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Home My WebLink AboutRS_Dulay_TIR_Stormwater_Site_Plan_Report_250808_v1 TABLE OF APPENDICES APPENDIX A – MAPS AND FIGURES FIGURE A1 – VICINITY MAP FIGURE A2 – STORMWATER SITE PLAN FIGURE A3 – TOPOGRAPHY MAP FIGURE A4 – EXISTING SITE CONDITIONS MAP FIGURE A5 – CITY OF RENTON SENSITIVE AREA - LANDSLIDE HAZARD MAP FIGURE A6 – CITY OF RENTON REGULATED SLOPE MAP FIGURE A7 – EXISTING CONDITIONS THRESHOLD DISCHARGE AREA MAP FIGURE A8 – DEVELOPED CONDITIONS THRESHOLD DISCHARGE AREA MAP FIGURE A9 – TIR WORKSHEET FIGURE A10 – FLOW CHART FOR DETERMINING REVIEW TYPE AND CORE REQUIREMENTS APPENDIX B – SOIL ASSESSMENTS FIGURE B1 – COBALT GEOSCIENCES GEOTECHNICAL EVALUATION (APRIL 10TH, 2025) FIGURE B2 – SOILS ASSESSMENT BY BRUCE MACVEIGH P.E. (MAY 9TH, 2022) FIGURE B3 – NRCS SOILS MAP APPENDIX C – DOWNSTREAM ANALYSIS FIGURE C1 - DOWNSTREAM ANALYSIS SUPPORTING DOCUMENTS APPENDIX D – WWHM REPORT CALCULATIONS FIGURE D1 – WWHM REPORT FOR ALL TDA’S FIGURE D2 – WWHM REPORT FOR TDA #1 FIGURE D3 – WWHM REPORT FOR TDA #2 FIGURE D4 – WWHM REPORT FOR TDA #3 TABLE OF CONTENTS PAGE 1.0 – PROJECT OVERVIEW 1-3 2.0 – CONDITIONS AND REQUIREMENTS SUMMARY 3.0 – OFF-SITE ANALYSIS 4.0 – FLOW CONTROL AND WATER QUALITY FACILITY ANALYSIS AND DESIGN 5.0 – CONVEYANCE SYSTEM ANALYSIS AND DESIGN 6.0 – SPECIAL REPORTS AND STUDIES 7.0 – OTHER PERMITS 8.0 – TESC ANALYSIS AND DESIGN 9.0 – BOND QUANTITIES, FACILITY SUMMARIES, AND DECLARATION OF COVENANT 10.0 – OPERATIONS AND MAINTENANCE MANUAL 3-9 9-10 10-13 14 14 14 14 14 14 Page 1 DULAY 102ND AVENUE SE SUBDIVISION TECHNICAL INFORMATION REPORT 1.0 PROJECT OVERVIEW This report accompanies the Preliminary Plat Application prepared for the Dulay 102nd Avenue Southeast Subdivision project on parcels 3223059028 and 3223059285 in Renton, Washington. The project has been designed to meet the requirements of the 2022 Renton Surface Water Design Manual (RSWDM). FIGURE 1 – VICINITY MAP The existing parcel 0.396-acre site is a developed single-family residential lot containing a single-family residential dwelling that will be removed as part of this development. This parcel is located at 18845 102nd Avenue SE, Renton, WA. The parcel number associated with this address is 3223059285. The existing parcel is a vacant parcel with no assigned address and is 0.78-acres in size. These parcels share two common boundary lines and will be developed together making the total on-site development 1.18-acres. Page 2 All neighboring parcels are developed as single-family residential lots. The proposed development has frontage on 102nd Avenue Southeast along the eastern property lines. Frontage improvements are required for this development. The calculated area for frontage improvements is 0.06-acres. The project will consist of dividing the two lots into four single-family residential lots accessed through a twenty-foot-wide private access roadway connecting to 102nd Avenue Southeast. Additionally, a stormwater tract will be provided in the northeastern portion of the development. Stormwater runoff from the new residence roof areas will be conveyed to this proposed stormwater tract. The stormwater from the frontage improvements will be conveyed to the city’s existing stormwater infrastructure. Predeveloped land (including frontage area) cover characteristics are provided below in Table 1. TABLE 1. PREDEVELOPED AREAS Description Area (ft2) Total (ft2) Pervious - On-site Forest, Type C 51,271 53,719 Pervious – Off-site Forest, Type C 2,448 The soils present on the project site are identified in the NRCS soil survey as Alderwood gravelly sandy loam (AgC). The geotechnical report prepared by Cobalt Geosciences on April 10th, 2025 (Appendix B, Figure B1) characterized the soils as loose to medium dense, silty-fine to medium-grained sand with gravel, yellowish-brown to grayish- brown (Weathered Glacial Till) transitioning to a dense, silty-fine to medium-grained sand with gravel, grayish-brown (Glacial Till). The Cobalt Geosciences report specified that groundwater was not encountered at the location of Test Pit 3. Test Pits 1 and 2 both encountered groundwater during exploration. Importing of fill material is anticipated for site grading. This fill material will ensure that proper separation has been achieved from porous pavement facilities base elevations and the seasonal high groundwater elevation. A previous soils assessment by Bruce MacVeigh P.E. on May 9th, 2022 (Appendix B, Figure B2) was conducted in a similar location as the Cobalt Geosciences Test Pit 3 location. The assessment resulted in similar results for the Test Pit 3 location. This assessment has been provided as supporting documentation confirming that no groundwater has been observed in the vicinity of Test Pit-3 location. Page 3 TABLE 2. DEVELOPED AREAS Description Area (ft2) Total (ft2) On-site Impervious Surfaces Lot 1 - Roof 2,000 3,302 Lot 1 - Driveway 1,302 Lot 2 - Roof 2,000 2,500 Lot 2 - Driveway 500 Lot 3 - Roof 2,000 2,500 Lot 3 - Driveway 500 Lot 4 - Roof 2,000 2,975 Lot 4 - Driveway 975 Roadway - Private 7,220 7,220 On-site Pervious Surfaces Landscaping - Lawn 17,529 32,774 Undeveloped Vegetation 15,245 Off-site Impervious Surfaces Roadway - Public 226 1,176 Private Road Access 250 Sidewalk 700 Off- Site Pervious Surfaces Landscaping Strip 1,272 1,272 53,719 The general slope of the land is from east to west with a low point centralized between the north and south property lines on the western property line. A gradual slope of 3 percent increases to approximately 14 percent starting roughly 90 feet east of the western boundary line. Historical stormwater runoff from this 1.18-acre site flow to the west over and through vegetated grass and forested lands prior to descending down the steeper-sloped portion of the parcel. This has been depicted in the Existing Conditions Threshold Discharge Area Map provided in Appendix A (Figure A7). Based on the City of Renton GIS Mapping System, this development site contains regulated slopes from 15 percent to 25 percent along the western project boundary line (Appendix A, Figure A6). There are also regulated landslide hazard areas within approximately 300-feet of the project, this has been depicted in the City of Renton Sensitive Areas Map provided in Appendix A (Figure A5). The Cobalt Geosciences Geotechnical Evaluation Report, dated April 10th, 2025 (Appendix B, Figure B1) has been provided and defines additional precautions required for the construction of this development. It is the intent of this development to direct development flows away from the sloped areas of this project. The steeper sloped portion of the site will remain heavily vegetated throughout the development of this project. The proposed development anticipates to greatly reduce the stormwater runoff that discharges to the western boundary line, as a result reducing the risk for potential erosion and sediment Page 4 displacement from stormwater runoff over regulated slopes. The proposed gravel-bed infiltration facility is projected to be greater than 100 feet from areas identified as regulated slopes. On-site soils are identified in the NRCS Soil Survey as primarily Alderwood gravelly, sandy loam (type C soil). A copy of the Geotechnical Engineering Reports and the NRCS soil survey map are provided in Appendix B. 2.0 CONDITIONS AND REQUIREMENTS SUMMARY The City of Renton’s “Flow Chart for Determining Types of Drainage Review” (Appendix A, Figure A10) indicates that since the development proposes more than 7,000 square feet of disturbed area and is a short plat and not a single-family residential project which is less than 50-acres, this project will require a “Full Drainage Review.” This report will demonstrate how this development intends to comply with Core Requirements 1 through 9 and Special Requirements 1 through 6, as follows: Core Requirement #1: Discharge at Natural Location This project will continue to discharge to the natural locations or be infiltrated into on- site soils. More detailed information is provided in Chapter 4 of this report. Core Requirement #2: Off-site Analysis The off-site system analysis is included in Section 3.0 of this report. Core Requirement #3: Flow Control The overall proposed development requires the designed improvements to meet the flow control requirements per the 2022 Renton Surface Water Design Manual (RSWDM). Three TDA’s have been identified with some remaining in natural conditions and having runoff reduced, some providing infiltration facilities to meet flow control requirements, and some being exempt from flow control requirements. Detailed information is included in Chapter 4 of this report. Core Requirement #4: Conveyance System The conveyance system for this project consists of PVC pipes. They are sized appropriately to handle the stormwater that is anticipated. Page 5 Core Requirement #5: Erosion and Sediment Control Erosion and sediment control requirements will be met for this project as described in Section 4.0. Core Requirement #6: Maintenance and Operations The on-site stormwater features will be maintained privately by the property owners. Operations and Maintenance provisions will be addressed in under the civil construction submittal. Core Requirement #7: Financial Guarantees and Liability A bond quantities worksheet will be provided at the time of the civil construction permit application. Core Requirement #8: Water Quality TDA #1 is exempt from water quality requirements because no new impervious surfaces or new PGPS will be introduced within this TDA. TDA #2 is required to comply with water quality requirements. The development within TDA #2 intends to provide water quality through the use of permeable pavement which will allow the flows from pollution-generating impervious surface (PGIS) to disperse evenly through the ballast coarse and infiltrate into the native soils. This stormwater BMP approach complies with the Water Quality requirements provided in the City of Renton Stormwater Design Manual. TDA #3 is also exempt from providing water quality per RSWDM section 1.2.8 (1) Surface Area Exemption. TDA #3 projects to introduce only 1,176 square feet of new impervious surfaces which is below the minimum threshold of 5,000 square feet of new plus replaced PGIS created and less than ¾ acres of new PGPS. It should be noted that the WWHM Report for All TDA’s (Figure D1, Appendix D) shows a water quality return of 100 percent treatment for this development. Core Requirement #9: On-site BMPs TDA #1 is exempt from On-site BMP requirements because no new impervious surfaces or less than 7,000 square feet of land disturbing activities are proposed for this TDA. Page 6 TDA #2 is required to provide On-site BMPs because this TDA introduces greater than 2,000 square feet of impervious surface. The TDA #2 will be providing permeable pavement as well as a gravel infiltration bed facility. TDA #3 is exempt from On-site BMPs requirements as this TDA basin has an area of only 2,448 square feet, which is less than the 7,000 square-foot threshold. TDA #3 only anticipates introducing approximately 1,176 square feet of new or replaced impervious surfaces. Special Requirement #1: Other Adopted Area-Specific Requirements There are no known area-specific special requirements that apply to this project site. Special Requirement #2: Flood Hazard Area Delineation There are no known flood hazard areas on or adjacent to this project. Special Requirement #3: Flood Protection Facilities Flood protection facility special requirements do not apply to this project. The project does not propose to construct a new or modify an existing flood protection facility. Special Requirement #4: Source Controls Since the proposed project is a single-family residence-based development, source control measures are not anticipated to be required in conjunction with this project. There is no significant proposed outside-use or storage of pollutants. This is not a commercial development therefore not meeting the minimum threshold requirement. Special Requirement #5: Oil Control The proposed project does not require oil control measures. The site is not considered high-use since it is a single-family residential project. Special Requirement #6: Aquifer Protection Areas The proposed project is not known to fall within the City’s Aquifer Protection Area (APA). 3.0 OFF-SITE ANALYSIS Downstream Basin: A Level 1 downstream analysis was completed for this project in March 2025. Page 7 A Level 1 downstream analysis was completed using information from City of Renton GIS information. The highest point of the developed site is at an elevation of approximately 415 feet along the northeast frontage. The site gently slopes from there to the west until approximately 50 feet from the western property line where the slope increases to between 10-18 percent slope. Historically, surface water flows in this westerly direction. This development does not propose to direct collected flows in this direction. The easterly frontage area of the site drains easterly to the right of way where it is collected by an existing public catch basin listed by the City of Renton as Reference number 117158 which has a rim elevation of 413.35’. From this catch basin the flow is conveyed across 102nd Avenue Southeast. Flows are then directed south down the eastern side of 102nd Avenue Southeast until the conveyed flows cross 102nd Avenue Southeast to the west at the intersection of SE 192nd Street and 102nd Avenue Southeast. This conveyance system continues to flow westerly through a combination of stormwater catch basins and open ditch lines for a distance greater than 3,200 linear feet where this flow is discharged to Springbrook Creek located at parcel number 3123059115. A City of Renton Downstream Conveyance Map has been provided in Appendix C - Figure C1 of this report. This analysis map illustrates the flows from the subject development downstream until it reaches approximately 0.25 miles downstream. Discharge from the western portion of the development disperses through a native forested area following the contours and historical natural flow paths. The flows that do not infiltrate into the natural forest turf appear to connect with the flows from the eastern portion of the site approximately ¼ mile downstream to the City of Renton conveyance system that traverses the South 192nd Street corridor. In reviewing the information available relating to the downstream system, there were no recent existing drainage problems found in the city’s complaint database and no significant problems are anticipated as a result of the improvements proposed as part of this project. Upstream Tributary Basin: There are no known concentrated sources of stormwater discharge to this property. 4.0 FLOW CONTROL AND WATER QUALITY FACILITY ANALYSIS AND DESIGN Flow Control Multiple WWHM analyses for this development are provided in Appendix D. Each individual TDA has been thoroughly analyzed as well as an overall development review and modeling of the proposed design to ensure compliance with the local stormwater requirements, as follows. Page 8 This site has historically been divided into two separate threshold discharge basins as depicted in the Existing Conditions - Threshold Discharge Area Map provided in Appendix A, Figure A7 and these are defined as followed: Threshold Discharge Area - On-site – historic flows are conveyed via sheet flow over native vegetation to the west down the slope toward the regulated slopes. Threshold Discharge Area – Off-site – is the frontage area associated with 102nd Avenue Southeast. This drainage area is a paved roadway, crowned at the centerline, with an average 6-foot-wide gravel shoulder and an existing stormwater conveyance system. No sidewalks are included in the existing conditions of this drainage basin. Existing stormwater runoff from this basin sheet flows to the south. The development of this site requires special consideration be given to the potential erosion control hazard and regulated slopes on-site with regard to stormwater runoff being discharged over and through these slopes. As a result of the special consideration, it has been determined that three Threshold Discharge Areas will be employed and analyzed for the design and development of this site. These TDA’s have been depicted in the Developed Conditions – Threshold Discharge Area Map located in Appendix A, Figure A8 and have been defined below: Threshold Discharge Area #1 (TDA #1): TDA #1 is approximately 15,245 square feet (0.35 acres) and includes the undeveloped areas along the western boundary line and regulated slope areas. This area will be protected from ground disturbance and will retain its vegetated state. The runoff tributary area will be reduced from 1.18 acres to approximately 0.35 acres. The projected reduction of modeled flow has been demonstrated below: TABLE 3. TDA #1 FLOW REDUCTION Historical Flow - 1.18 AC Reduced Flows TDA #1 - 0.35 AC Frequency Return (CFS) Frequency Return (CFS) 2-year 0.035 2-year 0.010 10-year 0.072 10-year 0.021 50–year 0.101 50–year 0.030 100-year 0.112 100-year 0.033 The above table demonstrates the approximately 70-percent reduction of tributary area and associated flows projected to discharge over and through the regulated slopes along the western portion of the site. Threshold Discharge Area #2 (TDA #2): TDA #2 is the remaining on-site area of the development totaling approximately 36,026 square feet (0.827 acres). Page 9 Stormwater runoff will be managed through infiltration BMPs as demonstrated later in this report. Stormwater facilities have been shown by modeling to infiltrate at 100 percent and, therefore, no discharge is projected from this TDA. This development intends to provide permeable pavement for the private roadway and for each driveway. The roof areas will be collected and conveyed away from the slopes, towards the proposed gravel-bed infiltration facility. This infiltration facility will be located over 100 feet from regulated sloped areas. Threshold Discharge Area #3 (TDA #3): TDA #3 is the frontage improvement area consisting of 2,448 square feet (0.056 acres). The historical flows from this area generally flow south with the contours of the current topography. The developed flows as a result of this project will be collected and conveyed to the City of Renton stormwater conveyance system per historical flow patterns. Under the existing conditions, the majority of the stormwater runoff from the on-site TDA’s naturally disperses toward the western edge of the property. This development intends to collect and convey developed stormwater runoff away from the slopes and towards the proposed stormwater facilities. The proposed roof drain infiltration facility will be located over 100 feet from regulated slope areas. Collecting and conveying the roof surface runoff will protect against runoff flowing to or over regulated slope areas. Runoff from Threshold Discharge Area #3 (TDA #3), the frontage improvements, will be collected and conveyed through the City of Renton stormwater system as per historical flow patterns, as stated above. The projected increase in flows based on the additional impervious surface is less than 0.15 cfs and, therefore, the TDA is exempt from providing flow control. This development will be providing infiltration BMPs to satisfy the flow control requirements for TDA #2, the on-site development area. TDA #1 and #3 do not meet the minimum threshold requirements required to implement flow control measures. This is demonstrated below. TDA #1 consists of existing slopes that are not projected to be altered throughout the course of this development. This TDA does not propose any new impervious surfaces. TDA #1 does project to discharge flows off-site, these flows have been reduced by approximately 70 percent from the existing conditions, as discussed above. A WWHM report has been provided in Appendix D, Figure D2 that illustrates the projected discharge from this TDA. TDA #2 contains the projected on-site improvements for this development and is required to meet flow control requirements. This development intends to provide infiltration facilities that the model indicates will infiltrate at 100 percent. Therefore, the stormwater flow control standards have been satisfied. Emergency overflow discharge Page 10 shall meet developed discharge durations which require not exceeding predeveloped durations for the range of predeveloped discharge rates from 50% of the 2-year peak flow up to the full 50-year peak flow. Developed peak discharge rates shall not exceed predeveloped peak discharge rates for the 2- and 10-year return periods. Modeling assumes forested (historical) site conditions as the predeveloped condition. No emergency discharge components have been modeled for the infiltration facilities. A WWHM report has been provided in Appendix D, Figure D3 that illustrates the projected discharge from this TDA as well as the modeled infiltration facilities. No projected discharge is anticipated from this TDA. TDA #3 consists of frontage improvements which will be collected and conveyed through the City of Renton stormwater conveyance system per historical flow patterns. A WWHM report has been provided in Appendix D, Figure D4 that illustrates the projected discharge from this TDA. TDA #3 projects to increase the flow rate over the historic condition’s 100-year peak rate flow by 0.025 cfs. Therefore, the targeted surfaces exemption applies. The reference exemption has been provided below: RSWDM 1.2.3.1 (A) Targeted Surfaces Exemptions: The facility requirement in Peak Rate Flow Control Standard Areas is waived for any threshold discharge area in which the target surfaces subject to this requirement will generate no more than a 0.15-cfs increase (when modeled using 15-minute time steps) in the existing site conditions 100 - year peak flow (modeled using same time step unit (e.g., 15 -minute) used to calculate the developed flow). Each TDA has been modeled individually to accurately account for each TDA’s discharge. In addition to the individual modeled TDA’s, a full-site modeling has been provided to demonstrate the total stormwater discharge from the entire development. This report can be found in Appendix D, Figure D1. Each provided WWHM report illustrates that the 15-minute, 100-year peak flow rate under historic, forested site conditions from the area that will be disturbed by this project will not be surpassed by the 15-minute, 100-year peak flow rate under developed conditions by more than 0.15 cfs. The on-site development portion (TDA #2) of this project proposes infiltration BMPs to meet flow control requirements. The proposed private road and connected driveways have been modeled as permeable pavement infiltrating at 100 percent. A gravel infiltration bed has also been modeled at 100 percent infiltration for the anticipated roof areas of this development. The WWHM Report for TDA #2 has been included in Appendix D – Figure D3. Therefore, meeting the requirements of flow control per the City of Renton Stormwater Design Manual. The on-site pre-development conditions were modeled using forested conditions. Page 11 Threshold Discharge Area #1 (TDA #1): TDA #1 is approximately 15,245 square feet (0.35 acres), and includes the undeveloped areas along the western boundary line and regulated slope areas. This area will be protected from ground disturbance and will retain its vegetated state. The runoff tributary area will be reduced from 1.177 acres to approximately 0.35 acres. TDA #1 has been analyzed and determined to be exempt from flow control and water quality requirements as discussed elsewhere in this report. TDA #1 has been modeled as 0.35 acres to determine the revised anticipated flow to be discharged. TDA #1 has been modeled as follows: Total Modeled as Impervious Lawn Forest Removed C, Forest, Mod 0.350 acres 0.000 acres 0.000 acres 0.350 acres 0.000 acres Totals 0.350 acres 0.000 acres 0.000 acres 0.350 acres 0.000 acres TDA #1’s WWHM Report can be found in Appendix D, Figure D2 of this report. Threshold Discharge Area #2 (TDA #2): TDA #2 is the on-site area of the development totaling approximately 36,026 square feet (0.827 acres). Stormwater runoff will be managed through infiltration BMPs. Stormwater facilities have been modeled to infiltrate at 100 percent, therefore no discharge from this TDA will discharge from this basin. This development intends to provide permeable pavement for the private roadway and for each driveway. The roof areas will be collected and conveyed away from the slopes, towards the proposed gravel-bed infiltration facility. Water quality and flow control requirements have been met by the use of the proposed infiltration BMP’s. This infiltration facility will be located over 100-feet from regulated sloped areas. TDA #2 existing conditions have been modeled as C, Forest, Mod as follows: Total Modeled as Impervious Lawn Porous Pavement Roof 0.184 acres 0.184 acres 0.000 acres 0.000 acres Porous Driveway 0.075 acres 0.000 acres 0.000 acres 0.075 acres Porous PVT Roadway 0.166 acres 0.000 acres 0.000 acres 0.166 acres Vegetation 0.402 acres 0.000 acres 0.402 acres 0.000 acres Totals 0.827 acres 0.184 acres 0.402 acres 0.241 acres TDA #2 WWHM Report can be found in Appendix D, Figure D3 of this report. Threshold Discharge Area #3 (TDA #3): TDA #3 is the frontage improvement area consisting of 2,448 square feet (0.0562 acres) of required improvements. The historical flows from this area generally flow south with the contours of the current topography. The developed flows as a result of this project will be collected and conveyed to the City of Renton stormwater conveyance system per historical flow patterns. TDA #3 has been analyzed and determined to be exempt from flow control and water quality Page 12 requirements as previously stated in this report. TDA #3 existing conditions have been modeled as C, Forest, Mod as follows: Total Modeled as Impervious Lawn Removed Roadway 0.00519 acres 0.00519 acres 0.000 acres 0.000 acres Driveway 0.0057 acres 0.0057 acres 0.000 acres 0.000 acres Sidewalk 0.0161 acres 0.0161 acres 0.000 acres 0.000 acres Vegetation 0.02921 acres 0.000 acres 0.02921 acres 0.000 acres Totals 0.0562 acres 0.02699 acres 0.02921 acres 0.000 acres TDA #3 WWHM Report can be found in Appendix D, Figure D4 of this report. Each TDA has been modeled individually to accurately account for each TDA’s discharge and compliance with flow control and water quality requirements. In addition, a full site development WWHM modeling report has been provided to demonstrate compliance with local stormwater regulations and the total stormwater discharge from the proposed development, this report can be found in Appendix D, Figure D1. Each provided WWHM report illustrates that the 15-minute, 100-year peak flow rate under historic, forested site conditions from the area that will be disturbed by this project will not be surpassed by the 15-minute, 100-year peak flow rate under developed conditions by more than 0.15 cfs. The above modeled facilities and the supporting documents demonstrates compliance with the flow control and water quality requirements defined by the City of Renton Stormwater Design Manual. BMPs: Section C.1.3.1 of the RSWDM applies to projects on lots smaller than 22,000 square feet. Section C.1.3.1 state that, if the proposed project is on a site/lot smaller than 22,000 square feet, then flow control BMPs must be applied as specified in Section C.1.3.1 or the project must comply with the LID performance standard. This project proposes to apply small lot BMPs to the greatest extent feasible. Mitigation of new/replaced impervious surface: This project is required to apply BMPs from the Small Lot BMP Requirements in Section C.1.3.1 of Appendix C of the RSWDM. The feasibility of each of those BMPs, in the order of preference required by the manual, is discussed below. Page 13 Full Dispersion: It is infeasible to implement full dispersion BMP as detailed in Section C.2.1.1 because the native vegetative flow path for full dispersion is required to be at least 100 feet in length, which is not available on the project site. Full Infiltration: Full infiltration BMPs are feasible, based on information received from the Cobalt Geosciences Geotechnical Evaluation Report, dated April 10th, 2025, and the previous soils assessment by Bruce MacVeigh P.E. on May 9th, 2022. Permeable pavement is a feasible option for each individual driveway as well as the private roadway. An infiltration gravel bed has also been deemed feasible based on the location of the facility and supporting data provided by the soils assessment by Bruce MacVeigh P.E. This infiltration gravel bed will infiltrate the projected roof areas for each proposed newly created lot up to 2,000 square feet of roof area per lot. Additional reserve areas have been provided within the stormwater tract in the case that combined roof areas exceed 8,000 square feet. Permeable Pavement: It has been determined to be feasible to implement permeable pavement BMP. The proposed individual driveways and the proposed private roadway will be constructed as permeable pavement. This has been modeled show 100 percent infiltration. Additional subgrade preparation and fill soils are anticipated to ensure sloped and restrictive layer separation requirements have been achieved. Mitigation of Water Quality Impacts: Mitigation will be based on the development TDA’s. TDA’s requiring mitigation will provide water quality measures through the proposed infiltration BMPs discussed above. 