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HomeMy WebLinkAboutSWP271791FOR DISTRIBUTION TO: Water Utility F Wastewater Utility lf' Surface Water Utility Maintenance Services ram FA Transportation Systems Project: Building Division Public Works Constr Inspector Fire Prevention S Location: `1�s lwr Attached please find copies of: PERMIT a Lam" RECEIPT# LETTER OF SPECIAL BILLING STUB SERVICE AGREEMENT PRECON NOTES 0 PRECON ATTENDEES l7 DRAINAGE REPORT rx FA MEMO - WATER BREAKDOWN Fa W MAP WITH NEW MAINS AND VALVES OTHER GEt)-r-ri4d IC A knffl l From: / 0 C', Date: 1 C:TB:PRECON:DISTFRM BILLS OF SALE COST DATA INVENTORY EASEMENT(S) COPY OF AS -BUILT GEOTECHNICAL ENGINEERING STUDY PROPOSED SEATTLE PACKAGING WAREHOUSE 34TH AVENUE SOUTHWEST AT SPRINGBROOK CREEK RENTON, WASHINGTON E-6955 INTRODUCTION General This report presents the results of the geotechnical engineering study completed by Earth Consultants, Inc. (ECI) for the proposed Pacific Rim Supply Warehouse located at Southwest 39th Street and Raymond Avenue Southwest in Renton Washington. The general location of the site is shown on the Vicinity Map, Plate 1. The purpose of this study was to explore NO the subsurface conditions at the site and develop geotechnical recommendations for the proposed site based on the conditions encountered. At the time our study was performed, the building location, and our exploratory location were approximately as shown on the Boring Location Plan, Plate 2. J 0' Project Description We understand it is planned to develop the site with a slab -on -grade "tilt -up" concrete structure with dock -high fill. The remainder of the site will consist of asphalt pavement areas and landscaping. At the time this report was written, specific structural design information was not available. However, based on our experience with similar projects, we would anticipate the following structural loads: • Wall Loads - 3 to 4 kips per lineal foot • Column Loads - 75 to 125 kips • Slab Loads - 250 pounds per square foot If any of the above design criteria are incorrect or change, we should be consulted to review the recommendations contained in this report. In any case, ECI should be retained to perform a general review of the final design. Earth Consultants, Inc. GEOTECHNICAL ENGINEERING STUDY Adventure 95 E-6955 August 30, 1995 Page 2 SITE CONDITIONS Surface The subject site is located in the Orillia Business Park at the intersection of Southwest 39th Street and Raymond Avenue Southwest in Renton, Washington (see Plate 1, Vicinity Map). The irregular shaped property ranges between approximately six hundred twenty-five (625) feet and nine hundred fifty (950) feet in the east -west direction. In the north -south direction, the property extends between approximately two hundred (200) feet and three hundred seventy-five (375) feet. The site is bordered on the south by an existing warehouse, and on the north and east by Southwest 39th Street and Raymond Avenue Southwest, respectively. Springbrook Creek is located to the west. of the site. The majority of the site is currently paved and is functioning as a parking area. The majority of the site topography is relatively flat. Subsurface The site was explored by drilling one boring at the approximate location shown on Plate 2. In evaluating the subsurface conditions, a previously drilled borehole by another firm was also reviewed. Please refer to the Boring Log, Plate A2. for a more detailed description of the conditions encountered at the location explored. A description of the field exploration methods is included in Appendix A. The following is a generalized description of the subsur- face conditions encountered. Fill It appears that the existing pavement is immediately underlain by approximately five feet of fill. This soil unit was generally classified as medium dense, poorly graded sand with silt, and silty sand with gravel (Unified Classifications SP-SM- and SM). In the upper portions of the existing fill we encountered two inch to three inch cobbles. This soil unit may be suitable for support of foundation elements, slab -on -grade floors and pavements, provided the fill is prepared in accordance. with the recommendations discussed in the "Site Preparation and Genera/ Earthwork" section of this report. Native Our exploration indicates the fill is generally underlain by approximately five feet of loose organic silt and clayey silt. Below this deposit, at approximately ten feet below the existing surface, loose to medium dense, water bearing poorly graded sand and silty sand were encountered to the depths explored. Earth Consultants, Inc. GEOTECHNICAL ENGINEERING STUDY Adventure 95 E-6955 August 30, 1995 Page 3 Groundwater Groundwater was observed in the sand and silty sand encountered at approximately ten feet below existing grade. However, the groundwater level is not static; therefore, one may expect fluctuations in the level depending on the season, amount of rainfall, surface water runoff, and other factors. Generally, the water level is higher and seepage rate is greater in the wetter winter months (typically October through May). Laboratory Testing Laboratory tests were conducted on several representative soil samples to verify or modify the field soil classification and to evaluate the general physical properties and engineering characteristics of the soil encountered. Moisture content tests were performed on all samples. The results of laboratory tests performed on specific samples are provided in Appendix B, or at the appropriate sample depth on the boring log. It is important to note that these test results may not accurately represent the overall in -situ soil conditions. Our geotechnical recommendations are based on our interpretation of these test results and their use in guiding our engineering judgement. ECI cannot be responsible for the interpretation of these data by others. In accordance with our Standard Fee Schedule and General Conditions, the soil samples for this project will be discarded after a period of fifteen days following completion of this report unless we are otherwise directed in writing. DISCUSSION AND RECOMMENDATIONS General Based on the results of our study, it is our opinion that the proposed development can be constructed generally as planned provided the recommendations contained in this report are incorporated into the final -design. The critical geotechnical aspects of the planned development are primarily associated with foundation support and reducing post construction settlements. To reduce post construction settlements a successful preload program should be completed. The purpose of the preload program is to induce the primary settlement of the underlying compressib.le soil, and reduce the amount of post -construction settlement. We estimate post construction total and differential settlements, after completion of the preload program, could be on the order of one and