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Home My WebLink AboutRS_Stormwater_Technical_Information_Report_220627_v1 Renton Senior Activity Center Bocce Court Improvements Stormwater Technical Information Report JUNE 16, 2022 JAMES ELLIS, PE WSP USA Renton Senior Activity Center Bocce Court Improvements Stormwater Technical Information Report 1 Section 1: Project Overview The City of Renton (City) Parks Planning & Natural Resources Department proposes improvements of a bocce court for senior citizens along the Cedar River in Renton, Washington. The project area is within the Township 23N, Range 5E, Section 18 and is just northeast of the Cedar River. The project includes the removal of existing synthetic turf comprising the bocce court area. The gravel underlaying the bocce court area will be lowered several inches and rubberized surfacing will be poured in place to bring the rubberized surface level with the existing surrounding surface. A corn hole court, ping pong table, pour-in-place checkerboard, and exercise equipment including a cardio stepper, health hand beat cycler, balance steps, assisted row/push up, and stretch equipment will be added to the new rubberized surface area. Additional proposed improvements include the removal and replacement of existing shrubs, new concrete pads for benches, and the replacement of existing benches. A small portion of the site lies with the 100-year floodplain of the Cedar River. There are no additional special site features such as wetlands, water bodies, and steep slopes within the project area. No permanent excavation is proposed. Poured-in-place rubberized surfacing will be placed in an approximately 2200 square feet (sq. ft.) area over existing impervious surface. There will be a poured-in-place checkerboard in an approximately 144 sq. ft. area. Two new benches will each have a 12 sq. ft. concrete pad. The site is currently covered with approximately 80% impervious surfaces over approximately 2,400 square feet. The project construction will result in the addition of approximately 100 sq ft of pavement, bringing the total to approximately 82% impervious surface coverage. KING COUNTY, WASHINGTON, SURFACE WATER DESIGN MANUAL TECHNICAL INFORMATION REPORT (TIR) WORKSHEET Part 1 PROJECT OWNER AND PROJECT ENGINEER Part 2 PROJECT LOCATION AND DESCRIPTION Project Owner ___________________________ Phone _________________________________ Address _______________________________ _______________________________________ Project Engineer _________________________ Company ______________________________ Phone _________________________________ Project Name _________________________ DPER Permit # ________________________ Location Township ______________ Range ________________ Section ________________ Site Address __________________________ _____________________________________ Part 3 TYPE OF PERMIT APPLICATION Part 4 OTHER REVIEWS AND PERMITS  Landuse (e.g.,Subdivision / Short Subd. / UPD)  Building (e.g.,M/F / Commercial / SFR)  Clearing and Grading  Right-of-Way Use  Other _______________________  DFW HPA  COE 404  DOE Dam Safety  FEMA Floodplain  COE Wetlands  Other ________  Shoreline Management  Structural Rockery/Vault/_____  ESA Section 7 Part 5 PLAN AND REPORT INFORMATION Technical Information Report Site Improvement Plan (Engr. Plans) Type of Drainage Review (check one): Date (include revision dates): Date of Final:  Full  Targeted  Simplified  Large Project  Directed __________________ __________________ __________________ Plan Type (check one): Date (include revision dates): Date of Final:  Full  Modified  Simplified __________________ __________________ __________________ Part 6 SWDM ADJUSTMENT APPROVALS Type (circle one): Standard / Experimental / Blanket Description: (include conditions in TIR Section 2) ____________________________________________________________________________________ ____________________________________________________________________________________ ____________________________________________________________________________________ Approved Adjustment No. ______________________ Date of Approval: ______________________ 2016 Surface Water Design Manual 