5.0 CONVEYANCE SYSTEM ANALYSIS AND DESIGN The conveyance system for this project consists of PVC pipes for stormwater conveyance. They are sized appropriately to handle the stormwater that is anticipated. 6.0 SPECIAL REPORTS AND STUDIES A geotechnical report and supplemental soil assessments have been provided in Appendix B. 7.0 OTHER PERMITS A civil construction application for the development of this project will be required. Building permits for the future single-family residence will also be required for this project. Page 14 8.0 ESC ANALYSIS AND DESIGN Erosion and sediment control requirements will include the delineation of clearing limits via flagging, proper cover measures for the protection of disturbed areas, perimeter protection with silt fencing on an as-needed basis, and a stabilized construction entrance per City of Renton standards. The Erosion and Sediment Control Plan will be included as part of the Civil Engineering Construction Application. 9.0 BOND QUANTITIES, FACILITY SUMMARIES, AND DECLARATION OF COVENANT A bond quantities worksheet will be provided upon civil construction application submittal. 10.0 OPERATIONS AND MAINTENANCE MANUAL The stormwater BMPs proposed for this project will be maintained privately by the property owners. The Operations and Maintenance Manual will be provided upon civil construction application submittal. APPENDIX A: MAPS AND FIGURES King County Dulay - Vicinity Map Date: 3/14/2025 Notes:±The information included on this map has been compiled by King County staff from a variety of sources and is subject to change without notice. King Countymakes no representations or warranties, express or implied, as to accuracy, completeness, timeliness, or rights to the use of such information. This document isnot intended for use as a survey product. King County shall not be liable for any general, special, indirect, incidental, or consequential damages including,but not limited to, lost revenues or lost profits resulting from the use or misuse of the information contained on this map. Any sale of this map or information onthis map is prohibited except by written permission of King County. Project Location Figure A1 Figure A2 King County Dulay - Topography Map Date: 3/14/2025 Notes:±The information included on this map has been compiled by King County staff from a variety of sources and is subject to change without notice. King Countymakes no representations or warranties, express or implied, as to accuracy, completeness, timeliness, or rights to the use of such information. This document isnot intended for use as a survey product. King County shall not be liable for any general, special, indirect, incidental, or consequential damages including,but not limited to, lost revenues or lost profits resulting from the use or misuse of the information contained on this map. Any sale of this map or information onthis map is prohibited except by written permission of King County. Figure A3 PROJECT LOCATION EX I S T I N G C O N D I T I O N S & Figure A4 k k k k k k k k k k k k k k k k k k k k k k k k k k k kk k k k k k k k k k k k k k k k k k k k HoquiamAveNE E Va l l e y H w y 84thAveS NEParkDr SW 7th St SE 128th St SE 192nd St Lind A ve S W MainAveS S 132nd St Factory PlN Tal bot R d S N 3rd St RainierAveS 164thAveSE TukwilaPkwy SPugetDr NE 4th St S 3rd St S 1 2 9 th S t 68th AveS SWSunsetBlvd SW 16th St 116th AveSE N 4th St In t e r u r b a n A v e S WilliamsAve N Bronson Wa y N NE7thSt 124th Ave SE S 7th St S E Rento n IssaquahRd R ain i e r AveN Newcastle Way Coal Cre ek Pkwy S E SW 41st St Ta y l o r P l N W NESunsetBlvd Wells AveN Union Ave NE NE 3rd St H ardie Av e SW S180th St Maple V a l l e y H w y 140thAveSE S G r a d y W ay S 2 1 s t St BensonRdS Rento n Ave S 87thAveS 128thAveSE 148thAveSE SW 43rd St SE C arr Rd SE 168thSt Beacon Ave S 68thAve S LoganAve N 108thAveSE ForestDrSE S2ndSt 141s t AveSE RainierAveS 156th Ave SE S E 183rdSt B e n s o n D r S S124thSt S 43rd St Airport Way S W G ra d y W a y SE J o n es Rd Sunset Blv d N Puge t D r S E SE 204th W a y SW 34th St M o n sterRdSW SE 142nd Pl WestValley HwyS SEMayValleyRd SunsetBlvdN S Carr R d HouserWayN NewcastleGolfClubRd S 133rd St Williams Ave S Wells AveS EMercerWay 154thPlSE DuvallAve NE LoganAveS MonroeAveNE SunsetBlvdNE Edmonds Ave NE St e v e n s A v e NW R ainie r AveS Ta lbot RdS OakesdaleAve SW TaylorAveNW 164thAveSE RainierAveS West Va lle y Hw y WestValleyHwy ParkAveN 108th Ave SE 6 6th A v e S W MercerWay WMercer W ay La k e m ont B lvd SE 13 2 n d Av e S E LakeWashington BlvdNE 140thWaySE Ea s t V a l l e y R d 68thAveS ³City of RentonSensitive Areas 0 0.5 10.25 Miles Information Technology - GISmapsupport@rentonwa.govPrinted on: 11/12/2014 Data Sources: City of Renton, King County This document is a graphic representation, not guaranteedto survey accuracy, and is based on the best informationavailable as of the date shown. This map is intended forCity display purposes only. Renton City Limits k Education Fire Station K Valley Medical Center Landslide HazardSeverityVery HighHighModerateUnclassified Coordinate System: NAD 1983 HARN StatePlane Washington North FIPS 4601 FeetProjection: Lambert Conformal ConicDatum: North American 1983 HARN Project Location Project Location Project Outside of Landslide Hazard Area City of Renton Sensitive Area: Landslide Hazard Map Figure A5 1,128188 Regulated Slope Map 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. WGS_1984_Web_Mercator_Auxiliary_Sphere Notes None Legend 128 0 64 128 Feet City and County Labels Addresses Parcels City and County Boundary Renton <all other values> Landslide Very High High Moderate Unclassified Slope City of Renton >15% & <=25% >25% & <=40% (Sensitive) >40% & <=90% (Protected) >90% (Protected) Streams (Classified) S - Shoreline F - Fish Np - Non-Fish Ns - Non-Fish Seasonal Unclassfied 2' Primary 2' Intermediate Streets 2023.sid Red: Band_1 Green: Band_2 Blue: Band_3 Figure A6 Project Location King County Date: 3/14/2025 Notes:±The information included on this map has been compiled by King County staff from a variety of sources and is subject to change without notice. King Countymakes no representations or warranties, express or implied, as to accuracy, completeness, timeliness, or rights to the use of such information. This document isnot intended for use as a survey product. King County shall not be liable for any general, special, indirect, incidental, or consequential damages including,but not limited to, lost revenues or lost profits resulting from the use or misuse of the information contained on this map. Any sale of this map or information onthis map is prohibited except by written permission of King County. Existing Conditions - Threshold Discharge Area Map Project Location Existing Threshold Discharge Area - On-site Existing Threshold Discharge Area - Off-site Point of Natural Discharge Figure A7 100'-0" 25 ' - 0 " D D D D D D D D D D D D D D D D D D D D D 25'W x 100'L x 2'D GRAVEL BE D POROUS CONCRETE - 8" THICK WITH 12" MINIMUM GRAVEL BALLAST 128 128 128 128 12 6 12 6 12 6 12 4 12 4 12 4 12 2 12 2 1 2 2 128 TDA #1 15,245 SQFT TDA #2 36,026 SQFT TD A # 3 2, 4 4 8 S Q F T DEVELOPED CONDITIONS - THRESHOLD DISCHARGE AREA MAP TDA #1 - DISCHARGES SURFACES TO HISTORICAL DRAINAGE POINT (WESTERN PROPERTY LINE) TDA #2 - INFILTRATES ALL SURFACE AREAS TDA #3 - COLLECTS AND CONVEYS NEW SURFACES TO CITY CONVEYANCE SYSTEM EXHIBIT NOT TO SCALE Point of Natural Discharge Point of Natural Discharge Figure A8 CITY OF RENTON SURFACE WATER DESIGN MANUAL 2022 City of Renton Surface Water Design Manual 6/22/2022 8-A-1 REFERENCE 8-A TECHNICAL INFORMATION REPORT (TIR) WORKSHEET Part 1 PROJECT OWNER AND PROJECT ENGINEER Part 2 PROJECT LOCATION AND DESCRIPTION Project Owner _____________________________ Phone ___________________________________ Address __________________________________ _________________________________________ Project Engineer ___________________________ Company _________________________________ Phone ___________________________________ Project Name __________________________ CED Permit # ________________________ Location Township ________________ Range __________________ Section _________________ Site Address __________________________ _____________________________________ Part 3 TYPE OF PERMIT APPLICATION Part 4 OTHER REVIEWS AND PERMITS  Land Use (e.g., Subdivision / Short Subd.)  Building (e.g., M/F / Commercial / SFR)  Grading  Right-of-Way Use  Other _______________________  DFW HPA  COE 404  DOE Dam Safety  FEMA Floodplain  COE Wetlands  Other ________  Shoreline Management  Structural Rockery/Vault/_____  ESA Section 7 Part 5 PLAN AND REPORT INFORMATION Technical Information Report Site Improvement Plan (Engr. Plans) Type of Drainage Review (check one): Date (include revision dates): Date of Final:  Full  Targeted  Simplified  Large Project  Directed __________________ __________________ __________________ Plan Type (check one): Date (include revision dates): Date of Final:  Full  Modified  Simplified __________________ __________________ __________________ Rupinder Dulay (206) 271-6126 5647 Lake Washington Boulevard SE Bellevue, WA 98006 AP Consulting Engineers PLLC Adam E. Paul P.E. 253-737-4173 X X X Dulay 102nd Ave Subdivision 18845 & 18855 102nd Avenue SE Renton, WA 98055 PRE25-000040 23 N 5 E 32 Figure A9 REFERENCE 8: PLAN REVIEW FORMS AND WORKSHEET TECHNICAL INFORMATION REPORT (TIR) WORKSHEET 6/22/2022 2022 City of Renton Surface Water Design Manual 8-A-2 Part 6 SWDM ADJUSTMENT APPROVALS Type (circle one): Standard / Blanket Description: (include conditions in TIR Section 2) ____________________________________________________________________________________ ____________________________________________________________________________________ ____________________________________________________________________________________ Approved Adjustment No. ______________________ Date of Approval: _______________________ Part 7 MONITORING REQUIREMENTS Monitoring Required: Yes / No Start Date: _______________________ Completion Date: _______________________ Describe: _________________________________ _________________________________________ _________________________________________ Re: SWDM Adjustment No. ________________ Part 8 SITE COMMUNITY AND DRAINAGE BASIN Community Plan: ____________________________________________________________________ Special District Overlays: ______________________________________________________________ Drainage Basin: _____________________________________________________________________ Stormwater Requirements: _____________________________________________________________ Part 9 ONSITE AND ADJACENT SENSITIVE AREAS  River/Stream ________________________  Lake ______________________________  Wetlands ____________________________  Closed Depression ____________________  Floodplain ___________________________  Other _______________________________ _______________________________  Steep Slope __________________________  Erosion Hazard _______________________  Landslide Hazard ______________________  Coal Mine Hazard ______________________  Seismic Hazard _______________________  Habitat Protection ______________________  _____________________________________ No Adjustments Requested Talbot N/A Duwamish - Green River Core Requirements 1-9 and Special Requirements 1-6 X X X Off-site within 300' On-site On-site REFERENCE 8-A: TECHNICAL INFORMATION REPORT (TIR) WORKSHEET TECHNICAL INFORMATION REPORT (TIR) WORKSHEET 2022 City of Renton Surface Water Design Manual 6/22/2022 Ref 8-A-3 Part 10 SOILS Soil Type ______________________ ______________________ ______________________ ______________________ Slopes ________________________ ________________________ ________________________ ________________________ Erosion Potential _________________________ _________________________ _________________________ _________________________  High Groundwater Table (within 5 feet)  Other ________________________________  Sole Source Aquifer  Seeps/Springs  Additional Sheets Attached Part 11 DRAINAGE DESIGN LIMITATIONS REFERENCE  Core 2 – Offsite Analysis_________________  Sensitive/Critical Areas__________________  SEPA________________________________  LID Infeasibility________________________  Other________________________________  _____________________________________ LIMITATION / SITE CONSTRAINT _______________________________________ _______________________________________ _______________________________________ _______________________________________ _______________________________________ _______________________________________  Additional Sheets Attached Part 12 TIR SUMMARY SHEET (provide one TIR Summary Sheet per Threshold Discharge Area) Threshold Discharge Area: (name or description) Core Requirements (all 9 apply): Discharge at Natural Location Number of Natural Discharge Locations: Offsite Analysis Level: 1 / 2 / 3 dated:__________________ Flow Control (include facility summary sheet) Standard: _______________________________ or Exemption Number: ____________ Conveyance System Spill containment located at: _____________________________ Erosion and Sediment Control / Construction Stormwater Pollution Prevention CSWPP/CESCL/ESC Site Supervisor: _____________________ Contact Phone: _________________________ After Hours Phone: _________________________ Maintenance and Operation Responsibility (circle one): Private / Public If Private, Maintenance Log Required: Yes / No Financial Guarantees and Liability Provided: Yes / No X 8 to 15 percent slopeAlderwood Gravelly Sandy Loam Yes Please review Cobalt Geoscience Geotechnical Report along with all other supporting soils analysis provided in Appendix B of the report See Appendix B for Full Geotechnical Report and supporting documents TDA #1 TDA #1: Consists of the Western undeveloped area totaling 0.35 Acres ***No proposed new Impervious Surface*** 1 March 2025 N/A TBD TBD TBD Exempt per RSWDM Section 1.2.3(1 & 2) REFERENCE 8: PLAN REVIEW FORMS AND WORKSHEET TECHNICAL INFORMATION REPORT (TIR) WORKSHEET 6/22/2022 2022 City of Renton Surface Water Design Manual 8-A-4 Part 12 TIR SUMMARY SHEET (provide one TIR Summary Sheet per Threshold Discharge Area) Water Quality (include facility summary sheet) Type (circle one): Basic / Sens. Lake / Enhanced Basic / Bog or Exemption No. _______________________ On-site BMPs Describe: Special Requirements (as applicable): Area Specific Drainage Requirements Type: SDO / MDP / BP / Shared Fac. / None Name: ________________________ Floodplain/Floodway Delineation Type (circle one): Major / Minor / Exemption / None 100-year Base Flood Elevation (or range): _______________ Datum: Flood Protection Facilities Describe: Source Control (commercial / industrial land use) Describe land use: Describe any structural controls: Oil Control High-Use Site: Yes / No Treatment BMP: _________________________________ Maintenance Agreement: Yes / No with whom? _____________________________________ Other Drainage Structures Describe: Exempt per RSWDM Section 1.2.8(1) N/A N/A Residential N/A N/A TDA #1 will remain in it's native conditions - No Development in this area Part 12 TIR SUMMARY SHEET (provide one TIR Summary Sheet per Threshold Discharge Area) Threshold Discharge Area: (name or description) Core Requirements (all 9 apply): Discharge at Natural Location Number of Natural Discharge Locations: Offsite Analysis Level: 1 / 2 / 3 dated:__________________ Flow Control (include facility summary sheet) Standard: _______________________________ or Exemption Number: ____________ Conveyance System Spill containment located at: _____________________________ Erosion and Sediment Control / Construction Stormwater Pollution Prevention CSWPP/CESCL/ESC Site Supervisor: _____________________ Contact Phone: _________________________ After Hours Phone: _________________________ Maintenance and Operation Responsibility (circle one): Private / Public If Private, Maintenance Log Required: Yes / No Financial Guarantees and Liability Provided: Yes / No Part 12 TIR SUMMARY SHEET (provide one TIR Summary Sheet per Threshold Discharge Area) Water Quality (include facility summary sheet) Type (circle one): Basic / Sens. Lake / Enhanced Basic / Bog or Exemption No. _______________________ On-site BMPs Describe: Special Requirements (as applicable): Area Specific Drainage Requirements Type: SDO / MDP / BP / Shared Fac. / None Name: ________________________ Floodplain/Floodway Delineation Type (circle one): Major / Minor / Exemption / None 100-year Base Flood Elevation (or range): _______________ Datum: Flood Protection Facilities Describe: Source Control (commercial / industrial land use) Describe land use: Describe any structural controls: Oil Control High-Use Site: Yes / No Treatment BMP: _________________________________ Maintenance Agreement: Yes / No with whom? _____________________________________ Other Drainage Structures Describe: TDA #2 TDA #2 contains 0.827 acres and is the on-site development portion of the project, all Core Requirements and Special Requirements Apply 1 March 2025 Flow Control by means of infiltration N/A TBD TBD TBD Will Provide upon Civil Development application Permeable Pavement N/A Residential N/A N/A Roof Area gravel infiltration bed Part 12 TIR SUMMARY SHEET (provide one TIR Summary Sheet per Threshold Discharge Area) Threshold Discharge Area: (name or description) Core Requirements (all 9 apply): Discharge at Natural Location Number of Natural Discharge Locations: Offsite Analysis Level: 1 / 2 / 3 dated:__________________ Flow Control (include facility summary sheet) Standard: _______________________________ or Exemption Number: ____________ Conveyance System Spill containment located at: _____________________________ Erosion and Sediment Control / Construction Stormwater Pollution Prevention CSWPP/CESCL/ESC Site Supervisor: _____________________ Contact Phone: _________________________ After Hours Phone: _________________________ Maintenance and Operation Responsibility (circle one): Private / Public If Private, Maintenance Log Required: Yes / No Financial Guarantees and Liability Provided: Yes / No Part 12 TIR SUMMARY SHEET (provide one TIR Summary Sheet per Threshold Discharge Area) Water Quality (include facility summary sheet) Type (circle one): Basic / Sens. Lake / Enhanced Basic / Bog or Exemption No. _______________________ On-site BMPs Describe: Special Requirements (as applicable): Area Specific Drainage Requirements Type: SDO / MDP / BP / Shared Fac. / None Name: ________________________ Floodplain/Floodway Delineation Type (circle one): Major / Minor / Exemption / None 100-year Base Flood Elevation (or range): _______________ Datum: Flood Protection Facilities Describe: Source Control (commercial / industrial land use) Describe land use: Describe any structural controls: Oil Control High-Use Site: Yes / No Treatment BMP: _________________________________ Maintenance Agreement: Yes / No with whom? _____________________________________ Other Drainage Structures Describe: TDA #3 TDA #3 is the frontage portion of the development consisting of 0.0562 Acres. This TDA projects to provide only 1,176 SF of new impervious surfaces. 1 March 2025 Exempt per RSWDM Section 1.2.3(1 & 2) Exempt per RSWDM Section 1.2.8(1) N/A TBD TBD TBD Will Provide upon Civil Development application None Required per exemption N/A Public Right of Way N/A N/A REFERENCE 8-A: TECHNICAL INFORMATION REPORT (TIR) WORKSHEET TECHNICAL INFORMATION REPORT (TIR) WORKSHEET 2022 City of Renton Surface Water Design Manual 6/22/2022 Ref 8-A-5 Part 13 EROSION AND SEDIMENT CONTROL REQUIREMENTS MINIMUM ESC REQUIREMENTS DURING CONSTRUCTION  Clearing Limits  Cover Measures  Perimeter Protection  Traffic Area Stabilization  Sediment Retention  Surface Water Collection  Dewatering Control  Dust Control  Flow Control  Control Pollutants  Protect Existing and Proposed BMPs/Facilities  Maintain Protective BMPs / Manage Project MINIMUM ESC REQUIREMENTS AFTER CONSTRUCTION  Stabilize exposed surfaces  Remove and restore Temporary ESC Facilities  Clean and remove all silt and debris, ensure operation of Permanent BMPs/Facilities, restore operation of BMPs/Facilities as necessary  Flag limits of sensitive areas and open space preservation areas  Other _______________________ Part 14 STORMWATER FACILITY DESCRIPTIONS (Note: Include Facility Summary and Sketch) Flow Control Description Water Quality Description On-site BMPs Description  Detention  Infiltration  Regional Facility  Shared Facility  Other _____________ _____________ _____________ _____________ _____________ _____________ _____________ _____________ _____________ _____________ _____________  Vegetated Flowpath  Wetpool  Filtration  Oil Control  Spill Control  Other _____________ _____________ _____________ _____________ _____________ _____________ _____________ _____________ _____________ _____________ _____________  Full Dispersion  Full Infiltration  Limited Infiltration  Rain Gardens  Bioretention  Permeable Pavement  Basic Dispersion  Soil Amendment  Perforated Pipe Connection  Other _____________ _____________ _____________ _____________ _____________ _____________ _____________ _____________ _____________ _____________ _____________ X X X X X X X X X X X Permeable Pavement Permeable Pavement Roof Area Infiltration Facility X Driveways and PVT Road Roof Area Infiltration Facility X X Roof Area Infiltration Facility REFERENCE 8: PLAN REVIEW FORMS AND WORKSHEET TECHNICAL INFORMATION REPORT (TIR) WORKSHEET 6/22/2022 2022 City of Renton Surface Water Design Manual 8-A-6 Part 15 EASEMENTS/TRACTS Part 16 STRUCTURAL ANALYSIS  Drainage Easement  Covenant  Native Growth Protection Covenant  Tract  Other ____________________________  Cast in Place Vault  Retaining Wall  Rockery > 4′ High  Structural on Steep Slope  Other _______________________________ Part 17 SIGNATURE OF PROFESSIONAL ENGINEER I, or a civil engineer under my supervision, have visited the site. Actual site conditions as observed were incorporated into this worksheet and the attached Technical Information Report. To the best of my knowledge the information provided here is accurate. ____________________________________________________________________________________ Signed/Date X : PVT Road Tract SECTION 1.1 DRAINAGE REVIEW 6/22/2022 2022 City of Renton Surface Water Design Manual 1-14 FIGURE 1.1.2.A FLOW CHART FOR DETERMINING TYPE OF DRAINAGE REVIEW REQUIRED Figure A10 1.1.2 DRAINAGE REVIEW TYPES AND REQUIREMENTS 2022 City of Renton Surface Water Design Manual 6/22/2022 1-15 TABLE 1.1.2.A REQUIREMENTS APPLIED UNDER EACH DRAINAGE REVIEW TYPE Simplified Single family residential projects that result in 2,000 sf of new plus replaced impervious surface or 7,000 sf of land disturbing activity but do not exceed the new plus replaced PGIS, new PGPS, and new pervious surface thresholds specified in Sec. 1.1.2.1. Note: The project may also be subject to Targeted Drainage Review. Directed Single family residential projects that result in 2,000 sf of new plus replaced impervious surface or 7,000 sf of land disturbing activity that are not subject to Simplified Drainage Review or Large Project Drainage Review. The project may also be subject to Targeted Drainage Review. Targeted New and redevelopment projects that are not subject to Directed, Full or Large Project Drainage Review, AND have characteristics of one or more of the following categories of projects: 1. Projects containing or adjacent to a flood, erosion, or steep slope hazard area; or projects within a Landslide Hazard Drainage Area or Aquifer Protection Area. 2. Projects that construct or modify a drainage pipe/ditch that is 12″ or larger or receive runoff from a 12″ or larger drainage pipe/ditch. 3. Redevelopment projects with $100,000 in improvements to a high-use site.