one-half inches and one inch, respectively. If this amount of settlement is not acceptable, a surcharge program should be considered. Recommendations for a surcharge will be provided upon request. After completion of a successful preload program, the proposed structure may be supported by conventional spread and continuous footings bearing on at least two feet of structural fill. Recommendations for a preload program, and preparation and compaction of the existing fill, are presented in the following sections of this report. a,f Earth Consultants, Inc. GEOTECHNICAL ENGINEERING STUDY Adventure 95 E-6955 August 30, 1995 Page 4 This report has been prepared for specific application to this project only and in a manner consistent with that level' of care and skill ordinarily exercised by other members of the profession currently practicing under similar conditions in this area for the exclusive use of Seattle Packaging and their representatives. No warranty, expressed or implied, is made. This report, in its entirety, should be included in the project contract documents for the information of the contractor. Site Preparation and General Earthwork The building areas should Cie stripped of existing pavement. Other areas of existing pavement may be left in place for use in the proposed development. However, the thickness of the existing pavement section may need to be evaluated where heavy truck traffic is anticipated. Areas intended for development outside the existing pavement area should be stripped of all organic matter or any other deleterious material. Stripped materials should not be mixed with any materials to be used as structural fill. Existing utility pipes to bEl abandoned should be plugged or removed so that they do not provide a conduit for water and cause soil saturation and stability problems. To reduce the potential for differential settlement, the existing storm water line should be abandoned and removed in areas where the pipe will be less than two feet from the bottom of foundation elements. The footing and slab foundation soil should be prepared in accordance with the requirements of structural fill, defined later in this section. For foundations bearing on competent existing fill, the upper one foot of fill should be removed, the lower one foot compacted in place, and the upper one foot replaced in accordance with structural fill requirements. Laboratory tests indicate the moisture content of the existing fill is at or near its optimum moisture content, indicating the existing fill is currently in a compactible condition. These circumstances, however, may be different at the time of site preparation. Due to the presence of some silt in the existing fill, the soil may degrade if exposed to excessive moisture. Compaction and grading will be difficult if the soil moisture increases significantly above its optimum condition. If areas of the existing fill are exposed to moisture and cannot be adequately compacted, then the unsuitable soil should be removed and replaced with a compactible structural fill. The unsuitable soil should be removed to a depth at which competent soil is encountered. Typically, overexcavation depths of twelve (12) to eighteen (18) inches are required; however, an ECI representative should observe the overexcavation to evaluate the competence of the overexcavated surface. During dry weather, any non -organic compactible soil can be used to replace the overexcavated soil. Fill for use during wet weather should consist of a fairly well graded granular material having a maximum size of three inches and no more than five percent fines passing the No. 200 sieve based on the minus 3/4-inch fraction. Earth Consultants, Inc. GEOTECHNICAL ENGINEERING STUDY Adventure 95 August 30, 1995 E-6955 Page 5 Structural fill is defined as any compacted fill placed under buildings, roadways, slabs, pavements, or any other load -bearing areas. Structural fill under floor slabs and footings should be placed in horizontal lifts not exceeding twelve (12) inches in loose thickness and compacted to a minimum of 90 percent of its laboratory maximum dry density, except for the top twelve 0 2) inches which should be compacted to 95 percent. The maximum dry density should be determined in accordance with ASTM Test Designation D-1557-78 (Modified Proctor). The fill materials should be placed at or near the optimum moisture content. Fill under. pavements and walks should also be placed in horizontal lifts and compacted to 90 percent of maximum density except for the top twelve (12) inches which should be compacted to 95 percent of maximum density. Preload Program We estimate settlements induced by the proposed dock -high fill will range between approximately two inches and four inches. To help reduce post -construction settlements, we recommend the building area be subjected to a preload program. The dock -high fill should be placed to the finish floor elevation, and extend.a minimum of five feet beyond the building footprint. The side slopes of the fill should not be inclined steeper than 1:1 (Horizontal:Vertical). We estimate primary settlements induced by the preload will be complete in two to four weeks after the dock -high fill is placed. The actual surcharge time period will be dependent upon the rate and amount of settlement measured in the field. After completion of a successful preload program, we estimate post -construction differential settlements will be approximately one inch. If differential settlements of this magnitude cannot be tolerated, or if a shorter time period to induce settlements is required, additional fill should be placed on the prE.-load fill as a surcharge. Specific recommendations for a surcharge program will be provided upon request. In order to verify the magnitude of settlement, a monitoring program should be performed. The monitoring program should include installing settlement monitors on the existing site subgrade before any fill is placed, monitoring them through completion -of fill placement, and continuing until settlements cease or are considered within the buildings tolerable limits. More specific details of this program are presented below: • Settlement markers should be placed on the native subgrade of the building pad before fill is placed. At least four settlement markers should be installed within the building footprint. ECI can supply and install these markers. (A typical detail is provided on Plate 3.). • A baseline reading is obtained on each marker and is referenced to a temporary benchmark located on a feature that will be unaffected by the fill -induced settlements. • The fills are then placed. Settlement readings are taken at relatively short intervals during this process, since this phase generates relatively large and rapid settlement. Earth Consultants, Inc. GFOTECHNICAL ENGINEERING STUDY Adventure 95 August 30, 1995 E-6955 Page 6 • Once the fill operation is complete, readings