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RS_Prelim TIR_241008_v1
Preliminary TECHNICAL INFORMATION REPORT FOR Poppy Court Short Plat CITY OF RENTON, WASHINGTON Prepared by: Andrew Oh, E.I.T Approved by: Sheri H. Murata, P.E. Date: October 8, 2024 Core No.: 22161 10/8/24 Core Design, Inc. Poppy Court Short Plat i Poppy Court Short Plat Table of Contents 1. PROJECT OVERVIEW .......................................................................................................................... 1-1 Figure 1-1 Vicinity Map ..................................................................................................................... 1-1 2. CONDITIONS AND REQUIREMENTS SUMMARY ................................................................................ 2-1 2.1 Core Requirements .......................................................................................................................... 2-2 2.1.1 Core Requirement #1: Discharge at the Natural Location ...................................................... 2-2 2.1.2 Core Requirement #2: Offsite Analysis .................................................................................... 2-2 2.1.3 Core Requirement #3: Flow Control......................................................................................... 2-2 2.1.4 Core Requirement #4: Conveyance System ............................................................................. 2-2 2.1.5 Core Requirements #5: Erosion and Sediment Control ........................................................... 2-2 2.1.6 Core Requirement #6: Maintenance and Operations .............................................................. 2-2 2.1.7 Core Requirement #7: Financial Guarantees and Liability ....................................................... 2-2 2.1.8 Core Requirement #8: Water Quality ...................................................................................... 2-2 2.1.9 Core Requirement #9: On-Site BMPs ....................................................................................... 2-2 2.2 Special Requirements ...................................................................................................................... 2-2 2.2.1 Special Requirement #1: Other Adopted Area Specific Requirements .................................... 2-2 2.2.2 Special Requirement #2: Flood Hazard Area Delineation ........................................................ 2-2 2.2.3 Special Requirement #3: Flood Protection Facilities ................................................................ 2-2 2.2.4 Special Requirement #4: Source Control ................................................................................. 2-3 2.2.5 Special Requirement #5: Oil Control ........................................................................................ 2-3 2.2.6 Special Requirement #6: Aquifer Protection Area ................................................................... 2-3 3. OFFSITE ANALYSIS ............................................................................................................................. 3-1 Task 1 Study Area Definition and Maps ................................................................................................. 3-1 Task 2 Resource Review ........................................................................................................................ 3-1 Sensitive Areas Folio.......................................................................................................................... 3-1 Task 3 Field Investigation ...................................................................................................................... 3-1 Task 4 Drainage System Description and Problem Description ............................................................ 3-1 4. FLOW CONTROL AND WATER QUALITY ANALYSIS ............................................................................ 4-1 4.1 Predeveloped Site Hydrology .......................................................................................................... 4-1 Table 4-1 Predeveloped Conditions .................................................................................................. 4-1 Core Design, Inc. Poppy Court Short Plat ii 4.2 Developed Site Hydrology ............................................................................................................... 4-2 Table 4-2 Developed Conditions ....................................................................................................... 4-2 4.4 BMP Feasibility ................................................................................................................................ 4-5 4.5 Water Quality Treatment Analysis and Design ................................................................................ 4-7 Table 4-3 PGIS Areas ......................................................................................................................... 4-7 5. DOWNSTREAM CONVEYANCE SYSTEM CAPACITY ANALYSIS ............................................................ 5-1 6. SPECIAL REPORTS AND STUDIES ....................................................................................................... 6-1 7. OTHER PERMITS ................................................................................................................................ 7-1 8. ESC ANALYSIS AND DESIGN ............................................................................................................... 8-1 9. BOND QUANTITIES, FACILITY SUMMARIES, AND DECLARATION OF COVENANT ............................. 9-1 10. OPERATIONS AND MAINTENANCE .................................................................................................. 10-1 Appendix A ............................................................................................................................................... 10-2 Core Design, Inc. Poppy Court Short Plat Page 1-1 1. PROJECT OVERVIEW The proposed project is located at 805 Hoquiam Avenue, Renton, WA 98059. See Vicinity Map below. Figure 1-1 Vicinity Map The site is composed of a single parcel number: 102305-9003 with an area of approximately 0.46 acres. The total site area, including frontage, is approximately 0.54 acres. The site is bordered by Hoquiam Avenue NE to the east and NE 8th Street to the south. The site was previously developed with a single-story residential home. The site generally slopes west to east. Proposed development of the property will include the demolition of all hard surfaces located on site and the construction of two single family residences, shared driveway, utilities, and frontage improvements. The subject project’s drainage facilities were designed using the guidelines and requirements established in Section 1.2.3.1 of the 2022 City of Renton Surface Water Design Manual (RSWDM). The Flow Control Duration Standard matching forested site conditions is required for this project. KING COUNTY, WASHINGTON, SURFACE WATER DESIGN MANUAL TECHNICAL INFORMATION REPORT (TIR) WORKSHEET Part 1 PROJECT OWNER AND PROJECT ENGINEER Part 2 PROJECT LOCATION AND DESCRIPTION Project Owner ___________________________ Phone _________________________________ Address _______________________________ _______________________________________ Project Engineer _________________________ Company ______________________________ Phone _________________________________ Project Name _________________________ DPER Permit # ________________________ Location Township ______________ Range ________________ Section ________________ Site Address __________________________ _____________________________________ Part 3 TYPE OF PERMIT APPLICATION Part 4 OTHER REVIEWS AND PERMITS Landuse (e.g.,Subdivision / Short Subd. / UPD) Building (e.g.,M/F / Commercial / SFR) Clearing and Grading Right-of-Way Use Other _______________________ DFW HPA COE 404 DOE Dam Safety FEMA Floodplain COE Wetlands Other ________ Shoreline Management Structural Rockery/Vault/_____ ESA Section 7 Part 5 PLAN AND REPORT INFORMATION Technical Information Report Site Improvement Plan (Engr. Plans) T ype of Drainage Review (check one): Date (include revision dates): Date of Final: Full Targeted Simplified Large Project Directed __________________ __________________ __________________ Plan Type (check one): Date (include revision dates): Date of Final: Full Modified Simplified __________________ __________________ __________________ Part 6 SWDM ADJUSTMENT APPROVALS Type (circle one): Standard / Experimental / Blanket Description: (include conditions in TIR Section 2) ____________________________________________________________________________________ ____________________________________________________________________________________ ____________________________________________________________________________________ Approved Adjustment No. ______________________ Date of Approval: ______________________ 2016 Surface Water Design Manual 4/24/2016 1 (NA) Tuscany Construction 206-714-6707 PO Box 2170 Bellevue, WA 98056 Sheri H. Murata Core Design 425-885-7877 Poppy Court Short Plat XXX 23 N 5 E 10 805 Hoquiam Avenue NE Renton, WA 98059 3/13/14 3/13/24 KING COUNTY, WASHINGTON, SURFACE WATER DESIGN MANUAL TECHNICAL INFORMATION REPORT (TIR) WORKSHEET Part 7 MONITORING REQUIREMENTS Monitoring Required: Yes / No Start Date: _______________________ Completion Date: _______________________ Describe: _________________________________ _________________________________________ _________________________________________ Re: KCSWDM Adjustment No. ________________ Part 8 SITE COMMUNITY AND DRAINAGE BASIN Community Plan : ____________________________________________________________________ Special District Overlays: ______________________________________________________________ Drainage Basin: _____________________________________________________________________ Stormwater Requirements: ____________________________________________________________ Part 9 ONSITE AND ADJACENT SENSITIVE AREAS River/Stream ________________________ Lake ______________________________ Wetlands ____________________________ Closed Depression ____________________ Floodplain ___________________________ Other _______________________________ _______________________________ Steep Slope __________________________ Erosion Hazard _______________________ Landslide Hazard ______________________ Coal Mine Hazard ______________________ Seismic Hazard _______________________ Habitat Protection ______________________ _____________________________________ Part 10 SOILS Soil Type _________________ _________________ _________________ _________________ Slopes _________________ _________________ _________________ _________________ Erosion Potential _________________ _________________ _________________ _________________ High Groundwater Table (within 5 feet) Other ________________________________ Sole Source Aquifer Seeps/Springs Additional Sheets Attached 2016 Surface Water Design Manual 4/24/2016 2 NA NA Lower Cedar River 2021 KCSWDM as amended by the city of Renton Till 0-10%Low KING COUNTY, WASHINGTON, SURFACE WATER DESIGN MANUAL TECHNICAL INFORMATION REPORT (TIR) WORKSHEET Part 11 DRAINAGE DESIGN LIMITATIONS REFERENCE Core 2 – Offsite Analysis_________________ Sensitive/Critical Areas__________________ SEPA________________________________ LID Infeasibility________________________ Other________________________________ _____________________________________ LIMITATION / SITE CONSTRAINT _______________________________________ _______________________________________ _______________________________________ _______________________________________ _______________________________________ _______________________________________ Additional Sheets Attached Part 12 TIR SUMMARY SHEET (provide one TIR Summary Sheet per Threshold Discharge Area) Threshold Discharge Area: (name or description) Core Requirements (all 8 apply): Discharge at Natural Location Number of Natural Discharge Locations: Offsite Analysis Level: 1 / 2 / 3 dated:__________________ Flow Control (include facility summary sheet) Level: 1 / 2 / 3 or Exemption Number ____________ Flow Control BMPs _______________________________ Conveyance System Spill containment located at: _________________________ Erosion and Sediment Control / Construction Stormwater Pollution Prevention CSWPP/CESCL/ESC Site Supervisor: _____________________ Contact Phone: _________________________ After Hours Phone: _________________________ Maintenance and Operation Responsibility (circle one): Private / Public If Private, Maintenance Log Required: Yes / No Financial Guarantees and Liability Provided: Yes / No Water Quality (include facility summary sheet) Type (circle one): Basic / Sens. Lake / Enhanced Basic / Bog or Exemption No. ______________________ Landscape Management Plan: Yes / No Special Requirements (as applicable): Area Specific Drainage Requirements Type: CDA / SDO / MDP / BP / LMP / Shared Fac. / None Name: ________________________ Floodplain/Floodway Delineation Type (circle one): Major / Minor / Exemption / None 100-year Base Flood Elevation (or range): ______________ Datum: Flood Protection Facilities Describe: 2016 Surface Water Design Manual 4/24/2016 3 Soils not suitable for infiltration Onsite Basin NA TBD Does not trigger any WQ Thresholds 1 KING COUNTY, WASHINGTON, SURFACE WATER DESIGN MANUAL TECHNICAL INFORMATION REPORT (TIR) WORKSHEET Part 12 TIR SUMMARY SHEET (provide one TIR Summary Sheet per Threshold Discharge Area) Source Control (comm ercial / industrial land use) Describe land use: Describe any structural controls: Oil Control High-use Site: Yes / No Treatment BMP: ________________________________ Maintenance Agreement: Yes / No with whom? ____________________________________ Other Drainage Structures Describe: Part 13 EROSION AND SEDIMENT CONTROL REQUIREMENTS MINIMUM ESC REQUIREMENTS DURING CONSTRUCTION Clearing Limits Cover Measures Perimeter Protection Traffic Area Stabilization Sediment Retention Surface Water Collection Dewatering Control Dust Control Flow Control Protection of Flow Control BMP Facilities (existing and proposed) Maintain BMPs / Manage Project MINIMUM ESC REQUIREMENTS AFTER CONSTRUCTION Stabilize exposed surfaces Remove and restore Temporary ESC Facilities Clean and remove all silt and debris, ensure operation of Permanent Facilities, restore operation of Flow Control BMP Facilities as necessary Flag limits of SAO and open space preservation areas Other ______________________ Part 14 STORMWATER FACILITY DESCRIPTIONS (Note: Include Facility Summary and Sketch) Flow Control Type/Description Water Quality Type/Description Detention Infiltration Regional Facility Shared Facility Flow Control BMPs Other ________________ ________________ ________________ ________________ ________________ ________________ Vegetated Flowpath Wetpool Filtration Oil Control Spill Control Flow Control BMPs Other ________________ ________________ ________________ ________________ ________________ ________________ ________________ 2016 Surface Water Design Manual 4/24/2016 4 R-Tank KING COUNTY, WASHINGTON, SURFACE WATER DESIGN MANUAL TECHNICAL INFORMATION REPORT (TIR) WORKSHEET Part 15 EASEMENTS/TRACTS Part 16 STRUCTURAL ANALYSIS Drainage Easement Covenant Native Growth Protection Covenant Tract Other ___________________________ Cast in Place Vault Retaining Wall Rockery > 4’ High Structural on Steep Slope Other ______________________________ Part 17 SIGNATURE OF PROFESSIONAL ENGINEER I, or a civil engineer under my supervision, have visited the site. Actual site conditions as observed were incorporated into this worksheet and the attached Technical Information Report. To the best of my knowledge the information provided here is accurate. Signed/Date 2016 Surface Water Design Manual 4/24/2016 5 3/13/24 Core Design, Inc. Poppy Court Short Plat Page 2-1 2. CONDITIONS AND REQUIREMENTS SUMMARY The proposed project is classified as requiring “Simplified Drainage Review” per Page 1-8 Definitions given in the 2022 RSWDM. Therefore, all nine core requirements and six special requirements will be addressed per Section 1.2 and 1.3 of the 2022 RSWDM. Core Design, Inc. Poppy Court Short Plat Page 2-2 2.1 Core Requirements 2.1.1 Core Requirement #1: Discharge at the Natural Location The existing site drainage exits the site via sheet flow through the southeast boundary and enters the existing storm system at the southwest corner of the NE 8th Street and Hoquiam Avenue NE intersection. 2.1.2 Core Requirement #2: Offsite Analysis See Section 3 of this Report for the downstream drainage path. 2.1.3 Core Requirement #3: Flow Control The project will provide flow control as it proposes greater than 5,000 SF of impervious area. See Section 4 of this report for a detailed Flow Control Analysis. 2.1.4 Core Requirement #4: Conveyance System Conveyance Calculations will be provided in Section 5 with final engineering. 2.1.5 Core Requirements #5: Erosion and Sediment Control Erosion and sediment control will be provided through catch basin protection, silt fencing, tree protection fencing, and an existing driveway to be used for construction access entrance. See Section 8 of this report for erosion and sediment control analysis and design. 2.1.6 Core Requirement #6: Maintenance and Operations An Operations and Maintenance Manual will be provided in Section 10. 2.1.7 Core Requirement #7: Financial Guarantees and Liability A bond quantities worksheet will be provided in Section 9 with final engineering. 2.1.8 Core Requirement #8: Water Quality The project is exempt from water quality. See Section 4.5 for details. 2.1.9 Core Requirement #9: On-Site BMPs The project site is less than 22,000 square feet; this site falls under Small Lot BMP Requirements. See Section 4.4 of this report for discussion on how this Core Requirement is addressed. 2.2 Special Requirements 2.2.1 Special Requirement #1: Other Adopted Area Specific Requirements There are no known additional requirements for the subject project. 2.2.2 Special Requirement #2: Flood Hazard Area Delineation Not applicable since the project does not contain nor is adjacent to a flood hazard area. 2.2.3 Special Requirement #3: Flood Protection Facilities Not applicable since the project does not rely on an existing flood protection facility or plans to modify or construct a new flood protection facility. Core Design, Inc. Poppy Court Short Plat Page 2-3 2.2.4 Special Requirement #4: Source Control This special requirement does not apply as the project does not require a commercial site development permit. 2.2.5 Special Requirement #5: Oil Control Not applicable since the project is not a high use site. The expected average daily traffic is less than 100 vehicles per 1,000 square feet of gross building area. 2.2.6 Special Requirement #6: Aquifer Protection Area Not applicable since the project is not in an Aquifer Protection Area. Core Design, Inc. Poppy Court Short Plat Page 3-1 3. OFFSITE ANALYSIS Task 1 Study Area Definition and Maps The proposed project is located within the Lower Cedar River drainage basin. Task 2 Resource Review Sensitive Areas Folio Renton GIS was reviewed for sensitive areas. The proposed project site does not fall within the following sensitive areas: coal mines, erosion hazard, flood hazard, floodway, channel migration zone, landslide, seismic hazard, regulated stream, wetland, or wellhead protection. Task 3 Field Investigation There is negligible upstream tributary area. Downstream Drainage Path Runoff from the site sheet flows southeast onto Hoquiam Avenue NE and into the city’s existing conveyance system. At this point the runoff flows south along Hoquiam Avenue NE through a series of pipes for a ¼ mile. This would conclude the downstream analysis. The runoff will eventually enter the Maplewood Creek and into the Cedar River. See the following page for a downstream route exhibit. Task 4 Drainage System Description and Problem Description Drainage complaints were researched within a quarter mile of the project site using the City of Renton’s GIS Map. There were no drainage complaints found. 4,514 376 City of Renton Print map Template This map is a user generated static output from an Internet mapping site and is for reference only. Data layers that appear on this map may or may not be accurate, current, or otherwise reliable. None 11/14/2022 Legend 2560128 THIS MAP IS NOT TO BE USED FOR NAVIGATION Feet Notes 256 WGS_1984_Web_Mercator_Auxiliary_Sphere Information Technology - GIS RentonMapSupport@Rentonwa.gov City and County Labels Addresses Parcels City and County Boundary <all other values> Renton Network Structures Access Riser Inlet Manhole Utility Vault Clean Out Unknown Control Structure Pump Station Discharge Point Water Quality Detention Facilities Pond Tank Vault Bioswale Wetland Other Surface Water Main Culvert SITE 1/4 MILE DOWNSTREAM Core Design, Inc. Poppy Court Short Plat Page 4-1 4. FLOW CONTROL AND WATER QUALITY ANALYSIS The project site is proposing greater than 5,000 SF of new plus replaced impervious surface. A water quality treatment facility is not proposed as the project does not trigger any requirements for water quality treatment as delineated in Section 4.5 of this report. 