4/24/2016 1 City of Renton, Parks Planning & Natural Resources Department Renton Senior Activity Center Bocce Court Improvements 211 Burnett Avenue N, Renton, King County, Washington, 98057 23N 5E 18Nathan Janders City of Renton Planning Division 425-430-6600 1055 S. Grady Way Renton, WA 98057 x x x x 425-430-7382 FIGURE 1: TIR WORKSHEET KING COUNTY, WASHINGTON, SURFACE WATER DESIGN MANUAL TECHNICAL INFORMATION REPORT (TIR) WORKSHEET Part 7 MONITORING REQUIREMENTS Monitoring Required: Yes / No Start Date: _______________________ Completion Date: _______________________ Describe: _________________________________ _________________________________________ _________________________________________ Re: KCSWDM Adjustment No. ________________ Part 8 SITE COMMUNITY AND DRAINAGE BASIN Community Plan : ____________________________________________________________________ Special District Overlays: ______________________________________________________________ Drainage Basin: _____________________________________________________________________ Stormwater Requirements: ____________________________________________________________ Part 9 ONSITE AND ADJACENT SENSITIVE AREAS  River/Stream ________________________  Lake ______________________________  Wetlands ____________________________  Closed Depression ____________________  Floodplain ___________________________  Other _______________________________ _______________________________  Steep Slope __________________________  Erosion Hazard _______________________  Landslide Hazard ______________________  Coal Mine Hazard ______________________  Seismic Hazard _______________________  Habitat Protection ______________________  _____________________________________ Part 10 SOILS Soil Type _________________ _________________ _________________ _________________ Slopes _________________ _________________ _________________ _________________ Erosion Potential _________________ _________________ _________________ _________________  High Groundwater Table (within 5 feet)  Other ________________________________  Sole Source Aquifer  Seeps/Springs  Additional Sheets Attached 2016 Surface Water Design Manual 4/24/2016 2 x KING COUNTY, WASHINGTON, SURFACE WATER DESIGN MANUAL TECHNICAL INFORMATION REPORT (TIR) WORKSHEET Part 11 DRAINAGE DESIGN LIMITATIONS REFERENCE  Core 2 – Offsite Analysis_________________  Sensitive/Critical Areas__________________  SEPA________________________________  LID Infeasibility________________________  Other________________________________  _____________________________________ LIMITATION / SITE CONSTRAINT _______________________________________ _______________________________________ _______________________________________ _______________________________________ _______________________________________ _______________________________________  Additional Sheets Attached Part 12 TIR SUMMARY SHEET (provide one TIR Summary Sheet per Threshold Discharge Area) Threshold Discharge Area: (name or description) Core Requirements (all 8 apply): Discharge at Natural Location Number of Natural Discharge Locations: Offsite Analysis Level: 1 / 2 / 3 dated:__________________ Flow Control (include facility summary sheet) Level: 1 / 2 / 3 or Exemption Number ____________ Flow Control BMPs _______________________________ Conveyance System Spill containment located at: _________________________ Erosion and Sediment Control / Construction Stormwater Pollution Prevention CSWPP/CESCL/ESC Site Supervisor: _____________________ Contact Phone: _________________________ After Hours Phone: _________________________ Maintenance and Operation Responsibility (circle one): Private / Public If Private, Maintenance Log Required: Yes / No Financial Guarantees and Liability Provided: Yes / No Water Quality (include facility summary sheet) Type (circle one): Basic / Sens. Lake / Enhanced Basic / Bog or Exemption No. ______________________ Landscape Management Plan: Yes / No Special Requirements (as applicable): Area Specific Drainage Requirements Type: CDA / SDO / MDP / BP / LMP / Shared Fac. / None Name: ________________________ Floodplain/Floodway Delineation Type (circle one): Major / Minor / Exemption / None 100-year Base Flood Elevation (or range): ______________ Datum: Flood Protection Facilities Describe: 2016 Surface Water Design Manual 4/24/2016 3 Bocce Court None KING COUNTY, WASHINGTON, SURFACE WATER DESIGN MANUAL TECHNICAL INFORMATION REPORT (TIR) WORKSHEET Part 12 TIR SUMMARY SHEET (provide one TIR Summary Sheet per Threshold Discharge Area) Source Control (comm ercial / industrial land use) Describe land use: Describe any structural controls: Oil Control High-use Site: Yes / No Treatment BMP: ________________________________ Maintenance Agreement: Yes / No with whom? ____________________________________ Other Drainage Structures Describe: Part 13 EROSION AND SEDIMENT CONTROL REQUIREMENTS MINIMUM ESC REQUIREMENTS DURING CONSTRUCTION  Clearing Limits  Cover Measures  Perimeter Protection  Traffic Area Stabilization  Sediment Retention  Surface Water Collection  Dewatering Control  Dust Control  Flow Control  Protection of Flow Control BMP Facilities (existing and proposed)  Maintain BMPs / Manage Project MINIMUM ESC REQUIREMENTS AFTER CONSTRUCTION  Stabilize exposed surfaces  Remove and restore Temporary ESC Facilities  Clean and remove all silt and debris, ensure operation of Permanent Facilities, restore operation of Flow Control BMP Facilities as necessary  Flag limits of SAO and open space preservation areas  Other ______________________ Part 14 STORMWATER FACILITY DESCRIPTIONS (Note: Include Facility Summary and Sketch) Flow Control Type/Description Water Quality Type/Description  Detention  Infiltration  Regional Facility  Shared Facility  Flow Control BMPs  Other ________________ ________________ ________________ ________________ ________________ ________________  Vegetated Flowpath  Wetpool  Filtration  Oil Control  Spill Control  Flow Control BMPs  Other ________________ ________________ ________________ ________________ ________________ ________________ ________________ 2016 Surface Water Design Manual 4/24/2016 4 x x x x x x x x x x KING COUNTY, WASHINGTON, SURFACE WATER DESIGN MANUAL TECHNICAL INFORMATION REPORT (TIR) WORKSHEET Part 15 EASEMENTS/TRACTS Part 16 STRUCTURAL ANALYSIS  Drainage Easement  Covenant  Native Growth Protection Covenant  Tract  Other ___________________________  Cast in Place Vault  Retaining Wall  Rockery > 4’ High  Structural on Steep Slope  Other ______________________________ Part 17 SIGNATURE OF PROFESSIONAL ENGINEER I, or a civil engineer under my supervision, have visited the site. Actual site conditions as observed were incorporated into this worksheet and the attached Technical Information Report. To the best of my knowledge the information provided here is accurate. Signed/Date 2016 Surface Water Design Manual 4/24/2016 5 , PE Figure 2. Site LocationProject Location TRAINING ZONETRAINING ZONETRAINING ZONETRAINING ZONETRAINING ZONETRAINING ZONETRAINING ZONETRAINING ZONEPOURED IN PLACE RUBBERIZED SURFACING NEW CONCRETE WABASH VALLEY BENCH SIDE AND CENTER ARM REST BLACK HORIZONTAL SLAT WABASH VALLEY BENCH SIDE AND CENTER ARM REST BLACK HORIZONTAL SLAT PING PONG TABLE WABASH VALLEY BENCH SIDE AND CENTER ARM REST BLACK HORIZONTAL SLATCORN HOLE PITCHCORN HOLE BOARD PRODUCT TBD TREES BOTANICAL / COMMON NAME SIZE QTY EXISTING TREE ---1 SHRUBS BOTANICAL / COMMON NAME SIZE QTY EUONYMUS JAPONICUS 'MICROPHYLLUS' / BOXLEAF EUNONYMUS 3 GAL.32 PLANT AND MATERIALS SCHEDULE DRIP LINE WABASH VALLEY BENCH SIDE AND CENTER ARM REST BLACK HORIZONTAL SLAT STRETCH EQUIPMENT BALANCE STEPS ASSISTED ROW/PUSH-UP CARDIO STEPPER HEALTH BEAT HAND CYCLER INTRO SIGN Last Saved by: USRH556422 on: May 5, 2022 4:29 PM File: C:\Users\USRH556422\OneDrive - WSP O365\PROJECTS\RENTON BOCCE COURT\CAD\Renton Bocce Court.dwgCopyright © WSP USA Inc. All Rights Reserved.PORTLAND OFFICE SCALES ACCORDINGLY. THIS SHEET, ADJUST IF NOT ONE INCH ON 0" 1" ORIGINAL DRAWING. BAR IS ONE INCH ON VERIFY SCALES APPRBYNO.DATE REVISIONS SHEET NO. DRAWING NO. DATE: RENTON FITNESS COURT RENTON SENIOR ACTIVITY CENTER PROJECT NO:SCALE: 1" = 5' CHECKED BY: DRAWN BY: RWH DESIGNED BY: 5331 SW MACADAM AVE., #287 PORTLAND, OR 97239 503.419.2130 OFFICE 503.639.2710 FAX WSP USA Inc. 210 East 13th Street Suite 300 Vancouver, WA 98660-3231 