are obtained on a periodic basis, typically weekly, until the settlement ceases or the remaining anticipated settlements are judged by the geotechnical engineer to be within the tolerable range. • Each set of settlement readings are plotted graphically against time to determine the magnitude and rate of settlement, and are matched against the predicted magnitudes and rates to verify the accuracy of earlier estimates and to make any appropriate modifications. ECI should be retained to acquire the settlement readings. If you prefer to use a surveyor to collect these readings, measurements should be provided to us as quickly after their acquisition as possible for plotting and interpretation. This will help avoid any misinterpretation or misunderstanding regarding the success of the preload program. In order to ensure the accuracy of the settlement readings, the settlement monitors must be maintained. In our experience, earthwork equipment (dozers and trucks) often demolish markers at a very high rate. This adds to the project costs in that they need to be replaced and it makes the information obtained less reliable. To avoid this, the project specifications should include a requirement that the earthwork contractor is required to immediately replace any damaged settlement marker and have the settlement readings re -obtained at his own cost. This requirement makes the earthwork contractor more conscious of the importance of the monitoring program and will aid in maintaining the integrity of the program. Foundations Assuming compliance with the recommendations outlined in the "Preload Program" and "Site Preparation and General Earthwork" sections of this report, it is our opinion the proposed building can be supported on a conventional spread and continuous footing foundation bearing on existing competent fill or newly placed structural fill. Exterior foundations elements should be placed a minimum depth of eighteen (18) inches below final exterior grade. Interior spread foundations can be placed at a minimum depth of twelve (12) inches below the top of slab, except in unheated areas, where interior foundation elements should be founded at a minimum depth of eighteen (18) inches. With foundation support obtained as described, for design, an allowable soil bearing capacity of two thousand five hundred (2,500) can be used. Continuous and individual spread footings should have minimum widths of eighteen (18) and twenty-four (24) inches, respectively. Loading of this magnitude would be provided with theoretical factor -of -safety in excess of three against actual shear failure. With structural loading as expected, total settlement in the range of one and one-half inches is anticipated with differential movement of about one inch. Most of the anticipated settlements should occur during construction as dead loads are applied. This is after successful completion of the preload program. For short-term dynamic loading conditions, a one-third increase in the above allowable bearing capacities can be used. Earth Consuttants, Inc. GEOTECHNICAL ENGINEERING STUDY Adventure 95 August 30, 1995 E-6955 Page 7 v The horizontal loads can be resisted by friction between the base of the foundation and the supporting soil and by passive soil pressure acting on the face of the buried portion of the foundation. For the latter, the foundation must be poured "neat" against the competent existing fill soils or backfilled with structural fill. For frictional capacity, a coefficient of 0.40 can be used. For passive earth pressure, the available resistance can be computed using an equivalent fluid pressure of three hundred (300) pcf. These lateral resistance values are allowable values, a factor -of -safety of 1.5 has been included. As movement of the foundation element is required to mobilize full passive resistance, the passive resistance should be neglected if such movement is not acceptable. All footing excavations should be observed by a representative of ECI, prior to placing forms or rebar, to verify that conditions are as anticipated in this report. Dock -High Retaining Walls, Dock -high retaining walls will be constructed along portions of the perimeter of the building. They should be designed to resist lateral earth pressures imposed by an equivalent fluid with a unit weight of thirty-five (35) pcf if they are allowed to rotate 0.002 times the height of the wall. If walls are prevented from rotating, we recommend that they be designed to resist lateral loads of fifty (50) pcf. These values are based on horizontal backfill and that surcharges due to hydrostatic pressures, traffic, structural loads or other surcharge loads will not act on the wall. If such surcharges are to apply, they should be added to the above design lateral pressure. Slab -on -Grade Floors Slab -on -grade floors may be supported on existing or recompacted competent fill, or on new structural fill. Any disturbed subgrade soil must either be recompacted or replaced with structural fill. Slab -on -grade floors should be designed..by the structural engineer based on the anticipated loading and the subgrade support characteristics. A modulus of vertical subgrade reaction of three hundred (300) pounds per cubic inch (pci) may be used for design. The slab should be provided with a minimum of four inches of free -draining sand or gravel. In areas where slab moisture is undesirable, a vapor barrier such as a 6-mil plastic membrane ■ may be placed beneath the slab. Two inches of damp sand may be placed over the membrane for protection during construction and to aid in curing of the concrete. Seismic Design Considerations The Puget Lowland is classified as a Seismic Zone 3 by the Uniform Building Code (UBC). The largest earthquakes in the Puget Lowland are widespread and have been subcrustal events, ranging in depth from thirty (30) to fifty-five (55) miles. Such deep events have exhibited no surface faulting. ,µ Earth Consultants. Inc. GE,OTECHNICAL ENGINEERING STUDY G. Adventure 95 E-6955 August 30, 1995 Page 8 Structures are subject to damage from earthquakes due to direct and indirect action. Direct action is represented by shaking. Indirect action is represented by foundation soil failures and is typified by ground failure or liquefaction. The UBC Earthquake regulations contain a static force procedure and a dynamic force procedure for design base shear calculations. Based on the encountered soil conditions, it is our opinion that a site coefficient of S3 = 1.5 should be used for the static force procedure as outlined in Section 1628 of the 1994 UBC. For the dynamic force procedure outlined in section 1929 of the 1994 UBC, the curve for soft to medium clay and sand (Soil Type 3) should be used for Figure 16-3, Normalized Response Spectra Shapes. Liquefaction is a phenomenon in which soils lose all shear strength for short periods of time during an earthquake. Groundshaking of sufficient