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HomeMy WebLinkAboutRS_WCLS_Phase 1_TIR_Final_20250311_v1 World Cup Legacy Square – City of Renton i World Cup Legacy Square City of Renton, WA Technical Information Report March 2025 | Civil Construction Permit Report World Cup Legacy Square – City of Renton ii Technical Information Report March 2025 Prepared for: City of Renton Prepared By: Emma Conley, PE Troy Solly, PE Justin Johnson, PE Brianne Bannwarth, PE City of Renton 43175PR O FESSIONA L E N GINEERBRIANN E B ANNWAR T HSTATE O F WASHINGTO N REGISTER E D 3/11/2025 World Cup Legacy Square – City of Renton iii TABLE OF CONTENTS 1. PROJECT OVERVIEW ................................................................................................... 1 1.A Existing Conditions ....................................................................................................... 2 1.B Proposed Conditions .................................................................................................... 3 2. CONDITIONS AND REQUIREMENTS SUMMARY .............................................................. 4 2.A Core requirements ........................................................................................................ 4 Core Requirement #1 – Discharge at the Natural Location .............................................. 4 Core Requirement #2 – Offsite Analysis ......................................................................... 4 Core Requirement #3 – Flow Control ............................................................................. 4 Core Requirement #4 – Conveyance System ................................................................. 4 Core Requirement #5 – Construction Stormwater Pollution Prevention ........................... 5 Core Requirement #6 – Maintenance and Operations .................................................... 5 Core Requirement #7 – Financial Guarantees and Liability ............................................. 5 Core Requirement #8 – Water Quality ............................................................................ 5 Core Requirement #9 – On-Site BMPs ........................................................................... 5 2.B SPECIAL REQUIREMENT ............................................................................................... 6 Special Requirement #1 – Other Adopted Area-Speciflc Requirements ........................... 6 Special Requirement #2 – Flood Hazard Area Delineation .............................................. 6 Special Requirement #3 – Flood Protection Facilities ..................................................... 6 Special Requirement #4 – Source Control ..................................................................... 6 Special Requirement #5 – Oil Control ............................................................................ 6 Special Requirement #6 – Aquifer Protection Area ......................................................... 7 3. OFF-SITE ANALYSIS ..................................................................................................... 7 4. FLOW CONTROL, LOW IMPACT DEVELOPMENT (LID), AND WATER QUALITY FACILITY ANALYSIS AND DESIGN ........................................................................................... 8 4.A Existing Site Hydrology .................................................................................................. 8 4.B Developed Site Hydrology ............................................................................................. 8 4.C Performance Standards ................................................................................................ 9 Flow Control ................................................................................................................ 9 Water Quality ............................................................................................................... 9 Onsite BMPs ................................................................................................................ 9 4.D Flow Control System ..................................................................................................... 9 4.E Water Quality System ................................................................................................. 10 World Cup Legacy Square – City of Renton iv 5. CONVEYANCE SYSTEM ANALYSIS AND DESIGN ............................................................ 10 6. SPECIAL REPORTS AND STUDIES ................................................................................ 11 7. OTHER PERMITS ........................................................................................................ 11 8. CONSTRUCTION STORMWATER POLLUTION PREVENTION PLAN (CSWPPP) ANALYSIS AND DESIGN ................................................................................................................. 11 8.A EROSION AND SEDIMENT CONTROL PLAN ANALYSIS AND DESIGN ............................. 11 1. Clearing Limits .................................................................................................... 11 2. Cover Measures .................................................................................................. 11 3. Perimeter Protection ........................................................................................... 11 4. Traffic Area Stabilization ...................................................................................... 11 5. Sediment Retention ............................................................................................ 11 6. Surface Water Collection .................................................................................... 12 7. Dewatering Control ............................................................................................. 12 8. Dust Control ....................................................................................................... 12 9. Flow Control ....................................................................................................... 12 10. Control Pollutants ............................................................................................... 12 11. Protect Existing and Proposed Stormwater Facilities and On-Site BMPs ................ 12 12. Maintain Protective BMPs .................................................................................... 12 13. Manage the Project ............................................................................................. 12 8.B Stormwater Pollution Prevention and spill control Plan Design ..................................... 13 9. BOND QUANTITIES, FACILITY SUMMARIES, AND DECLARATION OF COVENANT .............. 13 10. OPERATIONS AND MAINTENANCE MANUAL ................................................................. 13 World Cup Legacy Square – City of Renton v LIST OF TABLES Table 1-1: Project's Existing Surface Areas ..................................................................................... 2 Table 1-2: Project's Proposed Surface Areas .................................................................................. 3 Table 4-1: Project's Existing Surface Areas ..................................................................................... 8 Table 4-2: Project's Proposed Surface Areas .................................................................................. 8 Table 4-3: Project's Modeled 100-Year, 15-Minute Peak Flow .......................................................... 9 Table 5-1: Project's Capacity Analysis Summary .......................................................................... 10 LIST OF FIGURES Figure 1-1: Vicinity Map ................................................................................................................. 2 Figure 1-2: Soils Map (USDA Web Soil Survey) ............................................................................... 3 Figure 3-1: Project Downstream Drainage Path .............................................................................. 7 APPENDICES APPENDIX A – TIR WORKSHEET APPENDIX B – EXISTING AND DEVELOPED CONDITIONS MAPS APPENDIX C – CIVIL TESC PLAN APPENDIX D – CRITICAL AREAS MAPS APPENDIX E – WWHM MODELING RESULTS APPENDIX F – CONVEYANCE ANALYSIS RESULTS APPENDIX G – MAINTENANCE REQUIREMENTS FOR STORMWATER FACILITIES AND ON-SITE BMPS World Cup Legacy Square – City of Renton 1 1. PROJECT OVERVIEW The World Cup Legacy Square project is located at 510 South 3rd Street in Renton, Washington. The project site is bounded by a Seattle Public Utility (SPU) easement to the north, Morris Avenue South to the east, Logan Avenue South to the west, and South 3rd Street to the south. The site covers parcel no. 7841800195, 7841800205, and 5696000005 per parcel records of King County, Washington. Historically, the western half of the site housed a commercial building, demolished in 2013 and replaced with a gravel lot. This lot remains in place, with concrete pedestrian sidewalks along its north and south sides. The eastern half of the site is currently home to Gateway Park, which features a prominent elevated concrete swirl element at its center. This area also includes existing sidewalks, utilities, lighting, landscaping, and irrigation systems. See Figure 1-1 for a vicinity map. The flrst phase of the project proposes will transform the gravel lot and Gateway Park into a public square, centered around two key features: a mini futsal court and a circular playscape enclosure. Both will require signiflcant concrete construction, new utilities, and landscaping enhancements. The utility improvements include: • Sanitary side sewer piping and cleanouts • Trench drains and underdrains • Storm drainage piping and catch basin structures. • 1 ½” water service irrigation • Luminaire poles, junction boxes, and electrical conduit routing While most utility work and site features will be located within private property, some improvements will extend into the right-of-way (ROW) and/or bordering the SPU easement. These include the replacement of concrete pedestrian sidewalks, construction of two access driveways, and connections to sewer and water mains on South 3rd Street. The second phase will involve constructing a stage on the northwest corner of the site. The stage will connect to utilities installed in the flrst phase. For detailed technical information, refer to Appendix A for the TIR worksheet. World Cup Legacy Square – City of Renton 2 Figure 1-1: Vicinity Map 1.A EXISTING CONDITIONS The western half of the site, which encompasses the existing gravel lot, features relatively minimal slopes, ranging from 0% to 3%. The gravel subgrade consists of recycled material and has been compacted over time, limiting its ability to facilitate inflltration. Runoff from this gravel lot either inflltrates into the ground or is directed to a nearby catch basin located within S 3rd Street or the SPU easement. On the eastern half of the site, Gateway Park is fully developed. A central concrete swirl element is surrounded by mature trees and landscaping. Runoff from Gateway Park fiows across the surface toward catch basins located within S 3rd Street, Logan Ave S, and the SPU easement. The storm drainage systems within S 3rd Street, Logan Ave S, and the SPU easement are 12-inch public storm drains, which ultimately converge and discharge into the Cedar River. The existing project improvement area totals 27,900 square feet (0.64 acres). Refer to Appendix B for an existing conditions map and Table 1-1 for a summary of the existing surfaces. Table 1-1: Project's Existing Surface Areas Surface Description Area (SF) Impervious Surface 24,370 Pervious Surface 3,530 TOTAL 27,900 SF (0.64 acres) World Cup Legacy Square – City of Renton 3 Soil conditions for the site are interpreted to be Urban Land soil category per the USDA Web Soil Survey shown in Figure 1-2. Figure 1-2: Soils Map (USDA Web Soil Survey) 1.B PROPOSED CONDITIONS The site improvements will include a public square centered around a miniaturized futsal court, stage, vendor parking pad, turf with underdrains, and a circular playscape enclosure. The remaining site area will be landscaped with trees other plantings. The proposed improvements will maintain the existing drainage pattern. For additional details, refer to Appendix B for the proposed conditions map and Table 1-2 for a summary of the proposed surfaces. Table 1-2: Project's Proposed Surface Areas Surface Description Area (SF) Impervious Surface 26,230 Pervious Surface 1,670 TOTAL 27,900 SF (0.64 acres) The proposed project complies with the 2022 City of Renton Surface Water Design Manual (RSWDM). The minimum drainage review requirements, as outlined in the manual, are detailed in the following sections of this report. World Cup Legacy Square – City of Renton 4 2. CONDITIONS AND REQUIREMENTS SUMMARY The proposed project results in the replacement of more than 2,000 square feet of impervious area but less than 50 acres of new impervious area. As such, a "Full Drainage Review" is required per RSWDM Section 1.1.2.4. Below is a summary of how the project will comply with the nine core requirements and six special requirements. 