TEL: 360-823-6100 FAX: 360-823-6101 30901826MAY 2022 SITE AND PLANTING PLAN L1 1-1 EXISTING DRAINAGE BASIN (2881 SQ FT) SHEET FLOW TOWARD CEDAR RIVER (APPROX 100 FT) FIGURE 3: DRAINAGE BASINS Soil Map—King County Area, Washington (Renton Senior Activity Center Bocce Court Improvements) Natural Resources Conservation Service Web Soil Survey National Cooperative Soil Survey 5/24/2022 Page 1 of 352585005258800525910052594005259700526000052603005258500525880052591005259400525970052600005260300558400558700559000559300559600559900560200560500560800561100 558400 558700 559000 559300 559600 559900 560200 560500 560800 561100 47° 29' 38'' N 122° 13' 36'' W47° 29' 38'' N122° 11' 16'' W47° 28' 37'' N 122° 13' 36'' W47° 28' 37'' N 122° 11' 16'' WN Map projection: Web Mercator Corner coordinates: WGS84 Edge tics: UTM Zone 10N WGS84 0 500 1000 2000 3000 Feet 0 150 300 600 900 Meters Map Scale: 1:13,400 if printed on A landscape (11" x 8.5") sheet. FIGURE 4: SOIL MAP MAP LEGEND MAP INFORMATION Area of Interest (AOI) Area of Interest (AOI) Soils Soil Map Unit Polygons Soil Map Unit Lines Soil Map Unit Points Special Point Features Blowout Borrow Pit Clay Spot Closed Depression Gravel Pit Gravelly Spot Landfill Lava Flow Marsh or swamp Mine or Quarry Miscellaneous Water Perennial Water Rock Outcrop Saline Spot Sandy Spot Severely Eroded Spot Sinkhole Slide or Slip Sodic Spot Spoil Area Stony Spot Very Stony Spot Wet Spot Other Special Line Features Water Features Streams and Canals Transportation Rails Interstate Highways US Routes Major Roads Local Roads Background Aerial Photography The soil surveys that comprise your AOI were mapped at 1:24,000. Please rely on the bar scale on each map sheet for map measurements. Source of Map: Natural Resources Conservation Service Web Soil Survey URL: Coordinate System: Web Mercator (EPSG:3857) Maps from the Web Soil Survey are based on the Web Mercator projection, which preserves direction and shape but distorts distance and area. A projection that preserves area, such as the Albers equal-area conic projection, should be used if more accurate calculations of distance or area are required. This product is generated from the USDA-NRCS certified data as of the version date(s) listed below. Soil Survey Area: King County Area, Washington Survey Area Data: Version 17, Aug 23, 2021 Soil map units are labeled (as space allows) for map scales 1:50,000 or larger. Date(s) aerial images were photographed: Jul 6, 2020—Jul 27, 2020 The orthophoto or other base map on which the soil lines were compiled and digitized probably differs from the background imagery displayed on these maps. As a result, some minor shifting of map unit boundaries may be evident. Soil Map—King County Area, Washington (Renton Senior Activity Center Bocce Court Improvements) Natural Resources Conservation Service Web Soil Survey National Cooperative Soil Survey 5/24/2022 Page 2 of 3 Map Unit Legend Map Unit Symbol Map Unit Name Acres in AOI Percent of AOI 3056 Urban land-Alderwood complex, 5 to 12 percent slopes 3.9 0.5% 3057 Urban land-Alderwood complex, 12 to 35 percent slopes 34.2 4.2% 3060 Alderwood-Everett-Urban land complex, 35 to 60 percent slopes 9.1 1.1% 5017 Urban land-Beausite complex, 5 to 12 percent slopes 1.1 0.1% 5018 Urban land-Beausite complex, 12 to 35 percent slopes 15.2 1.9% 5019 Beausite-Alderwood-Urban land complex, 0 to 12 percent slopes 3.6 0.4% 5020 Beausite-Alderwood-Urban land complex, 12 to 35 percent slopes 43.7 5.3% AgD Alderwood gravelly sandy loam, 15 to 30 percent slopes 9.1 1.1% AkF Alderwood and Kitsap soils, very steep 19.7 2.4% AmC Arents, Alderwood material, 6 to 15 percent slopes 1.0 0.1% An Arents, Everett material 9.1 1.1% EvD Everett very gravelly sandy loam, 15 to 30 percent slopes 11.6 1.4% InC Indianola loamy sand, 5 to 15 percent slopes 21.3 2.6% InD Indianola loamy sand, 15 to 30 percent slopes 0.4 0.0% Pc Pilchuck loamy fine sand 22.6 2.8% PITS Pits 0.3 0.0% Rh Riverwash 18.4 2.2% Ur Urban land 578.2 70.7% W Water 15.6 1.9% Totals for Area of Interest 818.1 100.0% Soil Map—King County Area, Washington Renton Senior Activity Center Bocce Court Improvements Natural Resources Conservation