059 KIRKLAND WA 98033 RENTON WA 98055 SALAVEA MALU WIEHOFF RONALD W+ALVERNA J CARR MARK S+CARR,MICHAEL L 1907 NE 17TH PL 1612 KENNEWICK AVE NE 2309 ABERDEEN AVE NE RENTON WA 98055 RENTON WA 98056 RENTON WA 98056 WOODWORTH J M COLLINS WILLIAM V OLSON STANLEY 1624 KENNEWICK AVE NE 2201 ABERDEEN NE 2217 ABERDEEN AVE NE RENTON WA 98055 RENTON WA 98055 RENTON WA 98056 HUGHES HARRY B+JANICE J SAYRE M E ROUTSON RICHARD E+MARLENE J 2213 ABERDEEN AVE NE 2005 ABERDEEN AVE NE 460 MT JUPITER DR SW RENTON WA 98056 RENTON WA 98056 ISSAQUAH WA 98027 ROBERTO PATRICIA R JOHNSTONE LINDSEY N+KATHLEE ARCHER D 0 2123 ABERDEEN AVE NE 2119 ABERDEEN AVE NE 2127 ABERDEEN AVE NE RENTON WA 98056 RENTON WA 98056 RENTON WA 98056 GIBSON CHARLES E LARSEN MARIE L DAVIS MICHAEL 2008 NE 20TH ST 2006 NE 20TH ST 2020 NE 20TH RENTON WA 98056 RENTON WA 98055 RENTON WA 98055 BISIACK ANTOINETTE B MOORE ROSEMARY T+DAVID R ODREN MICHELE K+MULLEN 2101 ABERDEEN AVE NE 2025 ABERDEEN AVE NE JAME RENTON WA 98056 RENTON WA 98056 2030 NE 20TH ST RENTON WA 98056 ALDER BETTY A GREEN BERLE BOSTROM THOR+KARLA 1829 ABERDEEN AVE NE 1831 ABERDEEN AVE NE 1809 ABERDEEN AVE NE RENTON WA 98056 RENTON WA 98056 RENTON WA 98056 VIG GARY DEAN+JULIANNE REED MOTE KERMIT+RAUB,VICKI L WOODIN HAROLD 1833 ABERDEEN AVE NE 1901 ABERDEEN AVE NE 1801 ABERDEEN AVE NE RENTON WA 98056 RENTON WA 98056 RENTON WA 98056 ®09L5 Joj aleidwal asn w±siaags paa,j gioows I p D m m , p D ps m m mV? m P m 4 4 V) In V m 4 P m m 00915 Jasel siagel ssaippy ®A213AV GREEN BERLE BRODKA HELMUT GLOCKNER EILEEN 1831 ABERDEEN AVE NE 12602 SE PETROVITSKY RD 1927 ABERDEEN AVE NE RENTON WA 98055 RENTON WA 98058 RENTON WA 98056 GUSTAFSON SONJA G HILLEGAS CLYDE W BECKWITH A K 1933 ABERDEEN AVE NE TAX TITLE CONT. 16688 1733 ABERDEEN AVE NE RENTON WA 98056 1632 MONTEREY COURT NE RENTON WA 98056 RENTON WA 98056 BECKWITH A K COCHRAN JILLENE NOLL ZITA M 1733 ABERDEEN AVE NE 1709 ABERDEEN AVE NE 1701 ABERDEEN AVE NE RENTON WA 98056 RENTON WA 98056 RENTON WA 98056 CHRISTENSON CHARLES D COOPER LAWRENCE E H+COOPER PUDLO EDWARD J+JOAN KARLA A 1700 MONTEREY AVE NE 1706 MONTEREY AVE NE 1712 MONTEREY AVE E RENTON WA 98055 RENTON WA 98056 RENTON WA 98056 SWIHART MARK A+WENDY R MARTIN LARRY E+CHERIE L STOKES DUANE R+ANDERSON 1718 MONTEREY AVE NE 1802 MONTEREY AVE NE KAT RENTON WA 98056 RENTON WA 98056 1808 MONTEREY AVE NE RENTON WA 98056 CREEGAN MICHAEL P MCKILLOP STEPHEN V HAUTALA JEFF A 517 SMITHERS AVE S 1820 MONTEREY AVE NE 1904 MONTEREY AVE NE RENTON WA 98055 RENTON WA 98056 RENTON WA 98056 VALENTINE PATRICK S R MIKO LARRY H HANADA RONALD D&MARIE S 1915 MONTEREY AVE NE 1909 MONTEREY AVE NE 14409 148TH PL SE RENTON WA 98056 RENTON WA 98056 RENTON WA 98059 SCHUEHLE RYAN WILLIAM+KIRST WOOD SAM L RIDER SUSAN E 1908 NE 19TH PL 1902 NE 19TH PL 1835 NE 20TH RENTON WA 98056 RENTON WA 98056 RENTON WA 98056 MOFFAT GARY S RUSTAD TIGE R+ST ICHLING MO HUI FERNANDO&NANCY 1903 NE 19TH PL 1909 NE 19TH PL • 2105 96TH AVE NE RENTON WA 98055 RENTON WA 98056 BELLEVUE WA 98004 COPPESS MICHAEL D+LAURA L MITCHELL BRIAN A STEVENS CAMERON ETAL 12119 SE 13TH ST 1801 MONTEREY AVE NE 1721 MONTEREY AVE NE BELLEVUE WA 98005 RENTON WA 98055 RENTON WA 98055 ®09L5 Jo)a;eidwai asn w jslaags Rai q oows Mi3Ad V4 MIS nd V? MIaA\1 T? MO°;f VI /al3nd Cil? mia^' MOA\I Te MOA\f "? MI3/‘d MOA\1 Smooth Feed SheetsTM Use template for 5160® COMBS GARY N BAKER ROBERT G+CONNIE E JANES RICHARD W 1715 MONTEREY AVE NE 1709 MONTEREY AVE NE 1906 NE 17TH PLACE RENTON WA 98056 RENTON WA 98056 RENTON WA 98056 MILLICAN PAUL E&ROSALINDA TORKELSON KENNETH A MACKENZIE BONNIE J+ESTHER M 1826 NE 17TH PL 1820 NE 17TH PL 1817 NE 17TH PL RENTON WA 98056 RENTON WA 98056 RENTON WA 98056 THORNHILL DOUGLAS+PATRICIA 1823 NE 17TH PL RENTON WA 98056 6 AVERY® Address Labels Laser 5160® wort (6• 6 AVER' et6i AVERY 6 mewl obi AVER( gi welly I bs wetly as AVERY wort 6$ 6 rn o > Ts s li t N CITYOF RENTON� Z Q 4 HIGATE LIFT STATIONELIMINATION 0 id SOUTH 1 2 SECTIO\ 5, TOW\ SHIP 23N SAN G - 5E rN � s , t n , r N SHEET 2 I. PROJECT O NEW 8` SANITARY SEWER • LAKE v 405 LOCATION SEATTLE WASHINGTON w i: • POHL SHORT PLAT g 0 -NE:20' ST PROJECT Gz44 s ��/4,/ Ru. .'..• • LOCATION QQ o FAQ W / (~ 3 qL QY V z �` 900 M s / N 1TH sr�c-� RENTON ISSAQUAH RD Q w F Lu co A� 'EN TON Q V) N o 9 Y W el c ‘5"‘ d Q O I > REN TON TUKWILA Q / S 1%, _ ii'1 , CITY H RENTON , R-900 �.'' BENCH MARK - 2ND ` S'.p RR SPIKE ON SE FACE OF POWER POLE 8� UP. SW /''''� ,6+ INTERSECTION NE 20TH ST �j / 3RD `9 AND JONES AVE NE. Y c �,� EL. 2».09 NE 20TH ST SHEET 4 F0qR Ri 11,gp��' O EX. 8` SAN. SEW. • O EX. 8` c ,?_1 �R g4zeY� EX. FORCE MAIN F _ F -SAN. SEW. $ _ - O�� J _ = 405 INDEX TO DRAWINGS N«CASENT EXISTING HIGHGATE SEWAGE PUMP STATION i 5 RENTON SHEET 1 VICINITY MAP & INDEX TO DRAWINGS i i - — ¢ ®3 �o SHEET 2 PLAN & PROFILE BERRY FARM ce 0. a. TUKWILA SHEET 3 PLAN & PROFILE SHEET 4 PLAN & PROFILE i o SHEET 5 DETAILS AND SECTIONS SITE MAP VICINITY MAP N.T.S. SHEET 6 DETAILS AND SECTIONS N.T.S. z 0 RECOMMENDED FOR APPROVAL WASTEWATER UTSJ TY DATE UTILITY SYSTEMS DIRECTOR DATE O c Z MAINTENANCE SCRNCES DIRECTOR DATE S — 2 1 090 1 .) Q\y�v ��\<e(8. ( Q � Stirs nil Irn Ti MIIII' �� j ! ? . .mu.. , al�m�tl���■ I mum EmuI �����r1111�::.t 11111! 11m aal," i .■i: lI 14-` E '— rIi:111�::■I1 ,I 1 ■■..-u. �.. ■ ■N .. .- .. 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Planning/Building/Public Works _J < ION.* . , 1055 South Grady Way - Renton Washington 98055 11.1 H FEB 16'0 0 0 3 Q 5 1i.1 F1p7ER i ADDRESS SERVICE REQUESTED 7CC a Ppfa 1U.S. POSTAGE • STEWA KENNETH JACKSON JR ,.,b1GH AVE NE 980-� RENTON WA 5TEW132 980562028 1C98 19 02/19/00 FORWARD TIME EXP RTN TO SEND STEWART UR 74070 MOCKINGBIRD TRL PALM DESERT CA 9260 -5601 �� �...�,�y; j s j s { RETURN TO SENDER+ j i F i i j i j !i i Setr Fno ••'+ illi 11:tiilfilitimittliiiilf HIM Itlilulihitliti E}fliflttiilililt13i1ilillitii a © CITY OF RENTON LQ '-.- Planning/Building/Public Works J � '� M # 1055 South Grady Way - Renton Washington 98055 W FEB 6°0 0 v�eLcasza Q ,3 Q 5 • ac * ADDRESS SERVICE REQUESTED moo'' jg MEYER U.S. POSTAGE 2010 JONES SWALKO MARK A AVE NE RENTON WA 9f SWAL010* 980562039 1598 19 02/19/00 RETURN TO SENDER SWALKO 'MARK MOVED LEFT NO ADDRESS UNM LE YU FURWMND RETURN TO SENDER S 8 V=a'S.9..?Wm e 9 88 5 6 1Iii4liiiiiillfFilliiiikiiiinlillti'.11iiifl!I!'iliilifiiitiii d p CITY OF RENTON 4F- .. 3 " Planning/Building/Public Works 6 V� 411 fE81600 �.45! * 1055 South Grady Way - Renton Washington 98055 W «� 0 .3 0 .. "* METER * ADDRESS SERVICE REQUESTED % A. pD 77115840i, U.S. POSTAGE i \ i! j LONG ROCHELL- +ERIC C 4131 BROOKL ' AVE NE SEATTLE 98105 __ lcslifitirerai 11,1„1„1,11„„„1t1„1,1„,11,1 l:ili„l:IIiillitiiii„liiiiiilli,i„iiiill,iii 0 © CITY OF RENTON am& x__„` ,:,. ; Planning/Building/Public Works J 1"f„y 01 1055 South Grady Way - Renton Washington 98055 coy FEB 4 6'O 0 ✓r� ~ 0 , 0 Q � # '' O ADDRESS SERVICE REQUESTED a'4 i• 7158401, U.S. POSTAGE O u' I. PRSRI FIRST-CLASS SEA Wk 941,;' l,T •�kla.1 e e dr +nv1 Q ��CYBir A eh 4/0 P4S 1 � /\ O NO s, p190' O Ae,A aar s 19 PD TSA G w PL#A2- 02 O �° >,°h s!r N t 04,E 13101 NE 6TH 9800 O/30 cee,9Qiq'vit, N�"' 13ELLEVUE WA , e O -"'�b 8°a N �� Oue "" 'Icr%ss inn, ,, !<BlE —._ , AS At7;.: ;::>5ED 1 a33 ai W 4. RETURN TO SENDER y co 6ti,� Wd ,4 13'� r {{,1,�1„{,I{,,,,{,{„I,f,,,l{,{ f,f,f„f,f,,,ff„,f,f„ff,„f,f,f,f„1,1,i�,�,l' 114 „ © CITY OF RENTON "-" -"'Z , ' asAL Planning/Building/Public Works = a � vit 1055 South Grady Way - Renton Washington 98055 W N FEB 16'0 0 �agxEm� �'� _ 0 ,3 0 5 ADDRESS SERVICE REQUESTED ” 840i U.S. POSTAGE BAKKO JOHNNY R 1922 NE 24TH ST 98055 RENTON WA A3 AUU};'SSED C. -� ©3d tillUrrIAC LE . ,=CRWARD .- Wd RETURN TO SENDER ti,,/ ZA- 1S�U fi �;kgk`. Iitlttlttitllttttltlttltltttllutltittlltt,ltitltlitltltttlltl .....-..._ . , 2 .. .... . e . -••• , : , • . • • . ..: I. . . t -' • - : - t ' • —v Iii,, , .. . 4.,i i . — , r ,...,„....s.i..,, • ,,tilk,,f..i;..ts.; d © CITY OF RENTON 'F- Vm , J , IA Planning/Building/Public Works 4 a �� � �+ z _i1055 South Grady Way - Renton Washington 98055 • w y F�6 t( 'oo [E0 3 0 5 * ADDRESS SERVICE REQUESTED IL A. • cc iS 715840j U.S. POSTAGE j * N -0r10 61n P.k.ct 1._. 1901 NE 17TH PL NEWCASTLE WA 98C" THOR9O1'* 980562039 1199 19 O2/19/OO RETURN TO SENDER TI--0ORTON' ALAN MOVED LEFT NO ADDRESS UNABLE TO FORWARD RETURN TO SENDER I I ( 1 1 I1111 1 ' t 11 1 / ' I I% _ - IIl / ■ , 11rniaaasa r, I immirmgm____—_-.. Aug Inn I ___ ST .%upIIIIits: ■�•Illog , i I § ■ ■■ M■ �� IIF' ■� ■_rr Mil nip MIN I �u!■■ IIi ■ ■�� ■■1 ■ni 2■■■■■ .- I I 1 J---.1 Y _ ■ :; -%�■■■■■ NE ■ E. ‘nlINIIIN EMI I I 111 EN rinium 6 1 PROJECT- iu"i ■1111111� I 2 SITE I - ��i 11���1= 1 f ' 1 in= - a Moo i in 1 E. 1 T-2Oth II�■E■ 1:1 0,til ma ■ii 11■ N "ME -II I I ■ 11■ iii1■111■ ■� um ■— - ■ ■ ■� NNE nil • "Ul Ir. mourpi‘g awl PIONSmo. slitili fv‘ im 11 ginb la ..111 - i 64, gl: Ail cm pi O % si • LI! 11E7 is I ±4h i■ ■■ ■ r 2 i ‘111 ‘1 V I -1 - 0 1 7 J-._m____' 1 , _ '--- ,k - :iiu - NMEIEM N p�-toN 1NG o HIGATE LIFT STATION ELIMINATION va o q 2S100 VICINITY MAP ckeGE1v�G crei G I°--)nn, CITY OF RENTON MEMORANDUM Date: April 3, 2000 To: John Hobson/Utilities Department From: Lesley Nishihira/Development Planning Subject: Higate Lift Station Project No. LUA-99-088,ECF This letter is written on behalf of the Environmental Review Committee (ERC) and is to advise you that the comment and appeal periods have ended for the Environmental Review Committee's (ERC) Determination of Non-Significance - Mitigated for the above-referenced project. No appeals were filed on the ERC determination. This decision is final and application for the appropriately required permits may proceed. The applicant must comply with all ERC Mitigation Measures. If you have any questions or desire clarification of the above, please call me at(425)430-7270. finalmemo 4 CITY RENTON „IL Planning/Building/Public Works Department Jesse Tanner,Mayor Gregg Zimmerman P.E.,Administrator March 9, 2000 Washington State Department of Ecology Environmental Review Section PO Box 47703 Olympia,WA 98504-7703 Subject: Environmental Determinations Transmitted herewith is a copy of the Environmental Determination for the following project reviewed by the Environmental Review Committee (ERC)on March 7, 2000: DETERMINATION OF NON-SIGNIFICANCE-MITIGATED HIGATE LIFT STATION ELIMINATION LUA-99-088,ECF The Utilities Division of the P/B/PW Department is proposing to eliminate the Higate sewer lift station and replace it with a gravity sewer system. The project site consists of two existing City held easements totaling 30 feet in width (15-foot wide utility easement&overlying 30-foot wide construction easement),which cross three separate properties. The site is designated Residential—8 dwelling units per acre (R-8)on the City of Renton's Zoning Map. The proposed use of the site, as a"small utility," is considered an outright permitted use in the R-8 zone. The new 8-inch gravity sewer line will extend north from NE 20th Street for 646 feet, then turn west at a right angle. The line is proposed to continue west for 440 feet where it will connect to an existing sanitary sewer manhole located in Jones Avenue NE. The project also includes the placement of four new sewer manholes as well as the restoration of disturbed areas (vegetation and asphalt). Approximately 814 linear feet of the proposed sewer line would be located within a Category 2 wetland and its 50-foot buffer. A modification to the wetland regulations has been requested in order to allow the proposed activity in wetland and wetland buffer areas, thereby exempting the project from wetland compensation requirements. Location: 1800 NE 20th Street and 2010 & 2120 Jones Avenue NE. Appeals of the environmental determination must be filed in writing on or before 5:00 PM March 27, 2000. Appeals must be filed in writing together with the required $75.00 application fee with: Hearing Examiner, City of Renton, 1055 South Grady Way, Renton, WA 98055. Appeals to the Examiner are governed by City of Renton Municipal Code Section 4-8- 11 B. Additional information regarding the appeal process may be obtained from the Renton City Clerk's Office, (425)430- 6510. If you have questions, please call me at(425)430-7270. For the Environmental Review Committee, Lesley Nishi ra Project Manager cc: King County Wastewater Treatment Division Larry Fisher, Department of Fisheries David F. Dietzman, Department of Natural Resources Don Hurter, Department of Transportation Eric Swenson, Seattle Public Utilities Duwamish Tribal Office Rod Malcom, Fisheries, Muckleshoot Indian Tribe (Ordinance) Joe Jainga, Puget Sound Energy agencyltr\ 1055 South Grady Way-Renton,Washington 98055 �a_.. AFFIDAVIT OF PUBLICATION Charlotte Ann Kassens first duly sworn on oath states that he/she is the Legal Clerk of the SOUTH COUNTY JOURNAL 600 S. Washington Avenue, Kent, Washington 98032 a daily newspaper published seven (7) times a week. Said newspaper is a legal NOTICE OF ENVIRONMENTAL newspaper of general publication and is now and has been for more than six months DETERMINATION ENVIRONMENTAL prior to the date of publication, referred to, printed and published in the English language REVIEW COMMITTEE continuallyON as a dailynewspaper in Kent, KingCounty, Washington. The South CountyRENTON,WASHview Committee Y 9 The Environmental Review Committee Journal has been approved as a legal newspaper by order of the Superior Court of the (ERG)has issued a Determination of Non- State of Washington for King County. Significance-Mitigated for the following pro- ject under the authority of the Renton The notice in the exact form attached, was published in the South County Municipal Code. Journal (and not in supplemental form) which was regularly distributed to the subscribers HIGATE LIFT STATION ELIMINATION duringLthe below statedperiod. The annexed notice, a Environmental UA 99 088,ECF E review to eliminate the Higate sewer lift station and replace it with Higate Lift Station Elimination a gravity sewer system. Location: 1800 NE 20th St. and 2010 and 2120 Jones Ave. NE. as published on: 3/13/00 Appeals of the environmental determina- tion must be filed in writing on or before The full amount of the fee charged for said foregoing publication is the sum of$40.25, filed inP March og27, ther200 with the eqmuut be 9 9 9 filed in writing together with the required charged to Acct. No. 8051067. $75.00 application fee with: Hearing Examiner, City of Renton, 1055 South Grady Way,Renton,WA 98055.Appeals to Legal Number 7307 the Examiner are governed by City of Renton Municipal Code Section 4-8-11B. Additional information regarding the appeal process may be obtained from the Renton City Clerk's Office,(425)430-6510. to al Clerk 0 h Co tyJournal Published in the South County Journal g � March 13.2000.7307 Subscribed and sworn before me on this NOA.t.k ay of 2000 ``�o�ce..•.corqf !. . :fit. ,,. i (171' Xl��. r \ � ��'� t,CTARy 's tYjM- - i = Notary Public of the State of Washington ..o P1'2.L'o O:. ; residing in Renton ;;VNlq FC 2 6 Zo. a-,�.� King County, Washington NOTICE OF ENVIRONMENTAL DETERMINATION ENVIRONMENTAL REVIEW COMMITTEE RENTON, WASHINGTON The Environmental Review Committee (ERC) has issued a Determination of Non-Significance-Mitigated for the following project under the authority of the Renton Municipal Code. HIGATE LIFT STATION ELIMINATION LUA-99-088,ECF Environmental review to eliminate the Higate sewer lift station and replace it with a gravity sewer system. Location: 1800 NE 20th St. and 2010 and 2120 Jones Ave. NE. Appeals of the environmental determination must be filed in writing on or before 5:00 PM March 27, 2000. Appeals must be filed in writing together with the required $75.00 application fee with: Hearing Examiner, City of Renton, 1055 South Grady Way, Renton, WA 98055. Appeals to the Examiner are governed by City of Renton Municipal Code Section 4-8-11B. Additional information regarding the appeal process may be obtained from the Renton City Clerk's Office, (425) 430-6510. Publication Date: March 13, 2000 Account No. 51067 dnsmpub.dot CITY OF RENTON DETERMINATION OF NON-SIGNIFICANCE (MITIGATED) APPLICATION NO(S): LUA-99-088,ECF APPLICANT: City of Renton; Utilities Division (John Hobson) PROJECT NAME: Higate Lift Station Elimination DESCRIPTION OF PROPOSAL: The Utilities Division of the P/B/PW Department is proposing to eliminate the Higate sewer lift station and replace it with a gravity sewer system. The project site consists of two existing City held easements totaling 30 feet in width (15-foot wide utility easement&overlying 30-foot wide construction easement), which cross three separate properties. The site is designated Residential-8 dwelling units per acre (R-8)on the City of Renton's Zoning Map. The proposed use of the site, as a"small utility," is considered an outright permitted use in the R-8 zone. The new 8-inch gravity sewer line will extend north from NE 20th Street for 646 feet, then turn west at a right angle. The line is proposed to continue west for 440 feet where it will connect to an existing sanitary sewer manhole located in Jones Avenue NE. The project also includes the placement of four new sewer manholes as well as the restoration of disturbed areas (vegetation and asphalt). Approximately 814 linear feet of the proposed sewer line would be located within a Category 2 wetland and its 50-foot buffer. A modification to the wetland regulations has been requested in order to allow the proposed activity in wetland and wetland buffer areas, thereby exempting the project from wetland compensation requirements. LOCATION OF PROPOSAL: 1800 NE 20th Street and 2010 &2120 Jones Avenue NE LEAD AGENCY: City of Renton Department of Planning/Building/Public Works Development Planning Section The City of Renton Environmental Review Committee has determined that it does not have a probable significant adverse impact on the environment. An Environmental Impact Statement (EIS) is not required under RCW 43.21 C.030(2)(c). Conditions were imposed as mitigation measures by the Environmental Review Committee under their authority of Section 4-6-6 Renton Municipal Code. These conditions are necessary to mitigate environmental impacts identified during the environmental review process. Appeals of the environmental determination must be filed in writing on or before 5:00 PM March 27, 2000. Appeals must be filed in writing together with the required $75.00 application fee with: Hearing Examiner, City of Renton, 1055 South Grady Way, Renton, WA 98055. Appeals to the Examiner are governed by City of Renton Municipal Code Section 4-8- 11 B. Additional information regarding the appeal process may be obtained from the Renton City Clerk's Office, (425)430- 6510. PUBLICATION DATE: March 13, 2000 DATE OF DECISION: March 7, 2000 SIGNATURES: n7/C‘) ,(-2 ‘ / Gjdrninis ( DA E epartment of Planning/Buil i g/Public Works J z 2y7L��,e__ 7 Q Jim�`Shepher , Adm nlistratorD TE Community Services (.._ ,, --:-, - 7, , , i / c7 7 /{( Lee Wheeler, Fire Chief DATE Renton Fire Department, . . ' ercsignature CITY OF RENTON DETERMINATION OF NON-SIGNIFICANCE (MITIGATED) MITIGATION MEASURES APPLICATION NO(S): LUA-99-088,ECF APPLICANT: City of Renton; Utilities Division (John Hobson) PROJECT NAME: Higate Lift Station Elimination DESCRIPTION OF PROPOSAL: The Utilities Division of the P/B/PW Department is proposing to eliminate the Higate sewer lift station and replace it with a gravity sewer system. The project site consists of two existing City held easements totaling 30 feet in width (15-foot wide utility easement& overlying 30- foot wide construction easement), which cross three separate properties. The site is designated Residential — 8 dwelling units per acre (R-8) on the City of Renton's Zoning Map. The proposed use of the site, as a "small utility," is considered an outright permitted use in the R-8 zone. The new 8-inch gravity sewer line will extend north from NE 20th Street for 646 feet, then turn west at a right angle. The line is proposed to continue west for 440 feet where it will connect to an existing sanitary sewer manhole located in Jones Avenue NE. The project also includes the placement of four new sewer manholes as well as the restoration of disturbed areas (vegetation and asphalt). Approximately 814 linear feet of the proposed sewer line would be located within a Category 2 wetland and its 50-foot buffer. A modification to the wetland regulations has been requested in order to allow the proposed activity in wetland and wetland buffer areas, thereby exempting the project from wetland compensation requirements. LOCATION OF PROPOSAL: 1800 NE 20th Street and 2010 & 2120 Jones Avenue NE MITIGATION MEASURES: 1. The applicant shall follow the recommendations contained within the Subsurface Investigation and Geotechnical Engineering Report for the Higate Sewer Project, dated January 12, 2000, prepared by Golder Associates. 2. The applicant shall follow the conceptual mitigation recommendations contained within the Higate Sewage Lift Station Wetland Delineation Report, dated December 1996, prepared by Entranco, Inc. e• CITY ,,F RENTON ..IL ° Planning/Building/Public Works Department Jesse Tanner,Mayor Gregg Zimmerman P.E.,Administrator March 9, 2000 TO: Property Owners SUBJECT: Higate Lift Station Elimination Project No. LUA-99-088,ECF Dear Resident: This letter is written on behalf of the Environmental Review Committee (ERC) and is to advise you that they have completed their review of the subject project. The ERC, on March 7, 2000, issued a threshold Determination of Non-Significance-Mitigated with Mitigation Measures. See the enclosed Mitigation Measures document. Appeals of the environmental determination must be filed in writing on or before 5:00 PM March 27, 2000. Appeals must be filed in writing together with the required $75.00 application fee with: Hearing Examiner, City of Renton, 1055 South Grady Way, Renton, WA 98055. Appeals to the Examiner are governed by City of Renton Municipal Code Section 4-8-11 B. Additional information regarding the appeal process may be obtained from the Renton City Clerk's Office, (425)430-6510. The preceding information will assist you in planning for implementation of your project and enable you to exercise your appeal rights more fully, if you choose to do so. If you have any questions or desire clarification of the above, please call me at(425)430-7270. For the Environmental Review Committee, / 444 Lesley Nishih a Project Manager Enclosure dnsmItr 1055 South Grady Way-Renton,Washington 98055 Sn/rwrvrlwri motoriwl n%nnct rnnc.rnwr . ROTICE ENVIRONMENTAL DETERMINATION POSTED TO NOTIFY INTERESTED PERSONS OF AN ENVIRONMENTAL ACTION PROJECT NAME: HIGATE LIFT STATION ELIMINATION PROJECT NUMBER: LUA-99-088,ECF The Utilities Division of the P/B/PW Department is proposing to eliminate the Higate sewer lift station and replace it with a gravity sewer system. The project site consists of two existing City held easements totaling 30 feet in width(15-foot wide utility easement&overlying 30-foot wide construction easement), which cross three separate properties. The site is designated Residential—8 dwelling units per acre(R- 8)on the City of Renton's Zoning Map. The proposed use of the site,as a"small utility,"is considered an outright permitted use in the R-8 zone. The new 8-inch gravity sewer line will extend north from NE 20th Street for 646 feet,then turn west at a right angle. The line is proposed to continue west for 440 feet where it will connect to an existing sanitary sewer manhole located in Jones Avenue NE. The project also includes the placement of four new sewer manholes as well as the restoration of disturbed areas (vegetation and asphalt). Approximately 814 linear feet of the proposed sewer line would be located within a Category 2 wetland and its 50-foot buffer. A modification to the wetland regulations has been requested in order to allow the proposed activity in wetland and wetland buffer areas,thereby exempting the project from wetland compensation requirements. Location: 1800 NE 201"Street and 2010&2120 Jones Avenue NE. • THE CITY OF RENTON ENVIRONMENTAL REVIEW COMMITTEE (ERC) HAS DETERMINED THAT THE PROPOSED ACTION DOES NOT HAVE A SIGNIFICANT ADVERSE IMPACT ON THE ENVIRONMENT. Appeals of the environmental determination must be filed in writing on or before 5:00 PM March 27, 2000. Appeals must be filed in writing together with the required 575.00 application fee with:Hearing Examiner,City of Renton,1055 South Grady Way,Renton,WA 98055. Appeals to the Examiner are governed by City of Renton Municipal Code Section 4-8-11B. Additional information regarding the appeal process may be obtained from the Renton City Clerk's Office,(425)430-6510. J±Ittk: Ti rj it Iu■lulN 1l -\ i L • - alai:_ L 1LIi _,;: , , iPc Valois 4!1 [u —sue� rT -- �.I___. HK i '..:i = i �.1.a■ •9 MN ... "na% 111.16; ah ... PR07 • �� Apli ..e ,,_ : . ,=. c. . , :,.m._ r, ...„in - r ig Fit Stn.. fig .": l �.. ■• UN 1 • CERTIFICATION I, Angr<< Dc..34,1.4,w , hereby certify that ,3 copies of the above document were posted by me in -3 conspicuous places on or nearby • the described property on Fr;,-J`9-41 v11 ay cht 3 , 7..00n • / Signed: ��„ sue ATTEST: Subcribed and sworn before me, a Nortary Public, m and for the State of Washington residing`irrP , , on the /6 `1 A day of ) )-A( 4_ 0 6 r CHEFF YUBLIC SI INGTON ION EXPIRES %91 2003 MARILYN KAMCHEFF ,,,,,, MY APPOINTMENT EXPIRES:6-29-03 STAFF City of Renton REPORT Department of Planning/Building/Public Works ENVIRONMENTAL REVIEW COMMITTEE A. BACKGROUND ERC MEETING DATE: March 7, 2000 Project Name: Higate Lift Station Elimination Applicant: City of Renton; Utilities Division (John Hobson) File Number: LUA-99-088, ECF Project Manager: Lesley Nishihira Project Description: The Utilities Division of the P/B/PW Department is proposing to eliminate the Higate sewer lift station and replace it with a gravity sewer system. The project site consists of two existing City held easements totaling 30 feet in width (15-foot wide utility easement& overlying 30-foot wide construction easement), which cross three separate properties. The site is designated Residential—8 dwelling units per acre (R-8) on the City of Renton's Zoning Map. The proposed use of the site, as a"small utility," is considered an outright permitted use in the R-8 zone. The new 8-inch gravity sewer line will extend north from NE 20th Street for 646 feet, then turn west at a right angle. The line is proposed to continue west for 440 feet where it will connect to an existing sanitary sewer manhole located in Jones Avenue NE. The project also includes the placement of four new sewer manholes as well as the restoration of disturbed areas (vegetation and asphalt). Approximately 814 linear feet of the proposed sewer line would be located within a Category 2 wetland and its 50-foot buffer. A modification to the wetland regulations has been requested in order to allow the proposed activity in wetland and wetland buffer areas, thereby exempting the project from wetland compensation requirements. Project Location: 1800 NE 20th Street and 2010 & 2120 Jones Avenue NE Exist. Bldg. Area gsf N/A Proposed New Bldg. Area gsf N/A Site Area 16,290 sf Total Building Area gsf N/A RECOMMENDATION Staff Recommend that the Environmental Review Committee issue a Determination of Non-Significance—Mitigated. _ PE %i,"�ur;N `\ m.'- -= --141 = - MI-..• ��Etu:11111 III -r =,.. �� ..�i�llir =I: !-■ �. =1::.: u11=' 11 MI�� "C1�lliii %iui t�- -- 3.a EP 111 91. E.-:-, no_.....,,--- a . r lob.