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31_1601 Lind Ave TIR (SPR) (3-16-15)
ENGINEERING REPORT Technical Information Report (SPR) 1601 Lind Avenue SW Renton, WA PREPARED FOR: Unico Properties, Inc. 1215 4th Avenue Suite 600 Seattle, WA 98161 PREPARED THROUGH: HOK Canal House 3223 Grace Street NW Washington, DC 20007 PREPARED BY: COUGHLIN PORTER LUNDEEN 801 Second Avenue, Suite 900 Seattle, WA 98104 P 206.343.0460 CONTACT / Stephen Porter, P.E. COUGHLINPORTERLUNDEEN 1601 Lind Avenue SW i Renton, Washington TECHNICAL INFORMATION REPORT AND HYDROLOGIC ANALYSIS 1601 Lind Avenue SW Coughlin Porter Lundeen Project No. C140769-01 March 16, 2015 TABLE OF CONTENTS Section Page I. PROJECT OVERVIEW .................................................................................................................................................. 1 GENERAL DESCRIPTION ................................................................................................................................................... 1 EXISTING CONDITIONS ...................................................................................................................................................... 1 PROPOSED DRAINAGE SYSTEM ....................................................................................................................................... 1 II. CONDITIONS AND REQUIREMENTS SUMMARY ............................................................................................... 2 CITY OF RENTON AMENDMENTS TO THE KING COUNTY SURFACE WATER MANAGEMENT DESIGN MANUAL CORE REQUIREMENTS: ............................................................................................................................................................... 2 SPECIAL REQUIREMENTS: ................................................................................................................................................ 2 PROJECT SPECIFIC REQUIREMENTS: .............................................................................................................................. 2 III. OFF-SITE ANALYSIS .................................................................................................................................................. 3 TASK 1 – STUDY AREA DEFINITION AND MAPS .............................................................................................................. 3 TASK 2 - RESOURCE REVIEW .......................................................................................................................................... 3 TASK 3 - FIELD INSPECTION ............................................................................................................................................. 3 TASK 4 - DRAINAGE SYSTEM DESCRIPTION AND PROBLEM DESCRIPTIONS ................................................................ 3 UPSTREAM ANALYSIS ....................................................................................................................................................... 3 DOWNSTREAM ANALYSIS ................................................................................................................................................. 3 TASK 5 – MITIGATION OF EXISTING OR POTENTIAL PROBLEMS .................................................................................... 3 IV. FLOW CONTROL AND WATER QUALITY FACILITY ANALYSIS AND DESIGN ........................................ 4 EXISTING SITE HYDROLOGY (PART A) ............................................................................................................................ 4 DEVELOPED SITE HYDROLOGY (PART B) ....................................................................................................................... 4 PERFORMANCE STANDARDS AND FLOW CONTROL SYSTEM (PARTS C AND D) .......................................................... 4 WATER QUALITY SYSTEM (PART E) ................................................................................................................................ 4 V. CONVEYANCE SYSTEM ANALYSIS AND DESIGN ............................................................................................ 5 STANDARD REQUIREMENTS (BASED ON KCSWDM AND SAO): .................................................................................. 5 ON-SITE CONVEYANCE ..................................................................................................................................................... 5 VI. SPECIAL REPORTS AND STUDIES ....................................................................................................................... 6 VII. OTHER PERMITS ....................................................................................................................................................... 7 VIII. CSWPPP ANALYSIS AND DESIGN ...................................................................................................................... 8 STANDARD REQUIREMENTS ............................................................................................................................................. 8 IX. BOND QUANTITY, FACILITY SUMMARIES, AND DECLARATION OF COVENANT ................................. 9 X. OPERATION AND MAINTENANCE MANUAL .................................................................................................... 10 STANDARD MAINTENANCE ............................................................................................................................................. 10 COUGHLINPORTERLUNDEEN 1601 Lind Avenue SW ii Renton, Washington LIST OF FIGURES Figure 1 – TIR Worksheet Figure 2 – Parcel Conditions Figure 3 – Site Location Figure 4 – Proposed Conditions Figure 5 – Drainage Basin Map Figure 6 – Flow Control Map Figure 7 – King County iMAP - Floodplain Figure 8 – City of Renton Soil Survey Map Figure 9 – Drainage Complaints Map Figure 10 – Water Quality Treatment Calculations LIST OF TABLES Table 1 - Existing Site Conditions Area Breakdown ............................................................................................ 4 Table 2 - Developed Site Conditions Area Breakdown ....................................................................................... 