Service Web Soil Survey National Cooperative Soil Survey 5/24/2022 Page 3 of 3 Renton Senior Activity Center Bocce Court Improvements Stormwater Technical Information Report 12 Section 2: Conditions and Requirements Per Chapter 1 of the City of Renton Surface Water Design Manual (SWDM), the project must undergo a Targeted Drainage Review (TDR). Figure 5 shows the flow chart used to determine the required level of drainage review. Per Section 1.1.2 of the Manual, the project falls under TDR Category #1 because it is adjacent to the Cedar River flood hazard area. Category 1 TDRs must meet Core Requirement (CR) 5 as well as additional CRs as required by the Community and Economic Development Department (CED). At this time no other CRs are required. Additionally, category 1 TDRs must meet Special Requirements (SR) 1, 2, 3, 4 and 6 as applicable. Each Core Requirement and Special Requirement is addressed below. SECTION 1.1 DRAINAGE REVIEW 12/12/2016 2017 City of Renton Surface Water Design Manual 1-14 FIGURE 1.1.2.A FLOW CHART FOR DETERMINING TYPE OF DRAINAGE REVIEW REQUIRED Cat 1 FIGURE 5: Renton Senior Activity Center Bocce Court Improvements Stormwater Technical Information Report 14 2.1 Core Requirements Core Requirement #5: Erosion and Sediment Control 2.2 Special Requirements Special Requirement #1: Other Adopted Area-Specific Requirements SR #1 requires projects to meet any additional area-specific requirements. These may include:  Master Drainage Plans  Basin Plans  Salmon Conservation Plans  Lake Management Plans  Hazard Mitigation Plans  Shared Facility Drainage Plans No area-specific requirements apply to this project; thus SR #1 is not applicable. Special Requirement #2: Flood Hazard Area Delineation A portion of the project lies within the 100-year floodplain of the Cedar River, so a flood hazard area delineation is required under SR #2. Figure 6 below shows the FEMA Special Flood Hazard Area (SFHA) Map, and Figure 7 shows an approximate delineation of the Special Flood Hazard Area on the site plan. No work will occur within the regulatory floodway. The only work that will occur within the SFHA is the installation of two benches on concrete pads. The concrete pads will be installed to match the existing grade and will not reduce the storage volume within the floodplain. No compensatory storage will be required. National Flood Hazard Layer FIRMette 0 500 1,000 1,500 2,000250 Feet Ü SEE FIS REPORT FOR DETAILED LEGEND AND INDEX MAP FOR FIRM PANEL LAYOUT SPECIAL FLOOD HAZARD AREAS Without Base Flood Elevation (BFE) Zone A, V, A99 With BFE or DepthZone AE, AO, AH, VE, AR Regulatory Floodway 0.2% Annual Chance Flood Hazard, Areas of 1% annual chance flood with average depth less than one foot or with drainage areas of less than one square mileZone X Future Conditions 1% Annual Chance Flood HazardZone X Area with Reduced Flood Risk due to Levee. See Notes.Zone X Area with Flood Risk due to LeveeZone D NO SCREEN Area of Minimal Flood Hazard Zone X Area of Undetermined Flood HazardZone D Channel, Culvert, or Storm Sewer Levee, Dike, or Floodwall Cross Sections with 1% Annual Chance 17.5 Water Surface Elevation Coastal Transect Coastal Transect Baseline Profile Baseline Hydrographic Feature Base Flood Elevation Line (BFE) Effective LOMRs Limit of Study Jurisdiction Boundary Digital Data Available No Digital Data Available Unmapped This map complies with FEMA's standards for the use of digital flood maps if it is not void as described below. The basemap shown complies with FEMA's basemap accuracy standards The flood hazard information is derived directly from the authoritative NFHL web services provided by FEMA. This map was exported on 5/24/2022 at 11:31 AM and does not reflect changes or amendments subsequent to this date and time. The NFHL and effective information may change or become superseded by new data over time. This map image is void if the one or more of the following map elements do not appear: basemap imagery, flood zone labels, legend, scale bar, map creation date, community identifiers, FIRM panel number, and FIRM effective date. Map images for unmapped and unmodernized areas cannot be used for regulatory purposes. Legend OTHER AREAS OF FLOOD HAZARD OTHER AREAS GENERAL STRUCTURES OTHER FEATURES MAP PANELS 8 B 20.2 The pin displayed on the map is an approximate point selected by the user and does not represent an authoritative property location. 