■: -1-1—:42 V,E lime Lila _�111 \= =-Ir' ■ -■. �— 11a!'1 i�:�:�i • - II :- +1 1■�u. �-. i- �4�■i ercrpt I 1 r INII P'►;YI I I • City of Renton P/B/PW Department Environm r Review Committee Staff Report HIGATE LIFT STATION ELIMINATION LUA-99-088,ECF REPORT AND DECISION OF MARCH 7, 2000 Page 2 of 4 B. RECOMMENDATION Based on analysis of probable impacts from the proposal, staff recommends that the Responsible Officials make the following Environmental Determination: DETERMINATION OF DETERMINATION OF NON-SIGNIFICANCE XX NON-SIGNIFICANCE-MITIGATED. Issue DNS with 14 day Appeal Period. XX Issue DNS-M with 14 day Appeal Period. Issue DNS-M with 15 day Comment Period followed by a 14 day Appeal Period. C. MITIGATION MEASURES 1. The applicant shall follow the recommendations contained within the Subsurface Investigation and Geotechnical Engineering Report for the Higate Sewer Project, dated January 12, 2000, prepared by Golder Associates. 2. The applicant shall follow the conceptual mitigation recommendations contained within the Higate Sewage Lift Station Wetland Delineation Report, dated December 1996, prepared by Entranco, Inc. D. ENVIRONMENTAL IMPACTS In compliance with RCW 43.21 C. 240, the following project environmental review addresses only those project impacts that are not adequately addressed under existing development standards and environmental regulations. 1. Earth Impacts: The subject site is relatively flat with slopes averaging 1%. The site consists of al 5-foot wide utility easement and an overlying 30-foot wide construction easement. The City held easements extend through portions of an existing paved roadway and through three residential lots developed with single family homes. The properties are vegetated with grasses, weeds, blackberries, and trees. The site also contains portions of a Category 2, high class wetland and wetland buffer area. The project would require the excavation of a trench for the installation of an 8-inch main and manholes. In addition to 16 alders (12 at 5 to 8-inch diameter/4 at 18 to 30-inch diameter), native plants and grasses would also be removed within the construction zone. Renton Municipal Code section 4-4-130D3 exempts essential tree and vegetation removal for public and private utilities from the Land Clearing and Tree Cutting Regulations restrictions for sensitive areas, which would typically prohibit clearing activities within 25 feet of the wetland. Where suitable, the trench would be backfilled with the excavated native soils. Where it is not suitable, imported select backfill will be used. The depth of soil cover above the proposed sewer line would range from 3 to 14 feet. The construction zone would be restored to its existing condition with no alterations to the existing topography. Project restoration would include repaving of disturbed asphalt areas and reseeding of wetland areas with an approved wetland seed mixture. A Geotechnical Engineering Study, dated January 12, 2000, was prepared by Golder Associates and submitted with the land use application. According to the report, the site appears to be underlain by layers of loose to very dense fill or peat, overlying deposits of loose to compact, fine to coarse recessional outwash and very dense glacial till. A high groundwater table was encountered at depths ranging from 1.5 to 8 feet below the surface throughout the site. In order to mitigate impacts resulting from the high groundwater table combined with loose soils, the Geotechnical Report includes several recommendations during site preparation and construction. These recommendations include, the use of temporary construction surfaces, dewatering of groundwater, and erosion control—all of which staff will recommend the applicant comply with in order to mitigate potential impacts to the site. In addition to these recommendations, the project is required to implement standard code required erosion control measures such as fabric catch basins, hay bales, and silt fencing. ercrpt • City of Renton P/B/PW Department Environm Review Committee Staff Report HIGATE LIFT STATION ELIMINATION LUA-99-088,ECF REPORT AND DECISION OF MARCH 7, 2000 Page 3 of 4 Mitigation Measures: The applicant shall follow the recommendations contained within the Subsurface Investigation and Geotechnical Engineering Report for the Higate Sewer Project, dated January 12, 2000, prepared by Golder Associates. Nexus: Environmental (SEPA) Ordinance 2. Surface Water/Wetlands Impacts: A Wetland Delineation Report, dated December 1996, was prepared by Entranco, Inc. and submitted with the application. The report was accompanied with a letter, dated August 16, 1999, which states the report is still valid based on current site conditions. According to the report, the site contains a Category 2, high quality wetland involving scrub-shrub vegetation delineated at up to 8 acres in size. The wetland is directly connected to the Higate Creek corridor and is fed by surrounding seeps in several locations. Trenching, which would occur within portions of the wetland and its buffer area, is proposed for the installation of the sewer line. Where suitable, native materials would be used for backfill. However, approximately 638 cubic yards of imported backfill material are estimated to be used in addition to native materials. All unused fill material would be transported from the site. The project also includes the temporary diversion of the existing drainage course (Higate Creek)and trench dewatering during project construction (water volumes would depend on the level of the water table at the time of construction). The original drainage course would be reinstated following the installation of the proposed sewer line. The 30-foot wide construction corridor would likely impact approximately 13,350 square feet of wetland area and approximately 6,600 square feet of wetland buffer area. RMC section 4-3-110K of the Wetland Regulations lists specified allowed and regulated activities within designated wetland areas and buffers. These activities are permitted provided disturbed areas are immediately restored. All other proposed activities are required to provide a wetland mitigation report and plan proposing compensation through the creation of new wetland areas at specified ratios. The project proposes to immediately restore all disturbed areas to pre-existing conditions. Although no permanent impacts to the wetland areas are likely to occur, the proposed utility line installation is not clearly listed under the activities allowed and regulated by the wetland regulations. This would require the creation of new wetland areas at a ratio of 2 times the area altered (approximately 26,700 square feet). The proposed utility line is, however, closely associated with an allowed activity. Therefore, a wetland modification request has been included with the application in order to establish this specific proposal as an allowed and regulated activity in the wetland area and buffer. Modifications from the wetlands regulations are permitted whenever there are practical difficulties involved in carrying out the provisions and only in individual cases (RMC section 4-3-110N). The approval of the modification by the Administrator of the Planning/Building/Public Works Department would be necessary prior to the issuance of a threshold determination. In the event the modification is not approved, a wetland mitigation report and plan would be required and a threshold determination would be recommended after the mitigation plan is reviewed. According to the Wetland Report submitted with the application, the proposal is not anticipated to result in permanent impacts to the wetland. The report does include recommendations for temporary construction impacts resulting from the project, such as the establishment of clearing limit fencing, protection of trees, methods for cutting vegetation to encourage rapid regrowth, and keeping stockpile soils areas away from wetlands areas. In order to mitigate the short term impacts to the wetland area and buffer, staff recommends the applicant comply with the conceptual mitigations contained within the wetland report. In addition to the approval of the modification previously discussed, the project would be required to obtain approvals under separate permitting requirements for Department of Fish and Wildlife Hydraulic Project Approval Permit(HPA), Army Corp of Engineers Section 404 permit, and Department of Ecology Water Quality Certification. Mitigation Measures: The applicant shall follow the conceptual mitigation recommendations contained within the Higate Sewage Lift Station Wetland Delineation Report, dated December 1996, prepared by Entranco, Inc. Nexus: Environmental (SEPA) Ordinance ercrpt . City of Renton P/B/PW Department Environm Review Committee Staff Report HIGATE LIFT STATION ELIMINATION LUA-99-088, ECF REPORT AND DECISION OF MARCH 7, 2000 Page 4 of 4 E. COMMENTS OF REVIEWING DEPARTMENTS The proposal has been circulated to City Departmental/Divisional Reviewers for their review. Where applicable, these comments have been incorporated into the text of this report as Mitigation Measures and/or Notes to Applicant. X Copies of all Review Comments are contained in the Official File. Copies of all Review Comments are attached to this report. Environmental Determination Appeal Process Appeals of the environmental determination must be filed in writing on or before 5:00 PM March 29, 2000. 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I E / I1 I E I SIngle-Family:Residences I ) I rn Legend FEB ,0, NTON It 1 I . *CT: 9 R z000 �� "t! 0'Wetland Butter I I ©SP-1CC/ < w !i C i +RoEi : Soil Pit E C VEc u1 Mt-1 S — f„7..—,,, — - •_—.. — _.._—._. Z Wetland Flag a ",,:�„�„�, 1, Jones Avenue NE —w— Delineated Wetland Boundary _ _ , N�,1. —w__ Approximate Wetland Boundary is v. __ au :! �( .I�1 ..—_ 50'Buffer Zone t 1f1 t s 0 t i Higate Sewage Lift Station'"- Wetland Delineation Report t © EN T R A N C O Figure 5 Wetland Delineation Map El, 0 - ._7. y •_ °'' CITY OF RENTON I 0 3 z HIGATE LIFT STATION ELIMINATION 0 SOUTH 1 /2 SECTION 5, TOWNSHIP 23N, RANGE 5E a s M SHEET 2 W :i NEW e•swTARYISEWER _ • C7 — LAKE PROJECT •� = s V LOCATION SEATTLE WASHINGTON billin ST PO1L SNORT PLAT L _ aLNFR =LTMI* w 1 •PROJECT ' LOCATION �Z 'PS J� �. 10 �_gD ZnW _' RENTON ISSAOUAH RD UC € Cr.. ilir Q _ i. "�c^ tj 'ENTON In w 1 4- p Z 61I a T O; I a RENTON TUKWILA IIM14 $q`9 /�. ,��,'�� CITY K ROMP. BENCH NARK '� Po OUyilW S4 PRR OWER a IF.CSS•OF 111 d. TERSECTRIR SC?fliw ST .P µDv 1S OW YE. SHEET 4 © cfo 4`_� NE 20TH ST 100,3 'W. 4A�`� EX E'S.w.SEw. E%.!C •1 ill I�'R t-y4 fYR Ex NFL u..l r O : nYO sw.SOW I -I NV ® EXISTING HIGATE INDEX TO DRAWINGS YaugRT I SEWAGE PUMP STATION RENTON SHEET 1 VICINITY MAP &INDEX TO DRAWINGS : -- - it 6t ii!x i" ® _ BERRY FA. SHEET 2 PLAN & PROFILE i TUKWILA SHEET 3 PLAN & PROFILE a SHEET 4 PLAN & PROFILE - SHEET 5 DETAILS AND SECTIONS t SITE MAP VICINITY MAP mt P1A3414114G N.1 S. SHEET 6 DETAILS AND SECTIONS N.T.S. LOWS'''. KrON O c►n OF RE FEg10aV* G��vED R RECOYYEIDED FOR APPROVAL ��5 �.�,,��o 'MI S-210901 • (10 o _ - NrT4t' 4^ n NOTE. CU ALIGNI/ENT IS NOT CENTERED W EASEMENT TO NE 28TH ST SOUTH 1/2 SECTION 5 TWP 23N R 5E FAouuTE c.NEcnW To EnsTWc MNNNOLE. D EAEMEN FT 9.Nu BC PLACED W CENTER Of i1bl,..... / / EASEMENT AS SNOVW. Q= Q#I MA HOLE W JONE SANITARY SEWER NEW HE I MAY EXISTING p ^ / EASEMENT BASED UP.DIE ACTUAL POLO LOCAn. //�� SKEW YHNttv ACROSS ME t5'TROT URLIir • N /A. Of THE CUISINE unNN0.E.ESTABLISH A STRAIGHT / ALIGNMENT TD MEET NII fT ST•I.STALL BE W W ■ /� 17 /at Z aZ CENTERED W THE,5'-vnDE UTR11Y EASEMENT. O 2 - - - 18 W e m p / Q ee I TRACT 224 e Z o W ' TAX LOT 3E02 7 a m m S s4 Q IE fN Sj WSTALL Ce / / TRACT A7 R INSTALL 811,43 .....1.)) '.�� COf 5 TAX 3162 ¢ d TRENCN RUG [� 1RENCN PLUG / C\ O W UNDER WTI CRAVEL�ACCE55 � 6 IE 243.n Z . ROAD. _ J JE'CEDAR w•- / �/6 r EASE E T�NWE UMlly N 11 tY moo I �� 901040L 5 PAGEMTNr OR.DR. 2i ER I E rc^^�_ )�D BOBE_•W2lF TREES + /'ti V \/2: C\T) ).s1 / c i]0.19e2.Js e Qli AHD PATp,EAST CL•/t o — CONNECa10EK.0 w __ _ S4 ��. __ _ __• • __ ;7-- __ __ - • e—BOREHOLE (JA ���.. 324 LG •PVC R HEw MANNOLE 21 2tE . NEMCNE 3 rH /dam^ •c I IS V� EASEMENT ___ L W u' E 2])r /q•�.,. _ NEM e•IRW CH4N UNt �nSTALL 2{ OD. ]D•ALDER � 7 � REMOLD iREi4 V fY o REPLACE EAS.O 6• / •'^ • �■T STAND RD -N{'WE ljOLL —T'Ri ENCH RUC L]D'TEMPORARY PVC STUB li A II $EE OTY Of RENTW CWSIENT POST II I , S ARD PLAN R00.3 5 \ EASEMENT 244 M I DE00. I r- 1/4' d 411 11 E OLO IRACT POT 2 E I „, I MEMND BOUWART� OlD )e AT MATCH LINE STA 5+60 SEE SHEET 3 69•19'413 6,0.06' ! TO� NE 20TH ST PLAN 3 scat,•.20' • • _ �����MYMMMRj111 nII n w 270.. . oi 770 =N'4 I 1■ • i Ai cCloAa ,� 250 111 1 f EP5,610 PARE • ' i 2_ e J a . _40 5 EnsTWO 0 .. r 409 LE e•c900 PVC a 0.836 REPLACE CROWS e' ,Y Q — PVC STUB • 35 II Tr Slyer no - .. - CASING 0 0e1 x • .. 230 • • • 1400 2400 3400 4400 5500 PROFILE NOTE DIT Or RENT. .11 rc SNAIL 1'.20'H NEW 6'PVC SKALL BE INSTALLED I100A0N RENCK MARK N••10'V NEW 14•STEEL CASING. RR SPIKE W SE FACE OF POWER POLL 6'LP.SW WIERSECTRLJ NE 2064 ST AND JO NS AGE NE. EL.227.09 o S-210902 o ---- SOUTH 1/2 SECTION 5 TWP 23N R 5E -IK n TAR L01 isle p I v. 01 00° µ201 �� J/ / ILEsvrT EM1NG IT RAGE �/ I MOUSE REYpVE ANp x:RACE C STwC O L DIGRESS/EGRESS r+♦♦♦Y LOT 12O2 i ��� aP' le / �� EASDRO9i RIMY nez. LREI4O.RANG EPUCE CMRI N �o Z L a RN- / GRASS L V • I 4... �nGRAS s TWS 111wGOTWWSwiLLERESTORE LA11N AND LANDSCAPING WPROVERENT +�IJu P / RESTORE 0KIUNREO SCALE WM b APPROi.e-TOi•xDEi0 WRECWSIRUCOdI CWgigx.PRONDE NEw ,� yOROgEGIf.xSTALL XASM". 5 TOPSpR ANO SOD FOR ALL INSTURBEo AREAS • N DFAiNAC W 1•/PPLE WSTA L I oR DAYS Ai 15'w ERVA 5 e DAUAGEp 9y CWSMUCRW.iW w5 PAR_ /� CD< OILY TO NORM EDGE Oi ROAOwAY OI NE N iNENCM RUG . 432OM ALE.tw/1 I FEND POSL WS1_12•36-DECD I EOp.uy�• I 12-FiR Y / iRENC O I / 32'OECD. 10 POPLARSb II, BEHOVE FENCE POST /�\]--_ / -- _- Y` v r �J . • . • •!'PVC _ 1 �d ` -- ._--h� - t NEw a SANITMy REA N�- ~m�OEC' D .ae _ — R.m /r Mm - Aa.m - 8• o 13 �^NN ( l- —�itl Inn 13:311 `Ice PERMANENT I j REMOVE L `REuo.E lo• uD c L+ ,�Iry J/ / BOREHOLE FENCE POST FENCE POST 90REI�E EASEYENi e • 1• 1 "i'�I IS•PERMANENT EASEMENT ql_. OA' Ir xSTALL / e 8 E R R E S 1 �3G TEYPORMy NsIALL WECf OAR �� / IS W 1 ORNAUECOKTRUCMIXY 1RENCN RUG �� — �^� ' Q S I1 NTTON GWTRACTW SHALL RESTORE gRAxAGE SHALES S EAYYENT �i OEPM,WAGE,AND ALIGN..i TO THOR RESPECTIVE S l ` I / Palt LOT SNORT.r- CONTRACTOR NOTE $HALL REuOVE AND I BE INOOpREcoN'ENiAI�TON COROIpNµ ISM KTI�ON� XrpRosEEO ALL AREAS .' 1 Npu SERER DISILIRBFD BY COKTRUC1pN GARAGE F I I l9 1 I' OISPosE Of DECAYED BARN.MS TAR LOT 31m r pEa ..JE.✓ ROAR SHALL eE INCIDENTAL TO .,y. SERER MAIN CONSTNUCOd. I I �n°4° I 1 I Y FIN a PLAN_ 0 a 5071E 1-.20' JONES AVE NE 4 11 • 280 i� w LaH In 1 Jri pro • .... -. M... w • g Tt 1 Q EAST.WADE w t ' S IZ r + �w • E§I II IX IX ax eiz lF Srcsoo P c a a.esx 240 ! t t = a230 - - 230. L 6.00 ).W e•oo 9400 10.00.. 11.co Orr OF RENTW PROFILE RRNCH SPINE W SE FACE OF SCALE'-.20'X PORER POLE e'(P.SM w p•y INTERSECDON NE 20 Sr AND.ZONES AVE NE. El.27709 g = S-2 1 0 9013 • o - s'!�! SOUTH 1/2 SECTION 5 TWP 23N R 5E r'llr\ - CH AA TAX LOT 3200 LOT 3202 011S(nB00 MATCH LINE STA 10+60 wausE nee• \ ,,I, ; I SEE SHEET 3 PWL S7r PpAi �Ipii!I-!k CON ECTMANHOLE IS N I 20'FIR12 W LOT 1 \ \ CONNECT)TO 1 Z Z \ e OLD TRACT 263 $C ? iI II if J• 6µ PVC TO t 9'pECN).f�T2'APPLE I y� Y3 . wE II, EXISIDXi.TOE i Q. R 6- ROO.WALL (' I/E 19411 ll1ll E 20TH ST 1BBB>).). S S—f S I • a SPUIp STA1gN LAJ PLUG ABANDONED LINE 6 E 130356523 r \ CONC.VAULT =Bra PLU EX FOTTCEUAW XE I.B 2s 'C.CUIv 1- ROCKS — A 248.03 RUG INLET ANO OUTLET Cr EIOST. Z ON I hQ1 R'LL A"o FENCING.REUOVE MIXTURES R iOtLEUAM LOCATED IN uANHOLE tiT STRUCTURE IyI 'II AND CLAVEFTS.RECHANNEL CREEK.INSTALL G I AT MlERSECTpN O(JCNES AVE.AND SEE SPECR�CAnpN ��Y„ 6-PEA GRAVEL BOTTOu AND pIP RAP - 20TH STREET.TINS BORN SHALL BE SECTION 2-02.30 III CREEK BANNS.i E BOON SHALL O INCL S,. INCLUDED IN LUMP SUu PRICE•0 FOR XE 2476. IN LUMP Suu POKE BIO FOR ABANOW ENS,. �T_ 3 ABANDON EXISTING PUMP STA TON, tE 2M.15 PVUP SiA nOn. W e OLD BERRY(ARSE TRACT 2TIS PLAN HOUSE n»J < ii i a �. !I I a ilzBo s I 6 I 1r j -. 260 —i • b • • 233 EXISTING ROAD GRACE 252 i 3f 2)0 MP RAP MINT AM LOOSE u •M SIDE SLOPES E — yq ='Sn £ s-NICK PEA CRAWL sorra. • I 2•> u i•KKR:1RM200Y-BOTTOM & 0 260 i• Rr INi5 .. it Yy F ET Y k 1S�_ u ar' • E•9TKG PALETALYi QADE v1ibi ;N, U •R n� - - ... ..... ... • ... g l ;go " �� 250 CREEK 2SEC�710N O • i 1 V. SCALE s T.R »i a,uYY 240 • • `REUOVE EXISTING 60 are O(RENLON • • SEW*ANO PROVIDE BENCH EARK . • ...HEW 6-OK AS SHOWN RR SPIKE ON SE FACE CF POv.ER POLE 6'LIP.Sr 0N+ERSECTNIN NE 20M ST AND ANES ALE NE. 2)].p9 z 2r 00 3.00 4.00 PROFILE SCALE 1-w 20•N = S—I210904 • ma o - --- 3 n N II aIm llt111111 l/1111;l��1hlifilillr,h l„,0,0 ,.0 l ROOM I Inn I I I W / a POR PATCHING \\%\\%\/\ \ \ % /�\%\\ \ \ �.�.•.t.•:- SEE DETAIL \�\\/\\ \f /i/ / p P••O;••••••••••••••••*•� O `y//\ / \ ♦ BACKF LL MA ER A W E U••• :•••• O ii•••i•••ii••i••i:� :iiiiiiii•••iii 2 '�""�'�'�� WITHIIN TIE RTC-OF-WAY ( iiiiiiiiiiii! G i„�� AS SHOWN IN OE tA1L s . .❖.• i❖.❖.! YJ / zi:.;vv':i F• a- M•••••••�•• BACKFILL MATERIAL • W e 6•SANITARY SEWER X••••••❖••••••••••••• AS THE N RIGHT-DF-wAV e p � 6 B••••••••••••••••••••••! AS SHORN IN DETAIL 5 .±. i/„A AS BEDDING MATERIAL i/�� T•' AS SPEGFIED IN 9-OS t6 % / 6 EXCAVATION OF UNSUITABLE SOL AND I. /•F/ B•SANITARY SEWER BACKFILL OF FOUNDATION MATERIAL(IF NECESSARY) DEP.AS APPROVED BY ENGINEER. MATERIAL SHALL MEET SECTION i A9-03.9(t BALLAST PISPE REDOIEO NG MIN9ATERIA -0},L18 T A SPEGFI E.-4 1.ALL UNSUITABLE MATERIALS EXCAVATED FRd1 ME TRENCH SHALL BE REMO EXCAVATION OF UNSUITABLE SOIL ANDVED. BACKFILL CC FOUNDATION MATERIAL(IF NECESSARY) r Z u HAULED AND DISPOSED. EXCAVATION SHALL BE REPLACED MTH FOUNDATION, DEPTH AS APPROVED BY ENGINEER. BEDDING AND BACKFILL MATERIALS AS SHOWN VITRENCH BACKFILL DETAIL ADO MATERIAL SMALL MEET SECTION 43 a' COMPACTED IN ACCORDANCE BATH SPEOFICAr1ONS UC+ a 9-0}.9(1)BALLAST 2 ALL TRENCHES IN ARTERIAL STREET ROADWAY AREAS SHALL BE BACKFILLED a MO PATCHED MM TEMPORARY ASPHALT AT ENO OF EACH WORK DAY, SANITARY SEWER BACKFILL 1.ALL UNSUITABLE MATERIALS EXCAVATED FROM THE TRENCH SHALL BE REMOVED. .4 HAULED AND DISPOSED. EXCAVATION SHALL BE REPLACED WITHFOUNDATION. �) ; WITHIN RIGHT—OF—WAY DETAIL 2-A BEDDING AND BACKFILL MATERIALS AS SHOWN IN TRENCH BACKFILL DETAIL AND COMPACTED N ACCORDANCE WITH SPECIFICATIONS. N.T.S. 3. ALL TRENCHES IN ARTERIAL STREET ROADWAY AREAS SHALL RE BACKYILLED (i MID PATCHED WITH TEMPORARY ASPHALT AT ENO OF EACH WORK DAY. h4-illipSANITARY SEWER BACKFILL di WITHIN WETLAND DETAIL CI N.T.S. rawc STARY IRENIH 03:� NA II/ III i 11I I I I I. , ,,I I I z \/ / • • `-p MN.,,I-ASPHALT rr Y y �`/�,(�/\ �� � �i RAT LE SOL51ER1AL CONCRETE(7 LOTS) IRE SAW-NTT EMUST 1T 1§I§as 15 �I�•\`C4C1'� A A� A nAn 6.\ F Xa 'TF•'•'•'•••'•r 1 6•MINMUM CRUSHED , .�.�•❖•••••••••�•.•.•�•�•.•:4:• E CONTROL DENSITY FILL SURFACING TOP COURSE. 0.4•4•••v•,im.••••••o",A•❖•i - - .•••••{••••••••••••••••••••••••♦ SUBSEOUENI BACKFILL MATERIAL L ••••••••••••••••• (NATIVE R APPROVED BY ENONEER) OR IMPORT PER SECTION 9-03.0(3) STREET PATCHING ® CRUSHED SURFACING BASE COURSE N.T.S. FL T I. ALL TRENCHES IN ROADWAY AREAS SHALL BE BACKFILLEO AND PATCHED tlD.0 PER SPEOAL PROVISION 5-06.1 AT THE END OF EACH WORK DAY. THIS WORK SHALL BE NODENTAL TO ALL TRENCH RESTORATION WORN. H.TN;MENOG PLUGS SHALL WINO 3 TEET BELOW TK WITT.Q THE SEWER PIPE TRENCH BY 3 FEET EIMER ROE IT I. THE FINAL SARCUT..ONT SHALL BE A MINIMUM OF(1)ONE FOOT BEYOND s ME TRENCH.BY 3 KV ABOVE 1K ME UNDISTURBED EDGE OF THE TRENCH. olvAMW or HIT[CROWN Or INC PPE. rc TRENCHSH9MLL WWI.A AMM K 3 3. ALL ASPHALT PATCH AREA OUTSIDE OF PAY LIMIT SMOME SHALL FEET 1 MUC BE CONSIDERED INCIDENTAL TO OTHER ITEMS OF MOTILE. CONTROL DENSITY FILL® A. ALL TEMPORARY PATCHES ON TRENCHES SHALL BE PERMANENTLY PATCHED RARY (A)TwOPATCHES WEEKS OF ES ALON OF WORK PERMANENTLY WITHIN TRENCH PLUG THE ROADWAY AREA UNLESS APPROVED BY THE ENGINEER. N.T.S. 9 S—2 1 0 9 0 5 7 2. JJ 19 791 11 i. _ I A' p .... 11y- — P -- RIP RAP APRON TO PREVENT Z FORYAnON 0<SCOUR HOLE GRASS SEEDED SIDE SLOPES i zoGr NRE UPSTREAM OF POSTS FLOW NTO ME GROUND. J - 3:1 SIDE SLOPES 3:1 SIDE SLOPES l• •1(• •lt• •I a pFLAT BOTTOM :ems.r:••_+ .7.1.1s tfL- •:Y`��'�t�•'f�%� �Y-} 3:1 SIDE SLOPES • DITCH IMPROVED SECTION 0 z...1/4: SCALE 1/2'-1'-0- PI AN 1 - - STRAW BALE CHECKS O E..y H.T.S. 3 EW Ua 4 4 11 ii If 11 td Oil CARRIER PIPE g E:�a GENERAL NOTES •`#• OUTSIDE DIAMETER OF JONT BELL i — 1.VERTICAL CONTROL DATUM BASED ON USCkGS. ` •L 2. N/�� COTRACTOR WI LOCATIONSAµD ELEVATIONS ONALLTIN DETERMINED BY THE 16'STEEL CASING PIPE CASING INSULATOR USE 3 PER 20'OF PIPE(CALPICO INC.. ` ` ENOS OF EXISTING CASING:REMOVE CASCADE WATERWORKS MFG.CO.. 3.EXISTING PRIVATE YENTS SHALL BE TEMPORARILY RELOCATED AND MELDED CAP.INSTALL UTILITY PIPE PERMANENTLY REPLACEDLACED TO ACCOMCDATE SERNCE CONSTRUCTION. AND INSULATORS ANO SEAL UTILITY OR APPROVED EQUAL) 1f 1§if II 15 A.aTAnONINQ SHOWN IS DEFINED BY ME CONTROL POINTS. PIPE TO CASING NM CASCADE SYSTEM CCES CASING ENO SEAL OR APPROVED EQUAL w 5.ALL MANHOLES SHALL HAVE LOCKING LIDS. (TYPICAL) ........... `1 < 6.PRONOE AS-BUILT INFORMATION SHOFNING ALL INVERT AND RIM ELEVATORS. —72=1 - ---.---�-'{�� T.INSTALL SEWER YNN AND SERNCES A MINIMUM 2'FROM PARALLEL GAS UNES (� ' WHERE CONFLICT OCCURS. - — I,NSULATORS SHALL BE MECHANICALLY CLAMPED TO PIPE: 8.ALL CEMENT CONCRETE DRIVEWAYS AND ALLEY APPROACHES SHALL BE 10-TRIO( CUSHION BETWEEN PIPE AND INSULATOR SHALL BE UNED o MM RUBBER OR PVC: INSULATOR SHELL SHALL BE A 9.THE CONTRACTOR SHALL VERIFY THE LOCATION ANO E OFF A UM E ITIES NIMBUS Is GAUGE STAINLESS STEEL.LOw DEFLECTOR PRIOR TO CONSTRUCTION.CONTRACTOR SHALL COORDINATEINATE RELOCATION Au.LOCATION NM UNDER COMPRESSION,AND HIGH RESISTANCE TO ABRASION: UTILITY OWNER IF REQUIRED. INSULATORS SHALL BE MANUFACTURED BY CASCADE WATERWORKS MFG.CO..CALPICO.INC..OR AN APPROVED EQUAL. 10.THE MATERIAL PRESENTED ON THIS DRAWING IS FOR REFERENCE ONLY.SOME OE ME DETAILS OR INFORMATION PRESENTED ON THIS ORAw1NG MAY NOT BE 2 CONTRACTOR IS RESPONSIBLE FOR EXCAVATION SLOPE STABILITY REWIRED AS PART OF THIS CONTRACT. AND DEWATERINC DURING UTILTY INSTALLATION NMIN EXISTING CASINGS. . 11.PROPERTY UNES ARE SHONN FOR REFERENCE ONLY. 12.CITY Of RENTON STANDARD DETAK.S ARE LOCATED NMIN ME BOUND SEWER CASING DETAIL CONTRACT SPECIFICATIONS. 13.TRENCH SAFETY AND SHORING SHALL BEET All OSHA AND NSHA STANDARDS. N.T.S. z TRENCHES SHALL BE SEALED TO PREVENT ENTRY WRING NON-WORKING HOURS. IA WHERE UTILITY PPE LINE VERTICAL SEPARATION IS LESS THAN(I)ONE FOOT. INSERT ETHAFOAM HS 600 RANK-FOAM BOARD OF EQUAL AS CLEARANCE SEPARATION. = SI-I2 10 9 U 5 CITY )F RENTON sea Planning/Building/Public Works Department Gregg Zimmerman P.E.,Administrator Jesse Tanner,Mayor March 7, 2000 John Hobson Utility Engineer, City of Renton Renton City Hall—5th Floor 1055 South Grady Way Renton, Washington 98055 SUBJECT: MODIFICATION REQUEST FROM THE WETLAND REGULATIONS- HIGATE LIFT STATION,FILE NO.LUA-99-088,ECF Dear John: I have reviewed your request for a modification from the City's Wetland Management code for the Higate Lift Station project. The evaluation and decision follow. Summary of Request The Utilities Section of the Planning/Building/Public Works Department has requested a modification from the City's Wetland Regulations. The proposal is to revise the Higate Sewer System by eliminating the existing lift station and replacing it with a gravity flow system. The project would likely impact 13,350 square feet of high quality, Category 2 wetland area as well as 6,600 square feet of wetland buffer area. The proposal does not clearly fall within the allowed and regulated activities established by the Wetland Regulations. Activities not listed are required to provide a wetland mitigation report and plan proposing compensation through the creation of new wetland areas at specified ratios. Section 4-3-110N allows the Administrator to grant modifications from the wetland regulations for individual cases. The Department Administrator shall first find that a specific reason makes the strict letter of this Code impractical, and that the minor modification is in conformity with the intent and purpose of this code, and that such modification: a. Will still meet the objectives of environmental protection, safety, function and maintainability intended by the Code requirements, based upon sound scientific judgment; b. Will not be injurious to other property(ies) in the vicinity; c. Result in no net loss of wetland or buffer area and function and value from that approved in the original project plan; Documcnt2\cor 1055 South Grady Way- Renton, Washington 98055 ®This paper contains 50%recycled material,20%post consumer March 7, 2000 Page 2 d. Will be made prior to detailed engineering and design, such as during site plan review, short plat, preliminary plat approval or the pre-application phase of planned unit development; and e. Will be documented and entered as part of the official wetland permit file. Background A Wetland Delineation Report, dated December 1996, was prepared by Entranco, Inc. and submitted with the Higate Lift Station land use application. The report was accompanied with a letter, dated August 16, 1999, which states the report is still valid based on current site conditions. According to the report, the site contains a high quality, Category 2 wetland involving scrub-shrub vegetation delineated at up to 8 acres in size. The wetland is directly connected to the Higate Creek corridor and is fed by surrounding seeps in several locations. The proposed 8-inch sanitary sewer line would be installed by standard open trenching within a 30-foot wide construction and utility easement, which bisects three single family properties. The construction corridor would likely impact approximately 13,350 square feet of wetland area and approximately 6,600 square feet of wetland buffer area. RMC section 4-3-110K of the Wetland Regulations lists specified allowed and regulated activities within designated wetland areas and buffers. These activities are permitted provided disturbed areas are immediately restored. All other proposed activities are required to provide a wetland mitigation report and plan proposing compensation through the creation of new wetland areas at specified ratios. Although the project proposes to immediately restore all disturbed areas to pre-existing conditions, including reseeding with a wetland seed mix, the proposed utility line installation is not clearly listed under the regulation's allowed activities. If not considered an allowed activity, the project would be required to create new wetland areas at a ratio of 2 times the area altered (approximately 26,700 square feet). The proposed utility line is, however, closely associated with an allowed activity. Therefore, a wetland modification request has been included with the application in order to establish this specific proposal as an allowed and regulated activity in the wetland area and buffer. According to the Wetland Report submitted with the application, the proposal is not anticipated to result in permanent impacts to the wetland. The report includes recommendations for temporary construction impacts resulting from the project, such as the establishment of clearing limit fencing, protection of trees, methods for cutting vegetation to encourage rapid regrowth, and keeping stockpile soils areas away from wetlands areas. In order to mitigate the short term impacts to the wetland area and buffer, staff has recommended the applicant comply with the conceptual mitigations contained within the wetland report as part of the Threshold Determination of Non- Significance — Mitigated. The City's issuance of a Threshold Determination for the project would be contingent upon the approval of the subject modification request. In the event the modification is not approved, a wetland mitigation report and plan would be required and a threshold determination would be recommended after the mitigation plan is reviewed. In addition to the approval of the modification, the project would be required to obtain approvals Document2\cor March 7, 2000 Page 3 under separate permitting requirements for Department of Fish and Wildlife Hydraulic Project Approval Permit (HPA), Army Corp of Engineers Section 404 permit, and Department of Ecology Water Quality Certification. Analysis 1.) Will still meet the objectives of environmental protection,safety, function and maintainability intended by the Code requirements, based upon sound scientific judgment. Subsection K of the City's Wetland Regulations provides a list of allowed activities within wetland areas and buffers. The following is included as an allowed activity under the regulations: Normal and routine maintenance and repair of any existing public or private uses and facilities where no alteration of the wetland or additional fill materials will be placed. The use of heavy construction equipment shall be limited to utilities and public agencies that require this type of equipment for normal and routine maintenance and repair of existing utility or public structures and rights-of-way. In every case, wetland impacts shall be minimized and disturbed areas shall be restored during and immediately after the use of construction equipment(4-3- 110K1d). Essentially, the proposal is to perform modifications to an existing sanitary sewer system. Similar to the proposed gravity line, the lift station is located within the boundary of a Category 2 wetland. The existing facility has reached the end of its service life. The replacement of the lift station with a gravity sewer line could be considered maintenance to an existing public facility where it would otherwise not be able to provide adequate service. The proposal should, therefore, be included as an allowed activity under the provision listed above. The intent of the Wetland Regulation's requirements for wetland replacement is to provide compensation when a project results in a permanent loss of wetland area. The subject sewer line proposal would only result in temporary construction impacts, which would be immediately mitigated through restoration measures. Therefore, the project would result in no net loss of wetland area. If the proposal is not considered an allowed and regulated activity within wetland areas and buffers, the project would be required to create approximately 26,700 square feet of new high quality, Category 2 wetland areas. It would be unduly burdensome to require the project to create additional wetland areas in order to offset temporary, not permanent, losses. It would be more appropriate to require the project to comply with the measures recommended in the submitted wetland report during site preparation and construction. Document2\cor March 7, 2000 Page 4 2.) Will not be injurious to other property(ies) in the vicinity. The proposed activity would remain within established construction and utility easements. Temporary short-term impacts may result from the initial construction of the facility. However, the surrounding properties are anticipated to benefit from improved sanitary sewer system. 