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APPROVED STM RESUB3 Storm_Drainage_Report+6.24.2022_1.57.18_PM+2953501RES U B BLD2021-0356 Jun 24 2022 CITY OF EDMONDS DEVELOPMENT SERVICES DEPARTMENT Storm Drainage Report 8029 — 238th Street SW Edmonds, WA 98020 Parcel # 00451900102000 Application # BLD2021-0356 Prepared for: Ruoyun Zhen 1371 - 247th Place SE Sammamish, WA 98075 (425) 533-1121 Prepared by: COMPLIES WITH APPLICABLE CITY STORMWATER CODE 07/08/2022 „may 8627 NE 180th Street ae Bothell, Washington 98011 A N s T E Y Phone: (206) 303-7639 Fax: (425) 658-0923 E N G I N E E R I N G E-mail: BenAnstey@AnsteyEngineering.com May 2022 Table of Contents Page 1. Site Analysis...............................................................................................................1 1.1 Project Overview...............................................................................................1 1.2 Site Analysis......................................................................................................1 2. Conditions and Requirements Summary....................................................................2 2.1 Minimum Requirement #1: Preparation of Stormwater Site Plans ...................2 2.2 Minimum Requirement #2: Construction Stormwater Pollution Prevention (SWPP)..............................................................................................................2 2.3 Minimum Requirement #3: Source Control of Pollution..................................3 2.4 Minimum Requirement #4: Preservation of Natural Drainage Systems and Outfalls..............................................................................................................3 2.5 Minimum Requirement #5: On -site Stormwater Management .........................3 2.6 Minimum Requirement #6: Runoff Treatment..................................................3 2.7 Minimum Requirement #7: Flow Control.........................................................3 2.8 Minimum Requirement #8: Wetlands Protection..............................................3 2.9 Minimum Requirement #9: Operation and Maintenance..................................3 3. Offsite Analysis..........................................................................................................4 3.1 Upstream Analysis.............................................................................................4 3.2 Downstream Analysis........................................................................................4 4. Permanent Stormwater Control Plan..........................................................................4 5. Construction Stormwater Pollution Prevention Plan..................................................8 6. Conveyance System Analysis and Design................................................................14 7. Special Reports and Studies......................................................................................15 8. Other Permits............................................................................................................15 References..........................................................................................................................17 Appendix A Referenced Materials................................................................................19 Figure I-2.4.1 Flow Chart for Determining Requirements for New Development Figure 1-2.4.2 Flow Chart for Determining Requirements for Redevelopment Figure 1-2.5.1 Flow Chart for Determining LID MR #5 Requirements Soils map 1. SITE ANALYSIS 1.1 Project Overview 8029 — 238th Street SW is located within the limits of the City of Edmonds. The site is bounded by 238th Street SW on the south, a convenience store on the west, a restaurant on the north and detached condominia on the east. The 7,956 W (0.18 acre) property currently has one single-family residence toward the front of the property. The residence is currently un-occupied. The site drains to the south as sheet flow on compacted surfaces and infiltrates elsewhere. This project will raze the existing building and construct a single structure containing four townhouses. The general area is shown in Figure 1. Figure 1. Vicinity map. The project site includes only the subject property. 1.2 Site Analysis A survey was performed over the site by Geodetic Surveying Services in October 2019. Infiltration tests were performed by JJA in October 2018. While the soils are feasible for infiltration, the proximity and elevation of the property to the east preclude infiltration as water infiltrated on the subject property might spring on the neighbouring property. 2. CONDITIONS AND REQUIREMENTS SUMMARY Applicable Site Conditions A Critical Areas Checklist was prepared for the site. The City's determination is of an Erosion Hazard Area. Native Soil and Vegetation Protection Areas No native soil or vegetation protection areas exist on the site and none are proposed. Applicable Site Requirements The City of Edmonds has adopted the 2012 Stormwater Management Manual for Western Washington (SWMMWW) by Washington Department of Ecology as the basis of their storm drainage review. The SWMMWW is supplemented by Stormwater Code Supplement (Supplement) dated 20 April 2010. As part of that review, Figure I-2.4.1, Flow Chart for Determining Requirements for New Development, was applied. Existing impervious coverage exceeds 35 per cent, so Figure I-2.4.2, Flow Chart for Determining Requirements for Redevelopment, was applied. The result is that all Minimum Requirements need to be addressed. Table 1 gives the distribution of hard surfaces for determining the applicable minimum requirements. Surface type Area (ft) PGHS Replaced Total Parking Basin 1 Townhouse Basin 2 Street Basin 3 922 248 185 488 New 2,322 2,322 Total 3,244 248 2,508 488 Non-PGHS Replaced 0 New 4,471 4,471 Total 4,471 4,471 Total Hard Surface 6,793 Table 1. Hard surface distribution. 