(1) Full All projects that result in 2,000 sf of new plus replaced impervious surface or 7,000 sf of land disturbing activity but are not subject to Simplified Drainage Review, Directed Drainage Review, OR Large Project Drainage Review. Large Project Projects that result in 50 acres of new impervious surface within a subbasin or multiple subbasins that are hydraulically connected. DRAINAGE REVIEW TYPE Simplified Directed Targeted Full Large Project Categ 1 Categ 2 Categ 3 SIMPLIFIED DRAINAGE REQUIREMENTS SEE NOTE 4 CORE REQUIREMENT #1 Discharge at Natural Location (4)  (2,3) *(2)    CORE REQUIREMENT #2 Offsite Analysis (4)  (2,3) *(2) (3) (3) (3) CORE REQUIREMENT #3 Flow Control Facilities (4)  (2,3) *(2) (3) (3) CORE REQUIREMENT #4 Conveyance System (4)  (2,3) *(2)    CORE REQUIREMENT #5 Construction Stormwater Pollution Prevention (4)  (2,3)      CORE REQUIREMENT #6 Maintenance & Operations (4)  (2,3) *(2)     CORE REQUIREMENT #7 Financial Guarantees & Liability (4)  (2,3) *(2) (3) (3) (3) (3) CORE REQUIREMENT #8 Water Quality Facilities (4)  (2,3) *(2) (3) (3) CORE REQUIREMENT #9 On-site BMPs (4)    SECTION 1.1 DRAINAGE REVIEW 6/22/2022 2022 City of Renton Surface Water Design Manual 1-16 TABLE 1.1.2.A REQUIREMENTS APPLIED UNDER EACH DRAINAGE REVIEW TYPE DRAINAGE REVIEW TYPE Simplified Directed Targeted Full Large Project Categ 1 Categ 2 Categ 3 SPECIAL REQUIREMENT #1 Other Adopted Area-Specific Requirements (4)  (2,3) (3) (3) (3) SPECIAL REQUIREMENT #2 Flood Hazard Area Delineation (4)  (2,3) (3) (3) (3) SPECIAL REQUIREMENT #3 Flood Protection Facilities (4)  (2,3) (3) (3) (3) SPECIAL REQUIREMENT #4 Source Control (4)  (2,3) (3) (3) (3) (3) (3) SPECIAL REQUIREMENT #5 Oil Control (4)  (2,3) (3) (3) (3) SPECIAL REQUIREMENT #6 Aquifer Protection Areas  (2,3) (3) (3) (3) (3) (3) (1) Category 3 projects installing oil controls that construct or modify a 12-inch pipe/ditch are also Category 2 projects. (2) May be applied by CED based on project or site-specific conditions. Documentation of compliance required. (3) These requirements have exemptions or thresholds that may preclude or limit their application to a specific project. (4) A proposed project subject to Simplified Drainage Review that complies with the Simplified drainage requirements detailed in Appendix C is presumed to comply with all the core and special requirements in Sections 1.2 and 1.3 except those requirements that would apply to the project if it is subject to Targeted Drainage Review as specified in Section 1.1.2.2. APPENDIX B: SOIL ASSESSMENTS Cobalt Geosciences, LLC P.O. Box 1792 North Bend, WA 98045 www.cobaltgeo.com (206) 331-1097 April 10, 2025 Rupinder Dulay rupinder@dulayhomes.com RE: Geotechnical Evaluation Proposed Development 18855 and 18845 102nd Avenue SE Renton, Washington In accordance with your authorization, Cobalt Geosciences, LLC has prepared this report to discuss the results of our geotechnical evaluation at the referenced site. The purpose of our evaluation was to provide recommendations for foundation design, grading, and earthwork. Site & Project Description The site is located at 18845 and 18855 102nd Avenue SE in Renton, Washington. The site consists of two parcels (No. 3223059285 and 3223059028) with a total area of 51,271 square feet. The northeast portion of the property is developed with a residence and driveway. The remainder of the property is vegetated with grasses, bushes, blackberry vines, ivy, ferns, other understory, and variable diameter trees. Overall, the site slopes downward to the west at low magnitudes and relief of about 15 feet. There are steeper slopes on the parcel to the west. These slope areas have magnitudes of 15 to 35 percent and relief of up to 40 feet. The site is bordered to north, south, and west by residential properties and to the east by 102nd Avenue SE. The proposed development includes one or more new residential structures. The locations will depend on final platting and land use regulations. Stormwater will include infiltration or other systems depending on feasibility. Site grading may include cuts and fills of 3 feet or less and foundation loads are expected to be light. We should be provided with the final plans to verify that our recommendations remain valid and do not require updating. Area Geology The Geologic Map of the Renton Quadrangle, indicates that the site is underlain by Vashon Glacial Till. Vashon Glacial Till includes mixtures of silt, sand, gravel, and clay in a nonsorted matrix or diamict. These deposits become denser with depth. Figure B1 April 10, 2025 Page 2 of 10 Geotechnical Evaluation www.cobaltgeo.com (206) 331-1097 Soil & Groundwater Conditions As part of our evaluation, we excavated three test pits, where accessible. The explorations encountered approximately 6 inches of grass and topsoil underlain by approximately 1.5 to 2 feet of loose to medium dense, silty-fine to medium grained sand trace gravel (Weathered Glacial Till). These materials were underlain by dense to very dense, silty-fine to medium grained sand trace gravel (Vashon Glacial Till), which continued to the termination depths of the explorations. Groundwater was observed at very shallow depths in TP-1 and TP-2. No groundwater was present in TP-3. Groundwater appears to become perched during the wet season on the denser glacial till, which is relatively shallow in this area. Water table elevations often fluctuate over time. The groundwater level will depend on a variety of factors that may include seasonal precipitation, irrigation, land use, climatic conditions and soil permeability. Water levels at the time of the field investigation may be different from those encountered during the construction phase of the project. Erosion Hazard The Natural Resources Conservation Services (NRCS) maps for King County indicate that the site is underlain by Alderwood gravelly sandy loam (8 to 15 percent slopes). Based on our experience, the site soils would have a slight to moderate erosion potential in a disturbed state depending on the slope magnitude. It is our opinion that soil erosion potential at this project site can be reduced through landscaping and surface water runoff control. Typically, erosion of exposed soils will be most noticeable during periods of rainfall and may be controlled by the use of normal temporary erosion control measures, such as silt fences, hay bales, mulching, control ditches and diversion trenches. The typical wet weather season, with regard to site grading, is from October 31st to April 1st. Erosion control measures should be in place before the onset of wet weather. Seismic Hazard The overall subsurface profile corresponds to a Site Class D as defined by Table 1613.5.2 of the International Building Code (IBC). A Site Class D applies to an overall profile consisting of medium dense to very dense soils within the upper 100 feet. We referenced the U.S. Geological Survey (USGS) Earthquake Hazards Program Website to obtain values for SS, S1, Fa, and Fv. The USGS website includes the most updated published data on seismic conditions. The following tables provide seismic parameters from the USGS web site with referenced parameters from ASCE 7-16. April 10, 2025 Page 3 of 10 Geotechnical Evaluation www.cobaltgeo.com (206) 331-1097 Seismic Design Parameters (ASCE 7-16) Site Class Spectral Acceleration at 0.2 sec. (g) Spectral Acceleration at 1.0 sec. (g) Site Coefficients Design Spectral Response Parameters Design PGA Fa Fv SDS SD1 D 1.385 0.472 1.0 Null 0.924 Null 0.589 Additional seismic considerations include liquefaction potential and amplification of ground motions by soft/loose soil deposits. The liquefaction potential is highest for loose sand with a high groundwater table. The site has a low likelihood of liquefaction. For items listed as “Null” see Section 11.4.8 of the ASCE. Conclusions and Recommendations General The site is underlain by glacial till which becomes denser with depth. There may be areas of fill associated with prior grading. The proposed residential structures may be supported on shallow foundation systems bearing on medium dense or firmer native soils or on structural fill placed on the native soils. Local overexcavation of loose weathered native soils may be necessary depending on the proposed elevations and locations of the new footings. The site is near locally steeper slopes (west of the site). While not a landslide hazard area, we recommend a minimum building setback of 20 feet from slopes with magnitudes of 35 percent or more and relief of at least 15 feet. We note that this setback is likely located either off site to the west or near the west property line. Typical building setbacks will likely result in locations in excess of this value. Infiltration is not feasible due to the presence of shallow groundwater and a restrictive layer. Dispersion devices, detention, and local permeable pavements in areas with minimal cuts and/or fills are generally suitable. We can provide additional input once a site plan is prepared. Site Preparation Trees, shrubs and other vegetation should be removed prior to stripping of surficial organic-rich soil and fill. Based on observations from the site investigation program, it is anticipated that the stripping depth will be 6 to 12 inches. Deeper excavations will be necessary in areas of existing foundation systems (where present), larger trees where roots persist, and in any areas underlain by undocumented fill. The native soils consist of silty-sand with gravel. Most of the native soils may be used as structural fill provided they achieve compaction requirements and are within 3 percent of the optimum moisture. Some of these soils may only be suitable for use as fill during the summer months, as they will be above the optimum moisture levels in their current state. These soils are HIGHLY moisture sensitive and may degrade during periods of wet weather and under equipment traffic. April 10, 2025 Page 4 of 10 Geotechnical Evaluation www.cobaltgeo.com (206) 331-1097 Imported structural fill should consist of a sand and gravel mixture with a maximum grain size of 3 inches and less than 5 percent fines (material passing the U.S. Standard No. 200 Sieve). Structural fill should be placed in maximum lift thicknesses of 12 inches and should be compacted to a minimum of 95 percent of the modified proctor maximum dry density, as determined by the ASTM D 1557 test method. Temporary Excavations Based on our understanding of the project, we anticipate that the grading could include local cuts on the order of approximately 3 feet or less for foundation and most of the utility placement. Temporary excavations should be sloped no steeper than 1.5H:1V (Horizontal:Vertical) in loose native soils and fill, 1H:1V in medium dense native soils and 3/4H:1V in dense to very dense native soils. If an excavation is subject to heavy vibration or surcharge loads, we recommend that the excavations be sloped no steeper than 2H:1V, where room permits. Temporary cuts should be in accordance with the Washington Administrative Code (WAC) Part N, Excavation, Trenching, and Shoring. Temporary slopes should be visually inspected daily by a qualified person during construction activities and the inspections should be documented in daily reports. The contractor is responsible for maintaining the stability of the temporary cut slopes and reducing slope erosion during construction. Temporary cut slopes should be covered with visqueen to help reduce erosion during wet weather, and the slopes should be closely monitored until the permanent retaining systems or slope configurations are complete. Materials should not be stored or equipment operated within 10 feet of the top of any temporary cut slope. Soil conditions may not be completely known from the geotechnical investigation. In the case of temporary cuts, the existing soil conditions may not be completely revealed until the excavation work exposes the soil. Typically, as excavation work progresses the maximum inclination of temporary slopes will need to be re-evaluated by the geotechnical engineer so that supplemental recommendations can be made. Soil and groundwater conditions can be highly variable. Scheduling for soil work will need to be adjustable, to deal with unanticipated conditions, so that the project can proceed and required deadlines can be met. If any variations or undesirable conditions are encountered during construction, we should be notified so that supplemental recommendations can be made. If room constraints or groundwater conditions do not permit temporary slopes to be cut to the maximum angles allowed by the WAC, temporary shoring systems may be required. The contractor should be responsible for developing temporary shoring systems, if needed. We recommend that Cobalt Geosciences and the project structural engineer review temporary shoring designs prior to installation, to verify the suitability of the proposed systems. Foundation Design The proposed structures may be supported on shallow spread footing foundation systems bearing on undisturbed medium dense or firmer native soils or on properly compacted structural fill placed on the suitable native soils. Any undocumented fill and/or loose native soils should be removed and replaced with structural fill below foundation elements. Structural fill below footings should consist of clean angular rock 5/8 to 4 inches in size. We should verify soil conditions during foundation excavation work. April 10, 2025 Page 5 of 10 Geotechnical Evaluation www.cobaltgeo.com (206) 331-1097 For shallow foundation support, we recommend widths of at least 16 and 24 inches, respectively, for continuous wall and isolated column footings supporting the proposed structure. Provided that the footings are supported as recommended above, a net allowable bearing pressure of 2,500 pounds per square foot (psf) may be used for design. Detention vaults set at least 5 feet below grade may be designed with a bearing pressure of 5,000 psf. A 1/3 increase in the above value may be used for short duration loads, such as those imposed by wind and seismic events. Structural fill placed on bearing, native subgrade should be compacted to at least 95 percent of the maximum dry density based on ASTM Test Method D1557. Footing excavations should be inspected to verify that the foundations will bear on suitable material. Exterior footings should have a minimum depth of 18 inches below pad subgrade (soil grade) or adjacent exterior grade, whichever is lower. Interior footings should have a minimum depth of 12 inches below pad subgrade (soil grade) or adjacent exterior grade, whichever is lower. If constructed as recommended, the total foundation settlement is not expected to exceed 1 inch. Differential settlement, along a 25-foot exterior wall footing, or between adjoining column footings, should be less than ½ inch. This translates to an angular distortion of 0.002. Most settlement is expected to occur during construction, as the loads are applied. However, additional post- construction settlement may occur if the foundation soils are flooded or saturated. All footing excavations should be observed by a qualified geotechnical consultant. Resistance to lateral footing displacement can be determined using an allowable friction factor of 0.40 acting between the base of foundations and the supporting subgrades. Lateral resistance for footings can also be developed using an allowable equivalent fluid passive pressure of 250 pounds per cubic foot (pcf) acting against the appropriate vertical footing faces (neglect the upper 12 inches below grade in exterior areas). The frictional and passive resistance of the soil may be combined without reduction in determining the total lateral resistance. Care should be taken to prevent wetting or drying of the bearing materials during construction. Any extremely wet or dry materials, or any loose or disturbed materials at the bottom of the footing excavations, should be removed prior to placing concrete. The potential for wetting or drying of the bearing materials can be reduced by pouring concrete as soon as possible after completing the footing excavation and evaluating the bearing surface by the geotechnical engineer or his representative. Concrete Retaining Walls The following table, titled Wall Design Criteria, presents the recommended soil related design parameters for retaining walls with a level backslope. Contact Cobalt if an alternate retaining wall system is used. This has been included for new cast in place walls. Wall Design Criteria “At-rest” Conditions (Lateral Earth Pressure – EFD+) 55 pcf (Equivalent Fluid Density) “Active” Conditions (Lateral Earth Pressure – EFD+) 35 pcf (Equivalent Fluid Density) Seismic Increase for “At-rest” Conditions (Lateral Earth Pressure) 14H* (Uniform Distribution) April 10, 2025 Page 6 of 10 Geotechnical Evaluation www.cobaltgeo.com (206) 331-1097 Seismic Increase for “Active” Conditions (Lateral Earth Pressure) 7H* (Uniform Distribution) Passive Earth Pressure on Low Side of Wall (Allowable, includes F.S. = 1.5) Neglect upper 12 inches, then 250 pcf EFD+ Soil-Footing Coefficient of Sliding Friction (Allowable; includes F.S. = 1.5) 0.40 *H is the height of the wall; Increase based on one in 500 year seismic event (10 percent probability of being exceeded in 50 years), +EFD – Equivalent Fluid Density The stated lateral earth pressures do not include the effects of hydrostatic pressure generated by water accumulation behind the retaining walls. Uniform horizontal lateral active and at-rest pressures on the retaining walls from vertical surcharges behind the wall may be calculated using active and at-rest lateral earth pressure coefficients of 0.3 and 0.5, respectively. A soil unit weight of 125 pcf may be used to calculate vertical earth surcharges. To reduce the potential for the buildup of water pressure against the walls, continuous footing drains (with cleanouts) should be provided at the bases of the walls. The footing drains should consist of a minimum 4-inch diameter perforated pipe, sloped to drain, with perforations placed down and enveloped by a minimum 6 inches of pea gravel in all directions. The backfill adjacent to and extending a lateral distance behind the walls at least 2 feet should consist of free-draining granular material. All free draining backfill should contain less than 3 percent fines (passing the U.S. Standard No. 200 Sieve) based upon the fraction passing the U.S. Standard No. 4 Sieve with at least 30 percent of the material being retained on the U.S. Standard No. 4 Sieve. The primary purpose of the free-draining material is the reduction of hydrostatic pressure. Some potential for the moisture to contact the back face of the wall may exist, even with treatment, which may require that more extensive waterproofing be specified for walls, which require interior moisture sensitive finishes. We recommend that the backfill be compacted to at least 90 percent of the maximum dry density based on ASTM Test Method D1557. In place density tests should be performed to verify adequate compaction. Soil compactors place transient surcharges on the backfill. Consequently, only light hand operated equipment is recommended within 3 feet of walls so that excessive stress is not imposed on the walls. Stormwater Management Feasibility Infiltration is not feasible due to the presence of shallow groundwater and a restrictive layer. Dispersion devices, detention, and local permeable pavements in areas with minimal cuts and/or fills are generally suitable. Deeper infiltration trenches and drywells are not feasible. The design infiltration rate was determined by applying correction factors to the measured infiltration rates as prescribed in Volume III, Section 3.3.6 of the DOE. The measured rate must be reduced through appropriate correction factors for site variability (CFV), uncertainty of test method (CFT), and degree of influent control (CFM) to prevent siltation and bio-buildup. April 10, 2025 Page 7 of 10 Geotechnical Evaluation www.cobaltgeo.com (206) 331-1097 It should be noted that construction traffic or other disturbance to the target infiltration area could compact the soil, which may decrease the effective infiltration rates. The correction factors and resulting design infiltration rate are also shown in the table below. Test Number Test Depth (ft) Measured Infiltration Rate (in/hr) Correction Factors Design Infiltration Rate (in/hr) CFV CFT CFM TP-3 1.0 0.8 0.9 0.5 0.9 0.324 This rate is for permeable pavements and rain gardens only. Soils had Cation Exchange Capacity of 8.2 meq and organic content of 3.5 percent by weight. Slab-on-Grade We recommend that the upper 12 inches of the native soils within slab areas be re-compacted to at least 95 percent of the modified proctor (ASTM D1557 Test Method). Often, a vapor barrier is considered below concrete slab areas. However, the usage of a vapor barrier could result in curling of the concrete slab at joints. Floor covers sensitive to moisture typically requires the usage of a vapor barrier. A materials or structural engineer should be consulted regarding the detailing of the vapor barrier below concrete slabs. Exterior slabs typically do not utilize vapor barriers. The American Concrete Institutes ACI 360R-06 Design of Slabs on Grade and ACI 302.1R-04 Guide for Concrete Floor and Slab Construction are recommended references for vapor barrier selection and floor slab detailing. Slabs on grade may be designed using a coefficient of subgrade reaction of 210 pounds per cubic inch (pci) assuming the slab-on-grade base course is underlain by structural fill placed and compacted as outlined above. A 4- to 6-inch-thick capillary break layer should be placed over the prepared subgrade. This material should consist of pea gravel or 5/8 inch clean angular rock. A perimeter drainage system is recommended unless interior slab areas are elevated a minimum of 12 inches above adjacent exterior grades. If installed, a perimeter drainage system should consist of a 4-inch diameter perforated drain pipe surrounded by a minimum 6 inches of drain rock wrapped in a non-woven geosynthetic filter fabric to reduce migration of soil particles into the drainage system. The perimeter drainage system should discharge by gravity flow to a suitable stormwater system. Exterior grades surrounding buildings should be sloped at a minimum of one percent to facilitate surface water flow away from the building and preferably with a relatively impermeable surface cover immediately adjacent to the building. April 10, 2025 Page 8 of 10 Geotechnical Evaluation www.cobaltgeo.com (206) 331-1097 Erosion and Sediment Control Erosion and sediment control (ESC) is used to reduce the transportation of eroded sediment to wetlands, streams, lakes, drainage systems, and adjacent properties. Erosion and sediment control measures should be implemented, and these measures should be in general accordance with local regulations. At a minimum, the following basic recommendations should be incorporated into the design of the erosion and sediment control features for the site: Schedule the soil, foundation, utility, and other work requiring excavation or the disturbance of the site soils, to take place during the dry season (generally May through September). However, provided precautions are taken using Best Management Practices (BMP’s), grading activities can be completed during the wet season (generally October through April). All site work should be completed and stabilized as quickly as possible. Additional perimeter erosion and sediment control features may be required to reduce the possibility of sediment entering the surface water. This may include additional silt fences, silt fences with a higher Apparent Opening Size (AOS), construction of a berm, or other filtration systems. Any runoff generated by dewatering discharge should be treated through construction of a sediment trap if there is sufficient space. If space is limited other filtration methods will need to be incorporated. Utilities Utility trenches should be excavated according to accepted engineering practices following OSHA (Occupational Safety and Health Administration) standards, by a contractor experienced in such work. The contractor is responsible for the safety of open trenches. Traffic and vibration adjacent to trench walls should be reduced; cyclic wetting and drying of excavation side slopes should be avoided. Depending upon the location and depth of some utility trenches, groundwater flow into open excavations could be experienced, especially during or shortly following periods of precipitation. In general, silty soils were encountered at shallow depths in the explorations at this site. These soils have low cohesion and density and will have a tendency to cave or slough in excavations. Shoring or sloping back trench sidewalls is required within these soils in excavations greater than 4 feet deep. All utility trench backfill should consist of imported structural fill or suitable on site soils. Utility trench backfill placed in or adjacent to buildings and exterior slabs should be compacted to at least 95 percent of the maximum dry density based on ASTM Test Method D1557. The upper 5 feet of utility trench backfill placed in pavement areas should be compacted to at least 95 percent of the maximum dry density based on ASTM Test Method D1557. Below 5 feet, utility trench backfill in pavement areas should be compacted to at least 90 percent of the maximum dry density based on ASTM Test Method D1557. Pipe bedding should be in accordance with the pipe manufacturer's recommendations. The contractor is responsible for removing all water-sensitive soils from the trenches regardless of the backfill location and compaction requirements. Depending on the depth and location of the proposed utilities, we anticipate the need to re-compact existing fill soils below the utility structures and pipes. The contractor should use appropriate equipment and methods to avoid damage to the utilities and/or structures during fill placement and compaction procedures. April 10, 2025 Page 9 of 10 Geotechnical Evaluation www.cobaltgeo.com (206) 331-1097 CONSTRUCTION FIELD REVIEWS Cobalt Geosciences should be retained to provide part time field review during construction in order to verify that the soil conditions encountered are consistent with our design assumptions and that the intent of our recommendations is being met. This will require field and engineering review to: Monitor and test structural fill placement and soil compaction Observe bearing capacity at foundation locations Observe slab-on-grade preparation Observe soil conditions at stormwater system locations Monitor foundation