3.) Result in no net loss of wetland or buffer area and function and value from that approved in the original project plan. • As stated under criterion number one, the project is not anticipated to result in permanent impacts to the wetland areas or buffers. Therefore, no net loss of wetland or buffer area and function and value would occur. 4.) Will be made prior to detailed engineering and design,such as during site plan review,short plat, preliminary plat approval or the pre-application phase of planned unit development. The modification request has been made prior to detailed engineering and design of the gravity sewer line. The final design shall incorporate all SEPA and regulatory agency requirements. 5.) Will be documented and entered as part of the official wetland permit file. The modification will be documented and entered as part of the official land use file for the project. Decision: The wetland modification request to allow for the installation of the proposed 8-inch sanitary sewer line as an allowed and regulated activity under the Wetland Regulations is approved, with the conditions that the recommendations of the Wetland Report regarding limiting construction impacts are followed, and all disturbed areas within the wetland are immediately returned to pre- existing conditions. Sincerely, 4 ef7 Gregg Vinmerman,Administrator Planning/Building/Public Works Department cc: Jennifer Henning Lesley Nishihira Document2\cor CO:°!CU RENCE: AN:c IN:ITl L/7, c CITY OF RENTON brittf514114114 'i Planning/Building/Public Works MEMORANDUM �r DATE: March 7, 2000 /7— TO: Gregg Zimmerman, Administrator .14434546,4 FROM: Lesley Nishihira, Associate Planner(x7270)v- SUBJECT: Modification Request from the Wetland Regulations— Higate Lift Station, File No. LUA-99-088, ECF Summary of Request The Utilities Section of the Planning/Building/Public Works Department has requested a modification from the City's Wetland Regulations. The proposal is to revise the Higate Sewer System by eliminating the existing lift station and replacing it with a gravity flow system. The project would likely impact 13,350 square feet of high quality, Category 2 wetland area as well as 6,600 square feet of wetland buffer area. The proposal does not clearly fall within the allowed and regulated activities established by the Wetland Regulations. Activities not listed are required to provide a wetland mitigation report and plan proposing compensation through the creation of new wetland areas at specified ratios. Section 4-3-110N allows the Administrator to grant modifications from the wetland regulations for individual cases. The Department Administrator shall first find that a specific reason makes the strict letter of this Code impractical, and that the minor modification is in conformity with the intent and purpose of this code, and that such modification: a. Will still meet the objectives of environmental protection, safety, function and maintainability intended by the Code requirements, based upon sound scientific judgment; b. Will not be injurious to other property(ies) in the vicinity; c. Result in no net loss of wetland or buffer area and function and value from that approved in the original project plan; d. Will be made prior to detailed engineering and design, such as during site plan review, short plat, preliminary plat approval or the pre-application phase of planned unit development; and e. Will be documented and entered as part of the official wetland permit file. Background A Wetland Delineation Report, dated December 1996, was prepared by Entranco, Inc. and submitted with the Higate Lift Station land use application. The report was accompanied with a letter, dated August 16, 1999, which states the report is still valid based on current site conditions. According to the report, the site contains a high quality, Category 2 wetland involving scrub-shrub vegetation delineated at up to 8 acres in size. The wetland is directly connected to the Higate Creek corridor and is fed by surrounding seeps in several locations. The proposed 8-inch sanitary sewer line would be installed by standard open trenching within a 30-foot wide construction and utility easement, which bisects three single family properties. The construction corridor would likely impact approximately 13,350 square feet of wetland area and approximately 6,600 square feet of wetland buffer area. H:\DIVISION.S\DEVELOP.SER\DEV&PLAN.I NG\Projects\99-088.LN\wetmod.doc • CITY OF RENTON Planning/Building/Public Works MEMORANDUM DATE: March 7, 2000 TO: Gregg Zimmerman, Administrator FROM: Lesley Nishihira, Associate Planner(x7270) SUBJECT: Modification Request from the Wetland Regulations— Higate Lift Station, File No. LUA-99-088, ECF Summary of Request The Utilities Section of the Planning/Building/Public Works Department has requested a modification from the City's Wetland Regulations. The proposal is to revise the Higate Sewer System by eliminating the existing lift station and replacing it with a gravity flow system. The project would likely impact 13,350 square feet of high quality, Category 2 wetland area as well as 6,600 square feet of wetland buffer area. The proposal does not clearly fall within the allowed and regulated activities established by the Wetland Regulations. Activities not listed are required to provide a wetland mitigation report and plan proposing compensation through the creation of new wetland areas at specified ratios. Section 4-3-110N allows the Administrator to grant modifications from the wetland regulations for individual cases. The Department Administrator shall first find that a specific reason makes the strict letter of this Code impractical, and that the minor modification is in conformity with the intent and purpose of this code, and that such modification: a. Will still meet the objectives of environmental protection, safety, function and maintainability intended by the Code requirements, based upon sound scientific judgment; b. Will not be injurious to other property(ies) in the vicinity; c. Result in no net loss of wetland or buffer area and function and value from that approved in the original project plan; d. Will be made prior to detailed engineering and design, such as during site plan review, short plat, preliminary plat approval or the pre-application phase of planned unit development; and e. Will be documented and entered as part of the official wetland permit file. Background A Wetland Delineation Report, dated December 1996, was prepared by Entranco, Inc. and submitted with the Higate Lift Station land use application. The report was accompanied with a letter, dated August 16, 1999, which states the report is still valid based on current site conditions. According to the report, the site contains a high quality, Category 2 wetland involving scrub-shrub vegetation delineated at up to 8 acres in size. The wetland is directly connected to the Higate Creek corridor and is fed by surrounding seeps in several locations. The proposed 8-inch sanitary sewer line would be installed by standard open trenching within a 30-foot wide construction and utility easement, which bisects three single family properties. The construction corridor would likely impact approximately 13,350 square feet of wetland area and approximately 6,600 square feet of wetland buffer area. H:\DIVISION.S\DEVELOP.SER\DEV&PLAN.I NG\Projects\99-088.LN\wetmod.doc RMC section 4-3-110K of the Wetland Regulations lists specified allowed and regulated activities within designated wetland areas and buffers. These activities are permitted provided disturbed areas are immediately restored. All other proposed activities are required to provide a wetland mitigation report and plan proposing compensation through the creation of new wetland areas at specified ratios. Although the project proposes to immediately restore all disturbed areas to pre-existing conditions, including reseeding with a wetland seed mix, the proposed utility line installation is not clearly listed under the regulation's allowed activities. If not considered an allowed activity, the project would be required to create new wetland areas at a ratio of 2 times the area altered (approximately 26,700 square feet). The proposed utility line is, however, closely associated with an allowed activity. Therefore, a wetland modification request has been included with the application in order to establish this specific proposal as an allowed and regulated activity in the wetland area and buffer. According to the Wetland Report submitted with the application, the proposal is not anticipated to result in permanent impacts to the wetland. The report includes recommendations for temporary construction impacts resulting from the project, such as the establishment of clearing limit fencing, protection of trees, methods for cutting vegetation to encourage rapid regrowth, and keeping stockpile soils areas away from wetlands areas. In order to mitigate the short term impacts to the wetland area and buffer, staff has recommended the applicant comply with the conceptual mitigations contained within the wetland report as part of the Threshold Determination of Non- Significance—Mitigated. The City's issuance of a Threshold Determination for the project would be contingent upon the approval of the subject modification request. In the event the modification is not approved, a wetland mitigation report and plan would be required and a threshold determination would be recommended after the mitigation plan is reviewed. In addition to the approval of the modification, the project would be required to obtain approvals under separate permitting requirements for Department of Fish and Wildlife Hydraulic Project Approval Permit (HPA),Army Corp of Engineers Section 404 permit, and Department of Ecology Water Quality Certification. Analysis 1.) Will still meet the objectives of environmental protection, safety,function and maintainability intended by the Code requirements, based upon sound scientific judgment. Subsection K of the City's Wetland Regulations provides a list of allowed activities within wetland areas and buffers. The following is included as an allowed activity under the regulations: Normal and routine maintenance and repair of any existing public or private uses and facilities where no alteration of the wetland or additional fill materials will be placed. The use of heavy construction equipment shall be limited to utilities and public agencies that require this type of equipment for normal and routine maintenance and repair of existing utility or public structures and rights-of-way. In every case,wetland impacts shall be minimized and disturbed areas shall be restored during and immediately after the use of construction equipment (4-3-110K1 d). Essentially, the proposal is to perform modifications to an existing sanitary sewer system. Similar to the proposed gravity line, the lift station is located within the boundary of a Category 2 wetland. The existing facility has reached the end of its service life. The replacement of the lift station with a gravity sewer line could be considered maintenance to an existing public facility where it would otherwise not be able to provide adequate service. The proposal should, therefore, be included as an allowed activity under the provision listed above. H:\DIVISION.S\DEVELOP.SER\DEV&PLAN.I NG\Projects\99-088.LN\wetmod.doc The intent of the Wetland Regulation's requirements for wetland replacement is to provide compensation when a project results in a permanent loss of wetland area. The subject sewer line proposal would only result in temporary construction impacts, which would be immediately mitigated through restoration measures. Therefore, the project would result in no net loss of wetland area. If the proposal is not considered an allowed and regulated activity within wetland areas and buffers, the project would be required to create approximately 26,700 square feet of new high quality, Category 2 wetland areas. It would be unduly burdensome to require the project to create additional wetland areas in order to offset temporary, not permanent, losses. It would be more appropriate to require the project to comply with the measures recommended in the submitted wetland report during site preparation and construction. 2.) Will not be injurious to other property(ies) in the vicinity. The proposed activity would remain within established construction and utility easements. Temporary short-term impacts may result from the initial construction of the facility. However, the surrounding properties are anticipated to benefit from improved sanitary sewer system. 3.) Result in no net loss of wetland or buffer area and function and value from that approved in the original project plan. As stated under criterion number one, the project is not anticipated to result in permanent impacts to the wetland areas or buffers. Therefore, no net loss of wetland or buffer area and function and value would occur. 4.) Will be made prior to detailed engineering and design, such as during site plan review, short plat, preliminary plat approval or the pre-application phase of planned unit development. The modification request has been made prior to detailed engineering and design of the gravity sewer line. The final design shall incorporate all SEPA and regulatory agency requirements. 5.) Will be documented and entered as part of the official wetland permit file. The modification will be documented and entered as part of the official land use file for the project. Recommendation Staff recommends approval of the wetland modification request to allow for the installation of the proposed 8-inch sanitary sewer line as an allowed and regulated activity under the Wetland Regulations. cc: Jennifer Henning H:\DIVISION.S\DEVELOP.SER\DEV&PLAN.ING\Projects\99-088.LN\wetmod.doc CITY OF RENTON PLANNING/BUILDING/PUBLIC WORKS MEMORANDUM DATE: 2/14/2000 TO: Leslie Nishihira FROM: John Hobson SUBJECT: Higate Lift Station Elimination Project: Request for Modification of Wetland Regulations The City's Wastewater Utility is seeking a modification to the City's Wetland regulations under Section 4-3-110 subsection"N" for construction of a new sewer main through a wetland. The City's Higate Sewage Lift Station is currently located on NE 20th St. approximately 400 feet east of the intersection of NE 20`h St. and Jones Avenue NE. The lift station is also located within the boundary of a class 2 wetland. This lift station has reached the end of its service life. The Wastewater Utility proposes to remove the existing lift station and replace it with an 8"diameter gravity sewer system. This system will begin within the roadway of NE 20th St., adjacent to the existing lift station, and proceed approximately 612 feet north through a class 2 wetland and its buffer. The new main will then proceed west approximately 409 feet through the wetland and its buffer to an existing manhole in the roadway of Jones Avenue NE. The project proposes to utilize standard open trenching for installation of the new sewer line. The trench will be backfilled with crushed rock to a point that is 2 feet above the crown of the pipe. Native material will then be replaced to the top of the trench. This method will allow the subsurface waters to continue to flow as they did before the construction and will also allow the native vegetation to resume growth along the trench. As part of the project, only one manhole will be installed outside of the roadways. This manhole will be installed at the angle point in the new sewer and will be located outside of the wetland and buffer. The City's maintenance division reviewed this portion of the design. They indicated that they would be able to service the lines from Jones Ave NE and NE 20th St so this should not present a problem. The design also incorporates the use of 7 CDF trench plugs to prevent the piping of groundwater along the trench line. The Wastewater Utility believes that due to its design concept for the new sewer,the proposed project will not result in any loss of wetland or buffer and will continue to function as is does prior to construction. Final design of the project shall incorporate all SEPA and regulatory agency requirements. This request for modification and any other documentation will be entered as part of the City's SEPA file. A copy of the preliminary plans have been attached for your information. cc: Lys Homsby \\CENTRAL\SYS2\DEPTS\PBP W\DIVI SION.S\UTILITIE.S\DOCS\2000-067.doc\jdh — ,-Mies / 50' VrL1LAN0 PILFER 80 40 0 80 _--_ 160 f In VT In. -'Cl rn 7 S I W ( 1 ) nte.t rrvt.e • N.ATI Sewer Construction Easement i I{p ,,r� , f I " Cr('a m. r It tr �r I a -• '_ ----- -`- --- —--—to . E �.« _�.:,�z-_ -.----: !-, 1 ( tray'-^ 4.___r_.___r,, .-___m____N_____ 7 ----\ Mr,PIM -IIM \ -L-,1 « 1 � , 11(864,11 r..1Nb MOP•C.t.O.-.arc 4 N1 0 0 0- I ' phMnnwr I C tu, MA POI J� iq yI ` ` /[M1tIa tn p pSS r —' ' i(;a WETLAND % un.a.O t E a i t Ya a cm Jo 4 , .{ VI % --T- - - o o 1 1 7:� u.a. . 4. 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Box 330310 Secretary of Transportation Seattle,WA 98133 9710 (206)440-4000 February 29, 2000 oFVF<op Lesley Nishihira A , %I/74�Ni�g City of Renton Q3 Development Services Division 9'le ?QQQ 1055 S Grady Way cF/�/F Renton, WA 98055-3232 RE: SR 405, MP 5.05, CS 1743 Higate Lift Station, LUA-99-088,ECF Dear Ms.Nishihira: Thank you for giving us the opportunity to review the Notice of Application for the Higate Lift Station,which is located at 1800 NE 20th St& 2120 Jones Ave NE/NE 20th St and Jones Ave NE ROWs in Renton. We have reviewed the subject document and have no comments. The project will not have significant impact on the state highway system. If you have any questions, please call John Collins at(206)440-4915. Sincerely, . et,,,_ Craig J. Stone, P.E. Area Administrator- South King CJS:jc JTC cc: file King County DEVELOPMENT PLANNING CITY OF RENTON Wastewater Treatment Division Environmental Planning FEB 2 8 2000 Department of Natural Resources 201 SouthJackson Street M.S. AR-0505 RECEIVED Seattle,le,WA 98104-3855 February 25, 2000 Lesley Nishihira, Project Manager Development Services Division City of Renton 1055 South Grady Way Renton,WA 98055 RE: Higate Lift Station (LUA-99-088,ECF) Dear Ms. Nishihira: The King County Wastewater Treatment Division has reviewed the February 15, 2000, Notice of Application and Proposed Determination of Non-Significance Mitigated for the Higate Lift Station. The notice indicates that the City of Renton is proposing to replace the Higate Sewer Lift Station with a gravity sewer system. Please note that before you begin work, construction drawings and specifications must be submitted to King County for engineering review and Local Public Agency approval. Please submit the drawings to Eric Davison, CIP-Civil/Architectural Section,MS KSC-NR-0508, at the address above, for review and approval prior to construction. Thank you for the opportunity to review and comment on this proposal. If you have questions, I can be reached at (206) 684-1227. Sincerely, Barbara Questad Environmental Planner cc: Eric Davison, CIP Civil/Architectural Section • 1c1,1•' • • • City of Renton Department of Planning/Building/Public works �, ENVIRONMENTAL & DEVELOPMENT APPLICATION REVIEW SHEE REVIEWING DEPARTMENT: r�ljL� COMMENTS DUE: FEBRUARY 29, 2000 APPLICATION NO: LUA-99-088,ECF DATE CIRCULATED: FEBRUARY 15, 2000 APPLICANT: City of Renton/Utilities Dept. (,John Hobson) PROJECT MANAGER: Lesley Nishihira ç PROJECT TITLE: Higate Lift Station WORK ORDER NO: 45150 LOCATION: 1800 NE 20th Street & 2120 Jones Avenue NE/NE 20th Street and Jones Avenue NE Right-of-Ways (ROWs) SITE AREA: 15,210 sq.f. of easement/1,080 sq.ft. of ROW BUILDING AREA(gross): N/A SUMMARY OF PROPOSAL: The Utilities Section of the P/B/PW Department is proposing to eliminate the Higate Sewer Lift Station and replace it with a gravity sewer system. The new 8"gravity sewer line will be installed near NE 20 h Street and Jones Avenue NE, then extended north for 646 feet and then west for 440 feet where it will connect to an existing sanitary sewer manhole in Jones Avenue NE. The project includes the placement of four new sewer manholes and asphalt restoration for the disturbed areas. Approximately 814 feet of the proposed sewer line will be located within a Category 2 wetland and its 50-foot buffer. A modification to the wetland regulations is also requested in order to allow the proposed activity in wetland and wetland buffer areas. A. ENVIRONMENTAL IMPACT(e.g. Non-Code) COMMENTS Element of the Probable Probable More Element of the Probable Probable More Environment Minor Major Information Environment Minor Major Information Impacts Impacts Necessary Impacts Impacts Necessary Earth Housing Air Aesthetics _ Water Light/Glare Plants Recreation Land/Shoreline Use Utilities Animals Transportation Environmental Health Public Services Energy/ Historic/Cultural Natural Resources Preservation _ Airport Environment 10,000 Feet 14,000 Feet d of n.6 . B. POLICY-RELATED COMMENTS C. CODE-RELATED COMMENTS We have reviewed this application with particular attention to those areas in which we have expertise and have identified areas of probable impact or areas where additional information is needed to properly assess this proposal. L- ki/ug e�.4 2-24-6-6 Signature of Director or ut orized Representative Date devapp Rev.10/93 City of Renton Department of Planning/Building/Public vrurks ENVIRONMENTAL & DEVELOPMENT APPLICATION REVIEW SHEET REVIEWING DEPARTMENT: V\001tC_ ADCdr,r4titL )COMMENTS DUE: FEBRUARY 29, S + ,r,,:••.•. APPLICATION NO: LUA-99-088,ECF DATE CIRCULATED: FEBRUARY 15, 2i.0 .' tzti APPLICANT: City of Renton/Utilities Dept. (John Hobson) PROJECT MANAGER: Lesley Nishihir- e8 j PROJECT TITLE: Higate Lift Station WORK ORDER NO: 45150 aEON „� 6<UO0 No S GHo Ffr LOCATION: 1800 NE 20th Street & 2120 Jones Avenue NE/NE 20th Street and Jones Avenue NE Right-. .r v�; p) SITE AREA: 15,210 sq.f. of easement/1,080 sq.ft.of ROW BUILDING AREA(gross): N/A BAN"/NG SUMMARY OF PROPOSAL: The Utilities Section of the P/B/PW Department is proposing to eliminate the Higate Sewer Lift Station and replace it with a gravity sewer system. The new 8"gravity sewer line will be installed near NE 20th Street and Jones Avenue NE, then extended north for 646 feet and then west for 440 feet where it will connect to an existing sanitary sewer manhole in Jones Avenue NE. The project includes the placement of four new sewer manholes and asphalt restoration for the disturbed areas. Approximately 814 feet of the proposed sewer line will be located within a Category 2 wetland and its 50-foot buffer. A modification to the wetland regulations is also requested in order to allow the proposed activity in wetland and wetland buffer areas. A. ENVIRONMENTAL IMPACT(e.g. Non-Code) COMMENTS Element of the Probable Probable More Element of the Probable Probable More Environment Minor Major Information Environment Minor Major Information Impacts Impacts Necessary Impacts Impacts Necessary Earth Housing Air Aesthetics Water Light/Glare Plants Recreation Land/Shoreline Use Utilities Animals Transportation Environmental Health Public Services Energy/ Historic/Cultural Natural Resources Preservation Airport Environment 10,000 Feet 14,000 Feet B. POLICY-RELATED COMMENTS IV O e o c.i C t t.,:-,S U is3 . L`O� �_ SZ 6,11--r k r c O 64-IN I N" C. CODE-RELATED COMMENTS We have reviewed this application with particular attention to those areas in which we have expertise and have identified areas of probable impact or areas w ere ad .' nal in mation is needed to properly assess this proposal. i 242./KH Signature of Di//e or or Authored Representative Date devapp 1 Rev.10/93 City of Re....,.. Department of Planning/Building/Public ENVIRONMENTAL & DEVELOPMENT APPLICATION REVIEW SHEET REVIEWING DEPARTMENT. PLVia COMMENTS DUE: FEBRUARY 29, 2000 APPLICATION NO: LUA-99-088,ECF DATE CIRCULATED: FEBRUARY 15,2000 APPLICANT: City of Renton/Utilities Dept. (John Hobson) PROJECT MANAGER: Lesley Nishihira PROJECT TITLE: Higate Lift Station WORK ORDER NO: 45150 LOCATION: 1800 NE 20th Street&2120 Jones Avenue NE/NE 20th Street and Jones Avenue NE Right-of-Ways (ROWs) SITE AREA: 15,210 sq.f.of easement/ 1,080 sq.ft.of ROW BUILDING AREA(gross): N/A SUMMARY OF PROPOSAL: The Utilities Section of the P/B/PW Department is proposing to eliminate the Higate Sewer Lift Station and replace it with a gravity sewer system. The new 8"gravity sewer line will be installed near NE 20 h Street and Jones Avenue NE, then extended north for 646 feet and then west for 440 feet where it will connect to an existing sanitary sewer manhole in Jones Avenue NE. The project includes the placement of four new sewer manholes and asphalt restoration for the disturbed areas. Approximately 814 feet of the proposed sewer line will be located within a Category 2 wetland and its 50-foot buffer. A modification to the wetland regulations is also requested in order to allow the proposed activity in wetland and wetland buffer areas. A. ENVIRONMENTAL IMPACT(e.g. Non-Code) COMMENTS Element of the Probable Probable More Element of the Probable Probable More Environment Minor Major Information Environment Minor Major Information Impacts Impacts Necessary Impacts Impacts Necessary Earth Housing Air Aesthetics Water Light/Glare Plants Recreation Land/Shoreline Use Utilities Animals Transportation Environmental Health Public Services Energy/ Historic/Cultural Natural Resources Preservation Airport Environment 10,000 Feet 14,000 Feet ti� B. POLICY-RELATED COMMENTS C. CODE-RELATED COMMENTS aVIL c)113 14°°721 • We have reviewed this application with particular attention to those areas in which we have expertise and have identified areas of probable impact or areas where additional information is eeded to properly assess this proposal. 