2.1 Minimum Requirement #1: Preparation of Stormwater Site Plans All projects meeting the thresholds in I-2.4 Applicability of the Minimum Requirements shall prepare a Stormwater Site Plan for local government review. This requirement will be satisfied by the acceptance of this report by the City of Edmonds. 2.2 Minimum Requirement #2: Construction Stormwater Pollution Prevention (SWPP) Objective: to control erosion and prevent sediment and other pollutants from leaving the site during the construction phase of a project. To have fully functional stormwater facilities and BMP's for the developed site upon completion of construction. This requirement is addressed in Section 5, below. Pa 2.3 Minimum Requirement #3: Source Control of Pollution Objective: the intent of source control BMPs is to prevent stormwater from coming in contact with pollutants. They are a cost-effective means of reducing pollutants in stormwater and, therefore, should be a first consideration in all projects. This requirement is addressed in Section 4.4, below. 2.4 Minimum Requirement #4: Preservation of Natural Drainage Systems and Outfalls Objective: to preserve and utilize natural drainage systems to the fullest extent because of the multiple stormwater benefits these systems provide; and to prevent erosion at and downstream of the discharge location. The area of this project has been heavily disturbed by suburban development. From modern contours, it appears the area was dominated by sheet flow of excess precipitation. Concentrated flow appears to have begun southeast of the site and continued to Lake Ballinger. Given the results of the on -site infiltration test, it is assumed that the majority of precipitation infiltrated with some taken up by plants. The current outfall is 238th Street SW and then in to the City storm drain about 90 feet to the east. 2.5 Minimum Requirement #5: On -site Stormwater Management Objective: to use practices distributed across a development that reduce the amount of disruption of the natural hydrologic characteristics of the site. This is addressed in Section 4.4 below. 2.6 Minimum Requirement #6: Runoff Treatment Objective: to reduce pollutant loads and concentrations in stormwater runoff using physical, biological and chemical removal mechanisms so that beneficial uses of receiving waters are maintained and, where applicable, restored. When site conditions are appropriate, infiltration can potentially be the most effective BMP for runoff treatment. 2.7 Minimum Requirement #7: Flow Control Objective: to prevent increases in the stream channel erosion rates that are characteristic of natural conditions (i.e., prior to disturbance by European settlement). This is addressed in Section 4.6 below. 2.8 Minimum Requirement #8: Wetlands Protection Objective: to ensure that wetlands receive the same level of protection as any other waters of the state. 2.9 Minimum Requirement #9: Operation and Maintenance Objective: to ensure that stormwater control facilities are adequately maintained and operated properly. Other Requirements No other special requirements, such as re -zones, variances, adjustments or SEPA mitigations are required for this site. 3. OFFSITE ANALYSIS 3.1 Upstream Analysis All upslope lands are paved. Boundary curbs and drain inlets prevent flow from entering the site. It is assumed there is no runon from the property. 3.2 Downstream Analysis A downstream analysis was performed per I-2.6.2 Optional Guidance #2: Off Site Analysis and Mitigation of the manual. A site visit on 3 October 2020 included observations upstream and downstream of the project site. Following are the results. There is flow on to the property from the convenience store to the west and a planter to the north, that is a part of the restaurant. Flow from the convenience store was included in the calculations for their detention tank and is accounted for in Section 4.5. Any surface runoff from the site enters 238th Street SW. About 90 feet to the east is a catch basin on the City's storm drain system. The storm drains alternates between closed flow and roadside ditches as it drains east to 78th Avenue W and then south, primarily along the east side of 78th Avenue W. The analysis ended at 238 Place SW. No obvious failures were seen, though the open ditches could use some attention. Resource Review A request was made to the City for drainage complaints downstream of the project to the City limits, about one -quarter mile. There are no active complaints. 