4 COUGHLINPORTERLUNDEEN 1601 Lind Avenue SW 1 Renton, Washington I. PROJECT OVERVIEW General Description The following preliminary Technical Information Report (TIR) provides the technical information and design analysis required for developing the Drainage and Temporary Erosion and Sedimentation Control Plan (TESC) for the FAA Unico project. The stormwater design for the project was based on the requirements set forth in the City of Renton Amendments to the 2009 King County Surface Water Design Manual (KCSWDM) (See Figure 1 – Technical Information Report Worksheet) and the 2009 KCSWDM. The 1601 Lind Avenue SW project is located within the City of Renton, one block south of Interstate 405 (1- 405) and on block west of State Route 167 (SR-167). The site is bordered by SW 16th Street to the north, Lind Avenue SW to the east, Raymond Avenue SW to the west and its property line to the south. (See Figure 3 – Site Location). The site is in Section 19, Township 23 North, Range 5 East, Willamette Meridian. The site will occupy parcels 3340404006, 33404004, and 33404003 with an area of 230,430-SF. Overall, the project will include an expansion with a footprint of 19,736 square feet to the existing FAA Unico site, a new parking structure which will have a footprint of approximately 52,942 square feet, and general site improvements including landscaping, changes to the parking layout, and upgrading and rerouting utilities. The existing site consists of 3.10 acres of impervious area and 0.76 acres of pervious area. The proposed conditions will consist of approximately 2.91 acres of impervious area and 0.95 acres of pervious area. Soils for the area were mapped using the USDA Web Soil Survey maps (See Figure 8 – Soil Survey Map). Runoff from the site will be discharged to the City’s storm system in Raymond Avenue. Existing Conditions The existing site consists of the existing 5-story FAA building with a footprint of approximately 40,253 square feet, a day care building with a footprint of approximately 6,430 square feet, and the remainder of the site is comprised mostly of asphalt parking lots. See Table 1 for site surface cover information. The existing stormwater conditions consist of a system of catch basins which collect runoff and pipe it to an underground detention pipe system. Flows are released from a detention control manhole and are routed to a lift station which pumps into an oil/water separator. The flow from the oi/water separator is routed through a grass-lined swale and ultimately discharges to the existing storm main in Raymond Avenue. For storms beyond the 25-year storm, flows bypass the control structure and flow directly into the Raymond Avenue storm drain. Proposed Drainage System According to Table 1.1.2.A of the City of Renton Amendments to the King County Surface Water Manual (COR-SWM), this project meets the criteria for a Full Drainage Review, including flow control and water quality requirements. Since the project is within a basic water quality treatment basin, Basic water quality treatment for runoff from all new target pollution generating surfaces will be provided by a cartridge filter system before being discharged to Lake Washington. Conveyance for the site will be a combination of closed 8 to 48-inch (detention) pipes and sheet flow. The existing sheet flow and catch basin system will remain, two existing detention pipes will be relocated avoid the new parking structure. All conveyance on site will be designed according to Chapter 4 of the City of Renton Amendments to the KCSWDM. COUGHLINPORTERLUNDEEN 1601 Lind Avenue SW 2 Renton, Washington II. CONDITIONS AND REQUIREMENTS SUMMARY This section will address the requirements set forth by the Core and Special Requirements listed in Chapter 1 of the City of Renton’s Amendments to the King County Surface Water Design Manual. City of Renton Amendments to the King County Surface Water Management Design Manual Core Requirements: 1. Discharge at the Natural Location (1.2.1): The discharge location onsite will not change, runoff will ultimately discharge to Green River. 2. Off-site Analysis (1.2.2): Refer to Sections III and IV. A Level 1 downstream analysis has been performed 3. Flow Control (1.2.3.1): Refer to Section IV. Since the project follows the City of Renton’s 40/20 rule, flow control facilities only have to mitigate for added impervious surfaces. As the project is decreasing the impervious area, flow control will not be required. 4. Conveyance System (1.2.4): Refer to Section V. Closed pipe systems have been provided for on-site stormwater conveyance. 5. Erosion and Sedimentation Control (1.2.5): Refer to Section VIII. The project will construct a series of sediment controls to address the specific conditions at the site. 6. Maintenance and Operations (1.2.6): Refer to Section X. The proposed storm drainage system will be owned, operated and maintained by the owner. 7. Financial Guarantees and Liability (1.2.7): The owner and contractor will obtain all necessary permits and bonds prior to the beginning of construction. 8. Water Quality (1.2.8): Refer to Section IV.E. New pollution generating surfaces are being added to the site, therefore this area will be mitigated with a stormfilter cartridge basic water quality system. Special Requirements: Special Requirement #1. Other Adopted Area-Specific Requirements Section 1.3.1 · Critical Drainage Areas (CDAs): Not Applicable · Master Drainage Plans (MDPs): There are no known master drainage plans covering this project site. · Basin Plans (BPs): The project is located within Black River Drainage Basin. · Lake Management Plans(LMPs): Not Applicable · Shared Facility Drainage Plans(SFDPs): Not Applicable Special Requirement #2. Flood Hazard Area Delineation, Section 1.3.2: See Figure 7 for 100-yr flood zone. No work affecting the flood storage will take place within the 100-yr flood zone. Special Requirement #3. Flood Protection Facilities, Section 1.3.3: Not Applicable Special Requirement #4. Source Controls, Section 1.3.4: See attached Activity Worksheet and Required BMP’s. Special Requirement #5. Oil Control: Minimal traffic is anticipated in this area. No oil control is required. Project Specific Requirements: There are no additional requirements for this portion of the project. Design and construction will abide by requirements set forth in these documents and King County. COUGHLINPORTERLUNDEEN 1601 Lind Avenue SW 3 Renton, Washington III. OFF-SITE ANALYSIS Task 1 – Study Area Definition and Maps The Renton drainage basin map was used to verify that the site was fully in the Lower Cedar River drainage basin (See Figure 4 – Drainage Basin Map). Task 2 - Resource Review a) Adopted Basin Plans Black River Drainage Basin b) Floodplain/floodway (FEMA) Maps Located in Flood Zone X and Flood Zone AE (See Figure 7) c) Off-site Analysis Reports N/A d) Sensitive Areas Folio See Figures 7 – King County iMAP e) Drainage Complaints and Studies See Figure 9 f) Road Drainage Problems N/A g) King County Soils Survey: See Figure 8 – City of Renton Soil Survey Map h) Wetland Inventory Maps: No Wetlands i) Migrating Rivers Study N/A j) DOE’s Section 303d List of Polluted Waters N/A k) KC Designated Water Quality Problems No WQ Problems l) City of Renton critical maps: No Critical Areas Task 3 - Field Inspection Site visits have been made to gather information including an analysis of the discharge from the site. Please refer to Task 4, Downstream Analysis below for more information. Task 4 - Drainage System Description and Problem Descriptions Runoff from the site will be conveyed to an existing storm system that eventually discharges to Green River. The parking structure will be routed to cartridge filters before connecting into the existing storm system on site. Similarly, runoff from the building roof and surrounding hardscapes will be collected and routed to the same existing storm system. Upstream Analysis The site is within the Black River drainage basin. Existing conveyance pipes are routed through the site and discharge to a storm main in Raymond Avenue. This existing bypass pipe conveys runoff from the adjacent PSE property to the south. This pipe will be intercepted at the property line and rerouted along the perimeter of the proposed garage, discharging to the existing