2.A CORE REQUIREMENTS Core Requirement #1 – Discharge at the Natural Location The project will preserve the existing topography and drainage patterns of the site. Runoff from the project will continue to discharge into the existing public stormwater conveyance systems in S 3rd Street, Logan Avenue South, and the SPU Easement. These systems ultimately discharge into the Cedar River, thereby meeting the discharge requirements outlined in Section 1.2.1 of the RSWDM. Core Requirement #2 – Offsite Analysis The proposed project adds less than 2,000 square feet of new impervious surface (1,860 SF impervious surface added) and less than ¾ acre of new pervious surface. Additionally, it does not involve the construction or modiflcation of any drainage pipes or ditches with a size or depth of 12 inches or more, nor does it affect drainage systems that receive runoff from pipes or ditches of this size or depth. The project site is not located within or adjacent to any landslide hazard, steep slope hazard area, or erosion hazard area as deflned in RMC 4-3-050. The project does however results in more than 5,000 square feet of new plus replaced impervious surface and therefore triggers Core Requirement #3, Flow Control, and therefore, in accordance with Section 1.2.2 of the RSWDM, a modifled offsite analysis was performed sufficient to identify and address “Downstream Drainage Problems Requiring Special Attention (Section 1.2.2.1.1), Problem Type 4 (Potential Impacts to Wetland Hydrology problem).” Refer to Section 3 of this report for offsite analysis. Core Requirement #3 – Flow Control The project involves more than 5,000 square feet of new and replaced impervious area, requiring evaluation of Core Requirement #3, Flow Control. The project is subject to the Peak Rate Flow Control Standard – Matching Existing Conditions. However, the project results in less than a 0.15 CFS increase in the 100-year peak fiow at the project boundary when modeled using 15-minute time steps. Additionally, there will not be a signiflcant impact on critical areas, fiooding, or erosion. Therefore, the project meets the exception criteria outlined in Section 1.2.3.1.A of the RSWDM and is not required to provide additional fiow control. For the fiow control analysis, refer to Section 4 of this report. Core Requirement #4 – Conveyance System The proposed project complies with Section 1.2.4.1 of the RSWDM. The pipe system is designed to handle both the 25-year and 100-year peak fiows, and the site has no upstream fiows. For the full conveyance analysis, refer to Section 5 of this report. World Cup Legacy Square – City of Renton 5 Core Requirement #5 – Construction Stormwater Pollution Prevention Temporary Erosion and Sediment Control (TESC) best management practices (BMPs) will be implemented during construction to prevent the transport of sediment from the project site to the maximum extent practicable. TESC BMPs are anticipated to include silt fences, straw wattles, catch basin inserts, and other measures as necessary. Refer to Appendix C for Civil TESC plans and Section 8 of this report for the Construction Stormwater Pollution Prevention Plan (CSWPPP) analysis and design. Core Requirement #6 – Maintenance and Operations The proposed project will be maintained and operated by the city. Refer to Section 9 of this report for maintenance and operations discussion. Core Requirement #7 – Financial Guarantees and Liability The project is a publicly owned and maintained; therefore, it is exempt from flnancial guarantees per RCWs. Core Requirement #8 – Water Quality The proposed project has less than 5,000 square feet of new plus replaced impervious surface (PGIS), and less than ¾ acres of pollutant generation pervious surface (PGPS), therefore, per Section 1.2.8 of the RSWDM, is exempt from the water quality requirement. Core Requirement #9 – On-Site BMPs All proposed projects, including redevelopment projects, must provide on-site BMPs to mitigate the impacts of storm and surface water runoff generated by new impervious surface, new pervious surface, existing impervious surfaces, and replaced impervious surface targeted for mitigation. For non-subdivision projects making improvements on an individual site/lot, implementation of this requirement shall be in accordance with the “Individual Lot BMP Requirements” in Section 1.2.9.2 of the RSWDM. On-site BMP requirements may be satisfled through two methods: (1) application of BMPs to the maximum extent feasible, or (2) complying with the Low Impact Development (LID) Performance Standard. The project will provide on-site BMPs to the maximum extent feasible for the replaced impervious surfaces. Following is the evaluation of feasibility and applicability of small lot BMPs for this project per Section 1.2.9.2.1 of the RSWDM. 1. Full Dispersion – The site is fully developed and cannot accommodate the required minimum native vegetated fiow path; therefore, full dispersion is considered infeasible per Section C.2.1.1 of the RSWDM. 2. Full and Limited Infiltration – The project site is located within Wellhead Protection Area, Zone 1 of the Aquifer Protection Area (APA), per City of Renton GIS maps. Per RSWDM Section 1.3.6, Special Requirement No. 6, it is prohibited to provide on-site BMPs that rely on inflltration, such as bioretention and permeable pavement. Also, per RSWDM Section C2.2, this BMP is not allowed in Zone 1 of the APA. World Cup Legacy Square – City of Renton 6 3. Rain Gardens – The project site is located within Wellhead Protection Area, Zone 1 of the APA, per City of Renton GIS maps. This BMP is not allowed in Zone 1 of the APA per Section C2.12 of the RSWDM. 4. Bioretention – The project site is located within Wellhead Protection Area, Zone 1 of the APA, per City of Renton GIS maps. Per RSWDM Section 1.3.6, Special Requirement No. 6, it is prohibited to provide on-site BMPs that rely on inflltration, such as bioretention and permeable pavement. Also, per RSWDM Section C2.6, this BMP is not allowed in Zone 1 of the APA. 5. Permeable Paving – The project site is located within Wellhead Protection Area, Zone 1 of the APA, per City of Renton GIS maps. Per RSWDM Section 1.3.6, Special Requirement No. 6, it is prohibited to provide on-site BMPs that rely on inflltration, such as bioretention and permeable pavement. In addition, per Section C2.7, this BMP is not allowed in Zone 1 of the APA. 6. Basic Dispersion – The site cannot accommodate the required minimum native vegetated fiowpath; therefore, basic dispersion is considered infeasible per Section C.2.4.1 of the RSWDM. 2.B SPECIAL REQUIREMENT Special Requirement #1 – Other Adopted Area-Specific Requirements There are no adopted area-speciflc regulations for the site. Therefore, Special Requirement No. 1 is not applicable to the project. Special Requirement #2 – Flood Hazard Area Delineation Per the City of Renton GIS Maps, the project does not contain and is not adjacent to a fiood hazard area. Per the FEMA Flood Map Service Center, the project site is within the “Other Flood Areas,” Zone X, with the annotation of 500-year fiood chance. Per RSWDM, fiood hazard areas are composed of the 100-year fioodplain, zero-rise fiood fringe, zero-rise fioodway, and FEMA fioodway. Since Zone X is not considered a 100-year fiood hazard area, Special Requirement No. 2 is not applicable to this project. Refer to Appendix D for the FEMA FIRM Map. Special Requirement #3 – Flood Protection Facilities The project will not rely on existing or proposed fiood protection facilities for protection against hazards posed by erosion or inundation. Therefore, Special Requirement No. 3 is not applicable to this project. Special Requirement #4 – Source Control Water quality source controls applicable to this project will be applied in accordance with the King County Stormwater Pollution Prevention Manual and Renton Municipal Code, Title IV. The proposed trash receptables include covers to prevent rainwater interaction. Special Requirement #5 – Oil Control The site is not considered high-use because its anticipated average daily traffic count is less than 100 vehicles per 1,000 square feet of gross building area; therefore, Special Requirement No. 5 is not applicable. World Cup Legacy Square – City of Renton 7 Special Requirement #6 – Aquifer Protection Area Per the City of Renton GIS Maps, the site is located within the Wellhead Protection Area, Zone 1 of the APA. The project does not propose any type of prohibited systems including fiow control facilities, on-site BMPs that rely on inflltration, or open channel conveyance systems. Refer to Appendix D for the City of Renton Critical Areas Map. 3. OFF-SITE ANALYSIS This modifled offsite analysis addresses “Downstream Drainage Problems Requiring Special Attention” as outlined in Section 1.2.2.1.1 of the RSWDM, speciflcally Problem Type 4–Potential Impacts to Wetland Hydrology. The project site is located within the downtown core of the City of Renton. The downstream drainage system consists of a piped conveyance system that extends for more than 1 mile before eventually discharging into the Cedar River. There are no wetlands present within this area, and as a result, no potential impacts to Wetland Hydrology are anticipated. For further details, refer to GIS CORMaps in Figure 3-1, which identifles the piped downstream system. Figure 3-1: Project Downstream Drainage Path World Cup Legacy Square – City of Renton 8 4. FLOW CONTROL, LOW IMPACT DEVELOPMENT (LID), AND WATER QUALITY FACILITY ANALYSIS AND DESIGN 4.A EXISTING SITE HYDROLOGY The project area covers 27,900 square feet (0.64 acres). The western half includes a gravel lot with minimal slopes (0% to 3%), consisting of compacted recycled material that limits inflltration. Runoff from this area either inflltrates or drains to a catch basin on S 3rd Street or the SPU easement. The eastern half of the site, Gateway Park, is fully developed with a central concrete swirl, trees, and landscaping. Runoff fiows to catch basins in S 3rd Street, Logan Ave S, and the SPU easement. The drainage systems consist of 12-inch storm drains, discharging into the Cedar River. The Urban Land soil type and land cover contribute to the site's fiow characteristics by limiting inflltration in the gravel lot while allowing runoff from Gateway Park to fiow to nearby catch basins. There are no existing fiow control BMPs onsite. Refer to Appendix B for an existing conditions map and Table 4-1 for a summary of the existing surfaces. Table 4-1: Project's Existing Surface Areas Surface Description Area (SF) Impervious Surface 191024,370 Pervious Surface 3,530 TOTAL 27,900 SF (0.64 acres) 4.B DEVELOPED SITE HYDROLOGY The proposed site improvements cover 27,900 square feet (0.64 acres) and include a public square with a mini futsal court, stage, vendor parking pad, turf with underdrains, and a circular playscape. The remaining area will be landscaped with trees other plantings. The improvements will retain the existing drainage pattern. Roadway layouts and constructed trench and yard drains are designed to maintain the existing runoff patterns ensuring proper fiow management. There are no additional fiow control BMPs proposed onsite. For additional details, refer to Appendix B for the proposed conditions map and Table 4-2 for a summary of the proposed surfaces. Table 4-2: Project's Proposed Surface Areas Surface Description Area (SF) Impervious Surface 4,990 (PGIS -LAWN & PARKING) 21,000 (IS - SIDEWALK) Pervious Surface 1,910 (LANDSCAPING) TOTAL 27,900 SF (0.64 acres) World Cup Legacy Square – City of Renton 9 4.C PERFORMANCE STANDARDS The proposed project complies with the 2022 City of Renton Surface Water Design Manual (RSWDM). The project will replace more than 2,000 square feet of impervious surface but less than 50 acres. As a result, a "Full Drainage Review" is required, as outlined in RSWDM Section 1.1.2.4. Flow Control Since the project involves more than 5,000 square feet of new and replaced impervious surfaces, Core Requirement #3, Flow Control, must be evaluated per RSWDM Section 1.2.3.1.A. The project must meet the Peak Rate Flow Control Standard—Matching Existing Conditions. This requires the developed peak discharge rates to match the existing site's peak discharge rates for the 2-, 10-, and 100-year return periods, unless the modeled increase in the 100-year peak fiow at the project boundary is less than 0.15 CFS when using 15-minute time steps. Additionally, the project should not result in signiflcant impacts to critical areas, fiooding, or erosion. Water Quality Since the project will result in less than 5,000 square feet of pollution-generating impervious surface and less than ¾ acres of pollution-generating pervious service, the project is exempt from water quality and does not need to be evaluated as per RSWDM Section 1.2.8. Onsite BMPs The project site is located within Wellhead Protection Area, Zone 1 of the APA, as indicated on the City of Renton GIS maps. According to RSWDM Section 1.3.6, Special Requirement No. 6, on-site Best Management Practices (BMPs) that rely on inflltration are prohibited in this area. Additionally, the project is situated on a fully developed site with no available space for dispersion. As a result, on-site BMPs are not feasible. For a more detailed analysis of the on-site BMPs, please refer to Section 2.A.9 of this report. 4.D FLOW CONTROL SYSTEM The proposed land use results in a minor increase of 1,620 SF in impervious area compared to the existing conditions (4,990 SF proposed + 21,000 SF proposed – 24,370 SF existing). Given the small change, the project was evaluated based on the exception criteria. Refer to Table 4-3 for a summary of the modeled 100-year, 15-minute peak fiow for both the existing and proposed land use conditions, and Appendix E for the modeled fiow rates. Table 4-3: Project's Modeled 100-Year, 15-Minute Peak Flow Land Use Condition Modeled 100-Year, 15-Minute Peak Flow (CFS) Existing Land Use 0.457 Proposed Land Use 0.475 Difference +0.018 World Cup Legacy Square – City of Renton 10 The project results in less than a 0.15-CFS increase when modeled using 15-minute time steps in the existing site’s 100-year peak fiow at the project boundary. As a result, additional fiow control is not required. Moreover, there will not be a signiflcant impact to a critical area, fiooding, or erosion. Therefore, the project meets the exception criteria outlined if Section 1.2.3.1.A of the RSWDM and is not required to provide additional fiow control. 4.E WATER QUALITY SYSTEM The project will result in less than 5,000 square feet of pollution-generating impervious surface and less than ¾ acres of pollution-generating pervious service, therefore the project is exempt from water quality and does not need to be evaluated as per RSWDM Section 1.2.8. 