4. PERMANENT STORMWATER CONTROL PLAN Introduction The Western Washington Hydrology Model (WHMM) was used for hydrology and to test storm facilities. The site has been divided in to three basins: one for the parking area, one for the townhouse area and the third for the right-of-way. 4.1 Existing Site Hydrology Land contributing to drainage from the site is limited to the property itself and a portion of the convenience store parking lot that is directed to the site by landscape curbing. The distribution of land within the project site is given in Table 2. The existing site conditions are shown in Figure 2. Construction of the convenience store included installation of the existing detention tank. Running roughly parallel to the street, it is 36 inches in diameter and 79 feet long. A small amount of additional storage is available in the two pipes connecting catch basins to the tank. Table 2 is an accounting of all lands back of the curb. Limits to the east and west were set to match the developed condition for easier comparison. An objective of design is to not increase the amount of impervious surface draining to this tank so as not to alter its function. 4 O DESCRIPTION 1 ROOF AREA & GUTTERS 2 WALKS & STEPS 3 DRIVEWAY 4 PARKING LOT CAPTURED 5 1 LANDSCAPING 8627 NE 180th St. ae BOTHELL, WA 98011 PHONE: (206) 303-7639 A Ill S T E= Y FAX: (425) 658-9203 E N G I N E E R I N G EMAIL: BenAnstey52@yahoo.com STUDY AREA IMPERVIOUS BOUNDARY DRAINS TO EX OFF —SITE DETENTION DRAINS TO STREET ON —SITE FLOW GRAPHIC SCALE 1 "= 20' 0 10 20 40 Drawing Title: Figure 2 PRE —DEVELOPED HYDROLOGY MAP Work Order 20012AE Date: MAY 2022 Scale: 1 "= 20' Sheet 1 of 1 Sheets 3 w Q N O O N N O W L �1 01 a) a> E O E a z a, .3 6 n Cover e Area Description Parking Ex House Street Subject property 12,000 sf Basin 1 Basin 2 Basin 3 Sum of basins for modelling 14,403 sf 4,408 7,141 2,853 1 Impervious Roof area and gutters 1,025 sf 1,025 2 Walks & steps 539 sf 146 393 3 Driveway PGHS 1,049 sf 324 726 4 Parking lot captured PGHS 3,908 sf 3,908 Parking lot bypassed (PGHS) -565 sf -565 Total impervious area Total % impervious 5,956 sf 3,343 1,495 1,118 41.4 5 Pervious Landscaping 8,317 sf 1,065 5,517 1,735 Pervious bypassed 130 sf 130 Total pervious area 8,447 sf 1,065 5,646 Total % pervious 58.6 ]�!] Table 2. Pre -developed land distribution of the subject property. 4.2 Developed Site Hydrology The proposed site development is shown in Figure 3. It consists of the following major elements: • One 3-story townhouse building with four residences, • paved driveway, • parking lot with sidewalk and • landscaping. Roof and surface runoff will be collected and routed to the detention tank in pipes of 4- to 6-inch diameter. Sising of pipes is given in Section 6. The distribution of land within the project site is given in Table 3. The shaded area is to determine if water quality treatment is required; see Section 4.5. The mapped hydrology is given in Figure 3. The soils map for the site is given in Appendix A. Co-ordination between existing and developed conditions was interesting. Flow to the existing convenience store detention tank could not increase and bypass flows from frontage improvements needed to be balanced by capturing street flow. The existing catch basin in the parking area was moved upslope, allowing some extra parking lot to bypass it and compensating for the bypassed area with the proposed sidewalk along the west side of the new townhouses. As a result, the impervious area delivered to the tank was un-changed. This was modelled as Basin 1 (POC 1) in WWHM. The results for this and the other areas are given in Table 4. The area previously captured by this catch basin is now collected to the on -site detention. Cover type Lot area 12,000 sf Parking Basin 1 Townhouse Basin 2 Street Basin 3 Sum of basins for modelling 15,689 sf 4,463 8,216 3,011 Impervious 1 Roof area and gutters 4,253 sf 4,253 2 Walks & steps 1,000 sf 384 113 503 3 Driveway (PGHS) 2,420 sf 2,UU1 419 4 Parking lot captured (PGHS) 4,431 sf 3,523 908 1,372 5 Street paving (PGHS) 1,372 sf 6 Activity zone pervious pavers (50%) 105 sf 0 105 Sidewalk bypassed -326 sf -326 Driveway bypassed (PGHS) -201 sf -201 Parking lot bypassed (PGHS) 0 sf 0 0 0 Total impervious area 13,055 sf 3,907 7,380 1,768 Total % impervious 83.21 % Pervious 2,529 sf 556 731 1,243 7 Landscaping 4 Activity zone pervious pavers (50%) 105 sf 0 105 0 Total pervious area 2,634 sf 16.79 % 556 836 1,243 Total % pervious Shaded values are for water quality treatment determination. Table 3. Post -developed land distribution of the subject property. POC 2 models the area contributing to flow control for on -site areas and the street. This consists of Basins 2 and 3.. On -site flow (Basin 2) is collected by an assortment of pipes and routed to detention. The street area (Basin 3) was configured to capture flow from an area equivalent to the site frontage area. A new catch basin will be installed at the easterly driveway and another far enough to the west to capture an area equal to that of the project frontage. Flow from the street drains directly to the flow control structure. Table 4 presents a summary of the pre -developed (un-mitigated) flow and post -developed (mitigated) flows for off -site and on -site detention. Pre -developed Un-mitigated Mitigated Area Area description Q100 (ft3/s) Qioo (ft3/s) Q100 (ft3/s) POC 1 Basin 1 Parking lot 0.074 0.073 POC 2 Basin 2 Building & drivewa 0.094 0.044 Basin 3 Street & sidewalk Table 4. Post -developed land distribution of the subject property. M 4.3 Low Impact Development Performance Standards In accordance with SWMMWW Table I-3.1 "Minimum Requirement #5 Compliance Options for Projects Triggering Minimum Requirements #1 - #9", Minimum Requirement 5 is satisfied as Minimum Requirement 7 is required on this project and the storage for the detention satisfies the requirements for Minimum Requirement 5. This also satisfies Section 5.5 of the Addendum. A review of On -Site Stormwater Management BMPs is included below as the addition of any one of them is an improvement on the goal of Minimum Requirement 5. (Applicability of any of the BMPs below does not serve as a mandate for its eventual inclusion in the project.) 