6/2"aaj c2.7/ 7/4 Signature of Director or Au honzed Representative Date devapp Rev.10/93 City of—.on Department of Planning/Building/PubIt ..urks ENVIRONMENTAL & DEVELOPMENT APPLICATION REVIEW SHEET REVIEWING DEPARTMENT: i\� t'rcu ,chcti s, COMMENTS DUE: FEBRUj i �E, OE WI i APPLICATION NO: LUA-99-088,ECF DATE CIRCULATED: FEBRU' "I�� ,2000 APPLICANT: City of Renton/Utilities Dept. (John Hobson) PROJECT MANAGER: Lesley 11 ra FEB 1 5 2nnn ', / PROJECT TITLE: Higate Lift Station WORK ORDER NO: 45150 _ j LOCATION: 1800 NE 20thStreet & 2120 Jones Avenue NE/NE 20th Street and Jones Aven e NE Ri , f��/ T ROWs1) SITE AREA: 15,210 sq.f. of easement/ 1,080 sq.ft. of ROW BUILDING AREA(gross): N/A - SUMMARY OF PROPOSAL: The Utilities Section of the P/B/PW Department is proposing to eliminate the Higate Sewer Lift Station and replace it with a gravity sewer system. The new 8"gravity sewer line will be installed near NE 20th Street and Jones Avenue NE, then extended north for 646 feet and then west for 440 feet where it will connect to an existing sanitary sewer manhole in Jones Avenue NE. The project includes the placement of four new sewer manholes and asphalt restoration for the disturbed areas. Approximately 814 feet of the proposed sewer line will be located within a Category 2 wetland and its 50-foot buffer. A modification to the wetland regulations is also requested in order to allow the proposed activity in wetland and wetland buffer areas. A. ENVIRONMENTAL IMPACT(e.g. Non-Code) COMMENTS Element of the Probable Probable More Element of the Probable Probable More Environment Minor Major Information Environment Minor Major Information Impacts Impacts Necessary Impacts Impacts Necessary Earth Housing Air Aesthetics Water Light/Glare Plants Recreation Land/Shoreline Use Utilities Animals Transportation Environmental Health Public Services Energy/ Historic/Cultural Natural Resources Preservation Airport Environment 10,000 Feet 14,000 Feet I, B. POLICY-RELATED COMMENTS /i l 4,. " + C. CODE-RELATED COMMENTS We have rev wed this applicati With particular attention to those areas in which we have expertise and have identified areas of probable impact or areas where dditional informal. needed to properly assess this proposal. 00 Signature o Director or Authorized R esentative Date devapp Rev.10/93 City of i—.on Department of Planning/Building/Publi_ .._Irks ENVIRONMENTAL & DEVELOPMENT APPLICATION REVIEW SHEET REVIEWING DEPARTMENT: 1 COMMENTS DUE: FEBRUARY 29, 21*(bc RENT(' APPLICATION NO: LUA-99-088,ECF DATE CIRCULATED: FEBRUARY 15, 2000 1=r,•Pn/ rI APPLICANT: City of Renton/Utilities Dept. (John Hobson) PROJECT MANAGER: Lesley Nishihira LQQQ PROJECT TITLE: Higate Lift Station WORK ORDER NO: 45150 ‘JUIILI.11140 LOCATION: 1800 NE 20th Street & 2120 Jones Avenue NE/NE 20th Street and Jones Avenue NE Right-of-Ways (ROWs) SITE AREA: 15,210 sq.f. of easement/1,080 sq.ft. of ROW BUILDING AREA(gross): N/A SUMMARY OF PROPOSAL: The Utilities Section of the P/B/PW Department is proposing to eliminate the Higate Sewer Lift Station and replace it with a gravity sewer system. The new 8"gravity sewer line will be installed near NE 20th Street and Jones Avenue NE, then extended north for 646 feet and then west for 440 feet where it will connect to an existing sanitary sewer manhole in Jones Avenue NE. The project includes the placement of four new sewer manholes and asphalt restoration for the disturbed areas. Approximately 814 feet of the proposed sewer line will be located within a Category 2 wetland and its 50-foot buffer. A modification to the wetland regulations is also requested in order to allow the proposed activity in wetland and wetland buffer areas. A. ENVIRONMENTAL IMPACT(e.g. Non-Code) COMMENTS Element of the Probable Probable More Element of the Probable Probable More Environment Minor Major Information Environment Minor Major Information Impacts Impacts Necessary Impacts Impacts Necessary Earth Housing Air Aesthetics Water Light/Glare Plants Recreation Land/Shoreline Use Utilities Animals Transportation Environmental Health Public Services Energy/ Historic/Cultural Natural Resources Preservation Airport Environment 10,000 Feet 14,000 Feet B. POLICY-RELATED COMMENTS C. CODE-RELATED COMMENTS Ai GvJMWie We have reviewed this application with particular attention to those areas in which we have expertise and have identified areas of probable impact or areas where additional informaatioon is needed to properly assess this proposal. I� U,(2,7( z/7 Signature of Director or Authorized Representative Date devapp Rev.10/93 City of Department of Planning/Building/Pubh Irks ENVIRONMENTAL & DEVELOPMENT APPLICATION REVIEW SHEET REVIEWING DEPARTMENT: ` jLsI�e� hb V� COMMENTS DUE: FEBRUARY 29, 200l R�ENTOt� i n APPLICATION NO: LUA-99-088,ECF DATE CIRCULATED: FEBRUARY 15, 2000 FEB 6 nog APPLICANT: City of Renton/Utilities Dept. (John Hobson) PROJECT MANAGER: Lesley Nishihira PROJECT TITLE: Higate Lift Station WORK ORDER NO: 45150 LJIILUIII4U DIVISION LOCATION: 1800 NE 20th Street& 2120 Jones Avenue NE/NE 20th Street and Jones Avenue NE Right-of-Ways (ROWs) SITE AREA: 15,210 sq.f.of easement/ 1,080 sq.ft. of ROW BUILDING AREA(gross): N/A SUMMARY OF PROPOSAL: The Utilities Section of the P/B/PW Department is proposing to eliminate the Higate Sewer Lift Station and replace it with a gravity sewer system. The new 8"gravity sewer line will be installed near NE 20th Street and Jones Avenue NE, then extended north for 646 feet and then west for 440 feet where it will connect to an existing sanitary sewer manhole in Jones Avenue NE. The project includes the placement of four new sewer manholes and asphalt restoration for the disturbed areas. Approximately 814 feet of the proposed sewer line will be located within a Category 2 wetland and its 50-foot buffer. A modification to the wetland regulations is also requested in order to allow the proposed activity in wetland and wetland buffer areas. A. ENVIRONMENTAL IMPACT(e.g. Non-Code) COMMENTS Element of the Probable Probable More Element of the Probable Probable More Environment Minor Major Information Environment Minor Major Information Impacts Impacts Necessary Impacts Impacts Necessary Earth Housing Air Aesthetics Water Light/Glare Plants Recreation Land/Shoreline Use Utilities Animals Transportation Environmental Health Public Services Energy/ Historic/Cultural Natural Resources Presentation Airport Environment 10,000 Feet 14,000 Feet B. POLICY-RELATED COMMENTS C. CODE-RELATED COMMENTS IUO G°WWIew( We have reviewed this application with particular attention to those areas in which we have expertise and have identified areas of probable impact or areas where additional information is needed to properly assess this proposal.-1 ' .// 40 A)ij Signature of Director or Authorized Representative Date devapp Rev.10/93 City of Renton Department of Planning/Building/Public Works ENVIRONMENTAL 8 DEVELOPMENT APPLICATION REVIEW SHEET REVIEWING DEPARTMENT: uI/-a[e,I�fllty�lXN COMMENTS DUE: FEBRUARY 29, 2O6'OICR APPLICATION NO: LUA-99-088,EGF DATE CIRCULATED: FEBRUARY 15, 200% ^4►,'". APPLICANT: City of Renton/Utilities Dept. (John Hobson) PROJECT MANAGER: Lesley Nish 75 PROJECT TITLE: Higate Lift Station _ WORK ORDER NO: 45150 /�'�//yc). 2Uo® 4j LOCATION: 1800 NE 20th Street&2120 Jones Avenue NE/NE 20th Street and Jones Avenue NE Right-of-Ways' s) tv SITE AREA: 15,210 sq.f.of easement/ 1,080 sq.ft.of ROW BUILDING AREA(gross): N/A SUMMARY OF PROPOSAL: The Utilities Section of the P/B/PW Department is proposing to eliminate the Higate Sewer Lift Station and replace it with a gravity sewer system. The new 8"gravity sewer line will be installed near NE 20th Street and Jones Avenue NE, then extended north for 646 feet and then west for 440 feet where it will connect to an existing sanitary sewer manhole in Jones Avenue NE. The project includes the placement of four new sewer manholes and asphalt restoration for the disturbed areas. Approximately 814 feet of the proposed sewer line will be located within a Category 2 wetland and its 50-foot buffer. A modification to the wetland regulations is also requested in order to allow the proposed activity in wetland and wetland buffer areas. A. ENVIRONMENTAL IMPACT(e.g. Non-Code) COMMENTS Element of the Probable Probable More Element of the Probable Probable More Environment Minor Major Information Environment Minor Major Information Impacts Impacts Necessary Impacts Impacts Necessary Earth Housing Air Aesthetics Water Light/Glare Plants Recreation Land/Shoreline Use Utilities Animals Transportation Environmental Health Public Services Energy/ Historic/Cultural Natural Resources Preservation Airport Environment 10,000 Feet 14,000 Feet B. POLICY-RELATED COMMENTS C. CODE-RELATED COMMENTS No cc2y14vl1-t/4 We have reviewed this application with particular attention to those areas in which we have expertise and have identified areas of probable impact or areas where additional information is needed to properly assess this proposal. I )&(i. 7 a) ' . //6/(90 Signature of Director or Authorized Representative Date devapp Rev.10/93 City of 1....... n Department of Planning/Building/Public —Tics ENVIRONMENTAL & DEVELOPMENT APPLICATION REVIEW SHEET REVIEWING DEPARTMENT: OS(VAACAV \ VII tLel) COMMENTS DUE: FEBRUARY 29, 2000 APPLICATION NO: LUA-99-088,ECF DATE CIRCULATED: FEBRUARY 15, 200(ZI'�'y�RENTON APPLICANT: City of Renton/Utilities Dept. (John Hobson) PROJECT MANAGER: Lesley Nishihira 11C�'�I1frry PROJECT TITLE: Higate Lift Station WORK ORDER NO: 45150 FEB 1 2000 LOCATION: 1800 NE 20th Street& 2120 Jones Avenue NE/NE 20th Street and Jones Avenue NL ar t-of-Wayys ROWs) if1L'UII4U ►M VISION SITE AREA: 15,210 sq.f. of easement/ 1,080 sq.ft.of ROW BUILDING AREA(gross): N/A SUMMARY OF PROPOSAL: The Utilities Section of the P/B/PW Department is proposing to eliminate the Higate Sewer Lift Station and replace it with a gravity sewer system. The new 8"gravity sewer line will be installed near NE 20`h Street and Jones Avenue NE, then extended north for 646 feet and then west for 440 feet where it will connect to an existing sanitary sewer manhole in Jones Avenue NE. The project includes the placement of four new sewer manholes and asphalt restoration for the disturbed areas. Approximately 814 feet of the proposed sewer line will be located within a Category 2 wetland and its 50-foot buffer. A modification to the wetland regulations is also requested in order to allow the proposed activity in wetland and wetland buffer areas. A. ENVIRONMENTAL IMPACT(e.g. Non-Code) COMMENTS Element of the Probable Probable More Element of the Probable Probable More Environment Minor Major Information Environment Minor Major Information Impacts Impacts Necessary Impacts Impacts Necessary Earth Housing Air Aesthetics Water Light/Glare Plants Recreation Land/Shoreline Use Utilities Animals Transportation Environmental Health Public Services Energy/ Historic/Cultural Natural Resources Preservation Airport Environment 10,000 Feet 14,000 Feet B. POLICY-RELATED COMMENTS C. CODE-RELATED COMMENTS We have reviewed this application with particular attention to those areas in which we have expertise and have identified areas of probable impact or areas wh additional information is needed to properly assess this proposal. 2-7 4-,70-C-, Si ature of Directo or Authorii d Representative 1 Date devapp Rev.10/93 CITY OF RENTON DEVELOPMENT SERVICES DIVISION LIST OF SURROUNDING PROPERTY OWNERS within 300 feet of the subject site PROJECT NAME: 7y/c A re— L'1--7'7T v.-f iiJ/ I Cr..1 APPLICATION NO: LUA 'c19 Q0� The following is a list of property owners within 300 feet of the subject site. The Development Services Division will notify these individuals of the proposed development. NAME ADDRESS ASSESSOR'S PARCEL NUMBER DEvELOP-ME R NTON 1P1G CITY OF FEB g 2000 RECEIVED (Attach additional sheets, if necessary) (Continued) NAME ADDRESS ASSESSOR'S PARCEL NUMBER / Applicant Certification I, J0 o.I ��T3So,...[/ , hereby certify that the above list(s) of adjacent property (Print Name) ����11111111//,� owners and their addresses were obtained from: •‘G FERkh,,/, • Q'•••1SSIofCAG� -e'City of Renton Technical Services Record` ID Title Company Records �.c OT/i; �o ❑ g County Assessors Records N�- - �N.�. PUBL' Z� Signed Date Cici ��/I •••• g, 6:•*-4c�`���� (Applicant) 4/III 1 �i`\e:NOTARY ATTESTED: Subscribed and sworn before me, a Notary FAIblic, in and for the State of Washington, residing at on the� day of QS,�,c 2� , 19�c1 . Signed da,/_41. C• d [�� (Notary Public)/ '"'"`For City of Renton Use*** CERTIFICATION OF MAILING �� MARILYN11 AR IUBtIC I, 5tuaki(�- ��' , hereby certify that notices of the proposed app I (City Employee) HEFF VV 11 each listed property owner on41(.0 'n) STATE OF WASHINGTON COMMISSION EXPIRES Signed SCUALtA. Se -co Date: 2- ((p JUNE 29,2003 NOTARY ATTEST: Subscribed and sworn before me, a Notary Publlq, in ana for the State of Washington residing atP,P & 6.‘ on the )g r'" day of mac,.& 1 7063 Signed '1 Q�u � C(irr• rs,pr> op doc REV 07/98 MARILYN KAMCHEFF MY APPOINTMENT EXPIRES:6-29-03 HILLEGAS CLYDE W KAISER GERALD R+KRISTEN L ELDRIDGE DEBORAH H STEEDMAN SHAARI L 1700 MONTEREY CT NE 1708 MONTEREY CT NE 1632 MONTEREY CT NE RENTON WA 98056 RENTON WA 98056 RENTON WA 98056 STUART ROBERT A+CATHERINE 0 ROY JOANNA S HUMPHREY MARK J 1716 MONTEREY CT NE 1724 MONTEREY CT NE 1725 MONTEREY CT NE RENTON WA 98056 RENTON WA 98056 RENTON WA 98056 CORWIN ROBERT C+JOYCE TAKASHIMA KIYOKO RIPLEY JOHN I+CONSTANCE B 1717 MONTEREY CT NE 1709 MONTEREY CT NE 4310 85TH AVE NE RENTON WA 98056 RENTON WA 98056 MERCER ISLAND WA 98040 SUNSET HELLS HOA SUNSET HILLS HOA DELAPP DERRELL&ISABELL C/O JOEL T HUFF C/O JOEL T HUFF 2409 KENNEWICK AVE NE 2421 KENNEWICK AVE NE 2421 KENNEWICK AVE NE RENTON WA 98056 RENTON WA 98056 RENTON WA 98056 WOLF DELORIS J BROOKS CARL E COWAN JACK L+BETTY 2415 KENNEWICK AVE NE 2414 KENNIWICK PL NE 905 LYNNWOOD AVE NE RENTON WA 98056 NEWCASTLE WA 98056 RENTON WA 98056 COWAN JACK L+BETTY COWAN JOHN DINKINS VERONICA B+STEVEN J 905 LYNNWOOD AVE NE 1830 NE 24TH 2413 KENNEWICK PL NE RENTON WA 98056 RENTON WA 98056 RENTON WA 98056 TYLER JERRY ALLEN SR+BEVERL KARTES CRAIG J+KATHRYN D BUCK GARY R+M STACY 2419 KENNEWICK PL NE 2418 KENNEWICK AVE NE 2412 KENNEWICK AVE NE RENTON WA 98056 RENTON WA 98056 RENTON WA 98056 QUACH CHAU V+MARIA P ZETTERBERG KEVIN+BARBARA BAKKO JOHNNY R 2406 KENNEWICK PL NE 2400 KENNEWICK AVE NE 1922 NE 24TH ST RENTON WA 98058 RENTON WA 98058 RENTON WA 98055 MCKENZIE DONALD R LARSON JERRY 0 WILGUS MICHAEL R 2424 MONTEREY NE 2418 MONTEREY AVE NE 2412 MONTEREY AVE NE RENTON WA 98056 RENTON WA 98055 RENTON WA 98056 PO TSANG W AMICK DUANE W+PATRICIA M HANSON JAMES R+MARGARET L 13707 NE 6TH PL#A2-202 1601 NE 24TH ST 2225 JONES AVE NE BELLEVUE WA 98005 RENTON WA 98055 RENTON WA 98055 AUNGER STUART L+JUDITH I HUYNH TU PHUONG RATRAY R N 2224 HIGH AVE NE 2300 HIGH AVE NE 2301 JONES AVE NE RENTON WA 98056 RENTON WA 98056 RENTON WA 98055 ULRICH MARTIN J PRESTON VIRGINIA C STEWART KENNETH JACKSON JR 2209 JONES AVE NE 2217 JONES AVE NE 2132 HIGH AVE NE RENTON WA 98056 RENTON WA 98056 RENTON WA 98055 CHAVIS LYNN A BRENDEMIHL FRITZ W ULRICH DANIEL E+CAROL 2216 HIGH AVE NE 2116 HIGH AVE NE 2125 JONES AVE NE RENTON WA 98056 RENTON WA 98056 RENTON WA 98055 SPARROW WILLIAM M HOLT ESTHER L WEI LUANN KIM 2115 JONES AVE NE 2124 HIGH AVE NE 2033 JONES AVE NE RENTON WA 98056 RENTON WA 98055 RENTON WA 98056 JANE RUTH D QUINCEY ALEXANDER V &MARY SCHUMSKY DONALD 2100 HIGH AVE NE 2025 JONES AVE NE 2019 JONES AVE NE RENTON WA 98055 RENTON WA 98056 RENTON WA 98055 DOBSON WYMAN FANNING GEORGE A SCHUMSKY DONALD 821 N 1ST ST 2021 JONES AVE NE 2019 JONES AVE NE RENTON WA 98055 RENTON WA 98056 RENTON WA 98055 HAWKEN LEONA ANN BANES DENNIS R HAWKEN LEONA ANN 1917 JONES AVE NE 1909 JONES AVE NE 1917 JONES AVE NE RENTON WA 98056 RENTON WA 98056 RENTON WA 98056 JORGENSEN J J PORCELLO ANTHONY J LEMON LUCIEN W 1901 JONES AVE NE 1817 JONES AVE NE 1801 JONE AVE NE RENTON WA 98055 RENTON WA 98056 RENTON WA 98056 SPENCER GENEVIEVE BISBEE JOSEPH D+IRENE H SMITH DARRYL J 1809 JONES AVE NE 1725 JONES AVE NE 1733 JONES AVE NE RENTON WA 98056 RENTON WA 98056 RENTON WA 98055 MEADOWS DARYL+CATHLEEN PENNEY ELMER C JR DANIELS JAMES+JEAN 1633 JONES AVE NE 1625 JONES AVE NE 1707 JONES AVE NE RENTON WA 98056 RENTON WA 9805.5 RENTON WA 98056 BARKER SHARON A BUTCHER ROBERT J MORELLI F JOHN 2414 JONES AVE NE 2422 JONES AVE NE 1726 NE 24TH ST RENTON WA 98056 RENTON WA 98056 RENTON WA 98056 DIER ROBERT EDWARD BITNEY DEAN+JO WILLIAMS RODNEY N&DIANE A 1732 NE 24TH STREET 2727 MOUNTAIN VIEW AVE NORTH 2402 JONES AVE NE RENTON WA 98056 RENTON WA 98056 RENTON WA 98056 TAYLOR LORRAINE CODIGA MARIE BARTELL ROBERT H+ALINA M 220a JONES AVE NE 2216 JONES AVE NE 1725 NE 24TH ST RENTON WA 98056 RENTON WA 98055 RENTON WA 98055 SWALKO MARK A POHL CHARLES A&WINIFRED K EGAN E JOHN 2010 JONES AVE NE 2004 JONES AVE NE 2100 JONES AVE NE RENTON WA 98056 RENTON WA 98056 RENTON WA 98056 SUNDBY DOUGLAS P ARENS ROBERT F ARENS ROBERT F 1700 NE 20TH 1703 NE 20TH ST 1703 NE 20TH ST RENTON WA 98056 RENTON WA 98055 RENTON WA 98055 TOMCHICK JOHN A+LAUREL S CLARE D F JOHNSON RONALD ROGER 1900 JONES AVE NE 1818 JONES AVE NE 1824 JONES AVE NE RENTON WA 0 RENTON WA 98056 RENTON WA 98056 SKELLENGER LOIS SMITH DARRYL J COLOMBI LOUIE F+MARGUERITE 1806 JONES AVE NE 1733 JONES AVE NE 1800 JONES AVE NE RENTON WA 98055 RENTON WA 98056 RENTON WA 98056 HUEBNER ROBERT F LUNSFORD LARRY M+SUSAN ESPEY CAROL 1700 JONES AVE NE 1716 JONES AVE NE 1624 JONES AVE NE RENTON WA 98056 RENTON WA 98056 RENTON WA 98056 NGUY TRUNG KIEN LUNSFORD LARRY M+SUSAN KINZER DARRELL#13716 1720 NE 16TH ST 1716 JONES AVE NE % EXECUTIVE HOUSE INC RENTON WA 98056 RENTON WA 98056 7517 GREENWOOD AVE N SEATTLE WA 98103 UNBEDACHT JEFFREY B+CHARLYN BROWNFIELD KEITH W+DEBBIE A CORE DOUGLAS C 2120 JONES AVE NE 22021 SE 29TH PL 1828 NE 20TH RENTON WA 98056 ISSAQUAH WA 98027 RENTON WA 98055 • DENZLER CHRISTIAN R CAVE ROBERT N LONG ROCHELLE T+ERIC C 1800 NORTHEAST 20TH STREET 12518 S E 17TH ST 4131 BROOKLYN AVE NE RENTON WA 98056 BELLEVUE WA 98005 SEATTLE WA 98105 CAVE ROBERT N BLUNDRED JAMES C JR LAPLANT HOWARD H&MURIEL E 12518 S E 17TH ST 1800NE24THST 1917NE24THST BELLEVUE WA 98005 RENTON WA 98056 RENTON WA 98055 ROWE CHARLES J ZIRK LEOMA J LANDE-SHANE MARY DARLENE 1909 NE 24TH ST 1833 NE 24TH ST 9037 38TH AVE SW RENTON WA 98055 RENTON WA 98056 SEATTLE WA 98126 TORBENSON WILLADENE M BLONSKI MICHAEL D CHAMBERLAIN TIMOTHY 1836 NE 20TH ST/P 0 BOX 201 1908 NE 20TH 1832 NE 20TH RENTON WA 98057 RENTON WA 98055 RENTON WA 98056 BRAY JULIE E NELSON JAMES A FINNICUM DAINIE H+BEULAH I 14138 34TH PL S 1905 NE 20TH ST 2001 NE 20TH ST SEATTLE WA 98168 RENTON WA 98056 RENTON WA 98056 VANCE CHRISTINE B VANCE BRIAN D DAY SHIRLENE R 2129 ABERDEEN AVE NE 13811 SE 173 PL 1932 NE 20TH ST RENTON WA 98056 RENTON WA 98058 RENTON WA 98056 REDFERN RICHARD C WEIGEL VIVIAN A ISLER JAMES L 2000 NE 20TH ST 16853 SE 112TH STREET 1912 NE 20TH ST RENTON WA 98056 RENTON WA 98059 RENTON WA 98055 JELLEY ISAAC N LANDE-SHANE MARY DARLENE CARR MARK S+CARR,MICHAEL L 2009 NE 24TH ST 9037 38TH AVE SW 2309 ABERDEEN AVE NE RENTON WA 98055 SEATTLE WA 98126 RENTON WA 98056 WATSON MICHAEL DOUGLAS BENNETT RONALD D+JANE M HARRISON VIOLA M 1929 24TH ST NE 2421 MONTEREY AVE NE 2417 MONTEREY AVE NE RENTON WA 98055 RENTON WA 98056 RENTON WA 98056 SMITH RONALD L OLIVER JON A+SUSANNE E ROHDE DON B 2427 ABERDEEN NE 2409 ABERDEEN AVE NE 2401 ABERDEEN AVE NE RENTON WA 98055 RENTON WA 98056 RENTON WA 98055 RALLISON STEPHEN F+PATRICIA DYMARKOWSKI DANIEL B RIEKER GERALD L&SOUNG HEE 2016 NE 24TH ST 2020 NE 24TH 11017 101ST PL NE RENTON WA 98056 RENTON WA 98055 KIRKLAND WA 98033 CLAYPOOL SANDRA L+GOLDIE RIEKER GERALD L&SOUNG HEE RIEKER GERALD L&SOUNG HEE 2325 ABERDEEN AVE NE 11017 101ST PL NE 11017 101ST PL NE RENTON WA 98059 KIRKLAND WA 98033 KIRKLAND WA 98033 RIEKER GERALD L&SOUNG HEE RIEKER GERALD L&SOUNG HEE CARR MARK S+CARR,MICHAEL L 11017 101ST PL NE 11017 101ST PL NE 2309 ABERDEEN AVE NE KIRKLAND WA 98033 KIRKLAND WA 98033 RENTON WA 98056 CLAYPOOL SANDRA L+GOLDIE COLLINS WILLIAM V OLSON STANLEY 2325 ABERDEEN AVE NE 2201 ABERDEEN NE 2217 ABERDEEN AVE NE RENTON WA 98059 RENTON WA 98055 RENTON WA 98056 HUGHES HARRY B+JANICE J SAYRE M E ROUTSON RICHARD E+MARLENE J 2213 ABERDEEN AVE NE 2005 ABERDEEN AVE NE 460 MT JUPITER DR SW RENTON WA 98056 RENTON WA 98056 ISSAQUAH WA 98027 ROBERTO PATRICIA R JOHNSTONE LINDSEY N+KATHLEE ARCHER D 0 2123 ABERDEEN AVE NE 2119 ABERDEEN AVE NE 2127 ABERDEEN AVE NE RENTON WA 98056 RENTON WA 98056 RENTON WA 98056 GIBSON CHARLES E LARSEN MARIE L DAVIS MICHAEL 2008 NE 20TH ST 2006 NE 20TH ST 2020 NE 20TH RENTON WA 98056 RENTON WA 98055 RENTON WA 98055 BISIACK ANTOINETTE B MOORE ROSEMARY T+DAVID R ODREN MICHELE K+MULLEN 2101 ABERDEEN AVE NE 2025 ABERDEEN AVE NE JAME RENTON WA 98056 RENTON WA 98056 2030 NE 20TH ST RENTON WA 98056 • ALDER BETTY A GREEN BERLE BOSTROM THOR+KARLA 1829 ABERDEEN AVE NE 1831 ABERDEEN AVE NE 1809 ABERDEEN AVE NE RENTON WA 98056 RENTON WA 98056 RENTON WA 98056 VIG GARY DEAN+JULIANNE REED MOTE KERMIT+RAUB,VICKI L WOODIN HAROLD 1833 ABERDEEN AVE NE 1901 ABERDEEN AVE NE 1801 ABERDEEN AVE NE RENTON WA 98056 RENTON WA 98056 RENTON WA 98056 GREEN BERLE BRODKA HELMUT GLOCKNER EILEEN 1831 ABERDEEN AVE NE 12602 SE PETROVITSKY RD 1927 ABERDEEN AVE NE RENTON WA 98055 RENTON WA 98058 RENTON WA 98056 GUSTAFSON SONJA G HILLEGAS CLYDE W BECKWITH A K 1933 ABERDEEN AVE NE TAX TITLE CONT. 16688 1733 ABERDEEN AVE NE RENTON WA 98056 1632 MONTEREY COURT NE RENTON WA 98056 RENTON WA 98056 BECKWITH A K COCHRAN JILLENE NOLL ZITA M 1733 ABERDEEN AVE NE 1709 ABERDEEN AVE NE 1701 ABERDEEN AVE NE RENTON WA 98056 RENTON WA 98056 RENTON WA 98056 CHRISTENSON CHARLES D COOPER LAWRENCE E H+COOPER PUDLO EDWARD J+JOAN KARLA A 1700 MONTEREY AVE NE 1706 MONTEREY AVE NE 1712 MONTEREY AVE E RENTON WA 98055 RENTON WA 98056 RENTON WA 98056 SWIHART MARK A+WENDY R MARTIN LARRY E+CHERIE L STOKES DUANE R+ANDERSON 1718 MONTEREY AVE NE 1802 MONTEREY AVE NE KAT RENTON WA 98056 RENTON WA 98056 1808 MONTEREY AVE NE RENTON WA 98056 CREEGAN MICHAEL P MCKILLOP STEPHEN V HAUTALA JEFF A 517 SMITHERS AVE S 1820 MONTEREY AVE NE 1904 MONTEREY AVE NE RENTON WA 98055 RENTON WA 98056 RENTON WA . 98056 VALENTINE PATRICK S R MIKO LARRY H HANADA RONALD D&MARIE S 1915 MONTEREY AVE NE 1909 MONTEREY AVE NE 14409 148TH PL SE RENTON WA 98056 RENTON WA 98056 RENTON WA 98059 SCHUEHLE RYAN WILLIAM+KIRST WOOD SAM L RIDER SUSAN E 1908 NE 19TH PL 1902 NE 19TH PL 1835 NE 20TH RENTON WA 98056 RENTON WA 98056 RENTON WA 98056 MOFFAT GARY S RUSTAD TIGE R+ST ICHLING MO HUI FERNANDO&NANCY 1903 NE 19TH PL 1909 NE 19TH PL 2105 96TH AVE NE RENTON WA 98055 RENTON WA 98056 BELLEVUE WA 98004 COPPESS MICHAEL D+LAURA L MITCHELL BRIAN A STEVENS CAMERON ETAL 12119 SE 13TH ST 1801 MONTEREY AVE NE 1721 MONTEREY AVE NE BELLEVUE WA 98005 RENTON WA 98055 RENTON WA 98055 COMBS GARY N BAKER ROBERT G+CONNIE E JANES RICHARD W 1715 MONTEREY AVE NE 1709 MONTEREY AVE NE 1906 NE 17TH PLACE RENTON WA 98056 •RENTON WA 98056 RENTON WA 98056 MILLICAN PAUL E&ROSALINDA TORKELSON KENNETH A MACKENZIE BONNIE J+ESTHER M 1826 NE 17TH PL 1820 NE 17TH PL 1817 NE 17TH PL RENTON WA 98056 RENTON WA 98056 RENTON WA 98056 THORNHILL DOUGLAS+PATRICIA THORNTON ALAN H SALAVEA MALU 1823 NE 17TH PL 1901 NE 17TH PL 1907 NE 17TH PL RENTON WA 98056 NEWCASTLE WA 98056 RENTON WA 98055 CITY OF RENTON HILL JAY G STATE OF WASHINGTON BENNETT W E 2417 JONES AVE NE 0 200 MILL AVE S RENTON WA 98055 RENTON WA 98055 GRANT GEORGE K WIEHOFF RONALD W+ALVERNA J WOODWORTH J M 2425 JONES AVE NE 1612 KENNEWICK AVE NE 1624 KENNEWICK AVE NE RENTON WA 98056 RENTON WA 98056 RENTON WA 98055 KUBOTA HISAKO SCHWAB LAURA M WIEHOFF CHARLES A&MARY E 1702 KENNEWICK AVE NE 1706 KENNWICK AVE NE 1708 KENNEWICK AVE NE RENTON WA 98055 RENTON WA 98056 RENTON WA 98056 WIEHOFF CHARLES A&MARY E MINKLER ROBERT J SWANSON ELSIE C 1708 KENNEWICK AVE NE 1701 KENNEWICK AVE NE PO BOX 2352-0352 RENTON WA 98056 RENTON WA 98055 1625 KENNEWICK AVE NE RENTON WA 98056 DUNCAN WILLIAM L STATE OF WASHINGTON CITY OF RENTON 1619 KENNEWICK AVE NE 0 BENNETT W E RENTON WA 98056 200 MILL AVE S RENTON WA 98055 'VY • Proposed Mitigation Measures: St • Q 4 1. The applicant shall comply with the recommendations listed in the Subsurface Investigation and Geotechnical • 4. Engineering Report for the Higate Sewer Project,prepared by Golder Associates on January 12,2000. .°P 2. The applicant shall comply with the recommended mitigation for temporary impacts to the wetland as listed in the Wetland Delineation Report for the Higate Sewage LA Station Elimination,prepared by Entranco in December of 1996. NOTICE OF APPLICATION AND PROPOSED DETERMINATION OF NON-SIGNIFICANCE—MITIGATED (DNS-M) DATE: February 15,2000 LAND USE NUMBER: LUA-99-088,ECF Comments on the above application must be submitted In writing to Ms.Lesley Nishihira,Project Manager,Development APPLICATION NAME: HIGATE LIFT STATION Services Division,1055 South Grady Way,Renton,WA 98055.by 5:00 PM on February 29,2000. If you have questions PROJECT DESCRIPTION: The Utilities Section of the P/B/PW Department is proposing to eliminate about this proposal or wish to be made a party of record and receive additional notication by mail,contact the project P P P 9 manager at(425)430-2770.Anyone who submits written comments will automaticallybecome a party of record and will the Higate Sewer Lift Station and replace it with a gravity sewer system. The new 8"gravity sewer line will be be notified of any decision on this project. Installed near NE 20'Street and Jones Avenue NE,then extended north for 648 feet and then west for 440 feet where It will connect to an existing sanitary sewer manhole In Jones Avenue NE. The project Includes the CONTACT PERSON: LESLEY NISHIHIRA(425)430-7270 placement of four new sewer manholes and asphalt restoration for the disturbed areas. Approximately 814 feet of the proposed sewer line will be located within a Category 2 wetland and Its 50-foot buffer. A modification to (PLEASE INCLUDE THE PROJECT NUMBER WHEN CALLING FOR PROPER FILE IDENTIFICATION I the wetland regulations Is also requested In order to allow the proposed activity in wetland and wetland buffer PROJECT LOCATION: 1800 NE 20'Sheet 8 2120 Jones Avenue NE/NE 20'Sheet and Jones Avenue NE Right-of-Ways(ROWs) OPTIONAL DETERMINATION OF NON-SIGNIFICANCE-MITIGATED(ONS-M):As the Lead Agency,the City of Renton - has determined that significant environmental impacts are unlikely to result from the proposed project.Therefore,as Inn ie im `permitted under the RCW 43.21C.110,the City of Renton is using the Optional DNS(M)process to give notice that a DNS- ii co, III, �`f�� M is likely to be issued.Comment periods for the project and the proposed ONS-M are integrated into a single comment .M II E.1 ''r:ae period.There will be no comment period following the issuance of the Threshold Determination of Non-Significance :•e. ''~'D""' ■e Mitigated(DNS-M).A 14 day appeal period will follow the issuance of the DNS-M. a I((p•n lip��er'.1:..7!YIIORli 1. PERMIT APPLICATION DATE: February 9,2000 �ri�° `- ,s1^; NOTICE OF COMPLETE APPLICATION: February 15,2000 \„je C —,._ -i'r Permits/Review Requested: SEPA Environmental Review �1_u■ '�` 111 .. 