4.1 Predeveloped Site Hydrology The site was previously developed with a single-story residential home. The rest of the site was left as landscaping and forest. The total disturbed area of the project site is approximately 0.53 acres and includes the site as well as frontage improvements. See Figure 4-1 on the following pages for the predeveloped conditions exhibit. The impervious area in the predeveloped conditions is from the existing residence, driveway and sheds. The predeveloped areas are shown in the table below. Table 4-1 Predeveloped Conditions Ground Cover Area (SF) Area (Acres) Impervious 400 0.01 Forest 22,820 0.52 Total Basin 23,220 0.53 Core Design, Inc. Poppy Court Short Plat Page 4-2 4.2 Developed Site Hydrology The developed site will include the demolition of impervious surfaces that will be located on site and the construction of two single family residences, shared driveway, utilities, and frontage improvements along Hoquiam Avenue NE. The impervious area per lot was determined using the existing zoning of the site (R-8) and the city’s municipal code. The maximum impervious coverage for a zoning of R-8 is 65% of the lot. The impervious area per lot is based on max per zoning or 4,000 SF whichever is less. The project is proposing a shared access driveway for both lots. The ROW will require 1,978 SF of new/replaced impervious with 400 SF of existing impervious that is being overlayed. The developed conditions are shown in the table below. See Figure 4-2 on the following page for the developed conditions exhibit. Table 4-2 Developed Conditions Ground Cover Total Area (SF) New/Replaced Impervious (SF) Ex. Impervious (SF) Pervious (SF) Lot 1 8,960 4,000 0 4,960 Lot 2 7,175 4,000 0 3,175 Tract A 4,051 1,805 0 2,246 Right of Way 3,034 1,978 400 656 Total (SF) 23,220 11,783 400 11,037 Total (Acres) 0.53 0.27 0.01 0.25 4.3 Flow Control Analysis Using the predeveloped and developed areas above, a 92’ x 20’ R-Tank with 2.50’ of live storage was sized. The vault requires 4,600 CF for sufficient capacity and will be designed to provide 4,600 CF. Below are the R-Tank details and flow rates. The full WWHM report can be found in Appendix A. Core Design, Inc. Poppy Court Short Plat Page 4-3 NE. 8TH STREET HO Q U I A M A V E . N E . DESIGN E N G I N E E R I N G P L A N N I N G S U R V E Y I N G 12100 NE 195th St, Suite 300 Bothell, Washington 98011 425.885.7877 Fax 425.885.7963 22161 NE. 8TH STREET HO Q U I A M A V E . N E . 12 0 ' 12 0 ' 60' 12 0 ' 1 60'75' 135' 2 12 0 ' 75' 12 0 ' 30 ' TRACT A 60' 30 ' DESIGN E N G I N E E R I N G P L A N N I N G S U R V E Y I N G 12100 NE 195th St, Suite 300 Bothell, Washington 98011 425.885.7877 Fax 425.885.7963 22161 Core Design, Inc. Poppy Court Short Plat Page 4-5 4.4 BMP Feasibility Per Section 1.2.9.1 in the RSWDM, projects subject to Core Requirement #9 must apply on-site BMPs to either supplement the flow mitigation provided by required flow control facilities or provide flow mitigation where flow control facilities are not required. On-site BMPs must be implemented per the requirements and approach detailed in Sections 1.2.9.2 and 1.2.9.3 for individual lots and subdivisions or road improvement projects, respectively. The Section applicable to this project is Section 1.2.9.2. Per Section 1.2.9.2, projects on individual sites/lots, on-site BMPs must be selected and applied according to the individual lot BMP requirements. The project site is smaller than 22,000 square feet and follows requirements specified in Section 1.2.9.2.1 Small Lot BMP Requirements of the 2017 RSWDM. 1. The feasibility and applicability of full dispersion as detailed in Appendix C, Section C.2.1 must be evaluated for all target impervious surfaces. If feasible and applicable, full dispersion must be implemented as part of the proposed project. Typically, small lot full dispersion will be applicable only in subdivisions where enough forest was preserved by tract, easement, or covenant to meet the minimum requirements for full dispersion in Appendix C, Section C.2.1.1 Full dispersion is not feasible due to non-existent native forested area. 2. Where full dispersion of target impervious roof areas is not feasible or applicable, or will cause flooding or erosion impacts, the feasibility and applicability of full infiltration as detailed in Appendix C, Section C.2.2 must be evaluated (note, this will require a soils report for the site/lot). If feasible and applicable, full infiltration of roof runoff must be implemented as part of the proposed project. As per the Geotechnical evaluation by Cobalt Geosciences dated October 13, 2022, “Infiltration is not feasible due to the presence of extensive fill and dense glacial till.” 3. All target impervious surfaces not mitigated by Requirements 1 and 2 above, must be mitigated to the maximum extent feasible using one or more BMPs from the following list. Use of a given BMP is subject to evaluation of its feasibility and applicability as detailed in Appendix C. Feasible BMPs are required to be implemented. The BMPs listed below may be located anywhere on the site/lot subject to the limitations and design specifications for each BMP. These BMPs must be implemented as part of the proposed project. • Full Infiltration per Appendix C, Section C.2.2, or per Section 5.2, whichever is applicable As per the Geotechnical evaluation by Cobalt Geosciences dated October 13, 2022, “Infiltration is not feasible due to the presence of extensive fill and dense glacial till.” • Limited Infiltration per Appendix C, Section C.2.3, As per the Geotechnical evaluation by Cobalt Geosciences dated October 13, 2022, “Infiltration is not feasible due to the presence of extensive fill and dense glacial till.” Core Design, Inc. Poppy Court Short Plat Page 4-6 • Rain Gardens/Bioretention per Appendix C, Section C.2.6 and C.2.12 12 As per the Geotechnical evaluation by Cobalt Geosciences dated October 13, 2022, “Infiltration is not feasible due to the presence of extensive fill and dense glacial till.” • Permeable Pavement per Appendix C, Section C.2.7 As per the Geotechnical evaluation by Cobalt Geosciences dated October 13, 2022, “Infiltration is not feasible due to the presence of extensive fill and dense glacial till.” 4. All target impervious surfaces not mitigated by Requirements 1, 2 and 3 above, must be mitigated to the maximum extent feasible using the Basic Dispersion BMP described below. Use of Basic Dispersion is subject to evaluation of its feasibility and applicability as detailed in Appendix C. Feasible BMPs are required to be implemented. Basic Dispersion BMPs may be located anywhere on the site/lot subject to the limitations and design specifications cited in Appendix C. The BMP must be implemented as part of the proposed project. • Basic Dispersion per Appendix C, Section C.2.4, Given the setbacks and flow path requirements basic dispersion will be evaluated for Lot 2 with the building permit. 5. BMPs must be implemented, at minimum, for an impervious area equal to at least 10% of the site/lot for site/lot sizes up to 11,000 square feet and at least 20% of the site/lot for site/lot sizes between 11,000 and 22,000 square feet. For projects located in Zone 1 of the Aquifer Protection Area, these impervious area amounts must be doubled. Doubling of the minimum impervious area required for BMP implementation in Zone 1 of the Aquifer Protection Area is not required for projects located within 200 feet of a steep slope hazard area, landslide hazard, or erosion hazard area. If these minimum areas are not mitigated using feasible BMPs from Requirements 1, 2, 3, and 4 above, one or more BMPs from the following list are required to be implemented to achieve compliance. These BMPs must be implemented as part of the proposed project. • Reduced Impervious Surface Credit per Appendix C, Section C.2.9 This BMP will be evaluated with the building permit. • Native Growth Retention Credit per Appendix C, Section C.2.10. This BMP is not applicable to the project since there is no forested area to retain. 6. The soil moisture holding capacity of new pervious surfaces (target pervious surfaces) must be protected in accordance with the soil amendment BMP as detailed in Appendix C, Section C.2.13. Soil amendment will be incorporated for disturbed areas not covered with hard surfaces. Core Design, Inc. Poppy Court Short Plat Page 4-7 7. Any proposed connection of roof downspouts to the local drainage system must be via a perforated pipe connection as detailed in Appendix C, Section C.2.11. One perforated pipe connection will be provided prior to connection to the local drainage system. 