4.4 On -site Stormwater Management BMPs The parking area to the west was re -configured as described in Section 4.2. As a result, there is no increase to the City's MS4 that is not routed through stormwater management, in this case detention. The following are evaluated for application of BMPs in addition to the on -site detention, determined in Section 4.6. Lawn and landscaped areas Post -Construction Soil Quality and Depth This will be applied to all planters within the project and the right-of-way in accordance with BMP T5.13 Roofs Downspout Full Infiltration The reason infiltration facilities were not recommended for this site is the possibility of springing on the property to the east. The area in front of the proposed townhouses is forward of the adjacent retaining wall. The downslope lands are consistent in slope. As a result, Downspout Full Infiltration will be used in this area. Full Dispersion Due to a lack of area for dispersion, Full Dispersion is not viable for this project. Bioretention Due to a lack of area for placement, Bioretention is not viable for this project. Downspout Dispersion Systems Due to a lack of area for dispersion, Downspout Dispersion is not viable for this project. Perforated Stub -out Connection As there is no place on the site downhill from the building that accommodates the required setbacks, Perforated Stub -out Connection is not viable for this project. Other Hard Surfaces Full Dispersion Due to a lack of area for dispersion, Full Dispersion is not viable for this project. 7 Permeable Pavement The reason infiltration facilities were not recommended for this site is the possibility of springing on the property to the east. The area in front of the proposed townhouses is forward of the adjacent retaining wall. The downslope lands are consistent in slope. As a result, Permeable Pavement will be used in this area. Bioretention BMP's There is in -sufficient room between the curb and sidewalk, nor an effective length for a bioretention swale or planter. On -site a lack of area for bioretention. Site coverage does not allow for planter boxes. Therefore, Bioretention BMP's are not viable for this project. Sheet Flow Dispersion Due to a lack of area for dispersion, Sheet Flow Dispersion is not viable for this project. Alternative Solution As the new and compensatory impervious surfaces receive no other treatment, detention will be applied. In this section, the volume required will be determined from Section 6.3 of the Supplement. As the project has a contributing areas greater than 1,000 ft2, the sising equation for a 36-inch pipe will be used as a benchmark to be applied to the design tank that will be of 72-inch pipe. Design of the detention tank will be taken up in the Section 4.6. 4.5 Runoff Treatment The architect was consulted on the inclusion of the roof as a Pollution Generating Impervious Surfaces (PGIS). The building will have an asphalt shingle roof and no equipment on the roof. As a result, the roof is not a PGIS. The areas of Table 2, in grey, are the PGIS. The sum area is 4,604 ft2. Per Section I-2.5.6 "Minimum Requirement #6: Runoff Treatment" of the SWMMWW, projects with less than 5,000 ft2 or more than 3/4-acre are not required to provide runoff treatment. 4.6 Flow Control In accordance with the SWMMWW, stormwater discharges shall match developed discharge durations to predeveloped durations for the range of pre -developed discharge rates from 50% of the 2-year peak flow up to the full 50-year peak flow. The Western Washington Hydrology Model (WWHM) was used to size a detention tank to satisfy this. The WWHM results are given at the end of this report. While not a part of this project, the control structure for the convenience store detention tank is very close to the location of the proposed building. To relieve this condition, an elbow will be placed at the end of the 36-inch pipe and the control structure moved to the south. A detail had been prepared in the plans. This change will result in about fifty-six cubic feet of additional storage. 5. CONSTRUCTION STORMWATER POLLUTION PREVENTION PLAN Per Minimum Requirement #2, all new development and redevelopment projects are responsible for preventing erosion and discharge of sediment and other pollutants into receiving waters. This is achieved through: Project Requirements - Construction SWPPP Elements Element 1: Preserve Vegetation/Mark Clearing Limits 111 • Before beginning land disturbing activities, including clearing and grading, clearly mark all clearing limits, sensitive areas and their buffers, and trees that are to be preserved within the construction area. • Retain the duff layer, native top soil, and natural vegetation in an undisturbed state to the maximum degree practicable. Element 2: Establish Construction Access • Limit construction vehicle access and exit to one route, if possible. • Stabilize access points with a pad of quarry spalls, crushed rock or other equivalent BMPs, to minimize tracking of sediment onto public roads. • Locate wheel wash or tire baths on site, if the stabilized construction entrance is not effective in preventing tracking sediment onto roads. • If sediment is tracked off site, clean the affected roadway thoroughly at the end of each day, or more frequently as necessary (for example, during wet weather). Remove sediment from