2 f q tin �dilly EM::-... na Other Permits which maybe required: Construction Permits,Modification from Wetland Regulations,Hydraulic .-;,_ ii •'O7' Illllu\;ere1R III Project Approval(HPA)from Department of Fish and Wildlife,Water w• L31 e'Oe";� Quality Modification how Department of Ecology,Nationwide Permit from o� :c'�i ;`!�::- '11 PP .l U.S.Army Corps of Engineers. R.` „'n.:G. Requested Studies: Wetland Report and Delineation,Geotechnical Report Location where application may ♦ �� tel ::` � be reviewed: Planning/Building/Public Works Division,Development Services Department. �4` : ::: ::= 1055 South Grady Way,Renton,WA 98055 _ �r e191��C :i:� + PUBLIC HEARING: N/A �`\- I_ ;='I 811Ni I •- Sr• ._ 11=e_:I=1 CONSISTENCY OVERVIEW: / 1 1 wig-!'1M• id Land Use: The subject site is designated Residential Single Family(RSF)on the Cilys I I J ♦�I Comprehensive Plan Land Use Map and Residential-8 dwelling units per acre r. ►it-- IL uillllsr.l mi R-8 on the Ci s ZoningMap.The proposal to construct a new gravitysewer .1..� .11' ( ) ND Po �` ea• ,--0 system to serve the local area,which is defined as a'small utility,is considered .c--t, a primary permitted use in the R-8 zone.The proposal is consistent with both the HIGATE UFT STATION ELIMINATION Comprehensive Plan and Zoning land use designations. VICINrtY MAP Environmental Documents that Evaluate the Proposed Project: N/A Development Regulations Used For Project Mitigation: The project will be subject to the City's SEPA Ordinance.Zoning Code,Public Works Standards,Uniform Building Code,Unifomr Fire Code,Wetland Regulations,and other applicable codes and regulations as appropriate. penmabt genmaiCI CERTIFICATION I, tt(Ai N j ih fil IYA,,hereby certify that copies of the above document were posted by me in 0 conspicuous places on or nearby the described property on -691(1) f a j ?DO U • . Signed: 2 ;1A4 /2, 4 l ATTEST: Subcribed and sworn before me,a No Public,in and for tli State of Washington residing in s ,on the rI day of )� 2O.00 L__f� 61.)-(At, 9 MARILYN KAvyt_o_J),--6 MC INGHEFF NOTARY PUBLIC MARILYN KAMCHEFF STATE OF WASHTON MY APPOINTMENT EXPIRES:6-29-03 COMMISSION EXPIRES JuNE 29, 2003 Gill• 6 in NOTICE OF APPLICATION AND PROPOSED DETERMINATION OF NON-SIGNIFICANCE - MITIGATED (DNS-M) DATE: February 15,2000 LAND USE NUMBER: LUA-99-088,ECF APPLICATION NAME: HIGATE LIFT STATION PROJECT DESCRIPTION: The Utilities Section of the P/B/PW Department is proposing to eliminate the Higate Sewer Lift Station and replace it with a gravity sewer system. The new 8" gravity sewer line will be installed near NE 20`h Street and Jones Avenue NE, then extended north for 646 feet and then west for 440 feet where it will connect to an existing sanitary sewer manhole in Jones Avenue NE. The project includes the placement of four new sewer manholes and asphalt restoration for the disturbed areas. Approximately 814 feet of the proposed sewer line will be located within a Category 2 wetland and its 50-foot buffer. A modification to the wetland regulations is also requested in order to allow the proposed activity in wetland and wetland buffer areas. PROJECT LOCATION: 1800 NE 20th Street&2120 Jones Avenue NE/NE 20`h Street and Jones Avenue NE Right-of-Ways(ROWs) OPTIONAL DETERMINATION OF NON-SIGNIFICANCE-MITIGATED(DNS-M): As the Lead Agency,the City of Renton has determined that significant environmental impacts are unlikely to result from the proposed project. Therefore,as permitted under the RCW 43.21C.110,the City of Renton is using the Optional DNS(M)process to give notice that a DNS- M is likely to be issued. Comment periods for the project and the proposed DNS-M are integrated into a single comment period. There will be no comment period following the issuance of the Threshold Determination of Non-Significance Mitigated(DNS-M). A 14 day appeal period will follow the issuance of the DNS-M. PERMIT APPLICATION DATE: February 9,2000 NOTICE OF COMPLETE APPLICATION: February 15,2000 Permits/Review Requested: SEPA Environmental Review Other Permits which may be required: Construction Permits,Modification from Wetland Regulations,Hydraulic Project Approval(HPA)from Department of Fish and Wildlife,Water Quality Modification from Department of Ecology,Nationwide Permit from U.S.Army Corps of Engineers. Requested Studies: Wetland Report and Delineation,Geotechnical Report Location where application may be reviewed: Planning/Building/Public Works Division,Development Services Department, 1055 South Grady Way,Renton,WA 98055 PUBLIC HEARING: N/A CONSISTENCY OVERVIEW: Land Use: The subject site is designated Residential Single Family(RSF)on the City's Comprehensive Plan Land Use Map and Residential—8 dwelling units per acre (R-8)on the City's Zoning Map. The proposal to construct a new gravity sewer system to serve the local area,which is defined as a"small utility",is considered a primary permitted use in the R-8 zone. The proposal is consistent with both the Comprehensive Plan and Zoning land use designations. Environmental Documents that Evaluate the Proposed Project: N/A Development Regulations Used For Project Mitigation: The project will be subject to the City's SEPA Ordinance,Zoning Code,Public Works Standards,Uniform Building Code,Uniform Fire Code,Wetland Regulations,and other applicable codes and regulations as appropriate. genmalot Proposed Mitigation Measures: 1.. The applicant shall comply with the recommendations listed in the Subsurface Investigation and Geotechnical Engineering Report for the Higate Sewer Project,prepared by Golder Associates on January 12,2000. 2. The applicant shall comply with the recommended mitigation for temporary impacts to the wetland as listed in the Wetland Delineation Report for the Higate Sewage Lift Station Elimination,prepared by Entranco in December of 1996. Comments on the above application must be submitted in writing to Ms. Lesley Nishihira, Project Manager, Development Services Division, 1055 South Grady Way,Renton,WA 98055,by 5:00 PM on February 29,2000. If you have questions about this proposal, or wish to be made a party of record and receive additional notification by mail, contact the project manager at(425)430-2770. Anyone who submits written comments will automatically become a party of record and will be notified of any decision on this project. CONTACT PERSON: LESLEY NISHIHIRA (425)430-7270 PLEASE INCLUDE THE PROJECT NUMBER WHEN CALLING FOR PROPER FILE IDENTIFICATION uu■uuu 11 uuum■, o_, Ili ufa it III: IH fllLdtllJ - _ ►•"71WIIIiu.■ - ►•m iuv-geom... - IM.uummillI In IRS : r :Ii1�I iin 24t1;r =— =..■ ■ Id a9 II 111E , =: ZOJE I�Iliugiun■. rr • ■■ •ITE 'OM'•== ' ea IF --RICI I—_-- i' .111111 . , , .la .■■ �!11 VIM-II .N. .... ■■■■ \.,kil _ l� II..Imo.� INLi -■t< MTN 1■1i as■..■:RA:■1 'III-o p■E. a ■.■■ M 111 2: Mil a FdAelems: ll 4011 \��r���11�III1III�rI:� z\y---/A „N r, ,Iiipi MI HIGATE LIFT STATION ELIMINATION VICINITY MAP genmalot a CITY _.F RENTON ..LL Planning/Building/Public Works Department 7 e Tanner,Mayor Gregg Zimmerman P.E.,Administrator February 15, 2000 • TO: Property Owners SUBJECT: Higate Lift Station Project No. LUA-99-088,ECF Dear Resident: The Development Planning Section of the City of Renton has determined that the subject application is complete according to submittal requirements and, therefore, is accepted for review. Enclosed is a copy of the Notice of Application (NOA) explaining the proposed project. It is tentatively scheduled for consideration by the Environmental Review Committee on March 7, 2000. Please contact me, at(425)430-7270, if you have any questions. Sincerely, // /2,--; :l Lesley Nishihira Project Manager 1055 South Grady Way-Renton,Washington 98055 C• This paper contains 50%recycled material,20%post consumer ,r_..... ., . '..,.- ..,..-.7,..,4„..:P. ,,r't .''',....t451,7T• r''AX,...., ..",.."- .k.,-;,......-r, s, A t„;;',.'. • . FT,• ..`..',..f'.'... ''.... ;..•,.:, ': "'.` ,14.."'-,....r1F;:".....-,t. 4.-,;.:',.:' . . .34'.P. ,t,,t„,;N,',,,,'.. '..S',',..-A^.;."...,-.4t▪' N1.. '',.." „**, ,,'-1"' .Z..%, ..••*-••••','„t",,'S-,',,Z);. ''.4....t'...1...,i':'•,,,*Li..4{4,4:i,.....,7;f4-,"•.;-.‘r:4,4 *"... 11,:`,1", ,,,; ,..; "r; .,.7. • ..„.• ' ..,••."i", ,V..';',.t",414-A".... • ..3.7,..;-34-••,:i4,4-,r.43,-.''' . .-•• - • .;•'%.-- -,„3,;,,,..:.,*,:i111.. Afalr'..tp .. 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Ct.t.;•-.,,,-,..s• ' ''* ; - *71.---.1,',A-''',..,-*.s,-• k-t•Oli -'4.k, ''', '•• •'.4,4;,:-3. 1.--4,,,,At..4.4„,00,,,, 4'* •"". 4,-,--„1, rL• •.•41 ?"'",..,"i,"•••4•,:•••••.ttiL.., '44.0 • - - ,.,.- . ., .‘• •,- ,... . t.t,_,.-.r, ..‘. .,„,3,,,, CITY OF RENTON MEMORANDUM Date: February 15, 2000 To: John Hobson/Utilities Department From: Lesley Nishihira/Development Planning Subject: Higate Lift Station Project No. LUA-99-088,ECF The Development Planning Section of the City of Renton has received the above-referenced application for environmental review. A presentation of the proposed amendment to the Environmental Review Committee (ERC) is scheduled for March 7, 2000. At that meeting, I will present staff recommendations for the Committee's review and environmental determination. Following the ERC meeting, I will send you copies of the ERC determination along with the timeframes for the public comment and appeal periods for your files. Please provide a charge number for the publication of the environmental determination. acceptmemo CITY OF RENTON PLANNING/BUILDING/PUBLIC WORKS MEMORANDUM DATE: 2/14/2000 TO: Leslie Nishihira FROM: John Hobson SUBJECT: Higate Lift Station Elimination Project: Request for Modification of Wetland Regulations The City's Wastewater Utility is seeking a modification to the City's Wetland regulations under Section 4-3-110 subsection"N"for construction of a new sewer main through a wetland. The City's Higate Sewage Lift Station is currently located on NE 20th St. approximately 400 feet east of the intersection of NE 20th St. and Jones Avenue NE. The lift station is also located within the boundary of a class 2 wetland. This lift station has reached the end of its service life. The Wastewater Utility proposes to remove the existing lift station and replace it with an 8"diameter gravity sewer system. This system will begin within the roadway of NE 20th St.,adjacent to the existing lift station,and proceed approximately 612 feet north through a class 2 wetland and its buffer. The new main will then proceed west approximately 409 feet through the wetland and its buffer to an existing manhole in the roadway of Jones Avenue NE. The project proposes to utilize standard open trenching for installation of the new sewer line. The trench will be backfilled with crushed rock to a point that is 2 feet above the crown of the pipe. Native material will then be replaced to the top of the trench. This method will allow the subsurface waters to continue to flow as they did before the construction and will also allow the native vegetation to resume growth along the trench. As part of the project,only one manhole will be installed outside of the roadways. This manhole will be installed at the angle point in the new sewer and will be located outside of the wetland and buffer. The City's maintenance division reviewed this portion of the design. They indicated that they would be able to service the lines from Jones Ave NE and NE 20th St so this should not present a problem. The design also incorporates the use of 7 CDF trench plugs to prevent the piping of groundwater along the trench line. The Wastewater Utility believes that due to its design concept for the new sewer,the proposed project will not result in any loss of wetland or buffer and will continue to function as is does prior to construction. Final design of the project shall incorporate all SEPA and regulatory agency requirements. This request for modification and any other documentation will be entered as part of the City's SEPA file. A copy of the preliminary plans have been attached for your information. cc: Lys Hornsby \\CENTRAL\SYS2\DEPTS\PBPW\DMSION.S\UTILITIE.S\DOCS\2000-067.doc\jdh NT O N ELOPMEN�',�St�lICE5 DIVISION LAND USE PERMIT MASTER APPLICATION PROPERTY OWNER(S) PROJECT INFORMATION Note: If there is more then one legal owner,please attach an additional :notarized.Master.Application for each owner. PROJECT OR DEVELOPMENT NAME: GN1IS7A J RIGnITT-b • ••ALl�-h4Y / NAME:.PgNFL ER L.AuTzL1 t.E2 GHA7ZL`�IJ .4/6A 7' LI1j ,SMT/o �L//l///11470A.� BORDLe-y uI.IBEDACH-1- PROPERTY/PROJECT ADDRESS(S)/LOCATION: ADDRESS: /BOO 20/0 2l20 /BOD till'20 . T) Z Z� o/c !ZI -JoNCs Ave ,vim �``�? Jot/Es "WE,cam Jo degs AO/,lam atiIa R.O.4J.`s of i2o-r sr Jc 'es A& ,JE CITY: RE.,Arm / ZIP: q�s/_ KING COUNTY ASSESSOR'S ACCOUNT NUMBER(S): /� 6 {� 33 4-3,0 3 2PC 33439 O ,?�3 33-4-390 35&3 TELEPHONE NUMBER: EXISTING LAND USE(S): si1.144 f N't—y APPLICANT (if other than owner) R•o. 1.-I. PROPOSED LAND USES: NAME: COMPANY (if applicable): /'i G>✓ gA/7a,ti EXISTING COMPREHENSIVE PLAN MAP DESIGNATION: �SiD�jui/mac__ S/ti/CaLe- 74-.i447/L-7/ ADDRESS: /0ss 5. Qp0taY {an/ PROPOSED COMPREHENSIVE PLAN MAP DESIGNATION (if applicable): CITY: T / ZIP: 4 O5c EXISTING ZONING: J R /a7Ls Ti LO ME RENTN T PLANNING TELEPHONE NUMBER: -�Q ¢2c5- - 4.3C-72 ! / PROPOSED ZONING (if applicable): FEB O 9 200 CONTACT PERSON �oR/AGE RECEIVED A SITE AREA (SQ. FT. OR ACREAGE): A �—/NAME: k1E 'S k3ov - 14z1D z o� C'77�J7'7 �1t5yeu7- J O 80 , e,r 1-0 4 NJ--oi=— �,c`.G.y COMPANY (if applicable): PROJECT VALUE: a', 5/20 ADDRESS: IS THE SITE LOCATED IN THE AQUIFER PROTECTION AREA? 2- CITY: ZIP: IS THE SITE LOCATED IN ANY OTHER TYPE OF ENVIRONMENTALLY SENSITIVE AREA/?- TELEPHONE NUMBER: ye_5 IderL-•/t"/ar TYPE OF APPLICATION & FEES • Check all application tYp.es.that apply--City staff will determine fees. •_ ANNEXATION $_ SUBDIVISION: _ COMP. PLAN AMENDMENT $ _ REZONE $ _ LOT LINE ADJUSTMENT $ _ SPECIAL PERMIT $ _ SHORT PLAT $ TEMPORARY PERMIT $ TENTATIVE PLAT $ CONDITIONAL USE PERMIT $ _ PRELIMINARY PLAT $ _ SITE PLAN APPROVAL $ _ FINAL PLAT $ _ GRADE & FILL PERMIT _ $ (NO. CU. YDS: ) PLANNED UNIT DEVELOPMENT: $ VARIANCE $ (FROM SECTION: ) _ PRELIMINARY WAIVER $ _ FINAL _ WETLAND PERMIT S ROUTINE VEGETATION MOBILE HOME PARKS: $ MANAGEMENT PERMIT $ _ BINDING SITE PLAN $ SHORELINE REVIEWS: _ SUBSTANTIAL DEVELOPMENT $ CONDITIONAL USE $ VARIANCE $ _ EXEMPTION $No Charce ENVIRONMENTAL REVIEW $ REVISION $ AFFIDAVIT OF OWNERSHIP I, (Print Name)Jo-41./J L3vA.E , declare that I am (please check one) _the owner of the property involved in this application,, the authorized representative to act for the property owner (please attach proof of authorization), and that the foregoing statements and answers herein contained and the information herewith submitted are inAkkOttliffintiue and correct to the best of my knowledge and belief. Vo. FERK/V4��i ���ssionF;.Op.� / / .. i,TTEST: Subscribed and sworn to before me, a Notary Public, in and ✓t ��( Gg�50/-� ,\OTAR j. ";" the State of l(iash residing at • (Name of er/Represent tive) — — 4113"-- cDt-J , on the '4 day of PUBLIC . (Signat e r/Representative) �i� 0,WAS,```�� t J, i rn / �1HHII0 (Signature of Notary Public) (This section to be completed by City Staff.) City File Number: A AAD BSP CAP-S CAP-U CPA CU-A CU-H ECF LLA MHP FPUD FP PP R RVMP SA-A SA-H SHPL-A SHPL-H SP SM SME TP V-A V-B V-H W TOTAL FEES: S TOTAL POSTAGE PROVIDED: S MASTERAP.DOC REVISED 8/97 • NHEN RECORDED RETURN TO RECEIVED Office of the City Clerk , Renton Municipal Buildingtilities i roject File# l+t/k11�/Z 2/.97 200 Mill Avenue South "OCT12 61995 ASEMENT Parcel Tax Account#'s 354-390 32o3 Renton, WA 98055 Grantor(s)Name JsaJ-WAS )--)o►idS �NG KING COUNTY RTSQ SE Z3 S' RECORDER THIS INSTRUMENT, made this / 3 —day of Cczo 8E.( 19 _9 5 � , by and between JA. - Ei Ho.v1E$, IA/C. and ; Iplcase print or type Grantor(s)Names(s)1 and ; and ; and ; hereinafter called "Grantor(s)," and the CITY OF RENTON, a Municipal Corporation of King County, Washington, hereinafter called "Grantee." do That said Grantor(s), for and in consideration of the sum of$ / O.c./r - o4- ,-,1 d-• ,o paid by Grantee, and other valuable consideration, receipt of which is hereby acknowledged, do by these presents, grant, bargain, sell, convey, and warrants unto the said Grantee, its successors and assigns, an easement for public utilities (including water, wastewater, and surface water) with necessary appurtenances over, under, through, across and upon the following described property (the right-of-way) in King County, Washington, more particularly described as follows: poi SCE ATTA.Cti4E L? EXc14IlanT A ,f Together with a temporary construction easement described as: SE £' A-ITQCH E1 EXH 1 BIT 'r A Said temporary construction easement shall remain in force during construction and until such time as the utilities g. and appurtenances have been accepted for the operation and maintenance by the Grantee but not later than December 31, 1997 . r; I Excl } ( n AX NOT REQUIRED _ 1�11 t'iC,�bCOt .ASV Ia101r a Depul DOCUMENT FORM APPROVED BY Utilities Easement Al CITY ATTORNEY sm..24,1992 Sheet l of 21 c:rormc/propmgmt/c:mt/UTILWCON.DOC/bh PROPE61' MGMT. For the purpose of constructing, reconstructing, installing, repairing, replacing, enlarging, operating and maintaining utilities and utility pipelines, including, but not limited to, water, sewer and storm drainage lines, together with the right of ingress and egress thereto without prior institution of any suit or proceedings of law and without incurring any legal obligation or liability therefore. Following the initial construction of its facilities, Grantee may from time to time construct such additional facilities as it may require. This easement is granted subject to the following terms and conditions: 1. The Grantee shall, upon completion of any work within the property covered by the easement, restore the surface of the easement, and any private improvements disturbed or destroyed during execution of the work, as nearly as practicable to the condition they were in immediately before commencement of the work or entry by the Grantee. 2. Grantor shall retain the right to use the surface of the easement as long as such use does not interfere with the easement rights granted to the Grantee. Grantor shall not, however, have the right to: a. Erect or maintain ?ny buildings or structures within the easement; or b. Plant trees, shrubs or vegetation having deep root patterns which may cause damage to or interfere with the utilities to be placed within the easement by the Grantee; or c. Develop, landscape, or beautify the easement area in any way which would unreasonably increase the costs to the Grantee of restoring the easement area and any private improvements therein; or d. Dig, tunnel or perform other forms of construction activities on the property which would disturb the compaction or unearth Grantee's facilities on the right-of-way, or endanger the lateral support facilities; or e. Blast within fifteen (15) feet of the right-of-way. This easement shall run with the land described herein, and shall be binding upon the parties, their heirs, successors in interest and assigns. Grantors covenant that they are the lawful owners of the above properties and that they have a good and lawful right to execute this agreement. Signatures of Gr o s: • p4, and • (81 and • and • and INDIVIDUAL FORM OF ACKNOWLEDGMENT STATE OF WASHINGTON ) ) SS COUNTY OF KING ) I certify that I know or have satisfacto evidence that w/}c.T ,C NAE szwL signed this instrument and acknowledged it to b- !p her/their free and voluntary act for the uses and purposes mentioned in the instrument. Dated /0/9/-e 5— Notary is in and f r the State of Washington residing at , '' •� Notary (print):it 'ctemez. A. 4--eve&A-a My appointment expires: X•I4 V /6, /998 Utilities Easement Sheet 2 of 2 Individual Form c:forms/propmgmUesmUUTILWCON.DOC/bh Exhibit "A" Jan-Wes Homes, Inc. Property Utilities Easement LEGAL DESCRIPTION: A utilities easement over a 15 foot wide strip of land being a portion of Lot 2 of Renton Short Plat #SHPL- 060-87, as recorded under Recording#8805099006, Records of King County, Washington, and described as follows: Beginning at the northwest corner of said Lot 2, said corner also being the northwest corner of Tract 293 of C.D. Hillman's Lake Washington Garden of Eden, Division No. 4, according to the plat thereof as recorded in Volume 11 of Plats,Page 82, Records of King County,Washington; Thence North 88 degrees 09' 49" East along the north line of said Lot 2, a distance of 381.17 feet, to a corner of said Lot 2; Thence South 00 degrees 35' 32" East along an easterly line of said Lot 2 and the southerly extension thereof, a distance of 455.53 feet, to a point on a southerly line of said Lot 2, said line also being the north line of the south 134 feet of Tract 284 of said C.D. Hillman's Lake Washington Garden of Eden, Division No.4; Thence South 88 degrees 16' 14" West along said line, a distance of 15.00 feet; Thence North 00 degrees 35' 32" West,a distance of 440.50 feet; Thence South 88 degrees 09'49" West, a distance of 366.00 feet, more or less, to a point on the west line of said Tract 293; Thence northerly along said west line, a distance of 15.00 feet,to the point of beginning. TOGETHER WITH a temporary construction easement over a 30 foot strip of land being a portion of Lot 2 of Renton Short Plat #SHPL-060-87, as recorded under Recording #8805099006, Records of King County, Washington, and described as follows: Beginning at the northwest corner of said Lot 2, said corner also being the northwest corner of Tract 293 of C.D. Hillman's Lake Washington Garden of Eden, Division No. 4, according to the plat thereof as recorded in Volume 11 of Plats, Page 82,Records of King County,Washington; Thence North 88 degrees 09' 49" East along the north line of said Lot 2, a distance of 381.17 feet, to a corner of said Lot 2; Thence South 00 degrees 35' 32" East along an easterly line of said Lot 2 and the southerly extension thereof, a distance of 455.53 feet, to a point on a southerly line of said Lot 2, said line also being the north line of the south 134 feet of Tract 284 of said C.D. Hillman's Lake Washington Garden of Eden, Division No.4; Thence South 88 degrees 16' 14" West along said line,a distance of 30.00 feet; Thence North 00 degrees 35' 32" West, a distance of 425.50 feet; Thence South 88 degrees 09'49" West, a distance of 351.00 feet, more or less, to a point on the west line of said Tract 293; Thence northerly along said west line, a distance of 30.00, to the point of beginning. All situate in the Southwest quarter of the Northeast quarter and the Northwest quarter of the Southeast quarter,all in Section 5,Township 23 North, Range 5 East,W.M., King County, Washington. pshlcsmt.doc/bh Return Address: City Clerk's Office City of Renton 1055 South Grady Way Renton WA 98055 Title: UTILITIES EASEMENT Property Tax Parcel Number: 334390-3200 Project File#: Street Intersection or Project Name:Higate Lift Station Elimination Reference Number(s)of Documents assigned or released: Additional reference numbers are nn page Grantor(s): Grantee(s): 1. Christian R.Denzler 1. City of Renton,a Municipal Corporation N 2. The Grantor,as named above,for or and in consideration of mutual benefits,hereby grants,bargains,sells and delivers to In the above named Grantee,the following described property: Additional legal is on page of document. N (Abbreviated legal description MUST go here.) V4 LEGAL DESCRIPTION: COA 10 foot permanent utilities easement over the east 10 feet of the following described property: a) The south 134 feet of the west 126 feet of Tract 284,CD Hillman's Lake Washington Garden of Eden,Division Cr) No.4 according to the plat thereof,recorded in Volume 11 of Plats,Page 82,King County,Washington. TOGETHER WITH a temporary construction easement over the west 15 feet of the east 25 feet of the above described property. The temporary construction easement shall expire upon completion and acceptance of the City of Renton's Higate Lift Station Elimination project by the Renton City Council. All situate in the Southeast quarter of Section 5,Township 23 North,Range 5 Fast,W.M.,King County, ; S Washington. . - a• lk : `g .. . . • Cj • • \\TS_SERVER\SYS2\COMMON\DIVISIONS\UTIUTIE.S\DOGS\1999\99-104.DOC\ Page I FORM 03 0000/bh/CA2-21-97 i PROJECT NARRATIVE HIGATE LIFT STATION ELIMINATION The purpose of the project is to eliminate the Higate sewer lift station and replace it with a gravity sewer system. A new 8"gravity sewer line will be installed beginning at an existing sewer line in NE 20th St(at a point approximately 400 feet west of the intersection of NE 20th St and Jones Avenue NE),extended to the north (through existing utility easements across private property)approximately 646 linear feet,thence west approximately 440 linear feet where it will connect into an existing sanitary sewer manhole in Jones Avenue NE. The project will result in an addition of 4 new sewer manholes along the new sewer line. The two privately owned properties that contain the existing utility easements for the proposed sewer line have one single-family residence each. The majority of these properties and approximately 814 linear feet of the new sewer line will be located within a category 2 wetland and its 50-foot buffer. The sewer trench will be backfilled with imported backfill within a zone 2 feet below to 2 feet above the new pipe. The remainder of the backfill will utilize the existing native material,which was excavated for pipe placement,to retain the hydraulic characteristics of the ground water within the wetland area. Impervious earth dams will be placed at points along the trench excavation to prevent the"piping"of ground water along the trench line. Approximately 12—5"to 8"diameter,3— 18"diameter and 1 —30" diameter deciduous trees will be removed during the pipe line excavation. Asphalt restoration will take place within the construction zone in the existing roadways of NE 20th St and Jones Ave NE. The estimated cost of the project is$300,000. DEVELOPMENT PLANNING CITY OF RENTON FEB 092000 RECEIVED CITY OF RENTON DEVELOPMENT SERVICES DIVISION ENVIRONMENTAL CHECKLIST PURPOSE OF CHECKLIST: The State Environmental Policy Act(SEPA), Chapter 43.21C RCW, requires all governmental agencies to consider the environmental impacts of a proposal before making decisions. An Environmental Impact Statement (EIS) must be prepared for all proposals with probable significant adverse impacts on the quality of the environment. The purpose of this checklist is to provide information to help you and the agency identify impacts from your proposal (and to reduce or avoid impacts from the proposal, if it can be done) and to help the agency decide whether an EIS is required. INSTRUCTIONS FOR APPLICANTS: This environmental checklist asks you to describe some basic information about your proposal. Governmental agencies use this checklist to determine whether the environmental impacts of your proposal are significant, requiring preparation of an EIS. Answer the questions briefly, with the most precise information known, or give the best description you can. You must answer each question accurately and carefully, to the best of your knowledge. In most cases, you should be able to answer the questions from your own observations or project plans without the need to hire experts. If you really do not know the answer, or if a question does not apply to your proposal, write "do not know" or"does not apply". Complete answers to the questions now may avoid unnecessary delays later. Some questions ask about governmental regulations, such as zoning, shoreline, and landmark designations. Answer these questions if you can. If you have problems, the governmental agencies can assist you. The checklist questions apply to all parts of your proposal, even if you plan to do them over a period of time or on different parcels of land. Attach any additional information that will help describe your proposal or its environmental effects. The agency to which you submit this checklist may ask you to explain your answers or provide additional information reasonably related to determining if there may be significant adverse impact. DEVELOPMENT PLANNING CITY OF RENTON USE OF CHECKLIST FOR NONPROJECT PROPOSALS: FEB .0 9 2000 Complete this checklist for nonproject proposals, even though questions may be ansREGFAVIED apply." IN ADDITION, complete the SUPPLEMENTAL SHEET FOR NONPROJECT ACTIONS (part D). For nonproject actions (actions involving decisions on policies, plans and programs), the references in the checklist to the words "project," "applicant," and "property or site" should be read as "proposal," "proposer,"and "affected geographic area," respectively. Higate Lift Station Elimination Environmental Checklist A. BACKGROUND 1. Name of proposed project, if applicable: Higate Lift Station Elimination 2. Name of applicant: City of Renton -Wastewater Utility 3. Address and phone number of applicant and contact person: 1055 South Grady Way Contact: John Hobson -(425)430-7279 Renton, WA 98055 4. Date checklist prepared: January 31, 2000 5. Agency requesting checklist: City of Renton 6. Proposed timing or schedule (including phasing, if applicable): Project will be bid in May, 2000 with construction beginning in July, 2000. Completion of construction is estimated for October,2000. 