1:6,000 122°12'46"W 47°29'20"N 122°12'9"W 47°28'56"N Basemap: USGS National Map: Orthoimagery: Data refreshed October, 2020 PROJECT SITE FIGURE 6: FEMA SPECIAL FLOOD HAZARD AREA MAP TRAINING ZONETRAINING ZONETRAINING ZONETRAINING ZONETRAINING ZONETRAINING ZONETRAINING ZONETRAINING ZONEPOURED IN PLACE RUBBERIZED SURFACING NEW CONCRETE WABASH VALLEY BENCH SIDE AND CENTER ARM REST BLACK HORIZONTAL SLAT WABASH VALLEY BENCH SIDE AND CENTER ARM REST BLACK HORIZONTAL SLAT PING PONG TABLE WABASH VALLEY BENCH SIDE AND CENTER ARM REST BLACK HORIZONTAL SLATCORN HOLE PITCHCORN HOLE BOARD PRODUCT TBD TREES BOTANICAL / COMMON NAME SIZE QTY EXISTING TREE ---1 SHRUBS BOTANICAL / COMMON NAME SIZE QTY EUONYMUS JAPONICUS 'MICROPHYLLUS' / BOXLEAF EUNONYMUS 3 GAL.32 PLANT AND MATERIALS SCHEDULE DRIP LINE WABASH VALLEY BENCH SIDE AND CENTER ARM REST BLACK HORIZONTAL SLAT STRETCH EQUIPMENT BALANCE STEPS ASSISTED ROW/PUSH-UP CARDIO STEPPER HEALTH BEAT HAND CYCLER INTRO SIGN Last Saved by: USRH556422 on: May 5, 2022 4:29 PM File: C:\Users\USRH556422\OneDrive - WSP O365\PROJECTS\RENTON BOCCE COURT\CAD\Renton Bocce Court.dwgCopyright © WSP USA Inc. All Rights Reserved.PORTLAND OFFICE SCALES ACCORDINGLY. THIS SHEET, ADJUST IF NOT ONE INCH ON 0" 1" ORIGINAL DRAWING. BAR IS ONE INCH ON VERIFY SCALES APPRBYNO.DATE REVISIONS SHEET NO. DRAWING NO. DATE: RENTON FITNESS COURT RENTON SENIOR ACTIVITY CENTER PROJECT NO:SCALE: 1" = 5' CHECKED BY: DRAWN BY: RWH DESIGNED BY: 5331 SW MACADAM AVE., #287 PORTLAND, OR 97239 503.419.2130 OFFICE 503.639.2710 FAX WSP USA Inc. 210 East 13th Street Suite 300 Vancouver, WA 98660-3231 TEL: 360-823-6100 FAX: 360-823-6101 30901826MAY 2022 SITE AND PLANTING PLAN L1 1-1 APPROXIMATE LIMIT OF CEDAR RIVER 100-YEAR FLOODPLAIN FIGURE 7: FLOODPLAIN BOUNDARY DELINEATION Renton Senior Activity Center Bocce Court Improvements Stormwater Technical Information Report 17 Special Requirement #3: Flood Protection Facilities The proposed project will not rely on new or existing flood protection facilities, thus SR #3 is not applicable. Special Requirement #4: Source Controls The proposed project does not require a commercial building or commercial site development permit, thus SR #4 is not applicable. Special Requirement #6: Aquifer Protection Area The proposed project does not lie in an aquifer protection area, thus SR #6 does not apply. Section 6: Special Report and Studies A floodplain delineation is discussed in Section 2.2 and shown in Figures 6 and 7. Section 8: CSWPP Plan Analysis and Design The project will follow erosion and sediment control (ESC) practices as described in Appendix D of the SWDM and the Stormwater Management Manual for Western Washington (SWMMWW). An ESC plan is included as Figure 8. Below is a description of each required ESC category and how it is addressed using BMPs from the SWMMWW. Clearing Limits Project clearing limits will be marked using a high visibility construction fence. Areas outside of the marked clearing limits will remain undisturbed and natural vegetation will be preserved. BMP Measures: C101, C102, C103 Cover Measures Temporary and permanent cover measures will be implemented to protect all disturbed areas and exposed soil. If an area will remain unworked for more than seven days during the dry season then temporary cover (erosion control blankets or plastic covering) will be installed. Any area that remains unworked for more than 30 days must be seeded or sodded unless otherwise determined by the City. BMP Measures: C122, C123, C124 Perimeter Protection Perimeter protection shall be placed downstream of disturbed areas prior to upstream grading to remove sediment from sheet flow runoff. Silt fence shall be used on the downhill side of the clearing limits to capture sediment. BMP Measures: C233 Renton Senior Activity Center Bocce Court Improvements Stormwater Technical Information Report 18 Traffic Area Stabilization It is not expected that construction traffic