duration results in the loss of grain to grain contact and rapid increase in pore water pressure, causing the soil to behave as a fluid. To have a potential for liquefaction, a soil must be cohesionless with a grain size distribution of a specified range (generally sands and silt); it must be loose to medium dense; it must be below the groundwater table; and it must be subject to sufficient magnitude and duration of groundshaking. The effects of liquefaction may be large total and/or differential settlement for structures founded in the liquefying soils. It is our opinion the potential for widespread liquefaction over the site during a seismic event is low. Isolated areas may be subject to liquefaction, however, the effect on the planned building is anticipated to be minimal provided the recommendations contained in this report are followed. We estimate liquefaction induced settlement would be in the range of the post constructed settlements discussed earlier. aExcavations and Slopes The following information is provided solely as a service to our client. Under no circumstances should this information be interpreted to mean that ECI is assuming responsibility for construction site safety or the Contractor's activities; such responsibility is not being implied and should not be inferred. In no case should excavation slopes be greater than the limits specified in local, state and Federal safety regulations. Based on the information obtained from our field exploration and laboratory testing, the site soils expected to be encountered in the upper six feet of the existing fill would be classified as Type B by OSHA, and as such, temporary cuts greater than four feet in height should Cie sloped at an inclination no steeper than 1 H:1 V. Excavations in the lower native deposits should be sloped at an inclination no steeper than 1.5H:1 V, meeting the requirements for a Type C soil. If slopes of these inclinations, or flatter, cannot be constructed, temporary shoring may be necessary. This shoring will help protect against slope or excavation collapse, and will provide protection to workmen in the excavation. If temporary shoring is required, we will be available to provide shoring design criteria, if requested. Earth Consultants, Inc. GEOTECHNICAL ENGINEERING STUDY Adventure 95 E-6955 August 30, 1995 Page 9 All permanent cut and fill slopes should be inclined no steeper than 2H:1 V. All cut slopes should be observed by ECI during excavation to verify that conditions are as anticipated. Supplementary recommendations can then be developed, if needed, to improve stability, including flattening of slopes or installation of surface or subsurface drains. In any case, water should not be allowed to flow uncontrolled over the top of any slopes. All permanently -exposed slopes should be seeded with an appropriate species of vegetation to reduce erosion and improve stability of the surficial layer of soil. Site Drainage The site must be graded such that surface water is directed off the site. Water must not be allowed to stand in any area where buildings, slabs or pavements are to be constructed. During construction, loose surfaces should be sealed at night by compacting the surface to reduce the potential for moisture infiltration into the soils. Final site grades must allow for drainage away from the building foundations. The ground should be sloped at a gradient of three percent for a distance of at least ten feet away from the buildings, except in paved areas, which can be sloped at a gradient of one percent. Perimeter footing drains should be installed around portions of the proposed warehouse not supported on dock high fill and having tile or carpet finishes that can be damaged by water infiltration. The footing drain should be installed at or just below the invert of the footing, with a gradient sufficient to initiate flow. A typical detail is provided on Plate 3. Under no circumstances should roof downspout drain lines be connected to the footing drain system. All roof downspouts must be separately tightlined to discharge. Cleanouts should be installed at strategic locations to allow for periodic maintenance of the footing drain and downspout tightline systems. Utility Support and Backfill Based on the soil conditions encountered, utilities located in the upper four feet of the existing fill should be supported adE:quately by the fill. However, moderate to heavy seepage may be encountered in utility trenches deeper than approximately five feet below the existing surface elevation. In the event that utilities are located deeper in the upper portions of the native soils, remedial measures may be necessary in order to provide adequate support for utilities. This can be accomplished by overexcavating the unsuitable soil and replacing it with a suitable pipe bedding material. Earth Consultants, Inc. GEOTECHNICAL ENGINEERING STUDY Adventure 95 E-6955 August 30, 1995 Page 10 Utility trench backfill is a major concern in reducing the potential for settlement along utility alignments, particularly in pavement areas. It is important that each section of utility line be adequately supported in the bedding material. The material should be hand tamped to ensure support is provided around the pipe haunches. Fill should be carefully placed and hand tamped to about twelve inches above the crown of the pipe before any heavy compaction equipment is brought into use. The remainder of the trench backfill should be placed in lifts having a loose thickness of less than twelve inches. A typical trench backfill section and compaction requirements for load supporting and non -load supporting areas is presented on Plate 4. Pavement Areas The adequacy of site pavements is related in part to the condition of the underlying subgrade. To provide a properly prepared subgrade for pavements, the subgrade should be treated and prepared as described in the "Site Preparation and General Earthwork" section of this report. This means at least the top twelve (12) inches of the subgrade should be compacted to 95 percent of the maximum dry density (per ASTM D-1557-78). It is possible that some localized areas of soft, wet or unstable subgrade may still exist after this process. Therefore, a greater thickness of structural fill or crushed rock may be needed to stabilize these localized areas. The following pavement section for lightly -loaded areas can be used: • Two inches of asphalt concrete (AC) over four inches of crushed rock base (CRB) material, or • Two inches of AC over three inches of asphalt treated base (ATB) material. Heavier truck -traffic areas will require thicker sections depending upon site usage, pavement life and site traffic. As a general rule, the following sections can be considered for truck - traffic areas: • Three inches of AC over six inches of CRB, or • Three inches of AC over four inches of ATB. These pavement thicknesses may be modified based on anticipated