system in Raymond south of its previous discharge location. No other upstream, offsite stormwater flows through the site. Downstream Analysis The site discharges to a storm main in Raymond Avenue via existing pipe conveyance and eventually outfalls to Green River. No visible drainage problems were observed. Task 5 – Mitigation of Existing or Potential Problems There are no known problems drainage complaints downstream of the site (See Figure 9). No mitigation is proposed. COUGHLINPORTERLUNDEEN 1601 Lind Avenue SW 4 Renton, Washington IV. FLOW CONTROL AND WATER QUALITY FACILITY ANALYSIS AND DESIGN Existing Site Hydrology (Part A) The existing disturbed area totals 3.10 acres and consists of an existing asphalt/gravel parking lot and a grass field. The site generally slopes to the northwest with drainage described in Section III Downstream Analysis. These conditions are summarized in Table 1 below. Table 1 - Existing Site Conditions Area Breakdown Land Cover Area Description Impervious Area 3.10 acres Asphalt parking areas, roofs, and sidewalks Pervious& Landscape 0.76 acres Associated landscaping Total Disturbed Area 3.86 acres Total disturbed area Percentage of Impervious Area 80.5% Developed Site Hydrology (Part B) The developed site hydrology will decrease the amount of impervious area by approximately 0.19 acres. A summary of the basin information is shown in Table 2. Table 2 - Developed Site Conditions Area Breakdown Land Cover Area Description Impervious Area 2.91 acres Asphalt parking areas, roofs, and sidewalks Pervious& Landscape 0.95 acres Associated landscaping Total Project Area 3.86 acres Total site area Percentage of Impervious Area 75.3% Performance Standards and Flow Control System (Parts C and D) According to Section 1.2.3.1 (and the Flow Control Basin Map) of the City of Renton Amendments to the KCSWDM, this project is located within the Peak Flow Control area. However, since this project is decreasing the amount of impervious area, flow control is not required. The new structured parking garage will require the removal of some existing detention pipes so the volume displaced will be replaced and provided in new 48” diameter pipes located outside the footprint of the new garage. Water Quality System (Part E) Section 1.2.8.1(A) of the City of Renton Amendments to the KCSWDM outlines the specific land uses within Basic WQ Treatment areas which are subject to providing Enhanced Basic WA treatment. Being a commercial land use, the 1601 Lind Avenue SW project falls into the category of Enhanced Basic WQ Treatment. The existing water quality system will remain, and additional water quality will be added for the proposed parking structure and new parking surface south of the garage. Water quality for the parking structure will be provided by a StormFilter cartridge system As shown in Figure 4 – Proposed Conditions, the parking lot will be treated by an existing oil separator. The project proposes to reuse the existing system to provide basic treatment for the portion of the surface parking that is being repaved. COUGHLINPORTERLUNDEEN 1601 Lind Avenue SW 5 Renton, Washington The cartridge filter system was sized using the water quality design flow rate (60% of the 2-yr peak flow) of 0.099-cfs. Each cartridge has a 0.011-cfs treatment capacity, so 9 cartridges will be required. Calculations will be verified during actual site utility permit review, and quantity of cartridges may change. V. CONVEYANCE SYSTEM ANALYSIS AND DESIGN This section discusses the criteria that will be used to analyze and design the proposed storm conveyance system. Standard Requirements (based on KCSWDM and SAO): 1. Facilities must convey the 100-year flow without overtopping the crown of the roadway, flooding buildings, and if sheet flow occurs it must pass through a drainage easement. All stormwater conveyance will be designed such that the 100-year flow is conveyed without overtopping the crown of the roadway (or drive aisle) or flooding any building. 2. New pipe systems and culverts must convey the 25-year flow with at least 0.5 feet of freeboard. (1.2.4-1). The new pipe systems will be designed to convey the 25-year flow with at least 0.5 feet of freeboard. 3. Bridges must convey the 100-year flow and provide a minimum of two feet, varying up to six feet, of clearance based on 25% of the mean channel width. (1.2.4-2)(4.3.5-6). N/A. This project does not propose a bridge. 4. Drainage ditches must convey the 25-year flow with 0.5 feet of freeboard and the 100-year flow without overtopping. (1.2.4-2). N/A This project does not propose a drainage ditch. 5. Floodplain Crossings must not increase the base flood elevation by more than 0.01 feet [41(83.C)] and shall not reduce the flood storage volume [37(82.A)]. Piers shall not be constructed in the FEMA floodway. [41(83.F.1)]. There not be an increase of the base flood elevation, or a reduction storage volume. 6. Stream Crossings shall require a bridge for class 1 streams that does not disturb or banks. For type 2 and type 3 steams, open bottom culverts or other method may be used that will not harm the stream or inhibit fish passage. [60(95.B)]. There are no new stream (river) crossings associated with the construction of this project. 7. Discharge at natural location is required and must produce no significant impacts to the downstream property (1.2.1-1). The project will discharge to the existing storm system. On-site Conveyance Existing Conditions: Runoff from the existing site is generally collected into catch basins via sheet flow and is conveyed in pipes to the storm main in Raymond Avenue. The existing conveyance system includes 24” and 48” pipes which also provide designed flow control detention volume storage. Developed Storm system description: Runoff from the building roof will be collected into roof drains and routed to the existing system on site. Runoff from the parking garage will be collected into a roof drain and routed to a proposed stormfilter manhole prior to discharging to detention pipes and discharging to the existing system on site. All other site runoff will continue to be collected by catch basins and trench drains before being routed to the main in Raymond Avenue. COUGHLINPORTERLUNDEEN 1601 Lind Avenue SW 6 Renton, Washington VI. SPECIAL REPORTS AND STUDIES None at this time. COUGHLINPORTERLUNDEEN 1601 Lind Avenue SW 7 Renton, Washington VII. OTHER PERMITS This project will require building and demolition permits from the City of Renton and a CSWPPP. See Section 8 for the CSWPPP (not included at this time). The NPDES permit will be through the State Department of Ecology. COUGHLINPORTERLUNDEEN 1601 Lind Avenue SW 8 Renton, Washington VIII. CSWPPP ANALYSIS AND DESIGN This section lists the requirements that will be used when designing the TESC plan for this site. A copy of the Draft CSWPPP has not been included at this time. A draft CSWPPP will be provided before permit is issued. Standard Requirements Erosion/Sedimentation Plan shall include the following: 1. Facilities required include: Catch basin filter socks. (1.2.5-1). The project will provide sediment protection at existing and proposed catch basins. 