roads by shoveling, sweeping, or pick up and transport the sediment to a controlled sediment disposal area. • Conduct street washing only after sediment is removed in accordance with the above bullet. • Control street wash wastewater by pumping back on -site, or otherwise prevent it from discharging into systems tributary to waters of the State. Element 3: Control Flow Rates • Protect properties and waterways downstream of development sites from erosion and the associated discharge of turbid waters due to increases in the velocity and peak volumetric flow rate of stormwater runoff from the project site. • Where necessary to comply with the bullet above, construct stormwater retention or detention facilities as one of the first steps in grading. Assure that detention facilities function properly before constructing site improvements (e.g., impervious surfaces). • If permanent infiltration ponds are used for flow control during construction, protect these facilities from siltation during the construction phase. Element 4: Install Sediment Controls • Design, install, and maintain effective erosion controls and sediment controls to minimize the discharge of pollutants. • Construct sediment control BMPs (sediment ponds, traps, filters, etc.) as one of the first steps in grading. These BMPs shall be functional before other land disturbing activities take place. • Minimize sediment discharges from the site. The design, installation and maintenance of erosion and sediment controls must address factors such as the amount, frequency, intensity and duration of precipitation, the nature of resulting stormwater runoff and soil characteristics, including the range of soil particle sizes expected to be present on the site. • Direct stormwater runoff from disturbed areas through a sediment pond or other appropriate sediment removal BMP, before the runoff leaves a construction site or before discharge to an infiltration facility. Runoff from fully stabilized areas may be discharged without a sediment removal BMP, but must meet the flow control performance standard in Element #3, bullet # 1. 9 • Locate BMPs intended to trap sediment on -site in a manner to avoid interference with the movement of juvenile salmonids attempting to enter off -channel areas or drainages. • Where feasible, design outlet structures that withdraw impounded stormwater from the surface to avoid discharging sediment that is still suspended lower in the water column. Element 5: Stabilize Soils • Stabilize exposed and unworked soils by application of effective BMPs that prevent erosion. Applicable BMPs include, but are not limited to: temporary and permanent seeding, sodding, mulching, plastic covering, erosion control fabrics and matting, soil application of polyacrylamide (PAM), the early application of gravel base early on areas to be paved, and dust control. • Control stormwater volume and velocity within the site to minimize soil erosion. • Control stormwater discharges, including both peak flow rates and total stormwater volume, to minimize erosion at outlets and to minimize downstream channel and stream bank erosion. • Soils must not remain exposed and unworked for more than the time periods set forth below to prevent erosion: o During the dry season (May 1 - Sept. 30): 7 days o During the wet season (October 1 - April 30): 2 days • Stabilize soils at the end of the shift before a holiday or weekend if needed based on the weather forecast. • Stabilize soil stockpiles from erosion, protected with sediment trapping measures and, where possible, be located away from storm drain inlets, waterways and drainage channels. • Minimize the amount of soil exposed during construction activity. • Minimize the disturbance of steep slopes. • Minimize soil compaction and, unless infeasible, preserve topsoil. Element 6: Protect Slopes • Design and construct cut -and -fill slopes in a manner to minimize erosion. Applicable practices include, but are not limited to, reducing continuous length of slope with terracing and diversions, reducing slope steepness and roughening slope surfaces (for example, track walking). • Divert off -site stormwater (run-on) or ground water away from slopes and disturbed areas with interceptor dikes, pipes and/or swales. Off -site stormwater should be managed separately from stormwater generated on the site. • At the top of slopes, collect drainage in pipe slope drains or protected channels to prevent erosion. o Temporary pipe slope drains must handle the peak volumetric now rate calculated using a 10-minute time step from a Type IA, 10-year, 24-hour frequency storm for the developed condition. Alternatively, the 10-year and 1-hour now rate predicted by an approved continuous runoff model, increased by a factor of 1.6, may be used. The hydrologic analysis must use the existing land cover condition for predicting flow rates from tributary areas outside the project limits. For tributary areas on the project site, the analysis must use the temporary or 101 permanent project land cover condition, whichever will produce the highest flow rates. If using the Western Washington Hydrology Model (WWHM) to predict flows, bare soil areas should be modeled as "landscaped" area. • Place excavated material on the uphill side of trenches, consistent with safety and space considerations. Place check dams at regular intervals within constructed channels that are cut down a slope. Element 7: Protect Drain Inlets Protect all storm drain inlets made operable during construction