traffic loads and frequency. Asphalt concrete (AC), asphalt treated base (ATB), and crushed rock base (CRB) materials should conform to WSDOT specifications. All rock base should be compacted to at least 95 percent of the ASTM D-1557-78 laboratory test standard. Earth Consultants, Inc. GEOTECHNICAL ENGINEERING STUDY s Adventure 95 E-6955 August 30, 1995 Page 11 LIMITATIONS Our recommendations and conclusions are based on the site materials observed, selective laboratory testing and engineering analyses, the design information provided to us by the you, and our experience and engineering judgement. The conclusions and recommendations are professional opinions derived in a manner consistent with that level of care and skill ordinarily exercised by other members of the profession currently practicing under similar conditions in this area. No warranty is expressed or implied. The recommendations submitted in this report are based upon the data obtained from the borings. Soil and groundwater conditions between borings may vary from those encountered. The nature and extent of variations between our exploratory locations may not become evident until construction. If variations do appear, ECI should be requested to reevaluate the recommendations of this report and to modify or verify them in writing prior to proceeding with the construction. Additional Services ® As the engineer of record, ECI should be retained to perform a general review of the final design and specifications to verify that the earthwork and foundation recommendations have been properly interpreted and implemented in the design and in the construction specifications. ECI should also be retained to provide geotechnical services during construction. This is to observe compliance with the design concepts, specifications or recommendations and to allow design changes in the event subsurface conditions differ from those anticipated prior to the start of construction. We do not accept responsibility for the performance of the foundation or earthwork unless we are retained to review the construction drawings and specifications, and to provide construction observation and testing services. Earth Consultants, Inc. _ f71DENj :;: ^,] �1 JH o .� ST 1v r S RENTON V N 149TH (t\ =`l';VAIiK I ° `tis q�crpN. 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RIVERS+ $ 182N0 I Qi I O P Lc — LL S7 _ _ is :•:::': ' L _ — h=-�I� r S 45TH / / T- Z SPRINGBROOK �l — — I — �C O GREENBEL T P J ,�Q NTooD ��IBL : t 36 31 y� ���' m f + I a (P JQ J �,•,S 1W6 H ST OR DRC RKt1c ST �f�^ � LnT �I � Reference: dhv� King County / Map 41 By Thomas Brothers Maps Dated 1990 Vicinity Map Earth Consultants Inc. Pacific Rim Supply Ge°`°d"'icaIF,gtrweem Geol I ogtsm &ErMra`""""IlS6r"fism Renton, Washington Proi. No. 6997 Drwn. GLS Date Aug. '95 Checked RC Date 8/24/95 Plate 1 I SS2 —^— o- SS3 I ISS1 S.W. 41 st STREET LEGEND B-1 + Approximate Location of ECI Boring, Proj. No. E-6997, Aug. 1995 SS1 -o- Approximate Location of Soil Sample by Dames & Moore MW-1 -o- Approximate Location of Monitor Well by Dames & Moore S.W. 39th STREET W Z W Railroad Tracks Q Not -To -Scale Z O a Earth Consultants Inc. Boring Location Plan Pacific Rim _Supply G"ochn ml Englnmm Gedogs s En lmnmenrA sc k niksts Renton, Washington koPrj. No. 6997 Drwn. GLS Date Aug. '95 Checked RC Date 8/24/95 Plate 2 **************************************************************** City of Renton WA Receipt **************************************************************** Receipt Number: R9600540 Amount: 12,968.87 02/08/96 09:47 Payment Method: CHECK Notation: #6775PACRIMBLDG Init: TB ------------------------------------------------------ Permit: C950250 Type: ENG ENG Construction Per Parcel No: 125381-0050 Site Address: 825 SW 39TH ST Location: SW 39TH ST & RAYMOND AV Total Fees: 14,638.12 This Payment 12,968.87 Total ALL Pmts: 14,638.12 Balance: .00 **************************************************************** Account Code Description Amount 000.343.20.00.0000 Public Works Inspection 15.00 401.343.90.00.0003 Stormwater Insp Approval 1,042.88 421.388.10.00.0020 Spec Util Connect Sewer 11,059.62 401.343.90.00.0002 Sewer Inspection Approvl 62.12 401.322.10.00.0015 Sewer Permit 100.00 401.343.90.00.0001 Water Inspection Approvl 549.25 401.388.10.00.0013 Misc Water Installation 40.00 401.322.10.00.0020 Storm Water Permits ----------------------------------------------------- 100.00 **************************************************************** City of Renton WA Receipt Receipt Number: R9505400 Amount: 1,669.25 11/03/95 11:00 Payment Method: CHECK Notation: #25911MUELLER ---------------------------------------------------------------- Init: TB Permit: C950250 Type: ENG ENG Construction Per Location: SW 39TH ST & RAYMOND AV Total Fees: 1,669.25 This Payment 1,669.25 Total ALL Pmts: 1,669.25 Balance: .00 Account Code Description Amount 000.343.20.00.0000 Public Works Inspection 15.00 401.343.90.00.0003 Stormwater Insp Approval 1,042.88 401.343.90.00.0002 Sewer Inspection Approvl 62.12 401.343.90.00.0001 Water Inspection Approvl ---------------------------------------------------------------- 549.25 W 0 -P+ F --) � q (" FC m' 'OF PE WON EIVED V D 3 ISIG3- BUILDING DIVISION C'TY OF RENTON E' C E I V E u 3 �95 STORMWATER DRAINAGE FOR PAC -RIM BUILDING SUPPLY, INC. OFFICE/WAREHOUSE FACILITY RENTON, WASHINGTON Prepared for. SEPTEMBER 25, 1995 Lance Mueller & Associates Architects 130 Lakeside Seattle, WA 98122 CITY OF RENTON vpE C E I V ED OCT 1 1 1Q35 Engineering e Plariming BUILDING DIVISION Surveying Penhallegon Associates Consulting Engineers; Inc. WJ tES 8/30/ yG 1 750 SIXTH STREET KIRKLAND, WA 98033 (206) 827-2014 King County Building and Land Development Division TECHNICAL INFORMATION REPORT (TIR) WORKSHEET ProjectOwner _ Pac-Rim Building Supply, In Address Phone - ProjectEngineer Pete G. Lymberis, P.E. Company Penhallegon Associates. Inc. Address Phone 750 6th Street South - Kirkland, WA 98033 rwu�T AS%M@ ■A AqP■, Page 1 of 2 Project Name Office/Warehouse Facility_.