4.5 Water Quality Treatment Analysis and Design The subject project does not exceed 5,000 SF of PGIS, therefore basic water quality treatment is not required. See Table 4-3 below for an area breakdown. Table 4-3 PGIS Areas Ground Cover Area (SF) Shared Driveway 1,805 ROW PGIS 1,324 Total Area 3,129 Core Design, Inc. Poppy Court Short Plat Page 5-1 5. DOWNSTREAM CONVEYANCE SYSTEM CAPACITY ANALYSIS Conveyance system analysis and design will be addressed during final design. Core Design, Inc. Poppy Court Short Plat Page 6-1 6. SPECIAL REPORTS AND STUDIES The following reports and assessments are provided for reference and informational purposes only. Core Design takes no responsibility or liability for these reports, assessments or designs as they were not completed under the direct supervision of Core Design. ➢ Geotechnical Evaluation October 13, 2022 Cobalt Geosciences, LLC P.O Box 82243 Kenmore, WA 98028 206-331-1097 Core Design, Inc. Poppy Court Short Plat Page 7-1 7. OTHER PERMITS ➢ Building Permits ➢ ROW Use Permit Core Design, Inc. Poppy Court Short Plat Page 8-1 8. ESC ANALYSIS AND DESIGN ESC Plan Analysis and Design (Part A) 1. The site will utilize Appendix D of the 2017 RSWDM for the erosion and sedimentation control design to reduce the discharge of sediment-laden runoff from the site. Clearing limits will be established prior to any earthwork on the project site. Perimeter protection will be provided by silt fencing along the entire perimeter of the site to limit the downstream transport of sediment to the neighboring properties. Dust control, if required, will be provided by a water truck. A Certified Erosion and Sediment Control Lead inspector will be present onsite during earthwork activities. The inspector shall determine frequency of watering of the project site and will authorize and direct any additional erosion and sediment control measures as needed during all construction activities. The plan will be comprised of temporary measures (stabilized construction entrance, silt fence, and inlet protection). 2. Due to the size of the project, no sediment control facilities like a sediment trap are proposed. 3. There are no areas on site with a particularly high susceptibility to erosion. Catch basin inserts are proposed for all proposed stormwater structures. 4. There are no erosion and sediment control recommendations in the infiltration feasibility or arborist reports. 5. The project is proposing to use the existing asphalt driveway as a construction entrance. SWPPS Plan Design (Part B) The following pollution control measures shall be implemented as applicable using activity specific BMPs detailed in Section D.2.2 (and Section D.2.1 as applicable) of Appendix D and the King County Stormwater Pollution Prevention Manual (SPPM). The receiving water for this project is the Cedar River. 1. All pollutants, including waste materials, that occur onsite shall be handled and disposed of in a manner that does not cause contamination of stormwater 2. Chemicals, liquid products, petroleum products, and non-inert wastes are not anticipated on site. 3. Maintenance and repair of heavy equipment and vehicles involving oil changes, hydraulic system drain down, solvent and de-greasing cleaning operations, fuel tank drain down and removal, and other activities which may result in discharge or spillage of pollutants to the ground or into stormwater runoff are not anticipated on site. Core Design, Inc. Poppy Court Short Plat Page 8-2 4. Application of agricultural chemicals, including fertilizers and pesticides, shall be conducted in a manner and at application rates that will not result in loss of chemical to stormwater runoff. Manufacturers' recommendations for application rates and procedures shall be followed. 5. Stormwater discharges shall not cause or contribute to a violation of the water quality standard for pH in the receiving water. Measures shall be used to prevent or treat contamination of stormwater runoff by pH modifying sources. These sources include, but are not limited to: a. bulk cement b. cement kiln dust, fly ash c. new concrete washing and curing waters d. waste streams generated from concrete grinding and sawing e. exposed aggregate processes, and concrete pumping and mixer washout 6. For full compliance with KCC 9.12 Water Quality, the project may need to include measures for the permanent structures and features constructed under other permits. See the Stormwater Pollution Prevention Manual (SPPM) for Activity Sheets describing issues and measures to address them. Common issues include: a. Containment area planning for storage of liquid materials in stationary or portable tanks, storage of solid waste and food wastes including cooking grease, are not anticipated for this site. b. Permanent canopy and paving requirements for permanent outdoor vehicle parking, maintenance and storage areas are not anticipated for this site. Core Design, Inc. Poppy Court Short Plat Page 9-1 9. BOND QUANTITIES, FACILITY SUMMARIES, AND DECLARATION OF COVENANT The bond quantities, facility summary, and declaration of covenant will be addressed during final design. Core Design, Inc. Poppy Court Short Plat Page 10-1 10. OPERATIONS AND MAINTENANCE The operations and maintenance manual will be addressed during final design. Core Design, Inc. Poppy Court Short Plat Page 10-2 Appendix A 6 Custom Soil Resource Report Soil Map 52 6 0 6 0 1 52 6 0 6 0 8 52 6 0 6 1 5 52 6 0 6 2 2 52 6 0 6 2 9 52 6 0 6 3 6 52 6 0 6 4 3 52 6 0 6 0 1 52 6 0 6 0 8 52 6 0 6 1 5 52 6 0 6 2 2 52 6 0 6 2 9 52 6 0 6 3 6 52 6 0 6 4 3 563873 563880 563887 563894 563901 563908 563915 563922 563929 563936 563873 563880 563887 563894 563901 563908 563915 563922 563929 563936 47° 29' 45'' N 12 2 ° 9 ' 7 ' ' W 47° 29' 45'' N 12 2 ° 9 ' 3 ' ' W 47° 29' 44'' N 12 2 ° 9 ' 7 ' ' W 47° 29' 44'' N 12 2 ° 9 ' 3 ' ' W N Map projection: Web Mercator Corner coordinates: WGS84 Edge tics: UTM Zone 10N WGS84 0 15 30 60 90 Feet 0 4 9 18 27 Meters Map Scale: 1:317 if printed on A landscape (11" x 8.5") sheet. Soil Map may not be valid at this scale. 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 17, Aug 23, 2021 Soil map units are labeled (as space allows) for map scales 1:50,000 or larger. Date(s) aerial images were photographed: Jul 25, 2020—Jul 27, 2020 The orthophoto or other base map on which the soil lines were compiled and digitized probably differs from the background imagery displayed on these maps. As a result, some minor shifting of map unit boundaries may be evident. Custom Soil Resource Report 7 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 0.4 100.0% Totals for Area of Interest 0.4 100.0% Map Unit Descriptions The map units delineated on the detailed soil maps in a soil survey represent the soils or miscellaneous areas in the survey area. The map unit descriptions, along with the maps, can be used to determine the composition and properties of a unit. A map unit delineation on a soil map represents an area dominated by one or more major kinds of soil or miscellaneous areas. A map unit is identified and named according to the taxonomic classification of the dominant soils. Within a taxonomic class there are precisely defined limits for the properties