2. Timing - For the period between November 1 through March 1 disturbed areas greater than 5,000 square feet left undisturbed for more than 12 hours must be covered with mulch, sodding, or plastic covering. A construction phasing plan shall be provided to ensure that erosion control measures are installed prior to clearing and grading. (1.2.5-1). The TESC plan will include provisions for disturbed areas to be covered in accordance with City of Renton requirements and that all TESC measures are in place before any construction activity occurs. 3. Planning - Plan shall limit tributary drainage to an area to be cleared and graded. Delineate dimension, stake and flag clearing limits (1.2.5-1). The clearing limits will be indicated on the TESC plan. 4. Revegetation - Revegetate areas to be cleared as soon as practicable after grading. (1.2.5-1). Notes addressing this item will be included on the TESC plan. COUGHLINPORTERLUNDEEN 1601 Lind Avenue SW 9 Renton, Washington IX. BOND QUANTITY, FACILITY SUMMARIES, AND DECLARATION OF COVENANT A Bond Quantity Worksheet is not included at this time. A Water Quality Facility Summary Sheet outlining the proposed water quality system will be submitted following approval of the plans. Any required Declarations of Covenant will be included prior to issuance of the permit. COUGHLINPORTERLUNDEEN 1601 Lind Avenue SW 10 Renton, Washington X. OPERATION AND MAINTENANCE MANUAL Standard Maintenance Per standards set forth in the King County Surface Water Design Manual, the owner will maintain facilities. Sections of the King County Storm Water Management Design Manual outlining the Operations and Maintenance of these facilities have been included in this section on the following pages. COUGHLINPORTERLUNDEEN 1601 Lind Avenue SW 11 Renton, Washington MAINTENANCE STANDARDS FOR PRIVATELY MAINTAINED DRAINAGE FACILITIES AT 1601 LIND AVENUE SW NO. 2 - CLOSED DETENTION SYSTEMS (PIPES) Maintenance Component Defect Conditions When Maintenance is Needed Results Expected When Maintenance is Performed Storage Area Plugged Air Vents One-half of the cross section of a vent is blocked at any point with debris and sediment Vents free of debris and sediment Debris and Sediment Accumulated sediment depth exceeds 10% of the diameter of the storage area for ½ length of storage vault or any point depth exceeds 15% of diameter. Example: 72-inch storage tank would require cleaning when sediment reaches depth of 7 inches for more than ½ length of tank. All sediment and debris removed from storage area. Manhole Cover Not in Place Cover is missing or only partially in place. Any open manhole requires maintenance. Manhole is closed. Locking Mechanism Not Working Mechanism cannot be opened by one maintenance person with proper tools. Bolts into frame have less than ½ inch of thread (may not apply to self-locking lids.) Mechanism opens with proper tools. Cover Difficult to Remove One maintenance person cannot remove lid after applying 80lbs of lift. Intent is to keep cover from sealing off access to maintenance. Cover can be removed and reinstalled by one maintenance person. Ladder Rungs Unsafe King County Safety Office and/or maintenance person judges that ladder is unsafe due to missing rungs, misalignment, rust, or cracks. Ladder meets design standards allows maintenance person safe access. Catch Basins See “Catch Basins” Standards No. 4 See “Catch Basins” Standards No. 4 COUGHLINPORTERLUNDEEN 1601 Lind Avenue SW 12 Renton, Washington NO. 4 - CATCH BASINS Maintenance Component Defect Conditions When Maintenance is Needed Results Expected When Maintenance is performed General Trash & Debris (Includes Sediment) Trash or debris of more than 1/2 cubic foot which is located immediately in front of the catch basin opening or is blocking capacity of the basin by more than 10% No Trash or debris located immediately in front of catch basin opening. Trash or debris (in the basin) that exceeds 1/3 the depth from the bottom of basin to invert the lowest pipe into or out of the basin. No trash or debris in the catch basin. Trash or debris in any inlet or outlet pipe blocking more than 1/3 of its height. Inlet and outlet pipes free of trash or debris. Dead animals or vegetation that could generate odors that could cause complaints or dangerous gases (e.g., methane). No dead animals or vegetation present within the catch basin. Deposits of garbage exceeding 1 cubic foot in volume No condition present which would attract or support the breeding of insects or rodents. Structure Damage to Frame and/or Top Slab Corner of frame extends more than 3/4 inch past curb face into the street (If applicable). Frame is even with curb. Top slab has holes larger than 2 square inches or cracks wider than 1/4 inch (intent is to make sure all material is running into basin). Top slab is free of holes and cracks. Frame not sitting flush on top slab, i.e., separation of more than 3/4 inch of the frame from the top slab. Frame is sitting flush on top slab. COUGHLINPORTERLUNDEEN 1601 Lind Avenue SW 13 Renton, Washington NO. 4 - CATCH BASINS (CONTINUED) Maintenance Components Defect Condition When Maintenance is Needed Results Expected When Maintenance is Performed. Cracks in Basin Walls/ Bottom Cracks wider than 1/2 inch and longer than 3 feet, any evidence of soil particles entering catch basin through cracks, or maintenance person judges that structure is unsound. Basin replaced or repaired to design standards. Cracks wider than 1/2 inch and longer than 1 foot at the joint of any inlet/ outlet pipe or any evidence of soil particles entering catch basin through cracks. No cracks more than 1/4 inch wide at the joint of inlet/outlet pipe. Sediment/ Misalignment Basin has settled more than 1 inch or has rotated more than 2 inches out of alignment. Basin replaced or repaired to design standards. Fire Hazard Presence of chemicals such as natural gas, oil and gasoline. No flammable chemicals present. Vegetation Vegetation growing across and blocking more than 10% of the basin opening. No vegetation blocking opening to basin. Vegetation growing in inlet/outlet pipe joints that is more than six inches tall and less than six inches apart. No vegetation or root growth present. Pollution Nonflammable chemicals of more than 1/2 cubic foot per three feet of basin length. No pollution present other than surface film. Catch Basin Cover Cover Not in Place Cover is missing or only partially in place. Any open catch basin requires maintenance. Catch basin cover is closed Locking Mechanism Not Working Mechanism cannot be opened by on maintenance person with proper tools. Bolts into frame have less than 1/2 inch of thread. Mechanism opens with proper tools. Cover Difficult to Remove One maintenance person cannot remove lid after applying 80 lbs. of lift; intent is keep cover from sealing off access to maintenance. Cover can be removed by one maintenance person. Ladder Ladder Rungs Unsafe Ladder is unsafe due to missing rungs, misalignment, rust, cracks, or sharp edges. Ladder meets design standards and allows maintenance person safe access. Metal Grates (If Applicable) Grate with opening wider than 7/8 inch. Grate opening meets design standards. COUGHLINPORTERLUNDEEN 1601 Lind Avenue SW 14 Renton, Washington Trash and Debris Trash and debris that is blocking more than 20% of grate surface. Grate free of trash and debris. Damaged or Missing. Grate