-_ Location Township 23N Range 5E Section _ 25 Project Size AC 0.96± Upstream Drainage Basin Size AC 0.0 [] Subdivision (� DOF/G HPA Shoreline Management Short Subdivision 0 COE 404 O Rockery ®. Grading E- DOE Dam Safety Structural Vaults F] Commercial FEMA Floodplain Other 0 Other COE Wetlands HPA Community Green River Valley -. Drainage Basin Green River Drainage Basin _- F-1 River [=1 Stream ED Critical Stream Reach Depressions/Swales (� Lake E::] Steep Slopes __— E::] Lakeside/Erosion Hazard 0 Floodplain Wetlands Seeps/Springs 0 High Groundwater Table [] Groundwater Recharge L Other j Soil Type Slopes Erosion Potential Erosive Velocities NSA - -- -- 0-2% - - -- -- --� --- Note Existinn site is'asphalt parking lot with no -_exposed soi Additional Sheets Attatched King County Building and Land Development Division TECHNICAL INFORMATION REPORT (TIR) WORKSHEET REFERENCE Ch. 4 - Downstream Analysis Additional Sheets Attatched LIMITATION/SITE CONSTRAINT MINIMUM ESC REQUIREMENTS DURING CONSTRUCTION Sedimentation Facilities Stabilized Construction Entrance Perimeter Runoff Control Clearing and Grading Restrictions Cover Practices Construction Sequence Other Page 2 of 2 MINIMUM ESC REQUIREMENTS FOLLOWING CONSTRUCTION 0 Stabilize Exposed Surface 0 Remove and Restore Temporary ESC Facilities Clean and Remove All Silt and Debris 0 Ensure Operation of Permanent Facilities Flag Limits of NGPES a Other 0 Grass Lined Channel 0 Tank Infiltration Method of Analysis ® Pipe System 0 Vault 0 Depression 0 Open Channel 0 Energy Dissapator E] Flow Dispersal Compensation/Mitigation of Eliminated Site Storage =1 Dry Pond 0 Wetland 0 Waiver 0 Wet Pond 0 Stream 0 Regional Detention Brief Description of System Operation Runoff collected and detained through existing and proposed catch basins, pipes, and existing surface oond;nQ_ Facility Related Site Limitations E] Additional Sheets Attatched Reference Facility Lin -nation PART. 11.:.5TRUCTUHAL: AN ;;(May re.— Ire'special strudu PlaceCast in Vault Retaining Wall '• • Structural on -• Slope PORT 1A -'SIGNATURE OF P F�] Drainage Easement a Other E] Access Easement [� Native Growth Protection Easement (] Tract Other 1 or a civil engineer under my supervision have visited the site. Actual site conditions as observed were incorporated into this worksheet and the —attatchments. To the best of my knowledge the information provided here is accurate. Pac-Rim Office Supply, Inc. New Office/Warehouse Facility Drainage Report . September 25, 1996 Pace Job# 95589 Project Description: ■ The site of the proposed Pac-Rim office/warehouse facility is approximately 3.25 acres in size and is located in the southwest corner at the intersection of S.W. 39th Stree and Raymond Avenue in Renton Washington. The site is currently a parking lot and was constricted by the Boeing Company in late 1985. The site is flat with typical parking stalls and planters associated with parking lots. The north side of the site is bordered by S.W. 39th ' Street and Raymond Avenue on the east. The west and south side of the site is bordered by the Burlington Northern right-of-way. Access to the site is from the north and. east from S.W. 39th Street and Raymond Avenue respectively. ' Prior to the development of the site, the building pad will be preloaded o the proposed finish floor elevation of 22.00. Prior to preloading the building, a new stormm ater conveyance and ' detention system will be installed and the old one removed. The new st rm system will be required since the proposed building will be placed in the existing park ng lot over the existing storm system and will destroy the existing surface ponding detention sy item along with the pipes ' below grade. ' Proposed development of the site consists of an 18,000 square foot ware iouse facility and a two story, 2,500 square foot attached office building in the northeast corner of the existing parking lot. Minor grading will occur to achieve a smooth transition from the new budding to the existing asphalt. Most will be fine grading with asphalt and no major earthwork will be required for the ' construction of the site except as stated for the preload. a Site Drainage Features: Currently site runoff is controlled by the onsite storm and detention. sys em. The existing system consists of 12" and 15" diameter storm drain pipes and catch basins for, the conveyance of stormwater runoff. Detention for the site is contained in the same existing catch basins, storm pipes, and also provided by surface ponding. A plan of the original storm system design has been attached to this report for reference. Due to the location of the proposed building, a portion of the existing pipe storm system, four catch basins, and the flow control structure must be removed and relocated. Also, a portion of the surface ponding volume will also be eliminated. In order to provide an equal amount of detention volume that is being removed, a pipe detention system is proposed for this project. All volume lost due to the placement of the building will be replaced with pipes and storm structures for the proposed storm detention system. The control structure has also been relocated, however, the flow characteristics of the orifice and the elevation of the overflow have not been altered to recreate the similar hydraulic conditions that currently exist. The majority of the required detention volume will be provided by 36" diameter CMP pipe and 54" diameter catch basins. Pac-Rim Office Supply, Inc. ' New Office/Warehouse Facility Drainage Report September 25, 1996 Pace Job# 95589 Core and Special Requirements: Core Requirement #1: Discharge at the Natural Location - _ This project will discharge stormwater runoff in the same storm system as the existing system, and thereby satisfies this core requirement. Core Requirement #2: Off -Site Analysis - The proposed new impervious surface for this project is less than 5,000 square feet and therefore is exempt from this core requirement. Core Requirement #3: Runoff Control - ' The proposed new impervious surface for this project is less than 5,000 square feet and therefore is exempt from this core requirement. This project has an existing detention system that will ' be modified and is discussed within this report. Core Requirement #4: Conveyance System - The existing conveyance system will be modified and is discussed later in this report. Core Requirement #5: Erosion/Sedimentation Control Plan - See sheet Cl for the project erosion control plan. This project does not propose major earthwork excavation or fill except for the building preload. Erosion control for this project will mostly consist of perimeter control. Sedimentation ponds, swales, etc. will not be required for this project. Special Requirements: ' There are no Special Requirements that are applicable to this project. KJ Pac-Rim Office Supply, Inc. ' New Office/Warehouse Facility Drainage Report September 25, 1996 Pace Job# 95589 Conveyance and Detention System Modifications Calculations: As previously stated in this report, the existing conveyance and detention system for this site will be modified. Attached as part of this report are the original design plans and calculations for this ' project's existing storm system basin. All referrence toexisting catch basins in this report will be per the original design plans. The intent of the proposed storm detention system is to replace all storage volume removed without increasing the allowable. release rate of the site and maintaining the maximum parking lot ponding elevation of 17.70. According to the original design plans, existing catch basins #14, 15, 20, 21 and the control structure (CB#16) will be removed. Also, 322 lineal feet of 15" CMP and 89 lineal feet of 12" CMP will be removed. Following is a table that summarizes the total volume of detention that will