so that stormwater runoff shall not enter the conveyance system without first being filtered or treated to remove sediment. Clean or remove and replace inlet protection devices when sediment has filled one-third of the available storage (unless a different standard is specified by the product manufacturer). Element 8: Stabilize Channels and Outlets • Design, construct, and stabilize all on -site conveyance channels to prevent erosion from the following expected peak flows: o Channels must handle the peak volumetric flow rate calculated using a 10-minute time step from a Type IA, 10- year, 24-hour frequency storm for the developed condition. Alternatively, the 10-year, 1-hour flow rate indicated by an approved continuous runoff model, increased by a factor of 1.6, may be used. The hydrologic analysis must use the existing land cover condition for predicting flow rates from tributary areas outside the project limits. For tributary areas on the project site, the analysis must use the temporary or permanent project land cover condition, whichever will produce the highest flow rates. If using the Western Washington Hydrology Model (WWHM) to predict flows, bare soil areas should be modeled as "landscaped area. • Provide stabilization, including armoring material, adequate to prevent erosion of outlets, adjacent stream banks, slopes and downstream reaches at the outlets of all conveyance systems. Element 9: Control Pollutants • Design, install, implement and maintain effective pollution prevention measures to minimize the discharge of pollutants. • Handle and dispose of all pollutants, including waste materials and demolition debris that occur on -site in a manner that does not cause contamination of stormwater. Provide cover, containment, and protection from vandalism for all chemicals, liquid products, petroleum products, and other materials that have the potential to pose a threat to human health or the environment. On -site fueling tanks must include secondary containment. Secondary containment means placing tanks or containers within an impervious structure capable of containing 110% of the volume contained in the largest take within the containment structure. Double -walled tanks do not require additional secondary containment. 11 • Conduct maintenance, fueling, and repair of heavy equipment and vehicles using spill prevention and control measures. Clean contaminated surfaces immediately following any spill incident. • Discharge wheel wash or tire bath wastewater to a separate on -site treatment system that prevents discharge to surface water, such as closed -loop recirculation or upland application, or to the sanitary sewer, with local sewer district approval. • Apply fertilizers and pesticides in a manner and at application rates that will not result in loss of chemical to stormwater runoff. Follow manufacturers' label requirements for application rates and procedures. • Use BMPs to prevent contamination of stormwater runoff by pH modifying sources. The sources for this contamination include, but are not limited to: bulk cement, cement kiln dust, fly ash, new concrete washing and curing waters, waste streams generated from concrete grinding and sawing, exposed aggregate processes, dewatering concrete vaults, concrete pumping and mixer washout waters. • Adjust the pH of stormwater if necessary to prevent violations of water quality standards. • Assure that washout of concrete trucks is performed off -site or in designated concrete washout areas only. Do not wash out concrete trucks onto the ground, or into storm drains, open ditches, streets, or streams. Do not dump excess concrete on -site, except in designated concrete washout areas. Concrete spillage or concrete discharge to surface waters of the State is prohibited. • Obtain written approval from Ecology before using chemical treatment other than CO2 or dry ice to adjust pH. Element 10: Control De -Watering • Discharge foundation, vault, and trench de -watering water, which has similar characteristics to stormwater runoff at the site, into a controlled conveyance system before discharge to a sediment trap or sediment pond. • Discharge clean, non -turbid de -watering water, such as well -point ground water, to systems tributary to, or directly into surface waters of the State, as specified in Element #8, provided the de -watering flow does not cause erosion or flooding of receiving waters. Do not route clean dewatering water through stormwater sediment ponds. Note that "surface waters of the State" may exist on a construction site as well as off site; for example, a creek running through a site. • Handle highly turbid or otherwise contaminated dewatering water separately from stormwater. • Other treatment or disposal options may include: 1. Infiltration. 2. Transport off -site in a vehicle, such as a vacuum flush truck, for legal disposal in a manner that does not pollute state waters. 3. Ecology -approved on -site chemical treatment or other suitable treatment technologies. 4. Sanitary or combined sewer discharge with local sewer district approval, if there is no other option. 5. Use of a sedimentation bag that discharges to a ditch or swale for small volumes of localized dewatering. 