5. CONVEYANCE SYSTEM ANALYSIS AND DESIGN Per Core Requirement #4 of the RSWDM, the conveyance system must be analyzed and designed for the existing tributary and developed onsite runoff. Pipe systems shall be designed to convey the 25- year storm with a minimum of 6-inches of freeboard between the design water surface and structure grate. Any overfiow from the 100-year design storm must not create or aggravate a severe fiooding problem. A series of trench and yard drains are proposed as onsite to conveyance stormwater to the existing storm drainage system within the surrounding roadways and easements. Roof runoff will be collected internally to the building and discharged to an existing catch basin located in the alley south of the building. The conveyance capacity of this connection was analyzed using the 100-year peak fiow, as calculated using WWHM, and Manning’s equation to calculate capacity in a pipe. Per the WWHM output for the developed site the 100-year peak fiow rate will be 0.475 CFS, and 0.080 CFS for the maximum area draining to the 4-inch-wide trench drains throughout the site. The Manning’s Equation was used to estimate the capacity of the proposed 8-inch PVC conveyance system and the 4-inch-width trench drain. Refer to Table 5-1 for a summary of the capacity analysis for these systems and Appendix F for the WWHM Model and Manning’s Equation outputs. Table 5-1: Project's Capacity Analysis Summary Conveyance System Maximum Capacity (CFS) Flow Depth at 100-Year, 15- Minute Peak Flow 8-Inch PVC Pipe @ S=0.5% 0.919 > 0.475, therefore OK. 4.27 Inches (@ 0.475 CFS) < 8 Inches, therefore OK. 4-Inch-Wide Trench Drain @ S=0.5% 0.237 > 0.080, therefore OK. 1.68 Inches (@ 0.080 CFS) < 4 Inches, therefore OK. As shown in Table 5-1, the storm conveyance system is adequately sized to handle to the 100-year peak fiow for the target surfaces. World Cup Legacy Square – City of Renton 11 6. SPECIAL REPORTS AND STUDIES There are no special reports are studies available for the project. 7. OTHER PERMITS The required permits associated with the proposed project are identifled below: 1. City of Renton Civil Construction Permit for the site work 2. City of Renton Building Permit for the stage 3. Seattle Public Utility (SPU) access permit for storm drainage connection. A NPDES Notice of Intent is not required as the disturbed area is less than 1 acre. 8. CONSTRUCTION STORMWATER POLLUTION PREVENTION PLAN (CSWPPP) ANALYSIS AND DESIGN 8.A EROSION AND SEDIMENT CONTROL PLAN ANALYSIS AND DESIGN Temporary and permanent erosion and sediment control (ESC) measures will be implemented per Appendix D, Section D.2.1, of the RSWDM. 1. Clearing Limits Prior to any site clearing or grading, areas to remain undisturbed during project construction shall be delineated on the project’s ESC plan and physically marked on the project site. 2. Cover Measures Temporary and permanent cover measures shall be provided when necessary to protect disturbed areas. The intent of these measures is to prevent erosion by having as much area as possible covered during any period of precipitation. 3. Perimeter Protection Perimeter protection to fllter sediment from sheet fiow shall be provided downstream of all disturbed areas prior to upslope grading. 4. Traffic Area Stabilization Unsurfaced entrances, roads, and parking areas used by construction traffic shall be stabilized to minimize erosion and tracking of sediment off-site. 5. Sediment Retention Surface water will be treated solely with perimeter protection. Sediment retention facilities shall be installed prior to grading any contributing area. World Cup Legacy Square – City of Renton 12 6. Surface Water Collection The area of the site is small enough to be treated solely with perimeter protection and do not require surface water collection. There are no signiflcant sources of upstream surface water that drain onto disturbed areas of the site. 7. Dewatering Control The water resulting from construction site dewatering activities must be treated prior to discharge or disposed of as specifled. 8. Dust Control Preventative measures to minimize wind transport of soil shall be implemented when a traffic hazard may be created or when sediment transported by wind is likely to be deposited in water resources. 9. Flow Control The site area is small enough to be managed with perimeter protection alone and does not require surface water collection. Additionally, the majority of the site is already impervious, and construction activities will not result in increased runoff for the 2-year and 10-year peak fiows discharging from the site. During construction, no fiow control facilities, runoff treatment facilities, or on-site BMPs (whether existing or proposed) will be used for runoff management. 10. Control Pollutants Stormwater pollution prevention (SWPPS) measures are required to prevent, reduce, or eliminate the discharge of pollutants to on-site or adjacent stormwater systems or watercourses from construction-related activities such as materials delivery and storage, on-site equipment fueling and maintenance, demolition of existing buildings and disposition of demolition materials and other waste, and concrete handling, washout and disposal. Section D.2.2 describes BMPs speciflc to this purpose; additionally, several of the ESC BMPs described herein are applicable. 11. Protect Existing and Proposed Stormwater Facilities and On-Site BMPs Sedimentation and soil compaction reduce the inflltration capacity of native and engineered soils. Protection measures shall be applied/installed and maintained so as to prevent adverse impacts to existing stormwater facilities and on-site BMPs and areas of proposed stormwater facilities and on- site BMPs for the project. Adverse impacts can prompt the requirement to restore or replace affected stormwater facilities and on-site BMPs. 12. Maintain Protective BMPs Protection measures shall be maintained to ensure continued performance of their intended function, to prevent adverse impacts to existing BMPs/facilities and areas of proposed BMPs/facilities, and protect other disturbed areas of the project. 13. Manage the Project Coordination and timing of site development activities relative to ESC concerns, and timely inspection, maintenance and update of protective measures are necessary to effectively manage the project and ensure the success of protective ESC and SWPPS design and implementation. World Cup Legacy Square – City of Renton 13 8.B STORMWATER POLLUTION PREVENTION AND SPILL CONTROL PLAN DESIGN Stormwater pollution prevention and spill control (SWPPS) measures will be implemented per Section D.2.2 of the RSWDM. • Follow effective pollutant handling and disposal procedures. • Provide cover and containment for materials, fuel and other pollutants. • Manage the project site to maximize pollutant control and minimize pollutant sources. • Protect from spills and drips of petroleum products and other pollutants. • Avoid overapplication or untimely application of chemicals and fertilizers. • Prevent or treat contamination of stormwater runoff by pH modifying sources. 9. BOND QUANTITIES, FACILITY SUMMARIES, AND DECLARATION OF COVENANT As a city-owned public project, flnancial guarantees, including a bond quantities worksheet or declaration of covenants for onsite facilities, are not required. Additionally, fiow control and water quality facilities are not required, so facility summaries have not been provided. 10. OPERATIONS AND MAINTENANCE MANUAL The proposed stormwater structures on-site consist of trench drains for collection and storm drainage pipes for conveyance. A copy of RSWDM “maintenance requirements for stormwater facilities and on-site BMPs” for on-site structures is included in Appendix G. World Cup Legacy Square – City of Renton APPENDIX A – TIR WORKSHEET KIN G COUNTY, WASHINGTON, SURFACE W ATER DE SIGN MANUAL TECHNICAL INFORMATION REPORT (TIR) WORKSHEET 2005 Surface Water Design Manual 1/1/05 1 Part 1 PROJECT OWNER AND PROJECT ENGINEER Part 2 PROJECT LOCATION AND DESCRIPTION Project Owner ________________________ Phone ______________________________ Address ____________________________ ____________________________________ Project Engineer ______________________ Company ___________________________ Phone ______________________________ Project Name _________________________ DDES Permit # ________________________ Location Township ______________ Range ________________ Section ________________ Site Address __________________________ _____________________________________ Part 3 TYPE OF PERMIT APPLICATION Part 4 OTHER REVIEWS AND PERMITS Landuse Services Subdivison / Short Subd. / UPD Building Services M/F / Commerical / 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 (circle): Date (include revision dates): Date of Final: Full / Targeted / Large Site ___________________ ___________________ ___________________ Type (circle one): Date (include revision dates): Date of Final: Full / Modified / Small Site __________________ __________________ __________________ Part 6 ADJUSTMENT APPROVALS Type (circle one): Standard / Complex / Preapplication / Experimental / Blanket Description: (include conditions in TIR Section 2) ____________________________________________________________________________________ ____________________________________________________________________________________ ____________________________________________________________________________________ Date of Approval: ______________________ CITY OF RENTON 425-430-7200 1055 S GRADY WAY RENTON, WA 98058 JUSTIN JOHNSON CITY OF RENTON 425-430-7200 WORLD CUP SQUARE 510 S 3RD STREET X X CIVIL CONSTRUCTION KIN G COUNTY, WASHINGTON, SURFACE W ATER DE SIGN MANUAL TECHNICAL INFORMATION REPORT (TIR) WORKSHEET 2005 Surface Water Design Manual 1/1/05 2 Part 7 MONITORING REQUIREMENTS Monitoring Required: Yes / No Start Date: _______________________ Completion Date: _______________________ Describe: _________________________________ _________________________________________ _________________________________________ _________________________________________ _________________________________________ 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 X X AQUIFER PROTECTION AREA URBAN LAND 0-3%LOW X KIN G COUNTY, WASHINGTON, SURFACE W ATER DE SIGN MANUAL TECHNICAL INFORMATION REPORT (TIR) WORKSHEET 2005 Surface Water Design Manual 1/1/05 3 Part 11 DRAINAGE DESIGN LIMITATIONS REFERENCE Core 2 – Offsite Analysis_________________ Sensitive/Critical Areas___________________ SEPA________________________________ 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 (incl. facility summary sheet) Level: 1 / 2 / 3 or Exemption Number ____________ Small Site BMPs ___________________________________ Conveyance System Spill containment located at: _________________________ Erosion and Sediment Control ESC Site Supervisor: Contact Phone: After Hours Phone: Maintenance and Operation Responsibility: Private / Public If Private, Maintenance Log Required: Yes / No Financial Guarantees and Liability Provided: Yes / No Water Quality (include facility summary sheet) Type: Basic / Sens. Lake / Enhanced Basicm / 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: Major / Minor / Exemption / None 100-year Base Flood Elevation (or range): ______________ Datum: Flood Protection Facilities Describe: Source Control (comm./industrial landuse) Describe landuse: Describe any structural controls: SHEET FLOW 2/14/2025 MODIFIED LEVEL 1 <0.15 CFS NOT FEASIBLE N/A PUBLIC PROJECT LESS THAN 5,000SF PGIS N/A N/A N/A PUBLIC SQUARE KIN G COUNTY, WASHINGTON, SURFACE W ATER DE SIGN MANUAL TECHNICAL INFORMATION REPORT (TIR) WORKSHEET 2005 Surface Water Design Manual 1/1/05 4 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 Control Dust Control Construction Sequence 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 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 Small Site BMPs Other ________________ ________________ ________________ ________________ ________________ ________________ Biofiltration Wetpool Media Filtration Oil Control Spill Control Small Site BMPs Other ________________ ________________ ________________ ________________ ________________ ________________ ________________ X X X X X X X X X XN/A N/A N/A N/A KIN G COUNTY, WASHINGTON, SURFACE W ATER DE SIGN MANUAL TECHNICAL INFORMATION REPORT (TIR) WORKSHEET 2005 Surface Water Design Manual 1/1/05 5 Part 15 EASEMENTS/TRACTS Part 16 STRUCTURAL ANALYSIS Drainage Easement Access Easement 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 World Cup Legacy Square – City of Renton 1 APPENDIX B – EXISTING AND DEVELOPED CONDITIONS MAPS S 3RD STS 3RD ST••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••LOGAN AVE SGATEWAYPARK RENTON PAVILIONEVENTS CENTERPIAZZAPARKPROJECT LIMITSROWSPU PROPERTY LIMITSSPU PROPERTY LIMITSSTAGE AREA TO BECONSTRUCTED AT ALATER PHASE, SEEPHASING NOTE 13HOR: 1"=20' FEBRUARY 2025XXX-XX-XXXXXX SURVEYOR XXTS, ECTS, EC, BD,JTJJ.T. JOHNSON, G. ESTEPCITY OF RENTONVERTICAL: NAVD 1988HORIZONTAL: NAD 1983/19911-800-424-5555 or 811UNDERGROUND SERVICECall 48 HoursBefore You DigPRELIMINARYNOT FORCONSTRUCTIONNO.BYDATEREVISION COMMENTSAPPR80% DESIGNXXWorld Cup SquareCommunity & Economic Development,Public Works, Parks & RecreationNEXISTING CONDITIONSG3.0PHASING NOTES1.STAGE AREA TO BE CONSTRUCTED DURING PHASE 2 AND IS NOTIN CONTRACT. ALL REFERENCES TO THE STAGE SHOWN IN THEPLANS ARE BASED ON CONCEPTUAL PURPOSES ONLY.2.PHASE 2 CONSTRUCTION ALSO INCLUDES: FENCING ELEMENTS,TRASH RECEPTACLES, BOLLARDS, BIKE RACKS, AND OTHER URBANFEATURES. THESE ELEMENTS ARE NOT IN CONTRACT AND WILL BECONSTRUCTED AT A LATER DATE.SURVEY NOTES:1.THE LOCATIONS OF EXISTING UNDERGROUND UTILITY SYSTEMS, ASSHOWN HEREON, ARE TAKEN FROM UTILITY LOCATE PAINT MARKSOR AS-BUILT PLANS AND ARE SHOWN IN AN APPROXIMATE WAYONLY.THE CONTRACTOR SHALL DETERMINE THE EXACT LOCATION OF ALLEXISTING UTILITIES BEFORE COMMENCING WORK, AND AGREES TOBE FULLY RESPONSIBLE FOR ANY AND ALL DAMAGES WHICH MIGHTBE OCCASIONED BY THE CONTRACTOR'S FAILURE TO EXACTLY LOCATE AND PRESERVE ANY AND ALL UNDERGROUND UTILITIES.ALL LOCATOR SERVICES SHOULD BE CONTACTED PRIOR TO ANYCONSTRUCTION OR SUBSURFACE EXPLORATION. CALL 1-800-424-5555.2.FIELD SURVEY: KPG, NOVEMBER, 2017 - FEBRUARY, 2018;SEPTEMBER 2018 - DECEMBER 2018; FEBRUARY 2019; MAY 2019;NOVEMBER 2019; FEBRUARY 2020; APRIL 2020; JANUARY 2021,SEPTEMBER 2023.3.CONTOUR INTERVAL = 1 FOOT.4.STORM AND SEWER CONNECTIONS HAVE BEEN DRAWN FROMCENTER OF LID TO CENTER OF LID.5.THE LOCATIONS AND DIMENSIONS OF UNDERGROUND VAULTSHAVE NOT BEEN VERIFIED AND ARE APPROXIMATE.HORIZONTAL DATUMWASHINGTON STATE PLANE COORDINATE SYSTEM, NORTH ZONE, NAD83/91 PER CITY OF RENTON CONTROL STATIONS 205, 884, 1140, AND1896.VERTICAL DATUMNAVD 88, PER CITY OF RENTON CONTROL STATIONS 2123 AND 2128.LEGENDSEE NOTES ON SHEET 2 UNLESS OTHERWISE NOTED BELOW.PROPERTY LINEAPPROX LIMITS OF WORKAPPROX LIMITS OF FUTURE PHASE27,88 2. 