will be using unsurfaced roads or parking areas, thus traffic area stabilization will not be necessary. If construction traffic requires use of unsurfaced areas, construction road/parking area stabilization measures will be implemented per Section D.2.1.4.2 of the SWDM. BMP Measures: C105, C106, C107 Sediment Retention The area of disturbed soil is small enough to be treated solely with perimeter protection measures. See Perimeter Protection above for further information. BMP Measures: C233 Surface Water Collection The area of disturbed soil is small enough to be treated solely with perimeter protection measures. See Perimeter Protection above for further information. BMP Measures: C233 Dewatering Control Dewatering is not anticipated for this project. Dust Control At any time that exposed soils are dry enough that wind transport is possible, dust control measures shall be used. Water will be used to control dust. Exposed soils will be sprayed until wet enough to not produce dust, but not enough to generate runoff. Section D.2.1.8 of the SWDM recommends application of water at a rate of 0.125 gallons per square yard of exposed soil every 20 to 30 minutes. BMP Measures: C140 Flow Control The project is not expected to increase runoff flow rates during or after construction. Temporary flow control will not be necessary. Control Pollutants Concrete handling measures will be implemented when constructing foundations, surfacing, and other poured/cast-in-place installations. BMP Measures: C151, C152, C153, C154 Protect Existing and Proposed Stormwater Facilities and On-Site BMPs No stormwater facilities or BMPs exist within the project limits. Adjacent facilities will be protected to maintain function and avoid sedimentation. Facilities and BMPs will be protected with silt fence and catch basin inlet protection. BMP Measures: C230, C233 Renton Senior Activity Center Bocce Court Improvements Stormwater Technical Information Report 19 Maintain Protective BMPs All BMPs will be maintained and repaired as needed throughout the duration of the project. Temporary erosion and sediment control BMPs will be removed upon completion of construction activities and prior to final construction approval. BMP Measures: C160 Manage the Project A certified CSWPP Supervisor will be the primary contact for ESC related issues. The CSWPP Supervisor will manage the project to coordinate implementation and maintenance of all ESC measures. BMP Measures: C160, C162 TRAINING ZONETRAINING ZONETRAINING ZONETRAINING ZONETRAINING ZONETRAINING ZONETRAINING ZONETRAINING ZONEPOURED IN PLACE RUBBERIZED SURFACING NEW CONCRETE WABASH VALLEY BENCH SIDE AND CENTER ARM REST BLACK HORIZONTAL SLAT WABASH VALLEY BENCH SIDE AND CENTER ARM REST BLACK HORIZONTAL SLAT PING PONG TABLE WABASH VALLEY BENCH SIDE AND CENTER ARM REST BLACK HORIZONTAL SLATCORN HOLE PITCHCORN HOLE BOARD PRODUCT TBD TREES BOTANICAL / COMMON NAME SIZE QTY EXISTING TREE ---1 SHRUBS BOTANICAL / COMMON NAME SIZE QTY EUONYMUS JAPONICUS 'MICROPHYLLUS' / BOXLEAF EUNONYMUS 3 GAL.32 PLANT AND MATERIALS SCHEDULE DRIP LINE WABASH VALLEY BENCH SIDE AND CENTER ARM REST BLACK HORIZONTAL SLAT STRETCH EQUIPMENT BALANCE STEPS ASSISTED ROW/PUSH-UP CARDIO STEPPER HEALTH BEAT HAND CYCLER INTRO SIGN Last Saved by: USRH556422 on: May 5, 2022 4:29 PM File: C:\Users\USRH556422\OneDrive - WSP O365\PROJECTS\RENTON BOCCE COURT\CAD\Renton Bocce Court.dwgCopyright © WSP USA Inc. All Rights Reserved.PORTLAND OFFICE SCALES ACCORDINGLY. THIS SHEET, ADJUST IF NOT ONE INCH ON 0" 1" ORIGINAL DRAWING. BAR IS ONE INCH ON VERIFY SCALES APPRBYNO.DATE REVISIONS SHEET NO. DRAWING NO. DATE: RENTON FITNESS COURT RENTON SENIOR ACTIVITY CENTER PROJECT NO:SCALE: 1" = 5' CHECKED BY: DRAWN BY: RWH DESIGNED BY: 5331 SW MACADAM AVE., #287 PORTLAND, OR 97239 503.419.2130 OFFICE 503.639.2710 FAX WSP USA Inc. 210 East 13th Street Suite 300 Vancouver, WA 98660-3231 TEL: 360-823-6100 FAX: 360-823-6101 30901826MAY 2022 SITE AND PLANTING PLAN L1 1-1 SHEET FLOW TOWARD CEDAR RIVER (APPROX 100 FT) MARK CLEARING LIMITS WITH HIGH VISIBILITY CONSTRUCTION FENCE PER BMP C103 SILT FENCE PER BMP C233 CONSTRUCTION ACCESS THROUGH EXISTING PARKING LOT STABILIZE ANY SOILS LEFT EXPOSED FOR MORE THAN 7 DAYS USING EROSION CONTROL BLANKETS (BMP C123) OR PLASTIC COVERING (BMP C122) EROSION AND SEDIMENT CONTROL NOTES: 1. APPROVAL OF THIS EROSION AND SEDIMENTATION CONTROL (ESC) PLAN DOES NOT CONSTITUTE AN APPROVAL OF PERMANENT ROAD OR DRAINAGE DESIGN (E.G., SIZE AND LOCATION OF ROADS, PIPES, RESTRICTORS, CHANNELS, RETENTION FACILITIES, UTILITIES, ETC.). 