7. Do you have any plans for future additions, expansion, or further activity related to or connected with this proposal? If yes, explain. No. 8. List any environmental information you know about that has been prepared, or will be prepared, directly related to this proposal. A wetland delineation report was prepared by Entranco in December 1996 for this project. A follow-up site review and letter was provided on August 16, 1999 by Entranco to confirm that their 1996 is still valid (this letter is included). A geotechnical report was prepared by Golder and Associates dated January 12, 2000. 9. Do you know whether applications are pending for governmental approvals of other proposals directly affecting the property covered by your proposal? If yes, explain. None 10. List any governmental approvals or permits that will be needed for your proposal, if known. The project may require the following permits: Dept of Fish and Wildlife HPA, Army Corps of Engineers Section 404, Dept of Ecology Water Quality Certification. H:DOCS:96-527:DMC:ps -2- Higate Lift Station Elimination Environmental Checklist 11. Give brief, complete description of your proposal, including the proposed uses and the size of the project and site. The Higate Lift Station Elimination project entails the installation of approximately 1044 linear feet of 8" diameter gravity sanitary sewer pipe and 3 manholes, the removal of the existing sewage lift station, asphalt patching and revegetation of disturbed areas. 12. Location of the proposal. Give sufficient information for a person to understand the precise location of your proposed project, including a street address, if any, and section, township, and range if known. If a proposal would occur over a range of area, provide the range or boundaries of the site(s). Provide a legal description, site plan, vicinity map, and topographic map, if reasonably available. While you should submit any plans required by the agency, you are not required to duplicate maps or detailed plans submitted with any permit applications related to this checklist. The new gravity sewer will extend from a point in NE 20th St that is 5 feet west of the east property line of KC Tax Lot # 334390-3200 (1800 NE 20th St), thence north approximately 612 linear feet through existing utility easements, thence west an offset distance of 7.5 feet south of the north line of KC Tax Lot# 334390-3203 (Lot 2 of REN-SP-60-87) for a distance of approximately 409 linear feet to an existing manhole in Jones Ave NE. The project will be located in the east 1/2 of Section 5, T23N, R5E. B. ENVIRONMENTAL ELEMENTS 1. EARTH a. General description of the site (circle one); flat, rolling, hilly, steep slopes, mountainous, other The site is the existing paved roadway, and flat single family residential lots. One of the residential lots is mostly undeveloped field. b. What is the steepest slope on the site (approximate percent slope?) The steepest slope is approximately 1%. c. What general types of soils are found on the site (for example, clay, sand, gravel, peat, muck)? If you know the classification of agricultural soils, specify them and note any prime farmland. The project site contains Indianola loamy fine sands and Shalcar muck. d. Are there surface indications or history of unstable soils in the immediate vicinity? If so, describe. None. e. Describe the purpose, type, and approximate quantities of any filling or grading proposed. Indicate source of fill. This project will consist of excavation of a trench for purposes of installing an 8 inch sewer main and manholes. The trench will be backfilled with the native soils H:DOCS:96-527:DMC:ps -3- Higate Lift Station Elimination Environmental Checklist where suitable and imported select backfill where not suitable. No change in existing topography will result from this project. f. Could erosion occur as a result of clearing, construction, or use? If so, generally describe. Minor erosion may result during excavation and backfilling activities. Standard erosion control measures will minimize any impact from the minor erosion. g. About what percent of the site will be covered with impervious surfaces after project construction (for example, asphalt or buildings)? There will be no additional pervious area as a result of this project. h. Proposed measures to reduce or control erosion, or other impacts to the earth, if any: The contractor will be required to use standard erosion control measures including but not limited to fabric in catch basins, hay bales, and silt fencing. 2. AIR a. What types of emissions to the air would result from the proposal (i.e., dust, automobile, odors, industrial wood smoke) during construction and when the project is completed? If any, generally describe and give approximate quantities if known. The only emissions that will result from this project will be from construction equipment such as track-hoes, loaders, dump trucks, rollers, etc. b. Are there any off-site sources of emission or odor that may affect your proposal? If so, generally describe. None. c. Proposed measures to reduce or control emissions or other impacts to air, if any: All construction equipment will be required to meet state and federal requirements for emissions. 3. WATER a. Surface Water: 1) Is there any surface water body on or in the immediate vicinity of the site (including year- round and seasonal streams, saltwater, lakes, ponds, wetlands)? If yes, describe type and provide names. If appropriate, state what stream or river it flows into. There is a Category 2 wetland. The City will seek a modification per section "N" of City code 4-3-110 (Wetlands Regulations)to construct within the wetland. 2) Will the project require any work over, in, or adjacent to (within 200 feet) the described waters? If yes, please describe and attach available plans. Yes. Installation of sewer main will be within portions of the wetland and it's buffer. H:DOCS:96-527:DMC:ps -4- Higate Lift Station Elimination Environmental Checklist 3) Estimate the amount of fill and dredge material that would be placed in or removed from surface water or wetlands and indicate the area of the site that would be affected. Indicate the source of fill material. Approximately 638 cubic yards of imported trench backfill material will be used within the wetland and it's buffer. This imported backfill will replace an equal amount of native soil which will be removed from the site during construction. 4) Will the proposal require surface water withdrawals or diversions? Give general description, purpose, and approximate quantities if known. Yes. Temporary diversion of the existing drainage course and trench dewatering will occur during the construction. The original drainage course will be reinstated following installation of the proposed sewer. 5) Does the proposal lie within a 100-year flood plain? If so, note location on the site plan. No. 6) Does the proposal involve any discharges of waste materials to surface waters? If so, describe the type of waste and anticipated volume of discharge. None. b. Ground Water: 1) Will ground water be withdrawn, or will water be discharged to ground water? Give general description, purpose, and approximate quantities if known. The project will require trench dewatering during excavation and pipe installation. Volume will depend on water table at the time of construction. 2) Describe waste material that will be discharged into the ground from septic tanks or other sources, if any (for example: Domestic sewage; industrial, containing the following chemicals...; agricultural; etc.). Describe the general size of the system, the number of such systems, the number of houses to be served (if applicable), or the number of animals or humans the system(s) are expected to serve. None. c. Water Runoff(including storm water): 1) Describe the source of runoff (including storm water) and method of collection and disposal, if any (include quantities, if known). Where will this water flow? Will this water flow into other waters, If so, describe. None. 2) Could waste material enter ground or surface waters? If so, generally describe. No. H:DOCS:96-527:DMC:ps -5- Higate Lift Station Elimination Environmental Checklist d. Proposed measures to reduce or control surface, ground, and runoff water impacts, if any: None. 4. PLANTS a. Check or circle types of vegetation found on the site: _X_ deciduous tree: alder, maple, aspen, other evergreen tree: fir, cedar, pine, other shrubs X grass X__pasture _ crop or grain X wet soil plants: cattail, buttercup, bullrush, skunk cabbage, other water plants: water lily, eel grass, milfoil, other other types of vegetation b. What kind and amount of vegetation will be removed or altered? There will be a removal of approximately 12, 5"-8" diameter alders, 4, 18"-30" diameter alders, and native plants and grasses within the construction zone. The Construction zone will be reseeded with a wetland seed mixture following construction. c. List threatened or endangered species known to be on or near the site. None. d. Proposed landscaping, use of native plants, or other measures to preserve or enhance vegetation on the site, if any: The Construction zone will be reseeded with a wetland seed mixture following construction. 5. ANIMALS a. Circle any birds and animals which have been observed on or near the site or are known to be on or near the site: (see next page) Unknown. The site is undeveloped and would be anticipated to serve as habitat for a variety of species common to the urban periphery. This may include raptors, songbirds, deer, racoons, and rodents among others. Birds: hawk, heron, eagle, songbirds, other Mammals: deer, bear, elk, beaver, other Fish: bass, salmon, trout, herring, shellfish, other b. List any threatened or endangered species known to be on or near the site. None. H:DOCS:96-527:DMC:ps -6- Higate Lift Station Elimination Environmental Checklist C. Is the site part of a migration route? If so, explain No. d. Proposed measures to preserve or enhance wildlife, if any: None required. 6. ENERGY AND NATURAL RESOURCES a. What kinds of energy (electric, natural gas, oil, wood stove, solar)will be used to meet the completed project's energy needs? Describe whether it will be used for heating, manufacturing, etc. No energy will be required to operate the gravity sewer main. b. Would your project affect the potential use of solar energy by adjacent properties? If so, generally describe. No. c. What kinds of energy conservation features are included in the plans of this proposal? List other proposed measures to reduce or control energy impacts, if any: None. 7. ENVIRONMENTAL HEALTH a. Are there any environmental health hazards, including exposure to toxic chemicals, risk of fire and explosion, spill, or hazardous waste, that could occur as a result of this proposal? If so, describe. None. 1) Describe special emergency services that might be required. None. 2) Proposed measures to reduce or control environmental health hazards, if any: None required. b. Noise 1) What types of noise exist in the area which may affect your project (for example: traffic, equipment, operation, other)? None. 2) What types and levels of noise would be created by or associated with the project on a short-term or a long-term basis (for example: traffic, construction, operation, other)? Indicate what hours noise would come from the site. H:DOCS:96-527:DMC:ps -7- Higate Lift Station Elimination Environmental Uhecklist Short term noise impacts will be only those from construction equipment such as track-hoes, loaders, generators,trucks, etc. H:DOCS:96-527:DMC:ps -8- Higate Lift Station Elimination Environmental Checklist 3) Proposed measures to reduce or control noise impacts, if any: Contractor will be required to meet all federal, state, and local noise level requirements. 8. LAND AND SHORELINE USE a. What is the current use of the site and adjacent properties? The existing site is two single family residential lots and small portions of roadway. b. Has the site been used for agriculture? If so, describe. No. c. Describe any structures on the site. None. d. Will any structures be demolished? If so, what? No. e. What is the current zoning classification of the site? Residential 8 DU/AC f. What is the current comprehensive plan designation of the site? Residential single family g. If applicable, what is the current shoreline master program designation of the site? Not applicable. h. Has any part of the site been classified as an "environmentally sensitive" area? If so, specify. The project site contains a wetland Approximately how many people would reside or work in the completed project? None. j. Approximately how many people would the completed project displace? None. k. Proposed measures to avoid or reduce displacement impacts, if any: None required. H:DOCS:96-527:DMC:ps -9- Higate Lift Station Elimination Environmental Uhecklist I. Proposed measures to ensure the proposal is compatible with existing and projected land uses and plans, if any: None required. 9. HOUSING a. Approximately how many units would be provided, if any? Indicate whether high, middle, or low-income housing. None. b. Approximately how many units, if any, would be eliminated? Indicate whether high, middle, or low-income housing. None. c. Proposed measures to reduce or control housing impacts, if any: None required. 10. AESTHETICS a. What is the tallest height of any proposed structure(s), not including antennas; what is the principal exterior building material(s) proposed. None. b. What views in the immediate vicinity would be altered or obstructed? None. c. Proposed measures to reduce or control aesthetic impacts, if any: None required. 11. LIGHT AND GLARE a. What type of light or glare will the proposal produce? What time of day would it mainly occur? None. b. Could light or glare from the finished project be a safety hazard or interfere with views? No. c. What existing off-site sources of light or glare may affect your proposal? None. d. Proposed measures to reduce or control light and glare impacts, if any: None required. H:DOCS:96-527:DMC:ps -10- Higate Lift Station Elimination Environmental Checklist 12. RECREATION a. What designated and informal recreational opportunities are in the immediate vicinity? None. b. Would the proposed project displace any existing recreational uses? If so, describe. No. c. Proposed measures to reduce or control impacts on recreation, including recreation opportunities to be provided by the project or applicant, if any: None required. 13. HISTORIC AND CULTURAL PRESERVATION a. Are there any places or objects listed on, or proposed for, national state, or local preservation registers known to be on or next to the site? If so, generally describe. None. b. Generally describe any landmarks or evidence of historic, archaeological, scientific, or cultural importance known to be on or next to the site. None. c. Proposed measures to reduce or control impacts, if any: None required. 14. TRANSPORTATION a. Identify public streets and highways serving the site, and describe proposed access to the existing street system. Show on site plans, if any. The project will be constructed within a small portion of NE 20' St and Jones Ave NE. b. Is site currently served by public transit? If not, what is the approximate distance to the nearest transit stop? No. Approximately 1000 feet east at the intersection of Aberdeen Ave NE and NE 20t'St. c. How many parking spaces would the completed project have? How many would the project eliminate? None. H:DOCS:96-527:DMC:ps -1 1- Higate Lift Station Elimination Environme,,,.,,,hecklist d. Will the proposal require any new roads or streets, or improvements to existing roads or streets, not including driveways? If so, generally describe (indicate whether public or private? Asphalt patching of NE 20th St. and Jones Ave NE will be required where the new pipeline connects into the existing manholes. e. Will the project use (or occur in the immediate vicinity of) water, rail, or air transportation? If so, generally describe. No. f. How many vehicular trips per day would be generated by the completed project? If known, indicate when peak volumes would occur. None. g. Proposed measures to reduce or control transportation impacts, if any: None. 15. PUBLIC SERVICES a. Would the project result in an increased need for public services (for example: fire protection, police protection, health care, schools, other)? If so, generally describe. None. b. Proposed measures to reduce or control direct impacts on public services, if any. None required. 16. UTILITIES a. Circle utilities currently available at the site: electricity, natural gas, water, refuse service,telephone,sanitary sewer,septic system, other: cable b. Describe the utilities that are proposed for the project, the utility providing the service, and the general construction activities on the site or in the immediate vicinity which might be needed. The project consists of the construction of an 8 inch sanitary sewer main that will be owned and operated by the City of Renton. H:DOCS:96-527:DMC:ps -12- Higate Lift Station Elimination Environmental t.;hecklist C. SIGNATURE I, the undersigned, state that to the best of my knowledge the above information is true and complete. It is understood that the lead agency may withdraw any declaration of non-significance that it might issue in reliance upon this checklist should there be any willful misrepresentation or willful lack of full disclosure on my part. Proponent: Name Printed: ohn D. Hobson Date: _January 31, 2000 H:DOCS:96-527:DMC:ps -13- DEVELOPMENT SERVICES DIVISION WAIVER OF SUBMITTAL REQUIREMENTS FOR LAND USE • APPLICATIONS • LAND USE PERMIT SUBMITTAL WAIVED MODIFIED COMMENTS REQUIREMENTS Calculations, Survey, Drainage Control 1=1an2 Drainage Report 2 3 Elevations, ArchitecturalaANo4 Elevations, Grading 2 Existing Covenants (Recorded Copy)+ Existing Easements (Recorded Copy) 4 Flood Plain Map, if applicable, Floor Plans 3AN04 Geotechnical'Reportz.ANos ... Grading Plan, Conceptual 2 Grading'Plan, Detailed 2 King County Assessor's Map Indicating Site 4 Landscaping.Plan, Conceptual4 Legal Description 4 List of Surrounding'Property Owners4 Mailing Labels for Property Owners 4 Map of Existing Site Conditions 4 Master Application Form 4 Monument Cards(one per'monument) , Parking, Lot Coverage & Landscaping Analysis 4 Plan Reductions (PMTs) 4 Postage 4 Public Works Approval Letter 2 Title Report or Plat.Certificate 4 Topography Map (5' contours)3 Traffic Study 2 � Tree Cutting/Vegetation Clearing Plan 4 Utilities Plan, Generalized 2 6.01 Wetlands Delineation Map 4 ( I Wetlands Planting Plan Wetlands Study This requirement may be waived by: 1 Property Services Section PROJECT NAME:tYOF Rc-blvV NthtC L\FT *a 2 Public Works Plan Review Section E M� 1Tla- 3 Building Section DATE: %IOW tactic{ 2. Development Planning Section © E N T R A N C O August 16, 1999 John Hobson AUG ]. 71999 City of Renton Wastewater Utility Division CITY OF RENTr,N 200 Mill Avenue South Renton, Washington 98055 10900 Re: Higate Sewage Lift Station Wetland Delineation Entranco Project No. 99133-60 NE 8TH STREET Dear Mr. Hobson: SUITE 300 BELLEVUE This letter summarizes my review of a wetland delineation documented in the Higate Sewage Lift Station Elimination, Wetland Delineation Report prepared in December WASHINGTON 1996 by Entranco (project no. 96038). The field analysis was completed in August 98004.4405 1996 and one 5- to 8-acre wetland was delineated. Because the wetland delineation was completed in late summer, wetland hydrology was assumed in some instances. Portions of the wetland in the project corridor were flagged; portions outside of the TELEPHONE project corridor were visually estimated. 425 454 5600 On July 21, 1999, I reviewed the wetland delineation report and examined the project corridor. No flags from the 1996 delineation were observed. The wetland boundaries that I observed corresponded to the wetland boundaries mapped in the delineation TOLL FREE report. Because I completed the review in the summer, I also had to assume wetland hydrology in some instances. 800 454 5601 I also agree with the classification of the wetland as a City of Renton, Category 2 wetland, because the wetland is a headwater wetland. FAX 425 454 0220 If you have any questions concerning this project, please feel free to call me. Sincerely, KAFNT PUNNING INTERNET ENT ANCO, INC. DEv CLOY __.RENTOm www.entranco.com FEB p 9 2000 en rgent RECEIVED Senior Wetland Ecologist KWS:jc ARIZONA CALIFORNIA IDAHO OREGON UTAH WASHINGTON a 2 Wetland Delineation Report Higate Sewage Lift Station Elimination Renton, Washington Prepared for: AGRA Earth & Environmental and City of Renton j December 1996 41113110 E N T R A N C O Wetland Delineation Report HIGATE SEWAGE LIFT STATION ELIMINATION Renton, Washington Prepared for AGRA Earth & Environmental 11335 NE 122nd Way, Suite 100 Kirkland, Washington 98034-6918 (206) 820-4669 and City of Renton 200 Mill Avenue South Renton, Washington 98055 (206) 277-6179 Prepared by ENTRANCO 10900 NE 8th Street, Suite 300 Bellevue, Washington 98004 (206) 454-5600 December 1996 • CONTENTS Page INTRODUCTION 1 BACKGROUND 1 FIELD INVESTIGATION METHODOLOGY 1 FIELD INVESTIGATION 8 Field Data Results 10 Wetland Delineation Results 14 POTENTIAL WETLAND IMPACTS During Construction 14 During Operation 15 CONCEPTUAL MITIGATION 15 REFERENCES Published Documents 16 APPENDIX A - Wetland Map from Original Alignment B - Wetland Map from Surrounding Property C - Growing Season Table D - Completed Data Forms E - Earthen Trench Plug 96038I Report I Wetlands(12i18/96)/is FIGURES Page 1. Project Vicinity 2 2. Proposed New Sewer Line Corridor 3 3. NWl Wetlands in the Project Area 4 4 City Inventory Wetlands in the Project Area 5 5. Wetland Delineation Map 9 TABLES Page 1. Plant Status and Chance of Growing In a Wetland 6 2. Soils in the Project Area 7 96038/Report/Wetlands(12/18/96)/IC II INTRODUCTION This wetlands investigation is for the proposed Higate Sewer Lift Station Elimination project, which is located in Section 5, Township 23 North, Range 5 East, W.M., and in the City of Renton (figure 1). The proposed new buried sewer line would be located in the northeastern quadrant of the intersection of Jones Avenue NE and NE 20th Street along a 15-foot-wide utility easement (figure 2). The investigation was performed to identify and to delineate the jurisdictional boundary of wetlands within 65 feet of the utility easement. BACKGROUND Two previous wetland studies have been conducted in the project vicinity. These studies were reviewed prior to conducting the current field investigation. The first study was prepared for the original alignment for proposed new sewer line (the original alignment was approximately 120 feet west of the current alignment along NE 20th Street). The results from this investigation indicated wetlands were along only the immediate creek channel and around the existing excavated pond (Appendix A, Phelps 1993). The second investigation was conducted for a private land owner who owns much of the property the proposed new sewer line will cross. The results from this investigation indicated that the wetlands extend across much of the creek valley (Appendix B, David Evans & Associates 1994). Maps from both the U.S. Fish and Wildlife Service National Wetland Inventory (USFWS NWI) and the City of Renton also were examined to see if these government agencies had identified any wetlands as occurring in the project vicinity. The NWI map (USFWS 1988) indicates a seasonally flooded, palustrine (freshwater) scrub-shrub wetland (PSSC, Cowardin et al 1979) in the project area (figure 3). This site corresponds to the blueberry farm immediately south of NE 20th Street and the existing sewage lift station (which is to be eliminated). The City of Renton's wetland map (Renton 1992) indicates a wetland in the same area, but shows the wetland extending north of NE 20th Street (figure 4). FIELD INVESTIGATION METHODOLOGY The wetland investigation was conducted using the "Routine On-site Determination Method"described in the Corps of Engineers Wetlands Delineation Manual (Environmental Laboratory 1987), as modified (Corps 1991 and 1992). For jurisdictional purposes, wetlands are defined by the U.S. Army Corps of Engineers (Corps) and Environmental Protection Agency (EPA) (Federal Register 1982 and 1980) as: 9603E/Report/Wetlands(12/18/96)//C 1 '. -' \ JW.''- . ' ' 'P: -:. 