15 s f 223.38 s f 171.67 sf 2,40 3 .3 3 sf 171.3 3 s f 560 . 43 s f 17,079.12 sf EXISTING CONDITIONS PERVIOUS, LANDSCAPING 3,530 SF (0.081 ACRES)IMPERVIOUS, SIDEWALK 7,290 SF (0.167 ACRES)IMPERVIOUS, GRAVEL LOT 17,080 SF (0.392 ACRES)TOTAL AREA 27,900 SF (0.640 ACRES)SITE BOUNDARY LOGAN AVE SS 3RD ST#1, 34.84'#2, 35.20'#3, 35.00'#4, 34.91'#5, 34.85'#6, 35.23'#8, 35.03'#9, 35.34'#10, 35.56'#11, 36.10'#12, 36.00'#13, 36.10'#14, 34.82'#15, 34.90'#16, 35.35'#17, 35.15'#18, 35.09'#20, 34.95'#21, 34.97'#22, 35.36'#23, 35.48'#24, 35.15'#27, 35.23'#42, 36.63'#43, 36.37'#44, 35.17'#45, 34.99'#25, 35.16'#47, 35.72'#48, 35.66'#49, 35.76'#50, 35.68'#51, 35.90'#52, 35.90'#54, 35.68'#55, 35.76'#56, 35.66'#57, 35.72'#58, 35.25'#59, 35.44'#60, 35.46'#61, 35.46'#62, 35.37'#63, 35.19'#64, 35.46'#65, 35.51'#66, 35.43'#67, 35.25'#68, 35.35'#69, 35.27'#70, 35.09'#71, 35.17'#72, 35.05'#73, 35.02'#74, 34.95'#75, 34.83'#76, 34.96'#82, 34.87'#83, 34.82'#86, 35.56'#87, 35.39'#88, 35.42'#89, 35.59'#90, 35.65'#91, 35.76'#92, 35.80'#93, 35.83'#94, 35.96'#95, 35.90'#96, 35.90'#97, 36.15'#98, 36.50'#99, 36.54'#100, 36.19'#101, 35.77'#102, 35.75'#103, 35.71'#104, 35.55'#105, 35.35'#146, 0.00'#147, 36.91'#148, 36.89'#149, 36.69'#150, 36.78'#151, 37.02'#152, 36.90'#153, 36.96'#154, 36.97'MATCH EXTBC, TYP.MATCH EXTBC, TYP.MATCH EXTBC, TYP.MATCHEX CONCMATCH EXTBC, TYP.TRENCH DRAIN, SEEUTILITY SHEETS & DETAILSTRENCH DRAIN,SEE UTILITYSHEETS & DETAILS12.00'PITCH AND ADJACENTSIDEWALK SLOPE TOTRENCH DRAIN3535353535 36373838373 8 3637373737TOP CONC WALLEL = 38.90'TOP CONC WALLEL = 38.90'TOP CONC WALLEL = 37.40'TOP CONC WALLEL = 37.40'LIGHTING BASE AREAEL = 36.63'0.50%0.50%1.50% 1.50%1.10%0.71%0.89%1.80%2.46%1.48%1.50%4.40%3.00 %4.10%4.5 5 % 1.38%1.77%1.47%1.45%1.3 5 %1.14%1.54%1.76%MATCH EX ASPHALTPAVING, TYP.MATCH EX ASPHALTPAVING, TYP.MATCH EX ASPHALTPAVING, TYP.MATCH EX CONCMATCH EX ASPHALTPAVING, TYP.12.00'12.00'4.00'CONC STAIRSCONC STAIRSCONC STAIRSCONC STAIRSCONC STAIRSTRENCH DRAINAT LOW POINTSLOPE CORNER TO DRAINTO TRENCH DRAIN, TYP.2.04%CONC SIDEWALKCROSS SLOPE = 1.5%, TYP.CONC SIDEWALKCROSS SLOPE = 1.5%, TYP.CONC SIDEWALKCROSS SLOPE = 1.5%, TYP.CONC SIDEWALKCROSS SLOPE = 1.5%, TYP.CONC SIDEWALKCROSS SLOPE = 1.5%, TYP.DRAININLETATLOWPOINT1.50%0.25%TRENCH DRAIN GRATEHIGH POINT, 35.25'8.00'1.50%0.97%ACCESS ROADCROSS SLOPE = 1.5%, TYP.1.00%1.39%STEP IN WALL37.40' TO 38.90'STEP IN WALL37.40' TO 38.90'PLANTERAREA, TYP.0.50%0.50%4.20%#7, 35.36'323211222LIGHTINGBASE AREAEL = 35.98'LIGHTING BASE AREAEL = 35.79'LIGHTINGBASE AREAEL = 35.99'#26, 35.24'#53, 35.88'0.76%1.81%1.59%1.49%#183, 36.79'#184, 36.62'#185, 36.44'#186, 36.20'#187, 36.44'#188, 36.63'#189, 36.63'#190, 36.57'#191, 36.73'#192, 36.78'#193, 36.87'2.29%1.50%1.50%1.50%TOP CONC WALLEL = 38.90'7TOP CONC WALLEL = 38.90'7MATCH EX ASPHALTPAVING, TYP.MATCH EX ASPHALTPAVING, TYP.MATCH EX ASPHALTPAVING, TYP.7HOR: 1"=10' FEBRUARY 2025XXX-XX-XXXXXX SURVEYOR XXTS, ECTS, EC, BD,JTJJ.T. JOHNSON, G. ESTEPCITY OF RENTONVERTICAL: NAVD 1988HORIZONTAL: NAD 1983/19911-800-424-5555 or 811UNDERGROUND SERVICECall 48 HoursBefore You DigPRELIMINARYNOT FORCONSTRUCTIONNO.BYDATEREVISION COMMENTSAPPR80% DESIGNXXWorld Cup SquareCommunity & Economic Development,Public Works, Parks & RecreationNGRADING PLANC2.0MATCH LINE AMATCH LINE BSANITARY SEWER CONNECTIONSTORM DRAIN CONNECTIONMATCH LINE ASTORM DRAIN CONNECTIONMATCH LINE BSANITARY SEWER CONNECTION LEGENDSEE NOTES ON SHEET G2.0 UNLESS OTHERWISE NOTED BELOW.PROPERTY LINEAPPROX LIMITS OF WORKMAJOR CONTOURMINOR CONTOURGRADING POINT NOTES1.SEE SHEET C2.3 GRADING POINT TABLE2.PROPOSED CONTOURS ARE APPROXIMATE. CONTRACTOR TOMATCH CONTOURS TO EXISTING GRADE ALONG PROJECTBOUNDARIES3.SEE SHEET C3.2 FOR UTILITY DETAILSPOINT NUMBERELEVATION#XX, XX.XX'NORTH CURB AREAGRADING PLAN ENLARGEMENTS 3RD ST ACCESS GRADINGPLAN ENLARGEMENTUPPER AND PLAY AREAGRADING PLAN ENLARGEMENT1C2.11C2.22C2.2GRADING KEY NOTESFUTSAL COURT CONC WALL PER DETAIL 6 ON SHEET L1.1CONC STAIRS PER DETAIL 4 ON SHEET L1.2FUTSAL COURT CONC SEAT WALL PER DETAIL 1 ON SHEET L1.1PLANTER CONC SEAT WALL AND CONC BENCH PER DETAIL 4 ONSHEET L1.1SINGLE SIDE SEATING CONC BENCH PER DETAIL 5 ON SHEETL1.1PLAY AREA CONC WALL PER DETAIL 7 ON SHEET L1.1VIEWING AREA CONC WALL PER DETAIL 8 ON SHEET L1.112345671,227.61 sf 560.6 8 s f 626 s f 484.5 6 s f2,433.74 sf 2,440.06 sf 241.2 s f 27,76 2. 81 s f DEVELOPED CONDITIONS PERVIOUS, LANDSCAPING 1,910 SF (0.043 ACRES)IMPERVIOUS, ROOFTOP-STAGE 1,230 SF (0.028 ACRES)IMPERVIOUS, SIDEWALK 19,770 SF (0.454 ACRES)IMPERVIOUS, PARKING 4,990 SF (0.115 ACRES)TOTAL AREA 27,900 SF (0.640 ACRES)SITE BOUNDARYDEVELOPED CONDITIONS World Cup Legacy Square – City of Renton 2 APPENDIX C – CIVIL TESC PLAN S 3RD STLOGAN AVE S2CITY TO REMOVE ALL CITY OWNEDMOBILE FACILITIES FROM SITEPRIOR TO CONSTRUCTION.PROTECT EX SPU FACILITIESAND CONC FOUNDATIONREMOVE EX TREE, TYP.EX JBOXES & PEDESTALEX BOULDER FREMOVE EXBOLLARDSALVAGE & STORE EX METAL FENCINGFOR REUSE IMMEDIATELY PRIOR TOINSTALLATION OF NEW SIDEWALK OR ASNECESSARY FOR CONSTRUCTION.PROTECT EX CURBTO REMAIN, TYP.PROTECT EX CURBTO REMAIN, TYP.PROTECT EX CURBTO REMAIN, TYP.EX LIGHT POLE AND JBOXTO REMAIN. PROTECT ANDRESET TO FINISHED GRADE.EX WATER METERSTO REMAIN.PROTECT AND RESETTO FINISHED GRADEPROTECT EX BUILDINGPROTECT EXCONC SIDEWALKTO REMAIN, TYP.PROTECT EXBIKE RACKPROTECT EX CONCSIDEWALK TO REMAIN, TYP.PROTECT EXCONC SIDEWALKTO REMAIN, TYP.1EX BOULDER E1EX BOULDER D1EX BOULDER C1EX BOULDER B1EX BOULDER A1EX LIGHT POLEE1EX LIGHT POLEE1EX LIGHT POLEE1EX LIGHT POLEE1E1EX IRRIGATION BOXES/VALVESI1EX PARKING SIGN1EX PARKING SIGN1SALVAGE & STORE EX METAL FENCINGFOR REUSE IMMEDIATELY PRIOR TOINSTALLATION OF NEW SIDEWALK OR ASNECESSARY FOR CONSTRUCTION.EX TRASH CAN1EX TRASH CAN1PROTECT EX CURBTO REMAIN, TYP.PROTECT EX CURBTO REMAIN, TYP.PROTECT EX CURBTO REMAIN, TYP.SALVAGE & STORE EX METAL FENCINGFOR REUSE IMMEDIATELY PRIOR TOINSTALLATION OF NEW SIDEWALK OR ASNECESSARY FOR CONSTRUCTION.PROTECT EXCONC SIDEWALKTO REMAIN, TYP.PROTECT EX TREETO REMAIN, TYP.PROTECT EX TREETO REMAIN, TYP.PROTECT EX TREETO REMAIN, TYP.PROTECT EX TREETO REMAIN, TYP.PROTECT EX TREETO REMAIN, TYP.PROTECT EX CONCSIDEWALK TO REMAIN, TYP.PROTECT EX TREETO REMAIN, TYP.PROTECT EX TREETO REMAIN, TYP.2PROTECT EXCONC SIDEWALKTO REMAIN, TYP.EX LIGHT POLE AND JBOXTO REMAIN. PROTECT ANDRESET TO FINISHED GRADE.REMOVE EXBOLLARD3INSTALL CHAINLINKFENCE AROUNDPERIMETER, ADJUSTAS REQ'D DURINGCONSTRUCITON TYP.INSTALL CHAINLINK FENCE AROUNDPERIMETER, ADJUST AS REQ'DDURING CONSTRUCITON TYP.INSTALL CHAINLINK FENCE AROUNDPERIMETER, ADJUST AS REQ'DDURING CONSTRUCITON TYP.REMOVEEX PAINTEX PARKING SIGN1EX JBOX TO REMAIN.PROTECT AND RESET TOFINISHED GRADE.EX GAS VALVE TO REMAIN.PROTECT AND RESET TOFINISHED GRADE.4HOR: 1"=10' FEBRUARY 2025XXX-XX-XXXXXX SURVEYOR XXTS, ECTS, EC, BD,JTJJ.T. JOHNSON, G. ESTEPCITY OF RENTONVERTICAL: NAVD 1988HORIZONTAL: NAD 1983/19911-800-424-5555 or 811UNDERGROUND SERVICECall 48 HoursBefore You DigPRELIMINARYNOT FORCONSTRUCTIONNO.BYDATEREVISION COMMENTSAPPR80% DESIGNXXWorld Cup SquareCommunity & Economic Development,Public Works, Parks & RecreationNTESC AND DEMOLITION PLAND1.0MATCH LINE AMATCH LINE BSANITARY SEWER CONNECTIONSTORM DRAIN CONNECTIONMATCH LINE ASTORM DRAIN CONNECTIONMATCH LINE BSANITARY SEWER CONNECTIONDEMOLITION KEY NOTESSALVAGE AND STORE FOR REUSE.REMOVE EXISTING CATCH BASIN AND STORM DRAINAGE LINESWITHIN THE CONSTRUCTION AREA, CAP ALL LINESABANDONED IN PLACE AND NOT REMOVED AND NOTE THEPRECISE LOCATION ON THE RECORD DRAWINGS.REMOVE EX STAIRS, RAILINGS, AND CONC SEATING (INCLUDINGANY FOOTINGS)123IRRIGATION DEMOLITION NOTESSALVAGE AND STORE ALL EX IRRIGATION HEADS, VALVES, &SPRAY BODIES FOR REUSE WITHIN THE IMPROVED AREA. CUT,CAP AND ABANDON IN PLACE OR REMOVE EX IRRIGATION LINESENCOUNTERED AS REQUIRED FOR NEW CONSTRUCTION(SEE IRRIGATION PLANS FOR NEW IRRIGATION ANDCONNECTION LOCATIONS TO EX IRRIGATION SYSTEM).CAP ALL EXPOSED ENDS.I1ELECTRICAL DEMOLITION NOTESSALVAGE AND STORE EX LIGHT POLES AND JBOXES AS NOTED. CUT,CAP AND ABANDON IN PLACE OR REMOVE EX ELECTRICAL CONDUITLINES ENCOUNTERED AS REQUIRED FOR NEW CONSTRUCTION (SEEELECTRICAL PLANS FOR ADDITIONAL INFORMATION).E1DEMOLITION, CLEARING, & TESC LEGENDSEE NOTES ON SHEET G2.0 UNLESS OTHERWISE NOTED BELOW.PROPERTY LINEAPPROX LIMITS OF WORK6' HIGH TEMPORARY CHAIN LINK CONSTRUCTION/TREEPROTECTION FENCE WITH CONCRETE SHOESINLET PROTECTION, SEE COR STD. PLAN 216.30EXISTING TREE TO REMAIN WITH APPROX. CRITICAL ROOT ZONEEXISTING TREE TO BE REMOVEDSAWCUT LOCATIONASPHALT PAVING TO BE REMOVED, SAWCUT EDGES AS REQ'D(NOTE: PROTECT EX PAVING THAT IS TO REMAIN)CONCRETE PAVING/SIDEWLAK TO BE REMOVED,SAWCUT EDGES AS REQ'D(NOTE: PROTECT EX CONC PAVING/SIDEWALK THAT IS TO REMAIN)CURB TO BE REMOVED, SAWCUT EDGES AS REQ'D(NOTE: PROTECT EX CURB THAT IS TO REMAIN) World Cup Legacy Square – City of Renton 3 APPENDIX D – CRITICAL AREAS MAPS 2,257 188 Aquifer Protection Area Map Legend 128064 Feet Notes 128 WGS_1984_Web_Mercator_Auxiliary_Sphere All data, information, and maps are provided "as is" without warranty or any representation of accuracy, timeliness of completeness. The burden for determining accuracy, completeness, timeliness, merchantability and fitness for or the appropriateness for use rests solely on the user. City and County Labels Addresses Parcels City and County Boundary Renton <all other values> Wellhead Protection Area Zones Zone 1 Zone 1 Modified Zone 2 Streets 2023.sid Red: Band_1 Green: Band_2 Blue: Band_3 2,257 188 Shoreline, Stream, & Wetland Map Legend 128064 Feet Notes 128 WGS_1984_Web_Mercator_Auxiliary_Sphere All data, information, and maps are provided "as is" without warranty or any representation of accuracy, timeliness of completeness. The burden for determining accuracy, completeness, timeliness, merchantability and fitness for or the appropriateness for use rests solely on the user. City and County Labels Addresses Parcels City and County Boundary Renton <all other values> Environment Designations Natural Shoreline High Intensity Shoreline Isolated High Intensity Shoreline Residential Urban Conservancy Jurisdictions Streams (Classified) S - Shoreline F - Fish Np - Non-Fish Ns - Non-Fish Seasonal Unclassfied Wetlands Streets 2023.sid Red: Band_1 Green: Band_2 Blue: Band_3 2,257 188 Regulated Slopes, Landslide, & Erosion Map Legend 128064 Feet Notes 128 WGS_1984_Web_Mercator_Auxiliary_Sphere All data, information, and maps are provided "as is" without warranty or any representation of accuracy, timeliness of completeness. The burden for determining accuracy, completeness, timeliness, merchantability and fitness for or the appropriateness for use rests solely on the user. City and County Labels Addresses Parcels City and County Boundary Renton <all other values> Erosion Hazard - High Landslide Very High High Moderate Unclassified Slope City of Renton >15% & <=25% >25% & <=40% (Sensitive) >40% & <=90% (Protected) >90% (Protected) Streets 2023.sid Red: Band_1 Green: Band_2 Blue: Band_3 2,257 188 Coal Mine Hazard Map Legend 128064 Feet Notes 128 WGS_1984_Web_Mercator_Auxiliary_Sphere All data, information, and maps are provided "as is" without warranty or any representation of accuracy, timeliness of completeness. The burden for determining accuracy, completeness, timeliness, merchantability and fitness for or the appropriateness for use rests solely on the user. City and County Labels Addresses Parcels City and County Boundary Renton <all other values> Coalmines High Moderate Unclassified Streets 2023.sid Red: Band_1 Green: Band_2 Blue: Band_3 2,257 188 Seismic Area Map Legend 128064 Feet Notes 128 WGS_1984_Web_Mercator_Auxiliary_Sphere All data, information, and maps are provided "as is" without warranty or any representation of accuracy, timeliness of completeness. The burden for determining accuracy, completeness, timeliness, merchantability and fitness for or the appropriateness for use rests solely on the user. City and County Labels Addresses Parcels City and County Boundary Renton <all other values> Seismic Hazard Areas Faults Streets 2023.sid Red: Band_1 Green: Band_2 Blue: Band_3 2,257 188 Flood Map Legend 128064 Feet Notes 128 WGS_1984_Web_Mercator_Auxiliary_Sphere All data, information, and maps are provided "as is" without warranty or any representation of accuracy, timeliness of completeness. The burden for determining accuracy, completeness, timeliness, merchantability and fitness for or the appropriateness for use rests solely on the user. City and County Labels Addresses Parcels City and County Boundary Renton <all other values> Floodway Special Flood Hazard Areas (100 year flood) Streets 2023.sid Red: Band_1 Green: Band_2 Blue: Band_3 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 FLOODHAZARD AREAS Without Base Flood Elevation (BFE)Zone A, V, A99With BFE or Depth Zone AE, AO, AH, VE, AR Regulatory Floodway 0.2% Annual Chance Flood Hazard, Areasof 1% annual chance flood with averagedepth less than one foot or with drainageareas of less than one square mile Zone X Future Conditions 1% Annual Chance Flood Hazard Zone 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 Hazard Zone 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 basemapaccuracy standards The flood hazard information is derived directly from theauthoritative NFHL web services provided by FEMA. This mapwas exported on 2/18/2025 at 4:03 AM and does notreflect changes or amendments subsequent to this date andtime. The NFHL and effective information may change orbecome 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 approximatepoint selected by the user and does not representan authoritative property location. 