drainage placement Observe excavation stability Geotechnical design services should also be anticipated during the subsequent final design phase to support the structural design and address specific issues arising during this phase. Field and engineering review services will also be required during the construction phase in order to provide a Final Letter for the project. CLOSURE This report was prepared for the exclusive use of Rupinder Dulay and his appointed consultants. Any use of this report or the material contained herein by third parties, or for other than the intended purpose, should first be approved in writing by Cobalt Geosciences, LLC. The recommendations contained in this report are based on assumed continuity of soils with those of our test holes and assumed structural loads. Cobalt Geosciences should be provided with final architectural and civil drawings when they become available in order that we may review our design recommendations and advise of any revisions, if necessary. Use of this report is subject to the Statement of General Conditions provided in Appendix A. It is the responsibility of Rupinder Dulay who is identified as “the Client” within the Statement of General Conditions, and its agents to review the conditions and to notify Cobalt Geosciences should any of these not be satisfied. Sincerely, Cobalt Geosciences, LLC 4/10/2025 Phil Haberman, PE, LG, LEG Principal April 10, 2025 Page 10 of 10 Geotechnical Evaluation www.cobaltgeo.com (206) 331-1097 Statement of General Conditions USE OF THIS REPORT: This report has been prepared for the sole benefit of the Client or its agent and may not be used by any third party without the express written consent of Cobalt Geosciences and the Client. Any use which a third party makes of this report is the responsibility of such third party. BASIS OF THE REPORT: The information, opinions, and/or recommendations made in this report are in accordance with Cobalt Geosciences present understanding of the site specific project as described by the Client. The applicability of these is restricted to the site conditions encountered at the time of the investigation or study. If the proposed site specific project differs or is modified from what is described in this report or if the site conditions are altered, this report is no longer valid unless Cobalt Geosciences is requested by the Client to review and revise the report to reflect the differing or modified project specifics and/or the altered site conditions. STANDARD OF CARE: Preparation of this report, and all associated work, was carried out in accordance with the normally accepted standard of care in the state of execution for the specific professional service provided to the Client. No other warranty is made. INTERPRETATION OF SITE CONDITIONS: Soil, rock, or other material descriptions, and statements regarding their condition, made in this report are based on site conditions encountered by Cobalt Geosciences at the time of the work and at the specific testing and/or sampling locations. Classifications and statements of condition have been made in accordance with normally accepted practices which are judgmental in nature; no specific description should be considered exact, but rather reflective of the anticipated material behavior. Extrapolation of in situ conditions can only be made to some limited extent beyond the sampling or test points. The extent depends on variability of the soil, rock and groundwater conditions as influenced by geological processes, construction activity, and site use. VARYING OR UNEXPECTED CONDITIONS: Should any site or subsurface conditions be encountered that are different from those described in this report or encountered at the test locations, Cobalt Geosciences must be notified immediately to assess if the varying or unexpected conditions are substantial and if reassessments of the report conclusions or recommendations are required. Cobalt Geosciences will not be responsible to any party for damages incurred as a result of failing to notify Cobalt Geosciences that differing site or sub-surface conditions are present upon becoming aware of such conditions. PLANNING, DESIGN, OR CONSTRUCTION: Development or design plans and specifications should be reviewed by Cobalt Geosciences, sufficiently ahead of initiating the next project stage (property acquisition, tender, construction, etc), to confirm that this report completely addresses the elaborated project specifics and that the contents of this report have been properly interpreted. Specialty quality assurance services (field observations and testing) during construction are a necessary part of the evaluation of sub-subsurface conditions and site preparation works. Site work relating to the recommendations included in this report should only be carried out in the presence of a qualified geotechnical engineer; Cobalt Geosciences cannot be responsible for site work carried out without being present. N Proposed Development 18845 & 18855 102nd Avenue SE Renton, Washington Site Image Figure 1 Cobalt Geosciences, LLCP.O. Box 82243 Kenmore, WA 98028 (206) 331-1097 www.cobaltgeo.com cobaltgeo@gmail.com Subject Property TP-1 TP-1 TP-3 TP-2 Attachment Cobalt Geosciences, LLCPO Box 1792North Bend, WA 98045 (206) 331-1097 www.cobaltgeo.com phil@cobaltgeo.com PT Well-graded gravels, gravels, gravel-sand mixtures, little or no fines Poorly graded gravels, gravel-sand mixtures, little or no fines Silty gravels, gravel-sand-silt mixtures Clayey gravels, gravel-sand-clay mixtures Well-graded sands, gravelly sands, little or no fines COARSE GRAINED SOILS (more than 50% retained on No. 200 sieve) Primarily organic matter, dark in color, and organic odor Peat, humus, swamp soils with high organic content (ASTM D4427)HIGHLY ORGANIC SOILS FINE GRAINED SOILS (50% or more passes the No. 200 sieve) MAJOR DIVISIONS SYMBOL TYPICAL DESCRIPTION Gravels (more than 50% of coarse fraction retained on No. 4 sieve) Sands (50% or more of coarse fraction passes the No. 4 sieve) Silts and Clays(liquid limit lessthan 50) Silts and Clays (liquid limit 50 or more) Organic Inorganic Organic Inorganic Sands with Fines(more than 12%fines) Clean Sands (less than 5%fines) Gravels with Fines (more than 12% fines) Clean Gravels (less than 5% fines) Unified Soil Classification System (USCS) Poorly graded sand, gravelly sands, little or no fines Silty sands, sand-silt mixtures Clayey sands, sand-clay mixtures Inorganic silts of low to medium plasticity, sandy silts, gravelly silts, or clayey silts with slight plasticity Inorganic clays of low to medium plasticity, gravelly clays, sandy clays, silty clays, lean clays Organic silts and organic silty clays of low plasticity Inorganic silts, micaceous or diatomaceous fine sands or silty soils, elastic silt Inorganic clays of medium to high plasticity, sandy fat clay, or gravelly fat clay Organic clays of medium to high plasticity, organic silts Moisture Content Definitions Grain Size Definitions Dry Absence of moisture, dusty, dry to the touch Moist Damp but no visible water Wet Visible free water, from below water table Grain Size Definitions Description Sieve Number and/or Size Fines <#200 (0.08 mm) Sand -Fine -Medium -Coarse Gravel -Fine -Coarse Cobbles Boulders #200 to #40 (0.08 to 0.4 mm) #40 to #10 (0.4 to 2 mm) #10 to #4 (2 to 5 mm) #4 to 3/4 inch (5 to 19 mm) 3/4 to 3 inches (19 to 76 mm) 3 to 12 inches (75 to 305 mm) >12 inches (305 mm) Classification of Soil Constituents MAJOR constituents compose more than 50 percent, by weight, of the soil. Major constituents are capitalized (i.e., SAND). Minor constituents compose 12 to 50 percent of the soil and precede the major constituents (i.e., silty SAND). Minor constituents preceded by “slightly” compose 5 to 12 percent of the soil (i.e., slightly silty SAND). Trace constituents compose 0 to 5 percent of the soil(i.e., slightly silty SAND, trace gravel). Relative Density Consistency (Coarse Grained Soils) (Fine Grained Soils) N, SPT, Relative Blows/FT Density 0 - 4 Very loose 4 - 10 Loose 10 - 30 Medium dense 30 - 50 Dense Over 50 Very dense N, SPT, Relative Blows/FT Consistency Under 2 Very soft 2 - 4 Soft4 - 8 Medium stiff8 - 15 Stiff15 - 30 Very stiff Over 30 Hard Cobalt Geosciences, LLCP.O. Box 82243Kenmore, WA 98028(206) 331-1097 www.cobaltgeo.com cobaltgeo@gmail.com Soil Classification Chart Figure C1 Exploration Logs Cobalt Geosciences, LLCP.O. Box 82243 Kenmore, WA 98028 (206) 331-1097 www.cobaltgeo.com cobaltgeo@gmail.com Test Pit TP-1 Date: April 9, 2025 Contractor: Austin Depth: 8’ Elevation: Logged By: PH Checked By: SC Groundwater: 1.5’ Material Description Moisture Content (%)PlasticLimit Liquid Limit 10 20 30 400 50 1 2 3 4 5 6 DCP Equivalent N-Value 7 8 9 10 Loose to medium dense, silty-fine to medium grained sand with gravel,yellowish brown to grayish brown, moist. ( Glacial Till)Weathered SM End of 8’Test Pit Topsoil/Vegetation SM Dense, silty-fine to medium grained sand with gravel grayish brown, moist. (Glacial Till) Proposed Development 18845 & 18855 102nd Avenue SE Renton, Washington Exploration Logs Cobalt Geosciences, LLCP.O. Box 82243 Kenmore, WA 98028 (206) 331-1097 www.cobaltgeo.com cobaltgeo@gmail.com Test Pit TP-2 Date: April 9, 2025 Contractor: Austin Depth: 8’ Elevation: Logged By: PH Checked By: SC Groundwater: 1’ Material Description Moisture Content (%)PlasticLimit Liquid Limit 10 20 30 400 50 1 2 3 4 5 6 DCP Equivalent N-Value 7 8 9 10 Loose to medium dense, silty-fine to medium grained sand with gravel,yellowish brown to grayish brown, moist. ( Glacial Till)WeatheredSM End of 8’Test Pit Topsoil/Vegetation SM Dense, silty-fine to medium grained sand with gravel grayish brown, moist. (Glacial Till) Proposed Development 18845 & 18855 102nd Avenue SE Renton, Washington Exploration Logs Cobalt Geosciences, LLCP.O. Box 82243 Kenmore, WA 98028 (206) 331-1097 www.cobaltgeo.com cobaltgeo@gmail.com Test Pit TP-3 Date: April 9, 2025 Contractor: Austin Depth: 8’ Elevation: Logged By: PH Checked By: SC Groundwater: None Material Description Moisture Content (%)PlasticLimit Liquid Limit 10 20 30 400 50 1 2 3 4 5 6 DCP Equivalent N-Value 7 8 9 10 Loose to medium dense, silty-fine to medium grained sand with gravel,yellowish brown to grayish brown, moist. ( Glacial Till)WeatheredSM End of 8’Test Pit Topsoil/Vegetation SM Dense, silty-fine to medium grained sand with gravel grayish brown, moist. (Glacial Till) Proposed Development 18845 & 18855 102nd Avenue SE Renton, Washington Figure 2 This report shall only be referenced for Historical Soils Data. B Soil Map—King County Area, Washington (Dulay Soil Map ) Natural Resources Conservation Service Web Soil Survey National Cooperative Soil Survey 3/14/2025 Page 1 of 3 52 5 3 5 1 0 52 5 3 5 2 0 52 5 3 5 3 0 52 5 3 5 4 0 52 5 3 5 5 0 52 5 3 5 6 0 52 5 3 5 7 0 52 5 3 5 8 0 52 5 3 5 1 0 52 5 3 5 2 0 52 5 3 5 3 0 52 5 3 5 4 0 52 5 3 5 5 0 52 5 3 5 6 0 52 5 3 5 7 0 52 5 3 5 8 0 559820 559830 559840 559850 559860 559870 559880 559890 559900 559910 559920 559930 559940 559950 559960 559820 559830 559840 559850 559860 559870 559880 559890 559900 559910 559920 559930 559940 559950 559960 47° 25' 58'' N 12 2 ° 1 2 ' 2 4 ' ' W 47° 25' 58'' N 12 2 ° 1 2 ' 1 7 ' ' W 47° 25' 56'' N 12 2 ° 1 2 ' 2 4 ' ' W 47° 25' 56'' N 12 2 ° 1 2 ' 1 7 ' ' W N Map projection: Web Mercator Corner coordinates: WGS84 Edge tics: UTM Zone 10N WGS84 0 15 30 60 90 Feet 0 5 10 20 30 Meters Map Scale: 1:391 if printed on B landscape (17" x 11") sheet. Soil Map may not be valid at this scale. Figure B3 MAP LEGEND MAP INFORMATION Area of Interest (AOI) Area of Interest (AOI) Soils Soil Map Unit Polygons Soil Map Unit Lines Soil Map Unit Points Special Point Features Blowout Borrow Pit Clay Spot Closed Depression Gravel Pit Gravelly Spot Landfill Lava Flow Marsh or swamp Mine or Quarry Miscellaneous Water Perennial Water Rock Outcrop Saline Spot Sandy Spot Severely Eroded Spot Sinkhole Slide or Slip Sodic Spot Spoil Area Stony Spot Very Stony Spot Wet Spot Other Special Line Features Water Features Streams and Canals Transportation Rails Interstate Highways US Routes Major Roads Local Roads Background Aerial Photography The soil surveys that comprise your AOI were mapped at 1:24,000. Warning: Soil Map may not be valid at this scale. Enlargement of maps beyond the scale of mapping can cause misunderstanding of the detail of mapping and accuracy of soil line placement. The maps do not show the small areas of contrasting soils that could have been shown at a more detailed scale. Please rely on the bar scale on each map sheet for map measurements. Source of Map: Natural Resources Conservation Service Web Soil Survey URL: Coordinate System: Web Mercator (EPSG:3857) Maps from the Web Soil Survey are based on the Web Mercator projection, which preserves direction and shape but distorts distance and area. A projection that preserves area, such as the Albers equal-area conic projection, should be used if more accurate calculations of distance or area are required. This product is generated from the USDA-NRCS certified data as of the version date(s) listed below. Soil Survey Area: King County Area, Washington Survey Area Data: Version 20, Aug 27, 2024 Soil map units are labeled (as space allows) for map scales 1:50,000 or larger. Date(s) aerial images were photographed: Jul 31, 2022—Aug 8, 2022 The orthophoto or other base map on which the soil lines were compiled and digitized probably differs from the background imagery displayed on these maps. As a result, some minor shifting of map unit boundaries may be evident. Soil Map—King County Area, Washington (Dulay Soil Map ) Natural Resources Conservation Service Web Soil Survey National Cooperative Soil Survey 3/14/2025 Page 2 of 3 Map Unit Legend Map Unit Symbol Map Unit Name Acres in AOI Percent of AOI AgC Alderwood gravelly sandy loam, 8 to 15 percent slopes 1.5 100.0% Totals for Area of Interest 1.5 100.0% Soil Map—King County Area, Washington Dulay Soil Map Natural Resources Conservation Service Web Soil Survey National Cooperative Soil Survey 3/14/2025 Page 3 of 3 King County Area, Washington AgC—Alderwood gravelly sandy loam, 8 to 15 percent slopes Map Unit Setting National map unit symbol: 2t626 Elevation: 50 to 800 feet Mean annual precipitation: 20 to 60 inches Mean annual air temperature: 46 to 52 degrees F Frost-free period: 160 to 240 days Farmland classification: Prime farmland if irrigated Map Unit Composition Alderwood and similar soils:85 percent Minor components:15 percent Estimates are based on observations, descriptions, and transects of the mapunit. Description of Alderwood Setting Landform:Hills, ridges Landform position (two-dimensional):Shoulder Landform position (three-dimensional):Nose slope, talf Down-slope shape:Convex, linear Across-slope shape:Convex Parent material:Glacial drift and/or glacial outwash over dense glaciomarine deposits Typical profile A - 0 to 7 inches: gravelly sandy loam Bw1 - 7 to 21 inches: very gravelly sandy loam Bw2 - 21 to 30 inches: very gravelly sandy loam Bg - 30 to 35 inches: very gravelly sandy loam 2Cd1 - 35 to 43 inches: very gravelly sandy loam 2Cd2 - 43 to 59 inches: very gravelly sandy loam Properties and qualities Slope:8 to 15 percent Depth to restrictive feature:20 to 39 inches to densic material Drainage class:Moderately well drained Capacity of the most limiting layer to transmit water (Ksat):Very low to moderately low (0.00 to 0.06 in/hr) Depth to water table:About 18 to 37 inches Frequency of flooding:None Frequency of ponding:None Available water supply, 0 to 60 inches: Very low (about 2.7 inches) Interpretive groups Land capability classification (irrigated): None specified Land capability classification (nonirrigated): 4s Map Unit Description: Alderwood gravelly sandy loam, 8 to 15 percent slopes---King County Area, Washington Dulay Soil AgC Natural Resources Conservation Service Web Soil Survey National Cooperative Soil Survey 3/14/2025 Page 1 of 2 Hydrologic Soil Group: B Ecological site: F002XA004WA - Puget Lowlands Forest Forage suitability group: Limited Depth Soils (G002XN302WA), Limited Depth Soils (G002XS301WA), Limited Depth Soils (G002XF303WA) Other vegetative classification: Limited Depth Soils (G002XN302WA), Limited Depth Soils (G002XS301WA), Limited Depth Soils (G002XF303WA) Hydric soil rating: No Minor Components Indianola Percent of map unit:5 percent Landform:Terraces, kames, eskers Landform position (three-dimensional):Tread Down-slope shape:Linear Across-slope shape:Linear Hydric soil rating: No Everett Percent of map unit:5 percent Landform:Kames, moraines, eskers Landform position (two-dimensional):Shoulder, footslope Landform position (three-dimensional):Base slope, crest Down-slope shape:Convex Across-slope shape:Convex Hydric soil rating: No Shalcar Percent of map unit:3 percent Landform:Depressions Landform position (three-dimensional):Dip Down-slope shape:Concave Across-slope shape:Concave Hydric soil rating: Yes Norma Percent of map unit:2 percent Landform:Drainageways, depressions Landform position (three-dimensional):Dip Down-slope shape:Linear, concave Across-slope shape:Concave Hydric soil rating: Yes Data Source Information Soil Survey Area: King County Area, Washington Survey Area Data: Version 20, Aug 27, 2024 Map Unit Description: Alderwood gravelly sandy loam, 8 to 15 percent slopes---King County Area, Washington Dulay Soil AgC Natural Resources Conservation Service Web Soil Survey National Cooperative Soil Survey 3/14/2025 Page 2 of 2 APPENDIX C: DOWNSTREAM ANALYSIS SUPPORTING DOCUMENTS 4,514752 Downstream Conveyance 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. WGS_1984_Web_Mercator_Auxiliary_Sphere Notes None Legend 512 0 256 512 Feet City and County Labels Parcels City and County Boundary Renton <all other values> Network Structures Public Access Riser Private Access Riser Public Inlet Private Inlet Public Manhole Private Manhole Public Utility Vault Private Utility Vault Public Clean Out Private Clean Out Public Unknown Private Unknown Pump Station Public Pump Station Private Pump Station Discharge Point Public Discharge Point Private Discharge Point Water Quality Public Water Quality Private Water Quality Detention Facilities Public Detention Facility Private Detention Facility Pipe Public Pipe Private Pipe Public Culvert Private Culvert Public Roofdrain Private Roofdrain Open Drains Facility Outline Vegetated Non-Vegetated Fence Facility Transfer Inactive Structure Inactive Pipe Inactive Water Quality Inactive Detention Facilities Inactive Discharge Point Streets 2023.sid Red: Band_1 Green: Band_2 Blue: Band_3 1,6 6 5 ' - 0 " Renton Distance Measured 1,665 LF Figure C1 4,514752 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. WGS_1984_Web_Mercator_Auxiliary_Sphere Notes Legend 512 256 Feet5120 City and County Labels Parcels City and County Boundary Renton <all other values> Network Structures Public Access Riser Private Access Riser Public Inlet Private Inlet Public Manhole Private Manhole Public Utility Vault Private Utility Vault Public Clean Out Private Clean Out Public Unknown Private Unknown Pump Station Public Pump Station Private Pump Station Discharge Point Public Discharge Point Private Discharge Point Water Quality Public Water Quality Private Water Quality Detention Facilities Public Detention Facility Private Detention Facility Pipe Public Pipe Private Pipe Public Culvert Private Culvert Public Roofdrain Private Roofdrain Open Drains Facility Outline Vegetated Non-Vegetated Fence Facility Transfer Inactive Structure Inactive Pipe Inactive Water Quality Conveyance flow pathway Downstream ConveyanceRenton Figure C1 Western Discharge Downstream Flow Path 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. Legend 512 5120 752 Feet 4,514 256 City and County Labels Addresses Parcels City and County Boundary Renton <all other values> 5' Primary 5' Intermediate Network Structures Public Access Riser Private Access Riser Public Inlet Private Inlet Public Manhole Private Manhole Public Utility Vault Private Utility Vault Public Clean Out Private Clean Out Public Unknown Private Unknown 1,200 Linear Feet Downstream Flow Path Western Discharge Vegetated Dispersion Area Western Discharge Projected Flow Path DISCHARGE DISPERSION AREA PROJECT LOCATION 1,400 L F + / - Figure C1 SE 190 ST Intersection of 102nd Ave SE and SE 190th Street Stormwater Catch Basin FLO W Catch Basins In Front of Subject Parcel Ref ID # 117158Ref ID # 131209 Site Frontage FLOW FLOW Downstream Analysis Points of Interest Figure C1 Stormwater Catch Basin 102nd Ave SE Looking North. North of SE 190th Street Intersection of 102th Ave SE and SE 192nd Street Stormwater Catch Basin FLOW FLOW 102nd Ave SE Looking South. South of SE 190th Street Figure C1 Stormwater Catch Basin F L O W West of Intersection of 102th Ave SE and SE 192nd Street Stormwater Catch Basin FLOW SE 192nd Street East of 99th Place South Approximately 0.25 Miles from Site Figure C1 Downstream City of Renton Construction As-builts Figure C1 Figure C1 Figure C1 Figure C1 APPENDIX D: WWHM REPORT CALCULATIONS WWHM2012 PROJECT REPORT WWHM Report for All TDA's On-site and Off-site Development Illustrating Total Discharge 4-30-2025 Figure D1 Dulay All TDAs 4-30-2025 4/30/2025 11:41:36 AM Page 2 General Model Information WWHM2012 Project Name:Dulay All TDAs 4-30-2025 Site Name:Dulay TDA #2 Site Address:18855 102nd Ave se City:Renton Report Date:4/30/2025 Gage:Seatac Data Start:1948/10/01 Data End:2009/09/30 Timestep:15 Minute Precip Scale:1.000 Version Date:2024/10/15 Version:4.3.1 POC Thresholds Low Flow Threshold for POC1:50 Percent of the 2 Year High Flow Threshold for POC1:50 Year Dulay All TDAs 4-30-2025 4/30/2025 11:41:36 AM Page 3 Landuse Basin Data Predeveloped Land Use Existing TDA #2 Bypass:No GroundWater:No Pervious Land Use acre C, Forest, Mod 0.827 Pervious Total 0.827 Impervious Land Use acre Impervious Total 0 Basin Total 0.827 Element Flow Componants: Surface Interflow Groundwater Componant Flows To: POC 1 POC 1 Dulay All TDAs 4-30-2025 4/30/2025 11:41:36 AM Page 4 Existing Frontage - TDA #3 Bypass:No GroundWater:No Pervious Land Use acre C, Forest, Flat 0.0562 Pervious Total 0.0562 Impervious Land Use acre Impervious Total 0 Basin Total 0.0562 Element Flow Componants: Surface Interflow Groundwater Componant Flows To: POC 1 POC 1 Dulay All TDAs 4-30-2025 4/30/2025 11:41:36 AM Page 5 Existing TDA#1 Bypass:No GroundWater:No Pervious Land Use acre C, Forest, Mod 0.35 Pervious Total 0.35 Impervious Land Use acre Impervious Total 0 Basin Total 0.35 Element Flow Componants: Surface Interflow Groundwater Componant Flows To: POC 1 POC 1 Dulay All TDAs 4-30-2025 4/30/2025 11:41:36 AM Page 6 Mitigated Land Use Roof Areas - TDA #2 Bypass:No GroundWater:No Pervious Land Use acre Pervious Total 0 Impervious Land Use acre ROOF TOPS FLAT 0.1837 Impervious Total 0.1837 Basin Total 0.1837 Element Flow Componants: Surface Interflow Groundwater Componant Flows To: Gravel Trench Bed 1 Gravel Trench Bed 1 Dulay All TDAs 4-30-2025 4/30/2025 11:41:36 AM Page 7 Lateral Basin - A/B, Lawn, Flat TDA #2 Bypass:No GroundWater:No Pervious Land Use acre A B, Lawn, Flat .402 Element Flow Componants: Surface Interflow Groundwater Componant Flows To: Permeable Pavement PVT Road TDA #2 Dulay All TDAs 4-30-2025 4/30/2025 11:41:36 AM Page 8 Frontage - TDA #3 Bypass:Yes GroundWater:No Pervious Land Use acre C, Lawn, Flat 0.02921 Pervious Total 0.02921 Impervious Land Use acre ROADS FLAT 0.00519 DRIVEWAYS FLAT 0.0054 SIDEWALKS FLAT 0.0161 Impervious Total 0.02669 Basin Total 0.0559 Element Flow Componants: Surface Interflow Groundwater Componant Flows To: POC 1 POC 1 Dulay All TDAs 4-30-2025 4/30/2025 11:41:36 AM Page 9 Developed - TDA #1 Bypass:Yes GroundWater:No Pervious Land Use acre C, Forest, Mod 0.35 Pervious Total 0.35 Impervious Land Use acre Impervious Total 0 Basin Total 0.35 Element Flow Componants: Surface Interflow Groundwater Componant Flows To: POC 1 POC 1 Dulay All TDAs 4-30-2025 4/30/2025 11:41:36 AM Page 10 Routing Elements Predeveloped Routing Dulay All TDAs 4-30-2025 4/30/2025 11:41:36 AM Page 11 Mitigated Routing Gravel Trench Bed 1 Bottom Length:100.00 ft. Bottom Width:25.00 ft. Trench bottom slope 1:0 To 1 Trench Left side slope 0:0 To 1 Trench right side slope 2:0 To 1 Material thickness of first layer:2 Pour Space of material for first layer:0.4 Material thickness of second layer:0 Pour Space of material for second layer:0 Material thickness of third layer:0 Pour Space of material for third layer:0 Infiltration On Infiltration rate:0.324 Infiltration safety factor:1 Total Volume Infiltrated (ac-ft.):28.844 Total Volume Through Riser (ac-ft.):0 Total Volume Through Facility (ac-ft.):28.844 Percent Infiltrated:100 Total Precip Applied to Facility:0 Total Evap From Facility:0 Discharge Structure Riser Height:0 ft. Riser Diameter:0 in. Element Outlets: Outlet 1 Outlet 2 Outlet Flows To: Gravel Trench Bed Hydraulic Table Stage(feet)Area(ac.)Volume(ac-ft.)Discharge(cfs)Infilt(cfs) 0.0000 0.057 0.000 0.000 0.000 0.0222 0.057 0.000 0.000 0.018 0.0444 0.057 0.001 0.000 0.018 0.0667 0.057 0.001 0.000 0.018 0.0889 0.057 0.002 0.000 0.018 0.1111 0.057 0.002 0.000 0.018 0.1333 0.057 0.003 0.000 0.018 0.1556 0.057 0.003 0.000 0.018 0.1778 0.057 0.004 0.000 0.018 0.2000 0.057 0.004 0.000 0.018 0.2222 0.057 0.005 0.000 0.018 0.2444 0.057 0.005 0.000 0.018 0.2667 0.057 0.006 0.000 0.018 0.2889 0.057 0.006 0.000 0.018 0.3111 0.057 0.007 0.000 0.018 0.3333 0.057 0.007 0.000 0.018 0.3556 0.057 0.008 0.000 0.018 0.3778 0.057 0.008 0.000 0.018 0.4000 0.057 0.009 0.000 0.018 0.4222 0.057 0.009 0.000 0.018 0.4444 0.057 0.010 0.000 0.018 0.4667 0.057 0.010 0.000 0.018 0.4889 0.057 0.011 0.000 0.018 Dulay All TDAs 4-30-2025 4/30/2025 11:41:36 AM Page 12 0.5111 0.057 0.011 0.000 0.018 0.5333 0.057 0.012 0.000 0.018 0.5556 0.057 0.012 0.000 0.018 0.5778 0.057 0.013 0.000 0.018 0.6000 0.057 0.013 0.000 0.018 0.6222 0.057 0.014 0.000 0.018 0.6444 0.057 0.014 0.000 0.018 0.6667 0.057 0.015 0.000 0.018 0.6889 0.057 0.015 0.000 0.018 0.7111 0.057 0.016 0.000 0.018 0.7333 0.057 0.016 0.000 0.018 0.7556 0.057 0.017 0.000 0.018 0.7778 0.057 0.017 0.000 0.018 0.8000 0.057 0.018 0.000 0.018 0.8222 0.057 0.018 0.000 0.018 0.8444 0.057 0.019 0.000 0.018 0.8667 0.057 0.019 0.000 0.018 0.8889 0.057 0.020 0.000 0.018 0.9111 0.057 0.020 0.000 0.018 0.9333 0.057 0.021 0.000 0.018 0.9556 0.057 0.021 0.000 0.018 0.9778 0.057 0.022 0.000 0.018 1.0000 0.057 0.023 0.000 0.018 1.0222 0.057 0.023 0.000 0.018 1.0444 0.057 0.024 0.000 0.018 1.0667 0.057 0.024 0.000 0.018 1.0889 0.057 0.025 0.000 0.018 1.1111 0.057 0.025 0.000 0.018 1.1333 0.057 0.026 0.000 0.018 1.1556 0.057 0.026 0.000 0.018 1.1778 0.057 0.027 0.000 