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INC.a = 8 Higate Sewage Lift Station - Wetland Delineation Report © ENTRANCO Figure 4 City Inventory Wetlands in the Project Area "Those areas that are inundated or saturated by surface or ground water at a frequency and duration sufficient to support, and that under normal circumstances do support, a prevalence of vegetation typically adapted for life in saturated soil conditions. Wetlands generally include swamps, marshes, bogs, and similar areas." The presence of the three essential wetland characteristics (i.e., wetland vegetation, soils, and hydrology) were examined by looking for positive indicators of each characteristic. Examination for wetland (hydrophytic) vegetation is done within different plant communities (i.e., communities that are composed of significantly different species of plants). Each plant community along the suspected wetland/non-wetland boundary is identified and described and a data point is selected in each different plant community. Plant species are identified around that data point for each different stratum (e.g., tree, sapling, shrub, and herb). The sampling area around the data point is a 30-foot radius for the tree stratum and a 5-foot radius for the sapling, shrub, and herb strata. Through visual estimating, the plants are given a percentage of coverage in each stratum sampling area. The dominant plants in each stratum are determined by selecting plants which have a coverage of 20 percent for each stratum. These plants are included on the list of dominant species. Plant species were identified using the Flora of the Pacific Northwest(Hitchcock and Cronquist 1973). Plants were further identified as to the estimated probability of their chance of occurring in wetland and non-wetland environments, based on the National List of Plant Species That Occur in Wetlands(Reed 1988a, 1988b, and 1993 and Corps 1994) as shown in table 1. Table 1 Plant Status and Chance of Growing in a Wetland Indicator Categories Symbol Estimated Probability Obligate Wetland OBL >99% Facultative Wetland FACW 67%-99% Facultative FAC 34%-66% Facultative Upland FACU 1%-33% Obligate Upland UPL <1% The dominant species and their indicator category for all strata are combined together to determine if the identified dominant vegetation meets the criteria that wetland plants 96038 I Report/Wetlands(12/18/96)/jo 6 comprise most of the plant community. In general, the criteria to meet the wetland vegetation requirements occurs when the dominant plants that have an OBL, FACW, and/or FAC indicator (see table 1) account for more than 50 percent of the total list of dominant species. When this "greater than 50 percent"threshold occurs, the data point is said to have a positive presence of wetland vegetation. In addition to the percent coverage method, there are other indicators for identifying wetland vegetation. If the plants are observed to be growing under saturated or inundated conditions during the growing season, regardless of the indicator status, the plants should be considered as acting like wetland plants. Morphological, physiological, and reproductive adaptation, and evidence from technical literature also are used to determine if the plant is acting as wetland vegetation. If there is strong evidence of these other indicators, the plant community should be said to have a positive presence of wetland vegetation. Examination for wetland (hydric) soils starts by digging a pit at the data point and assessing the soil characteristics. Indicators for hydric soils include: (1) organic soils; (2) histic epipedons; (3) sulfidic materials; (4) aquic or peraquic moisture regimes; (5) direct observation of reducing soil conditions; (6) gleyed, low chroma, and low chroma/ mottled mineral soils; (7) soils on the local or national hydric soils list (note: care must be taken here so as not to include remnant hydric soils); (8) iron and manganese concretions; and (9) coarse textured or sandy hydric soils that have high organic matter content in the surface margin, dark vertical streaks of organic matter in subsurface horizons, or an organic pan (i.e., wet spodosol, an organic layer "floating" underground at the water table). Mineral soils were examined using the Munsell Soil Color Charts(Kollmorgen 1988) and the soil characteristics of the project area were reviewed with the Soil Survey King County, Washington and King County Area Hydric Soils List(USDA Soil Conservation Service 1973 and 1989) for hydric soil indicators (table 2 and Appendix B). Soils with a hydric inclusion are soils that, for mapping purposes and constraints, can have small patches of wetland soils (hydric soils) included in the soil area. Table 2 Soils in the Project Area Soil Hydric Sym. Soil Name Slope Hydric Inclusion Inc Indianola loamy fine sand 4-15% no no Sm Shalcar muck 0-1% yes n/a 96038/Report/Wetlands(12/18/96)/p 7 Examination for wetland hydrology starts by visually scanning across the site and in the soil pit, to check for indicators of wetland hydrology. These primary field indicators, in descending order of reliability, include: (1) visual observation of inundation; (2) visual observation of soil saturation in the upper 12 inches; (3) water marks; (4) drift lines; (5) water-borne sediment deposits; and (6) wetland drainage patterns. Secondary field indicators include evidence of: (1) oxidized root channels (rhizospheres) associated with living roots and rhizomes in the upper 12 inches; (2) water stained leaves; (3) local soil survey data; and (4) FAC-neutral test (note: Corps approval is required to use this test). The manual further defines the jurisdictional timing and duration of inundation and soil saturation to meet the hydrology criteria. Non-tidal areas that have a duration of inundation and/or soil saturation greater or equal to 5 percent of the growing season may have wetland hydrology. Sites with 12.5 percent or greater duration of the growing season are considered to have a positive presence for wetland hydrology. The growing season is defined as surface temperatures greater than 28 degrees Fahrenheit, for at least 50 percent of the year. The growing season for the site was determined as being 253 days long based on the USDA Soil Conservation Service (now the Natural Resources Conservation Service) Soil Survey for King County Area, Washington (USDA SCS 1973) (Appendix C). The 5 and 12.5 percentages translate into roughly 13 and 32 days, respectively. FIELD INVESTIGATION The field investigation was conducted on August 7 and 8, 1996. The weather during the field investigation was sunny and hot. Since the field examination occurred during the driest time of the year, professional judgment was used in some cases, to determine the presence of wetland hydrology. Nine data points were located on the site to look for positive indicators of the three essential wetland characteristics: wetland (hydrophytic) vegetation, wetland (hydric) soils, and wetland hydrology. Data gathered was used to determine the boundary of the project wetland. These data points correspond to the soil pits (SP) and were numbered SP1 through SP9 on pink survey flagging. Cross ditches over the utility easement were also labeled and flagged with pink survey tape. The data points are shown on figure 5, the completed data forms are attached as Appendix D. Soils colors were taken from wet samples unless noted otherwise. 96038/Report/Wetlands(12/18/96)/lc 8 . aaIar so' vdEILAV / 80 40 0 80 _ __ 160 / Alii ........--)1 Sewer Construction Easement ., r, ,i„� l # ar a p M4 4 ' M . eql�-�. .� , illii X4o o_k I hail e(Th tgpQ r_ S - ---5•----- .+w s. • 1 • ..,,NE 2QTH I ST y m J. 1 lid i - -i......... 3 11+.,,__. ajws--l 1 i kt @I 1I i-li I dS -- j Y 1 .' iii111_ [ 1.---,/ ! IA WETLAND _ 1 -f I ; t I _i ,4 1 I C,�1 �a 1 b I . I Legend La :� } a SP-1 Soil Pit i'" ^^i—i Wetland Flag - =_—�- i --w— Delineated Wetland Boundar 8 • 1, - �- -- f w _ , Approximate Wetland Bound, \S L'tM I I iI 50' Buffer Zone 3ri, :s ¢i 3 a ¢e O W 2 O Figu © EN T R A N C O Wetland Delineation M Field Data Results Data Point 1. The data point is located in roughly the mid-point along the north/south leg of the new sewer line corridor, and in a scrub-shrub plant community dominated by hardhack (Spiraea douglasii), lady fern (Athyrium filix-femina), giant horsetail (Equisetum telmateia), and Himalayan blackberry (Rubus procera). These plants together indicate the presence of hydrophytic vegetation. A soil pit (SP1) was dug to a depth of 12 inches to look for positive indicators of hydric soils and wetland hydrology. Although the soil was organic (a hydric soil indicator), the soil color was still examined. The soil was determined to be a 10YR 2/1 color throughout the core. With the organic soil, hydric soils were considered to be present. The soil pit was saturated to the surface and free standing water was 6 inches below the surface. The wetland hydrology characteristic was considered to be present. This data point was determined to be a wetland since all three essential wetland requirements were met. Data Point 2. The data point is located south of Data Point 1 up a small knoll, and is in a scrub-shrub plant community dominated by Himalayan blackberry, giant horsetail, and hedge bindweed (Convolvulus sepium). Although not listed as a wetland plant, the blackberry is known to be a vigorous grower in seasonally flooded wetlands. In this case, the blackberry was considered to be acting as a wetland plant, based on the shallow water table. The positive presence of hydrophytic vegetation was assumed. A soil pit (SP2) was dug to a depth of 15 inches to look for positive indicators of hydric soils and wetland hydrology. The soil was organic (a hydric soil indicator) in the upper 6 inches and mineral below this. The soil color was examined in the sandy mineral soil and was determined to be a 10YR 3/2 color. A strong sulfidic odor was also present in the soil. With the 6-inch organic soil layer(histic epipedon) over the saturated sandy soil, hydric soils were considered to be present. The soil pit was saturated at 12 inches and free standing water occurred 15 inches below the surface. The typical groundwater level was assumed to be much higher at the beginning of the growing season (March). The wetland hydrology characteristic was considered to be present. This data point was determined to be a wetland since all three essential wetland requirements were met. Data Point 3. The data point is located west of Data Point 1, up on a slight mound. The data point is in a plant community dominated by red alder (Alnus rubra), giant horsetail, and Himalayan blackberry. These plants together indicate the presence of hydrophytic vegetation. 96038/Report/Wetlands(12/18/96)/tc 1 0 A soil pit (SP3) was dug to a depth of 18 inches to look for positive indicators of hydric soils and wetland hydrology. The soil has an organic layer (a hydric soil indicator) in the top 12 inches and a mineral soil below. The silty textured mineral soil was determined to be a 10YR 3/1, with mottles of a 10YR 4/4 color. With the organic soil layer (histic epipedon) over the low chroma, silty mineral soil, hydric soils were considered to be present. No water or saturation was observed in the soil pit. But due to the proximity and shallow elevation change from the surrounding area determined to be a wetland, the soil pit would be expected to be saturated within 12 inches of the surface, at the beginning of the growing season, for a sufficient duration to meet the jurisdictional hydrology requirements. The wetland hydrology characteristic was assumed to be present. This data point was determined to be a wetland since all three essential wetland requirements were met. Data Point 4. The data point is in a disturbed plant community (i.e., front yard of a house and maintained as a lawn) just north of NE 20th Street, and is dominated by creeping buttercup (Ranunculus repens), velvet grass (Holcus lanatus), horsetail (Equisetum sp., likely telmateia), and unidentifiable grasses (due to the mowing). These plants together indicate the presence of hydrophytic vegetation. A soil pit (SP4) was dug to a depth of 12 inches to look for positive indicators of hydric soils and wetland hydrology. Although the soil was organic throughout the core (a hydric soil indicator), the soil color was still examined. The soil was determined to be a 10YR 2/1 color in the upper 12 inches and 7.5YR 2/0 below that point in the core. With the organic soil, hydric soils were considered to be present. The soil pit was saturated to 4 inches from the surface and free standing water occurred 6 inches below the surface. The wetland hydrology characteristic was considered to be present. This data point was determined to be a wetland since all three essential wetland requirements were met. Data Point 5. The data point is located north of Data Point 1, next to a fallen and grown over barn. The data point is in a scrub-shrub plant community dominated by reed canarygrass (Phalaris arundinacea), giant horsetail, and Himalayan blackberry. These plants together indicate the presence of hydrophytic vegetation. A soil pit (SP5) was dug to a depth of 18 inches to look for positive indicators of hydric soils and wetland hydrology. Although the upper part of the soil was organic (a hydric soil indicator), the soil color was still examined for the mineral soil below. The soil was determined to be a 10YR 3/2 color (dry) in the sandy/mucky soil from 0 to 7 inches. From 7 to 14 inches, the sandy loamy soil was determined to be a 10YR 5/2 color with 96038/Report/Wetlands(12/18/96)/pc 1 abundant mottles of both 7.5YR 4/4 and 7.5YR 5/6 colors. Below 14 inches, the soil was a 10YR 5/2 color with mainly 10YR 5/6 colored mottles. With the low chroma, mottled mineral soil, hydric soils were considered to be present. The soil pit was saturated to a depth of 14 inches below the surface, however, free standing water was not observed in the soil pit. Based on the depth of saturation (i.e., close to 12 inches below the surface) and time of year during the field investigation, the wetland hydrology characteristic was assumed to be present. This data point was determined to be a wetland since all three essential wetland requirements were met. Data Point 6. The data point is just upslope to the north of Data Point 5 and is in a scrub-shrub plant community dominated by Himalayan blackberry, which by itself, does not indicate the presence of hydrophytic vegetation. A soil pit (SP6) was dug to a depth of 24 inches to look for positive indicators of hydric soils and wetland hydrology. The sandy mineral soil was determined to be a 10YR 3/2 color, with no mottles, from 0 to 10 inches deep, 10YR 4/4 from 10 to 24 inches deep, and 10YR 5/4, with some slight soil discoloration noticeable. With no hydric indicators observed in the mineral soils, hydric soils were not considered to be present. No indicators of wetland hydrology was observed in the soil pit or surrounding area. The wetland hydrology characteristic was not considered to be present. This data point was determined not to be a wetland since none of the essential wetland requirements were met. Data Point 7. The data point is located on the northern portion of the project, along the east/west leg of the new sewer line corridor in a scrub-shrub plant community dominated by Himalayan blackberry, giant horsetail, hardhack, and red alder. These plants together indicate the presence of hydrophytic vegetation. A soil pit (SP7) was dug to a depth of 24 inches to look for positive indicators of hydric soils and wetland hydrology. The sandy mineral soil was determined to be a 10YR 3/1 (dry) color to 10 inches deep, and a 10YR 6/2 (dry) color, with abundant 7.5YR 4/6 mottles from 10 to 24 inches deep. With the low chroma, mottled mineral soil, hydric soils were considered to be present. No inundation or saturation was observed in the soil pit during the field investigation. However, based on the proximity and relative location in the topography to the creek, the site would likely have sufficient water during the beginning of the growing season to meet the hydrology criteria. With this in mind, the wetland hydrology characteristic was assumed to be present. This data point was determined to be a wetland since all three essential wetland requirements were met. 96038/Report/Wetlands(12/18/96)/p 12 Data Point 8. The data point is located upslope from Data Point 7, and is in a scrub- shrub plant community dominated by Himalayan blackberry, salmonberry (Rubus spectabilis), and red alder. These plants together indicate the presence of hydrophytic vegetation. A soil pit (SP8) was dug to a depth of 24 inches to look for positive indicators of hydric soils and wetland hydrology. All soil colors were determined using dry samples. The sandy mineral soil was determined to be a 10YR 2/1 color from 0 to 9 inches deep, 10YR 6/2.5, with very slight 10YR 5/6 mottles from 9 to 18 inches deep, and 10YR 6/2, with strong 10YR 4/6 mottles from 18 to 24 inches deep. Although slight, the mottling in the low chroma mineral soil appear sufficient to meet the wetland soils criteria. Hydric soils were considered to be present. No indicators of wetland hydrology were observed in the soil pit or surrounding area. Based on the proximity and higher elevation relative to the creek, the site would likely not have sufficient water during the beginning of the growing season to meet the hydrology criteria. The wetland hydrology characteristic was not considered to be present. This data point was determined not to be a wetland since only two of the essential wetland requirements were met. Data Point 9. The data point is located in the field (likely old pasture) north of the new sewer line corridor and west of the creek. The data point is in an emergent plant community dominated by reed canarygrass, giant horsetail, soft rush (Juncus effusus), creeping buttercup, and quackgrass (Agropyron repens). These plants together indicate the presence of hydrophytic vegetation. A soil pit (SP9) was dug to a depth of 18 inches to look for positive indicators of hydric soils and wetland hydrology. All soil colors were determined using dry samples. The sandy mineral soil was determined to be a 10YR 3/2 color, with no mottles, from 0 to 9 inches deep, and a 10YR 5/2 color, with both 10YR 5/6 and 7.5YR 4/4 colored mottles from 9 though 18 inches deep. With the mottled, low chroma mineral soil, hydric soils were considered to be present. No inundation or saturation was observed in the soil pit during the field investigation. However, based on the proximity and position in the landscape relative to the creek, the site would likely have sufficient water during the beginning of the growing season to meet the hydrology criteria. With this in mind, the wetland hydrology characteristic was assumed to be present. This data point was determined to be a wetland since all three essential wetland requirements were met. 96038/Report/Wetlands(12/18/96)/F 13 Wetland Delineation Results The wetland was flagged with blue survey tape and marked as assessment area AA-1 through AA-12 with in the project corridor. The wetland boundary outside of the corridor was visually estimated. The wetland is directly connected to the creek corridor and is fed by surrounding seeps in several locations. The entire wetland is estimated to be roughly 5-8 acres in size. Though historically used as a pasture, and now overgrown with blackberry and red alder, the wetland would meet the criteria as a Category 2, High Quality Wetlands, since the site is a headwater wetland (Renton 1992b). Category 2 wetlands require a standard buffer of 50 feet. The disturbed portion of the wetland (i.e., residence next to NE 20th Street), would, by itself, meet the criteria as a Category 3, Lower Quality Wetlands. This is based on the presence of fill for the house and garages. Category 3 wetlands require a standard buffer of 25 feet. However, since this area is connected to the main portion of the wetland, this disturbed area also would be considered a Category 2 wetland with a 50- foot buffer. The creek would have a buffer of 25 feet. Any activity in the wetlands may require permits from federal, state and city resource agencies. These permits may include: Permit/Approval/Review Resource Agency Section 404, Nationwide Permit U.S. Army Corps of Engineers Water Quality Modification Washington State Department of Ecology Hydraulic Project Approval (HPA) Washington State Department of Fish and Wildlife SEPA Review City of Renton Wetland Permit City of Renton POTENTIAL WETLAND IMPACTS Based on the most current plan set (11/1/95), the impacts to the wetland were estimated for activities during construction and during operation. Cumulative and secondary impacts are not addressed in this report, since the project details are not completed. Cumulative and secondary impacts, however, should be considered and included as part of the wetland mitigation plan preparation. During Construction Impacts during construction are those which may temporarily affect the wetland's vegetation, soils, and hydrology. The project utility corridor is 15 feet wide and the 96038/Report/Wetlands(12118/96)/lc 14 construction easement corridor is approximately 15 feet wide. Construction for the new sewer line would likely affect all the wetlands in these corridors. The 30-foot-wide construction corridor would impact roughly 13,350 square feet of wetlands. The construction also would impact 6,600 square feet of wetland buffer area. Material storage is expected to occur outside of the wetlands. During Operation Impacts during operation are those which may permanently affect the wetland's vegetation, soils, and hydrology. No permanent impacts are anticipated for the proposed project. CONCEPTUAL MITIGATION As with impacts, mitigation can be for temporary impacts (construction) and permanent impacts (operation). Typically, temporary impacts to wetlands can be mitigated by restoring the site after construction. However, mitigation criteria set at the beginning of construction can minimize the impacts and aid in the wetlands recovery. Mitigation for temporary impacts, in no particular order, may include: • narrow the construction corridor to minimize the amounts of wetlands disturbed • protect large trees in the corridor and wetlands out of the corridor, with clearing limit fencing • cut the vegetation to leave short stems and roots for rapid regrowth • use log mats or geotech fabric and hogfuel to limit soil disruption • stockpile surplus soils away from wetlands • use earthen trench plugs periodically to avoid "piping" along new sewer line (refer to a typical detail in Appendix E). • maintain subsurface cross water flow, by using either a drainage blanket or pipes • discharge water pumped out of the construction trench to points outside of wetlands, possibly using the current sewer system, or do not drain the trench and "work in the wet" • construct only during dry weather and within the HPA fisheries window • separate and bypass flowing water in the ditches and creek from the construction trench 960381 Report/Wetlands(12/18.4,6)/jc 15 • reuse existing hydric soils and reshape the landscape to pre-construction conditions • revegetate the disturbed wetland and buffer with native plant species. • maintain and monitor the revegetated areas to assure adequate establishment of the native vegetation Mitigation for permanent impacts may need to follow the criteria in the Wetland Management Ordinance (Renton 1992b) to compensate for any permanent loss of wetlands. Mitigation can be creation of new wetlands from upland areas or restoration of degraded wetland areas. In case there were to be impacts to the wetlands, the Category 2, scrub-shrub wetlands permanently affected would need to be compensated at a 2:1 ratio. Wetland buffers permanently lost also would require mitigation. If needed, a potential mitigation site could be the reed canarygrass dominated wetland plant community along the new sewer line corridor. This site is located just north of the lot along NE 20th Street. Mitigation at this location could be in the form of a wetlands restoration effort. If permanent impacts were to occur, a mitigation report and plan would need to be created when specific impacts are determined. A mitigation report would contain the environmental goals and objectives, performance standards, wetland construction plans, monitoring plans, and a contingency plan for the mitigation effort. However, with no permanent impacts anticipated for the project, no creation mitigation for replacement wetlands is expected. REFERENCES Published Documents Adamus, Paul R., Ellis J. Clairain, R. Daniel Smith and Richard E. Young 1987 Wetland Evaluation Technique (WET); Volume II: Methodology, Operational Draft Technical Report Y-87- , U.S. Army Corps of Engineers Waterways Experiment Station, Vicksburg, MS. Cowardin, Lewis M., Virginia Carter, Francis C. Golet and Edward T. LaRoe 1979 Classification of Wetlands and Deepwater Habitats of the United States. Prepared for the Office of Biological Services, Fish and Wildlife Services, U.S. Department of Interior, Washington DC, FWS/OBS-79/31. David Evans and Associates 1994 Wetland Delineation Letter. Prepared for private landowner. 96038/Report/Wetlands(12/18/96)I p 16 Environmental Laboratory 1987 Corps of Engineers Wetland Delineation Manual (1987 Manual). Technical Report Y-87-1, U.S. Army Engineers Waterways Experiment Station, Vicksburg, Mississippi. Federal Register 1991 33 CFR Part 330: Nationwide Permit Program Regulations and Issue, Reissue, and Modify Nationwide Permits; Final Rule. Part III Department of Defense, Corps of Engineers, Department of the Army, Vol. 56, No. 226, US Government Printing Office, Washington, D.C. November 22. 1982 Title 33: Navigation and Navigable Waters; Chapter II, Regulatory Programs Corps of Engineers., Vol. 47, No. 138, p. 31810, US Government Printing Office, Washington, D.C. 1980 40 CFR Part 230: Section 404(b)(1) Guidelines for Specification if Disposal Sites for Dredged or Fill Material, Vol. 45, No. 249, pp. 85352-85353, US Government Printing Office, Washington, D.C. Hitchcock, Leo C. and Arthur Cronquist 1973 Flora of the Pacific Northwest: An Illustrated Manual. University of Washington Press. 1990 edition. Kollmorgen Instruments Corporation 1988 Munsell Soil Color Charts. Baltimore, MD. Kunze, Linda M. 1987 Puget Trough Freshwater Wetlands, A summary of Biologically Significant Sites, Phase II: Southern Puget Trough Impounded Wetlands. Washington Natural Heritage Program. Prepared for the Washington State Department of Ecology. Phelps, Marilyn (Cascade Environmental Services) 1993 Wetland Delineation Report. Prepared for City of Renton. Puget Sound Water Quality Authority (PSWQA) 1994 Puget Sound Water Quality Management Plan Reed, Porter B., Jr. 1993 1993 Supplement to the List of Plant Species that Occur in Wetlands: Northwest (Region 9). U.S. Fish and Wildlife Service. 1988a National List of Plant Species that Occur in Wetlands: National Summary. U.S. Fish and Wildlife Service, Biological Report 88(24). 1988b National List of Plant Species that Occur in Wetlands: Northwest (Region 9). U.S. Fish and Wildlife Service, Biological Report 88(26.9). 96038/Report/Wetlands(12/18/96)/p 17 Renton, City of 1992 Critical Areas Inventory Maps. Prepared with assistance from Jones and Stokes, and R.W. Beck. 1992b Wetland Management Ordinance. Chapter 32. U.S. Fish and Wildlife Service 1988 Mercer Island Quadrangle, National Wetland Inventory. U.S. Army Corps of Engineers (Corps) 1994 1993 Supplement to National List of Plant Species that Occur in Wetlands: Northwest (Region 9). March 31. 1992 Clarification and Interpretation of the 1987 Manual. Guidance memorandum. March 6. 1991 Questions & Answers on 1987 Corps of Engineers Manual. Guidance memorandum. October 7. 1990 Permit Requirements for Wetland Fill Projects. Information Paper. Seattle District. April 17. USDA Forest Service 1985 Management of Wildlife and Fish Habitats in Forests of Western Oregon and Washington, Part 1 - Chapter Narratives. Pacific Northwest Region. Published in cooperation with the U.S. Department of the Interior, Bureau of Land Management. USDA Soil Conservation Service 1989 King County Area Hydric Soil List. 1973 Soil Survey of King County Area Washington. Washington Natural Heritage Program (NHP) 1994 Endangered, threatened and sensitive vascular plants of Washington. Department of Natural Resources, Olympia. Washington State Department of Ecology 1993 Wetland Rating System. 96038/Report/Wetlands(12/18/96)/jc 18 APPENDIX A Wetland Map from Original Alignment •/ 1 p 111 I 1 ,71 F` � WETLAND#2 AREA ADJACENT t 4» IT33 "1 "` '3 TO EXISTING Ia ,77 1. - I` ) /• 41 POND • 41 ac..42....s._... A_do,.A._ 134 2.r....,,„,... . . .. ..,.. . . fi��2yt s ^/ t.!1°► 1� `�.. Is7 �oo•a8j7 ». _ x' 1 {1 1 aoa Ss=23i- sia+7 ,aase.� I no ' tql • lag ►._. •\a07 I. It I I f. .a,1 • •,1.t. • ° 1!1 I33 1 `/ 17.vw,!`y- 171 . Y , • . a� . '.i1 " a,I 77oA7 Oan 4ea•,2,)34IA ) et•; , --73I_ lea /y tae -lt.3ti.�' a • •i la ja ao. a./ • ! 5? ter t {wC „ ,a16/ l �_ -.- 7w --/a7: • Ia~,7.7' I I ax 241 ) a Qf• 223 . »e. k $1..s25Z7• •l St NI /►"' J zE.-zt2' i �� ���p "• :n p SCALE 1 =80 FEET 1 in:kt.l. a. v ___' ---1 ti a , �,7 a4o7 I �,t• all ( / Z I Z ►..7 I a,. I I 13T0 / a ' 317 I LARGE PASTURE 1 w I .3.. ` ' 0 ' WETLAND#3 1 "' 1 I e _ �'�•- SMALL DITCH -,, . _ --au _ — (,2)" . " " i I, TRIBUTARY TO •y,. '°` CREEK �' '�'` 1 I r! • 324 a2s �'( II 1• ws aas :7 •.,..1, •• r.►URS ( 1! sea ---s'r'•- SOI • a•i- ) - . . '�•it 11•'.►•.., 377 - - 1.