1:6,000 122°12'55"W 47°29'N 122°12'18"W 47°28'36"N Basemap Imagery Source: USGS National Map 2023 World Cup Legacy Square – City of Renton 4 APPENDIX E – WWHM MODELING RESULTS WWHM2012 PROJECT REPORT WorldCup_WWHM 2/17/2025 12:31:05 PM Page 2 General Model Information Project Name:WorldCup_WWHM Site Name: Site Address: City: Report Date:2/17/2025 Gage:Seatac Data Start:1948/10/01 00:00 Data End:2009/09/30 00:00 Timestep:15 Minute Precip Scale:1.000 Version Date:2021/08/18 Version:4.2.18 POC Thresholds Low Flow Threshold for POC1:50 Percent of the 2 Year High Flow Threshold for POC1:50 Year Low Flow Threshold for POC2:50 Percent of the 2 Year High Flow Threshold for POC2:50 Year WorldCup_WWHM 2/17/2025 12:31:05 PM Page 3 Landuse Basin Data Predeveloped Land Use Basin 1 Bypass:No GroundWater:No Pervious Land Use acre C, Lawn, Mod 0.081 Pervious Total 0.081 Impervious Land Use acre SIDEWALKS FLAT 0.167 PARKING FLAT 0.392 Impervious Total 0.559 Basin Total 0.64 Element Flows To: Surface Interflow Groundwater WorldCup_WWHM 2/17/2025 12:31:05 PM Page 4 Fusal-Exist Bypass:No GroundWater:No Pervious Land Use acre Pervious Total 0 Impervious Land Use acre DRIVEWAYS FLAT 0.103 Impervious Total 0.103 Basin Total 0.103 Element Flows To: Surface Interflow Groundwater WorldCup_WWHM 2/17/2025 12:31:05 PM Page 5 Mitigated Land Use Basin 1 Bypass:No GroundWater:No Pervious Land Use acre C, Lawn, Mod 0.043 Pervious Total 0.043 Impervious Land Use acre ROOF TOPS FLAT 0.028 SIDEWALKS FLAT 0.454 PARKING FLAT 0.115 Impervious Total 0.597 Basin Total 0.64 Element Flows To: Surface Interflow Groundwater WorldCup_WWHM 2/17/2025 12:31:05 PM Page 6 Fusal-Conveyance Bypass:No GroundWater:No Pervious Land Use acre Pervious Total 0 Impervious Land Use acre DRIVEWAYS FLAT 0.103 Impervious Total 0.103 Basin Total 0.103 Element Flows To: Surface Interflow Groundwater WorldCup_WWHM 2/17/2025 12:31:05 PM Page 7 Routing Elements Predeveloped Routing WorldCup_WWHM 2/17/2025 12:31:05 PM Page 8 Mitigated Routing WorldCup_WWHM 2/17/2025 12:31:05 PM Page 9 Analysis Results POC 1 + Predeveloped x Mitigated Predeveloped Landuse Totals for POC #1 Total Pervious Area:0.081 Total Impervious Area:0.559 Mitigated Landuse Totals for POC #1 Total Pervious Area:0.043 Total Impervious Area:0.597 Flow Frequency Method:Log Pearson Type III 17B Flow Frequency Return Periods for Predeveloped. POC #1 Return Period Flow(cfs) 2 year 0.219317 5 year 0.279198 10 year 0.320128 25 year 0.373472 50 year 0.414469 100 year 0.456599 Flow Frequency Return Periods for Mitigated. POC #1 Return Period Flow(cfs) 2 year 0.230914 5 year 0.292787 10 year 0.334949 25 year 0.389766 50 year 0.431806 100 year 0.474935 Annual Peaks Annual Peaks for Predeveloped and Mitigated. POC #1 Year Predeveloped Mitigated 1949 0.291 0.303 1950 0.301 0.320 1951 0.181 0.189 1952 0.154 0.164 1953 0.167 0.178 1954 0.179 0.188 1955 0.201 0.212 1956 0.198 0.209 1957 0.229 0.239 1958 0.181 0.191 THE DIFFERENCE BETWEEN THE EXISTING AND DEVELOPMETN 100-YEAR, 15-MINUTE STORM EVENT IS 0.018 CFS , WHICH IS LESS THAN 0.15 CFS, THEREFORE, NO FLOW CONTROL REQUIRED. MAXIMUM FLOW TO ANY 8-INCH SERVICE LINE WITHIN SITE. SEE APPENDIX F FOR ADDITIONAL CONVEYANCE ANALYSIS. WorldCup_WWHM 2/17/2025 12:31:44 PM Page 10 1959 0.181 0.193 1960 0.186 0.194 1961 0.194 0.203 1962 0.165 0.175 1963 0.188 0.197 1964 0.179 0.190 1965 0.236 0.247 1966 0.154 0.163 1967 0.268 0.282 1968 0.305 0.321 1969 0.215 0.225 1970 0.205 0.215 1971 0.245 0.257 1972 0.259 0.269 1973 0.148 0.158 1974 0.225 0.236 1975 0.249 0.266 1976 0.174 0.182 1977 0.181 0.194 1978 0.223 0.237 1979 0.305 0.325 1980 0.290 0.300 1981 0.228 0.241 1982 0.326 0.342 1983 0.259 0.275 1984 0.166 0.175 1985 0.228 0.240 1986 0.195 0.207 1987 0.300 0.319 1988 0.180 0.193 1989 0.225 0.241 1990 0.413 0.423 1991 0.325 0.336 1992 0.164 0.173 1993 0.140 0.149 1994 0.150 0.161 1995 0.202 0.213 1996 0.222 0.231 1997 0.213 0.223 1998 0.210 0.223 1999 0.444 0.463 2000 0.218 0.229 2001 0.234 0.248 2002 0.284 0.296 2003 0.222 0.231 2004 0.414 0.432 2005 0.188 0.197 2006 0.168 0.175 2007 0.388 0.405 2008 0.319 0.329 2009 0.276 0.294 Ranked Annual Peaks Ranked Annual Peaks for Predeveloped and Mitigated. POC #1 Rank Predeveloped Mitigated 1 0.4439 0.4630 2 0.4136 0.4323 3 0.4133 0.4234 WorldCup_WWHM 2/17/2025 12:31:44 PM Page 11 4 0.3882 0.4049 5 0.3263 0.3419 6 0.3253 0.3356 7 0.3190 0.3295 8 0.3054 0.3251 9 0.3054 0.3211 10 0.3008 0.3199 11 0.3003 0.3190 12 0.2910 0.3028 13 0.2899 0.3002 14 0.2836 0.2956 15 0.2757 0.2943 16 0.2678 0.2820 17 0.2592 0.2749 18 0.2589 0.2687 19 0.2489 0.2658 20 0.2447 0.2571 21 0.2361 0.2483 22 0.2335 0.2467 23 0.2287 0.2409 24 0.2284 0.2408 25 0.2281 0.2404 26 0.2255 0.2392 27 0.2254 0.2373 28 0.2226 0.2357 29 0.2222 0.2308 30 0.2220 0.2306 31 0.2182 0.2290 32 0.2148 0.2245 33 0.2135 0.2229 34 0.2101 0.2226 35 0.2049 0.2154 36 0.2021 0.2134 37 0.2015 0.2125 38 0.1980 0.2090 39 0.1952 0.2071 40 0.1937 0.2035 41 0.1883 0.1974 42 0.1883 0.1972 43 0.1861 0.1939 44 0.1814 0.1937 45 0.1807 0.1928 46 0.1806 0.1925 47 0.1806 0.1909 48 0.1803 0.1905 49 0.1789 0.1885 50 0.1788 0.1880 51 0.1740 0.1823 52 0.1677 0.1775 53 0.1668 0.1755 54 0.1656 0.1749 55 0.1653 0.1745 56 0.1641 0.1729 57 0.1544 0.1643 58 0.1543 0.1631 59 0.1505 0.1607 60 0.1481 0.1581 61 0.1404 0.1488 WorldCup_WWHM 2/17/2025 12:31:44 PM Page 12 WorldCup_WWHM 2/17/2025 12:31:44 PM Page 13 Duration Flows Flow(cfs)Predev Mit Percentage Pass/Fail 0.1097 1767 2182 123 Fail 0.1127 1610 1974 122 Fail 0.1158 1460 1786 122 Fail 0.1189 1321 1637 123 Fail 0.1220 1196 1479 123 Fail 0.1251 1058 1306 123 Fail 0.1281 964 1200 124 Fail 0.1312 890 1087 122 Fail 0.1343 821 997 121 Fail 0.1374 752 922 122 Fail 0.1404 695 857 123 Fail 0.1435 636 792 124 Fail 0.1466 595 731 122 Fail 0.1497 553 676 122 Fail 0.1528 512 623 121 Fail 0.1558 471 584 123 Fail 0.1589 436 546 125 Fail 0.1620 395 490 124 Fail 0.1651 372 453 121 Fail 0.1682 350 425 121 Fail 0.1712 324 395 121 Fail 0.1743 303 376 124 Fail 0.1774 283 346 122 Fail 0.1805 262 324 123 Fail 0.1836 244 306 125 Fail 0.1866 228 283 124 Fail 0.1897 213 268 125 Fail 0.1928 201 248 123 Fail 0.1959 190 233 122 Fail 0.1989 177 216 122 Fail 0.2020 162 203 125 Fail 0.2051 149 188 126 Fail 0.2082 142 179 126 Fail 0.2113 134 168 125 Fail 0.2143 125 158 126 Fail 0.2174 118 147 124 Fail 0.2205 111 137 123 Fail 0.2236 106 133 125 Fail 0.2267 100 124 124 Fail 0.2297 94 114 121 Fail 0.2328 85 109 128 Fail 0.2359 82 105 128 Fail 0.2390 80 101 126 Fail 0.2421 76 90 118 Fail 0.2451 72 88 122 Fail 0.2482 67 82 122 Fail 0.2513 61 77 126 Fail 0.2544 61 73 119 Fail 0.2574 58 69 118 Fail 0.2605 54 65 120 Fail 0.2636 52 64 123 Fail 0.2667 51 60 117 Fail 0.2698 48 57 118 Fail 0.2728 46 55 119 Fail WorldCup_WWHM 2/17/2025 12:31:44 PM Page 14 0.2759 43 52 120 Fail 0.2790 39 52 133 Fail 0.2821 37 48 129 Fail 0.2852 34 46 135 Fail 0.2882 32 45 140 Fail 0.2913 29 40 137 Fail 0.2944 26 38 146 Fail 0.2975 25 33 132 Fail 0.3005 24 32 133 Fail 0.3036 21 30 142 Fail 0.3067 16 28 175 Fail 0.3098 16 24 150 Fail 0.3129 16 24 150 Fail 0.3159 15 22 146 Fail 0.3190 12 21 175 Fail 0.3221 11 17 154 Fail 0.3252 10 15 150 Fail 0.3283 8 13 162 Fail 0.3313 8 11 137 Fail 0.3344 8 11 137 Fail 0.3375 8 9 112 Fail 0.3406 8 9 112 Fail 0.3437 8 8 100 Pass 0.3467 8 8 100 Pass 0.3498 8 8 100 Pass 0.3529 8 8 100 Pass 0.3560 8 8 100 Pass 0.3590 8 8 100 Pass 0.3621 8 8 100 Pass 0.3652 8 8 100 Pass 0.3683 6 8 133 Fail 0.3714 6 8 133 Fail 0.3744 6 8 133 Fail 0.3775 6 7 116 Fail 0.3806 6 7 116 Fail 0.3837 6 7 116 Fail 0.3868 6 6 100 Pass 0.3898 5 6 120 Fail 0.3929 4 6 150 Fail 0.3960 4 6 150 Fail 0.3991 4 6 150 Fail 0.4022 3 6 200 Fail 0.4052 3 5 166 Fail 0.4083 3 5 166 Fail 0.4114 3 4 133 Fail 0.4145 1 4 400 Fail The development has an increase in flow durations from 1/2 Predeveloped 2 year flow to the 2 year flow or more than a 10% increase from the 2 year to the 50 year flow. The development has an increase in flow durations for more than 50% of the flows for the range of the duration analysis. WorldCup_WWHM 2/17/2025 12:31:44 PM Page 15 Water Quality Water Quality BMP Flow and Volume for POC #1 On-line facility volume:0.0745 acre-feet On-line facility target flow:0.0966 cfs. Adjusted for 15 min:0.0966 cfs. Off-line facility target flow:0.0545 cfs. Adjusted for 15 min:0.0545 cfs. WorldCup_WWHM 2/17/2025 12:31:44 PM Page 16 LID Report WorldCup_WWHM 2/17/2025 12:32:21 PM Page 17 POC 2 + Predeveloped x Mitigated Predeveloped Landuse Totals for POC #2 Total Pervious Area:0 Total Impervious Area:0.103 Mitigated Landuse Totals for POC #2 Total Pervious Area:0 Total Impervious Area:0.103 Flow Frequency Method:Log Pearson Type III 17B Flow Frequency Return Periods for Predeveloped. POC #2 Return Period Flow(cfs) 2 year 0.03927 5 year 0.049603 10 year 0.056623 25 year 0.06573 50 year 0.072699 100 year 0.079838 Flow Frequency Return Periods for Mitigated. POC #2 Return Period Flow(cfs) 2 year 0.03927 5 year 0.049603 10 year 0.056623 25 year 0.06573 50 year 0.072699 100 year 0.079838 Annual Peaks Annual Peaks for Predeveloped and Mitigated. POC #2 Year Predeveloped Mitigated 1949 0.051 0.051 1950 0.055 0.055 1951 0.032 0.032 1952 0.028 0.028 1953 0.031 0.031 1954 0.032 0.032 1955 0.036 0.036 1956 0.036 0.036 1957 0.040 0.040 1958 0.033 0.033 1959 0.033 0.033 MAXIMUM FLOW TO 4-INCH TRENCH DRAINS ONSITE. SEE APPENDIX F FOR ADDITIONAL CONVEYANCE ANALYSIS. WorldCup_WWHM 2/17/2025 12:32:58 PM Page 18 1960 0.033 0.033 1961 0.035 0.035 1962 0.030 0.030 1963 0.033 0.033 1964 0.033 0.033 1965 0.042 0.042 1966 0.028 0.028 1967 0.048 0.048 1968 0.055 0.055 1969 0.038 0.038 1970 0.037 0.037 1971 0.044 0.044 1972 0.045 0.045 1973 0.027 0.027 1974 0.040 0.040 1975 0.046 0.046 1976 0.031 0.031 1977 0.033 0.033 1978 0.041 0.041 1979 0.056 0.056 1980 0.050 0.050 1981 0.041 0.041 1982 0.058 0.058 1983 0.047 0.047 1984 0.030 0.030 1985 0.041 0.041 1986 0.035 0.035 1987 0.055 0.055 1988 0.033 0.033 1989 0.042 0.042 1990 0.070 0.070 1991 0.056 0.056 1992 0.029 0.029 1993 0.025 0.025 1994 0.028 0.028 1995 0.036 0.036 1996 0.039 0.039 1997 0.038 0.038 1998 0.038 0.038 1999 0.078 0.078 2000 0.039 0.039 2001 0.043 0.043 2002 0.050 0.050 2003 0.039 0.039 2004 0.073 0.073 2005 0.033 0.033 2006 0.029 0.029 2007 0.068 0.068 2008 0.055 0.055 2009 0.051 0.051 Ranked Annual Peaks Ranked Annual Peaks for Predeveloped and Mitigated. POC #2 Rank Predeveloped Mitigated 1 0.0780 0.0780 2 0.0730 0.0730 3 0.0700 0.0700 4 0.0682 0.0682 WorldCup_WWHM 2/17/2025 12:32:58 PM Page 19 5 0.0579 0.0579 6 0.0559 0.0559 7 0.0559 0.0559 8 0.0550 0.0550 9 0.0549 0.0549 10 0.0548 0.0548 11 0.0545 0.0545 12 0.0509 0.0509 13 0.0508 0.0508 14 0.0502 0.0502 15 0.0498 0.0498 16 0.0480 0.0480 17 0.0471 0.0471 18 0.0459 0.0459 19 0.0450 0.0450 20 0.0436 0.0436 21 0.0426 0.0426 22 0.0416 0.0416 23 0.0415 0.0415 24 0.0410 0.0410 25 0.0409 0.0409 26 0.0408 0.0408 27 0.0404 0.0404 28 0.0398 0.0398 29 0.0388 0.0388 30 0.0387 0.0387 31 0.0387 0.0387 32 0.0381 0.0381 33 0.0379 0.0379 34 0.0376 0.0376 35 0.0366 0.0366 36 0.0364 0.0364 37 0.0362 0.0362 38 0.0356 0.0356 39 0.0355 0.0355 40 0.0345 0.0345 41 0.0334 0.0334 42 0.0334 0.0334 43 0.0333 0.0333 44 0.0333 0.0333 45 0.0332 0.0332 46 0.0328 0.0328 47 0.0326 0.0326 48 0.0326 0.0326 49 0.0319 0.0319 50 0.0318 0.0318 51 0.0308 0.0308 52 0.0305 0.0305 53 0.0301 0.0301 54 0.0297 0.0297 55 0.0295 0.0295 56 0.0294 0.0294 57 0.0283 0.0283 58 0.0278 0.0278 59 0.0277 0.0277 60 0.0273 0.0273 61 0.0255 0.0255 WorldCup_WWHM 2/17/2025 12:32:58 PM Page 20 WorldCup_WWHM 2/17/2025 12:32:58 PM Page 21 Duration Flows The Facility PASSED Flow(cfs)Predev Mit Percentage Pass/Fail 0.0196 1804 1804 100 Pass 0.0202 1636 1636 100 Pass 0.0207 1475 1475 100 Pass 0.0212 1343 1343 100 Pass 0.0218 1228 1228 100 Pass 0.0223 1102 1102 100 Pass 0.0229 1002 1002 100 Pass 0.0234 920 920 100 Pass 0.0239 853 853 100 Pass 0.0245 792 792 100 Pass 0.0250 726 726 100 Pass 0.0255 665 665 100 Pass 0.0261 610 610 100 Pass 0.0266 571 571 100 Pass 0.0271 533 533 100 Pass 0.0277 488 488 100 Pass 0.0282 450 450 100 Pass 0.0287 420 420 100 Pass 0.0293 389 389 100 Pass 0.0298 364 364 100 Pass 0.0304 339 339 100 Pass 0.0309 316 316 100 Pass 0.0314 296 296 100 Pass 0.0320 271 271 100 Pass 0.0325 256 256 100 Pass 0.0330 238 238 100 Pass 0.0336 221 221 100 Pass 0.0341 206 206 100 Pass 0.0346 193 193 100 Pass 0.0352 181 181 100 Pass 0.0357 171 171 100 Pass 0.0363 161 161 100 Pass 0.0368 148 148 100 Pass 0.0373 139 139 100 Pass 0.0379 135 135 100 Pass 0.0384 122 122 100 Pass 0.0389 113 113 100 Pass 0.0395 108 108 100 Pass 0.0400 105 105 100 Pass 0.0405 100 100 100 Pass 0.0411 92 92 100 Pass 0.0416 87 87 100 Pass 0.0421 84 84 100 Pass 0.0427 73 73 100 Pass 0.0432 71 71 100 Pass 0.0438 65 65 100 Pass 0.0443 63 63 100 Pass 0.0448 62 62 100 Pass 0.0454 58 58 100 Pass 0.0459 54 54 100 Pass 0.0464 54 54 100 Pass 0.0470 52 52 100 Pass 0.0475 50 50 100 Pass WorldCup_WWHM 2/17/2025 12:32:58 PM Page 22 0.0480 46 46 100 Pass 0.0486 45 45 100 Pass 0.0491 40 40 100 Pass 0.0497 38 38 100 Pass 0.0502 33 33 100 Pass 0.0507 32 32 100 Pass 0.0513 29 29 100 Pass 0.0518 28 28 100 Pass 0.0523 25 25 100 Pass 0.0529 22 22 100 Pass 0.0534 21 21 100 Pass 0.0539 20 20 100 Pass 0.0545 17 17 100 Pass 