0.018 1.2000 0.057 0.027 0.000 0.018 1.2222 0.057 0.028 0.000 0.018 1.2444 0.057 0.028 0.000 0.018 1.2667 0.057 0.029 0.000 0.018 1.2889 0.057 0.029 0.000 0.018 1.3111 0.057 0.030 0.000 0.018 1.3333 0.057 0.030 0.000 0.018 1.3556 0.057 0.031 0.000 0.018 1.3778 0.057 0.031 0.000 0.018 1.4000 0.057 0.032 0.000 0.018 1.4222 0.057 0.032 0.000 0.018 1.4444 0.057 0.033 0.000 0.018 1.4667 0.057 0.033 0.000 0.018 1.4889 0.057 0.034 0.000 0.018 1.5111 0.057 0.034 0.000 0.018 1.5333 0.057 0.035 0.000 0.018 1.5556 0.057 0.035 0.000 0.018 1.5778 0.057 0.036 0.000 0.018 1.6000 0.057 0.036 0.000 0.018 1.6222 0.057 0.037 0.000 0.018 1.6444 0.057 0.037 0.000 0.018 1.6667 0.057 0.038 0.000 0.018 1.6889 0.057 0.038 0.000 0.018 1.7111 0.057 0.039 0.000 0.018 1.7333 0.057 0.039 0.000 0.018 1.7556 0.057 0.040 0.000 0.018 1.7778 0.057 0.040 0.000 0.018 Dulay All TDAs 4-30-2025 4/30/2025 11:41:36 AM Page 13 1.8000 0.057 0.041 0.000 0.018 1.8222 0.057 0.041 0.000 0.018 1.8444 0.057 0.042 0.000 0.018 1.8667 0.057 0.042 0.000 0.018 1.8889 0.057 0.043 0.000 0.018 1.9111 0.057 0.043 0.000 0.018 1.9333 0.057 0.044 0.000 0.018 1.9556 0.057 0.044 0.000 0.018 1.9778 0.057 0.045 0.000 0.018 2.0000 0.057 0.045 0.000 0.018 Dulay All TDAs 4-30-2025 4/30/2025 11:41:36 AM Page 14 Permeable Pavement PVT Road TDA #2 Pavement Area:0.1657 acre.Pavement Length: 361.00 ft. Pavement Width: 20.00 ft. Pavement slope 1:0 To 1 Pavement thickness: 0.666 Pour Space of Pavement: 0.29 Material thickness of second layer: 1 Pour Space of material for second layer: 0.4 Material thickness of third layer: 0 Pour Space of material for third layer: 0 Infiltration On Infiltration rate:0.324 Infiltration safety factor:1 Total Volume Infiltrated (ac-ft.):24.489 Total Volume Through Riser (ac-ft.):0 Total Volume Through Facility (ac-ft.):24.489 Percent Infiltrated:100 Total Precip Applied to Facility:0 Total Evap From Facility:1.751 Discharge Structure Riser Height:1.666 ft. Riser Diameter:240 in. Notch Type:Rectangular Notch Width:5.000 ft. Notch Height:0.000 ft. Element Outlets: Outlet 1 Outlet 2 Outlet Flows To: Permeable Pavement Hydraulic Table Stage(feet)Area(ac.)Volume(ac-ft.)Discharge(cfs)Infilt(cfs) 0.0000 0.165 0.000 0.000 0.000 0.0185 0.165 0.001 0.000 0.054 0.0370 0.165 0.002 0.000 0.054 0.0555 0.165 0.003 0.000 0.054 0.0740 0.165 0.004 0.000 0.054 0.0926 0.165 0.006 0.000 0.054 0.1111 0.165 0.007 0.000 0.054 0.1296 0.165 0.008 0.000 0.054 0.1481 0.165 0.009 0.000 0.054 0.1666 0.165 0.011 0.000 0.054 0.1851 0.165 0.012 0.000 0.054 0.2036 0.165 0.013 0.000 0.054 0.2221 0.165 0.014 0.000 0.054 0.2406 0.165 0.016 0.000 0.054 0.2592 0.165 0.017 0.000 0.054 0.2777 0.165 0.018 0.000 0.054 0.2962 0.165 0.019 0.000 0.054 0.3147 0.165 0.020 0.000 0.054 0.3332 0.165 0.022 0.000 0.054 0.3517 0.165 0.023 0.000 0.054 0.3702 0.165 0.024 0.000 0.054 0.3887 0.165 0.025 0.000 0.054 0.4072 0.165 0.027 0.000 0.054 0.4258 0.165 0.028 0.000 0.054 Dulay All TDAs 4-30-2025 4/30/2025 11:41:36 AM Page 15 0.4443 0.165 0.029 0.000 0.054 0.4628 0.165 0.030 0.000 0.054 0.4813 0.165 0.031 0.000 0.054 0.4998 0.165 0.033 0.000 0.054 0.5183 0.165 0.034 0.000 0.054 0.5368 0.165 0.035 0.000 0.054 0.5553 0.165 0.036 0.000 0.054 0.5738 0.165 0.038 0.000 0.054 0.5924 0.165 0.039 0.000 0.054 0.6109 0.165 0.040 0.000 0.054 0.6294 0.165 0.041 0.000 0.054 0.6479 0.165 0.043 0.000 0.054 0.6664 0.165 0.044 0.000 0.054 0.6849 0.165 0.045 0.000 0.054 0.7034 0.165 0.046 0.000 0.054 0.7219 0.165 0.047 0.000 0.054 0.7404 0.165 0.049 0.000 0.054 0.7590 0.165 0.050 0.000 0.054 0.7775 0.165 0.051 0.000 0.054 0.7960 0.165 0.052 0.000 0.054 0.8145 0.165 0.054 0.000 0.054 0.8330 0.165 0.055 0.000 0.054 0.8515 0.165 0.056 0.000 0.054 0.8700 0.165 0.057 0.000 0.054 0.8885 0.165 0.058 0.000 0.054 0.9070 0.165 0.060 0.000 0.054 0.9256 0.165 0.061 0.000 0.054 0.9441 0.165 0.062 0.000 0.054 0.9626 0.165 0.063 0.000 0.054 0.9811 0.165 0.065 0.000 0.054 0.9996 0.165 0.066 0.000 0.054 1.0181 0.165 0.067 0.000 0.054 1.0366 0.165 0.068 0.000 0.054 1.0551 0.165 0.068 0.000 0.054 1.0736 0.165 0.069 0.000 0.054 1.0922 0.165 0.070 0.000 0.054 1.1107 0.165 0.071 0.000 0.054 1.1292 0.165 0.072 0.000 0.054 1.1477 0.165 0.073 0.000 0.054 1.1662 0.165 0.074 0.000 0.054 1.1847 0.165 0.075 0.000 0.054 1.2032 0.165 0.076 0.000 0.054 1.2217 0.165 0.077 0.000 0.054 1.2402 0.165 0.077 0.000 0.054 1.2588 0.165 0.078 0.000 0.054 1.2773 0.165 0.079 0.000 0.054 1.2958 0.165 0.080 0.000 0.054 1.3143 0.165 0.081 0.000 0.054 1.3328 0.165 0.082 0.000 0.054 1.3513 0.165 0.083 0.000 0.054 1.3698 0.165 0.084 0.000 0.054 1.3883 0.165 0.085 0.000 0.054 1.4068 0.165 0.085 0.000 0.054 1.4254 0.165 0.086 0.000 0.054 1.4439 0.165 0.087 0.000 0.054 1.4624 0.165 0.088 0.000 0.054 1.4809 0.165 0.089 0.000 0.054 1.4994 0.165 0.090 0.000 0.054 Dulay All TDAs 4-30-2025 4/30/2025 11:41:36 AM Page 16 1.5179 0.165 0.091 0.000 0.054 1.5364 0.165 0.092 0.000 0.054 1.5549 0.165 0.093 0.000 0.054 1.5734 0.165 0.093 0.000 0.054 1.5920 0.165 0.094 0.000 0.054 1.6105 0.165 0.095 0.000 0.054 1.6290 0.165 0.096 0.000 0.054 1.6475 0.165 0.097 0.000 0.054 Dulay All TDAs 4-30-2025 4/30/2025 11:41:36 AM Page 17 Permeable Pavement - Driveway - TDA #2 Pavement Area:0.0752 acre.Pavement Length: 163.85 ft. Pavement Width: 20.00 ft. Pavement slope 1:0 To 1 Pavement thickness: 0.666 Pour Space of Pavement: 0.29 Material thickness of second layer: 1 Pour Space of material for second layer: 0.4 Material thickness of third layer: 0 Pour Space of material for third layer: 0 Infiltration On Infiltration rate:0.324 Infiltration safety factor:1 Total Volume Infiltrated (ac-ft.):11.016 Total Volume Through Riser (ac-ft.):0 Total Volume Through Facility (ac-ft.):11.016 Percent Infiltrated:100 Total Precip Applied to Facility:0 Total Evap From Facility:0.794 Discharge Structure Riser Height:1.666 ft. Riser Diameter:240 in. Notch Type:Rectangular Notch Width:5.000 ft. Notch Height:0.000 ft. Element Outlets: Outlet 1 Outlet 2 Outlet Flows To: Permeable Pavement Hydraulic Table Stage(feet)Area(ac.)Volume(ac-ft.)Discharge(cfs)Infilt(cfs) 0.0000 0.075 0.000 0.000 0.000 0.0185 0.075 0.000 0.000 0.024 0.0370 0.075 0.001 0.000 0.024 0.0555 0.075 0.001 0.000 0.024 0.0740 0.075 0.002 0.000 0.024 0.0926 0.075 0.002 0.000 0.024 0.1111 0.075 0.003 0.000 0.024 0.1296 0.075 0.003 0.000 0.024 0.1481 0.075 0.004 0.000 0.024 0.1666 0.075 0.005 0.000 0.024 0.1851 0.075 0.005 0.000 0.024 0.2036 0.075 0.006 0.000 0.024 0.2221 0.075 0.006 0.000 0.024 0.2406 0.075 0.007 0.000 0.024 0.2592 0.075 0.007 0.000 0.024 0.2777 0.075 0.008 0.000 0.024 0.2962 0.075 0.008 0.000 0.024 0.3147 0.075 0.009 0.000 0.024 0.3332 0.075 0.010 0.000 0.024 0.3517 0.075 0.010 0.000 0.024 0.3702 0.075 0.011 0.000 0.024 0.3887 0.075 0.011 0.000 0.024 0.4072 0.075 0.012 0.000 0.024 0.4258 0.075 0.012 0.000 0.024 Dulay All TDAs 4-30-2025 4/30/2025 11:41:36 AM Page 18 0.4443 0.075 0.013 0.000 0.024 0.4628 0.075 0.013 0.000 0.024 0.4813 0.075 0.014 0.000 0.024 0.4998 0.075 0.015 0.000 0.024 0.5183 0.075 0.015 0.000 0.024 0.5368 0.075 0.016 0.000 0.024 0.5553 0.075 0.016 0.000 0.024 0.5738 0.075 0.017 0.000 0.024 0.5924 0.075 0.017 0.000 0.024 0.6109 0.075 0.018 0.000 0.024 0.6294 0.075 0.018 0.000 0.024 0.6479 0.075 0.019 0.000 0.024 0.6664 0.075 0.020 0.000 0.024 0.6849 0.075 0.020 0.000 0.024 0.7034 0.075 0.021 0.000 0.024 0.7219 0.075 0.021 0.000 0.024 0.7404 0.075 0.022 0.000 0.024 0.7590 0.075 0.022 0.000 0.024 0.7775 0.075 0.023 0.000 0.024 0.7960 0.075 0.024 0.000 0.024 0.8145 0.075 0.024 0.000 0.024 0.8330 0.075 0.025 0.000 0.024 0.8515 0.075 0.025 0.000 0.024 0.8700 0.075 0.026 0.000 0.024 0.8885 0.075 0.026 0.000 0.024 0.9070 0.075 0.027 0.000 0.024 0.9256 0.075 0.027 0.000 0.024 0.9441 0.075 0.028 0.000 0.024 0.9626 0.075 0.029 0.000 0.024 0.9811 0.075 0.029 0.000 0.024 0.9996 0.075 0.030 0.000 0.024 1.0181 0.075 0.030 0.000 0.024 1.0366 0.075 0.030 0.000 0.024 1.0551 0.075 0.031 0.000 0.024 1.0736 0.075 0.031 0.000 0.024 1.0922 0.075 0.032 0.000 0.024 1.1107 0.075 0.032 0.000 0.024 1.1292 0.075 0.032 0.000 0.024 1.1477 0.075 0.033 0.000 0.024 1.1662 0.075 0.033 0.000 0.024 1.1847 0.075 0.034 0.000 0.024 1.2032 0.075 0.034 0.000 0.024 1.2217 0.075 0.034 0.000 0.024 1.2402 0.075 0.035 0.000 0.024 1.2588 0.075 0.035 0.000 0.024 1.2773 0.075 0.036 0.000 0.024 1.2958 0.075 0.036 0.000 0.024 1.3143 0.075 0.036 0.000 0.024 1.3328 0.075 0.037 0.000 0.024 1.3513 0.075 0.037 0.000 0.024 1.3698 0.075 0.038 0.000 0.024 1.3883 0.075 0.038 0.000 0.024 1.4068 0.075 0.039 0.000 0.024 1.4254 0.075 0.039 0.000 0.024 1.4439 0.075 0.039 0.000 0.024 1.4624 0.075 0.040 0.000 0.024 1.4809 0.075 0.040 0.000 0.024 1.4994 0.075 0.041 0.000 0.024 Dulay All TDAs 4-30-2025 4/30/2025 11:41:36 AM Page 19 1.5179 0.075 0.041 0.000 0.024 1.5364 0.075 0.041 0.000 0.024 1.5549 0.075 0.042 0.000 0.024 1.5734 0.075 0.042 0.000 0.024 1.5920 0.075 0.043 0.000 0.024 1.6105 0.075 0.043 0.000 0.024 1.6290 0.075 0.043 0.000 0.024 1.6475 0.075 0.044 0.000 0.024 Dulay All TDAs 4-30-2025 4/30/2025 11:41:36 AM Page 20 Analysis Results POC 1 + Predeveloped x Mitigated Predeveloped Landuse Totals for POC #1 Total Pervious Area:1.2332 Total Impervious Area:0 Mitigated Landuse Totals for POC #1 Total Pervious Area:0.78121 Total Impervious Area:0.451368 Flow Frequency Method:Log Pearson Type III 17B Flow Frequency Return Periods for Predeveloped. POC #1 Return Period Flow(cfs) 2 year 0.036642 5 year 0.060011 10 year 0.075032 25 year 0.092895 50 year 0.105267 100 year 0.116821 Flow Frequency Return Periods for Mitigated. POC #1 Return Period Flow(cfs) 2 year 0.01977 5 year 0.029419 10 year 0.036693 25 year 0.046914 50 year 0.055295 100 year 0.064352 Annual Peaks Dulay All TDAs 4-30-2025 4/30/2025 11:42:19 AM Page 21 Annual Peaks for Predeveloped and Mitigated. POC #1 Year Predeveloped Mitigated 1949 0.042 0.029 1950 0.050 0.029 1951 0.080 0.030 1952 0.025 0.014 1953 0.020 0.011 1954 0.031 0.016 1955 0.050 0.021 1956 0.040 0.020 1957 0.032 0.022 1958 0.036 0.016 1959 0.031 0.014 1960 0.055 0.027 1961 0.030 0.018 1962 0.019 0.010 1963 0.026 0.017 1964 0.037 0.018 1965 0.025 0.020 1966 0.024 0.014 1967 0.056 0.031 1968 0.032 0.020 1969 0.031 0.018 1970 0.025 0.018 1971 0.028 0.020 1972 0.061 0.026 1973 0.027 0.013 1974 0.030 0.019 1975 0.042 0.025 1976 0.030 0.018 1977 0.004 0.010 1978 0.025 0.014 1979 0.015 0.015 1980 0.071 0.038 1981 0.023 0.015 1982 0.046 0.033 1983 0.040 0.018 1984 0.024 0.013 1985 0.014 0.013 1986 0.063 0.026 1987 0.056 0.026 1988 0.022 0.011 1989 0.014 0.011 1990 0.132 0.067 1991 0.071 0.041 1992 0.029 0.017 1993 0.028 0.013 1994 0.009 0.007 1995 0.040 0.018 1996 0.093 0.040 1997 0.072 0.029 1998 0.018 0.015 1999 0.078 0.043 2000 0.028 0.018 2001 0.005 0.012 2002 0.032 0.021 2003 0.048 0.027 2004 0.052 0.031 Dulay All TDAs 4-30-2025 4/30/2025 11:42:19 AM Page 22 2005 0.038 0.021 2006 0.043 0.021 2007 0.100 0.055 2008 0.122 0.052 2009 0.057 0.029 Ranked Annual Peaks Ranked Annual Peaks for Predeveloped and Mitigated. POC #1 Rank Predeveloped Mitigated 1 0.1322 0.0669 2 0.1220 0.0548 3 0.0998 0.0515 4 0.0927 0.0428 5 0.0802 0.0412 6 0.0782 0.0400 7 0.0718 0.0384 8 0.0710 0.0326 9 0.0705 0.0313 10 0.0629 0.0306 11 0.0608 0.0303 12 0.0570 0.0295 13 0.0561 0.0294 14 0.0555 0.0293 15 0.0553 0.0288 16 0.0517 0.0272 17 0.0499 0.0270 18 0.0499 0.0262 19 0.0480 0.0261 20 0.0464 0.0260 21 0.0432 0.0253 22 0.0419 0.0225 23 0.0416 0.0215 24 0.0403 0.0212 25 0.0402 0.0211 26 0.0397 0.0206 27 0.0383 0.0202 28 0.0368 0.0199 29 0.0360 0.0199 30 0.0323 0.0196 31 0.0323 0.0192 32 0.0316 0.0184 33 0.0312 0.0184 34 0.0309 0.0180 35 0.0308 0.0180 36 0.0304 0.0179 37 0.0299 0.0176 38 0.0297 0.0176 39 0.0287 0.0175 40 0.0281 0.0167 41 0.0280 0.0166 42 0.0279 0.0158 43 0.0270 0.0157 44 0.0260 0.0151 45 0.0252 0.0150 46 0.0251 0.0150 47 0.0248 0.0142 48 0.0245 0.0141 49 0.0240 0.0140 Dulay All TDAs 4-30-2025 4/30/2025 11:42:19 AM Page 23 50 0.0236 0.0139 51 0.0225 0.0131 52 0.0219 0.0129 53 0.0203 0.0128 54 0.0189 0.0127 55 0.0175 0.0118 56 0.0152 0.0111 57 0.0145 0.0108 58 0.0142 0.0106 59 0.0094 0.0103 60 0.0050 0.0096 61 0.0043 0.0073 Dulay All TDAs 4-30-2025 4/30/2025 11:42:19 AM Page 24 LID Duration Flows The Facility PASSED Flow(cfs)Predev Mit Percentage Pass/Fail 0.0029 227791 89876 39 Pass 0.0031 219235 83245 37 Pass 0.0032 211214 77235 36 Pass 0.0034 203557 71802 35 Pass 0.0036 196242 66861 34 Pass 0.0037 189334 62327 32 Pass 0.0039 182810 58092 31 Pass 0.0040 176671 54114 30 Pass 0.0042 170768 50563 29 Pass 0.0043 165228 47291 28 Pass 0.0045 159988 44253 27 Pass 0.0046 154940 41409 26 Pass 0.0048 150171 38778 25 Pass 0.0050 145572 36254 24 Pass 0.0051 141209 34008 24 Pass 0.0053 136888 31955 23 Pass 0.0054 132782 30073 22 Pass 0.0056 128761 28276 21 Pass 0.0057 124889 26608 21 Pass 0.0059 121146 25089 20 Pass 0.0060 117510 23677 20 Pass 0.0062 114002 22287 19 Pass 0.0064 110601 21062 19 Pass 0.0065 107243 19887 18 Pass 0.0067 104014 18799 18 Pass 0.0068 100934 17836 17 Pass 0.0070 97939 16940 17 Pass 0.0071 95073 16099 16 Pass 0.0073 92314 15306 16 Pass 0.0074 89640 14581 16 Pass 0.0076 87138 13809 15 Pass 0.0078 84700 13105 15 Pass 0.0079 82325 12506 15 Pass 0.0081 79973 11905 14 Pass 0.0082 77791 11377 14 Pass 0.0084 75609 10833 14 Pass 0.0085 73535 10333 14 Pass 0.0087 71567 9871 13 Pass 0.0088 69706 9437 13 Pass 0.0090 67845 9060 13 Pass 0.0091 65984 8647 13 Pass 0.0093 64252 8303 12 Pass 0.0095 62584 7954 12 Pass 0.0096 61001 7614 12 Pass 0.0098 59482 7287 12 Pass 0.0099 58049 6975 12 Pass 0.0101 56595 6708 11 Pass 0.0102 55204 6451 11 Pass 0.0104 53771 6186 11 Pass 0.0105 52531 5963 11 Pass 0.0107 51183 5736 11 Pass 0.0109 49986 5527 11 Pass 0.0110 48724 5341 10 Pass Dulay All TDAs 4-30-2025 4/30/2025 11:42:19 AM Page 25 0.0112 47505 5133 10 Pass 0.0113 46392 4924 10 Pass 0.0115 45195 4731 10 Pass 0.0116 44168 4545 10 Pass 0.0118 43098 4363 10 Pass 0.0119 42136 4194 9 Pass 0.0121 41152 4049 9 Pass 0.0123 40190 3923 9 Pass 0.0124 39206 3771 9 Pass 0.0126 38350 3634 9 Pass 0.0127 37409 3516 9 Pass 0.0129 36511 3382 9 Pass 0.0130 35655 3264 9 Pass 0.0132 34842 3146 9 Pass 0.0133 34051 3031 8 Pass 0.0135 33238 2915 8 Pass 0.0137 32468 2817 8 Pass 0.0138 31741 2710 8 Pass 0.0140 31014 2607 8 Pass 0.0141 30287 2505 8 Pass 0.0143 29581 2402 8 Pass 0.0144 28918 2316 8 Pass 0.0146 28255 2237 7 Pass 0.0147 27592 2162 7 Pass 0.0149 26971 2077 7 Pass 0.0151 26394 2002 7 Pass 0.0152 25774 1935 7 Pass 0.0154 25260 1868 7 Pass 0.0155 24683 1810 7 Pass 0.0157 24191 1745 7 Pass 0.0158 23677 1681 7 Pass 0.0160 23207 1622 6 Pass 0.0161 22715 1566 6 Pass 0.0163 22244 1507 6 Pass 0.0165 21838 1452 6 Pass 0.0166 21389 1399 6 Pass 0.0168 20991 1346 6 Pass 0.0169 20570 1297 6 Pass 0.0171 20163 1259 6 Pass 0.0172 19723 1216 6 Pass 0.0174 19342 1161 6 Pass 0.0175 18912 1122 5 Pass 0.0177 18546 1090 5 Pass 0.0179 18163 1059 5 Pass 0.0180 17817 1029 5 Pass 0.0182 17500 997 5 Pass 0.0183 17169 970 5 Pass Dulay All TDAs 4-30-2025 4/30/2025 11:42:31 AM Page 26 Duration Flows The Facility PASSED Flow(cfs)Predev Mit Percentage Pass/Fail 0.0183 17169 970 5 Pass 0.0192 15558 809 5 Pass 0.0201 14134 662 4 Pass 0.0210 12857 548 4 Pass 0.0218 11638 448 3 Pass 0.0227 10572 355 3 Pass 0.0236 9629 273 2 Pass 0.0245 8821 221 2 Pass 0.0253 8091 174 2 Pass 0.0262 7392 139 1 Pass 0.0271 6780 106 1 Pass 0.0280 6228 82 1 Pass 0.0289 5775 60 1 Pass 0.0297 5345 47 0 Pass 0.0306 4960 38 0 Pass 0.0315 4605 34 0 Pass 0.0324 4267 28 0 Pass 0.0333 3974 23 0 Pass 0.0341 3677 21 0 Pass 0.0350 3418 19 0 Pass 0.0359 3163 17 0 Pass 0.0368 2941 16 0 Pass 0.0376 2725 15 0 Pass 0.0385 2511 14 0 Pass 0.0394 2342 9 0 Pass 0.0403 2160 8 0 Pass 0.0412 1999 8 0 Pass 0.0420 1841 7 0 Pass 0.0429 1722 6 0 Pass 0.0438 1592 6 0 Pass 0.0447 1459 5 0 Pass 0.0455 1343 5 0 Pass 0.0464 1244 5 0 Pass 0.0473 1161 5 0 Pass 0.0482 1093 5 0 Pass 0.0491 1027 5 0 Pass 0.0499 961 4 0 Pass 0.0508 896 4 0 Pass 0.0517 838 3 0 Pass 0.0526 777 3 0 Pass 0.0535 729 3 0 Pass 0.0543 683 2 0 Pass 0.0552 634 1 0 Pass 0.0561 596 1 0 Pass 0.0570 563 1 0 Pass 0.0578 512 1 0 Pass 0.0587 475 1 0 Pass 0.0596 431 1 0 Pass 0.0605 390 1 0 Pass 0.0614 359 1 0 Pass 0.0622 333 1 0 Pass 0.0631 304 1 0 Pass 0.0640 275 1 0 Pass Dulay All TDAs 4-30-2025 4/30/2025 11:42:31 AM Page 27 0.0649 249 1 0 Pass 0.0657 224 1 0 Pass 0.0666 202 1 0 Pass 0.0675 179 0 0 Pass 0.0684 153 0 0 Pass 0.0693 133 0 0 Pass 0.0701 122 0 0 Pass 0.0710 108 0 0 Pass 0.0719 97 0 0 Pass 0.0728 86 0 0 Pass 0.0737 78 0 0 Pass 0.0745 69 0 0 Pass 0.0754 64 0 0 Pass 0.0763 55 0 0 Pass 0.0772 47 0 0 Pass 0.0780 42 0 0 Pass 0.0789 32 0 0 Pass 0.0798 26 0 0 Pass 0.0807 22 0 0 Pass 0.0816 21 0 0 Pass 0.0824 18 0 0 Pass 0.0833 14 0 0 Pass 0.0842 13 0 0 Pass 0.0851 11 0 0 Pass 0.0859 7 0 0 Pass 0.0868 7 0 0 Pass 0.0877 7 0 0 Pass 0.0886 6 0 0 Pass 0.0895 6 0 0 Pass 0.0903 6 0 0 Pass 0.0912 6 0 0 Pass 0.0921 6 0 0 Pass 0.0930 5 0 0 Pass 0.0938 5 0 0 Pass 0.0947 5 0 0 Pass 0.0956 5 0 0 Pass 0.0965 5 0 0 Pass 0.0974 5 0 0 Pass 0.0982 5 0 0 Pass 0.0991 4 0 0 Pass 0.1000 3 0 0 Pass 0.1009 3 0 0 Pass 0.1018 3 0 0 Pass 0.1026 3 0 0 Pass 0.1035 3 0 0 Pass 0.1044 3 0 0 Pass 0.1053 3 0 0 Pass Dulay All TDAs 4-30-2025 4/30/2025 11:42:31 AM Page 28 Water Quality Water Quality BMP Flow and Volume for POC #1 On-line facility volume:0.0179 acre-feet On-line facility target flow:0.0103 cfs. Adjusted for 15 min:0.0103 cfs. Off-line facility target flow:0.0056 cfs. Adjusted for 15 min:0.0056 cfs. Dulay All TDAs 4-30-2025 4/30/2025 11:42:31 AM Page 29 LID Report Dulay All TDAs 4-30-2025 4/30/2025 11:42:36 AM Page 30 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. Dulay All TDAs 4-30-2025 4/30/2025 11:42:37 AM Page 31 Appendix Predeveloped Schematic Dulay All TDAs 4-30-2025 4/30/2025 11:42:37 AM Page 32 Mitigated Schematic Dulay All TDAs 4-30-2025 4/30/2025 11:42:37 AM Page 33 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 Dulay All TDAs 4-30-2025.wdm MESSU 25 PreDulay All TDAs 4-30-2025.MES 27 PreDulay All TDAs 4-30-2025.L61 28 PreDulay All TDAs 4-30-2025.L62 30 POCDulay All TDAs 4-30-20251.dat END FILES OPN SEQUENCE INGRP INDELT 00:15 PERLND 11 PERLND 10 COPY 501 DISPLY 1 END INGRP END OPN SEQUENCE DISPLY DISPLY-INFO1 # - #<----------Title----------->***TRAN PIVL DIG1 FIL1 PYR DIG2 FIL2 YRND 1 Existing TDA #2 MAX 1 2 30 9 END DISPLY-INFO1 END DISPLY COPY TIMESERIES # - # NPT NMN *** 1 1 1 501 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 *** 11 C, Forest, Mod 1 1 1 1 27 0 10 C, Forest, Flat 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 *** 11 0 0 1 0 0 0 0 0 0 0 0 0 10 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 ********* Dulay All TDAs 4-30-2025 4/30/2025 11:42:37 AM Page 34 11 0 0 4 0 0 0 0 0 0 0 0 0 1 9 10 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 *** 11 0 0 0 0 0 0 0 0 0 0 0 10 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 11 0 4.5 0.08 400 0.1 0.5 0.996 10 0 4.5 0.08 400 0.05 0.5 0.996 END PWAT-PARM2 PWAT-PARM3 <PLS > PWATER input info: Part 3 *** # - # ***PETMAX PETMIN INFEXP INFILD DEEPFR BASETP AGWETP 11 0 0 2 2 0 0 0 10 0 0 2 2 0 0 0 END PWAT-PARM3 PWAT-PARM4 <PLS > PWATER input info: Part 4 *** # - # CEPSC UZSN NSUR INTFW IRC LZETP *** 11 0.2 0.5 0.35 6 0.5 0.7 10 0.2 0.5 0.35 6 0.5 0.7 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 11 0 0 0 0 2.5 1 0 10 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 *** END GEN-INFO *** Section IWATER*** ACTIVITY <PLS > ************* Active Sections ***************************** # - # ATMP SNOW IWAT SLD IWG IQAL *** END ACTIVITY PRINT-INFO <ILS > ******** Print-flags ******** PIVL PYR # - # ATMP SNOW IWAT SLD IWG IQAL ********* END PRINT-INFO IWAT-PARM1 <PLS > IWATER variable monthly parameter value flags *** # - # CSNO RTOP VRS VNN RTLI *** END IWAT-PARM1 IWAT-PARM2 <PLS > IWATER input info: Part 2 *** # - # *** LSUR SLSUR NSUR RETSC END IWAT-PARM2 IWAT-PARM3 Dulay All TDAs 4-30-2025 4/30/2025 11:42:37 AM Page 35 <PLS > IWATER input info: Part 3 *** # - # ***PETMAX PETMIN END IWAT-PARM3 IWAT-STATE1 <PLS > *** Initial conditions at start of simulation # - # *** RETS SURS END IWAT-STATE1 END IMPLND SCHEMATIC <-Source-> <--Area--> <-Target-> MBLK *** <Name> # <-factor-> <Name> # Tbl# *** Existing TDA #2*** PERLND 11 0.827 COPY 501 12 PERLND 11 0.827 COPY 501 13 Existing Frontage - TDA #3 *** PERLND 10 0.0562 COPY 501 12 PERLND 10 0.0562 COPY 501 13 Existing TDA#1*** PERLND 11 0.35 COPY 501 12 PERLND 11 0.35 COPY 501 13 ******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 <-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 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 Dulay All TDAs 4-30-2025 4/30/2025 11:42:37 AM Page 36 *** 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 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 END MASS-LINK END RUN Dulay All TDAs 4-30-2025 4/30/2025 11:42:37 AM Page 37 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 Dulay All TDAs 4-30-2025.wdm MESSU 25 MitDulay All TDAs 4-30-2025.MES 27 MitDulay All TDAs 4-30-2025.L61 28 MitDulay All TDAs 4-30-2025.L62 30 POCDulay All TDAs 4-30-20251.dat END FILES OPN SEQUENCE INGRP INDELT 00:15 IMPLND 4 PERLND 38 IMPLND 17 RCHRES 1 PERLND 16 IMPLND 1 IMPLND 5 IMPLND 8 PERLND 11 RCHRES 2 IMPLND 16 RCHRES 3 COPY 1 COPY 501 COPY 601 DISPLY 1 END INGRP END OPN SEQUENCE DISPLY DISPLY-INFO1 # - #<----------Title----------->***TRAN PIVL DIG1 FIL1 PYR DIG2 FIL2 YRND 1 Permeable Pavement - Driv MAX 1 2 30 9 END DISPLY-INFO1 END DISPLY COPY TIMESERIES # - # NPT NMN *** 1 1 1 501 1 1 601 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 *** 38 A/B, Lawn, Flat 1 1 1 1 27 0 16 C, Lawn, Flat 1 1 1 1 27 0 Dulay All TDAs 4-30-2025 4/30/2025 11:42:37 AM Page 38 11 C, Forest, 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 *** 38 0 0 1 0 0 0 0 0 0 0 0 0 16 0 0 1 0 0 0 0 0 0 0 0 0 11 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 ********* 38 0 0 4 0 0 0 0 0 0 0 0 0 1 9 16 0 0 4 0 0 0 0 0 0 0 0 0 1 9 11 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 *** 38 0 0 0 0 0 0 0 0 0 0 0 16 0 0 0 0 0 0 0 0 0 0 0 11 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 38 0 5 0.8 400 0.05 0.3 0.996 16 0 4.5 0.03 400 0.05 0.5 0.996 11 0 4.5 0.08 400 0.1 0.5 0.996 END PWAT-PARM2 PWAT-PARM3 <PLS > PWATER input info: Part 3 *** # - # ***PETMAX PETMIN INFEXP INFILD DEEPFR BASETP AGWETP 38 0 0 2 2 0 0 0 16 0 0 2 2 0 0 0 11 0 0 2 2 0 0 0 END PWAT-PARM3 PWAT-PARM4 <PLS > PWATER input info: Part 4 *** # - # CEPSC UZSN NSUR INTFW IRC LZETP *** 38 0.1 0.5 0.25 0 0.7 0.25 16 0.1 0.25 0.25 6 0.5 0.25 11 0.2 0.5 0.35 6 0.5 0.7 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 38 0 0 0 0 3 1 0 16 0 0 0 0 2.5 1 0 11 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 17 Porous Pavement 1 1 1 27 0 1 ROADS/FLAT 1 1 1 27 0 Dulay All TDAs 4-30-2025 4/30/2025 11:42:37 AM Page 39 5 DRIVEWAYS/FLAT 1 1 1 27 0 8 SIDEWALKS/FLAT 1 1 1 27 0 16 Porous Pavement 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 17 0 0 1 0 0 0 1 0 0 1 0 0 0 5 0 0 1 0 0 0 8 0 0 1 0 0 0 16 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 4 1 9 17 0 0 4 0 0 0 1 9 1 0 0 4 0 0 0 1 9 5 0 0 4 0 0 0 1 9 8 0 0 4 0 0 0 1 9 16 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 *** 4 0 0 0 0 0 17 0 0 0 0 0 1 0 0 0 0 0 5 0 0 0 0 0 8 0 0 0 0 0 16 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 17 400 0.01 0.1 0.1 1 400 0.01 0.1 0.1 5 400 0.01 0.1 0.1 8 400 0.01 0.1 0.1 16 400 0.01 0.1 0.1 END IWAT-PARM2 IWAT-PARM3 <PLS > IWATER input info: Part 3 *** # - # ***PETMAX PETMIN 4 0 0 17 0 0 1 0 0 5 0 0 8 0 0 16 0 0 END IWAT-PARM3 IWAT-STATE1 <PLS > *** Initial conditions at start of simulation # - # *** RETS SURS 4 0 0 17 0 0 1 0 0 5 0 0 8 0 0 16 0 0 Dulay All TDAs 4-30-2025 4/30/2025 11:42:37 AM Page 40 END IWAT-STATE1 END IMPLND SCHEMATIC <-Source-> <--Area--> <-Target-> MBLK *** <Name> # <-factor-> <Name> # Tbl# *** Roof Areas - TDA #2*** IMPLND 4 0.1837 RCHRES 2 5 Lateral Basin - A/B, Lawn, Flat TDA #2*** PERLND 38 2.4254 IMPLND 16 54 IMPLND 16 0.1657 RCHRES 3 5 IMPLND 17 0.0752 RCHRES 1 5 Frontage - TDA #3*** PERLND 16 0.02921 COPY 501 12 PERLND 16 0.02921 COPY 601 12 PERLND 16 0.02921 COPY 501 13 PERLND 16 0.02921 COPY 601 13 IMPLND 1 0.00519 COPY 501 15 IMPLND 1 0.00519 COPY 601 15 IMPLND 5 0.0054 COPY 501 15 IMPLND 5 0.0054 COPY 601 15 IMPLND 8 0.0161 COPY 501 15 IMPLND 8 0.0161 COPY 601 15 Developed - TDA #1*** PERLND 11 0.35 COPY 501 12 PERLND 11 0.35 COPY 601 12 PERLND 11 0.35 COPY 501 13 PERLND 11 0.35 COPY 601 13 ******Routing****** IMPLND 4 0.1837 COPY 1 15 PERLND 38 0.402 COPY 1 12 RCHRES 2 1 COPY 501 17 RCHRES 3 1 COPY 501 17 RCHRES 1 1 COPY 501 17 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 <-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 *** 1 Permeable Paveme-009 2 1 1 1 28 0 1 2 Gravel Trench Be-006 2 1 1 1 28 0 1 3 Permeable Paveme-008 2 1 1 1 28 0 1 END GEN-INFO *** Section RCHRES*** ACTIVITY <PLS > ************* Active Sections ***************************** # - # HYFG ADFG CNFG HTFG SDFG GQFG OXFG NUFG PKFG PHFG *** 1 1 0 0 0 0 0 0 0 0 0 2 1 0 0 0 0 0 0 0 0 0 3 1 0 0 0 0 0 0 0 0 0 END ACTIVITY PRINT-INFO <PLS > ***************** Print-flags ******************* PIVL PYR Dulay All TDAs 4-30-2025 4/30/2025 11:42:37 AM Page 41 # - # HYDR ADCA CONS HEAT SED GQL OXRX NUTR PLNK PHCB PIVL PYR ********* 1 4 0 0 0 0 0 0 0 0 0 1 9 2 4 0 0 0 0 0 0 0 0 0 1 9 3 4 0 0 0 0 0 0 0 0 0 1 9 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 * * * * * * * * * * * * * * *** 1 0 1 0 0 4 5 0 0 0 0 0 0 0 0 2 2 2 2 2 2 0 1 0 0 4 5 0 0 0 0 0 0 0 0 2 2 2 2 2 3 0 1 0 0 4 5 0 0 0 0 0 0 0 0 2 2 2 2 2 END HYDR-PARM1 HYDR-PARM2 # - # FTABNO LEN DELTH STCOR KS DB50 *** <------><--------><--------><--------><--------><--------><--------> *** 1 1 0.03 0.0 0.0 0.5 0.0 2 2 0.02 0.0 0.0 0.5 0.0 3 3 0.07 0.0 0.0 0.5 0.0 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 <------><--------> <---><---><---><---><---> *** <---><---><---><---><---> 1 0 4.0 5.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 2 0 4.0 5.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 3 0 4.0 5.