missing or broken member(s) of the grate. Grate is in place and meets design standards. COUGHLINPORTERLUNDEEN 1601 Lind Avenue SW 15 Renton, Washington NO. 9 - CONVEYANCE SYSTEMS (PIPES & DITCHES) Maintenance Component Defect Conditions When Maintenance is Needed Results Expected When Maintenance is Performed Pipes Sediment & Debris Accumulated sediment that exceeds 20% of the diameter of the pipe. Pipe cleaned of all sediment and debris. Vegetation Vegetation that reduces free movement of water through pipes. All vegetation removed so water flows freely through pipes. Damaged Protective coating is damaged; rust is causing more than 50% deterioration to any part of pipe. Pipe repaired or replaced. Any dent that decreases the cross section area of pipe by more than 20%. Pipe repaired or replaced. Open Ditches Trash & Debris Trash and debris exceeds 1 cubic foot per 1,000 square feet of ditch and slopes. Trash and debris cleared from ditches. Sediment Accumulated sediment that exceeds 20 % of the design depth. Ditch cleaned/ flushed of all sediment and debris so that it matches design. Vegetation Vegetation that reduces free movement of water through ditches. Water flows freely through ditches. Erosion Damage to Slopes See “Rain gardens” Standard No. 1 See “Rain gardens” Standard No. 1 Rock Lining Out of Place or Missing (If Applicable). Maintenance person can see native soil beneath the rock lining. Replace rocks to design standards. Catch Basins See “Catch Basins: Standard No. 4 See “Catch Basins” Standard No. 4 Debris Barriers (e.g., Trash Rack) See “Debris Barriers” Standard No.5 See “Debris Barriers” Standard No. 5 COUGHLINPORTERLUNDEEN 1601 Lind Avenue SW 16 Renton, Washington NO. 10 - GROUNDS (LANDSCAPING) Maintenance Component Defect Conditions When Maintenance is Needed Results Expected When Maintenance is Performed General Weeds (Nonpoisonous ) Weeds growing in more than 20% of the landscaped area (trees and shrubs only). Weeds present in less than 5% of the landscaped area. Safety Hazard Any presence of poison ivy or other poisonous vegetation. No poisonous vegetation present in landscaped area. Trash or Litter Paper, cans, bottles, totaling more than 1 cubic foot within a landscaped area (trees and shrubs only) of 1,000 square feet. Area clear of litter. Trees and Shrubs Damaged Limbs or parts of trees or shrubs that are split or broken which affect more than 25% of the total foliage of the tree or shrub. Trees and shrubs with less than 5% of total foliage with split or broken limbs. Trees or shrubs that have been blown down or knocked over. Tree or shrub in place free of injury. Trees or shrubs which are not adequately supported or are leaning over, causing exposure of the roots. Tree or shrub in place and adequately supported; remove any dead or diseased trees. COUGHLINPORTERLUNDEEN 1601 Lind Avenue SW 17 Renton, Washington NO. 11 - ACCESS ROADS/ EASEMENTS Maintenance Component Defect Condition When Maintenance is Needed Results Expected When Maintenance is Performed General Trash and Debris Trash and debris exceeds 1 cubic foot per 1,000 square feet i.e., trash and debris would fill up one standards size garbage can. Roadway free of debris which could damage tires. Blocked Roadway Debris which could damage vehicle tires (glass or metal). Roadway free of debris which could damage tires. Any obstruction which reduces clearance above road surface to less than 14 feet. Roadway overhead clear to 14 feet high. Any obstruction restricting the access to a 10 to 12 foot width for a distance of more than 12 feet or any point restricting access to less than a 10 foot width. Obstruction removed to allow at least a 12 foot access. Road Surface Settlement, Potholes, Mush Spots, Ruts When any surface defect exceeds 6 inches in depth and 6 square feet in area. In general, any surface defect which hinders or prevents maintenance access. Road surface uniformly smooth with no evidence of settlement, potholes, mush spots, or ruts. Vegetation in Road Surface Weeds growing in the road surface that are more than 6 inches tall and less than 6 inches tall and less than 6 inches apart within a 400-square foot area. Road surface free of weeds taller than 2 inches. COUGHLINPORTERLUNDEEN 1601 Lind Avenue SW 18 Renton, Washington NO. 12- WATER QUALITY FACILITIES A.) Cartridge Filter Vault Maintenance Component Defect or Problem Condition When Maintenance is Needed Recommended Maintenance to Correct Problem Below Ground Vault Sediment Accumulation on Media. Sediment depth exceeds 0.25-inches. No sediment deposits which would impede permeability of the compost media. Sediment Accumulation in Vault Sediment depth exceeds 6-inches in first chamber. No sediment deposits in vault bottom of first chamber. Trash/ Debris Accumulation Trash and debris accumulated on compost filter bed. Trash and debris removed from the compost filter bed. Sediment in Drain Pipes/Clean- Outs When drain pipes, clean-outs, become full with sediment and/ or debris. Remove the accumulated material from the facilities. Below Ground Cartridge type Compost Media Drawdown of water through the media takes longer than 1 hour, and/ or overflow occurs frequently. Replace media cartridges. Short Circuiting Flows do not properly enter filter cartridges. Replace filter cartridges. Damaged Pipes Any part of the pipes that are crushed, damaged due to corrosion and/ or settlement. Pipe repaired and/ or replaced. Access Cover Damaged/ Not Working Cover cannot be opened, one person cannot open the cover, corrosion/ deformation of cover. Cover repaired to proper working specifications or replaced. Vault Structure Includes Cracks in Wall, Bottom, Damage to Frame and/ or Top Slab Cracks wider than 1/2-inch and any evidence of soil particles entering the structure through the cracks, or maintenance/ inspection personnel determines that the vault is not structurally sound. Vault replaced or repaired to design specifications. Cracks wider than 1/2-inch at the joint of any inlet/outlet pipe or any evidence of soil particles entering the vault through the walls. No cracks more than 1/4-inch wide at the joint of the inlet/ outlet pipe. Baffles Baffles corroding, cracking warping, and/ or showing signs of failure as determined by maintenance/ inspection person. Repair or replace baffles to specification. COUGHLINPORTERLUNDEEN 1601 Lind Avenue SW 19 Renton, Washington Access Ladder Damaged Ladder is corroded or deteriorated, not functioning properly, missing rungs, cracks, and misaligned. Ladder replaced or repaired and meets specifications, and is safe to use as determined by inspection personnel. King County Department of Development and Environmental Services TECHNICAL INFORMATION REPORT (TIR) WORKSHEET Part 1 PROJECT OWNER AND PROJECT ENGINEER Part 2 PROJECT LOCATION AND DESCRIPTION Project Owner: Unico Properties, Inc. Project Name: 1601 Lind Avenue Address: 1215 4th Avenue, Suite 600 Seattle, WA 98161 Location Phone: (253) 383-2201 Township: 23N Range: 5E Section: 19 Project Engineer: Bart Balko, P.E. Company: Coughlin Porter Lundeen Address/Phone: 801 Second Avenue, Ste 900 Seattle, WA 98104 (206) 343-0460 Part 3 TYPE OF PERMIT APPLICATION Part 4 OTHER REVIEWS AND PERMITS Subdivison Short Subdivision Grading Commercial Other: SPR DFW HPA