12 Element 11: Maintain BMPs • Maintain and repair all temporary and permanent erosion and sediment control BMPs as needed to assure continued performance of their intended function in accordance with BMP specifications. • Remove all temporary erosion and sediment control BMPs within 30 days after achieving final site stabilization or after the temporary BMPs are no longer needed. Element 12: Manage the Project • Phase development projects to the maximum degree practicable and take into account seasonal work limitations. • Inspection and monitoring — Inspect, maintain and repair all BMPs as needed to assure continued performance of their intended function. Projects regulated under the Construction Stormwater General Permit must conduct site inspections and monitoring in accordance with Special Condition S4 of the Construction Stormwater General Permit. • Maintaining an updated construction SWPPP — Maintain, update, and implement the SWPPP. • Projects that disturb one or more acres must have site inspections conducted by a Certified Erosion and Sediment Control Lead (CESCL). Project sites disturbing less than one acre may have a CESCL or a person without CESCL certification conduct inspections. By the initiation of construction, the SWPPP must identify the CESCL or inspector, who must be present on -site or on -call at all times. • The CESCL or inspector (project sites less than one acre) must have the skills to assess the: o Site conditions and construction activities that could impact the quality of stormwater. o Effectiveness of erosion and sediment control measures used to control the quality of stormwater discharges. The CESCL or inspector must examine stormwater visually for the presence of suspended sediment, turbidity, discoloration, and oil sheen. They must evaluate the effectiveness of BMPs and determine if it is necessary to install, maintain, or repair BMPs to improve the quality of stormwater discharges. Based on the results of the inspection, construction site operators must correct the problems identified by: o Reviewing the SWPPP for compliance with the 13 construction SWPPP elements and making appropriate revisions within 7 days of the inspection. o Immediately beginning the process of fully implementing and maintaining appropriate source control and/or treatment BMPs as soon as possible, addressing the problems not later than within 10 days of the inspection. If installation of necessary treatment BMPs is not feasible within 10 days, the construction site operator may request an extension within the initial 10-day response period. o Documenting BMP implementation and maintenance in the site log book (sites larger than 1 acre). The CESCL or inspector must inspect all areas disturbed by construction activities, all BMPs, and all stormwater discharge points at least once every calendar week and within 24 hours of any discharge from the site. (For purposes of this condition, individual discharge events that last more than one day do not require daily inspections. For 13 example, if a stormwater pond discharges continuously over the course of a week, only one inspection is required that week.) The CESCL or inspector may reduce the inspection frequency for temporary stabilized, inactive sites to once every calendar month. Element 13: Protect Low Impact Development BMPs • Protect all Bioretention and Rain Garden BMPs from sedimentation through installation and maintenance of erosion and sediment control BMPs on portions of the site that drain into the Bioretention and/or Rain Garden BMPs. Restore the BMPs to their fully functioning condition if they accumulate sediment during construction. Restoring the BMP must include removal of sediment and any sediment -laden Bioretention/rain garden soils, and replacing the removed soils with soils meeting the design specification. • Prevent compacting Bioretention and rain garden BMPs by excluding construction equipment and foot traffic. Protect completed lawn and landscaped areas from compaction due to construction equipment. • Control erosion and avoid introducing sediment from surrounding land uses onto permeable pavements. Do not allow muddy construction equipment on the base material or pavement. Do not allow sediment -laden runoff onto permeable pavements or base materials. • Pavement fouled with sediments or no longer passing an initial infiltration test must be cleaned using procedures in accordance with this manual or the manufacturer's procedures. • Keep all heavy equipment off existing soils under LID facilities that have been excavated to final grade to retain the infiltration rate of the soils. 6. CONVEYANCE SYSTEM ANALYSIS AND DESIGN The site is drained with pipes ranging in size from four to twelve inches. Given the peak flow rate from the entire site, calculated in Section 4.4, this pipe, installed at a slope of one per cent, can convey the flow from the entire site. Downspouts will be collected to route roof flow to the appropriate downspout infiltration trench. To determine the un-stored flow rate, separate basins were created and routed to a separate point of compliance. These are Basins 4 and 5 which duplicate Basins 2 and 3, respectively. The land distribution is the same, just no detention for Basins 4 and 5. The sum of the two peaks is 0.17 ft3/s, which is given in the WWHM output at the back of this report under POC 3. Manning's equation was used to analise the on -site storm drain pipes. The results are given in Table 5. Line Diameter in Manning's n Slope % Pipe Capacity ft3/s Qioo ft3/s Pass/Fail Offs. 12 0.011 1.000 4.21 0.59 Pass Offshe 12 0.011 1.000 4.21 0.59 Pass Downspouts 4 0.011 2.000 0.32 0.18 Pass Area Drain 4 0.011 2.000 0.32 0.18 Pass Trench Drain 6 0.011 2.000 0.94 0.18 Pass Overflow 8 0.011 1.000 1.43 0.18 Pass 14 Table 5. Conveyance analysis. 