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 END HYDR-INIT END RCHRES SPEC-ACTIONS END SPEC-ACTIONS FTABLES FTABLE 2 92 5 Depth Area Volume Outflow1 Outflow2 Velocity Travel Time*** (ft) (acres) (acre-ft) (cfs) (cfs) (ft/sec) (Minutes)*** 0.000000 0.057392 0.000000 0.000000 0.000000 0.022222 0.057392 0.000510 0.000000 0.018750 0.044444 0.057392 0.001020 0.000000 0.018750 0.066667 0.057392 0.001530 0.000000 0.018750 0.088889 0.057392 0.002041 0.000000 0.018750 0.111111 0.057392 0.002551 0.000000 0.018750 0.133333 0.057392 0.003061 0.000000 0.018750 0.155556 0.057392 0.003571 0.000000 0.018750 0.177778 0.057392 0.004081 0.000000 0.018750 0.200000 0.057392 0.004591 0.000000 0.018750 0.222222 0.057392 0.005102 0.000000 0.018750 0.244444 0.057392 0.005612 0.000000 0.018750 0.266667 0.057392 0.006122 0.000000 0.018750 0.288889 0.057392 0.006632 0.000000 0.018750 0.311111 0.057392 0.007142 0.000000 0.018750 0.333333 0.057392 0.007652 0.000000 0.018750 0.355556 0.057392 0.008162 0.000000 0.018750 0.377778 0.057392 0.008673 0.000000 0.018750 0.400000 0.057392 0.009183 0.000000 0.018750 0.422222 0.057392 0.009693 0.000000 0.018750 0.444444 0.057392 0.010203 0.000000 0.018750 0.466667 0.057392 0.010713 0.000000 0.018750 0.488889 0.057392 0.011223 0.000000 0.018750 0.511111 0.057392 0.011733 0.000000 0.018750 0.533333 0.057392 0.012244 0.000000 0.018750 0.555556 0.057392 0.012754 0.000000 0.018750 0.577778 0.057392 0.013264 0.000000 0.018750 0.600000 0.057392 0.013774 0.000000 0.018750 0.622222 0.057392 0.014284 0.000000 0.018750 Dulay All TDAs 4-30-2025 4/30/2025 11:42:37 AM Page 42 0.644444 0.057392 0.014794 0.000000 0.018750 0.666667 0.057392 0.015305 0.000000 0.018750 0.688889 0.057392 0.015815 0.000000 0.018750 0.711111 0.057392 0.016325 0.000000 0.018750 0.733333 0.057392 0.016835 0.000000 0.018750 0.755556 0.057392 0.017345 0.000000 0.018750 0.777778 0.057392 0.017855 0.000000 0.018750 0.800000 0.057392 0.018365 0.000000 0.018750 0.822222 0.057392 0.018876 0.000000 0.018750 0.844444 0.057392 0.019386 0.000000 0.018750 0.866667 0.057392 0.019896 0.000000 0.018750 0.888889 0.057392 0.020406 0.000000 0.018750 0.911111 0.057392 0.020916 0.000000 0.018750 0.933333 0.057392 0.021426 0.000000 0.018750 0.955556 0.057392 0.021937 0.000000 0.018750 0.977778 0.057392 0.022447 0.000000 0.018750 1.000000 0.057392 0.022957 0.000000 0.018750 1.022222 0.057392 0.023467 0.000000 0.018750 1.044444 0.057392 0.023977 0.000000 0.018750 1.066667 0.057392 0.024487 0.000000 0.018750 1.088889 0.057392 0.024997 0.000000 0.018750 1.111111 0.057392 0.025508 0.000000 0.018750 1.133333 0.057392 0.026018 0.000000 0.018750 1.155556 0.057392 0.026528 0.000000 0.018750 1.177778 0.057392 0.027038 0.000000 0.018750 1.200000 0.057392 0.027548 0.000000 0.018750 1.222222 0.057392 0.028058 0.000000 0.018750 1.244444 0.057392 0.028569 0.000000 0.018750 1.266667 0.057392 0.029079 0.000000 0.018750 1.288889 0.057392 0.029589 0.000000 0.018750 1.311111 0.057392 0.030099 0.000000 0.018750 1.333333 0.057392 0.030609 0.000000 0.018750 1.355556 0.057392 0.031119 0.000000 0.018750 1.377778 0.057392 0.031629 0.000000 0.018750 1.400000 0.057392 0.032140 0.000000 0.018750 1.422222 0.057392 0.032650 0.000000 0.018750 1.444444 0.057392 0.033160 0.000000 0.018750 1.466667 0.057392 0.033670 0.000000 0.018750 1.488889 0.057392 0.034180 0.000000 0.018750 1.511111 0.057392 0.034690 0.000000 0.018750 1.533333 0.057392 0.035200 0.000000 0.018750 1.555556 0.057392 0.035711 0.000000 0.018750 1.577778 0.057392 0.036221 0.000000 0.018750 1.600000 0.057392 0.036731 0.000000 0.018750 1.622222 0.057392 0.037241 0.000000 0.018750 1.644444 0.057392 0.037751 0.000000 0.018750 1.666667 0.057392 0.038261 0.000000 0.018750 1.688889 0.057392 0.038772 0.000000 0.018750 1.711111 0.057392 0.039282 0.000000 0.018750 1.733333 0.057392 0.039792 0.000000 0.018750 1.755556 0.057392 0.040302 0.000000 0.018750 1.777778 0.057392 0.040812 0.000000 0.018750 1.800000 0.057392 0.041322 0.000000 0.018750 1.822222 0.057392 0.041832 0.000000 0.018750 1.844444 0.057392 0.042343 0.000000 0.018750 1.866667 0.057392 0.042853 0.000000 0.018750 1.888889 0.057392 0.043363 0.000000 0.018750 1.911111 0.057392 0.043873 0.000000 0.018750 1.933333 0.057392 0.044383 0.000000 0.018750 1.955556 0.057392 0.044893 0.000000 0.018750 1.977778 0.057392 0.045404 0.000000 0.018750 2.000000 0.057392 0.045914 0.000000 0.018750 2.022222 0.057392 0.047189 0.000000 0.018750 END FTABLE 2 FTABLE 3 90 5 Depth Area Volume Outflow1 Outflow2 Velocity Travel Time*** (ft) (acres) (acre-ft) (cfs) (cfs) (ft/sec) (Minutes)*** 0.000000 0.165748 0.000000 0.000000 0.000000 0.018511 0.165748 0.001227 0.000000 0.054150 Dulay All TDAs 4-30-2025 4/30/2025 11:42:37 AM Page 43 0.037022 0.165748 0.002455 0.000000 0.054150 0.055533 0.165748 0.003682 0.000000 0.054150 0.074044 0.165748 0.004909 0.000000 0.054150 0.092556 0.165748 0.006136 0.000000 0.054150 0.111067 0.165748 0.007364 0.000000 0.054150 0.129578 0.165748 0.008591 0.000000 0.054150 0.148089 0.165748 0.009818 0.000000 0.054150 0.166600 0.165748 0.011045 0.000000 0.054150 0.185111 0.165748 0.012273 0.000000 0.054150 0.203622 0.165748 0.013500 0.000000 0.054150 0.222133 0.165748 0.014727 0.000000 0.054150 0.240644 0.165748 0.015955 0.000000 0.054150 0.259156 0.165748 0.017182 0.000000 0.054150 0.277667 0.165748 0.018409 0.000000 0.054150 0.296178 0.165748 0.019636 0.000000 0.054150 0.314689 0.165748 0.020864 0.000000 0.054150 0.333200 0.165748 0.022091 0.000000 0.054150 0.351711 0.165748 0.023318 0.000000 0.054150 0.370222 0.165748 0.024545 0.000000 0.054150 0.388733 0.165748 0.025773 0.000000 0.054150 0.407244 0.165748 0.027000 0.000000 0.054150 0.425756 0.165748 0.028227 0.000000 0.054150 0.444267 0.165748 0.029455 0.000000 0.054150 0.462778 0.165748 0.030682 0.000000 0.054150 0.481289 0.165748 0.031909 0.000000 0.054150 0.499800 0.165748 0.033136 0.000000 0.054150 0.518311 0.165748 0.034364 0.000000 0.054150 0.536822 0.165748 0.035591 0.000000 0.054150 0.555333 0.165748 0.036818 0.000000 0.054150 0.573844 0.165748 0.038046 0.000000 0.054150 0.592356 0.165748 0.039273 0.000000 0.054150 0.610867 0.165748 0.040500 0.000000 0.054150 0.629378 0.165748 0.041727 0.000000 0.054150 0.647889 0.165748 0.042955 0.000000 0.054150 0.666400 0.165748 0.044182 0.000000 0.054150 0.684911 0.165748 0.045409 0.000000 0.054150 0.703422 0.165748 0.046636 0.000000 0.054150 0.721933 0.165748 0.047864 0.000000 0.054150 0.740444 0.165748 0.049091 0.000000 0.054150 0.758956 0.165748 0.050318 0.000000 0.054150 0.777467 0.165748 0.051546 0.000000 0.054150 0.795978 0.165748 0.052773 0.000000 0.054150 0.814489 0.165748 0.054000 0.000000 0.054150 0.833000 0.165748 0.055227 0.000000 0.054150 0.851511 0.165748 0.056455 0.000000 0.054150 0.870022 0.165748 0.057682 0.000000 0.054150 0.888533 0.165748 0.058909 0.000000 0.054150 0.907044 0.165748 0.060136 0.000000 0.054150 0.925556 0.165748 0.061364 0.000000 0.054150 0.944067 0.165748 0.062591 0.000000 0.054150 0.962578 0.165748 0.063818 0.000000 0.054150 0.981089 0.165748 0.065046 0.000000 0.054150 0.999600 0.165748 0.066273 0.000000 0.054150 1.018111 0.165748 0.067163 0.000000 0.054150 1.036622 0.165748 0.068052 0.000000 0.054150 1.055133 0.165748 0.068942 0.000000 0.054150 1.073644 0.165748 0.069832 0.000000 0.054150 1.092156 0.165748 0.070722 0.000000 0.054150 1.110667 0.165748 0.071611 0.000000 0.054150 1.129178 0.165748 0.072501 0.000000 0.054150 1.147689 0.165748 0.073391 0.000000 0.054150 1.166200 0.165748 0.074281 0.000000 0.054150 1.184711 0.165748 0.075171 0.000000 0.054150 1.203222 0.165748 0.076060 0.000000 0.054150 1.221733 0.165748 0.076950 0.000000 0.054150 1.240244 0.165748 0.077840 0.000000 0.054150 1.258756 0.165748 0.078730 0.000000 0.054150 1.277267 0.165748 0.079619 0.000000 0.054150 1.295778 0.165748 0.080509 0.000000 0.054150 1.314289 0.165748 0.081399 0.000000 0.054150 Dulay All TDAs 4-30-2025 4/30/2025 11:42:37 AM Page 44 1.332800 0.165748 0.082289 0.000000 0.054150 1.351311 0.165748 0.083179 0.000000 0.054150 1.369822 0.165748 0.084068 0.000000 0.054150 1.388333 0.165748 0.084958 0.000000 0.054150 1.406844 0.165748 0.085848 0.000000 0.054150 1.425356 0.165748 0.086738 0.000000 0.054150 1.443867 0.165748 0.087627 0.000000 0.054150 1.462378 0.165748 0.088517 0.000000 0.054150 1.480889 0.165748 0.089407 0.000000 0.054150 1.499400 0.165748 0.090297 0.000000 0.054150 1.517911 0.165748 0.091187 0.000000 0.054150 1.536422 0.165748 0.092076 0.000000 0.054150 1.554933 0.165748 0.092966 0.000000 0.054150 1.573444 0.165748 0.093856 0.000000 0.054150 1.591956 0.165748 0.094746 0.000000 0.054150 1.610467 0.165748 0.095635 0.000000 0.054150 1.628978 0.165748 0.096525 0.000000 0.054150 1.647489 0.165748 0.097415 0.000000 0.054150 END FTABLE 3 FTABLE 1 90 5 Depth Area Volume Outflow1 Outflow2 Velocity Travel Time*** (ft) (acres) (acre-ft) (cfs) (cfs) (ft/sec) (Minutes)*** 0.000000 0.075230 0.000000 0.000000 0.000000 0.018511 0.075230 0.000557 0.000000 0.024578 0.037022 0.075230 0.001114 0.000000 0.024578 0.055533 0.075230 0.001671 0.000000 0.024578 0.074044 0.075230 0.002228 0.000000 0.024578 0.092556 0.075230 0.002785 0.000000 0.024578 0.111067 0.075230 0.003342 0.000000 0.024578 0.129578 0.075230 0.003899 0.000000 0.024578 0.148089 0.075230 0.004456 0.000000 0.024578 0.166600 0.075230 0.005013 0.000000 0.024578 0.185111 0.075230 0.005570 0.000000 0.024578 0.203622 0.075230 0.006127 0.000000 0.024578 0.222133 0.075230 0.006684 0.000000 0.024578 0.240644 0.075230 0.007241 0.000000 0.024578 0.259156 0.075230 0.007798 0.000000 0.024578 0.277667 0.075230 0.008355 0.000000 0.024578 0.296178 0.075230 0.008913 0.000000 0.024578 0.314689 0.075230 0.009470 0.000000 0.024578 0.333200 0.075230 0.010027 0.000000 0.024578 0.351711 0.075230 0.010584 0.000000 0.024578 0.370222 0.075230 0.011141 0.000000 0.024578 0.388733 0.075230 0.011698 0.000000 0.024578 0.407244 0.075230 0.012255 0.000000 0.024578 0.425756 0.075230 0.012812 0.000000 0.024578 0.444267 0.075230 0.013369 0.000000 0.024578 0.462778 0.075230 0.013926 0.000000 0.024578 0.481289 0.075230 0.014483 0.000000 0.024578 0.499800 0.075230 0.015040 0.000000 0.024578 0.518311 0.075230 0.015597 0.000000 0.024578 0.536822 0.075230 0.016154 0.000000 0.024578 0.555333 0.075230 0.016711 0.000000 0.024578 0.573844 0.075230 0.017268 0.000000 0.024578 0.592356 0.075230 0.017825 0.000000 0.024578 0.610867 0.075230 0.018382 0.000000 0.024578 0.629378 0.075230 0.018939 0.000000 0.024578 0.647889 0.075230 0.019496 0.000000 0.024578 0.666400 0.075230 0.020053 0.000000 0.024578 0.684911 0.075230 0.020610 0.000000 0.024578 0.703422 0.075230 0.021167 0.000000 0.024578 0.721933 0.075230 0.021724 0.000000 0.024578 0.740444 0.075230 0.022281 0.000000 0.024578 0.758956 0.075230 0.022838 0.000000 0.024578 0.777467 0.075230 0.023395 0.000000 0.024578 0.795978 0.075230 0.023952 0.000000 0.024578 0.814489 0.075230 0.024509 0.000000 0.024578 0.833000 0.075230 0.025066 0.000000 0.024578 0.851511 0.075230 0.025624 0.000000 0.024578 Dulay All TDAs 4-30-2025 4/30/2025 11:42:37 AM Page 45 0.870022 0.075230 0.026181 0.000000 0.024578 0.888533 0.075230 0.026738 0.000000 0.024578 0.907044 0.075230 0.027295 0.000000 0.024578 0.925556 0.075230 0.027852 0.000000 0.024578 0.944067 0.075230 0.028409 0.000000 0.024578 0.962578 0.075230 0.028966 0.000000 0.024578 0.981089 0.075230 0.029523 0.000000 0.024578 0.999600 0.075230 0.030080 0.000000 0.024578 1.018111 0.075230 0.030484 0.000000 0.024578 1.036622 0.075230 0.030887 0.000000 0.024578 1.055133 0.075230 0.031291 0.000000 0.024578 1.073644 0.075230 0.031695 0.000000 0.024578 1.092156 0.075230 0.032099 0.000000 0.024578 1.110667 0.075230 0.032503 0.000000 0.024578 1.129178 0.075230 0.032907 0.000000 0.024578 1.147689 0.075230 0.033311 0.000000 0.024578 1.166200 0.075230 0.033714 0.000000 0.024578 1.184711 0.075230 0.034118 0.000000 0.024578 1.203222 0.075230 0.034522 0.000000 0.024578 1.221733 0.075230 0.034926 0.000000 0.024578 1.240244 0.075230 0.035330 0.000000 0.024578 1.258756 0.075230 0.035734 0.000000 0.024578 1.277267 0.075230 0.036138 0.000000 0.024578 1.295778 0.075230 0.036541 0.000000 0.024578 1.314289 0.075230 0.036945 0.000000 0.024578 1.332800 0.075230 0.037349 0.000000 0.024578 1.351311 0.075230 0.037753 0.000000 0.024578 1.369822 0.075230 0.038157 0.000000 0.024578 1.388333 0.075230 0.038561 0.000000 0.024578 1.406844 0.075230 0.038964 0.000000 0.024578 1.425356 0.075230 0.039368 0.000000 0.024578 1.443867 0.075230 0.039772 0.000000 0.024578 1.462378 0.075230 0.040176 0.000000 0.024578 1.480889 0.075230 0.040580 0.000000 0.024578 1.499400 0.075230 0.040984 0.000000 0.024578 1.517911 0.075230 0.041388 0.000000 0.024578 1.536422 0.075230 0.041791 0.000000 0.024578 1.554933 0.075230 0.042195 0.000000 0.024578 1.573444 0.075230 0.042599 0.000000 0.024578 1.591956 0.075230 0.043003 0.000000 0.024578 1.610467 0.075230 0.043407 0.000000 0.024578 1.628978 0.075230 0.043811 0.000000 0.024578 1.647489 0.075230 0.044215 0.000000 0.024578 END FTABLE 1 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 WDM 1 EVAP ENGL 0.76 RCHRES 1 EXTNL POTEV WDM 1 EVAP ENGL 0.76 RCHRES 3 EXTNL POTEV END EXT SOURCES EXT TARGETS <-Volume-> <-Grp> <-Member-><--Mult-->Tran <-Volume-> <Member> Tsys Tgap Amd *** <Name> # <Name> # #<-factor->strg <Name> # <Name> tem strg strg*** RCHRES 2 HYDR RO 1 1 1 WDM 1000 FLOW ENGL REPL RCHRES 2 HYDR O 1 1 1 WDM 1001 FLOW ENGL REPL RCHRES 2 HYDR O 2 1 1 WDM 1002 FLOW ENGL REPL RCHRES 2 HYDR STAGE 1 1 1 WDM 1003 STAG ENGL REPL 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 601 OUTPUT MEAN 1 1 48.4 WDM 901 FLOW ENGL REPL RCHRES 3 HYDR RO 1 1 1 WDM 1004 FLOW ENGL REPL RCHRES 3 HYDR O 1 1 1 WDM 1005 FLOW ENGL REPL Dulay All TDAs 4-30-2025 4/30/2025 11:42:37 AM Page 46 RCHRES 3 HYDR O 2 1 1 WDM 1006 FLOW ENGL REPL RCHRES 3 HYDR STAGE 1 1 1 WDM 1007 STAG ENGL REPL RCHRES 1 HYDR RO 1 1 1 WDM 1008 FLOW ENGL REPL RCHRES 1 HYDR O 1 1 1 WDM 1009 FLOW ENGL REPL RCHRES 1 HYDR O 2 1 1 WDM 1010 FLOW ENGL REPL RCHRES 1 HYDR STAGE 1 1 1 WDM 1011 STAG ENGL REPL END EXT TARGETS MASS-LINK <Volume> <-Grp> <-Member-><--Mult--> <Target> <-Grp> <-Member->*** <Name> <Name> # #<-factor-> <Name> <Name> # #*** MASS-LINK 5 IMPLND IWATER SURO 0.083333 RCHRES INFLOW IVOL END MASS-LINK 5 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 MASS-LINK 17 RCHRES OFLOW OVOL 1 COPY INPUT MEAN END MASS-LINK 17 MASS-LINK 54 PERLND PWATER SURO IMPLND EXTNL SURLI END MASS-LINK 54 END MASS-LINK END RUN Dulay All TDAs 4-30-2025 4/30/2025 11:42:37 AM Page 47 Predeveloped HSPF Message File Dulay All TDAs 4-30-2025 4/30/2025 11:42:37 AM Page 48 Mitigated HSPF Message File Dulay All TDAs 4-30-2025 4/30/2025 11:42:37 AM Page 49 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 WWHM2012 PROJECT REPORT WWHM Report for TDA #1 Unchanged Surface Condition Surface Flow to West 4-29-2025 Figure D2 Dulay TDA #1 4/29/2025 2:40:06 PM Page 2 General Model Information WWHM2012 Project Name:Dulay TDA #1 Site Name:Dulay TDA #1 Site Address:18855 102nd Ave se City:Renton Report Date:4/29/2025 Gage:Seatac Data Start:1948/10/01 Data End:2009/09/30 Timestep:15 Minute Precip Scale:1.000 Version Date:2024/10/15 Version:4.3.1 POC Thresholds Low Flow Threshold for POC1:50 Percent of the 2 Year High Flow Threshold for POC1:50 Year Dulay TDA #1 4/29/2025 2:40:06 PM Page 3 Landuse Basin Data Predeveloped Land Use Existing TDA #1 Bypass:No GroundWater:No Pervious Land Use acre C, Forest, Mod 0.35 Pervious Total 0.35 Impervious Land Use acre Impervious Total 0 Basin Total 0.35 Element Flow Componants: Surface Interflow Groundwater Componant Flows To: POC 1 POC 1 Dulay TDA #1 4/29/2025 2:40:06 PM Page 4 Mitigated Land Use Developed - TDA #1 Bypass:No GroundWater:No Pervious Land Use acre C, Forest, Mod 0.35 Pervious Total 0.35 Impervious Land Use acre Impervious Total 0 Basin Total 0.35 Element Flow Componants: Surface Interflow Groundwater Componant Flows To: POC 1 POC 1 Dulay TDA #1 4/29/2025 2:40:06 PM Page 5 Routing Elements Predeveloped Routing Dulay TDA #1 4/29/2025 2:40:06 PM Page 6 Mitigated Routing Dulay TDA #1 4/29/2025 2:40:06 PM Page 7 Analysis Results POC 1 + Predeveloped x Mitigated Predeveloped Landuse Totals for POC #1 Total Pervious Area:0.35 Total Impervious Area:0 Mitigated Landuse Totals for POC #1 Total Pervious Area:0.35 Total Impervious Area:0 Flow Frequency Method:Log Pearson Type III 17B Flow Frequency Return Periods for Predeveloped. POC #1 Return Period Flow(cfs) 2 year 0.010421 5 year 0.017076 10 year 0.021355 25 year 0.026445 50 year 0.029971 100 year 0.033264 Flow Frequency Return Periods for Mitigated. POC #1 Return Period Flow(cfs) 2 year 0.010421 5 year 0.017076 10 year 0.021355 25 year 0.026445 50 year 0.029971 100 year 0.033264 Annual Peaks Annual Peaks for Predeveloped and Mitigated. POC #1 Year Predeveloped Mitigated 1949 0.012 0.012 1950 0.014 0.014 1951 0.023 0.023 1952 0.007 0.007 1953 0.006 0.006 1954 0.009 0.009 1955 0.014 0.014 1956 0.011 0.011 1957 0.009 0.009 1958 0.010 0.010 Dulay TDA #1 4/29/2025 2:40:24 PM Page 8 1959 0.009 0.009 1960 0.016 0.016 1961 0.009 0.009 1962 0.005 0.005 1963 0.007 0.007 1964 0.010 0.010 1965 0.007 0.007 1966 0.007 0.007 1967 0.016 0.016 1968 0.009 0.009 1969 0.009 0.009 1970 0.007 0.007 1971 0.008 0.008 1972 0.017 0.017 1973 0.008 0.008 1974 0.008 0.008 1975 0.012 0.012 1976 0.008 0.008 1977 0.001 0.001 1978 0.007 0.007 1979 0.004 0.004 1980 0.020 0.020 1981 0.006 0.006 1982 0.013 0.013 1983 0.011 0.011 1984 0.007 0.007 1985 0.004 0.004 1986 0.018 0.018 1987 0.016 0.016 1988 0.006 0.006 1989 0.004 0.004 1990 0.038 0.038 1991 0.020 0.020 1992 0.008 0.008 1993 0.008 0.008 1994 0.003 0.003 1995 0.011 0.011 1996 0.026 0.026 1997 0.020 0.020 1998 0.005 0.005 1999 0.022 0.022 2000 0.008 0.008 2001 0.001 0.001 2002 0.009 0.009 2003 0.014 0.014 2004 0.015 0.015 2005 0.011 0.011 2006 0.012 0.012 2007 0.029 0.029 2008 0.035 0.035 2009 0.016 0.016 Ranked Annual Peaks Ranked Annual Peaks for Predeveloped and Mitigated. POC #1 Rank Predeveloped Mitigated 1 0.0377 0.0377 2 0.0348 0.0348 3 0.0285 0.0285 Dulay TDA #1 4/29/2025 2:40:24 PM Page 9 4 0.0264 0.0264 5 0.0228 0.0228 6 0.0224 0.0224 7 0.0204 0.0204 8 0.0203 0.0203 9 0.0200 0.0200 10 0.0179 0.0179 11 0.0173 0.0173 12 0.0162 0.0162 13 0.0160 0.0160 14 0.0158 0.0158 15 0.0157 0.0157 16 0.0147 0.0147 17 0.0142 0.0142 18 0.0142 0.0142 19 0.0138 0.0138 20 0.0132 0.0132 21 0.0123 0.0123 22 0.0120 0.0120 23 0.0118 0.0118 24 0.0114 0.0114 25 0.0114 0.0114 26 0.0113 0.0113 27 0.0109 0.0109 28 0.0105 0.0105 29 0.0102 0.0102 30 0.0092 0.0092 31 0.0092 0.0092 32 0.0090 0.0090 33 0.0089 0.0089 34 0.0088 0.0088 35 0.0088 0.0088 36 0.0086 0.0086 37 0.0085 0.0085 38 0.0084 0.0084 39 0.0082 0.0082 40 0.0080 0.0080 41 0.0079 0.0079 42 0.0079 0.0079 43 0.0077 0.0077 44 0.0074 0.0074 45 0.0071 0.0071 46 0.0071 0.0071 47 0.0070 0.0070 48 0.0070 0.0070 49 0.0068 0.0068 50 0.0067 0.0067 51 0.0064 0.0064 52 0.0062 0.0062 53 0.0058 0.0058 54 0.0054 0.0054 55 0.0050 0.0050 56 0.0043 0.0043 57 0.0041 0.0041 58 0.0040 0.0040 59 0.0027 0.0027 60 0.0014 0.0014 61 0.0012 0.0012 Dulay TDA #1 4/29/2025 2:40:24 PM Page 10 Dulay TDA #1 4/29/2025 2:40:24 PM Page 11 Duration Flows The Facility PASSED Flow(cfs)Predev Mit Percentage Pass/Fail 0.0052 17079 17079 100 Pass 0.0055 15488 15488 100 Pass 0.0057 14070 14070 100 Pass 0.0060 12799 12799 100 Pass 0.0062 11569 11569 100 Pass 0.0065 10515 10515 100 Pass 0.0067 9561 9561 100 Pass 0.0070 8750 8750 100 Pass 0.0072 8031 8031 100 Pass 0.0075 7347 7347 100 Pass 0.0077 6733 6733 100 Pass 0.0080 6190 6190 100 Pass 0.0082 5728 5728 100 Pass 0.0085 5309 5309 100 Pass 0.0087 4924 4924 100 Pass 0.0090 4569 4569 100 Pass 0.0092 4235 4235 100 Pass 0.0095 3951 3951 100 Pass 0.0097 3643 3643 100 Pass 0.0100 3388 3388 100 Pass 0.0102 3133 3133 100 Pass 0.0105 2917 2917 100 Pass 0.0107 2706 2706 100 Pass 0.0110 2490 2490 100 Pass 0.0112 2316 2316 100 Pass 0.0115 2136 2136 100 Pass 0.0117 1973 1973 100 Pass 0.0120 1826 1826 100 Pass 0.0122 1704 1704 100 Pass 0.0125 1578 1578 100 Pass 0.0127 1443 1443 100 Pass 0.0130 1326 1326 100 Pass 0.0132 1233 1233 100 Pass 0.0135 1148 1148 100 Pass 0.0137 1086 1086 100 Pass 0.0140 1020 1020 100 Pass 0.0142 948 948 100 Pass 0.0145 887 887 100 Pass 0.0147 825 825 100 Pass 0.0150 761 761 100 Pass 0.0152 725 725 100 Pass 0.0155 675 675 100 Pass 0.0157 623 623 100 Pass 0.0160 589 589 100 Pass 0.0162 549 549 100 Pass 0.0165 506 506 100 Pass 0.0167 469 469 100 Pass 0.0170 428 428 100 Pass 0.0172 388 388 100 Pass 0.0175 356 356 100 Pass 0.0177 328 328 100 Pass 0.0180 298 298 100 Pass 0.0182 270 270 100 Pass Dulay TDA #1 4/29/2025 2:40:24 PM Page 12 0.0185 242 242 100 Pass 0.0187 218 218 100 Pass 0.0190 198 198 100 Pass 0.0192 175 175 100 Pass 0.0195 152 152 100 Pass 0.0197 130 130 100 Pass 0.0200 119 119 100 Pass 0.0202 104 104 100 Pass 0.0205 95 95 100 Pass 0.0207 84 84 100 Pass 0.0210 74 74 100 Pass 0.0212 69 69 100 Pass 0.0215 61 61 100 Pass 0.0217 53 53 100 Pass 0.0220 46 46 100 Pass 0.0222 39 39 100 Pass 0.0225 30 30 100 Pass 0.0227 25 25 100 Pass 0.0230 22 22 100 Pass 0.0232 20 20 100 Pass 0.0235 17 17 100 Pass 0.0237 14 14 100 Pass 0.0240 12 12 100 Pass 0.0242 8 8 100 Pass 0.0245 7 7 100 Pass 0.0247 7 7 100 Pass 0.0250 7 7 100 Pass 0.0252 6 6 100 Pass 0.0255 6 6 100 Pass 0.0257 6 6 100 Pass 0.0260 6 6 100 Pass 0.0262 6 6 100 Pass 0.0265 5 5 100 Pass 0.0267 5 5 100 Pass 0.0270 5 5 100 Pass 0.0272 5 5 100 Pass 0.0275 5 5 100 Pass 0.0277 5 5 100 Pass 0.0280 5 5 100 Pass 0.0282 4 4 100 Pass 0.0285 4 4 100 Pass 0.0287 3 3 100 Pass 0.0290 3 3 100 Pass 0.0292 3 3 100 Pass 0.0295 3 3 100 Pass 0.0297 3 3 100 Pass 0.0300 3 3 100 Pass Dulay TDA #1 4/29/2025 2:40:24 PM Page 13 Water Quality Water Quality BMP Flow and Volume for POC #1 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. Dulay TDA #1 4/29/2025 2:40:24 PM Page 14 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. Dulay TDA #1 4/29/2025 2:40:25 PM Page 15 Appendix Predeveloped Schematic Dulay TDA #1 4/29/2025 2:40:25 PM Page 16 Mitigated Schematic Dulay TDA #1 4/29/2025 2:40:25 PM Page 17 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 Dulay TDA #1.wdm MESSU 25 PreDulay TDA #1.MES 27 PreDulay TDA #1.L61 28 PreDulay TDA #1.L62 30 POCDulay TDA #11.dat END FILES OPN SEQUENCE INGRP INDELT 00:15 PERLND 11 COPY 501 DISPLY 1 END INGRP END OPN SEQUENCE DISPLY DISPLY-INFO1 # - #<----------Title----------->***TRAN PIVL DIG1 FIL1 PYR DIG2 FIL2 YRND 1 Existing TDA #1 MAX 1 2 30 9 END DISPLY-INFO1 END DISPLY COPY TIMESERIES # - # NPT NMN *** 1 1 1 501 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 *** 11 C, Forest, 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 *** 11 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 ********* 11 0 0 4 0 0 0 0 0 0 0 0 0 1 9 END PRINT-INFO Dulay TDA #1 4/29/2025 2:40:25 PM Page 18 PWAT-PARM1 <PLS > PWATER variable monthly parameter value flags *** # - # CSNO RTOP UZFG VCS VUZ VNN VIFW VIRC VLE INFC HWT *** 11 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 11 0 4.5 0.08 400 0.1 0.5 0.996 END PWAT-PARM2 PWAT-PARM3 <PLS > PWATER input info: Part 3 *** # - # ***PETMAX PETMIN INFEXP INFILD DEEPFR BASETP AGWETP 11 0 0 2 2 0 0 0 END PWAT-PARM3 PWAT-PARM4 <PLS > PWATER input info: Part 4 *** # - # CEPSC UZSN NSUR INTFW IRC LZETP *** 11 0.2 0.5 0.35 6 0.5 0.7 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 11 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 *** END GEN-INFO *** Section IWATER*** ACTIVITY <PLS > ************* Active Sections ***************************** # - # ATMP SNOW IWAT SLD IWG IQAL *** END ACTIVITY PRINT-INFO <ILS > ******** Print-flags ******** PIVL PYR # - # ATMP SNOW IWAT SLD IWG IQAL ********* END PRINT-INFO IWAT-PARM1 <PLS > IWATER variable monthly parameter value flags *** # - # CSNO RTOP VRS VNN RTLI *** END IWAT-PARM1 IWAT-PARM2 <PLS > IWATER input info: Part 2 *** # - # *** LSUR SLSUR NSUR RETSC END IWAT-PARM2 IWAT-PARM3 <PLS > IWATER input info: Part 3 *** # - # ***PETMAX PETMIN END IWAT-PARM3 IWAT-STATE1 <PLS > *** Initial conditions at start of simulation # - # *** RETS SURS END IWAT-STATE1 Dulay TDA #1 4/29/2025 2:40:25 PM Page 19 END IMPLND SCHEMATIC <-Source-> <--Area--> <-Target-> MBLK *** <Name> # <-factor-> <Name> # Tbl# *** Existing TDA #1 *** PERLND 11 0.35 COPY 501 12 PERLND 11 0.35 COPY 501 13 ******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 <-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 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 Dulay TDA #1 4/29/2025 2:40:25 PM Page 20 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 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 END MASS-LINK END RUN Dulay TDA #1 4/29/2025 2:40:25 PM Page 21 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 Dulay TDA #1.wdm MESSU 25 MitDulay TDA #1.MES 27 MitDulay TDA #1.L61 28 MitDulay TDA #1.L62 30 POCDulay TDA #11.dat END FILES OPN SEQUENCE INGRP INDELT 00:15 PERLND 11 COPY 501 DISPLY 1 END INGRP END OPN SEQUENCE DISPLY DISPLY-INFO1 # - #<----------Title----------->***TRAN PIVL DIG1 FIL1 PYR DIG2 FIL2 YRND 1 Developed - TDA #1 MAX 1 2 30 9 END DISPLY-INFO1 END DISPLY COPY TIMESERIES # - # NPT NMN *** 1 1 1 501 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 *** 11 C, Forest, 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 *** 11 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 ********* 11 0 0 4 0 0 0 0 0 0 0 0 0 1 9 END PRINT-INFO Dulay TDA #1 4/29/2025 2:40:25 PM Page 22 PWAT-PARM1 <PLS > PWATER variable monthly parameter value flags *** # - # CSNO RTOP UZFG VCS VUZ VNN VIFW VIRC VLE INFC HWT *** 11 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 11 0 4.5 0.08 400 0.1 0.5 0.996 END PWAT-PARM2 PWAT-PARM3 <PLS > PWATER input info: Part 3 *** # - # ***PETMAX PETMIN INFEXP INFILD DEEPFR BASETP AGWETP 11 0 0 2 2 0 0 0 END PWAT-PARM3 PWAT-PARM4 <PLS > PWATER input info: Part 4 *** # - # CEPSC UZSN NSUR INTFW IRC LZETP *** 11 0.2 0.5 0.35 6 0.5 0.7 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 11 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 *** END GEN-INFO *** Section IWATER*** ACTIVITY <PLS > ************* Active Sections ***************************** # - # ATMP SNOW IWAT SLD IWG IQAL *** END ACTIVITY PRINT-INFO <ILS > ******** Print-flags ******** PIVL PYR # - # ATMP SNOW IWAT SLD IWG IQAL ********* END PRINT-INFO IWAT-PARM1 <PLS > IWATER variable monthly parameter value flags *** # - # CSNO RTOP VRS VNN RTLI *** END IWAT-PARM1 IWAT-PARM2 <PLS > IWATER input info: Part 2 *** # - # *** LSUR SLSUR NSUR RETSC END IWAT-PARM2 IWAT-PARM3 <PLS > IWATER input info: Part 3 *** # - # ***PETMAX PETMIN END IWAT-PARM3 IWAT-STATE1 <PLS > *** Initial conditions at start of simulation # - # *** RETS SURS END IWAT-STATE1 Dulay TDA #1 4/29/2025 2:40:25 PM Page 23 END IMPLND SCHEMATIC <-Source-> <--Area--> <-Target-> MBLK *** <Name> # <-factor-> <Name> # Tbl# *** Developed - TDA #1 *** PERLND 11 0.35 COPY 501 12 PERLND 11 0.35 COPY 501 13 ******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 <-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 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 Dulay TDA #1 4/29/2025 2:40:25 PM Page 24 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 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 END MASS-LINK END RUN Dulay TDA #1 4/29/2025 2:40:25 PM Page 25 Predeveloped HSPF Message File Dulay TDA #1 4/29/2025 2:40:25 PM Page 26 Mitigated HSPF Message File Dulay TDA #1 4/29/2025 2:40:25 PM Page 27 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 WWHM2012 PROJECT REPORT WWHM Report for TDA #2 On-site Developed Areas 4-29-2025 Figure D3 Dulay TDA #2 4/29/2025 2:54:28 PM Page 2 