be removed. Item Volume per Original Lot Design Calculations (cu. ft.) Surface Ponding Volume Per Original Design Calculations (cu. ft.) Total Volume (cu. ft.) Catch Basin # 14 11.6 68 79.6 Catch Basin # 15 11.6 668 679.6 Catch Basin # 20 11.6 776 787.6 Catch Basin # 21 11.6 473 484.6 Catch Basin # 16 (Control Structure) 71 71 322 LF of 15" CMP 396 396 89 LF of 12" CMP 70 70 Total 2568.4 cu.ft ' On the following page is a summary of the proposed storm detention system and a summary of volumes of the proposed structures and storm drain pipes. m m m m r m m m m m m m m m m m= m m PENHAI.LEGON ASSOCIATES CONSULTING ENGINEERS, INC. 9/23/95 STORAGE REQUIRED: 2568.4 cu ft STORAGE PROVIDED: 2584.1 cu ft NET DIFFERENCE: 15.7 cu ft DEPTH FROM OVERFLOW MANHOLE DIAMETER(in) AREA(sq ft) VOLUME(cu ft) TO INVERT(ft) CB #1 6.85 54.00 15.90 108.94 CB#2 6.27 60.00 19.63 123.11 CB#3 5.98 54.00 15.90 95.11 CB#4 5.37 54.00 15.90 85.41 CB#5 3.50 Type I 5.80 20.30 Subtotal 432.87 LENGTH OF PIPE (ft) PIPE DIAMETER(in) AREA(sq ft) VOLUME(cu ft) cb-cb 1-2 117 36 7.07 827.02 2-3 58 36 7.07 409.98 3-4 122 36 7.07 862.37 2-5 66 12 0.79 51.84 Subtotal 2,151.21 TOTAL VOLUME: 2,584.08 cu ft DETSTORGMS CORRUGATED METAL PIPE AND PIPE -ARCH ' DETENTION AND RECHARGE SYSTEMS . MAXIMUM VOLUMES (CUBIC FEET PER LINEAR FOOT) ' ROUND PIPE PIPE ARCH PIPE ARCH (CMP and (CMP Sizes) (Sttictorai Plate Pipe Sizes) Structural Plate Pipe Sizes) (1/2" Deep Corrugation) VdumA MIn. Cove Diameter Volume Min. Cover Shape* Volume Mtn. Corer Shape* (Inches) (Ft-3/Ft.) Height (Inches) (FL3/FL) Heigh (Feet4nedt") (FL3/FL) Heigh ' 12 .76 17 x 13 1.1 1 8-Inch Corder Radius (Ro) 15 1.22 21 x 15 1.0 6-t x 4-7 22 18 1.76 24 x 18 21 2.40 28 x 20 2.9 &9 x 4A 24 ' 33 x 24 4.5 x 4-11 28 24 .x 5- 29 4 30 ,9 7-0 7-0 42 x 29 8.6 12" 7-3x S+3 31 38 7.0 49 x 33 . 8.9 7-0 x 5-5 33 42 9.6 57 x 38 11.6 7-11 x 5-7 36 64 x 43 14.7 8.2 x 5-9 38 ,5544 159 tr 71x47 18.1 8.7 x 5.11. 41 e 43 60 23;j 83 x 57 26.0 9-140 x 8-3 446 18° 72 28.2 - %:ri 9.6 x 6-5 49 78 33.1 9-9 x 6-7 52 a4 3a.41a3 x 6-9 5S 90 44.1 t0-8 x 8-11 58 96 50.2 (1- Deep Corrugation) 10.11 x 74 61 igg 58.7 115 x 73 64 68 108 M•6 114 7o.e Shape* Volume Min. Cover 11-i x 77-7 5 ' 128 20 88.5 18' [Onches) (Ft.3/Ft.) Height 12-.6 x i-11 78 132 95.0 ` 12-8 x 8.1 82 38 103.8 i+ 60 x 48 , 5.6 j 12.10 x 8.4 85 ' 11 66 x 51 19.3 135 x 8-6 89 1 1 73 x 5S 23 2 13 11 x 8-7 83 156 132 12' 144 x 8 9 97 40 162 143 81 x 59 4 14.3 x 8-11 101 163 153 244 7 87 95 x 63 67 37. 14.10 x 9-1 105 174 165 103 x 71 42.4 1 15.4 x 93 109 ' ISO 178 I 112 x 75 48.0 18' 1" x 9.5 114 186 188 1 117 x 79 54• 1 S 8 x 9-7 118 a 192 201 28 x iS10 x 910 122 25 1 213 _ 137 x 87 07.4 24' xt I 30' 221004 2227 142 x 91 74.5 1 10-7 x 10-1 131 i 210 254 31-Inch Comer Radius (Ro) 222 268 •Pipe Arch shape dlmenslons shown are for Span and Rise respectively. 13 3 x 04 196 '+ 40 3� 14-0 x 9 8 106 14-5 x 9.10 10a 115 24 MINIMUM pERMISSAeL.E SPACING FOR MULTIPLE INSTALLATIONS ' PIPE PIPE -ARC H 155--141 x 100--4 124 15.7 x 10.8 129 �ETER 1 x N x I" x 11-0 143 ' 17-0 x 11-2 148 17-2 X 114 163 SPACI __ 17-5x 11-6 158 17-11 x 114 163 DIAMETER SPACING PIPE -ARCH SPAN SPACING 166--7 x 12-0 174 ,><r 184 x 12-2 1" x 12-4 1" x 12.6 170 185 191 UUpp to 24' 24- to 7r 1 r 1/2 Ula. of Pipe Up to 38' 3w to 108' 1 r 1/3 span Of Pipe -Arch 72* and larger 38• 108' to 189' 3W 194 x 12-8 190 i9-11 x 12-10 202 Spacings shown provide room for proper backfill tamping to enable the structure to develop 20.7 x 1310 21�4 adequate side supporL I ' Page 5 - Pac-Rim Office Supply, Inc. New Office/Warehouse Facility Drainage Report September 25, 1996 Pace Job# 95589 Size Orifice - According to the original design report of the existing parking lot, the maximum allowable release rate for this project's tributary basin is 0.34CFS. Since allowable outflow is less than 1CFS only one orifice will be required. Orifice Equation = Q=Ca(2gH)^.5 Qallowable — 0.34CFS H = 17.70(Prop. overflow elev.) - 10.85(Prop. inv. elev. @ control manhole). = 6.85feet C = 0.62 g = 32.2ft/s^2 a = Area of orifice - to be determined Qallowable = 0.34CFS = 0.62a(2*32.2*6.85)^0.5 Solving for a = 0.02611square feet = 3.76 square inches. d = Diameter of orifice = (4*a/n)^0.5 = (4*3.76/n)^.5 d = 2.188 inches = 2 3/16" Use sharp edged -shop drilled orifice with 2 3/16" diameter. Temporary Erosion/Sedimentation Control: All erosion/sedimentation control facilities can be seen on sheet C1. Perimeter control and interim CB protection will be the only erosion control required for this project. No other calculations or facilities are required or provided for this project. 5 Pac-Rim Office Supply, Inc. ' New Office/Warehouse Facility Drainage Report September 25, 1996 ' Pace Job# 95589 EXISTING PARKING LOT DESIGN CALCULATIONS Note: The attached calculations are only the relevant portion of the total calculations for the existing parking lot. This project only proposes to modify a small portion of the overall parking area. The drainage basin that this project lies within was termed Basin "B" of Parcel No. 2. The attached calculations only show values for this project's portion of the existing site. I . I COMPUTATION SHEET JOB NO. =� "off" �� DATE /y LZd SHEET_ OF ESM inC. JOB NAME Al: lz _ A CIVIL ENGINEERING. LAND SURVEY, AND PROJECT MANAGEMENT COMP. BY �� CHK. BY CONSULTING FIRM 451 Southwest 10th Street Suite 106 Renton, Washington 98055 CONTENTS F*A- (206)228-5628 J*i^zC.+.�. Op T- 7 Al 11 l�^ I• 2,0 2- L�� _ 'J•7� 1 COMPUTATION SHEET JOB NO. � :�C " C 1 ` �- _ DATE _ = = S SHEET _L� OF ESM inc. JOB NAME -� T• = - _ _ _�" ;—►�I : L'• r/ - J r A CIVIL ENGINEERING. LAND SURVEY. AND PROJECT MANAGEMENT COMP. BY (C I CHK. BY CONSULTING FIRM 451 Southwest loth Street Suite 106 /1 Renton. Washington 98055 CONTENTS (206) 228-5628 1 4a:r-. = 2 • I5 Al•I COMPUTATION SHEET JOB NO. 230- o 1- 5SJ DATE ' ,J it 3C— SHEET OF ESM inc. JOB NAME 7:—:1^ _, .� A CIVIL ENGINEERING. LAND SURVEY, AND PROTECT MANAGEMENT COMP. BY CHK. BY CONSULTING FIRM �+ 451 Southwest loth Street Suite 106 Renton, Washington 98055 CONTENTS n//14c (206)228.5628 COMPUTATION SHEET JOB NO. ? 3C- 2! - "2Z.2 DATE 14 SHEET OF ESM inc. JOB NAMES „T, . — {c �T •-;r, :aT 'A CIVIL ENGINEERING. LAND SURVEY. AND PROJECT MANAGEMENTCOMP. BY �"�.T CHK. BY CONSULTING FIRM 451 Southwest loth Street Suite 106 Renton, Washington 98055 CONTENTS (206) 228-5628 COMPUTATION SHEET JOB NO. , = - ] - -73 DATE % Z - S SHEET (15 OF JOB NAME ESM inC. TiL� �J `aLt C :� ' -= r;"1^ : <' ^•C- _� 'A CIVIL ENGINEERING. LAND SURVEY, AND PROJECT MANAGEMENT COMP. BY -1-- CHK. BY CONSULTING FIRM 'I 451 Southwest 10th Street Suite 106 Renton. Washington 98055 CONTENTS 1rLF IN A (206)228-5628 ZT VOI. • {�em/rD�c� B is ` Pt C = b Z3 CZ7VJ/ = 34-L L� _ 4 34 - Z c E7'r 14iNiN G� �Co t,c.cE R�Z�, 8 c g-s kr /s - c -- /¢= s. S n 57 IC Lcl�c�Tt.