Shoreline Management COE 404 Rockery DOE Dam Safety Structural Vaults FEMA Floodplain Other COE Wetlands Part 5 SITE COMMUNITY AND DRAINAGE BASIN Community: Green River Valley Drainage Basin: Black River Drainage Basin Part 6 SITE CHARACTERISTICS River Green Stream Critical Stream Reach Depressions/Swales Lake Floodplain AE,X Wetlands Seeps/Springs High Groundwater Table Groundwater Recharge Steep Slopes Other Part 7 SOILS Soil Type Slopes Erosion Potential Erosive Velcoties Very loose to medium dense, non-silty to silty Sand 0-4% Very soft to medium stiff and stiff Silt and Clay Soft to medium stiff and stiff Silt Additional Sheets Attached Part 8 DEVELOPMENT LIMITATIONS REFERENCE LIMITATION/SITE CONSTRAINT Ch.4 – Downstream Analysis Additional Sheets Attached Part 9 ESC REQUIREMENTS MINIMUM ESC REQUIREMENTS DURING CONSTRUCTION MINIMUM ESC REQUIREMENTS AFTER CONSTRUCTION Sedimentation Facilities Stabilized Construction Entrance Perimeter Runoff Control Clearing and Graing Restrictions Cover Practices Construction Sequence Other Stabilize Exposed Surface Remove and Restore Temporary ESC Facilities Clean and Remove All Silt and Debris Ensure Operation of Permanent Facilities Flag Limits of SAO and open space preservation areas Other Part 10 SURFACE WATER SYSTEM Grass Lined Channel Pipe System Open Channel Dry Pond Wet Pond Tank Vault Energy Dissapator Wetland Stream Infiltration Depression Flow Dispersal Waiver Regional Detention Method of Analysis Compensation/Mitigati on of Eliminated Site Storage Brief Description of System Operation The site will reuse the existing storm system. Facility Related Site Limitations Reference Facility Limitation Part 11 STRUCTURAL ANALYSIS Part 12 EASEMENTS/TRACTS Cast in Place Vault Retaining Wall Rockery > 4’ High Structural on Steep Slope Other Drainage Easement Access Easement Native Growth Protection Easement Tract Other Water, Electrical Part 13 SIGNATURE OF PROFESSIONAL ENGINEER I or a civil engineer under my supervision my supervision have visited the site. Actual site conditions as observed were incorporated into this worksheet and the attachments. To the best of my knowledge the information provided here is accurate. Signed/Date PORTER5647%674#.|%+8+.|5'+5/+%'0)+0''4+0)Project:Project No:Client:Checked By:Date:Project:Sheet:Designed By:Copyright 2014, COUGHLINPORTERLUNDEEN Inc.5'%10'|57+6'|5'#66.'9#|2 |( www.cplinc.comExisting ConditionsScale: 1" = 75' King County Districts and Development Conditions for parcel 3340404006 Parcel number 3340404006 Address 1601 LIND AVE SW 98055 Jurisdiction Renton Zipcode 98057 Kroll Map page 336 Thomas Guide page 656 Drainage Basin Black River Watershed Duwamish - Green River WRIA Duwamish-Green (9) PLSS SW - 19 - 23 - 5 Latitude 47.46594 Longitude -122.22543 Electoral Districts Voting district RNT 11-2582 King County Council district District 5, Dave Upthegrove (206) 477-1005 Congressional district 9 Legislative district 11 School district Renton #403 Seattle school board district does not apply (not in Seattle) District Court electoral district Southeast Fire district does not apply Water district does not apply Sewer district does not apply Water & Sewer district does not apply Parks & Recreation district does not apply Hospital district Public Hospital District No. 1 Rural library district Rural King County Library System Tribal Lands?No King County planning and critical areas designations King County zoning NA, check with jurisdiction Development conditions None Comprehensive Plan does not apply Urban Growth Area Urban Community Service Area does not apply Community Planning Area Green River Valley Coal mine hazards?None mapped Erosion hazards?None mapped Landslide hazards?None mapped Seismic hazards?None mapped Potential annexation area does not apply Rural town?No Water service planning area does not apply Roads MPS zone 116 Transportation Concurrency Management does not apply Forest Production district?No Agricultural Production district?No Critical aquifer recharge area?None mapped 100-year flood plain?None mapped Wetlands at this parcel?None mapped Within the Tacoma Smelter Plume? Non-Detect to 20.0 ppm Estimated Arsenic Concentration This report was generated on 1/2/2015 2:33:33 PM Contact us at giscenter@kingcounty.gov. © 2010 King County Page 1 of 1King County Districts and Development Conditions for parcel number 3340404006 1/2/2015http://www5.kingcounty.gov/KCGISReports/dd_report_print.aspx?PIN=3340404006 King County Districts and Development Conditions for parcel 3340404004 Parcel number 3340404004 Address 1650 RAYMOND AVE SW 98055 Jurisdiction Renton Zipcode 98057 Kroll Map page 336 Thomas Guide page 656 Drainage Basin Black River Watershed Duwamish - Green River WRIA Duwamish-Green (9) PLSS SW - 19 - 23 - 5 Latitude 47.46478 Longitude -122.2256 Electoral Districts Voting district RNT 11-2582 King County Council district District 5, Dave Upthegrove (206) 477-1005 Congressional district 9 Legislative district 11 School district Renton #403 Seattle school board district does not apply (not in Seattle) District Court electoral district Southeast Fire district does not apply Water district does not apply Sewer district does not apply Water & Sewer district does not apply Parks & Recreation district does not apply Hospital district Public Hospital District No. 1 Rural library district Rural King County Library System Tribal Lands?No King County planning and critical areas designations King County zoning NA, check with jurisdiction Development conditions None Comprehensive Plan does not apply Urban Growth Area Urban Community Service Area does not apply Community Planning Area Green River Valley Coal mine hazards?None mapped Erosion hazards?None mapped Landslide hazards?None mapped Seismic hazards?None mapped Potential annexation area does not apply Rural town?No Water service planning area does not apply Roads MPS zone 116 Transportation Concurrency Management does not apply Forest Production district?No Agricultural Production district?No Critical aquifer recharge area?None mapped 100-year flood plain?None mapped Wetlands at this parcel?None mapped Within the Tacoma Smelter Plume? Non-Detect to 20.0 ppm Estimated Arsenic Concentration This report was generated on 1/2/2015 2:35:45 PM Contact us at giscenter@kingcounty.gov. © 2010 King County Page 1 of 1King County Districts and Development Conditions for parcel number 3340404004 1/2/2015http://www5.kingcounty.gov/KCGISReports/dd_report_print.aspx?PIN=3340404004 King County Districts and Development Conditions for parcel 3340404003 Parcel number 3340404003 Address 1602 RAYMOND AVE SW 98055 Jurisdiction Renton Zipcode 98057 Kroll Map page 336 Thomas Guide page 656 Drainage Basin Black River Watershed Duwamish - Green River WRIA Duwamish-Green (9) PLSS SW - 19 - 23 - 5 Latitude 47.46531 Longitude -122.22657 Electoral Districts Voting district RNT 11-2582 King County Council district District 5, Dave Upthegrove (206) 477-1005 Congressional district 9 Legislative district 11 School district Renton #403 Seattle school board district does not apply (not in Seattle) District Court electoral district Southeast Fire district does not apply Water district does not apply Sewer district does not apply Water & Sewer district does not apply Parks & Recreation district does not apply Hospital district Public Hospital District No. 1 Rural library district Rural King County Library System Tribal Lands?No King County planning and critical areas designations King County zoning NA, check with jurisdiction Development conditions None Comprehensive Plan does not apply Urban Growth Area Urban Community Service Area does not apply Community Planning Area Green River Valley Coal mine hazards?None mapped Erosion hazards?None mapped Landslide hazards?None mapped Seismic hazards?None mapped Potential annexation area does not apply Rural town?No Water service planning area does not apply Roads MPS zone 116 Transportation Concurrency Management does not apply Forest Production district?No Agricultural Production district?No Critical aquifer recharge area?None mapped 100-year flood plain?None mapped Wetlands at this parcel?None mapped Within the Tacoma Smelter Plume? Non-Detect to 20.0 ppm Estimated Arsenic Concentration This report was generated on 1/2/2015 2:37:06 PM Contact us at giscenter@kingcounty.gov. © 2010 King County Page 1 of 1King County Districts and Development Conditions for parcel number 3340404003 1/2/2015http://www5.kingcounty.gov/KCGISReports/dd_report_print.aspx?PIN=3340404003 PORTER5647%674#.|%+8+.|5'+5/+%'0)+0''4+0)Project:Project No:Client:Checked By:Date:Project:Sheet:Designed By:Copyright 2014, COUGHLINPORTERLUNDEEN Inc.5'%10'|57+6'|5'#66.'9#|2 |( www.cplinc.comof PORTER5647%674#.|%+8+.|5'+5/+%'0)+0''4+0)Project:Project No:Client:Checked By:Date:Project:Sheet:Designed By:Copyright 2014, COUGHLINPORTERLUNDEEN Inc.5'%10'|57+6'|5'#66.'9#|2 |( www.cplinc.comProposed ConditionsScale: 1"= 75' BN Inc4th Rainier Lind3rd Cedar River 140thPetrovitskyI-405TalbotParkG r ad y I- 5 SR 167108th148thInterurban68thB e n s o n84thLogan 9 5t h 144thDuvall78th 16th WellsAndoverOakesdale27th SR 515Coal Cr eek128th 72nd43rd MercerWest Valley8th May Valley C arr116th 79th 76thPuget6th 164thRenton Issaquah 134th KirklandFairwood Renton Maple ValleyMonroe Southcenter132nd 8 0 th 204th 41st East Valley34th 8 9th Langston 5th 200thUnionWilliamsBeacon 154thHoquiamMaple Valley57th9th 30th Forest JonesSeward ParkNewcastle Aberdeen184thBangor 88th 169th SR 900194th CornellHarringtonHardieValleyPelly56th 58th183rd121st 161st62nd168th149th64th Parkside96th63rdGarden186th Strander 87th19th Mill Sunset 176th59thPedestrian156th1 2 th 21st 70th 175thLincoln125th135th Leo 61st31st 155th92nd Dixon 118th24th81st Renton133rd 2nd 166th15th Lakemont160th 1 0t h 1 4t h Avon Island CrestTukwilaMa ule Newcastle Golf Club 171stEdmonds39th 14 1s t Martin L King Jr Taft 29th Blaine19 2 nd 180th FieldTobin Lakeridge Sidney 114th 208th 177th1 96 th174th106th53rd38th93rd32nd 83rd L ak e Y o u n g s TrailShattuck 142nd 82nd 136thCrestwoodAccess112th Licorice 143rd23rd Soos Creek WoodsideBronsonHolly 131stNorfolk 138th 104th52ndIndex 159th55thPerimeter 105th199th 178th 65th 66th 71st Airport BurnettRoyal Hills123rd126thOlympiaMonster 75th Ho u s erWoodley 190th I sl and7th 28th 167th35th Rosario8 5 th 1st 33rd 91st IndustryFir Macadam60thSu n n y c r e s t AnacortesLynnwoodMinkler Rustic103rd98thLak e1 7 3r d A c c e s s R d w y LyonsFrager181st22nd 130th 145thRi ver si de158th111thSperryTaylor 102nd 40th Pasco151s t 198th 179thDavisBeacon Coal Mine 201st Baker Ryan Nile110t hG re e n R iv e r 69th124thOthello MapleAubur n188th 170th137thWabash Avalon 129t hAWest Lake Desire Pierce54th Klickitat 193rd Lake Youngs Service 73rd R ailroad 1 3th 195thMorris139th109th36th122ndPrivateBoeing 117t h120t h157th47thTodd 25th Myrtle Ferndale MainFletcher Juniper Luther 113th20th 209th163rd77thLake WashingtonPowellCedar 1 4 6 th 150th 182nd172ndThomasHillside Pilgrim High17thWaters 99thHazelwood42nd OlympicEast Lake DesireShelt onKenyon 206th Triland 1 0 0th VashonStevens97th187th OrcasOakOld Petrovitsky 119th 147thRolling HillsLake YoungsRussell6th pl 11th Hazel Windsor45th 165thWallace 202nd 48th 152nd37th JeffersonPine26th 127th Victoria 11 5th67th 191st Camas 185th 94thLaurel GlenwoodJericho107thRose Eden 90th Costco WillowBrighton NachesCapri203rd 18th Upland ChristensenSunwoodCedar RidgeHouser Way BypassM o nterey Kent BoeingRipleyRenton TC86th Eagle Ridge44th Ilwaco212thKennewick50thSeneca County Road 66 Meadow GrantLongacres153rd Lima Arrowsmith DaytonQuinceyMidland Ge mMountain View46th 74th 101st Segale Park B189th WhitmanPrentice 162ndF o u n ta in Center Point207th Warsaw Treck ElmaQueenPark Access S h o re Renton Dist CtChelanLewis 855th Oaksdale197th Gazelle Augusta 136 Talbot CrestKitsapUn n a me d Boei ng Ren t o nNel sonGe n e Co ulo n Par k 4 9 t h Ridgecrest Victor Park ViewRedmondMosesTacomaHolyokeRoxbury Smit he rs Nels BerglundEvergreen Lake View Raymond Riverview Park BremertonGrahamSouthcenter Mall Whitworth Eastwood Cooper Berkshire AptWestwood Duncan Kentridge HS Corporate 95th 140th 120th 150th1st 119th3rd 139th 7 7 th 71st 184th 1 8 th 144th Lincoln1 8 1 s t118th145thVashonAccess143rd139th65th 182nd 114th61st116th 148th64th11th Ki rkl and10th 147thHoquiam70th105th121st I-584th61stAccess142ndPrivate 172nd137th173rd140th 134th112th 166t h1 2 4th 8th Morris86thPri vat eCamas124th 74th 105th74th 142nd 192nd 167th 146th126th 155th 1 6 2nd AccessWilliams 184th3rd 8 th 178thMonterey81st 208th 74th 184th182nd 166thDayton 193rd127th 177thCamas129th 155th59th131st 130th 54th 88th 4 th 69th 18th 1st Private 152nd170th 5th 76th Access102nd70t h77th92nd 126th 161st105th128th175th 187th 112thAccess115th 102nd 162nd57th57th9th 170th79thQueen6th83rd 193rd 154th PrivateRedmond35th 116th169th103rd154thMeadow23rd130 t h 181stPierce133rd121st 105th144th86th 10th 2 2 n d 6 7 th 141st140th71st3rd 173rd 116th 199th 113th 184th199th 137th71stAnacortes 104t hHarrington1st132nd2nd 151st139thPrivate 81st58th206th Glenwood80th114th147th177th Burnett117thPedestrian Private Minkler 1 04 th 140th7th 110th2nd 135th 186th 94t hPrivate165th Access73rd61st Shattuck1 4 3 r d135th 1 8 0t h 101st68th152nd 175th147t hPed e stria n 196th Access4th WellsMain9th 100th 98thP riva te138th 168th 4th 124th1 71 s t106th2 3 rd 10th 77th141st 37th 65th 170th Private146th7th 138th209th 128th119th4th 113th184th I-5 173rd 202nd PrivatePrivate75th 127t hGreen River 123rd 161st143rd 128th18th 3rd72nd Pasco83rd64th1 5 7thPrivateBurnett130th 136th 1st Private160th165th130th92nd 165th168th 121stLake Youngs Trail151st 165thPrivate 179th135t h118th145th 198thI-5164th121stPrivate175th 3rd 8th Pelly78thHouser26th 178thI nd e x Jones150thPrivate 117th 141st70th185th21st 106th 136th 113th111th149th 169th120th84th176th 191st 5th 158thPrivate 169th126th 143rd 109th170th134th 5th120th I-5 192ndBlaine 3rd200th 160th200th 134th 78th69th5thLind12th 202nd 206th Private 62nd17th92nd 124th132ndRaymond151st103rd 66th 146th70th 184th 156th1st 15 0 th 87th 3rd 177th102ndAccess Priv at e 157th Private 8th 32nd Green River 171st181st 125th174th57th141stP riv a teDayton112th 189th 133rd 134th 175th 21st 71st Private72nd160th3rd 119th 77th27th119th 204th 126th 3 rd Access 118th141st 6th 4th 23rd 123rdLind190th 4 th Access 87th SR 51583rd1st 198th 164th 7th 7th143rd75th 18thSR 515Access 135t h150th130th52nd68thPrivate 6th 119th Cedar6th 129thStevens143rd9th 29th 86th Jones99th 202nd 146thJefferson2nd 144th Index1 5 7 th 172nd 