0.0550 13 13 100 Pass 0.0555 12 12 100 Pass 0.0561 9 9 100 Pass 0.0566 9 9 100 Pass 0.0572 9 9 100 Pass 0.0577 9 9 100 Pass 0.0582 8 8 100 Pass 0.0588 8 8 100 Pass 0.0593 8 8 100 Pass 0.0598 8 8 100 Pass 0.0604 8 8 100 Pass 0.0609 8 8 100 Pass 0.0614 8 8 100 Pass 0.0620 7 7 100 Pass 0.0625 7 7 100 Pass 0.0631 7 7 100 Pass 0.0636 7 7 100 Pass 0.0641 7 7 100 Pass 0.0647 7 7 100 Pass 0.0652 6 6 100 Pass 0.0657 6 6 100 Pass 0.0663 6 6 100 Pass 0.0668 6 6 100 Pass 0.0673 6 6 100 Pass 0.0679 6 6 100 Pass 0.0684 5 5 100 Pass 0.0689 5 5 100 Pass 0.0695 4 4 100 Pass 0.0700 3 3 100 Pass 0.0706 3 3 100 Pass 0.0711 2 2 100 Pass 0.0716 2 2 100 Pass 0.0722 2 2 100 Pass 0.0727 2 2 100 Pass WorldCup_WWHM 2/17/2025 12:32:58 PM Page 23 Water Quality Water Quality BMP Flow and Volume for POC #2 On-line facility volume:0 acre-feet On-line facility target flow:0 cfs. Adjusted for 15 min:0 cfs. Off-line facility target flow:0 cfs. Adjusted for 15 min:0 cfs. WorldCup_WWHM 2/17/2025 12:32:58 PM Page 24 LID Report WorldCup_WWHM 2/17/2025 12:32:58 PM Page 25 Model Default Modifications Total of 0 changes have been made. PERLND Changes No PERLND changes have been made. IMPLND Changes No IMPLND changes have been made. WorldCup_WWHM 2/17/2025 12:32:58 PM Page 26 Appendix Predeveloped Schematic WorldCup_WWHM 2/17/2025 12:32:59 PM Page 27 Mitigated Schematic WorldCup_WWHM 2/17/2025 12:32:59 PM Page 28 Predeveloped UCI File RUN GLOBAL WWHM4 model simulation START 1948 10 01 END 2009 09 30 RUN INTERP OUTPUT LEVEL 3 0 RESUME 0 RUN 1 UNIT SYSTEM 1 END GLOBAL FILES <File> <Un#> <-----------File Name------------------------------>*** <-ID-> *** WDM 26 WorldCup_WWHM.wdm MESSU 25 PreWorldCup_WWHM.MES 27 PreWorldCup_WWHM.L61 28 PreWorldCup_WWHM.L62 30 POCWorldCup_WWHM1.dat 31 POCWorldCup_WWHM2.dat END FILES OPN SEQUENCE INGRP INDELT 00:15 PERLND 17 IMPLND 8 IMPLND 11 IMPLND 5 COPY 501 COPY 502 DISPLY 1 DISPLY 2 END INGRP END OPN SEQUENCE DISPLY DISPLY-INFO1 # - #<----------Title----------->***TRAN PIVL DIG1 FIL1 PYR DIG2 FIL2 YRND 1 Basin 1 MAX 1 2 30 9 2 Fusal-Exist MAX 1 2 31 9 END DISPLY-INFO1 END DISPLY COPY TIMESERIES # - # NPT NMN *** 1 1 1 501 1 1 502 1 1 END TIMESERIES END COPY GENER OPCODE # # OPCD *** END OPCODE PARM # # K *** END PARM END GENER PERLND GEN-INFO <PLS ><-------Name------->NBLKS Unit-systems Printer *** # - # User t-series Engl Metr *** in out *** 17 C, Lawn, Mod 1 1 1 1 27 0 END GEN-INFO *** Section PWATER*** ACTIVITY <PLS > ************* Active Sections ***************************** # - # ATMP SNOW PWAT SED PST PWG PQAL MSTL PEST NITR PHOS TRAC *** 17 0 0 1 0 0 0 0 0 0 0 0 0 WorldCup_WWHM 2/17/2025 12:32:59 PM Page 29 END ACTIVITY PRINT-INFO <PLS > ***************** Print-flags ***************************** PIVL PYR # - # ATMP SNOW PWAT SED PST PWG PQAL MSTL PEST NITR PHOS TRAC ********* 17 0 0 4 0 0 0 0 0 0 0 0 0 1 9 END PRINT-INFO PWAT-PARM1 <PLS > PWATER variable monthly parameter value flags *** # - # CSNO RTOP UZFG VCS VUZ VNN VIFW VIRC VLE INFC HWT *** 17 0 0 0 0 0 0 0 0 0 0 0 END PWAT-PARM1 PWAT-PARM2 <PLS > PWATER input info: Part 2 *** # - # ***FOREST LZSN INFILT LSUR SLSUR KVARY AGWRC 17 0 4.5 0.03 400 0.1 0.5 0.996 END PWAT-PARM2 PWAT-PARM3 <PLS > PWATER input info: Part 3 *** # - # ***PETMAX PETMIN INFEXP INFILD DEEPFR BASETP AGWETP 17 0 0 2 2 0 0 0 END PWAT-PARM3 PWAT-PARM4 <PLS > PWATER input info: Part 4 *** # - # CEPSC UZSN NSUR INTFW IRC LZETP *** 17 0.1 0.25 0.25 6 0.5 0.25 END PWAT-PARM4 PWAT-STATE1 <PLS > *** Initial conditions at start of simulation ran from 1990 to end of 1992 (pat 1-11-95) RUN 21 *** # - # *** CEPS SURS UZS IFWS LZS AGWS GWVS 17 0 0 0 0 2.5 1 0 END PWAT-STATE1 END PERLND IMPLND GEN-INFO <PLS ><-------Name-------> Unit-systems Printer *** # - # User t-series Engl Metr *** in out *** 8 SIDEWALKS/FLAT 1 1 1 27 0 11 PARKING/FLAT 1 1 1 27 0 5 DRIVEWAYS/FLAT 1 1 1 27 0 END GEN-INFO *** Section IWATER*** ACTIVITY <PLS > ************* Active Sections ***************************** # - # ATMP SNOW IWAT SLD IWG IQAL *** 8 0 0 1 0 0 0 11 0 0 1 0 0 0 5 0 0 1 0 0 0 END ACTIVITY PRINT-INFO <ILS > ******** Print-flags ******** PIVL PYR # - # ATMP SNOW IWAT SLD IWG IQAL ********* 8 0 0 4 0 0 0 1 9 11 0 0 4 0 0 0 1 9 5 0 0 4 0 0 0 1 9 END PRINT-INFO IWAT-PARM1 <PLS > IWATER variable monthly parameter value flags *** # - # CSNO RTOP VRS VNN RTLI *** WorldCup_WWHM 2/17/2025 12:32:59 PM Page 30 8 0 0 0 0 0 11 0 0 0 0 0 5 0 0 0 0 0 END IWAT-PARM1 IWAT-PARM2 <PLS > IWATER input info: Part 2 *** # - # *** LSUR SLSUR NSUR RETSC 8 400 0.01 0.1 0.1 11 400 0.01 0.1 0.1 5 400 0.01 0.1 0.1 END IWAT-PARM2 IWAT-PARM3 <PLS > IWATER input info: Part 3 *** # - # ***PETMAX PETMIN 8 0 0 11 0 0 5 0 0 END IWAT-PARM3 IWAT-STATE1 <PLS > *** Initial conditions at start of simulation # - # *** RETS SURS 8 0 0 11 0 0 5 0 0 END IWAT-STATE1 END IMPLND SCHEMATIC <-Source-> <--Area--> <-Target-> MBLK *** <Name> # <-factor-> <Name> # Tbl# *** Basin 1*** PERLND 17 0.081 COPY 501 12 PERLND 17 0.081 COPY 501 13 IMPLND 8 0.167 COPY 501 15 IMPLND 11 0.392 COPY 501 15 Fusal-Exist*** IMPLND 5 0.103 COPY 502 15 ******Routing****** END SCHEMATIC NETWORK <-Volume-> <-Grp> <-Member-><--Mult-->Tran <-Target vols> <-Grp> <-Member-> *** <Name> # <Name> # #<-factor->strg <Name> # # <Name> # # *** COPY 501 OUTPUT MEAN 1 1 48.4 DISPLY 1 INPUT TIMSER 1 COPY 502 OUTPUT MEAN 1 1 48.4 DISPLY 2 INPUT TIMSER 1 <-Volume-> <-Grp> <-Member-><--Mult-->Tran <-Target vols> <-Grp> <-Member-> *** <Name> # <Name> # #<-factor->strg <Name> # # <Name> # # *** END NETWORK RCHRES GEN-INFO RCHRES Name Nexits Unit Systems Printer *** # - #<------------------><---> User T-series Engl Metr LKFG *** in out *** END GEN-INFO *** Section RCHRES*** ACTIVITY <PLS > ************* Active Sections ***************************** # - # HYFG ADFG CNFG HTFG SDFG GQFG OXFG NUFG PKFG PHFG *** END ACTIVITY WorldCup_WWHM 2/17/2025 12:32:59 PM Page 31 PRINT-INFO <PLS > ***************** Print-flags ******************* PIVL PYR # - # HYDR ADCA CONS HEAT SED GQL OXRX NUTR PLNK PHCB PIVL PYR ********* END PRINT-INFO HYDR-PARM1 RCHRES Flags for each HYDR Section *** # - # VC A1 A2 A3 ODFVFG for each *** ODGTFG for each FUNCT for each FG FG FG FG possible exit *** possible exit possible exit * * * * * * * * * * * * * * *** END HYDR-PARM1 HYDR-PARM2 # - # FTABNO LEN DELTH STCOR KS DB50 *** <------><--------><--------><--------><--------><--------><--------> *** END HYDR-PARM2 HYDR-INIT RCHRES Initial conditions for each HYDR section *** # - # *** VOL Initial value of COLIND Initial value of OUTDGT *** ac-ft for each possible exit for each possible exit <------><--------> <---><---><---><---><---> *** <---><---><---><---><---> END HYDR-INIT END RCHRES SPEC-ACTIONS END SPEC-ACTIONS FTABLES END FTABLES EXT SOURCES <-Volume-> <Member> SsysSgap<--Mult-->Tran <-Target vols> <-Grp> <-Member-> *** <Name> # <Name> # tem strg<-factor->strg <Name> # # <Name> # # *** WDM 2 PREC ENGL 1 PERLND 1 999 EXTNL PREC WDM 2 PREC ENGL 1 IMPLND 1 999 EXTNL PREC WDM 1 EVAP ENGL 0.76 PERLND 1 999 EXTNL PETINP WDM 1 EVAP ENGL 0.76 IMPLND 1 999 EXTNL PETINP END EXT SOURCES EXT TARGETS <-Volume-> <-Grp> <-Member-><--Mult-->Tran <-Volume-> <Member> Tsys Tgap Amd *** <Name> # <Name> # #<-factor->strg <Name> # <Name> tem strg strg*** COPY 501 OUTPUT MEAN 1 1 48.4 WDM 501 FLOW ENGL REPL COPY 502 OUTPUT MEAN 1 1 48.4 WDM 502 FLOW ENGL REPL END EXT TARGETS MASS-LINK <Volume> <-Grp> <-Member-><--Mult--> <Target> <-Grp> <-Member->*** <Name> <Name> # #<-factor-> <Name> <Name> # #*** MASS-LINK 12 PERLND PWATER SURO 0.083333 COPY INPUT MEAN END MASS-LINK 12 MASS-LINK 13 PERLND PWATER IFWO 0.083333 COPY INPUT MEAN END MASS-LINK 13 MASS-LINK 15 IMPLND IWATER SURO 0.083333 COPY INPUT MEAN END MASS-LINK 15 END MASS-LINK END RUN WorldCup_WWHM 2/17/2025 12:32:59 PM Page 32 Mitigated UCI File RUN GLOBAL WWHM4 model simulation START 1948 10 01 END 2009 09 30 RUN INTERP OUTPUT LEVEL 3 0 RESUME 0 RUN 1 UNIT SYSTEM 1 END GLOBAL FILES <File> <Un#> <-----------File Name------------------------------>*** <-ID-> *** WDM 26 WorldCup_WWHM.wdm MESSU 25 MitWorldCup_WWHM.MES 27 MitWorldCup_WWHM.L61 28 MitWorldCup_WWHM.L62 30 POCWorldCup_WWHM1.dat 31 POCWorldCup_WWHM2.dat END FILES OPN SEQUENCE INGRP INDELT 00:15 PERLND 17 IMPLND 4 IMPLND 8 IMPLND 11 IMPLND 5 COPY 501 COPY 502 DISPLY 1 DISPLY 2 END INGRP END OPN SEQUENCE DISPLY DISPLY-INFO1 # - #<----------Title----------->***TRAN PIVL DIG1 FIL1 PYR DIG2 FIL2 YRND 1 Basin 1 MAX 1 2 30 9 2 Fusal-Conveyance MAX 1 2 31 9 END DISPLY-INFO1 END DISPLY COPY TIMESERIES # - # NPT NMN *** 1 1 1 501 1 1 502 1 1 END TIMESERIES END COPY GENER OPCODE # # OPCD *** END OPCODE PARM # # K *** END PARM END GENER PERLND GEN-INFO <PLS ><-------Name------->NBLKS Unit-systems Printer *** # - # User t-series Engl Metr *** in out *** 17 C, Lawn, Mod 1 1 1 1 27 0 END GEN-INFO *** Section PWATER*** ACTIVITY <PLS > ************* Active Sections ***************************** # - # ATMP SNOW PWAT SED PST PWG PQAL MSTL PEST NITR PHOS TRAC *** WorldCup_WWHM 2/17/2025 12:32:59 PM Page 33 17 0 0 1 0 0 0 0 0 0 0 0 0 END ACTIVITY PRINT-INFO <PLS > ***************** Print-flags ***************************** PIVL PYR # - # ATMP SNOW PWAT SED PST PWG PQAL MSTL PEST NITR PHOS TRAC ********* 17 0 0 4 0 0 0 0 0 0 0 0 0 1 9 END PRINT-INFO PWAT-PARM1 <PLS > PWATER variable monthly parameter value flags *** # - # CSNO RTOP UZFG VCS VUZ VNN VIFW VIRC VLE INFC HWT *** 17 0 0 0 0 0 0 0 0 0 0 0 END PWAT-PARM1 PWAT-PARM2 <PLS > PWATER input info: Part 2 *** # - # ***FOREST LZSN INFILT LSUR SLSUR KVARY AGWRC 17 0 4.5 0.03 400 0.1 0.5 0.996 END PWAT-PARM2 PWAT-PARM3 <PLS > PWATER input info: Part 3 *** # - # ***PETMAX PETMIN INFEXP INFILD DEEPFR BASETP AGWETP 17 0 0 2 2 0 0 0 END PWAT-PARM3 PWAT-PARM4 <PLS > PWATER input info: Part 4 *** # - # CEPSC UZSN NSUR INTFW IRC LZETP *** 17 0.1 0.25 0.25 6 0.5 0.25 END PWAT-PARM4 PWAT-STATE1 <PLS > *** Initial conditions at start of simulation ran from 1990 to end of 1992 (pat 1-11-95) RUN 21 *** # - # *** CEPS SURS UZS IFWS LZS AGWS GWVS 17 0 0 0 0 2.5 1 0 END PWAT-STATE1 END PERLND IMPLND GEN-INFO <PLS ><-------Name-------> Unit-systems Printer *** # - # User t-series Engl Metr *** in out *** 4 ROOF TOPS/FLAT 1 1 1 27 0 8 SIDEWALKS/FLAT 1 1 1 27 0 11 PARKING/FLAT 1 1 1 27 0 5 DRIVEWAYS/FLAT 1 1 1 27 0 END GEN-INFO *** Section IWATER*** ACTIVITY <PLS > ************* Active Sections ***************************** # - # ATMP SNOW IWAT SLD IWG IQAL *** 4 0 0 1 0 0 0 8 0 0 1 0 0 0 11 0 0 1 0 0 0 5 0 0 1 0 0 0 END ACTIVITY PRINT-INFO <ILS > ******** Print-flags ******** PIVL PYR # - # ATMP SNOW IWAT SLD IWG IQAL ********* 4 0 0 4 0 0 0 1 9 8 0 0 4 0 0 0 1 9 11 0 0 4 0 0 0 1 9 5 0 0 4 0 0 0 1 9 END PRINT-INFO WorldCup_WWHM 2/17/2025 12:32:59 PM Page 34 IWAT-PARM1 <PLS > IWATER variable monthly parameter value flags *** # - # CSNO RTOP VRS VNN RTLI *** 4 0 0 0 0 0 8 0 0 0 0 0 11 0 0 0 0 0 5 0 0 0 0 0 END IWAT-PARM1 IWAT-PARM2 <PLS > IWATER input info: Part 2 *** # - # *** LSUR SLSUR NSUR RETSC 4 400 0.01 0.1 0.1 8 400 0.01 0.1 0.1 11 400 0.01 0.1 0.1 5 400 0.01 0.1 0.1 END IWAT-PARM2 IWAT-PARM3 <PLS > IWATER input info: Part 3 *** # - # ***PETMAX PETMIN 4 0 0 8 0 0 11 0 0 5 0 0 END IWAT-PARM3 IWAT-STATE1 <PLS > *** Initial conditions at start of simulation # - # *** RETS SURS 4 0 0 8 0 0 11 0 0 5 0 0 END IWAT-STATE1 END IMPLND SCHEMATIC <-Source-> <--Area--> <-Target-> MBLK *** <Name> # <-factor-> <Name> # Tbl# *** Basin 1*** PERLND 17 0.043 COPY 501 12 PERLND 17 0.043 COPY 501 13 IMPLND 4 0.028 COPY 501 15 IMPLND 8 0.454 COPY 501 15 IMPLND 11 0.115 COPY 501 15 Fusal-Conveyance*** IMPLND 5 0.103 COPY 502 15 ******Routing****** END SCHEMATIC NETWORK <-Volume-> <-Grp> <-Member-><--Mult-->Tran <-Target vols> <-Grp> <-Member-> *** <Name> # <Name> # #<-factor->strg <Name> # # <Name> # # *** COPY 501 OUTPUT MEAN 1 1 48.4 DISPLY 1 INPUT TIMSER 1 COPY 502 OUTPUT MEAN 1 1 48.4 DISPLY 2 INPUT TIMSER 1 <-Volume-> <-Grp> <-Member-><--Mult-->Tran <-Target vols> <-Grp> <-Member-> *** <Name> # <Name> # #<-factor->strg <Name> # # <Name> # # *** END NETWORK RCHRES GEN-INFO RCHRES Name Nexits Unit Systems Printer *** # - #<------------------><---> User T-series Engl Metr LKFG *** WorldCup_WWHM 2/17/2025 12:32:59 PM Page 35 in out *** END GEN-INFO *** Section RCHRES*** ACTIVITY <PLS > ************* Active Sections ***************************** # - # HYFG ADFG CNFG HTFG SDFG GQFG OXFG NUFG PKFG PHFG *** END ACTIVITY PRINT-INFO <PLS > ***************** Print-flags ******************* PIVL PYR # - # HYDR ADCA CONS HEAT SED GQL OXRX NUTR PLNK PHCB PIVL PYR ********* END PRINT-INFO HYDR-PARM1 RCHRES Flags for each HYDR Section *** # - # VC A1 A2 A3 ODFVFG for each *** ODGTFG for each FUNCT for each FG FG FG FG possible exit *** possible exit possible exit * * * * * * * * * * * * * * *** END HYDR-PARM1 HYDR-PARM2 # - # FTABNO LEN DELTH STCOR KS DB50 *** <------><--------><--------><--------><--------><--------><--------> *** END HYDR-PARM2 HYDR-INIT RCHRES Initial conditions for each HYDR section *** # - # *** VOL Initial value of COLIND Initial value of OUTDGT *** ac-ft for each possible exit for each possible exit <------><--------> <---><---><---><---><---> *** <---><---><---><---><---> END HYDR-INIT END RCHRES SPEC-ACTIONS END SPEC-ACTIONS FTABLES END FTABLES EXT SOURCES <-Volume-> <Member> SsysSgap<--Mult-->Tran <-Target vols> <-Grp> <-Member-> *** <Name> # <Name> # tem strg<-factor->strg <Name> # # <Name> # # *** WDM 2 PREC ENGL 1 PERLND 1 999 EXTNL PREC WDM 2 PREC ENGL 1 IMPLND 1 999 EXTNL PREC WDM 1 EVAP ENGL 0.76 PERLND 1 999 EXTNL PETINP WDM 1 EVAP ENGL 0.76 IMPLND 1 999 EXTNL PETINP END EXT SOURCES EXT TARGETS <-Volume-> <-Grp> <-Member-><--Mult-->Tran <-Volume-> <Member> Tsys Tgap Amd *** <Name> # <Name> # #<-factor->strg <Name> # <Name> tem strg strg*** COPY 1 OUTPUT MEAN 1 1 48.4 WDM 701 FLOW ENGL REPL COPY 501 OUTPUT MEAN 1 1 48.4 WDM 801 FLOW ENGL REPL COPY 2 OUTPUT MEAN 1 1 48.4 WDM 702 FLOW ENGL REPL COPY 502 OUTPUT MEAN 1 1 48.4 WDM 802 FLOW ENGL REPL END EXT