� = ISM 57 = - !, 4o c' v = 3.3 o I ow o. (17- 5 2 Z t = ¢cam m ' 4 �•cTL ', (BI- 2!14- N 1i 7 A TF DATE- ' COMPUTATION- SHEET JOB NO. 12- SHEET OF ESM inc. JOB NAME A CIVIL ENGINEERING, LAND SURVEY. AND PROJECT MANAGEMENT ' COMP. BY CHK. BY CONSULTING FIRM 451 Southwest 10th Street Suite 106 Renton, Washington 98055 CONTENTS (206) 228-5628 I I I n I I I 2 C �S7 NZ -77 Z,7 -2 L) v&LQC., j-, (-:n c- ;tw�TES - ------ -- ........... 14- V-7 77- J yPMi pi t,�` DEPARTMENT OF FISHERIES IYDRAULIC PROJECT APPROVAL R.C.W. 75.20.100 [41 August 28 198-6_- (ApphcaN Should ref-, In thle date. ill All cm—ponde.ce) PAGE 1 OF -- 1_ _ _ PAGES DEPARTMENT OF FISHERIES General Admin. Bldg. Olympia, Washington 98504 (206) 753-6650 L LA51 NAME FIRST 1°�e Rainier Fund, Incorporated I11 CONTACT PHONE(S) °I 643-1010 1 2 3 4 - -- --- ----- - -- Ii9I STREET On RURAL ROUTE IZ400 S.E. 38th Street L27 17 191 WRIA CITY -_ . ---- - STATE --------- ZIP A B c o B-08.0283 Bellevue Washington 98006 WATER TRIBUTARY TO _ _ �12� nnamed Tributary May Creek G F WQUARTER SECTION TOWNSHIP ,3 Eirn RANGE (E-W) COUNTY 11 LJ TYPE OF PROJECT 32 24N 5E King Storm Drain System 151 THIS PROJECT MAY BEGIN I61 AND RF COMPLETED BY Except as TIME LIMITATIONS: Immediately November 1, 1987 noted in Provision THIS APPROVAL IS TO BE AVAILABLE ON THE JOB SITE AT ALL TIMES AND ITS PROVISIONS FOLLOWED BY THE PERMIT - TEE AND OPERATOR PERFORMING THE WORK. The person(s) to whom this approval is issued may be held liable for any loss or damage to fish life or habitat which results from failure to comply with the provisions of this approval. Failure to comply with the provisions of this approval is a gross misdemeanor, possibly punishable by fine and/or imprisonment. The Department reserves the right, subject to the holders opportunity to a hearing to contest agency actions as provided by the Ad- ministrative Procedure Act, chapter 34.04 RCW, to make additional restrictions or conditions or revoke the approval when new informa- tion shows such action is necessary by the department for the protection of fish life. This department cannot be held liable for any property damage which might occur as a result of this project, except where damages are proximately caused by actions of the department. This approval pertains only to the provisions of the Fisheries and Game Codes. Additional authorization from other public agencies may be necessary for this project. 1. Work involving the stream along Lake Washington Boulevard shall not occur during the months of November and December 1986 or January and February 1987. 2. All open storm water conveyance systems shall be constructed as shown on plans11May Creek Officellon Pan Abode Site, dated December 1985. 3. All open storm water conveyance systems shall be planted with vegetation that will provide a filtering mechanism. 4. Every effort shall be exercised throughout all phases of this project to insure that silt laden water does not enter the flowing stream. SEPA: DNS, City of Renton, January 1986. Regional Habitat Manager: Joe Robel, telephone - 753-2980. Location: Between SR 405 and Lake Washington Blvd. north of May Creek. cc: Johns, Patrol Buchanan Robel 1^ DEPARTMENT OF FISHERIES//.L �� `jC�` �' (� �.c DIRECTOR FIS. HAB. MGMT 001-(Rev 2 84) 3 ESM, INC. 451 S.W. loth St., #106 RENTON, WA 98055 Phone 228.5628 To City of Renton 200 Mill Ave. So. Renton, WA HAND CARRIED L[EUTEL_ JCF MUSENUQIL DATE JOB NO. 1230-01-850 ATTENTION Don Monohan RE: S.W.-3qth St. Parking Lot WE ARE SENDING YOU p Attached ❑ Under separate cover via the following items: ❑ Shop drawings ❑ Prints ❑ Plans ❑ Samples ❑ Specifications ❑ Copy of letter ❑ Change order k-1. Original Wars COPIES DATE NO. DESCRIPTION IOLZU86 4 Sheets 1-4 of 14 SW 39th Street Parking Lot. THESE ARE TRANSMITTED as checked below: El"For approval ❑ Approved as submitted ❑ Resubmit copies for approval - ❑ For your use ❑ Approved as noted ❑ Submit copies for distribution ❑ As requested ❑ Returned for corrections ❑ Return corrected prints ❑ For review and comment ❑ ❑ FOR BIDS DUE 19 ❑ PRINTS .RETURNED AFTER LOAN TO US REMARKS Tf You have anY questions or comments,Tlease call _ COPY SIGNED: ROBERT J. BEALS PRODUCT 240.2 E'es Imo, Grgnn, Mm 01421. 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BY CONSULTING FIRM 451 Southwest 101h Street Suite 106 Renton, Washington 98055 CONTENTS /y//? e S (206) 228.5628 13 A ..............!......: _. ........- .. .. ...:.......: ..: _.:y. ............: J :...: io..:...:.. :...:. .... .. _ :.. ��. . ... . _ .:......................... s COMPUTATION SHEET k OB NO. �49 — 0.3 —960 DATE Z 3 - to SHEET �/2 OF ESM inc. JOB NAME �,1. I. 391, 5 P�.Ei/14 La ��1s6v. ZZ, A CIVIL ENGINEERING, LAND SURVEY, AND PROJECT MANAGEMENT COMP. BY r/ %3. CHK. BY CONSULTING FIRM �� / v��S 451 Southwest loth Street Suite 106 Renton, Washington 98055 CONTENTS (b� �nG!/I� �l (206)228-5628 ............ ..... . ......... .......................... .... .................... .....:................ ........ ...:.................... _ ..... :.... - .. . 6 7 y,. -- -- . :.........:... .... .... :................ ...,.......:....... ......: --- --- . COMPUTATION SHEET JOB NO. Z4/- 03DATE-�- B6 SHEET 3 OF 1 3 ESM inc. JOB NAME 511/ f5 91A ST' /00,11-'227a Ld I A CIVIL ENGINEERING, LAND SURVEY, AND PROJECT MANAGEMENT COMP. BY CHK. BY CONSULTING FIRM Po17�1/7a l /O /van Cfs 451 Southwest IOth Street Suite 106 Renton, Washington 98055 CONTENTS (� (206)228-5628 ..:. ....:... :....... 22-.-....,... : . ,6 ... . 758, l-.:.......... ........ . . a,/.56...09 ...:26?., o..:...:...........:. .... .. ............ ...y . ....:.........:..28...:.............6.4...;........ 3 S1.7,. Z .....- -2.73:, e...'.......... . ....... .... ?9. .. � ; 30.- ... . Ta fa ;, � 3 :...: voi�m� ...q. �� . sys ley.;; . of :.: ..::. . :...:.. �. .....:...:...............:....:...........:....:....... _........... .. -- -- - A Portion Of The S.E. 1/4 Of Sec. 25, Twp. 23 N., Rqe. 5 E., W.M. And A Portion Of The S.W. 1/4 Of Sec. 30, Twp. 23 N., Rqe. 4 E., WX CS T"wlt, _W "f /G Type II - 54 fs i►'/A►' SAwe wAov /y/pi/ Swerator SM 1N/W/ SA/. Sev Detoi/ Shf 4 '7 Ty sr a /i.A Rim = /6.5 �• �` /.f.:Sao- MIA, /-1%/*'si h 0 x SCALE : I" = 30' NOTES: CONTOUR INTERVAL = 21• Contractor to verify lnvwrt 91evrtIons DATUM: CITY OF RENTON and catch basin locations of existing storm drain systan prior to emstruct l on . Nat i f y Rn9 I moor of any d i screpanc i es. B.M. = Chiseled Square On S.W. Corner Of Conc. Base, Of Street Light Along The 2, See Sheet I .for Typical Dimension Details. East Side Of Lind Ave., 500" North Of Prop. R.F_.- /G.O " S.W. 39th St.R7.37, 30'„ 7.47,2/"0l El. = 16.78, City Of Renton, No. 1039.8.�3, /5"f6 S.W. 39th S T. COn/,'RCf 7- Erisf 5.L7. M!/ T.B.M. = So. Rim Of Mon. Case At Ren+ove F(I'st /S'f Stub /ifstd/ 30' Orirsway S�c/ion. • Ron�ovi Existir„9 Curb ,l Intersection Of Lind Ave. 8S.W. 39th St. ! /nsto✓/ /s"s c "� yip`. GYrf,1e+` GIs Req'o! El. = 16. 39 - co"?C V'r /4 e ,a Mar.f.. 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