of the soils. On the landscape, however, the soils are natural phenomena, and they have the characteristic variability of all natural phenomena. Thus, the range of some observed properties may extend beyond the limits defined for a taxonomic class. Areas of soils of a single taxonomic class rarely, if ever, can be mapped without including areas of other taxonomic classes. Consequently, every map unit is made up of the soils or miscellaneous areas for which it is named and some minor components that belong to taxonomic classes other than those of the major soils. Most minor soils have properties similar to those of the dominant soil or soils in the map unit, and thus they do not affect use and management. These are called noncontrasting, or similar, components. They may or may not be mentioned in a particular map unit description. Other minor components, however, have properties and behavioral characteristics divergent enough to affect use or to require different management. These are called contrasting, or dissimilar, components. They generally are in small areas and could not be mapped separately because of the scale used. Some small areas of strongly contrasting soils or miscellaneous areas are identified by a special symbol on the maps. If included in the database for a given area, the contrasting minor components are identified in the map unit descriptions along with some characteristics of each. A few areas of minor components may not have been observed, and consequently they are not mentioned in the descriptions, especially where the pattern was so complex that it was impractical to make enough observations to identify all the soils and miscellaneous areas on the landscape. The presence of minor components in a map unit in no way diminishes the usefulness or accuracy of the data. The objective of mapping is not to delineate pure taxonomic classes but rather to separate the landscape into landforms or landform segments that have similar use and management requirements. The delineation of such segments on the map provides sufficient information for the development of resource plans. If intensive use of small areas is planned, however, onsite investigation is needed to define and locate the soils and miscellaneous areas. Custom Soil Resource Report 8 WWHM2012 PROJECT REPORT Flow Control Exemption 8/13/2024 9:43:53 AM Page 2 General Model Information WWHM2012 Project Name:Flow Control Exemption Site Name: Site Address: City: Report Date:8/13/2024 Gage:Seatac Data Start:1948/10/01 Data End:2009/09/30 Timestep:15 Minute Precip Scale:1.000 Version Date:2023/01/27 Version:4.2.19 POC Thresholds Low Flow Threshold for POC1:50 Percent of the 2 Year High Flow Threshold for POC1:50 Year Flow Control Exemption 8/13/2024 9:43:53 AM Page 3 Landuse Basin Data Predeveloped Land Use Basin 1 Bypass:No GroundWater:No Pervious Land Use acre C, Forest, Steep 0.52 Pervious Total 0.52 Impervious Land Use acre ROADS MOD 0.01 Impervious Total 0.01 Basin Total 0.53 Flow Control Exemption 8/13/2024 9:43:53 AM Page 4 Mitigated Land Use Basin 1 Bypass:No GroundWater:No Pervious Land Use acre C, Lawn, Flat 0.26 Pervious Total 0.26 Impervious Land Use acre ROADS MOD 0.09 ROOF TOPS FLAT 0.18 Impervious Total 0.27 Basin Total 0.53 Flow Control Exemption 8/13/2024 9:43:53 AM Page 5 Routing Elements Predeveloped Routing Flow Control Exemption 8/13/2024 9:43:53 AM Page 6 Mitigated Routing Vault 1 Width:20 ft. Length:92 ft. Depth:3.5 ft. Discharge Structure Riser Height:2.5 ft. Riser Diameter:18 in. Orifice 1 Diameter:0.625 in.Elevation:0 ft. Orifice 2 Diameter:1.063 in.Elevation:1.54 ft. Orifice 3 Diameter:0.563 in.Elevation:2.34 ft. Element Flows To: Outlet 1 Outlet 2 Vault Hydraulic Table Stage(feet)Area(ac.)Volume(ac-ft.)Discharge(cfs)Infilt(cfs) 0.0000 0.042 0.000 0.000 0.000 0.0389 0.042 0.001 0.002 0.000 0.0778 0.042 0.003 0.003 0.000 0.1167 0.042 0.004 0.003 0.000 0.1556 0.042 0.006 0.004 0.000 0.1944 0.042 0.008 0.004 0.000 0.2333 0.042 0.009 0.005 0.000 0.2722 0.042 0.011 0.005 0.000 0.3111 0.042 0.013 0.005 0.000 0.3500 0.042 0.014 0.006 0.000 0.3889 0.042 0.016 0.006 0.000 0.4278 0.042 0.018 0.006 0.000 0.4667 0.042 0.019 0.007 0.000 0.5056 0.042 0.021 0.007 0.000 0.5444 0.042 0.023 0.007 0.000 0.5833 0.042 0.024 0.008 0.000 0.6222 0.042 0.026 0.008 0.000 0.6611 0.042 0.027 0.008 0.000 0.7000 0.042 0.029 0.008 0.000 0.7389 0.042 0.031 0.009 0.000 0.7778 0.042 0.032 0.009 0.000 0.8167 0.042 0.034 0.009 0.000 0.8556 0.042 0.036 0.009 0.000 0.8944 0.042 0.037 0.010 0.000 0.9333 0.042 0.039 0.010 0.000 0.9722 0.042 0.041 0.010 0.000 1.0111 0.042 0.042 0.010 0.000 1.0500 0.042 0.044 0.010 0.000 1.0889 0.042 0.046 0.011 0.000 1.1278 0.042 0.047 0.011 0.000 1.1667 0.042 0.049 0.011 0.000 1.2056 0.042 0.050 0.011 0.000 1.2444 0.042 0.052 0.011 0.000 1.2833 0.042 0.054 0.012 0.000 1.3222 0.042 0.055 0.012 0.000 1.3611 0.042 0.057 0.012 0.000 1.4000 0.042 0.059 0.012 0.000 1.4389 0.042 0.060 0.012 0.000 Flow Control Exemption 8/13/2024 9:43:53 AM Page 7 1.4778 0.042 0.062 0.012 0.000 1.5167 0.042 0.064 0.013 0.000 1.5556 0.042 0.065 0.017 0.000 1.5944 0.042 0.067 0.020 0.000 1.6333 0.042 0.069 0.022 0.000 1.6722 0.042 0.070 0.024 0.000 1.7111 0.042 0.072 0.026 0.000 1.7500 0.042 0.073 0.028 0.000 1.7889 0.042 0.075 0.029 0.000 1.8278 0.042 0.077 0.030 0.000 1.8667 0.042 0.078 0.032 0.000 1.9056 0.042 0.080 0.033 0.000 1.9444 0.042 0.082 0.034 0.000 1.9833 0.042 0.083 0.035 0.000 2.0222 0.042 0.085 0.036 0.000 2.0611 0.042 0.087 0.037 0.000 2.1000 0.042 0.088 0.038 0.000 2.1389 0.042 0.090 0.039 0.000 2.1778 0.042 0.092 0.040 0.000 2.2167 0.042 0.093 0.041 0.000 2.2556 0.042 0.095 0.041 0.000 2.2944 0.042 0.096 0.042 0.000 2.3333 0.042 0.098 0.043 0.000 2.3722 0.042 0.100 0.045 0.000 2.4111 0.042 0.101 0.047 0.000 2.4500 0.042 0.103 0.048 0.000 2.4889 0.042 0.105 0.049 0.000 2.5278 0.042 0.106 0.124 0.000 2.5667 0.042 0.108 0.325 0.000 2.6056 0.042 0.110 0.597 0.000 2.6444 0.042 0.111 0.923 0.000 2.6833 0.042 0.113 1.291 0.000 2.7222 0.042 0.115 1.693 0.000 2.7611 0.042 0.116 2.118 0.000 2.8000 0.042 0.118 2.559 0.000 2.8389 0.042 0.119 3.004 0.000 2.8778 0.042 0.121 3.446 0.000 2.9167 0.042 0.123 3.873 0.000 2.9556 0.042 0.124 4.277 0.000 2.9944 0.042 0.126 4.651 0.000 3.0333 0.042 0.128 4.987 0.000 3.0722 0.042 0.129 5.281 0.000 3.1111 0.042 0.131 5.533 0.000 3.1500 0.042 0.133 5.742 0.000 3.1889 0.042 0.134 5.915 0.000 3.2278 0.042 0.136 6.061 0.000 3.2667 0.042 0.138 6.272 0.000 3.3056 0.042 0.139 6.428 0.000 3.3444 0.042 0.141 6.581 0.000 3.3833 0.042 0.142 6.730 0.000 3.4222 0.042 0.144 6.876 0.000 3.4611 0.042 0.146 7.018 0.000 3.5000 0.042 0.147 7.158 0.000 3.5389 0.042 0.149 7.295 0.000 3.5778 0.000 0.000 7.430 0.000 Flow Control Exemption 8/13/2024 9:43:53 AM Page 8 Analysis Results POC 1 + Predeveloped x Mitigated Predeveloped Landuse Totals for POC #1 Total Pervious Area:0.52 Total Impervious Area:0.01 Mitigated Landuse Totals for POC #1 Total Pervious Area:0.26 Total Impervious Area:0.27 Flow Frequency Method:Log Pearson Type III 17B Flow Frequency Return Periods for Predeveloped. POC #1 Return Period Flow(cfs) 2 year 0.025667 5 year 0.04024 10 year 0.050388 25 year 0.06356 50 year 0.073545 100 year 0.083632 Flow Frequency Return Periods for Mitigated. POC #1 Return Period Flow(cfs) 2 year 0.014581 5 year 0.024304 10 year 0.032829 25 year 0.046446 50 year 0.058981 100 year 0.073862 Annual Peaks Annual Peaks for Predeveloped and