TARGETS MASS-LINK <Volume> <-Grp> <-Member-><--Mult--> <Target> <-Grp> <-Member->*** <Name> <Name> # #<-factor-> <Name> <Name> # #*** MASS-LINK 12 PERLND PWATER SURO 0.083333 COPY INPUT MEAN END MASS-LINK 12 MASS-LINK 13 PERLND PWATER IFWO 0.083333 COPY INPUT MEAN END MASS-LINK 13 MASS-LINK 15 IMPLND IWATER SURO 0.083333 COPY INPUT MEAN WorldCup_WWHM 2/17/2025 12:32:59 PM Page 36 END MASS-LINK 15 END MASS-LINK END RUN WorldCup_WWHM 2/17/2025 12:32:59 PM Page 37 Predeveloped HSPF Message File WorldCup_WWHM 2/17/2025 12:32:59 PM Page 38 Mitigated HSPF Message File WorldCup_WWHM 2/17/2025 12:32:59 PM Page 39 Disclaimer Legal Notice This program and accompanying documentation are provided 'as-is' without warranty of any kind. The entire risk regarding the performance and results of this program is assumed by End User. Clear Creek Solutions Inc. and the governmental licensee or sublicensees disclaim all warranties, either expressed or implied, including but not limited to implied warranties of program and accompanying documentation. In no event shall Clear Creek Solutions Inc. be liable for any damages whatsoever (including without limitation to damages for loss of business profits, loss of business information, business interruption, and the like) arising out of the use of, or inability to use this program even if Clear Creek Solutions Inc. or their authorized representatives have been advised of the possibility of such damages. Software Copyright © by : Clear Creek Solutions, Inc. 2005-2025; All Rights Reserved. Clear Creek Solutions, Inc. 6200 Capitol Blvd. Ste F Olympia, WA. 98501 Toll Free 1(866)943-0304 Local (360)943-0304 www.clearcreeksolutions.com World Cup Legacy Square – City of Renton 5 APPENDIX F – CONVEYANCE ANALYSIS RESULTS WWHM2012 PROJECT REPORT EXCERPTS FROM WWHM MODEL. REFER TO APPENDIX E FOR THE WWHM MODEL RESULTS IN ITS ENTIRETY. WorldCup_WWHM 2/17/2025 12:31:05 PM Page 2 General Model Information Project Name:WorldCup_WWHM Site Name: Site Address: City: Report Date:2/17/2025 Gage:Seatac Data Start:1948/10/01 00:00 Data End:2009/09/30 00:00 Timestep:15 Minute Precip Scale:1.000 Version Date:2021/08/18 Version:4.2.18 POC Thresholds Low Flow Threshold for POC1:50 Percent of the 2 Year High Flow Threshold for POC1:50 Year Low Flow Threshold for POC2:50 Percent of the 2 Year High Flow Threshold for POC2:50 Year WorldCup_WWHM 2/17/2025 12:31:05 PM Page 3 Landuse Basin Data Predeveloped Land Use Basin 1 Bypass:No GroundWater:No Pervious Land Use acre C, Lawn, Mod 0.081 Pervious Total 0.081 Impervious Land Use acre SIDEWALKS FLAT 0.167 PARKING FLAT 0.392 Impervious Total 0.559 Basin Total 0.64 Element Flows To: Surface Interflow Groundwater WorldCup_WWHM 2/17/2025 12:31:05 PM Page 4 Fusal-Exist Bypass:No GroundWater:No Pervious Land Use acre Pervious Total 0 Impervious Land Use acre DRIVEWAYS FLAT 0.103 Impervious Total 0.103 Basin Total 0.103 Element Flows To: Surface Interflow Groundwater WorldCup_WWHM 2/17/2025 12:31:05 PM Page 5 Mitigated Land Use Basin 1 Bypass:No GroundWater:No Pervious Land Use acre C, Lawn, Mod 0.043 Pervious Total 0.043 Impervious Land Use acre ROOF TOPS FLAT 0.028 SIDEWALKS FLAT 0.454 PARKING FLAT 0.115 Impervious Total 0.597 Basin Total 0.64 Element Flows To: Surface Interflow Groundwater WorldCup_WWHM 2/17/2025 12:31:05 PM Page 6 Fusal-Conveyance Bypass:No GroundWater:No Pervious Land Use acre Pervious Total 0 Impervious Land Use acre DRIVEWAYS FLAT 0.103 Impervious Total 0.103 Basin Total 0.103 Element Flows To: Surface Interflow Groundwater WorldCup_WWHM 2/17/2025 12:31:05 PM Page 9 Analysis Results POC 1 + Predeveloped x Mitigated Predeveloped Landuse Totals for POC #1 Total Pervious Area:0.081 Total Impervious Area:0.559 Mitigated Landuse Totals for POC #1 Total Pervious Area:0.043 Total Impervious Area:0.597 Flow Frequency Method:Log Pearson Type III 17B Flow Frequency Return Periods for Predeveloped. POC #1 Return Period Flow(cfs) 2 year 0.219317 5 year 0.279198 10 year 0.320128 25 year 0.373472 50 year 0.414469 100 year 0.456599 Flow Frequency Return Periods for Mitigated. POC #1 Return Period Flow(cfs) 2 year 0.230914 5 year 0.292787 10 year 0.334949 25 year 0.389766 50 year 0.431806 100 year 0.474935 Annual Peaks Annual Peaks for Predeveloped and Mitigated. POC #1 Year Predeveloped Mitigated 1949 0.291 0.303 1950 0.301 0.320 1951 0.181 0.189 1952 0.154 0.164 1953 0.167 0.178 1954 0.179 0.188 1955 0.201 0.212 1956 0.198 0.209 1957 0.229 0.239 1958 0.181 0.191 MAXIMUM FLOW TO ANY 8-INCH SERVICE LINE WITHIN SITE. WorldCup_WWHM 2/17/2025 12:32:21 PM Page 17 POC 2 + Predeveloped x Mitigated Predeveloped Landuse Totals for POC #2 Total Pervious Area:0 Total Impervious Area:0.103 Mitigated Landuse Totals for POC #2 Total Pervious Area:0 Total Impervious Area:0.103 Flow Frequency Method:Log Pearson Type III 17B Flow Frequency Return Periods for Predeveloped. POC #2 Return Period Flow(cfs) 2 year 0.03927 5 year 0.049603 10 year 0.056623 25 year 0.06573 50 year 0.072699 100 year 0.079838 Flow Frequency Return Periods for Mitigated. POC #2 Return Period Flow(cfs) 2 year 0.03927 5 year 0.049603 10 year 0.056623 25 year 0.06573 50 year 0.072699 100 year 0.079838 Annual Peaks Annual Peaks for Predeveloped and Mitigated. POC #2 Year Predeveloped Mitigated 1949 0.051 0.051 1950 0.055 0.055 1951 0.032 0.032 1952 0.028 0.028 1953 0.031 0.031 1954 0.032 0.032 1955 0.036 0.036 1956 0.036 0.036 1957 0.040 0.040 1958 0.033 0.033 1959 0.033 0.033 MAXIMUM FLOW TO 4-INCH TRENCH DRAINS ONSITE. Pipe Parameters (Input Values) Inside Pipe Diameter D=8 in Depth of Flow in Pipe d=7.51 in Slope of Pipe So=0.005 ft /ft Relative Pipe Roughness n=0.013 Flow Q=0.919 cfs Output Pipe Discharge Q=1.49⁄n Aw Rh 2⁄3 So½ = 1.49⁄0.013 (0.34)(0.193) 2⁄3(0.005)½ = 0.919 cfs = 594,070 gpd Pipe Flow Velocity V = Q⁄Aw = 0.919⁄0.34 = 2.702 ft/s Percent Full (Volume) % = Aw⁄At = 0.34⁄0.349 = 97% Percent Full (Depth) % = d⁄D = 0.626⁄0.667 = 94% Manning Equation Variables Wetted Area of Flow Aw=½r2 (α-sinα) = ½(0.333) 2(5.281 - sin 5.281) = 0.34 ft2 Wetted Perimeter Pw=rα=0.333 ft x 5.281 = 1.76 ft Hydraulic Radius Rh=Aw⁄ Pw=0.34 ft 2 ⁄ 1.76 ft = 0.193ft Pipe Geometry Variables Inside Radius of Pipe r = D⁄2 = 0.667⁄2 = 0.333 ft Flow Depth - Pipe Radius h = d - r = 0.626 - 0.333 = 0.292 ft Angle #1 θ = arccos(h⁄r) = arccos(0.292⁄0.333) = 0.501 rad Angle #2 α = 2 π- 2 θ = 2 π - 2(0.501) = 5.281 rad Total Inside Pipe Area At = π r2 = π(0.333)2 = 0.349 ft2 2/17/25, 12:04 PM CivilToolbox Manning Pipe https://www.civiltoolbox.com/manningpipe/#1/1 MAXIMUM FLOW CAPACITY OF 8-INCH PVC PIPE AT A SLOPE OF 0.5% IS 0.919 CFS WHICH IS GREATER THAN 0.475 CFS PRODUCED ONSITE DURING THE 100-YEAR, 15-MINUTE STORM EVENT. Pipe Parameters (Input Values) Inside Pipe Diameter D=8 in Depth of Flow in Pipe d=4.27 in Slope of Pipe So=0.005 ft /ft Relative Pipe Roughness n=0.013 Flow Q=0.474935 cfs Output Pipe Discharge Q=1.49⁄n Aw Rh 2⁄3 So½ = 1.49⁄0.013 (0.189)(0.173) 2⁄3(0.005)½ = 0.475 cfs = 306,978 gpd Pipe Flow Velocity V = Q⁄Aw = 0.475⁄0.189 = 2.51 ft/s Percent Full (Volume) % = Aw⁄At = 0.189⁄0.349 = 54% Percent Full (Depth) % = d⁄D = 0.356⁄0.667 = 53% Manning Equation Variables Wetted Area of Flow Aw=½r2 (α-sinα) = ½(0.333) 2(3.274 - sin 3.274) = 0.189 ft2 Wetted Perimeter Pw=rα=0.333 ft x 3.274 = 1.091 ft Hydraulic Radius Rh=Aw⁄ Pw=0.189 ft 2 ⁄ 1.091 ft = 0.173ft Pipe Geometry Variables Inside Radius of Pipe r = D⁄2 = 0.667⁄2 = 0.333 ft Flow Depth - Pipe Radius h = d - r = 0.356 - 0.333 = 0.022 ft Angle #1 θ = arccos(h⁄r) = arccos(0.022⁄0.333) = 1.505 rad Angle #2 α = 2 π- 2 θ = 2 π - 2(1.505) = 3.274 rad Total Inside Pipe Area At = π r2 = π(0.333)2 = 0.349 ft2 2/17/25, 12:07 PM CivilToolbox Manning Pipe https://www.civiltoolbox.com/manningpipe/#1/1 MAXIMUM DEPTH OF SURFACE WATER WITHIN 8-INCH PVC PIPE IS 4.27 INCHES AT THE MAXIMUM 100-YEAR, 15-MINUTE PEAK FLOW PRODUCED ONSITE. Channel Parameters (Input Values) Bottom Width W=0.33 ft Left Bank Slope (H⁄V) =0 :1 Right Bank Slope (H⁄V) =0 :1 Depth of Flow in Channel d=0.33 ft Slope of Channel So (V⁄H)=0.050 ft ⁄ ft Relative Channel Roughness n=0.035 Flow Q=0.237 cfs Output Channel Discharge Q=1.49⁄n Aw R h 2⁄3 So½ = 1.49⁄0.035 ( 0.109)(0.11) 2⁄3(0.05)½ = 0.237 cfs Channel Flow Velocity V = Q⁄Aw = 0.237⁄0.109 = 2.179 ft/s Freeboard Fb = 1⁄6(d + V2⁄(2(g))) = 1⁄6(0.33 + 2.1792⁄(2(32.174))) = 0.067 ft Top Width TW = LB + RB + W = 0 + 0 + 0.33 = 0.33 ft Manning Equation Variables Wetted Area of Flow A w=(d)(LB)(½) + (d)(RB)(½) + (W)(d) = (0.33)(0)(½) + (0.33)(0)(½) + (0.33)(0.33) = 0.109 ft2 Wetted Perimeter Pw= RBP + LBP + W = 0.33 ft + 0.33 ft + 0.33 ft = 0.99 ft Hydraulic Radius Rh=Aw⁄ Pw=0.109 ft 2 ⁄ 0.99 ft = 0.11ft Channel Geometry Variables Left Bank Width LB = (d)(Left Bank Slope) = (0.33)(0) = 0 ft Right Bank Width RB = (d)(Right Bank Slope) = (0.33)(0) = 0 ft Right bank perimeter length RBP = √( RB2 + d2 ) = √(02+ 0.332) = 0.33ft Left bank perimeter length LBP = √( LB2 + d2 ) = √(02+ 0.332) = 0.33ft 2/17/25, 12:25 PM CivilToolbox Trapezoidal Channel Calculator https://www.civiltoolbox.com/manningtrap/#1/1 MAXIMUM FLOW CAPACITY OF 4-INCH TRENCH DRAIN AT A SLOPE OF 0.5% IS 0.237 CFS WHICH IS GREATER THAN 0.0798 CFS PRODUCED ONSITE THAT WOULD FLOW TO ANY TRENCH DRAIN ONSITE DURING THE 100-YEAR, 15-MINUTE STORM EVENT. Channel Parameters (Input Values) Bottom Width W=0.33 ft Left Bank Slope (H⁄V) =0 :1 Right Bank Slope (H⁄V) =0 :1 Depth of Flow in Channel d=0.14 ft Slope of Channel So (V⁄H)=0.050 ft ⁄ ft Relative Channel Roughness n=0.035 Flow Q=0.0798 cfs Output Channel Discharge Q=1.49⁄n Aw R h 2⁄3 So½ = 1.49⁄0.035 ( 0.047)(0.077) 2⁄3(0.05)½ = 0.08 cfs Channel Flow Velocity V = Q⁄Aw = 0.08⁄0.047 = 1.703 ft/s Freeboard Fb = 1⁄6(d + V2⁄(2(g))) = 1⁄6(0.143 + 1.7032⁄(2(32.174))) = 0.031 ft Top Width TW = LB + RB + W = 0 + 0 + 0.33 = 0.33 ft Manning Equation Variables Wetted Area of Flow A w=(d)(LB)(½) + (d)(RB)(½) + (W)(d) = (0.143)(0)(½) + (0.143)(0)(½) + (0.143)(0.33) = 0.047 ft2 Wetted Perimeter Pw= RBP + LBP + W = 0.143 ft + 0.143 ft + 0.33 ft = 0.616 ft Hydraulic Radius Rh=Aw⁄ Pw=0.047 ft 2 ⁄ 0.616 ft = 0.077ft Channel Geometry Variables Left Bank Width LB = (d)(Left Bank Slope) = (0.143)(0) = 0 ft Right Bank Width RB = (d)(Right Bank Slope) = (0.143)(0) = 0 ft Right bank perimeter length RBP = √( RB2 + d2 ) = √(02+ 0.1432) = 0.143ft Left bank perimeter length LBP = √( LB2 + d2 ) = √(02+ 0.1432) = 0.143ft 2/17/25, 12:24 PM CivilToolbox Trapezoidal Channel Calculator https://www.civiltoolbox.com/manningtrap/#1/1 MAXIMUM DEPTH OF SURFACE WATER WITHIN 4-INCH TRENCH DRAIN IS 0.14 FEET (1.68 INCHES) AT THE MAXIMUM 100-YEAR, 15-MINUTE PEAK FLOW PRODUCED ONSITE THAT WOULD FLOW TO ANY TRENCH DRAIN ONSITE . World Cup Legacy Square – City of Renton 6 APPENDIX G – MAINTENANCE REQUIREMENTS FOR STORMWATER FACILITIES AND ON-SITE BMPS APPENDIX A MAINTENANCE REQUIREMENTS FOR STORMWATER FACILITIES AND ON-SITE BMPS 6/22/2022 2022 City of Renton Surface Water Design Manual A-10 NO. 5 – CATCH BASINS AND MANHOLES MAINTENANCE COMPONENT DEFECT OR PROBLEM CONDITION WHEN MAINTENANCE IS NEEDED RESULTS EXPECTED WHEN MAINTENANCE IS PERFORMED Structure Sediment accumulation Sediment exceeds 60% of the depth from the bottom of the catch basin to the invert of the lowest pipe into or out of the catch basin or is within 6 inches of the invert of the lowest pipe into or out of the catch basin. Sump of catch basin contains no sediment. Trash and debris Trash or debris of more than ½ cubic foot which is located immediately in front of the catch basin opening or is blocking capacity of the catch basin by more than 10%. No Trash or debris blocking or potentially blocking entrance to catch basin. Trash or debris in the catch 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. 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 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. Damage to frame and/or top slab Corner of frame extends more than ¾ 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 ¼ inch. Top slab is free of holes and cracks. Frame not sitting flush on top slab, i.e., separation of more than ¾ inch of the frame from the top slab. Frame is sitting flush on top slab. Cracks in walls or bottom Cracks wider than ½ inch and longer than 3 feet, any evidence of soil particles entering catch basin through cracks, or maintenance person judges that catch basin is unsound. Catch basin is sealed and is structurally sound. Cracks wider than ½ 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. Settlement/ misalignment Catch basin has settled more than 1 inch or has rotated more than 2 inches out of alignment. Basin replaced or repaired to design standards. Damaged pipe joints Cracks wider than ½-inch at the joint of the inlet/outlet pipes or any evidence of soil entering the catch basin at the joint of the inlet/outlet pipes. No cracks more than ¼-inch wide at the joint of inlet/outlet pipes. Contaminants and pollution Any evidence of contaminants or pollution such as oil, gasoline, concrete slurries or paint. Materials removed and disposed of according to applicable regulations. Source control BMPs implemented if appropriate. No contaminants present other than a surface oil film. Inlet/Outlet Pipe Sediment accumulation Sediment filling 20% or more of the pipe. Inlet/outlet pipes clear of sediment. Trash and debris Trash and debris accumulated in inlet/outlet pipes (includes floatables and non-floatables). No trash or debris in pipes. APPENDIX A MAINTENANCE REQUIREMENTS FOR STORMWATER FACILITIES AND ON-SITE BMPS 2022 City of Renton Surface Water Design Manual 6/22/2022 A-11 NO. 5 – CATCH BASINS AND MANHOLES MAINTENANCE COMPONENT DEFECT OR PROBLEM CONDITION WHEN MAINTENANCE IS NEEDED RESULTS EXPECTED WHEN MAINTENANCE IS PERFORMED Inlet/Outlet Pipe (cont.) Damaged inlet/outlet pipe Cracks wider than ½-inch at the joint of the inlet/outlet pipes or any evidence of soil entering at the joints of the inlet/outlet pipes. No cracks more than ¼-inch wide at the joint of the inlet/outlet pipe. Metal Grates (Catch Basins) Unsafe grate opening Grate with opening wider than 7/8 inch. Grate opening meets design standards. 