•AM %W.,. _..— ----erg - • vA.,eI 11 t• ti'"-•.0 <>F !na h.c > t " ier/'s'r°"�`15-1- : 2 f 1 "4-7.--.\ WETLAND#1 , ►.A t 0 ) II EAST BANK OF CREEK, ' rotee.i.o so --l's • i'hi • .n. • See NORTH OF ' Is, -:POHL RESIDENCE • O j .n-. KAY RESIDENCE J r- a71 ' 'A' a70 3R 377 71313 : ( 1 I S10 t ' „sr, . II • ..,•� DR. KAY'S PROPERTY .. • : , ale 375 { �.�ee 1 `37e'777 S..543 • a.a IaM 1.]7 rtA 1 .r.•' ,Cr 41. IA: -__ _-"-. "__". — — •�1..1,.._ 710 .fir-.."llass. ?;a2 1 W/ .W. ._ y...._.._ I 417 41. h•w .1• W. • N. E 20TH STREET &14—"• �y.•.'. ."_ --__ 1. • .�—Aje1l 424 FIGURE #4 _ L A • .•/4 ~N1 447•Il' ... PROJECT AREA •••�! •� I. SURVEY MAP EXISTING BERRY FARM ,-......—____ HAMMOND, COLLIER & WADE — LIVINGSTONE ASSOCIATES, INC. / APPENDIX B Wetland Map from Surrounding Property ...... .... . ••••• •• 7,11,46e,-;.*-:••. . . . 1 ! ... . ----- . . ... . .------. 1 • •.I...7-,1"--,••s'.....! •...--.:77,--, ...-J. . • •--v--- . . , . .. ..• . . . ... . . . . . . ; . . . I . . ... . • Vs . .. \ Ns. • - \ \ 4‘ •••. ‘ AI 1 ‘ ... .. / .7-A4c-rpay.....----------/ \ I \ \ 7714 4.r...47•7 . ' I , /71/91 i — • , . . k I I • • .• .:, 'r -4----- r i . — ,i it i ---- • . 1 .. •- .+01111 . a14•er .4 r. ' .\ 21 I N ..› bcP\ Witt!4'..11 .t- 17 e . • . 1..........Imom.o.;;;;.• -- •• • \I • 11: I'% . i i \ I. 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APPENDIX C Growing Season Table • • • TABLE 10.--PROBABILITY OF FREEZING TEMPERATURES AFTER Probability in spring Station Temperature 90 75 50 25 10 percent percent percent percent percent o- Bothell 2 N. 32 Apr. 18 Apr. 30 May 13 May 27 June 7 (elevation 100 feet) 28 Mar. 19 Mar. 30 Apr. 13 Apr. 27 May 8 24 Feb. 7 Feb. 21 Mar. 8 Mar. 21 Apr. 2 Cedar Lake 32 Mar. 21 Apr. 2 Apr. 15 Apr. 28 May 11 (elevation 1,560 feet) 28 Feb. 11 Mar. 1 Mar. 16 Mar. 30 Apr. 11 24 (/) Jan. 29 Feb. 14 Mar. 1 Mar. 15 Landsburg 32 Apr. 15 Apr. 27 May 10 May 24 June 4 (elevation 535 feet) 28 Mar. 4 Mar. 16 Mar. 29 Apr. 11 Apr. 24 24 Jan. 8 Feb. 4 Feb. 19 Mar. 5 Mar. 18 Monroe 2 WSW. 32 Mar. 21 Apr. 3 Apr. 16 Apr. 30 May 12 (elevation 120 feet) 28 Feb. 21 Mar. 5 Mar. 19 Apr. 1 Apr. 14 24 (/) Jan. 28 Feb. 17 Mar. 6 Mar. 17 Seattle-Tacoma Airport 32 Mar. 15 Mar. 27 Apr. 9 Apr. 23 May 4 (elevation 186 feet) 28 Feb. 5 Feb. 23 Mar. 9 Mar. 23 Apr. 4 24 (/) Jan. 18 Feb. 9 Feb. 25 Mar.-9 -_ Seattle University of Washington 32 Feb. 26 Mar. 10 Mar. 23 Apr. 6 Apr. 17 (elevation 113 feet) 28 (/) Jan. 10 Feb. 2 Feb. 17 Mar. 2 24 (1/) (j) Jan. 17 Feb. 6 Feb. 19 Snoqualmie Falls 32 Apr. 11 Apr. 23 May 6 May 20 June 1 (elevation 430 feet) 28 Mar. 6 Mar. 18 Apr. 1 Apr. 14 Apr. 27 24 (i/) Feb. 8 Feb. 24 Mar. 10 Mar. 23 Vashon Island 32 Mar. 10 Mar. 23 Apr. 5 Apr. 18 May 1 (elevation 231 feet) 28 Jan. 14 Feb. 7 Feb. 23 Mar, 8 Mar. 21 24 (/) (/) Jan. 21 Feb. 9 Feb. 24 1/ Not reported. t\\ 90 SPECIFIED DATES IN SPRING AND BEFORE SPECIFIED DATES IN FALL Probability in fall Period between last occurrence 10 25 50 75 90 in spring and percent percent percent percent percent first in fall Days Sept. 12 Sept. 23 Oct. 5 Oct. 17 Oct. 28 145 Oct. 7 Oct. 18 Oct. 30 Nov. 11 Nov. 22 200 Oct. 22 Nov. 2 Nov. 15 Dec. 1 (/) 252 Oct. 10 Oct. 21 Nov. 2 Nov. 14 Nov. 25 201 Oct. 29 Nov. 9 Nov. 22 Dec. 5 Dec. 27 251 Nov. 13 Nov. 25 Dec. 10 (V) (21) 299 Sept. 21 Oct. 1 Oct. 14 Oct. 26 Nov. 6 157 Oct. 21 Nov. 1 Nov. 13 Nov. 25 Dec. 6 229 Nov. 7 Nov. 19 Dec. 2 Dec. 21 (21) 286 Sept. 30 Oct. 11 Oct. 25 Nov. 4 Nov. 15 190 Oct. 22 Nov. 1 Nov. 13 Nov. 26 (/) 239 Nov. 2 Nov. 14 Nov. 27 Dec. 13 (2) 283 , / Oct. 10 Oct. 21 Nov. 2 Nov. 15 Nov. 25 207 // Oct. 26 Nov. 5 Nov. 17 Dec. 2 Dec. 16 253 --_" Nov. 20 Dec. 5 (2) (1j) (J) 325 Oct. 26 Nov. 6 Nov. 18 Dec. 1 Dec`. 11 ' 240 Nov. 21 Dec. 1 Dec. 18 (j) (j) 319 Dec. 3 Dec. 19 (1j) (11) (V) 348 Sept. 16 Sept. 27 Oct. 9 Oct. 21 Nov. 1 156 Oct. 16 Oct. 27 Nov. 8 Nov. 20 Dec. 1 221 Nov. 8 Nov. 19 Dec. 2 Dec. 19 (V) 281 Oct. 15 Oct. 26 Nov. 7 Nov. 19 Nov. 30 216 Nov. 18 Nov. 24 Dec. 9 Dec. 31 (/) 289 Dec. 2 Dec. 16 Dec. 31 (21) (21) 3114 it 91 468-266 0-73-6 APPENDIX D Completed Data Forms ROUTINE WETLAND DETERMINATION - DATA FORM 1987 MANUAL . Project/Site: 141r Sec: Date: /,.\ )loci G'wner: tlP Township: 22,v County: . A/r;-- nvestigator(s): /tit—}— / Range: State: Washington Do Normal Circumstances exist on the site? (Yes No Plot ID: ? 9 (�N Is the site significantly& recently disturbed? (Atypical Situation) Yes �,o->� Transect ID: ' Is the area a potential Problem Area? (explain in final remarks) Yes �N°) Community ID: VEGETATION f{-35., — Dommryina��nrt'Plant Species f Stratum Indicator Dominant !ant Soecies Stratum� Indicator 1. Fka` (,�►�'1d i tec.�.-Le",.. H FA-au6. ,l }-F 1 M Cnt, 2 1 . teA vvafPJk H FA 7. 1 1 p,o C2' 5� Ff Lu 3. J 4.1AJo L Z&c A J-1 -�l I u l) 8• rb't%k..lz FJuI S/i1.4CA.4._ 4.DI't,11A,UkA CJ A t L) 1,,2 'clY.L > I-'` elc-(4,0--- 9. 1 , 5. A611r V\fror t ye-QA-•-• 1+ FACIA 10. • Percent of Dominant Species that are 0 Hydrophytic Vegetation Present? :es No OBL,FACW or FAC(excluding FAC-) % Basis for determination: E REMARKS: ?v'° O la IelA+ � HYDROLOGY Recorded Data(Describe in Remarks): PRIMARY Indicators SECONDARY Indicators Stream, Lake or Tide Gauge Inundated Oxidized Root Channels in Upper 12' Aerial Photographs Saturated in Upper 12' Water Stained Leaves — Other Water Marks Local Soil Survey Data None Drift Lines FAC-Neutral Test Sediment Deposits Other(Explain in Remarks) Drainage Patterns in Wetlands Field Observations Depth of Surface Water. IV,k (in.) Depth to Free Water in Pit: I (in.) Depth to Saturated Soil: 8 (in.) Wetland Hydrology Present? Yes' No REMARKS: Basis for determination: a d l cv, O 3 SOILS 1 Soils Mapped As: h d l 010k 1 tAw. SQhr Drainage Class: Field Observations Taxonomy(Series and Phase): Confirm Mapped Type? Yes No Profile Description: Depth Matrix Color . Mottle Colors Mottle (inches) Horizon (Munsell Moist) SMunsell Moist) !Abundance/Contrast' Texture. Concretions.Structure. etc, o d�5 in`lR3/ti _ 5 Wi 4 ps*-,{ c\--Ict av"y loV P- 61'2 1.;i16�g41 sQ Hydric Soil Indicators: Histosol Reducing Conditions _ Organic Streaking in Sandy Soils Histic Epipedon Gleyed or Low Chrome Colors _ Listed on Local Hydric Soils List Sulfidic Odor _ Concretions Listed on National Hydric Soils List Aquic Moisture Regime High Organic Content in Surface Layer in Sandy Soils Hydric Soils Present? + No - REMARKS: Basis for determination: lit1/4) -i v WETLAND DETERMINATION I Is this Sampling Point Within a Wetland? ,Y'e ; No INVESTIGATOR: Basis for determination: - CkifJ. 41,A.A0.......... ROUTINE WETLAND DETERMINATION - DATA FORM 1987 MANUAL Pro' ite: f i ''>- - c Sec: Date: r%/ �,i�1 co plica ('caner: t!= 1 N Township: 1Tn� County: v /iJ4- gator(s): 1 _7~� Range: E. State: Washington Do Normal Circumstances exist on the site? es' No Plot ID: P Is the site significantly& recently disturbed? (Atypical Situation) Yes ;.No' Transect ID: Is the area a potential Problem Area? (explain in final remarks) Yes .-Na Community ID: VEGETATION Dominant Plant Species Stratum Indicator VorVfntCl:-"lant Species Stratum Indicator 1. 7.4.1t- , rLS coo- -... i itc1-t s. 0ev+A144•t� c i- La, c tt f' C-- 2 1 5 p ? L 7.40-L /1/�A.?�0rk�/(owt 3./6)111.4.4.1) 12 t vc `T" - Flirt_ 8. SC1/I 1 r,OL R _ FA 0,41 4. 9. S Gyt t G Ai t„cct:C,,-- S Q P FACG 5. 10..�f U -&5 a -7 Y1k^ I(.1S H I nel .1/ Percent of Dominant Species that are r,,�-7 Hydrop// es hytic Vegetation Present? No OBL,FACW or FAC(excluding FAG-) (1� / 14 Basis for determination: y 7o) REMARKS: slop_HYDROLOGY Recorded Data(Describe in Remarks): PRIMARY Indicators SECONDARY Indicators Stream, Lake or Tide Gauge Inundated Oxidized Root Channels in Upper 12* Aerial Photographs Saturated in Upper 12" Water Stained Leaves Other Water Marks Local Soil Survey Data None Drift Lines FAC-Neutral Test Sediment Deposits Other(Explain in Remarks) Drainage Patterns in Wetlands Field Observations , Depth of Surface Water. i\-' , (in.) Depth to Free Water in Pit: 24 (in.) Depth to Saturated Soil: 7- -t (in.) Wetland Hydrology Present? Yes .No REMARKS: V'2t S) So r I Basis for determination: A,d 11.,\ a 1 -1vs /�-'ln�r tk tA.) ,1 V�uv-e 'w /x. 4 ort '�O p SOILS ( / t _ 0n�� IX�'1 Soils Mapped As: I d-C4. o(cc , OU �►va.. cctQ Drainage Class: Field Observations Taxonomy(Series and Phase): Confirm Mapped Type? Yes No Profile Description: Depth Matrix Color . Mottle Colors Mottle JjnchesI Horizon fMunsell Moist) (Munsell Moisti JAbundance/Contrast) Texture. Concretions. Structure. etc. 6-9 din l 0-iI -Zl1 . 5...„-_Lt,, w/ o ra a✓ti,rr q ._i g 11 lo`I I1- Co� 4/3 Il 1 I - 6 Sitj► -- ,r�i J .- %—a Li f 1 l I o P- (0l24l- 5shroli ck 11 11 Hydric Soil Indicators: Histosol Reducing Conditions ( 'Organic Streaking in Sandy Soils �IS�4 Histic Epipedon }( Gleyed or Low Chroma Colors _ Listed on Local Hydric Soils List Sutfidic Odor — Concretions _ Listed on National Hydric Soils List Aquic Moisture Regime _ High Organic Content in Surface Layer in Sandy Soils Hydric Soils Present? Ye No - REMARKS: 42,f. Qc-t �� 5 w Basis for determination: 'C o-(ili-J vJ C1��oy,h IAA v�� 1� 1,-14 �1 C� WETLAND DETERMINATION u . Is this Sampling Point Within a Wetland? Yes 10 INVESTIGATOR: frl 1-1--\--------. Basis for determination: ' tG v-01 vvl [�✓✓Csen ROUTINE WETLAND DETERMINATION] - DATA FORM 1987 MANUAL Pro;ec1JSite: Nl GI B 'rt.:- Sec: `> Date: c�� Applicant/Cwner: y✓i✓u roN Township: County: k'/ JC.- Investigator(s): /-i 7 Y J1 Range: State: Washington l Do Normal Circumstances exist on the site? No Plot ID: (7)-N P -7 Is the site significantly& recently disturbed? (Atypical Situation) Yes , r�J►' Transect ID: Is the area a potential Problem Area? (explain in final remarks) Yes .40 Community ID: VEGETATION D� La Dominant Plant Species Stratum Indicator m�i'nant Plant oecies Stratum Indicator� 1. 121A1V) r�14Co Io✓ Ck F 1A 6. 1"/OPn+�4 I w 40L�. T _ Z 51- 2� t --;21 �a��c� � �A('.I,v 7. 5��•�c� V�C.�.►�o. .a FRC.t.d L /�'- F A) 3. ��VQ� �Ov1q}d4�1- t J� - ��'4�� 8. Cal-� i i!C,‘G,��t,A..c� Sqf 4. /'11YWS L4��jvc� Iv AC 9. ► lA"436t. -. tr .C-•i *k_,s . S Fv'L 5. 10.(1r ae4 t1•5 c10 lc•�;i ►" PI S Percent of Dominant Species that are HyFfrophytre Vegetation rF esent? -Cp) No OBL,FACW or FAC(excluding FAG) "75 % Basis for determination: s A �j w.,.. '7 J-0r/0 wL V2< . REMARKS: NG v Mk+h `'_I Lt k 1 hl lue.C.e� A,, � i- 'ice 1.c- (plaid QI eLh s HYDROLOGY Ile- ' ai°'bi`s .Recorded Data(Describe in Remarks): PRIMARY Indicators SECONDARY Indicators Stream, Lake or Tide Gauge Inundated Oxidized Root Channels in Upper 12- Aerial Photographs Saturated in Upper 12- Water Stained Leaves Other Water Marks Local Soil Survey Data None Drift Lines FAC-Neutral Test Sediment Deposits Other(Explain in Remarks) Drainage Patterns in Wetlands Field Observations )i Depth of Surface Water. (in.) Depth to Free Water in Pit: -2ZL t t (in.) Depth to Saturated Soil: 7Zy (in.) Wetland Hydrology Present? dp No REMARKS: }T Basis for determination: „c- fa 4� 4 \_,Q in suvi_ 004,4 o dw_-1 4 NA SOILS Mapped I L. T � (J 9 Soils Ma ed As: Y�� 1�SDI � !�A w1 � t hG �..t'/� Drainage Class: Q Field Observations Taxonomy(Series and Phase): Confirm Mapped Type? Yes No Profile Description: Depth Matrix Color . Mottle Colors Mottle finches) Horizon jMunsell Moistlt jMunsell Moist) (Abundance/Contrast) Texture.Concretions.Structure. etc, b-10 Io\/i2 3 l cE+.v co^c/J t T Io_�tt \1Q,O!2cl,i 1,5y$--ifo q►�ltJ Stiaio V v �0 J , • Hydric Soil Indicators: Histosol Reducing Conditions _ Organic Streaking in Sandy Soils Histic Epipedon _ Gleyed or Low Chroma Colors _ Listed on Local Hydric Soils List _ Sulfidic Odor " Concretions Listed on National Hydric Soils List _ Aquic Moisture Regime _ High Organic Content in Surface Layer in Sandy Soils ' (.c��n Hydric Soils Present? Yes No REMARKS: � jlrtp`�'� t� J� � •6LU/. 6 • Basis for determination: ' d kt ✓ova G v!1 M�.\..1•-I� \ f � _ WETLAND DETERMINATION . Is this Sampling Point Within a Wetland? E-Eos.) No INVESTIGATOR: Basis for determination: • . ROUTINE WETLAND DETERMINATIC DATA FORM 1987 MANUAL Project/Site: --}t Ci cc Sec: ' Date: CApplicarlt7Cwner: h - Township: 2-;2 r} County: • ,-, Invesfigator(s): /4 9- -- Range: 1 State: Washington ce Do Normal Circumstances exist on the site? s No Plot ID: SI D co Is the site significantly& recently disturbed? (Atypical Situation) Yes ,1Vo Transect ID: Is the area a potential Problem Area? (explain in final remarks) Yes . o Community ID: VEGETATION Dominant Plant Species Stratum Indicator Dominant Dominant Plant Species Stratum Indicator 1. +.t 1 AI S Co t Q"-/ 51A F la.i 6. 2 7. 3. - 8. 4. 9. 5. 10. • Percent of Dominant Species that are -4 Hydrophytic Vegetation Present? Yes v' OBL.FACW or FAC(excluding FAC-) G'- % Basis for determination: 0 >' I iG'1 r o b'✓S REMARKS: -}-1 �e k c Y�� t �y."}"- 131 4 C.�k b _-- HYDROLOGY .Recorded Data(Describe in Remarks): PRIMARY Indicators SECONDARY Indicators Stream, Lake or Tide Gauge Inundated Oxidized Root Channels in Upper 12" Aerial Photographs Saturated in Upper 12" Water Stained Leaves Other Water Marks Local Soil Survey Data None Drift Lines FAC-Neutral Test Sediment Deposits Other(Explain in Remarks) Drainage Patterns in Wetlands Field Observations � h Depth of Surface Water. I" A (in.) Depth to Free Water in Pit: 7 7L'' (in.) Depth to Saturated Soil: > -' (in.) Wetland Hydrology Present? Yes co--- REMARKS: Basis for determination: SOILS Soils Mapped As: Iv\ \ CA v\ nl.u ba VN N2 Saviej Drainage Class: Field Observations Taxonomy(Series and Phase): Confirm Mapped Type? Yes No Profile Description: Depth Matrix Color . Mottle Colors Mottle finches). Horizon (Munsell Moiistl jMunsell Moist1 (Abundance/Contrast) Texture. Concretions. Structure. etc. 0-10 ION1 (Z3/Z h(o Y“2- .min 01 CA Li 0Y4•G VI'�� \O 4)fi l o‘{ (�.4/4 11 v-.ei Li\ c 1(4 - 2\ lot ct- 5/17 Say.st. s 1,,\n4" c4.i.s (,o l.o na+ or) V @.J V1 S C'I ra. Hydric Soil Indicators: Histosol _ Reducing Conditions — Organic Streaking in Sandy Soils Histic Epipedon _ Gleyed or Low Chroma Colors _ Listed on Local Hydric Soils List _ Sulfidic Odor _ Concretions _ Listed on National Hydric Soils List Aquic Moisture Regime _ High Organic Content in Surface Layer in Sandy Soils Hydric Soils Present? Yes (No i REMARKS: H b-4-''c ea a1� 1, e,,,p,,c, -I n Basis for determination: , ��ca- ,,S so' ) WETLAND DETERMINATION I" ' Is this Sampling Point Within a Wetland? Yes No INVESTIGATOR: Basis for determination: - `� No we cva \AAci4Cal �5 ROUTINE WETLAND DETERMINATIC DATA FORM 1987 MANUAL Project/Site: ; 2,/A-(L : Sec: • Date: cS / n /96- tpplicant/Pwner: -' / 4-.1,i/zr.,.-- Township: 7'2, County: 1' (i'c Investlgator(s): i't .t Range: . State: Washington J ^ Do Normal Circumstances exist on the site? (Yes No Plot ID: �j^ , Is the site significantly & recently disturbed? (Atypical Situation) -Yes 7No) Transect ID: Is the area a potential Problem Area? (explain in final remarks) des e Community ID: VEGETATION- L 1-_�________ ) 7ti✓ 0fil ,¢�'1 yr T Dominant Plant Species Stratum Indicator a "`�'+`'-t Plant Species Stratum Indicator 1. phcJGt o Cf�l' l-a C..-C. j"1_._ Aa.) 6. l..l�,�wC /1 V,A IA., ( J�vfl�K.,, t-1 �Lt 4c-__, 14 2. r S Pio 62„,c.t - �riUa 7. 3. Cf.C1 LA 5 c tkft4t-in4c-cck . 1=-.1 - F/ ak) 8. 4. 9. 5. 10. Percent of Dominant Species that are �} Hydrophytic Vegetation Present? �(es No OBL, FACW or FAC(excluding FAC-) (f2 / % Basis for determination: 7Som U-X- REMARKS: Hovst i_ -Q (t)A -W- i 1/' ef-1 CO On 5VC4,Y) saw , 0 HYDROLOGY Recorded Data (Describe in Remarks): PRIMARY Indicators SECONDARY Indicators Stream, Lake or Tide Gauge Inundated Oxidized Root Channels in Upper 12- Aerial Photographs Saturated in Upper 12' Water Stained Leaves Other Water Marks Local Soil Survey Data None Drift Lines FAC-Neutral Test Sediment Deposits Other(Explain in Remarks) Drainage Patterns in Wetlands Field Observations !/ t !I/ Depth of Surface Water. ti�� (in.) Depth to Free Water in Pit: >1 8 (in.) Depth to Saturated Soil: 1 vJ (in.) Wetland Hydrology Present? L s; No REMARKS: Yt .Sq'f lA_..2.4. Q e lU )I Basis for determination: 12 _cif- 4.v N,� � III 6�`Kw,1,�a[ �,,� 1 / j i �----�— SOILS Soils Mapped As: C a.�(',Gtti OWt t�k /10 d t arid- G�. i oa ii,1� �"Drainage Class: Field Observations Taxonomy(Series and Phase): Confirm Mapped Type? Yes No Profile Description: Depth Matrix Color . Mottle Colors Mottle finches! Horizon 1Munsell Moist! (Munsell Moist) !Abundance/Contrast) Texture. Concretions. Structure. etc, O_ 7 (0�g_.3/2 0° rvC A 11►^ttc.lc_ 7-lit' la`/r�51z �SY�$1� . wick .� uP x\P"� i/elU - 1(14 10 •S 1- I CI- ./to s1 I c\ki- SemelSO--)4/1-CtMtA Hydric Soil Indicators: Histosol Reducing Conditions _ Organic Streaking in Sandy Soils Histic Epipedon N. Gleyed or Low Chroma Colors _ Listed on Local Hydric Soils List --C Sutfidic Odor —7, Concretions _ Listed on National Hydric Soils List Aquic Moisture Regime _ High Organic Content in Surface Layer in Sandy Soils Hydric Soils Present? �Y s No REMARKS: r: -Si. --v'- .I.-`c'' Basis for determination: LAW _c v-pvkAa to/ riwo4f.4.� WETLAND DETERMINATION —� •t Yes Ls this Sampling Point Within a Wetland? No INVESTIGATOR: 0• '� " Basis for determination: et/ii (ur n Cl^ Cc -11-t S _CF-- ROUTINE WETLAND DETERMINATIC '' DATA FORM 1987 MANUAL Project/Site: t!N(,P,i Sec: ) Date: /k/ %'r' Applicant/Cwner: `' / e-..-- --,r. Township: 'cry County: ` •r/N6- Investigator(s): /V)-cr-�-; Range: ' State: Washington - / Do Normal Circumstances exist on the site? No Plot ID: P 4-- Is the site significantly & recently disturbed? (Atypical Situation) OF No Transect ID: Is the area a potential Problem Area? (explain in final remarks) Yes :KIo Community ID: VEGETATION Dominant Plant Species Stratum Indicator Dominant Plant Species Stratum Indicator 1. FOV1 Uvy,t).�.,u r-t.fLc,-s 14Rita) s. 2. 14 k , 2 s I a h t:+u q _ 7- 3. . `9 H 8. • 4, J a IrGtlSr` 3.1 9. 5. 10. • Percent of Dominant Species that are Hydrophytic Vegetation Present? es No OBL.FACW or FAC(excluding FAC-) % Basis for determination: -1144,`'S1,‘ o -.1 SJc-' REMARKS: extrecA "1n.. s-e ( aw0vL Ike- jj.ly6.1_4-c.JQ LL-rur I' am„ r HYDROLOGY -j • Recorded Data(Describe in Remarks): PRIMARY Indicators SECONDARY Indicators Stream, Lake or Tide Gauge Inundated Oxidized Root Channels in Upper 12" Aerial Photographs '-C Saturated in Upper 12" Water Stained Leaves Other Water Marks Local Sol Survey Data None Drift Lines FAC-Neutral Test Sediment Deposits Other(Explain in Remarks) Drainage Patterns in Wetlands Field Observations I ) 1 // H Depth of Surface Water. N� (in.) Depth to Free Water in Pit: (/"Z. (in.) Depth to Saturated Soil: '�` (in.) Wetland Hydrology Present? Yes No REMARKS: Sar_.I /troy s ►v-, Jo 3" J5Oa4a Basis for determination: CA 1 SOILS i' Soils Mapped As: S1 Ct I 1 /'YNu C. Drainage Class: Field Observations Taxonomy(Series and Phase): Confirm Mapped Type? Yes No Profile Description: Depth Matrix Color . Mottle Colors Mottle .... finches) Horizon IMunsell Moist) (Munsell Moist) (Abundance/Contrast) Texture. Concretions.Structure. etc. 0—CI IOy 12,-. /I Ito U rIL .y 132,2 dr pc) ckect/4)t.-cs--- ,,I... > I Z 7.5\IP-2f 0 krit.v,ic Hydric Soil Indicators: Histosol Reducing Conditions _ Organic Streaking in Sandy Soils Histic Epipedon _ Gleyed or Low Chroma Colors _ Listed on Local Hydric Soils List Sulfidic Odor — Concretions _ Listed on National Hydric Soils List Aquic Moisture Regime High Organic Content in Surface Layer in Sandy Soils Hydric Soils Present? Yes, No REMARKS: P 1 & '� Basis for determination: 446 WETLAND DETERMINATION - ; . Is this Sampling Point Within a Wetland? es No INVESTIGATOR:= Basis for determination: - *— ROUTINE WETLAND DETERMINATIO" - DATA FORM 1987 MANUAL Pro;ecj Site: /=*i ,r-A--(' : Sec: Date:-- o/7 7b p4pp"Iica pivner: tz-i•mil--,__- Township: 1 f,r) County: . !i ii;i4— •InvesIigafor(s): n^ -C,..-, Range: c;k State: Washington Do Normal Circumstances exist on the site? s No Plot ID: C)v - 3 Lr� Is the site significantly & recently disturbed? (Atypical Situation) Yes Transect ID: Is the area a potential Problem Area? (explain in final remarks) Yes �No) Community ID: VEGETATION 50 r Dominant Plant Species Stratum Indicator porriri (Plant Species Stratum Indicator `„ 1. li 1 (14✓c.k -r" Ric., 6. C)tAs C OVA Vs." <-4 k Nr - t il 2. `L.ci . tel atei G H FA 7. O / •a c Srio^^- L M.- (.1) 3. 114-010 a;•SC4,1ov ` ( % _ FA0.4 8(fl,\Vo1Vt LLS Sep I ("% A �141n2. / 4. 9.50AUS Cu a„P4,-et _541_ CZ) 5. .. po. -( C..„. c_, 5arI t4J Percent of Dominant Species that are Hydrophytic Vegetation Present? Ke.s No OBL.FACW or FAC(excluding FAC-) % Basis for determination: o _ ..:.:rf > S.'o /0 vao5 ` REMARKS: ' tlhvv�-tv\ r\.,� ail aiU wa ;J tv 61 Cis— s HYDROLOGY ::.Recorded Data(Describe in Remarks): PRIMARY Indicators SECONDARY Indicators - Stream, Lake or Tide Gauge Inundated Oxidized Root Channels in Upper 12' Aerial Photographs Saturated in Upper 12' Water Stained Leaves Other Water Marks Local Soil Survey Data . None Drift Lines FAC-Neutral Test — Sediment Deposits Other(Explain in Remarks) Drainage Patterns in Wetlands Field Observations Depth of Surface Water. NA- (in.) Depth to Free Water in Pit: -f I� 1 On.) Depth to Saturated Soil: (in.) 11 Wetland Hydrology Present? (Yes) No REMARKS: d :'-. Q 4344 C^� b j tit t I Basis for determination: Q11 1 1 `� n`'O SJ 1K �UvtAv c hlf 1kAf.Gv ?a[qt Ot'1 SOILS II ft Soils Mapped As: S kG 1 L t _. Mu Gk.- Drainage Class: Field Observations Taxonomy(Series and Phase): Confirm Mapped Type? Yes No Profile Description: Depth Matrix Color . Mottle Colors Mottle finches) Horizon Munsell Moist). (Munsell Moist) (Abundance/Contrast) Texture.Concretions. Structure. etc. 0-1 z 1 a1 2/( /6o I Si-" cA tic.. t, Ali ) 71ti1j 101123r 1 10\I IL +,,wf s� it • _Cc)'yb) • Hydric Soil Indicators: - Histosol - Reducing Conditions — Organic Streaking in Sandy Soils ..Histic Epipedon 7- Gleyed or Low Chroma Colors _ Listed on Local Hydric Soils List _ Sutfidic Odor Concretions Listed on National Hydric Soils List _ Aquic Moisture Regime High Organic Content in Surface Layer in Sandy Soils n Hydric Soils Present? Y No REMARKS: Basis for determination: \OU:) t.J.Av-bVV.GI WETLAND DETERMINATION Is this Sampling Point Within a Wetland? Yes. No INVESTIGATOR: /`r/"C k Basis for determination: - ;. / 1 LC)\\ \a.�a \ i - / � C - ROUTINE WETLAND DETERMINATIC`" DATA FORM 1987 MANUAL Prclect/Site: ri l i� 7y Sec: ' Date: 877/q6 pplicani!C'wner: L I7'-1 O=- i ,,�"c J Township: 2?nJ County: iN/.-r— Investigator(s): /v 7 'i Range: '* State: Washington Do Normal Circumstances exist on the site? • Yes No Plot ID: c P- Z Is the site significantly & recently disturbed? (Atypical Situation) Yes (.N ) Transect ID: Is the area a potential Problem Area? (explain in final remarks) Yes :J Community ID: VEGETATION , Dominant Plant Species Stratum Indicator Dominant Plant Species Ssratum Indicator 1. 121 t IDU6 -- 71(0C.A`ek {cl&olc Ff 6.Pn.V..v5 `%':r;^:1...‘A" ' 7 _ G(.) 2. . yLt`3-uw TP.\ CATPE I ► FACIA 7. S4Y 5 rW p1.•A - M 3. VOFV� �\f �SwtU►lv. A - l4� 8. T 4. 9. 5. 10. Percent of Dominant Species that are Hydrophytic Vegetation Present? 0 No OBL, FACW or FAC(excluding FAC-) "3 % Basis for determination: 6/ 4LbGv� ��'"� , REMARKS: et 0..-t.,f-/.._1 p(r,,,,, J HYDROLOGY Recorded Data(Describe in Remarks): PRIMARY Indicators SECONDARY Indicators Stream, Lake or Tide Gauge Inundated Oxidized Root Channels in Upper 12- Aerial Photographs Saturated in Upper 12' Water Stained Leaves Other Water Marks Local Soil Survey Data — None Drift Lines FAC-Neutral Test Sediment Deposits Other(Explain in Remarks) Drainage Patterns in Wetlands Field Observations Depth of Surface Water. /U r (in.) Depth to Free Water in Pit: 15- (in.) Depth to Saturated Soil: /7 (in.) Wetland Hydrology Present? Yes No REMARKS: Basis for determination: �. t 1 I N Ut)P� ' 2-I I WI (I cJ ' Stm i pXf�- - fi t L SOILS Lo- . �- r l3 t✓a-w:,cJ cry c✓'` Soils Mapped As: SA Cie(,,.� mu Drainage Class: Field Observations Taxonomy (Series and Phase): Confirm Mapped Type? Yes No Profile Description: Depth Matrix Color . Mottle Colors Mottle finches1 Horizon SMunsell Moist) (Munsell Moistl (Abundance/Contrast) Texture. Concretions.Structure. etc. 0 fv 1Q'i•(L2P/Ikt4 u r k J J Hydric Soil Indicators: _ Histosol — Reducing Conditions _ Organic Streaking in Sandy Soils -1 Histic Epipedon — Gteyed or Low Chrome.Colors _ Listed on Local Hydric Soils List -+� Sutfidic Odor Concretions _ Listed on National Hydric Soils List _ Aquic Moisture Regime -& High Organic Content in Surface Layer in Sandy Soils Hydric Soils Present? Yes; No - REMARKS: Basis for determination: -`Jn 1 S 3 C- °Lr1�;Cd 0 h _— -« _ WETLAND DETERMINATION • Is this Sampling Point Within a Wetland? Yes No INVESTIGATOR: �?'• �'�' •^ Basis for determination: • 1 i,, rjuL r7 L -',k ROUTINE WETLAND DETERMINAT - DATA FORM 1987 MANUAL ioject/Site: t-i;6/(E Sec: S Date: I7 Iq b plicanjLCwner: C.►" l7._- I<4-ti(ON Township: 2 3 r� County: 1� /I\l F Investigator(s):_ + /: ''A--; Range: 5 - State: Washington tk _ 4cAA\ 2oti:. 4- /. - -1i-y `3Ao.-c,,c, s^ :Sl�f- Sl�� r'v1v, -(---.)-- Do Normal Circumstances exist on the site? U i (Yes' No Plot ID: P — I Is the site significantly & recently disturbed? (Atypical Situation) Yes (Noj Transect ID: Is the area a potential Problem Area? (explain in final remarks) Yes 'No� Community ID: VEGETATION Jp Dominant Plant Species Stratum Indicator Demirrant Plant Species Stratum Indicator ,. Sp\t-aect dc,..,cktadIki., 5k FACIA) 6. A/hus rub► � s.- V-76.- ny [' l ' 1 ' I �, f 2. /l"I by`�1 A^ T I t{t'1- tC),` ''-'• IA � C� 7.�'o v,�l o l u l v 4 se 1,i u 6v, T�l N P— 3. J�UlSef- ±Q-I\iva+�?I G k _Flick)}ck) 8. 4. t`t.1 bus p v6 C cc 61i.5colov- 5 k Pita l t✓r 9. 5. 10. ' Percent of Dominant Species that are Hydrophytic Vegetation Present? es No OBL, FACW or FAC(excluding FAC-) ' S % Basis for determination: 5d°% 1— v , REMARKS: a� ---___--- -I •':2 1s ai faJi ac E1 b. - x Ov 6,+asutl x -fav .a-s-A'a— HYDROLOGY /Fr 2S S✓a�J1s Recorded Data (Describe in Remarks): PRIMARY Indicators SECONDARY Indicators Stream, Lake or Tide Gauge Inundated Oxidized Root Channels in Upper 12" Aerial Photographs Saturated in Upper 12" Water Stained Leaves Other Water Marks Local Soil Survey Data None Drift Lines FAG-Neutral Test Sediment Deposits Other(Explain in Remarks) Drainage Patterns in Wetlands Field Observations Depth of Surface Water. i\' (in.) Depth to Free Water in Pit: Ca" (in.) Depth to Saturated Soil:Su✓ A (in.) Wetland Hydrology Present? 616-3 ;s No REMARKS: Basis for determination: -J SOILS Soils Mapped As: '5 G I Cay iv, C k Drainage Class: Field Observations Taxonomy(Series and Phase): Confirm Mapped Type? No Profile Description: Depth Matrix Color . Mottle Colors Mottle finches) Horizon IMunsell Moist). JMunsell Moistl (Abundance/Contrast) Texture. Concretions. Structure. etc. D—lL 1o`ui Z/( wtuGk very 5/iPP cr Hydric Soil Indicators: Histosol Reducing Conditions _ Organic Streaking in Sandy Soils -,( Histic Epipedon _ Gleyed or Low Chroma Colors — Listed on Local Hydric Soils List Sulfidic Odor _ Concretions _ Listed on National Hydric Soils List Aquic Moisture Regime High Organic Content in Surface Layer in Sandy Soils Hydric Soils Present? es No REMARKS: Basis for determination: WETLAND DETERMINATION , i . Is this Sampling Point Within a Wetland? (Yes) No INVESTIGATOR: l''�c- ., ' Basis for determination: at LI J 1 a L'(NA aevo APPENDIX E Earthen Trench Plug TRENCH PLUG WITH SELECTED LOS' PER$£ABL£. NoNDISPERSIBLE CLAY LIATERt AL. WIN.PLASTICITY 'NEE: of IOL po1PACrEO To 95% RELATIVE COMPACTION. SEE NOTE 2. — TOP Of TRENCH • • BACKf/LL AS tol REOUIREO _ 1. t 111111 •-,Yo • TRENCH _ 00170M -jti.' IPIPE `h . OU►NG SCE NOTE J NorES: 1. TRENCH PLUG SHALL 8E KEYED INTO EACH SIDE AND BOTTOM OF TRENCH A MINIMUM Of 64. 2. WHERE SUITABLE IMPERVIOUS MATERIAL IS NOT AVAILABLE. LEAN lax CONCRETE WAY BE SUBSTITUTED. J. PROVIDE TRENCH PLUGS AT LOCATIONS A/IO INTERVALS SPECIFIED. • EARTHEN TRENCH PLUG B