2. THE IMPLEMENTATION OF THESE ESC PLANS AND THE CONSTRUCTION, MAINTENANCE, REPLACEMENT, AND UPGRADING OF THESE ESC FACILITIES IS THE RESPONSIBILITY OF THE APPLICANT/ESC SUPERVISOR UNTIL ALL CONSTRUCTION IS APPROVED. 3. THE BOUNDARIES OF THE CLEARING LIMITS SHOWN ON THIS PLAN SHALL BE CLEARLY FLAGGED BY SURVEY TAPE OR FENCING, IF REQUIRED, PRIOR TO CONSTRUCTION (SWDM APPENDIX D). DURING THE CONSTRUCTION PERIOD, NO DISTURBANCE BEYOND THE CLEARING LIMITS SHALL BE PERMITTED. THE CLEARING LIMITS SHALL BE MAINTAINED BY THE APPLICANT/ESC SUPERVISOR FOR THE DURATION OF CONSTRUCTION. 4. STABILIZED CONSTRUCTION ENTRANCES SHALL BE INSTALLED AT THE BEGINNING OF CONSTRUCTION AND MAINTAINED FOR THE DURATION OF THE PROJECT. ADDITIONAL MEASURES, SUCH AS CONSTRUCTED WHEEL WASH SYSTEMS OR WASH PADS, MAY BE REQUIRED TO ENSURE THAT ALL PAVED AREAS ARE KEPT CLEAN AND TRACK OUT TO ROAD RIGHT OF WAY DOES NOT OCCUR FOR THE DURATION OF THE PROJECT. 5. THE ESC FACILITIES SHOWN ON THIS PLAN MUST BE CONSTRUCTED PRIOR TO OR IN CONJUNCTION WITH ALL CLEARING AND GRADING SO AS TO ENSURE THAT THE TRANSPORT OF SEDIMENT TO SURFACE WATERS, DRAINAGE SYSTEMS, FLOW CONTROL BMP LOCATIONS (EXISTING AND PROPOSED),AND ADJACENT PROPERTIES IS MINIMIZED. 6. THE ESC FACILITIES SHOWN ON THIS PLAN ARE THE MINIMUM REQUIREMENTS FOR ANTICIPATED SITE CONDITIONS. DURING THE CONSTRUCTION PERIOD, THESE ESC FACILITIES SHALL BE UPGRADED AS NEEDED FOR UNEXPECTED STORM EVENTS AND MODIFIED TO ACCOUNT FOR CHANGING SITE CONDITIONS (E.G. ADDITIONAL COVER MEASURES, ADDITIONAL SUMP PUMPS, RELOCATION OF DITCHES AND SILT FENCES, PERIMETER PROTECTION ETC.) AS DIRECTED BY KING COUNTY. 7. THE ESC FACILITIES SHALL BE INSPECTED DAILY BY THE APPLICANT/ESC SUPERVISOR AND MAINTAINED TO ENSURE CONTINUED PROPER FUNCTIONING. WRITTEN RECORDS SHALL BE KEPT OF WEEKLY REVIEWS OF THE ESC FACILITIES. 8. ANY AREAS OF EXPOSED SOILS, INCLUDING ROADWAY EMBANKMENTS, THAT WILL NOT BE DISTURBED FOR TWO CONSECUTIVE DAYS DURING THE WET SEASON OR SEVEN DAYS DURING THE DRY SEASON SHALL BE IMMEDIATELY STABILIZED WITH THE APPROVED ESC METHODS (E.G., SEEDING, MULCHING, PLASTIC COVERING, ETC.). 9. ANY AREA NEEDING ESC MEASURES THAT DO NOT REQUIRE IMMEDIATE ATTENTION SHALL BE ADDRESSED WITHIN SEVEN (7) DAYS. 10. THE ESC FACILITIES ON INACTIVE SITES SHALL BE INSPECTED AND MAINTAINED A MINIMUM OF ONCE A MONTH DURING THE DRY SEASON, BI-MONTHLY DURING THE WET SEASON, OR WITHIN TWENTY FOUR (24) HOURS FOLLOWING A STORM EVENT. 11. AT NO TIME SHALL MORE THAN ONE (1) FOOT OF SEDIMENT BE ALLOWED TO ACCUMULATE WITHIN A CATCH BASIN. ALL CATCH BASINS AND CONVEYANCE LINES SHALL BE CLEANED PRIOR TO PAVING. THE CLEANING OPERATION SHALL NOT FLUSH SEDIMENT-LADEN WATER INTO THE DOWNSTREAM SYSTEM. 12. ANY PERMANENT RETENTION/DETENTION FACILITY USED AS A TEMPORARY SETTLING BASIN SHALL BE MODIFIED WITH THE NECESSARY EROSION CONTROL MEASURES AND SHALL PROVIDE ADEQUATE STORAGE CAPACITY. IF THE FACILITY IS TO FUNCTION ULTIMATELY AS AN INFILTRATION SYSTEM, THE TEMPORARY FACILITY MUST BE ROUGH GRADED SO THAT THE BOTTOM AND SIDES ARE AT LEAST THREE FEET ABOVE THE FINAL GRADE OF THE PERMANENT FACILITY. FLOW CONTROL BMP AREAS (EXISTING OR PROPOSED) SHALL NOT BE USED AS TEMPORARY FACILITIES AND SHALL BE PROTECTED FROM SEDIMENTATION AND INTRUSION. 13. COVER MEASURES WILL BE APPLIED IN CONFORMANCE WITH APPENDIX D OF THE KING COUNTY SURFACE WATER DESIGN MANUAL. 14. PRIOR TO THE BEGINNING OF THE WET SEASON (OCT. 1), ALL DISTURBED AREAS SHALL BE REVIEWED TO IDENTIFY WHICH ONES CAN BE SEEDED IN PREPARATION FOR THE WINTER RAINS. DISTURBED AREAS SHALL BE SEEDED WITHIN ONE WEEK OF THE BEGINNING OF THE WET SEASON. A SKETCH MAP OF THOSE AREAS TO BE SEEDED AND THOSE AREAS TO REMAIN UNCOVERED SHALL BE SUBMITTED TO THE DLS-PERMITTING INSPECTOR. FIGURE 8: EROSION AND SEDIMENT CONTROL PLAN