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 Grate missing or broken member(s) of the grate. Any open structure requires urgent maintenance. Grate is in place and meets design standards. Manhole Cover/Lid Cover/lid not in place Cover/lid is missing or only partially in place. Any open structure requires urgent maintenance. Cover/lid protects opening to structure. Locking mechanism not working Mechanism cannot be opened by one maintenance person with proper tools. Bolts cannot be seated. Self-locking cover/lid does not work. Mechanism opens with proper tools. Cover/lid difficult to remove One maintenance person cannot remove cover/lid after applying 80 lbs. of lift. Cover/lid can be removed and reinstalled by one maintenance person. APPENDIX A MAINTENANCE REQUIREMENTS FOR STORMWATER FACILITIES AND ON-SITE BMPS 6/22/2022 2022 City of Renton Surface Water Design Manual A-12 NO. 6 – CONVEYANCE PIPES AND DITCHES MAINTENANCE COMPONENT DEFECT OR PROBLEM CONDITIONS WHEN MAINTENANCE IS NEEDED RESULTS EXPECTED WHEN MAINTENANCE IS PERFORMED Pipes Sediment & debris accumulation Accumulated sediment or debris that exceeds 20% of the diameter of the pipe. Water flows freely through pipes. Vegetation/root growth in pipe Vegetation/roots that reduce free movement of water through pipes. Water flows freely through pipes. Contaminants and pollution Any evidence of contaminants or pollution such as oil, gasoline, concrete slurries or paint. Materials removed and disposed of according to applicable regulations. Source control BMPs implemented if appropriate. No contaminants present other than a surface oil film. Damage to protective coating or corrosion Protective coating is damaged; rust or corrosion is weakening the structural integrity of any part of pipe. Pipe repaired or replaced. Damaged pipes Any dent that decreases the cross section area of pipe by more than 20% or is determined to have weakened structural integrity of the pipe. Pipe repaired or replaced. Ditches Trash and debris Trash and debris exceeds 1 cubic foot per 1,000 square feet of ditch and slopes. Trash and debris cleared from ditches. Sediment accumulation Accumulated sediment that exceeds 20% of the design depth. Ditch cleaned/flushed of all sediment and debris so that it matches design. Noxious weeds Any noxious or nuisance vegetation which may constitute a hazard to City personnel or the public. Noxious and nuisance vegetation removed according to applicable regulations. No danger of noxious vegetation where City personnel or the public might normally be. Contaminants and pollution Any evidence of contaminants or pollution such as oil, gasoline, concrete slurries or paint. Materials removed and disposed of according to applicable regulations. Source control BMPs implemented if appropriate. No contaminants present other than a surface oil film. Excessive vegetation growth Vegetation that reduces free movement of water through ditches. Water flows freely through ditches. Erosion damage to slopes Any erosion observed on a ditch slope. Slopes are not eroding. Rock lining out of place or missing (If applicable) One layer or less of rock exists above native soil area 5 square feet or more, any exposed native soil. Replace rocks to design standards. APPENDIX A MAINTENANCE REQUIREMENTS FOR STORMWATER FACILITIES AND ON-SITE BMPS 2022 City of Renton Surface Water Design Manual 6/22/2022 A-15 NO. 9 – FENCING MAINTENANCE COMPONENT DEFECT OR PROBLEM CONDITIONS WHEN MAINTENANCE IS NEEDED RESULTS EXPECTED WHEN MAINTENANCE IS PERFORMED Site Erosion or holes under fence Erosion or holes more than 4 inches high and 12-18 inches wide permitting access through an opening under a fence. No access under the fence. Wood Posts, Boards and Cross Members Missing or damaged parts Missing or broken boards, post out of plumb by more than 6 inches or cross members broken No gaps on fence due to missing or broken boards, post plumb to within 1½ inches, cross members sound. Weakened by rotting or insects Any part showing structural deterioration due to rotting or insect damage All parts of fence are structurally sound. Damaged or failed post foundation Concrete or metal attachments deteriorated or unable to support posts. Post foundation capable of supporting posts even in strong wind. Metal Posts, Rails and Fabric Damaged parts Post out of plumb more than 6 inches. Post plumb to within 1½ inches. Top rails bent more than 6 inches. Top rail free of bends greater than 1 inch. Any part of fence (including post, top rails, and fabric) more than 1 foot out of design alignment. Fence is aligned and meets design standards. Missing or loose tension wire. Tension wire in place and holding fabric. Deteriorated paint or protective coating Part or parts that have a rusting or scaling condition that has affected structural adequacy. Structurally adequate posts or parts with a uniform protective coating. Openings in fabric Openings in fabric are such that an 8-inch diameter ball could fit through. Fabric mesh openings within 50% of grid size. APPENDIX A MAINTENANCE REQUIREMENTS FOR STORMWATER FACILITIES AND ON-SITE BMPS 6/22/2022 2022 City of Renton Surface Water Design Manual A-16 NO. 10 – GATES/BOLLARDS/ACCESS BARRIERS MAINTENANCE COMPONENT DEFECT OR PROBLEM CONDITIONS WHEN MAINTENANCE IS NEEDED RESULTS EXPECTED WHEN MAINTENANCE IS PERFORMED Chain Link Fencing Gate Damaged or missing members Missing gate. Gates in place. Broken or missing hinges such that gate cannot be easily opened and closed by a maintenance person. Hinges intact and lubed. Gate is working freely. Gate is out of plumb more than 6 inches and more than 1 foot out of design alignment. Gate is aligned and vertical. Missing stretcher bar, stretcher bands, and ties. Stretcher bar, bands, and ties in place. Locking mechanism does not lock gate Locking device missing, non-functioning or does not link to all parts. Locking mechanism prevents opening of gate. Openings in fabric Openings in fabric are such that an 8-inch diameter ball could fit through. Fabric mesh openings within 50% of grid size. Bar Gate Damaged or missing cross bar Cross bar does not swing open or closed, is missing or is bent to where it does not prevent vehicle access. Cross bar swings fully open and closed and prevents vehicle access. Locking mechanism does not lock gate Locking device missing, non-functioning or does not link to all parts. Locking mechanism prevents opening of gate. Support post damaged Support post does not hold cross bar up. Cross bar held up preventing vehicle access into facility. Bollards Damaged or missing bollards Bollard broken, missing, does not fit into support hole or hinge broken or missing. No access for motorized vehicles to get into facility. Bollards do not lock Locking assembly or lock missing or cannot be attached to lock bollard in place. No access for motorized vehicles to get into facility. Boulders Dislodged boulders Boulders not located to prevent motorized vehicle access. No access for motorized vehicles to get into facility. Evidence of vehicles circumventing boulders Motorized vehicles going around or between boulders. No access for motorized vehicles to get into facility. APPENDIX A MAINTENANCE REQUIREMENTS FOR STORMWATER FACILITIES AND ON-SITE BMPS 2022 City of Renton Surface Water Design Manual 6/22/2022 A-17 NO. 11 – GROUNDS (LANDSCAPING) MAINTENANCE COMPONENT DEFECT OR PROBLEM CONDITIONS WHEN MAINTENANCE IS NEEDED RESULTS EXPECTED WHEN MAINTENANCE IS PERFORMED Site Trash and debris Any trash and debris which exceed 1 cubic foot per 1,000 square feet (this is about equal to the amount of trash it would take to fill up one standard size office garbage can). In general, there should be no visual evidence of dumping. Trash and debris cleared from site. Noxious weeds Any noxious or nuisance vegetation which may constitute a hazard to City personnel or the public. Noxious and nuisance vegetation removed according to applicable regulations. No danger of noxious vegetation where City personnel or the public might normally be. Contaminants and pollution Any evidence of contaminants or pollution such as oil, gasoline, concrete slurries or paint. Materials removed and disposed of according to applicable regulations. Source control BMPs implemented if appropriate. No contaminants present other than a surface oil film. Excessive growth of grass/groundcover Grass or groundcover exceeds 18 inches in height. Grass or groundcover mowed to a height no greater than 6 inches. Trees and Shrubs Hazard tree identified Any tree or limb of a tree identified as having a potential to fall and cause property damage or threaten human life. A hazard tree identified by a qualified arborist must be removed as soon as possible. No hazard trees in facility. Damaged tree or shrub identified 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. No blown down vegetation or knocked over vegetation. Trees or shrubs 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; dead or diseased trees removed. APPENDIX A MAINTENANCE REQUIREMENTS FOR STORMWATER FACILITIES AND ON-SITE BMPS 6/22/2022 2022 City of Renton Surface Water Design Manual A-18 NO. 12 – ACCESS ROADS MAINTENANCE COMPONENT DEFECT OR PROBLEM CONDITION WHEN MAINTENANCE IS NEEDED RESULTS EXPECTED WHEN MAINTENANCE IS PERFORMED Site 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 drivable by maintenance vehicles. Debris which could damage vehicle tires or prohibit use of road. Roadway drivable by maintenance vehicles. Contaminants and pollution Any evidence of contaminants or pollution such as oil, gasoline, concrete slurries or paint. Materials removed and disposed of according to applicable regulations. Source control BMPs implemented if appropriate. No contaminants present other than a surface oil film. Blocked roadway 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. At least 12-foot of width on access road. Road Surface Erosion, settlement, potholes, soft spots, ruts Any surface defect which hinders or prevents maintenance access. Road drivable by maintenance vehicles. Vegetation on road surface Trees or other vegetation prevent access to facility by maintenance vehicles. Maintenance vehicles can access facility. Shoulders and Ditches Erosion Erosion within 1 foot of the roadway more than 8 inches wide and 6 inches deep. Shoulder free of erosion and matching the surrounding road. Weeds and brush Weeds and brush exceed 18 inches in height or hinder maintenance access. Weeds and brush cut to 2 inches in height or cleared in such a way as to allow maintenance access. Modular Grid Pavement Contaminants and pollution Any evidence of contaminants or pollution such as oil, gasoline, concrete slurries or paint. Materials removed and disposed of according to applicable regulations. Source control BMPs implemented if appropriate. No contaminants present other than a surface oil film. Damaged or missing blocks/grids Access surface compacted because of broken on missing modular block. Access road surface restored so road infiltrates. APPENDIX A MAINTENANCE REQUIREMENTS FOR STORMWATER FACILITIES AND ON-SITE BMPS 6/22/2022 2022 City of Renton Surface Water Design Manual A-48 NO. 39 – RETAINED TREES MAINTENANCE COMPONENT DEFECT OR PROBLEM CONDITIONS WHEN MAINTENANCE IS NEEDED RESULTS EXPECTED WHEN MAINTENANCE IS PERFORMED Tree Dead or declining Dead, damaged, or declining Tree replaced per planting plan or acceptable substitute NO. 40 – FILTERRA SYSTEM MAINTENANCE COMPONENT DEFECT OR PROBLEM CONDITION WHEN MAINTENANCE IS NEEDED RESULTS EXPECTED WHEN MAINTENANCE IS PERFORMED In addition to the specific maintenance criteria provided below, all manufacturer’s requirements shall be followed. Facility – General Requirements Life cycle Once per year, except mulch and trash removal twice per year Facility is re-inspected and any needed maintenance performed Contaminants and pollution Any evidence of contaminants or pollution such as oil, gasoline, concrete slurries, or paint Materials removed and disposed of according to applicable regulations. Source control BMPs implemented if appropriate. No contaminants present other than a surface oil film. Inlet Excessive sediment or trash accumulation Accumulated sediments or trash impair free flow of water into system Inlet should be free of obstructions allowing free distributed flow of water into system Mulch Cover Trash and floatable debris accumulation Excessive trash and/or debris accumulation Minimal trash or other debris on mulch cover. Mulch cover raked level. “Ponding” of water on mulch cover “Ponding” in unit could be indicative of clogging due to excessive fine sediment accumulation or spill of petroleum oils Stormwater should drain freely and evenly through mulch cover Proprietary Filter Media/ Vegetation Substrate “Ponding” of water on mulch cover after mulch cover has been maintained Excessive fine sediment passes the mulch cover and clogs the filter media/vegetative substrate Stormwater should drain freely and evenly through mulch cover. Replace substrate and vegetation when needed Vegetation Plants not growing or in poor condition Soil/mulch too wet, evidence of spill, incorrect plant selection, pest infestation, and/or vandalism to plants Plants should be healthy and pest free Media/mulch too dry Irrigation is required Plants absent Plants absent Appropriate plants are present Excessive plant growth Excessive plant growth inhibits facility function or becomes a hazard for pedestrian and vehicular circulation and safety Pruning and/or thinning vegetation maintains proper plant density. Appropriate plants are present. Structure Structure has visible cracks Cracks wider than ½ inch Evidence of soil particles entering the structure through the cracks Structure is sealed and structurally sound