2nd 12 0t h78th160th Private124th 1 6th 180th122nd 70thPrivate 76th 185th Ken t Boeing Morris5t h 141st 169th161st119th 21st A cc ess Access36th 111th4th77th U n n a me d 1 4 3 r d 20th 66th149th56th1 9 1 s t Private AccessPrivate 43rd 160thPierce156th129th Interurban179th 169th17 3rd 1st 15th 124th67th 156th1 1 8t h121stElma71st114th 24th 90th121st131st74th 68th 28th 32nd 154th180th 130th 181st 185th 156thPrivate71st 157th170th 98 th Private 142nd20 4th 165th114th 17th Private105th4th 134th 182nd 120th Jones126th21st Pedestrian181st188th 1 8 5 th20thPowell 183rd178th 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124th 146thBenson180th86th Private 158th 184th 1 28 th 133rd194th I n de xLyons6th 168th132nd149th 110t h80 th 148th190th 112th Access Williams178th 6 6 th 126th74th189th 106th66th96th136th164th78th 145th 1 9 6 thPrivate171st 145thAccess 190th 75th143r d78th 127thHigh144th Private165th 188th 29th 8th80th 174th72nd 2nd 37th56th 111th164th68thPark133rd150th23rd Private 77th 126th 184th 133rd 117th10th Access 148th184thLake9th 192nd 120thRyan Access 164th132nd 85th 122nd120th Olympia5th 125th Smithers36th 2nd ThomasMont erey175th 72nd152ndMill 171st 65th 144thLangston 87th200th 117th 13 1s t 160th 67th 5th 37th 66th 131st 13 th Blaine43rd 167th AccessAccess May Valley56th 82ndPrivate 142nd 120th 1st 20th 194th 4th PrivateAccess30th 16th 172nd 137th 7th 182nd Private145th 190th 92nd85th76th 131st 190th 125th7th 199th80th135th 78thHazelwood Davis82nd164th 179th 4th 76th 126thDayton120th 118th1 49th 166th154th172nd 6 8th 69th40th 146t h115th82nd184th116th75th123r d5th 91st Private3rd AccessIndexLake96th 159th 196th 156th1 3 6th 159thPrivate132nd158th76th32nd 109th81st 117th98th 180th 25th 160t h2ndMill 128t h110th 80th110th 162nd 14 2n d Private56th24th 172nd158th140th 167th Acce ss 193rd Ch ela n 203rdAccess 163rd 1st Pedestrian 162nd 169th82nd 158thHouser186th 57th 201st 65th 196th 7th Access114th204th 22nd Access1 0 th Private RentonPark18th57th85th10th84th 23rd55th 158t hShattuck160thGrant5th Jo ne s 120th4th 9th 143rd98th113th77th6 th 132nd66th 61st124th201stAccess 132nd A c c e s s Access108thPrivate 166th 184th I-4 0 5 198th 2 n d 89th158th76th54th81st126th155th 136th64th Access 116th19th 58th160th 76th 160thAccess166th157thTacomaJonesAccess 3rd 108th Mapl e2 1 s t7th 126th167th 6th 10th Private5th 8th 71st 26th Private 194th 144thPrivate 129th Pri vate8 thGa r de n20th Access128th62nd82nd 185th 6th 12th 143rd 114th CedarPrivate71st116th62nd3rd 128th59th7th Access A cc ess Private120th 139th 92nd174thPrivate96th14th Cedar17 2nd 199th56th138th66th 164th170thSunset 130th7th 168th 9th 10th 18 2n d 157th Access 118th 3rd 176th 96th182nd 25th 138thAccess 100th 187th 24th 16th 149th 123rd 1 5 9 th May Creek Coal Creek Unnamed Ma d se n C r e e k Springbrook CreekCoal Creek Tributary UnnamedU n n a m e d Coal CreekUnnamedUnnamedUnnamed UnnamedUnnamedU n n a me dUnnamedKing County Kent Tukwila Newcastle Seattle Bellevue King County Mercer Island King County King County SeaTac King County King County King County King County Kent Renton City Limits Potential Annexation Area Basins Black River Duamish Lake Washington East Lake Washington West Lower Cedar River May Creek Soos Creek ´ Surface Water UtilityComprehensive PlanPrinted 10/16/2009 Basin Locations 0 10.5 Miles iMAP The information included on this map has been compiled by King County staff from a variety of sources and is subject to change without notice. King County makes no representations or warranties, express or implied, as to accuracy, completeness, timeliness, or rights to the use of such information. This document is not intended for use as a survey product. King County shall not be liable for any general, special, indirect, incidental, or consequential damages including, but not limited to, lost revenues or lost profits resulting from the use or misuse of the information contained on this map. Any sale of this map or information on this map is prohibited except by written permission of King County. Date: 10/10/2013 Source: King County iMAP - Hydrographic Information (http://www.metrokc.gov/GIS/iMAP) 6RLO0DS².LQJ&RXQW\$UHD:DVKLQJWRQ )$$8QLFR6RLOV0DS 1DWXUDO5HVRXUFHV&RQVHUYDWLRQ6HUYLFH:HE6RLO6XUYH\1DWLRQDO&RRSHUDWLYH6RLO6XUYH\3DJHRI 1 : 1 : 1 : 1 :10DSSURMHFWLRQ :HE0HUFDWRU&RUQHUFRRUGLQDWHV :*6(GJHWLFV 870=RQH1:*6 )HHW 0HWHUV0DS6FDOH LISULQWHGRQ$ODQGVFDSH [ VKHHW 0$3/(*(1'0$3,1)250$7,21$UHDRI,QWHUHVW $2, $UHDRI,QWHUHVW $2, 6RLOV6RLO0DS8QLW3RO\JRQV6RLO0DS8QLW/LQHV6RLO0DS8QLW3RLQWV6SHFLDO3RLQW)HDWXUHV%ORZRXW%RUURZ3LW&OD\6SRW&ORVHG'HSUHVVLRQ*UDYHO3LW*UDYHOO\6SRW/DQGILOO/DYD)ORZ0DUVKRUVZDPS0LQHRU4XDUU\0LVFHOODQHRXV:DWHU3HUHQQLDO:DWHU5RFN2XWFURS6DOLQH6SRW6DQG\6SRW6HYHUHO\(URGHG6SRW6LQNKROH6OLGHRU6OLS6RGLF6SRW6SRLO$UHD6WRQ\6SRW9HU\6WRQ\6SRW:HW6SRW2WKHU6SHFLDO/LQH)HDWXUHV:DWHU)HDWXUHV6WUHDPVDQG&DQDOV7UDQVSRUWDWLRQ5DLOV,QWHUVWDWH+LJKZD\V865RXWHV0DMRU5RDGV/RFDO5RDGV%DFNJURXQG$HULDO3KRWRJUDSK\7KHVRLOVXUYH\VWKDWFRPSULVH\RXU$2,ZHUHPDSSHGDW :DUQLQJ 6RLO0DSPD\QRWEHYDOLGDWWKLVVFDOH(QODUJHPHQWRIPDSVEH\RQGWKHVFDOHRIPDSSLQJFDQFDXVHPLVXQGHUVWDQGLQJRIWKHGHWDLORIPDSSLQJDQGDFFXUDF\RIVRLOOLQHSODFHPHQW7KHPDSVGRQRWVKRZWKHVPDOODUHDVRIFRQWUDVWLQJVRLOVWKDWFRXOGKDYHEHHQVKRZQDWDPRUHGHWDLOHGVFDOH3OHDVHUHO\RQWKHEDUVFDOHRQHDFKPDSVKHHWIRUPDSPHDVXUHPHQWV6RXUFHRI0DS 1DWXUDO5HVRXUFHV&RQVHUYDWLRQ6HUYLFH:HE6RLO6XUYH\85/ KWWS ZHEVRLOVXUYH\QUFVXVGDJRY&RRUGLQDWH6\VWHP :HE0HUFDWRU (36* 0DSVIURPWKH:HE6RLO6XUYH\DUHEDVHGRQWKH:HE0HUFDWRUSURMHFWLRQZKLFKSUHVHUYHVGLUHFWLRQDQGVKDSHEXWGLVWRUWVGLVWDQFHDQGDUHD$SURMHFWLRQWKDWSUHVHUYHVDUHDVXFKDVWKH$OEHUVHTXDODUHDFRQLFSURMHFWLRQVKRXOGEHXVHGLIPRUHDFFXUDWHFDOFXODWLRQVRIGLVWDQFHRUDUHDDUHUHTXLUHG7KLVSURGXFWLVJHQHUDWHGIURPWKH86'$15&6FHUWLILHGGDWDDVRIWKHYHUVLRQGDWH V OLVWHGEHORZ6RLO6XUYH\$UHD .LQJ&RXQW\$UHD:DVKLQJWRQ6XUYH\$UHD'DWD 9HUVLRQ6HS6RLOPDSXQLWVDUHODEHOHG DVVSDFHDOORZV IRUPDSVFDOHV RUODUJHU'DWH V DHULDOLPDJHVZHUHSKRWRJUDSKHG $XJ²2FW7KHRUWKRSKRWRRURWKHUEDVHPDSRQZKLFKWKHVRLOOLQHVZHUHFRPSLOHGDQGGLJLWL]HGSUREDEO\GLIIHUVIURPWKHEDFNJURXQGLPDJHU\GLVSOD\HGRQWKHVHPDSV$VDUHVXOWVRPHPLQRUVKLIWLQJRIPDSXQLWERXQGDULHVPD\EHHYLGHQW6RLO0DS².LQJ&RXQW\$UHD:DVKLQJWRQ )$$8QLFR6RLOV0DS 1DWXUDO5HVRXUFHV&RQVHUYDWLRQ6HUYLFH:HE6RLO6XUYH\1DWLRQDO&RRSHUDWLYH6RLO6XUYH\3DJHRI 0DS8QLW/HJHQG .LQJ&RXQW\$UHD:DVKLQJWRQ :$ 0DS8QLW6\PERO 0DS8QLW1DPH $FUHVLQ$2,3HUFHQWRI$2, 3X 3XJHWVLOW\FOD\ORDP 8U 8UEDQODQG 7RWDOVIRU$UHDRI,QWHUHVW 6RLO0DS².LQJ&RXQW\$UHD:DVKLQJWRQ )$$8QLFR6RLOV0DS 1DWXUDO5HVRXUFHV&RQVHUYDWLRQ6HUYLFH :HE6RLO6XUYH\1DWLRQDO&RRSHUDWLYH6RLO6XUYH\3DJHRI iMAP The information included on this map has been compiled by King County staff from a variety of sources and is subject to change without notice. King County makes no representations or warranties, express or implied, as to accuracy, completeness, timeliness, or rights to the use of such information. This document is not intended for use as a survey product. King County shall not be liable for any general, special, indirect, incidental, or consequential damages including, but not limited to, lost revenues or lost profits resulting from the use or misuse of the information contained on this map. Any sale of this map or information on this map is prohibited except by written permission of King County. Date: 1/2/2015 Source: King County iMAP - Stormwater (http://www.metrokc.gov/GIS/iMAP)