Mitigated. POC #1 Year Predeveloped Mitigated 1949 0.032 0.010 1950 0.033 0.013 1951 0.048 0.040 1952 0.019 0.009 1953 0.014 0.010 1954 0.020 0.012 1955 0.035 0.013 1956 0.028 0.023 1957 0.028 0.012 1958 0.024 0.012 Flow Control Exemption 8/13/2024 9:44:21 AM Page 9 1959 0.019 0.011 1960 0.037 0.036 1961 0.019 0.012 1962 0.015 0.009 1963 0.018 0.012 1964 0.024 0.011 1965 0.019 0.013 1966 0.017 0.011 1967 0.039 0.012 1968 0.022 0.011 1969 0.023 0.010 1970 0.021 0.011 1971 0.022 0.013 1972 0.039 0.028 1973 0.019 0.012 1974 0.022 0.012 1975 0.032 0.012 1976 0.023 0.012 1977 0.007 0.009 1978 0.021 0.012 1979 0.010 0.009 1980 0.050 0.030 1981 0.015 0.011 1982 0.040 0.035 1983 0.026 0.012 1984 0.019 0.010 1985 0.010 0.010 1986 0.043 0.028 1987 0.039 0.034 1988 0.017 0.010 1989 0.011 0.010 1990 0.084 0.040 1991 0.051 0.036 1992 0.023 0.012 1993 0.019 0.010 1994 0.008 0.008 1995 0.025 0.013 1996 0.056 0.039 1997 0.048 0.036 1998 0.018 0.010 1999 0.046 0.028 2000 0.021 0.013 2001 0.006 0.008 2002 0.025 0.030 2003 0.034 0.010 2004 0.046 0.045 2005 0.030 0.013 2006 0.029 0.012 2007 0.065 0.077 2008 0.082 0.049 2009 0.040 0.027 Ranked Annual Peaks Ranked Annual Peaks for Predeveloped and Mitigated. POC #1 Rank Predeveloped Mitigated 1 0.0838 0.0767 2 0.0825 0.0488 3 0.0646 0.0448 Flow Control Exemption 8/13/2024 9:44:21 AM Page 10 4 0.0557 0.0400 5 0.0508 0.0399 6 0.0495 0.0391 7 0.0478 0.0361 8 0.0476 0.0359 9 0.0462 0.0356 10 0.0460 0.0346 11 0.0429 0.0340 12 0.0404 0.0296 13 0.0397 0.0296 14 0.0393 0.0283 15 0.0390 0.0283 16 0.0387 0.0282 17 0.0374 0.0271 18 0.0351 0.0227 19 0.0339 0.0129 20 0.0332 0.0128 21 0.0322 0.0126 22 0.0317 0.0126 23 0.0301 0.0126 24 0.0293 0.0125 25 0.0279 0.0125 26 0.0279 0.0124 27 0.0265 0.0124 28 0.0249 0.0123 29 0.0248 0.0122 30 0.0244 0.0121 31 0.0236 0.0121 32 0.0233 0.0120 33 0.0228 0.0120 34 0.0226 0.0119 35 0.0224 0.0118 36 0.0222 0.0118 37 0.0221 0.0117 38 0.0211 0.0117 39 0.0210 0.0116 40 0.0205 0.0109 41 0.0196 0.0107 42 0.0195 0.0107 43 0.0193 0.0107 44 0.0192 0.0106 45 0.0189 0.0105 46 0.0189 0.0104 47 0.0188 0.0104 48 0.0187 0.0104 49 0.0185 0.0104 50 0.0181 0.0103 51 0.0168 0.0103 52 0.0166 0.0102 53 0.0154 0.0100 54 0.0145 0.0097 55 0.0142 0.0096 56 0.0109 0.0090 57 0.0104 0.0089 58 0.0102 0.0085 59 0.0080 0.0085 60 0.0070 0.0084 61 0.0062 0.0080 Flow Control Exemption 8/13/2024 9:44:21 AM Page 11 Flow Control Exemption 8/13/2024 9:44:21 AM Page 12 Duration Flows The Facility PASSED Flow(cfs)Predev Mit Percentage Pass/Fail 0.0128 9982 4254 42 Pass 0.0134 9030 3258 36 Pass 0.0141 8222 3125 38 Pass 0.0147 7475 2986 39 Pass 0.0153 6782 2883 42 Pass 0.0159 6147 2804 45 Pass 0.0165 5555 2723 49 Pass 0.0171 5078 2637 51 Pass 0.0177 4661 2550 54 Pass 0.0184 4269 2473 57 Pass 0.0190 3925 2415 61 Pass 0.0196 3617 2344 64 Pass 0.0202 3339 2280 68 Pass 0.0208 3089 2209 71 Pass 0.0214 2864 2121 74 Pass 0.0220 2642 2025 76 Pass 0.0226 2436 1929 79 Pass 0.0233 2242 1835 81 Pass 0.0239 2082 1737 83 Pass 0.0245 1915 1659 86 Pass 0.0251 1747 1571 89 Pass 0.0257 1591 1486 93 Pass 0.0263 1474 1407 95 Pass 0.0269 1365 1312 96 Pass 0.0276 1258 1207 95 Pass 0.0282 1148 1115 97 Pass 0.0288 1064 1042 97 Pass 0.0294 988 958 96 Pass 0.0300 931 882 94 Pass 0.0306 869 835 96 Pass 0.0312 812 773 95 Pass 0.0318 764 698 91 Pass 0.0325 717 643 89 Pass 0.0331 664 582 87 Pass 0.0337 622 521 83 Pass 0.0343 587 473 80 Pass 0.0349 549 430 78 Pass 0.0355 501 384 76 Pass 0.0361 471 329 69 Pass 0.0368 432 307 71 Pass 0.0374 389 283 72 Pass 0.0380 352 255 72 Pass 0.0386 323 222 68 Pass 0.0392 286 183 63 Pass 0.0398 255 157 61 Pass 0.0404 218 133 61 Pass 0.0410 191 123 64 Pass 0.0417 164 113 68 Pass 0.0423 145 101 69 Pass 0.0429 130 87 66 Pass 0.0435 114 75 65 Pass 0.0441 106 62 58 Pass 0.0447 95 52 54 Pass Flow Control Exemption 8/13/2024 9:44:21 AM Page 13 0.0453 81 46 56 Pass 0.0459 71 44 61 Pass 0.0466 60 41 68 Pass 0.0472 54 36 66 Pass 0.0478 48 31 64 Pass 0.0484 43 23 53 Pass 0.0490 42 14 33 Pass 0.0496 40 8 20 Pass 0.0502 39 7 17 Pass 0.0509 36 7 19 Pass 0.0515 36 6 16 Pass 0.0521 35 6 17 Pass 0.0527 34 6 17 Pass 0.0533 32 6 18 Pass 0.0539 28 6 21 Pass 0.0545 27 6 22 Pass 0.0551 22 6 27 Pass 0.0558 18 6 33 Pass 0.0564 15 6 40 Pass 0.0570 15 5 33 Pass 0.0576 13 5 38 Pass 0.0582 11 5 45 Pass 0.0588 10 5 50 Pass 0.0594 9 5 55 Pass 0.0601 7 5 71 Pass 0.0607 6 5 83 Pass 0.0613 5 4 80 Pass 0.0619 5 4 80 Pass 0.0625 5 4 80 Pass 0.0631 5 4 80 Pass 0.0637 5 3 60 Pass 0.0643 5 3 60 Pass 0.0650 4 3 75 Pass 0.0656 3 3 100 Pass 0.0662 3 3 100 Pass 0.0668 3 3 100 Pass 0.0674 3 3 100 Pass 0.0680 3 3 100 Pass 0.0686 3 3 100 Pass 0.0693 3 3 100 Pass 0.0699 3 3 100 Pass 0.0705 3 3 100 Pass 0.0711 3 3 100 Pass 0.0717 3 3 100 Pass 0.0723 3 3 100 Pass 0.0729 3 2 66 Pass 0.0735 3 1 33 Pass Flow Control Exemption 8/13/2024 9:44:21 AM Page 14 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. Flow Control Exemption 8/13/2024 9:44:21 AM Page 15 LID Report Flow Control Exemption 8/13/2024 9:44:41 AM Page 16 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. Flow Control Exemption 8/13/2024 9:44:41 AM Page 17 Appendix Predeveloped Schematic Flow Control Exemption 8/13/2024 9:44:42 AM Page 18 Mitigated Schematic Flow Control Exemption 8/13/2024 9:44:43 AM Page 19 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 Flow Control Exemption.wdm MESSU 25 PreFlow Control Exemption.MES 27 PreFlow Control Exemption.L61 28 PreFlow Control Exemption.L62 30 POCFlow Control Exemption1.dat END FILES OPN SEQUENCE INGRP INDELT 00:15 PERLND 12 IMPLND 2 COPY 501 DISPLY 1 END INGRP END OPN SEQUENCE DISPLY DISPLY-INFO1 # - #<----------Title----------->***TRAN PIVL DIG1 FIL1 PYR DIG2 FIL2 YRND 1 Basin 1 MAX 1 2 30 9 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 *** 12 C, Forest, Steep 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 *** 12 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 ********* 12 0 0 4 0 0 0 0 0 0 0 0 0 1 9 END PRINT-INFO Flow Control Exemption 8/13/2024 9:44:43 AM Page 20 PWAT-PARM1 <PLS > PWATER variable monthly parameter value flags *** # - # CSNO RTOP UZFG VCS VUZ VNN VIFW VIRC VLE INFC HWT *** 12 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 12 0 4.5 0.08 400 0.15 0.5 0.996 END PWAT-PARM2 PWAT-PARM3 <PLS > PWATER input info: Part 3 *** # - # ***PETMAX PETMIN INFEXP INFILD DEEPFR BASETP AGWETP 12 0 0 2 2 0 0 0 END PWAT-PARM3 PWAT-PARM4 <PLS > PWATER input info: Part 4 *** # - # CEPSC UZSN NSUR INTFW IRC LZETP *** 12 0.2 0.3 0.35 6 0.3 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 12 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 *** 2 ROADS/MOD 1 1 1 27 0 END GEN-INFO *** Section IWATER*** ACTIVITY <PLS > ************* Active Sections ***************************** # - # ATMP SNOW IWAT SLD IWG IQAL *** 2 0 0 1 0 0 0 END ACTIVITY PRINT-INFO <ILS > ******** Print-flags ******** PIVL PYR # - # ATMP SNOW IWAT SLD IWG IQAL ********* 2 0 0 4 0 0 4 1 9 END PRINT-INFO IWAT-PARM1 <PLS > IWATER variable monthly parameter value flags *** # - # CSNO RTOP VRS VNN RTLI *** 2 0 0 0 0 0 END IWAT-PARM1 IWAT-PARM2 <PLS > IWATER input info: Part 2 *** # - # *** LSUR SLSUR NSUR RETSC 2 400 0.05 0.1 0.08 END IWAT-PARM2 IWAT-PARM3 <PLS > IWATER input info: Part 3 *** # - # ***PETMAX PETMIN 2 0 0 Flow Control Exemption 8/13/2024 9:44:43 AM Page 21 END IWAT-PARM3 IWAT-STATE1 <PLS > *** Initial conditions at start of simulation # - # *** RETS SURS 2 0 0 END IWAT-STATE1 END IMPLND SCHEMATIC <-Source-> <--Area--> <-Target-> MBLK *** <Name> # <-factor-> <Name> # Tbl# *** Basin 1*** PERLND 12 0.52 COPY 501 12 PERLND 12 0.52 COPY 501 13 IMPLND 2 0.01 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 *** # - # 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 Flow Control Exemption 8/13/2024 9:44:43 AM Page 22 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 MASS-LINK 15 IMPLND IWATER SURO 0.083333 COPY INPUT MEAN END MASS-LINK 15 END MASS-LINK END RUN Flow Control Exemption 8/13/2024 9:44:43 AM Page 23 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 Flow Control Exemption.wdm MESSU 25 MitFlow Control Exemption.MES 27 MitFlow Control Exemption.L61 28 MitFlow Control Exemption.L62 30 POCFlow Control Exemption1.dat END FILES OPN SEQUENCE INGRP INDELT 00:15 PERLND 16 IMPLND 2 IMPLND 4 RCHRES 1 COPY 1 COPY 501 DISPLY 1 END INGRP END OPN SEQUENCE DISPLY DISPLY-INFO1 # - #<----------Title----------->***TRAN PIVL DIG1 FIL1 PYR DIG2 FIL2 YRND 1 Vault 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 *** 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 Flow Control Exemption 8/13/2024 9:44:43 AM Page 24 # - # ATMP SNOW PWAT SED PST PWG PQAL MSTL PEST NITR PHOS TRAC ********* 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 *** 2 ROADS/MOD 1 1 1 27 0 4 ROOF TOPS/FLAT 1 1 1 27 0 END GEN-INFO *** Section IWATER*** ACTIVITY <PLS > ************* Active Sections ***************************** # - # ATMP SNOW IWAT SLD IWG IQAL *** 2 0 0 1 0 0 0 4 0 0 1 0 0 0 END ACTIVITY PRINT-INFO <ILS > ******** Print-flags ******** PIVL PYR # - # ATMP SNOW IWAT SLD IWG IQAL ********* 2 0 0 4 0 0 4 1 9 4 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 *** 2 0 0 0 0 0 4 0 0 0 0 0 END IWAT-PARM1 IWAT-PARM2 <PLS > IWATER input info: Part 2 *** # - # *** LSUR SLSUR NSUR RETSC Flow Control Exemption 8/13/2024 9:44:43 AM Page 25 2 400 0.05 0.1 0.08 4 400 0.01 0.1 0.1 END IWAT-PARM2 IWAT-PARM3 <PLS > IWATER input info: Part 3 *** # - # ***PETMAX PETMIN 2 0 0 4 0 0 END IWAT-PARM3 IWAT-STATE1 <PLS > *** Initial conditions at start of simulation # - # *** RETS SURS 2 0 0 4 0 0 END IWAT-STATE1 END IMPLND SCHEMATIC <-Source-> <--Area--> <-Target-> MBLK *** <Name> # <-factor-> <Name> # Tbl# *** Basin 1*** PERLND 16 0.26 RCHRES 1 2 PERLND 16 0.26 RCHRES 1 3 IMPLND 2 0.09 RCHRES 1 5 IMPLND 4 0.18 RCHRES 1 5 ******Routing****** PERLND 16 0.26 COPY 1 12 IMPLND 2 0.09 COPY 1 15 IMPLND 4 0.18 COPY 1 15 PERLND 16 0.26 COPY 1 13 RCHRES 1 1 COPY 501 16 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 Vault 1 1 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 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 END PRINT-INFO HYDR-PARM1 Flow Control Exemption 8/13/2024 9:44:43 AM Page 26 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 0 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 0.02 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 0.0 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 1 92 4 Depth Area Volume Outflow1 Velocity Travel Time*** (ft) (acres) (acre-ft) (cfs) (ft/sec) (Minutes)*** 0.000000 0.042241 0.000000 0.000000 0.038889 0.042241 0.001643 0.002090 0.077778 0.042241 0.003285 0.002956 0.116667 0.042241 0.004928 0.003621 0.155556 0.042241 0.006571 0.004181 0.194444 0.042241 0.008213 0.004674 0.233333 0.042241 0.009856 0.005120 0.272222 0.042241 0.011499 0.005531 0.311111 0.042241 0.013142 0.005913 0.350000 0.042241 0.014784 0.006271 0.388889 0.042241 0.016427 0.006610 0.427778 0.042241 0.018070 0.006933 0.466667 0.042241 0.019712 0.007241 0.505556 0.042241 0.021355 0.007537 0.544444 0.042241 0.022998 0.007822 0.583333 0.042241 0.024640 0.008096 0.622222 0.042241 0.026283 0.008362 0.661111 0.042241 0.027926 0.008619 0.700000 0.042241 0.029568 0.008869 0.738889 0.042241 0.031211 0.009112 0.777778 0.042241 0.032854 0.009349 0.816667 0.042241 0.034496 0.009579 0.855556 0.042241 0.036139 0.009805 0.894444 0.042241 0.037782 0.010025 0.933333 0.042241 0.039425 0.010241 0.972222 0.042241 0.041067 0.010452 1.011111 0.042241 0.042710 0.010659 1.050000 0.042241 0.044353 0.010862 1.088889 0.042241 0.045995 0.011061 1.127778 0.042241 0.047638 0.011257 1.166667 0.042241 0.049281 0.011450 1.205556 0.042241 0.050923 0.011639 1.244444 0.042241 0.052566 0.011825 1.283333 0.042241 0.054209 0.012008 1.322222 0.042241 0.055851 0.012189 1.361111 0.042241 0.057494 0.012367 1.400000 0.042241 0.059137 0.012542 1.438889 0.042241 0.060780 0.012715 1.477778 0.042241 0.062422 0.012886 1.516667 0.042241 0.064065 0.013055 1.555556 0.042241 0.065708 0.017042 1.594444 0.042241 0.067350 0.020533 Flow Control Exemption 8/13/2024 9:44:43 AM Page 27 1.633333 0.042241 0.068993 0.022907 1.672222 0.042241 0.070636 0.024847 1.711111 0.042241 0.072278 0.026539 1.750000 0.042241 0.073921 0.028062 1.788889 0.042241 0.075564 0.029461 1.827778 0.042241 0.077206 0.030765 1.866667 0.042241 0.078849 0.031992 1.905556 0.042241 0.080492 0.033155 1.944444 0.042241 0.082134 0.034264 1.983333 0.042241 0.083777 0.035326 2.022222 0.042241 0.085420 0.036348 2.061111 0.042241 0.087063 0.037333 2.100000 0.042241 0.088705 0.038286 2.138889 0.042241 0.090348 0.039211 2.177778 0.042241 0.091991 0.040109 2.216667 0.042241 0.093633 0.040982 2.255556 0.042241 0.095276 0.041834 2.294444 0.042241 0.096919 0.042666 2.333333 0.042241 0.098561 0.043479 2.372222 0.042241 0.100204 0.045815 2.411111 0.042241 0.101847 0.047342 2.450000 0.042241 0.103489 0.048664 2.488889 0.042241 0.105132 0.049878 2.527778 0.042241 0.106775 0.124711 2.566667 0.042241 0.108418 0.325807 2.605556 0.042241 0.110060 0.597605 2.644444 0.042241 0.111703 0.923161 2.683333 0.042241 0.113346 1.291460 2.722222 0.042241 0.114988 1.693052 2.761111 0.042241 0.116631 2.118753 2.800000 0.042241 0.118274 2.559210 2.838889 0.042241 0.119916 3.004845 2.877778 0.042241 0.121559 3.445995 2.916667 0.042241 0.123202 3.873188 2.955556 0.042241 0.124844 4.277500 2.994444 0.042241 0.126487 4.651001 3.033333 0.042241 0.128130 4.987245 3.072222 0.042241 0.129772 5.281827 3.111111 0.042241 0.131415 5.532978 3.150000 0.042241 0.133058 5.742205 3.188889 0.042241 0.134701 5.914973 3.227778 0.042241 0.136343 6.061423 3.266667 0.042241 0.137986 6.272730 3.305556 0.042241 0.139629 6.428894 3.344444 0.042241 0.141271 6.581341 3.383333 0.042241 0.142914 6.730323 3.422222 0.042241 0.144557 6.876068 3.461111 0.042241 0.146199 7.018778 3.500000 0.042241 0.147842 7.158636 3.538889 0.042241 0.149485 7.295805 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 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 1 HYDR RO 1 1 1 WDM 1000 FLOW ENGL REPL RCHRES 1 HYDR STAGE 1 1 1 WDM 1001 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 Flow Control Exemption 8/13/2024 9:44:43 AM Page 28 END EXT TARGETS MASS-LINK <Volume> <-Grp> <-Member-><--Mult--> <Target> <-Grp> <-Member->*** <Name> <Name> # #<-factor-> <Name> <Name> # #*** MASS-LINK 2 PERLND PWATER SURO 0.083333 RCHRES INFLOW IVOL END MASS-LINK 2 MASS-LINK 3 PERLND PWATER IFWO 0.083333 RCHRES INFLOW IVOL END MASS-LINK 3 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 16 RCHRES ROFLOW COPY INPUT MEAN END MASS-LINK 16 END MASS-LINK END RUN Flow Control Exemption 8/13/2024 9:44:43 AM Page 29 Predeveloped HSPF Message File Flow Control Exemption 8/13/2024 9:44:43 AM Page 30 Mitigated HSPF Message File Flow Control Exemption 8/13/2024 9:44:43 AM Page 31 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. 2005-2024; 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