General Model Information WWHM2012 Project Name:Dulay TDA #2 Site Name:Dulay TDA #2 Site Address:18855 102nd Ave se City:Renton Report Date:4/29/2025 Gage:Seatac Data Start:1948/10/01 Data End:2009/09/30 Timestep:15 Minute Precip Scale:1.000 Version Date:2024/10/15 Version:4.3.1 POC Thresholds Low Flow Threshold for POC1:50 Percent of the 2 Year High Flow Threshold for POC1:50 Year Dulay TDA #2 4/29/2025 2:54:28 PM Page 3 Landuse Basin Data Predeveloped Land Use Existing TDA #2 Bypass:No GroundWater:No Pervious Land Use acre C, Forest, Mod 0.827 Pervious Total 0.827 Impervious Land Use acre Impervious Total 0 Basin Total 0.827 Element Flow Componants: Surface Interflow Groundwater Componant Flows To: POC 1 POC 1 Dulay TDA #2 4/29/2025 2:54:28 PM Page 4 Mitigated Land Use Roof Areas - TDA #2 Bypass:No GroundWater:No Pervious Land Use acre Pervious Total 0 Impervious Land Use acre ROOF TOPS FLAT 0.1837 Impervious Total 0.1837 Basin Total 0.1837 Element Flow Componants: Surface Interflow Groundwater Componant Flows To: Gravel Trench Bed 1 Gravel Trench Bed 1 Dulay TDA #2 4/29/2025 2:54:28 PM Page 5 Lateral Basin - A/B, Lawn, Flat TDA #2 Bypass:No GroundWater:No Pervious Land Use acre A B, Lawn, Flat .402 Element Flow Componants: Surface Interflow Groundwater Componant Flows To: Permeable Pavement PVT Road TDA #2 Dulay TDA #2 4/29/2025 2:54:28 PM Page 6 Routing Elements Predeveloped Routing Dulay TDA #2 4/29/2025 2:54:28 PM Page 7 Mitigated Routing Gravel Trench Bed 1 Bottom Length:100.00 ft. Bottom Width:25.00 ft. Trench bottom slope 1:0 To 1 Trench Left side slope 0:0 To 1 Trench right side slope 2:0 To 1 Material thickness of first layer:2 Pour Space of material for first layer:0.4 Material thickness of second layer:0 Pour Space of material for second layer:0 Material thickness of third layer:0 Pour Space of material for third layer:0 Infiltration On Infiltration rate:0.324 Infiltration safety factor:1 Total Volume Infiltrated (ac-ft.):28.844 Total Volume Through Riser (ac-ft.):0 Total Volume Through Facility (ac-ft.):28.844 Percent Infiltrated:100 Total Precip Applied to Facility:0 Total Evap From Facility:0 Discharge Structure Riser Height:0 ft. Riser Diameter:0 in. Element Outlets: Outlet 1 Outlet 2 Outlet Flows To: Gravel Trench Bed Hydraulic Table Stage(feet)Area(ac.)Volume(ac-ft.)Discharge(cfs)Infilt(cfs) 0.0000 0.057 0.000 0.000 0.000 0.0222 0.057 0.000 0.000 0.018 0.0444 0.057 0.001 0.000 0.018 0.0667 0.057 0.001 0.000 0.018 0.0889 0.057 0.002 0.000 0.018 0.1111 0.057 0.002 0.000 0.018 0.1333 0.057 0.003 0.000 0.018 0.1556 0.057 0.003 0.000 0.018 0.1778 0.057 0.004 0.000 0.018 0.2000 0.057 0.004 0.000 0.018 0.2222 0.057 0.005 0.000 0.018 0.2444 0.057 0.005 0.000 0.018 0.2667 0.057 0.006 0.000 0.018 0.2889 0.057 0.006 0.000 0.018 0.3111 0.057 0.007 0.000 0.018 0.3333 0.057 0.007 0.000 0.018 0.3556 0.057 0.008 0.000 0.018 0.3778 0.057 0.008 0.000 0.018 0.4000 0.057 0.009 0.000 0.018 0.4222 0.057 0.009 0.000 0.018 0.4444 0.057 0.010 0.000 0.018 0.4667 0.057 0.010 0.000 0.018 0.4889 0.057 0.011 0.000 0.018 Dulay TDA #2 4/29/2025 2:54:28 PM Page 8 0.5111 0.057 0.011 0.000 0.018 0.5333 0.057 0.012 0.000 0.018 0.5556 0.057 0.012 0.000 0.018 0.5778 0.057 0.013 0.000 0.018 0.6000 0.057 0.013 0.000 0.018 0.6222 0.057 0.014 0.000 0.018 0.6444 0.057 0.014 0.000 0.018 0.6667 0.057 0.015 0.000 0.018 0.6889 0.057 0.015 0.000 0.018 0.7111 0.057 0.016 0.000 0.018 0.7333 0.057 0.016 0.000 0.018 0.7556 0.057 0.017 0.000 0.018 0.7778 0.057 0.017 0.000 0.018 0.8000 0.057 0.018 0.000 0.018 0.8222 0.057 0.018 0.000 0.018 0.8444 0.057 0.019 0.000 0.018 0.8667 0.057 0.019 0.000 0.018 0.8889 0.057 0.020 0.000 0.018 0.9111 0.057 0.020 0.000 0.018 0.9333 0.057 0.021 0.000 0.018 0.9556 0.057 0.021 0.000 0.018 0.9778 0.057 0.022 0.000 0.018 1.0000 0.057 0.023 0.000 0.018 1.0222 0.057 0.023 0.000 0.018 1.0444 0.057 0.024 0.000 0.018 1.0667 0.057 0.024 0.000 0.018 1.0889 0.057 0.025 0.000 0.018 1.1111 0.057 0.025 0.000 0.018 1.1333 0.057 0.026 0.000 0.018 1.1556 0.057 0.026 0.000 0.018 1.1778 0.057 0.027 0.000 0.018 1.2000 0.057 0.027 0.000 0.018 1.2222 0.057 0.028 0.000 0.018 1.2444 0.057 0.028 0.000 0.018 1.2667 0.057 0.029 0.000 0.018 1.2889 0.057 0.029 0.000 0.018 1.3111 0.057 0.030 0.000 0.018 1.3333 0.057 0.030 0.000 0.018 1.3556 0.057 0.031 0.000 0.018 1.3778 0.057 0.031 0.000 0.018 1.4000 0.057 0.032 0.000 0.018 1.4222 0.057 0.032 0.000 0.018 1.4444 0.057 0.033 0.000 0.018 1.4667 0.057 0.033 0.000 0.018 1.4889 0.057 0.034 0.000 0.018 1.5111 0.057 0.034 0.000 0.018 1.5333 0.057 0.035 0.000 0.018 1.5556 0.057 0.035 0.000 0.018 1.5778 0.057 0.036 0.000 0.018 1.6000 0.057 0.036 0.000 0.018 1.6222 0.057 0.037 0.000 0.018 1.6444 0.057 0.037 0.000 0.018 1.6667 0.057 0.038 0.000 0.018 1.6889 0.057 0.038 0.000 0.018 1.7111 0.057 0.039 0.000 0.018 1.7333 0.057 0.039 0.000 0.018 1.7556 0.057 0.040 0.000 0.018 1.7778 0.057 0.040 0.000 0.018 Dulay TDA #2 4/29/2025 2:54:28 PM Page 9 1.8000 0.057 0.041 0.000 0.018 1.8222 0.057 0.041 0.000 0.018 1.8444 0.057 0.042 0.000 0.018 1.8667 0.057 0.042 0.000 0.018 1.8889 0.057 0.043 0.000 0.018 1.9111 0.057 0.043 0.000 0.018 1.9333 0.057 0.044 0.000 0.018 1.9556 0.057 0.044 0.000 0.018 1.9778 0.057 0.045 0.000 0.018 2.0000 0.057 0.045 0.000 0.018 Dulay TDA #2 4/29/2025 2:54:28 PM Page 10 Permeable Pavement PVT Road TDA #2 Pavement Area:0.1657 acre.Pavement Length: 361.00 ft. Pavement Width: 20.00 ft. Pavement slope 1:0 To 1 Pavement thickness: 0.666 Pour Space of Pavement: 0.29 Material thickness of second layer: 1 Pour Space of material for second layer: 0.4 Material thickness of third layer: 0 Pour Space of material for third layer: 0 Infiltration On Infiltration rate:0.324 Infiltration safety factor:1 Total Volume Infiltrated (ac-ft.):24.489 Total Volume Through Riser (ac-ft.):0 Total Volume Through Facility (ac-ft.):24.489 Percent Infiltrated:100 Total Precip Applied to Facility:0 Total Evap From Facility:1.751 Discharge Structure Riser Height:1.666 ft. Riser Diameter:240 in. Notch Type:Rectangular Notch Width:5.000 ft. Notch Height:0.000 ft. Element Outlets: Outlet 1 Outlet 2 Outlet Flows To: Permeable Pavement Hydraulic Table Stage(feet)Area(ac.)Volume(ac-ft.)Discharge(cfs)Infilt(cfs) 0.0000 0.165 0.000 0.000 0.000 0.0185 0.165 0.001 0.000 0.054 0.0370 0.165 0.002 0.000 0.054 0.0555 0.165 0.003 0.000 0.054 0.0740 0.165 0.004 0.000 0.054 0.0926 0.165 0.006 0.000 0.054 0.1111 0.165 0.007 0.000 0.054 0.1296 0.165 0.008 0.000 0.054 0.1481 0.165 0.009 0.000 0.054 0.1666 0.165 0.011 0.000 0.054 0.1851 0.165 0.012 0.000 0.054 0.2036 0.165 0.013 0.000 0.054 0.2221 0.165 0.014 0.000 0.054 0.2406 0.165 0.016 0.000 0.054 0.2592 0.165 0.017 0.000 0.054 0.2777 0.165 0.018 0.000 0.054 0.2962 0.165 0.019 0.000 0.054 0.3147 0.165 0.020 0.000 0.054 0.3332 0.165 0.022 0.000 0.054 0.3517 0.165 0.023 0.000 0.054 0.3702 0.165 0.024 0.000 0.054 0.3887 0.165 0.025 0.000 0.054 0.4072 0.165 0.027 0.000 0.054 0.4258 0.165 0.028 0.000 0.054 Dulay TDA #2 4/29/2025 2:54:28 PM Page 11 0.4443 0.165 0.029 0.000 0.054 0.4628 0.165 0.030 0.000 0.054 0.4813 0.165 0.031 0.000 0.054 0.4998 0.165 0.033 0.000 0.054 0.5183 0.165 0.034 0.000 0.054 0.5368 0.165 0.035 0.000 0.054 0.5553 0.165 0.036 0.000 0.054 0.5738 0.165 0.038 0.000 0.054 0.5924 0.165 0.039 0.000 0.054 0.6109 0.165 0.040 0.000 0.054 0.6294 0.165 0.041 0.000 0.054 0.6479 0.165 0.043 0.000 0.054 0.6664 0.165 0.044 0.000 0.054 0.6849 0.165 0.045 0.000 0.054 0.7034 0.165 0.046 0.000 0.054 0.7219 0.165 0.047 0.000 0.054 0.7404 0.165 0.049 0.000 0.054 0.7590 0.165 0.050 0.000 0.054 0.7775 0.165 0.051 0.000 0.054 0.7960 0.165 0.052 0.000 0.054 0.8145 0.165 0.054 0.000 0.054 0.8330 0.165 0.055 0.000 0.054 0.8515 0.165 0.056 0.000 0.054 0.8700 0.165 0.057 0.000 0.054 0.8885 0.165 0.058 0.000 0.054 0.9070 0.165 0.060 0.000 0.054 0.9256 0.165 0.061 0.000 0.054 0.9441 0.165 0.062 0.000 0.054 0.9626 0.165 0.063 0.000 0.054 0.9811 0.165 0.065 0.000 0.054 0.9996 0.165 0.066 0.000 0.054 1.0181 0.165 0.067 0.000 0.054 1.0366 0.165 0.068 0.000 0.054 1.0551 0.165 0.068 0.000 0.054 1.0736 0.165 0.069 0.000 0.054 1.0922 0.165 0.070 0.000 0.054 1.1107 0.165 0.071 0.000 0.054 1.1292 0.165 0.072 0.000 0.054 1.1477 0.165 0.073 0.000 0.054 1.1662 0.165 0.074 0.000 0.054 1.1847 0.165 0.075 0.000 0.054 1.2032 0.165 0.076 0.000 0.054 1.2217 0.165 0.077 0.000 0.054 1.2402 0.165 0.077 0.000 0.054 1.2588 0.165 0.078 0.000 0.054 1.2773 0.165 0.079 0.000 0.054 1.2958 0.165 0.080 0.000 0.054 1.3143 0.165 0.081 0.000 0.054 1.3328 0.165 0.082 0.000 0.054 1.3513 0.165 0.083 0.000 0.054 1.3698 0.165 0.084 0.000 0.054 1.3883 0.165 0.085 0.000 0.054 1.4068 0.165 0.085 0.000 0.054 1.4254 0.165 0.086 0.000 0.054 1.4439 0.165 0.087 0.000 0.054 1.4624 0.165 0.088 0.000 0.054 1.4809 0.165 0.089 0.000 0.054 1.4994 0.165 0.090 0.000 0.054 Dulay TDA #2 4/29/2025 2:54:28 PM Page 12 1.5179 0.165 0.091 0.000 0.054 1.5364 0.165 0.092 0.000 0.054 1.5549 0.165 0.093 0.000 0.054 1.5734 0.165 0.093 0.000 0.054 1.5920 0.165 0.094 0.000 0.054 1.6105 0.165 0.095 0.000 0.054 1.6290 0.165 0.096 0.000 0.054 1.6475 0.165 0.097 0.000 0.054 Dulay TDA #2 4/29/2025 2:54:28 PM Page 13 Permeable Pavement - Driveway - TDA #2 Pavement Area:0.0752 acre.Pavement Length: 163.85 ft. Pavement Width: 20.00 ft. Pavement slope 1:0 To 1 Pavement thickness: 0.666 Pour Space of Pavement: 0.29 Material thickness of second layer: 1 Pour Space of material for second layer: 0.4 Material thickness of third layer: 0 Pour Space of material for third layer: 0 Infiltration On Infiltration rate:0.324 Infiltration safety factor:1 Total Volume Infiltrated (ac-ft.):11.016 Total Volume Through Riser (ac-ft.):0 Total Volume Through Facility (ac-ft.):11.016 Percent Infiltrated:100 Total Precip Applied to Facility:0 Total Evap From Facility:0.794 Discharge Structure Riser Height:1.666 ft. Riser Diameter:240 in. Notch Type:Rectangular Notch Width:5.000 ft. Notch Height:0.000 ft. Element Outlets: Outlet 1 Outlet 2 Outlet Flows To: Permeable Pavement Hydraulic Table Stage(feet)Area(ac.)Volume(ac-ft.)Discharge(cfs)Infilt(cfs) 0.0000 0.075 0.000 0.000 0.000 0.0185 0.075 0.000 0.000 0.024 0.0370 0.075 0.001 0.000 0.024 0.0555 0.075 0.001 0.000 0.024 0.0740 0.075 0.002 0.000 0.024 0.0926 0.075 0.002 0.000 0.024 0.1111 0.075 0.003 0.000 0.024 0.1296 0.075 0.003 0.000 0.024 0.1481 0.075 0.004 0.000 0.024 0.1666 0.075 0.005 0.000 0.024 0.1851 0.075 0.005 0.000 0.024 0.2036 0.075 0.006 0.000 0.024 0.2221 0.075 0.006 0.000 0.024 0.2406 0.075 0.007 0.000 0.024 0.2592 0.075 0.007 0.000 0.024 0.2777 0.075 0.008 0.000 0.024 0.2962 0.075 0.008 0.000 0.024 0.3147 0.075 0.009 0.000 0.024 0.3332 0.075 0.010 0.000 0.024 0.3517 0.075 0.010 0.000 0.024 0.3702 0.075 0.011 0.000 0.024 0.3887 0.075 0.011 0.000 0.024 0.4072 0.075 0.012 0.000 0.024 0.4258 0.075 0.012 0.000 0.024 Dulay TDA #2 4/29/2025 2:54:28 PM Page 14 0.4443 0.075 0.013 0.000 0.024 0.4628 0.075 0.013 0.000 0.024 0.4813 0.075 0.014 0.000 0.024 0.4998 0.075 0.015 0.000 0.024 0.5183 0.075 0.015 0.000 0.024 0.5368 0.075 0.016 0.000 0.024 0.5553 0.075 0.016 0.000 0.024 0.5738 0.075 0.017 0.000 0.024 0.5924 0.075 0.017 0.000 0.024 0.6109 0.075 0.018 0.000 0.024 0.6294 0.075 0.018 0.000 0.024 0.6479 0.075 0.019 0.000 0.024 0.6664 0.075 0.020 0.000 0.024 0.6849 0.075 0.020 0.000 0.024 0.7034 0.075 0.021 0.000 0.024 0.7219 0.075 0.021 0.000 0.024 0.7404 0.075 0.022 0.000 0.024 0.7590 0.075 0.022 0.000 0.024 0.7775 0.075 0.023 0.000 0.024 0.7960 0.075 0.024 0.000 0.024 0.8145 0.075 0.024 0.000 0.024 0.8330 0.075 0.025 0.000 0.024 0.8515 0.075 0.025 0.000 0.024 0.8700 0.075 0.026 0.000 0.024 0.8885 0.075 0.026 0.000 0.024 0.9070 0.075 0.027 0.000 0.024 0.9256 0.075 0.027 0.000 0.024 0.9441 0.075 0.028 0.000 0.024 0.9626 0.075 0.029 0.000 0.024 0.9811 0.075 0.029 0.000 0.024 0.9996 0.075 0.030 0.000 0.024 1.0181 0.075 0.030 0.000 0.024 1.0366 0.075 0.030 0.000 0.024 1.0551 0.075 0.031 0.000 0.024 1.0736 0.075 0.031 0.000 0.024 1.0922 0.075 0.032 0.000 0.024 1.1107 0.075 0.032 0.000 0.024 1.1292 0.075 0.032 0.000 0.024 1.1477 0.075 0.033 0.000 0.024 1.1662 0.075 0.033 0.000 0.024 1.1847 0.075 0.034 0.000 0.024 1.2032 0.075 0.034 0.000 0.024 1.2217 0.075 0.034 0.000 0.024 1.2402 0.075 0.035 0.000 0.024 1.2588 0.075 0.035 0.000 0.024 1.2773 0.075 0.036 0.000 0.024 1.2958 0.075 0.036 0.000 0.024 1.3143 0.075 0.036 0.000 0.024 1.3328 0.075 0.037 0.000 0.024 1.3513 0.075 0.037 0.000 0.024 1.3698 0.075 0.038 0.000 0.024 1.3883 0.075 0.038 0.000 0.024 1.4068 0.075 0.039 0.000 0.024 1.4254 0.075 0.039 0.000 0.024 1.4439 0.075 0.039 0.000 0.024 1.4624 0.075 0.040 0.000 0.024 1.4809 0.075 0.040 0.000 0.024 1.4994 0.075 0.041 0.000 0.024 Dulay TDA #2 4/29/2025 2:54:28 PM Page 15 1.5179 0.075 0.041 0.000 0.024 1.5364 0.075 0.041 0.000 0.024 1.5549 0.075 0.042 0.000 0.024 1.5734 0.075 0.042 0.000 0.024 1.5920 0.075 0.043 0.000 0.024 1.6105 0.075 0.043 0.000 0.024 1.6290 0.075 0.043 0.000 0.024 1.6475 0.075 0.044 0.000 0.024 Dulay TDA #2 4/29/2025 2:54:28 PM Page 16 Analysis Results POC 1 + Predeveloped x Mitigated Predeveloped Landuse Totals for POC #1 Total Pervious Area:0.827 Total Impervious Area:0 Mitigated Landuse Totals for POC #1 Total Pervious Area:0.402 Total Impervious Area:0.424678 Flow Frequency Method:Log Pearson Type III 17B Flow Frequency Return Periods for Predeveloped. POC #1 Return Period Flow(cfs) 2 year 0.024624 5 year 0.040349 10 year 0.050459 25 year 0.062486 50 year 0.070817 100 year 0.078598 Flow Frequency Return Periods for Mitigated. POC #1 Return Period Flow(cfs) 2 year 0 5 year 0 10 year 0 25 year 0 50 year 0 100 year 0 Annual Peaks Annual Peaks for Predeveloped and Mitigated. POC #1 Year Predeveloped Mitigated 1949 0.028 0.000 1950 0.034 0.000 1951 0.054 0.000 1952 0.017 0.000 1953 0.014 0.000 1954 0.021 0.000 1955 0.033 0.000 1956 0.027 0.000 1957 0.022 0.000 1958 0.024 0.000 Dulay TDA #2 4/29/2025 2:54:49 PM Page 17 1959 0.021 0.000 1960 0.037 0.000 1961 0.020 0.000 1962 0.013 0.000 1963 0.017 0.000 1964 0.025 0.000 1965 0.016 0.000 1966 0.016 0.000 1967 0.038 0.000 1968 0.021 0.000 1969 0.021 0.000 1970 0.017 0.000 1971 0.019 0.000 1972 0.041 0.000 1973 0.018 0.000 1974 0.020 0.000 1975 0.028 0.000 1976 0.020 0.000 1977 0.003 0.000 1978 0.017 0.000 1979 0.010 0.000 1980 0.048 0.000 1981 0.015 0.000 1982 0.031 0.000 1983 0.027 0.000 1984 0.016 0.000 1985 0.010 0.000 1986 0.042 0.000 1987 0.037 0.000 1988 0.015 0.000 1989 0.010 0.000 1990 0.089 0.000 1991 0.047 0.000 1992 0.019 0.000 1993 0.019 0.000 1994 0.006 0.000 1995 0.027 0.000 1996 0.062 0.000 1997 0.048 0.000 1998 0.012 0.000 1999 0.053 0.000 2000 0.019 0.000 2001 0.003 0.000 2002 0.022 0.000 2003 0.032 0.000 2004 0.035 0.000 2005 0.026 0.000 2006 0.029 0.000 2007 0.067 0.000 2008 0.082 0.000 2009 0.038 0.000 Ranked Annual Peaks Ranked Annual Peaks for Predeveloped and Mitigated. POC #1 Rank Predeveloped Mitigated 1 0.0892 0.0000 2 0.0822 0.0000 3 0.0674 0.0000 Dulay TDA #2 4/29/2025 2:54:49 PM Page 18 4 0.0624 0.0000 5 0.0538 0.0000 6 0.0528 0.0000 7 0.0482 0.0000 8 0.0481 0.0000 9 0.0473 0.0000 10 0.0422 0.0000 11 0.0408 0.0000 12 0.0383 0.0000 13 0.0378 0.0000 14 0.0372 0.0000 15 0.0371 0.0000 16 0.0347 0.0000 17 0.0336 0.0000 18 0.0335 0.0000 19 0.0325 0.0000 20 0.0312 0.0000 21 0.0290 0.0000 22 0.0283 0.0000 23 0.0279 0.0000 24 0.0270 0.0000 25 0.0270 0.0000 26 0.0267 0.0000 27 0.0258 0.0000 28 0.0247 0.0000 29 0.0242 0.0000 30 0.0218 0.0000 31 0.0218 0.0000 32 0.0213 0.0000 33 0.0209 0.0000 34 0.0207 0.0000 35 0.0207 0.0000 36 0.0204 0.0000 37 0.0201 0.0000 38 0.0200 0.0000 39 0.0193 0.0000 40 0.0188 0.0000 41 0.0188 0.0000 42 0.0188 0.0000 43 0.0181 0.0000 44 0.0174 0.0000 45 0.0169 0.0000 46 0.0169 0.0000 47 0.0166 0.0000 48 0.0164 0.0000 49 0.0161 0.0000 50 0.0158 0.0000 51 0.0151 0.0000 52 0.0147 0.0000 53 0.0136 0.0000 54 0.0127 0.0000 55 0.0118 0.0000 56 0.0102 0.0000 57 0.0097 0.0000 58 0.0095 0.0000 59 0.0063 0.0000 60 0.0034 0.0000 61 0.0029 0.0000 Dulay TDA #2 4/29/2025 2:54:49 PM Page 19 Dulay TDA #2 4/29/2025 2:54:49 PM Page 20 Duration Flows The Facility PASSED Flow(cfs)Predev Mit Percentage Pass/Fail 0.0123 17079 0 0 Pass 0.0129 15490 0 0 Pass 0.0135 14072 0 0 Pass 0.0141 12805 0 0 Pass 0.0147 11569 0 0 Pass 0.0153 10525 0 0 Pass 0.0159 9576 0 0 Pass 0.0164 8763 0 0 Pass 0.0170 8049 0 0 Pass 0.0176 7347 0 0 Pass 0.0182 6733 0 0 Pass 0.0188 6192 0 0 Pass 0.0194 5730 0 0 Pass 0.0200 5309 0 0 Pass 0.0206 4924 0 0 Pass 0.0212 4571 0 0 Pass 0.0218 4239 0 0 Pass 0.0224 3955 0 0 Pass 0.0229 3645 0 0 Pass 0.0235 3388 0 0 Pass 0.0241 3133 0 0 Pass 0.0247 2915 0 0 Pass 0.0253 2706 0 0 Pass 0.0259 2490 0 0 Pass 0.0265 2314 0 0 Pass 0.0271 2136 0 0 Pass 0.0277 1973 0 0 Pass 0.0283 1826 0 0 Pass 0.0289 1704 0 0 Pass 0.0294 1578 0 0 Pass 0.0300 1442 0 0 Pass 0.0306 1325 0 0 Pass 0.0312 1232 0 0 Pass 0.0318 1147 0 0 Pass 0.0324 1086 0 0 Pass 0.0330 1020 0 0 Pass 0.0336 947 0 0 Pass 0.0342 887 0 0 Pass 0.0348 825 0 0 Pass 0.0354 761 0 0 Pass 0.0360 724 0 0 Pass 0.0365 674 0 0 Pass 0.0371 623 0 0 Pass 0.0377 589 0 0 Pass 0.0383 549 0 0 Pass 0.0389 506 0 0 Pass 0.0395 469 0 0 Pass 0.0401 427 0 0 Pass 0.0407 388 0 0 Pass 0.0413 356 0 0 Pass 0.0419 328 0 0 Pass 0.0425 297 0 0 Pass 0.0430 270 0 0 Pass Dulay TDA #2 4/29/2025 2:54:49 PM Page 21 0.0436 241 0 0 Pass 0.0442 218 0 0 Pass 0.0448 198 0 0 Pass 0.0454 173 0 0 Pass 0.0460 152 0 0 Pass 0.0466 130 0 0 Pass 0.0472 119 0 0 Pass 0.0478 104 0 0 Pass 0.0484 95 0 0 Pass 0.0490 83 0 0 Pass 0.0495 74 0 0 Pass 0.0501 69 0 0 Pass 0.0507 61 0 0 Pass 0.0513 53 0 0 Pass 0.0519 46 0 0 Pass 0.0525 39 0 0 Pass 0.0531 29 0 0 Pass 0.0537 25 0 0 Pass 0.0543 22 0 0 Pass 0.0549 20 0 0 Pass 0.0555 17 0 0 Pass 0.0560 14 0 0 Pass 0.0566 12 0 0 Pass 0.0572 8 0 0 Pass 0.0578 7 0 0 Pass 0.0584 7 0 0 Pass 0.0590 7 0 0 Pass 0.0596 6 0 0 Pass 0.0602 6 0 0 Pass 0.0608 6 0 0 Pass 0.0614 6 0 0 Pass 0.0620 6 0 0 Pass 0.0625 5 0 0 Pass 0.0631 5 0 0 Pass 0.0637 5 0 0 Pass 0.0643 5 0 0 Pass 0.0649 5 0 0 Pass 0.0655 5 0 0 Pass 0.0661 5 0 0 Pass 0.0667 4 0 0 Pass 0.0673 4 0 0 Pass 0.0679 3 0 0 Pass 0.0685 3 0 0 Pass 0.0690 3 0 0 Pass 0.0696 3 0 0 Pass 0.0702 3 0 0 Pass 0.0708 3 0 0 Pass Dulay TDA #2 4/29/2025 2:54:49 PM Page 22 Water Quality Water Quality BMP Flow and Volume for POC #1 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. Dulay TDA #2 4/29/2025 2:54:49 PM Page 23 LID Report Dulay TDA #2 4/29/2025 2:54:54 PM Page 24 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. Dulay TDA #2 4/29/2025 2:54:54 PM Page 25 Appendix Predeveloped Schematic Dulay TDA #2 4/29/2025 2:54:54 PM Page 26 Mitigated Schematic Dulay TDA #2 4/29/2025 2:54:55 PM Page 27 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 Dulay TDA #2.wdm MESSU 25 PreDulay TDA #2.MES 27 PreDulay TDA #2.L61 28 PreDulay TDA #2.L62 30 POCDulay TDA #21.dat END FILES OPN SEQUENCE INGRP INDELT 00:15 PERLND 11 COPY 501 DISPLY 1 END INGRP END OPN SEQUENCE DISPLY DISPLY-INFO1 # - #<----------Title----------->***TRAN PIVL DIG1 FIL1 PYR DIG2 FIL2 YRND 1 Existing TDA #2 MAX 1 2 30 9 END DISPLY-INFO1 END DISPLY COPY TIMESERIES # - # NPT NMN *** 1 1 1 501 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 *** 11 C, Forest, 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 *** 11 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 ********* 11 0 0 4 0 0 0 0 0 0 0 0 0 1 9 END PRINT-INFO Dulay TDA #2 4/29/2025 2:54:55 PM Page 28 PWAT-PARM1 <PLS > PWATER variable monthly parameter value flags *** # - # CSNO RTOP UZFG VCS VUZ VNN VIFW VIRC VLE INFC HWT *** 11 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 11 0 4.5 0.08 400 0.1 0.5 0.996 END PWAT-PARM2 PWAT-PARM3 <PLS > PWATER input info: Part 3 *** # - # ***PETMAX PETMIN INFEXP INFILD DEEPFR BASETP AGWETP 11 0 0 2 2 0 0 0 END PWAT-PARM3 PWAT-PARM4 <PLS > PWATER input info: Part 4 *** # - # CEPSC UZSN NSUR INTFW IRC LZETP *** 11 0.2 0.5 0.35 6 0.5 0.7 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 11 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 *** END GEN-INFO *** Section IWATER*** ACTIVITY <PLS > ************* Active Sections ***************************** # - # ATMP SNOW IWAT SLD IWG IQAL *** END ACTIVITY PRINT-INFO <ILS > ******** Print-flags ******** PIVL PYR # - # ATMP SNOW IWAT SLD IWG IQAL ********* END PRINT-INFO IWAT-PARM1 <PLS > IWATER variable monthly parameter value flags *** # - # CSNO RTOP VRS VNN RTLI *** END IWAT-PARM1 IWAT-PARM2 <PLS > IWATER input info: Part 2 *** # - # *** LSUR SLSUR NSUR RETSC END IWAT-PARM2 IWAT-PARM3 <PLS > IWATER input info: Part 3 *** # - # ***PETMAX PETMIN END IWAT-PARM3 IWAT-STATE1 <PLS > *** Initial conditions at start of simulation # - # *** RETS SURS END IWAT-STATE1 Dulay TDA #2 4/29/2025 2:54:55 PM Page 29 END IMPLND SCHEMATIC <-Source-> <--Area--> <-Target-> MBLK *** <Name> # <-factor-> <Name> # Tbl# *** Existing TDA #2*** PERLND 11 0.827 COPY 501 12 PERLND 11 0.827 COPY 501 13 ******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 <-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 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 Dulay TDA #2 4/29/2025 2:54:55 PM Page 30 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 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 END MASS-LINK END RUN Dulay TDA #2 4/29/2025 2:54:55 PM Page 31 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 Dulay TDA #2.wdm MESSU 25 MitDulay TDA #2.MES 27 MitDulay TDA #2.L61 28 MitDulay TDA #2.L62 30 POCDulay TDA #21.dat END FILES OPN SEQUENCE INGRP INDELT 00:15 IMPLND 4 PERLND 38 IMPLND 17 RCHRES 1 RCHRES 2 IMPLND 16 RCHRES 3 COPY 1 COPY 501 DISPLY 1 END INGRP END OPN SEQUENCE DISPLY DISPLY-INFO1 # - #<----------Title----------->***TRAN PIVL DIG1 FIL1 PYR DIG2 FIL2 YRND 1 Permeable Pavement - Driv MAX 1 2 30 9 END DISPLY-INFO1 END DISPLY COPY TIMESERIES # - # NPT NMN *** 1 1 1 501 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 *** 38 A/B, Lawn, Flat 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 *** 38 0 0 1 0 0 0 0 0 0 0 0 0 END ACTIVITY Dulay TDA #2 4/29/2025 2:54:55 PM Page 32 PRINT-INFO <PLS > ***************** Print-flags ***************************** PIVL PYR # - # ATMP SNOW PWAT SED PST PWG PQAL MSTL PEST NITR PHOS TRAC ********* 38 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 *** 38 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 38 0 5 0.8 400 0.05 0.3 0.996 END PWAT-PARM2 PWAT-PARM3 <PLS > PWATER input info: Part 3 *** # - # ***PETMAX PETMIN INFEXP INFILD DEEPFR BASETP AGWETP 38 0 0 2 2 0 0 0 END PWAT-PARM3 PWAT-PARM4 <PLS > PWATER input info: Part 4 *** # - # CEPSC UZSN NSUR INTFW IRC LZETP *** 38 0.1 0.5 0.25 0 0.7 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 38 0 0 0 0 3 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 17 Porous Pavement 1 1 1 27 0 16 Porous Pavement 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 17 0 0 1 0 0 0 16 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 4 1 9 17 0 0 4 0 0 0 1 9 16 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 *** 4 0 0 0 0 0 Dulay TDA #2 4/29/2025 2:54:55 PM Page 33 17 0 0 0 0 0 16 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 17 400 0.01 0.1 0.1 16 400 0.01 0.1 0.1 END IWAT-PARM2 IWAT-PARM3 <PLS > IWATER input info: Part 3 *** # - # ***PETMAX PETMIN 4 0 0 17 0 0 16 0 0 END IWAT-PARM3 IWAT-STATE1 <PLS > *** Initial conditions at start of simulation # - # *** RETS SURS 4 0 0 17 0 0 16 0 0 END IWAT-STATE1 END IMPLND SCHEMATIC <-Source-> <--Area--> <-Target-> MBLK *** <Name> # <-factor-> <Name> # Tbl# *** Roof Areas - TDA #2*** IMPLND 4 0.1837 RCHRES 2 5 Lateral Basin - A/B, Lawn, Flat TDA #2*** PERLND 38 2.4254 IMPLND 16 54 IMPLND 16 0.1657 RCHRES 3 5 IMPLND 17 0.0752 RCHRES 1 5 ******Routing****** IMPLND 4 0.1837 COPY 1 15 PERLND 38 0.402 COPY 1 12 RCHRES 2 1 COPY 501 17 RCHRES 3 1 COPY 501 17 RCHRES 1 1 COPY 501 17 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 <-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 *** 1 Permeable Paveme-009 2 1 1 1 28 0 1 2 Gravel Trench Be-006 2 1 1 1 28 0 1 3 Permeable Paveme-008 2 1 1 1 28 0 1 END GEN-INFO *** Section RCHRES*** Dulay TDA #2 4/29/2025 2:54:55 PM Page 34 ACTIVITY <PLS > ************* Active Sections ***************************** # - # HYFG ADFG CNFG HTFG SDFG GQFG OXFG NUFG PKFG PHFG *** 1 1 0 0 0 0 0 0 0 0 0 2 1 0 0 0 0 0 0 0 0 0 3 1 0 0 0 0 0 0 0 0 0 END ACTIVITY PRINT-INFO <PLS > ***************** Print-flags ******************* PIVL PYR # - # HYDR ADCA CONS HEAT SED GQL OXRX NUTR PLNK PHCB PIVL PYR ********* 1 4 0 0 0 0 0 0 0 0 0 1 9 2 4 0 0 0 0 0 0 0 0 0 1 9 3 4 0 0 0 0 0 0 0 0 0 1 9 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 * * * * * * * * * * * * * * *** 1 0 1 0 0 4 5 0 0 0 0 0 0 0 0 2 2 2 2 2 2 0 1 0 0 4 5 0 0 0 0 0 0 0 0 2 2 2 2 2 3 0 1 0 0 4 5 0 0 0 0 0 0 0 0 2 2 2 2 2 END HYDR-PARM1 HYDR-PARM2 # - # FTABNO LEN DELTH STCOR KS DB50 *** <------><--------><--------><--------><--------><--------><--------> *** 1 1 0.03 0.0 0.0 0.5 0.0 2 2 0.02 0.0 0.0 0.5 0.0 3 3 0.07 0.0 0.0 0.5 0.0 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 <------><--------> <---><---><---><---><---> *** <---><---><---><---><---> 1 0 4.0 5.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 2 0 4.0 5.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 3 0 4.0 5.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 END HYDR-INIT END RCHRES SPEC-ACTIONS END SPEC-ACTIONS FTABLES FTABLE 2 92 5 Depth Area Volume Outflow1 Outflow2 Velocity Travel Time*** (ft) (acres) (acre-ft) (cfs) (cfs) (ft/sec) (Minutes)*** 0.000000 0.057392 0.000000 0.000000 0.000000 0.022222 0.057392 0.000510 0.000000 0.018750 0.044444 0.057392 0.001020 0.000000 0.018750 0.066667 0.057392 0.001530 0.000000 0.018750 0.088889 0.057392 0.002041 0.000000 0.018750 0.111111 0.057392 0.002551 0.000000 0.018750 0.133333 0.057392 0.003061 0.000000 0.018750 0.155556 0.057392 0.003571 0.000000 0.018750 0.177778 0.057392 0.004081 0.000000 0.018750 0.200000 0.057392 0.004591 0.000000 0.018750 0.222222 0.057392 0.005102 0.000000 0.018750 0.244444 0.057392 0.005612 0.000000 0.018750 0.266667 0.057392 0.006122 0.000000 0.018750 0.288889 0.057392 0.006632 0.000000 0.018750 0.311111 0.057392 0.007142 0.000000 0.018750 0.333333 0.057392 0.007652 0.000000 0.018750 0.355556 0.057392 0.008162 0.000000 0.018750 0.377778 0.057392 0.008673 0.000000 0.018750 0.400000 0.057392 0.009183 0.000000 0.018750 Dulay TDA #2 4/29/2025 2:54:55 PM Page 35 0.422222 0.057392 0.009693 0.000000 0.018750 0.444444 0.057392 0.010203 0.000000 0.018750 0.466667 0.057392 0.010713 0.000000 0.018750 0.488889 0.057392 0.011223 0.000000 0.018750 0.511111 0.057392 0.011733 0.000000 0.018750 0.533333 0.057392 0.012244 0.000000 0.018750 0.555556 0.057392 0.012754 0.000000 0.018750 0.577778 0.057392 0.013264 0.000000 0.018750 0.600000 0.057392 0.013774 0.000000 0.018750 0.622222 0.057392 0.014284 0.000000 0.018750 0.644444 0.057392 0.014794 0.000000 0.018750 0.666667 0.057392 0.015305 0.000000 0.018750 0.688889 0.057392 0.015815 0.000000 0.018750 0.711111 0.057392 0.016325 0.000000 0.018750 0.733333 0.057392 0.016835 0.000000 0.018750 0.755556 0.057392 0.017345 0.000000 0.018750 0.777778 0.057392 0.017855 0.000000 0.018750 0.800000 0.057392 0.018365 0.000000 0.018750 0.822222 0.057392 0.018876 0.000000 0.018750 0.844444 0.057392 0.019386 0.000000 0.018750 0.866667 0.057392 0.019896 0.000000 0.018750 0.888889 0.057392 0.020406 0.000000 0.018750 0.911111 0.057392 0.020916 0.000000 0.018750 0.933333 0.057392 0.021426 0.000000 0.018750 0.955556 0.057392 0.021937 0.000000 0.018750 0.977778 0.057392 0.022447 0.000000 0.018750 1.000000 0.057392 0.022957 0.000000 0.018750 1.022222 0.057392 0.023467 0.000000 0.018750 1.044444 0.057392 0.023977 0.000000 0.018750 1.066667 0.057392 0.024487 0.000000 0.018750 1.088889 0.057392 0.024997 0.000000 0.018750 1.111111 0.057392 0.025508 0.000000 0.018750 1.133333 0.057392 0.026018 0.000000 0.018750 1.155556 0.057392 0.026528 0.000000 0.018750 1.177778 0.057392 0.027038 0.000000 0.018750 1.200000 0.057392 0.027548 0.000000 0.018750 1.222222 0.057392 0.028058 0.000000 0.018750 1.244444 0.057392 0.028569 0.000000 0.018750 1.266667 0.057392 0.029079 0.000000 0.018750 1.288889 0.057392 0.029589 0.000000 0.018750 1.311111 0.057392 0.030099 0.000000 0.018750 1.333333 0.057392 0.030609 0.000000 0.018750 1.355556 0.057392 0.031119 0.000000 0.018750 1.377778 0.057392 0.031629 0.000000 0.018750 1.400000 0.057392 0.032140 0.000000 0.018750 1.422222 0.057392 0.032650 0.000000 0.018750 1.444444 0.057392 0.033160 0.000000 0.018750 1.466667 0.057392 0.033670 0.000000 0.018750 1.488889 0.057392 0.034180 0.000000 0.018750 1.511111 0.057392 0.034690 0.000000 0.018750 1.533333 0.057392 0.035200 0.000000 0.018750 1.555556 0.057392 0.035711 0.000000 0.018750 1.577778 0.057392 0.036221 0.000000 0.018750 1.600000 0.057392 0.036731 0.000000 0.018750 1.622222 0.057392 0.037241 0.000000 0.018750 1.644444 0.057392 0.037751 0.000000 0.018750 1.666667 0.057392 0.038261 0.000000 0.018750 1.688889 0.057392 0.038772 0.000000 0.018750 1.711111 0.057392 0.039282 0.000000 0.018750 1.733333 0.057392 0.039792 0.000000 0.018750 1.755556 0.057392 0.040302 0.000000 0.018750 1.777778 0.057392 0.040812 0.000000 0.018750 1.800000 0.057392 0.041322 0.000000 0.018750 1.822222 0.057392 0.041832 0.000000 0.018750 1.844444 0.057392 0.042343 0.000000 0.018750 1.866667 0.057392 0.042853 0.000000 0.018750 1.888889 0.057392 0.043363 0.000000 0.018750 1.911111 0.057392 0.043873 0.000000 0.018750 1.933333 0.057392 0.044383 0.000000 0.018750 1.955556 0.057392 0.044893 0.000000 0.018750 Dulay TDA #2 4/29/2025 2:54:55 PM Page 36 1.977778 0.057392 0.045404 0.000000 0.018750 2.000000 0.057392 0.045914 0.000000 0.018750 2.022222 0.057392 0.047189 0.000000 0.018750 END FTABLE 2 FTABLE 3 90 5 Depth Area Volume Outflow1 Outflow2 Velocity Travel Time*** (ft) (acres) (acre-ft) (cfs) (cfs) (ft/sec) (Minutes)*** 0.000000 0.165748 0.000000 0.000000 0.000000 0.018511 0.165748 0.001227 0.000000 0.054150 0.037022 0.165748 0.002455 0.000000 0.054150 0.055533 0.165748 0.003682 0.000000 0.054150 0.074044 0.165748 0.004909 0.000000 0.054150 0.092556 0.165748 0.006136 0.000000 0.054150 0.111067 0.165748 0.007364 0.000000 0.054150 0.129578 0.165748 0.008591 0.000000 0.054150 0.148089 0.165748 0.009818 0.000000 0.054150 0.166600 0.165748 0.011045 0.000000 0.054150 0.185111 0.165748 0.012273 0.000000 0.054150 0.203622 0.165748 0.013500 0.000000 0.054150 0.222133 0.165748 0.014727 0.000000 0.054150 0.240644 0.165748 0.015955 0.000000 0.054150 0.259156 0.165748 0.017182 0.000000 0.054150 0.277667 0.165748 0.018409 0.000000 0.054150 0.296178 0.165748 0.019636 0.000000 0.054150 0.314689 0.165748 0.020864 0.000000 0.054150 0.333200 0.165748 0.022091 0.000000 0.054150 0.351711 0.165748 0.023318 0.000000 0.054150 0.370222 0.165748 0.024545 0.000000 0.054150 0.388733 0.165748 0.025773 0.000000 0.054150 0.407244 0.165748 0.027000 0.000000 0.054150 0.425756 0.165748 0.028227 0.000000 0.054150 0.444267 0.165748 0.029455 0.000000 0.054150 0.462778 0.165748 0.030682 0.000000 0.054150 0.481289 0.165748 0.031909 0.000000 0.054150 0.499800 0.165748 0.033136 0.000000 0.054150 0.518311 0.165748 0.034364 0.000000 0.054150 0.536822 0.165748 0.035591 0.000000 0.054150 0.555333 0.165748 0.036818 0.000000 0.054150 0.573844 0.165748 0.038046 0.000000 0.054150 0.592356 0.165748 0.039273 0.000000 0.054150 0.610867 0.165748 0.040500 0.000000 0.054150 0.629378 0.165748 0.041727 0.000000 0.054150 0.647889 0.165748 0.042955 0.000000 0.054150 0.666400 0.165748 0.044182 0.000000 0.054150 0.684911 0.165748 0.045409 0.000000 0.054150 0.703422 0.165748 0.046636 0.000000 0.054150 0.721933 0.165748 0.047864 0.000000 0.054150 0.740444 0.165748 0.049091 0.000000 0.054150 0.758956 0.165748 0.050318 0.000000 0.054150 0.777467 0.165748 0.051546 0.000000 0.054150 0.795978 0.165748 0.052773 0.000000 0.054150 0.814489 0.165748 0.054000 0.000000 0.054150 0.833000 0.165748 0.055227 0.000000 0.054150 0.851511 0.165748 0.056455 0.000000 0.054150 0.870022 0.165748 0.057682 0.000000 0.054150 0.888533 0.165748 0.058909 0.000000 0.054150 0.907044 0.165748 0.060136 0.000000 0.054150 0.925556 0.165748 0.061364 0.000000 0.054150 0.944067 0.165748 0.062591 0.000000 0.054150 0.962578 0.165748 0.063818 0.000000 0.054150 0.981089 0.165748 0.065046 0.000000 0.054150 0.999600 0.165748 0.066273 0.000000 0.054150 1.018111 0.165748 0.067163 0.000000 0.054150 1.036622 0.165748 0.068052 0.000000 0.054150 1.055133 0.165748 0.068942 0.000000 0.054150 1.073644 0.165748 0.069832 0.000000 0.054150 1.092156 0.165748 0.070722 0.000000 0.054150 1.110667 0.165748 0.071611 0.000000 0.054150 1.129178 0.165748 0.072501 0.000000 0.054150 Dulay TDA #2 4/29/2025 2:54:55 PM Page 37 1.147689 0.165748 0.073391 0.000000 0.054150 1.166200 0.165748 0.074281 0.000000 0.054150 1.184711 0.165748 0.075171 0.000000 0.054150 1.203222 0.165748 0.076060 0.000000 0.054150 1.221733 0.165748 0.076950 0.000000 0.054150 1.240244 0.165748 0.077840 0.000000 0.054150 1.258756 0.165748 0.078730 0.000000 0.054150 1.277267 0.165748 0.079619 0.000000 0.054150 1.295778 0.165748 0.080509 0.000000 0.054150 1.314289 0.165748 0.081399 0.000000 0.054150 1.332800 0.165748 0.082289 0.000000 0.054150 1.351311 0.165748 0.083179 0.000000 0.054150 1.369822 0.165748 0.084068 0.000000 0.054150 1.388333 0.165748 0.084958 0.000000 0.054150 1.406844 0.165748 0.085848 0.000000 0.054150 1.425356 0.165748 0.086738 0.000000 0.054150 1.443867 0.165748 0.087627 0.000000 0.054150 1.462378 0.165748 0.088517 0.000000 0.054150 1.480889 0.165748 0.089407 0.000000 0.054150 1.499400 0.165748 0.090297 0.000000 0.054150 1.517911 0.165748 0.091187 0.000000 0.054150 1.536422 0.165748 0.092076 0.000000 0.054150 1.554933 0.165748 0.092966 0.000000 0.054150 1.573444 0.165748 0.093856 0.000000 0.054150 1.591956 0.165748 0.094746 0.000000 0.054150 1.610467 0.165748 0.095635 0.000000 0.054150 1.628978 0.165748 0.096525 0.000000 0.054150 1.647489 0.165748 0.097415 0.000000 0.054150 END FTABLE 3 FTABLE 1 90 5 Depth Area Volume Outflow1 Outflow2 Velocity Travel Time*** (ft) (acres) (acre-ft) (cfs) (cfs) (ft/sec) (Minutes)*** 0.000000 0.075230 0.000000 0.000000 0.000000 0.018511 0.075230 0.000557 0.000000 0.024578 0.037022 0.075230 0.001114 0.000000 0.024578 0.055533 0.075230 0.001671 0.000000 0.024578 0.074044 0.075230 0.002228 0.000000 0.024578 0.092556 0.075230 0.002785 0.000000 0.024578 0.111067 0.075230 0.003342 0.000000 0.024578 0.129578 0.075230 0.003899 0.000000 0.024578 0.148089 0.075230 0.004456 0.000000 0.024578 0.166600 0.075230 0.005013 0.000000 0.024578 0.185111 0.075230 0.005570 0.000000 0.024578 0.203622 0.075230 0.006127 0.000000 0.024578 0.222133 0.075230 0.006684 0.000000 0.024578 0.240644 0.075230 0.007241 0.000000 0.024578 0.259156 0.075230 0.007798 0.000000 0.024578 0.277667 0.075230 0.008355 0.000000 0.024578 0.296178 0.075230 0.008913 0.000000 0.024578 0.314689 0.075230 0.009470 0.000000 0.024578 0.333200 0.075230 0.010027 0.000000 0.024578 0.351711 0.075230 0.010584 0.000000 0.024578 0.370222 0.075230 0.011141 0.000000 0.024578 0.388733 0.075230 0.011698 0.000000 0.024578 0.407244 0.075230 0.012255 0.000000 0.024578 0.425756 0.075230 0.012812 0.000000 0.024578 0.444267 0.075230 0.013369 0.000000 0.024578 0.462778 0.075230 0.013926 0.000000 0.024578 0.481289 0.075230 0.014483 0.000000 0.024578 0.499800 0.075230 0.015040 0.000000 0.024578 0.518311 0.075230 0.015597 0.000000 0.024578 0.536822 0.075230 0.016154 0.000000 0.024578 0.555333 0.075230 0.016711 0.000000 0.024578 0.573844 0.075230 0.017268 0.000000 0.024578 0.592356 0.075230 0.017825 0.000000 0.024578 0.610867 0.075230 0.018382 0.000000 0.024578 0.629378 0.075230 0.018939 0.000000 0.024578 0.647889 0.075230 0.019496 0.000000 0.024578 0.666400 0.075230 0.020053 0.000000 0.024578 Dulay TDA #2 4/29/2025 2:54:55 PM Page 38 0.684911 0.075230 0.020610 0.000000 0.024578 0.703422 0.075230 0.021167 0.000000 0.024578 0.721933 0.075230 0.021724 0.000000 0.024578 0.740444 0.075230 0.022281 0.000000 0.024578 0.758956 0.075230 0.022838 0.000000 0.024578 0.777467 0.075230 0.023395 0.000000 0.024578 0.795978 0.075230 0.023952 0.000000 0.024578 0.814489 0.075230 0.024509 0.000000 0.024578 0.833000 0.075230 0.025066 0.000000 0.024578 0.851511 0.075230 0.025624 0.000000 0.024578 0.870022 0.075230 0.026181 0.000000 0.024578 0.888533 0.075230 0.026738 0.000000 0.024578 0.907044 0.075230 0.027295 0.000000 0.024578 0.925556 0.075230 0.027852 0.000000 0.024578 0.944067 0.075230 0.028409 0.000000 0.024578 0.962578 0.075230 0.028966 0.000000 0.024578 0.981089 0.075230 0.029523 0.000000 0.024578 0.999600 0.075230 0.030080 0.000000 0.024578 1.018111 0.075230 0.030484 0.000000 0.024578 1.036622 0.075230 0.030887 0.000000 0.024578 1.055133 0.075230 0.031291 0.000000 0.024578 1.073644 0.075230 0.031695 0.000000 0.024578 1.092156 0.075230 0.032099 0.000000 0.024578 1.110667 0.075230 0.032503 0.000000 0.024578 1.129178 0.075230 0.032907 0.000000 0.024578 1.147689 0.075230 0.033311 0.000000 0.024578 1.166200 0.075230 0.033714 0.000000 0.024578 1.184711 0.075230 0.034118 0.000000 0.024578 1.203222 0.075230 0.034522 0.000000 0.024578 1.221733 0.075230 0.034926 0.000000 0.024578 1.240244 0.075230 0.035330 0.000000 0.024578 1.258756 0.075230 0.035734 0.000000 0.024578 1.277267 0.075230 0.036138 0.000000 0.024578 1.295778 0.075230 0.036541 0.000000 0.024578 1.314289 0.075230 0.036945 0.000000 0.024578 1.332800 0.075230 0.037349 0.000000 0.024578 1.351311 0.075230 0.037753 0.000000 0.024578 1.369822 0.075230 0.038157 0.000000 0.024578 1.388333 0.075230 0.038561 0.000000 0.024578 1.406844 0.075230 0.038964 0.000000 0.024578 1.425356 0.075230 0.039368 0.000000 0.024578 1.443867 0.075230 0.039772 0.000000 0.024578 1.462378 0.075230 0.040176 0.000000 0.024578 1.480889 0.075230 0.040580 0.000000 0.024578 1.499400 0.075230 0.040984 0.000000 0.024578 1.517911 0.075230 0.041388 0.000000 0.024578 1.536422 0.075230 0.041791 0.000000 0.024578 1.554933 0.075230 0.042195 0.000000 0.024578 1.573444 0.075230 0.042599 0.000000 0.024578 1.591956 0.075230 0.043003 0.000000 0.024578 1.610467 0.075230 0.043407 0.000000 0.024578 1.628978 0.075230 0.043811 0.000000 0.024578 1.647489 0.075230 0.044215 0.000000 0.024578 END FTABLE 1 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 WDM 1 EVAP ENGL 0.76 RCHRES 1 EXTNL POTEV WDM 1 EVAP ENGL 0.76 RCHRES 3 EXTNL POTEV END EXT SOURCES EXT TARGETS <-Volume-> <-Grp> <-Member-><--Mult-->Tran <-Volume-> <Member> Tsys Tgap Amd *** Dulay TDA #2 4/29/2025 2:54:55 PM Page 39 <Name> # <Name> # #<-factor->strg <Name> # <Name> tem strg strg*** RCHRES 2 HYDR RO 1 1 1 WDM 1000 FLOW ENGL REPL RCHRES 2 HYDR O 1 1 1 WDM 1001 FLOW ENGL REPL RCHRES 2 HYDR O 2 1 1 WDM 1002 FLOW ENGL REPL RCHRES 2 HYDR STAGE 1 1 1 WDM 1003 STAG ENGL REPL 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 RCHRES 3 HYDR RO 1 1 1 WDM 1004 FLOW ENGL REPL RCHRES 3 HYDR O 1 1 1 WDM 1005 FLOW ENGL REPL RCHRES 3 HYDR O 2 1 1 WDM 1006 FLOW ENGL REPL RCHRES 3 HYDR STAGE 1 1 1 WDM 1007 STAG ENGL REPL RCHRES 1 HYDR RO 1 1 1 WDM 1008 FLOW ENGL REPL RCHRES 1 HYDR O 1 1 1 WDM 1009 FLOW ENGL REPL RCHRES 1 HYDR O 2 1 1 WDM 1010 FLOW ENGL REPL RCHRES 1 HYDR STAGE 1 1 1 WDM 1011 STAG ENGL REPL END EXT TARGETS MASS-LINK <Volume> <-Grp> <-Member-><--Mult--> <Target> <-Grp> <-Member->*** <Name> <Name> # #<-factor-> <Name> <Name> # #*** MASS-LINK 5 IMPLND IWATER SURO 0.083333 RCHRES INFLOW IVOL END MASS-LINK 5 MASS-LINK 12 PERLND PWATER SURO 0.083333 COPY INPUT MEAN END MASS-LINK 12 MASS-LINK 15 IMPLND IWATER SURO 0.083333 COPY INPUT MEAN END MASS-LINK 15 MASS-LINK 17 RCHRES OFLOW OVOL 1 COPY INPUT MEAN END MASS-LINK 17 MASS-LINK 54 PERLND PWATER SURO IMPLND EXTNL SURLI END MASS-LINK 54 END MASS-LINK END RUN Dulay TDA #2 4/29/2025 2:54:55 PM Page 40 Predeveloped HSPF Message File Dulay TDA #2 4/29/2025 2:54:55 PM Page 41 Mitigated HSPF Message File Dulay TDA #2 4/29/2025 2:54:55 PM Page 42 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 WWHM2012 PROJECT REPORT WWHM Report for TDA #3 Frontage Improvement Area 4-30-2025 Figure D4 Dulay TDA #3 4/30/2025 7:15:54 AM Page 2 General Model Information WWHM2012 Project Name:Dulay TDA #3 Site Name:Dulay TDA #3 Site Address:18855 102nd Ave se City:Renton Report Date:4/30/2025 Gage:Seatac Data Start:1948/10/01 Data End:2009/09/30 Timestep:15 Minute Precip Scale:1.000 Version Date:2024/10/15 Version:4.3.1 POC Thresholds Low Flow Threshold for POC1:50 Percent of the 2 Year High Flow Threshold for POC1:50 Year Dulay TDA #3 4/30/2025 7:15:54 AM Page 3 Landuse Basin Data Predeveloped Land Use Existing TDA #3 - Frontage Bypass:No GroundWater:No Pervious Land Use acre C, Forest, Flat 0.0562 Pervious Total 0.0562 Impervious Land Use acre Impervious Total 0 Basin Total 0.0562 Element Flow Componants: Surface Interflow Groundwater Componant Flows To: POC 1 POC 1 Dulay TDA #3 4/30/2025 7:15:54 AM Page 4 Mitigated Land Use Frontage - TDA #3 Bypass:No GroundWater:No Pervious Land Use acre C, Lawn, Flat 0.02921 Pervious Total 0.02921 Impervious Land Use acre ROADS FLAT 0.00519 DRIVEWAYS FLAT 0.0057 SIDEWALKS FLAT 0.0161 Impervious Total 0.02699 Basin Total 0.0562 Element Flow Componants: Surface Interflow Groundwater Componant Flows To: POC 1 POC 1 Dulay TDA #3 4/30/2025 7:15:54 AM Page 5 Routing Elements Predeveloped Routing Dulay TDA #3 4/30/2025 7:15:54 AM Page 6 Mitigated Routing Dulay TDA #3 4/30/2025 7:15:54 AM Page 7 Analysis Results POC 1 + Predeveloped x Mitigated Predeveloped Landuse Totals for POC #1 Total Pervious Area:0.0562 Total Impervious Area:0 Mitigated Landuse Totals for POC #1 Total Pervious Area:0.02921 Total Impervious Area:0.02699 Flow Frequency Method:Log Pearson Type III 17B Flow Frequency Return Periods for Predeveloped. POC #1 Return Period Flow(cfs) 2 year 0.001652 5 year 0.002595 10 year 0.003129 25 year 0.003695 50 year 0.004046 100 year 0.004343 Flow Frequency Return Periods for Mitigated. POC #1 Return Period Flow(cfs) 2 year 0.012255 5 year 0.016384 10 year 0.019314 25 year 0.023247 50 year 0.026349 100 year 0.029603 Annual Peaks Annual Peaks for Predeveloped and Mitigated. POC #1 Year Predeveloped Mitigated 1949 0.002 0.018 1950 0.002 0.016 1951 0.004 0.011 1952 0.001 0.008 1953 0.001 0.008 1954 0.001 0.010 1955 0.002 0.011 1956 0.002 0.011 1957 0.001 0.013 1958 0.002 0.010 Dulay TDA #3 4/30/2025 7:16:13 AM Page 8 1959 0.001 0.009 1960 0.002 0.011 1961 0.001 0.011 1962 0.001 0.009 1963 0.001 0.011 1964 0.002 0.010 1965 0.001 0.014 1966 0.001 0.008 1967 0.002 0.017 1968 0.001 0.017 1969 0.001 0.013 1970 0.001 0.011 1971 0.001 0.014 1972 0.003 0.016 1973 0.001 0.007 1974 0.001 0.013 1975 0.002 0.014 1976 0.001 0.010 1977 0.000 0.010 1978 0.001 0.012 1979 0.001 0.015 1980 0.003 0.019 1981 0.001 0.012 1982 0.002 0.020 1983 0.002 0.013 1984 0.001 0.009 1985 0.001 0.013 1986 0.003 0.011 1987 0.003 0.015 1988 0.001 0.009 1989 0.001 0.011 1990 0.005 0.029 1991 0.003 0.022 1992 0.001 0.009 1993 0.001 0.007 1994 0.000 0.007 1995 0.002 0.011 1996 0.004 0.014 1997 0.003 0.013 1998 0.001 0.011 1999 0.003 0.026 2000 0.001 0.012 2001 0.000 0.012 2002 0.001 0.017 2003 0.002 0.014 2004 0.002 0.024 2005 0.002 0.011 2006 0.002 0.010 2007 0.004 0.026 2008 0.005 0.021 2009 0.002 0.013 Ranked Annual Peaks Ranked Annual Peaks for Predeveloped and Mitigated. POC #1 Rank Predeveloped Mitigated 1 0.0053 0.0293 2 0.0051 0.0264 3 0.0039 0.0262 Dulay TDA #3 4/30/2025 7:16:13 AM Page 9 4 0.0039 0.0241 5 0.0036 0.0215 6 0.0032 0.0211 7 0.0032 0.0196 8 0.0030 0.0190 9 0.0029 0.0176 10 0.0027 0.0174 11 0.0026 0.0168 12 0.0025 0.0166 13 0.0025 0.0165 14 0.0025 0.0165 15 0.0023 0.0153 16 0.0023 0.0152 17 0.0022 0.0141 18 0.0020 0.0137 19 0.0020 0.0136 20 0.0020 0.0136 21 0.0018 0.0136 22 0.0018 0.0134 23 0.0018 0.0134 24 0.0018 0.0134 25 0.0018 0.0130 26 0.0017 0.0128 27 0.0016 0.0127 28 0.0016 0.0125 29 0.0016 0.0124 30 0.0015 0.0123 31 0.0014 0.0118 32 0.0014 0.0117 33 0.0014 0.0114 34 0.0014 0.0114 35 0.0014 0.0111 36 0.0014 0.0111 37 0.0013 0.0110 38 0.0013 0.0109 39 0.0013 0.0109 40 0.0013 0.0109 41 0.0012 0.0108 42 0.0012 0.0108 43 0.0012 0.0108 44 0.0012 0.0107 45 0.0011 0.0102 46 0.0011 0.0101 47 0.0011 0.0099 48 0.0011 0.0098 49 0.0011 0.0096 50 0.0011 0.0095 51 0.0010 0.0092 52 0.0010 0.0091 53 0.0009 0.0087 54 0.0009 0.0087 55 0.0007 0.0085 56 0.0007 0.0084 57 0.0007 0.0083 58 0.0006 0.0077 59 0.0004 0.0073 60 0.0002 0.0073 61 0.0002 0.0073 Dulay TDA #3 4/30/2025 7:16:13 AM Page 10 Dulay TDA #3 4/30/2025 7:16:13 AM Page 11 Duration Flows The Duration Matching Failed Flow(cfs)Predev Mit Percentage Pass/Fail 0.0008 17558 101511 578 Fail 0.0009 16191 97618 602 Fail 0.0009 14970 93747 626 Fail 0.0009 13871 90175 650 Fail 0.0010 12816 86753 676 Fail 0.0010 11828 83652 707 Fail 0.0010 10902 80443 737 Fail 0.0011 10134 77620 765 Fail 0.0011 9388 74818 796 Fail 0.0011 8748 72209 825 Fail 0.0012 8149 69663 854 Fail 0.0012 7608 67311 884 Fail 0.0012 7065 65001 920 Fail 0.0012 6596 62862 953 Fail 0.0013 6149 60680 986 Fail 0.0013 5784 58648 1013 Fail 0.0013 5435 56595 1041 Fail 0.0014 5110 54777 1071 Fail 0.0014 4808 53001 1102 Fail 0.0014 4532 51333 1132 Fail 0.0015 4256 49665 1166 Fail 0.0015 4017 47996 1194 Fail 0.0015 3784 46478 1228 Fail 0.0016 3546 45023 1269 Fail 0.0016 3339 43590 1305 Fail 0.0016 3138 42179 1344 Fail 0.0017 2954 40895 1384 Fail 0.0017 2785 39569 1420 Fail 0.0017 2599 38393 1477 Fail 0.0018 2447 37217 1520 Fail 0.0018 2308 36062 1562 Fail 0.0018 2162 34949 1616 Fail 0.0019 2028 33987 1675 Fail 0.0019 1898 32960 1736 Fail 0.0019 1790 31976 1786 Fail 0.0020 1688 30971 1834 Fail 0.0020 1590 30094 1892 Fail 0.0020 1483 29217 1970 Fail 0.0021 1382 28383 2053 Fail 0.0021 1292 27570 2133 Fail 0.0021 1217 26693 2193 Fail 0.0022 1155 25923 2244 Fail 0.0022 1098 25217 2296 Fail 0.0022 1048 24469 2334 Fail 0.0023 997 23742 2381 Fail 0.0023 930 23079 2481 Fail 0.0023 883 22458 2543 Fail 0.0024 838 21817 2603 Fail 0.0024 789 21162 2682 Fail 0.0024 743 20572 2768 Fail 0.0025 713 19971 2800 Fail 0.0025 669 19417 2902 Fail 0.0025 630 18867 2994 Fail 0.0025 596 18388 3085 Fail Dulay TDA #3 4/30/2025 7:16:13 AM Page 12 0.0026 565 17887 3165 Fail 0.0026 539 17387 3225 Fail 0.0026 496 16904 3408 Fail 0.0027 473 16467 3481 Fail 0.0027 434 16050 3698 Fail 0.0027 401 15618 3894 Fail 0.0028 366 15210 4155 Fail 0.0028 348 14840 4264 Fail 0.0028 323 14427 4466 Fail 0.0029 296 14033 4740 Fail 0.0029 272 13676 5027 Fail 0.0029 256 13297 5194 Fail 0.0030 235 12966 5517 Fail 0.0030 217 12630 5820 Fail 0.0030 195 12314 6314 Fail 0.0031 180 11969 6649 Fail 0.0031 158 11659 7379 Fail 0.0031 145 11383 7850 Fail 0.0032 129 11101 8605 Fail 0.0032 119 10808 9082 Fail 0.0032 109 10545 9674 Fail 0.0033 97 10277 10594 Fail 0.0033 91 10029 11020 Fail 0.0033 82 9809 11962 Fail 0.0034 76 9559 12577 Fail 0.0034 69 9317 13502 Fail 0.0034 61 9077 14880 Fail 0.0035 54 8844 16377 Fail 0.0035 48 8660 18041 Fail 0.0035 41 8487 20700 Fail 0.0036 38 8286 21805 Fail 0.0036 33 8085 24500 Fail 0.0036 27 7905 29277 Fail 0.0037 22 7730 35136 Fail 0.0037 21 7550 35952 Fail 0.0037 20 7368 36840 Fail 0.0038 19 7221 38005 Fail 0.0038 17 7045 41441 Fail 0.0038 13 6866 52815 Fail 0.0039 12 6699 55825 Fail 0.0039 8 6524 81550 Fail 0.0039 4 6372 159300 Fail 0.0039 3 6224 207466 Fail 0.0040 3 6079 202633 Fail 0.0040 3 5935 197833 Fail 0.0040 3 5784 192800 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. Dulay TDA #3 4/30/2025 7:16:13 AM Page 13 Water Quality Water Quality BMP Flow and Volume for POC #1 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. Dulay TDA #3 4/30/2025 7:16:13 AM Page 14 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. Dulay TDA #3 4/30/2025 7:16:13 AM Page 15 Appendix Predeveloped Schematic Dulay TDA #3 4/30/2025 7:16:13 AM Page 16 Mitigated Schematic Dulay TDA #3 4/30/2025 7:16:14 AM Page 17 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 Dulay TDA #3.wdm MESSU 25 PreDulay TDA #3.MES 27 PreDulay TDA #3.L61 28 PreDulay TDA #3.L62 30 POCDulay TDA #31.dat END FILES OPN SEQUENCE INGRP INDELT 00:15 PERLND 10 COPY 501 DISPLY 1 END INGRP END OPN SEQUENCE DISPLY DISPLY-INFO1 # - #<----------Title----------->***TRAN PIVL DIG1 FIL1 PYR DIG2 FIL2 YRND 1 Existing TDA #3 - Frontag MAX 1 2 30 9 END DISPLY-INFO1 END DISPLY COPY TIMESERIES # - # NPT NMN *** 1 1 1 501 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 *** 10 C, Forest, Flat 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 *** 10 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 ********* 10 0 0 4 0 0 0 0 0 0 0 0 0 1 9 END PRINT-INFO Dulay TDA #3 4/30/2025 7:16:14 AM Page 18 PWAT-PARM1 <PLS > PWATER variable monthly parameter value flags *** # - # CSNO RTOP UZFG VCS VUZ VNN VIFW VIRC VLE INFC HWT *** 10 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 10 0 4.5 0.08 400 0.05 0.5 0.996 END PWAT-PARM2 PWAT-PARM3 <PLS > PWATER input info: Part 3 *** # - # ***PETMAX PETMIN INFEXP INFILD DEEPFR BASETP AGWETP 10 0 0 2 2 0 0 0 END PWAT-PARM3 PWAT-PARM4 <PLS > PWATER input info: Part 4 *** # - # CEPSC UZSN NSUR INTFW IRC LZETP *** 10 0.2 0.5 0.35 6 0.5 0.7 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 10 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 *** END GEN-INFO *** Section IWATER*** ACTIVITY <PLS > ************* Active Sections ***************************** # - # ATMP SNOW IWAT SLD IWG IQAL *** END ACTIVITY PRINT-INFO <ILS > ******** Print-flags ******** PIVL PYR # - # ATMP SNOW IWAT SLD IWG IQAL ********* END PRINT-INFO IWAT-PARM1 <PLS > IWATER variable monthly parameter value flags *** # - # CSNO RTOP VRS VNN RTLI *** END IWAT-PARM1 IWAT-PARM2 <PLS > IWATER input info: Part 2 *** # - # *** LSUR SLSUR NSUR RETSC END IWAT-PARM2 IWAT-PARM3 <PLS > IWATER input info: Part 3 *** # - # ***PETMAX PETMIN END IWAT-PARM3 IWAT-STATE1 <PLS > *** Initial conditions at start of simulation # - # *** RETS SURS END IWAT-STATE1 Dulay TDA #3 4/30/2025 7:16:14 AM Page 19 END IMPLND SCHEMATIC <-Source-> <--Area--> <-Target-> MBLK *** <Name> # <-factor-> <Name> # Tbl# *** Existing TDA #3 - Frontage *** PERLND 10 0.0562 COPY 501 12 PERLND 10 0.0562 COPY 501 13 ******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 <-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 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 Dulay TDA #3 4/30/2025 7:16:14 AM Page 20 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 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 END MASS-LINK END RUN Dulay TDA #3 4/30/2025 7:16:14 AM Page 21 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 Dulay TDA #3.wdm MESSU 25 MitDulay TDA #3.MES 27 MitDulay TDA #3.L61 28 MitDulay TDA #3.L62 30 POCDulay TDA #31.dat END FILES OPN SEQUENCE INGRP INDELT 00:15 PERLND 16 IMPLND 1 IMPLND 5 IMPLND 8 COPY 501 DISPLY 1 END INGRP END OPN SEQUENCE DISPLY DISPLY-INFO1 # - #<----------Title----------->***TRAN PIVL DIG1 FIL1 PYR DIG2 FIL2 YRND 1 Frontage - TDA #3 MAX 1 2 30 9 END DISPLY-INFO1 END DISPLY COPY TIMESERIES # - # NPT NMN *** 1 1 1 501 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 *** 16 C, Lawn, Flat 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 *** 16 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 ********* Dulay TDA #3 4/30/2025 7:16:14 AM Page 22 16 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 *** 16 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 16 0 4.5 0.03 400 0.05 0.5 0.996 END PWAT-PARM2 PWAT-PARM3 <PLS > PWATER input info: Part 3 *** # - # ***PETMAX PETMIN INFEXP INFILD DEEPFR BASETP AGWETP 16 0 0 2 2 0 0 0 END PWAT-PARM3 PWAT-PARM4 <PLS > PWATER input info: Part 4 *** # - # CEPSC UZSN NSUR INTFW IRC LZETP *** 16 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 16 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 *** 1 ROADS/FLAT 1 1 1 27 0 5 DRIVEWAYS/FLAT 1 1 1 27 0 8 SIDEWALKS/FLAT 1 1 1 27 0 END GEN-INFO *** Section IWATER*** ACTIVITY <PLS > ************* Active Sections ***************************** # - # ATMP SNOW IWAT SLD IWG IQAL *** 1 0 0 1 0 0 0 5 0 0 1 0 0 0 8 0 0 1 0 0 0 END ACTIVITY PRINT-INFO <ILS > ******** Print-flags ******** PIVL PYR # - # ATMP SNOW IWAT SLD IWG IQAL ********* 1 0 0 4 0 0 4 1 9 5 0 0 4 0 0 0 1 9 8 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 *** 1 0 0 0 0 0 5 0 0 0 0 0 8 0 0 0 0 0 END IWAT-PARM1 Dulay TDA #3 4/30/2025 7:16:14 AM Page 23 IWAT-PARM2 <PLS > IWATER input info: Part 2 *** # - # *** LSUR SLSUR NSUR RETSC 1 400 0.01 0.1 0.1 5 400 0.01 0.1 0.1 8 400 0.01 0.1 0.1 END IWAT-PARM2 IWAT-PARM3 <PLS > IWATER input info: Part 3 *** # - # ***PETMAX PETMIN 1 0 0 5 0 0 8 0 0 END IWAT-PARM3 IWAT-STATE1 <PLS > *** Initial conditions at start of simulation # - # *** RETS SURS 1 0 0 5 0 0 8 0 0 END IWAT-STATE1 END IMPLND SCHEMATIC <-Source-> <--Area--> <-Target-> MBLK *** <Name> # <-factor-> <Name> # Tbl# *** Frontage - TDA #3*** PERLND 16 0.02921 COPY 501 12 PERLND 16 0.02921 COPY 501 13 IMPLND 1 0.00519 COPY 501 15 IMPLND 5 0.0057 COPY 501 15 IMPLND 8 0.0161 COPY 501 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 <-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 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 *** Dulay TDA #3 4/30/2025 7:16:14 AM Page 24 # - # 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 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 Dulay TDA #3 4/30/2025 7:16:14 AM Page 25 Predeveloped HSPF Message File Dulay TDA #3 4/30/2025 7:16:14 AM Page 26 Mitigated HSPF Message File Dulay TDA #3 4/30/2025 7:16:14 AM Page 27 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 APPENDIX E: STORMWATER POLLUTION PREVENTION PLAN (TO BE PROVIDED AT TIME OF CIVIL CONSTRUCTION APPLICATION) APPENDIX F: OPERATIONS AND MAINTENANCE MANUAL (TO BE PROVIDED AT TIME OF CIVIL CONSTRUCTION APPLICATION) APPENDIX G: BOND QUANTITIES WORKSHEET (TO BE PROVIDED AT TIME OF CIVIL CONSTRUCTION APPLICATION)