7. SPECIAL REPORTS AND STUDIES Geotechnical Report A geotechnical report was prepared for this site by JJA, Inc. The original report, dated 20 October 2018, was followed with three revisions. 8. OTHER PERMITS City of Edmonds Required Permits The City of Edmonds will be the permitting agency for this project. Required permits may include grading, right-of-way, building, electrical, plumbing and demolition permits. 15 References Brown, S.A., et al.; Urban Drainage Design Manual Hydraulic Engineering Circular 22, Third Edition; Federal Highway Administration; Washington, D.C.; September 2009. City of Edmonds; Addendum to Edmonds Community Development Code Chapter 18.30 (Edmonds Stormwater Addendum); City of Edmonds; Edmonds, WA; June, 2017. King County Department of Public Works; Surface Water Design Manual 2016; King County Department of Natural Resources and Parks; Seattle, WA; 2016. Washington Department of Ecology Water Quality Program; Stormwater Management Manual for Western Washington; Washington Department of Ecology; Olympia, WA; December, 2014 17 Appendix A Referenced Materials 19 Figure 1-2.4.1 Flow Chart for Determining Requirements for New Development Start Here Does the site have 35% or more of existing impervious coverage? ITT Does the project result in 5,000 square feet, or greater, of new plus replaced hard surface area? Yes See Redevelopment Minimum Requirements and Flow Chart (Figure 1-2.4.2). Does the project convert 3/ acres or more of vegetation to lawn or landscaped areas, or No convert 2.5 acres or more of native vegetation to pasture? IM Yes Yes Does the project result in 2,000 IF square feet, or greater, of new plus All Minimum Requirements replaced hard surface area? apply to the new and replaced hard surfaces and converted YeS No areas. IF Does the project have land Minimum Requirements #1 disturbing activities of 7,000 through #5 apply to the new Yes square feet or greater? and replaced hard surfaces and the land disturbed. No Minimum Requirement#2 applies. Figure 1-2.4.1 Flow Chart for Determining Requirements for New Development DEPARTMENT OF Revised June2015 ECOLOGYPlease see http.lMwv%.ecy.wa.gou/copyright.html for copyright notice including permissions, State of Washington limitation of liability, and disclaimer. 21 Figure 1-2.4.2 Flow Chart for Determining Requirements for Redevelopment Does the project result in 2,000 square feet, or more, of new plus replaced hard surface area? OR Does the land disturbing activity total 7,000 square feet or greater? Yes lNo Minimum Requirements #1 through #5 apply to the new and replaced hard Minimum Requirement #2 applies. surfaces and the land disturbed. Next Question Does the project add 5,000 square feet or more of new hard surfaces? OR Convert 3/ acres or more of vegetation to lawn or landscaped areas? OR Convert 2.5 acres or more of native vegetation to pasture? Yes No All Minimum Requirements apply Next Question to the new hard surfaces and the Is this a road related project? NO converted vegetation areas. Yes Does the project add 5,000 square feet or more of new hard surfaces 2 Yes No Is the total of new plus replaced hard surfaces Do the new hard 5,000 square feet or more, surfaces add 50% or NO No AND more to the existing No additions Is the value of the proposed improvements hard surfaces within requirements. - including interior improvements - exceed the project limits? 50% of the assessed value (or replacement value) of the existing site improvements? YeS All Minimum Requirements apply to the new and replaced hard surfaces and converted vegetation areas. Yes ama� Figure 1-2.4.2 Flow Chart for Determining Requirements for Redevelopment DEPARTMENT OF Revised June2015 ECOLOGYPlease see http.//www.ecy.wa.gov/copyright.htmifor copyright notice including permissions, State of Washington limitation of liability, and disclaimer. 22 Figure 1-2.5.1 Flow Chart for Determining LID MR #5 Requirements Does the project discharge to Flow Control Exempt Waters (per Minimum Requirement (MR) #7)? Yes REQUIRED: Implement the following BMPs where feasible: BMP T5.13: Post -Construction Soil Quality and Depth BMP T5.10A, B, or C: Downspout Full Infiltration, Downspout Dispersion Systems, or Perforated Stub -out Connections BM P T5.11 or T5.12: Concentrated Flow Dispersion or Sheet Flow Dispersion NOT REQUIRED: Achievement ofthe LID Performance Standard. Applying the other BMPs in List #1 or List #2. No (the Does the project project trigger only MRs #1 - triggered #5? (Per Figure 3.2 or only MR #2) No additional Figure 3.3 in Appendix 1 of the 2013-2018 requirements WVVA Phase II Permit & Phase I Permit). �N_a a project triggered only MRs #1 - #9) Did the project developer choose to meet the LID Performance Standard? Yef No REQUIRED: For each Did the project developer surface, considerthe choose to meet the LID BMPs in the order Performance Standard? listed in List #1 for that type of surface. Use Yes the first BMP that is Yef NO considered feasible. NOT REQUIRED: Achievement of the LID Is the project inside the UGA? No Performance Standard. I REQUIRED: For each surface, consider the BMPs in the order listed in List #2 REQUIRED: Meet the LID Performance Standard through the use of any BMP(s) in for that type of surface. Use the 2014 SWMMWW except for Rain Gardens the first BMP that is (the use of bioretention is acceptable). considered feasible. REQUIRED for ProlectsTriggering MR #1-9*: NOT REQUIRED: Achievement ofthe LID Apply BMP T5.13 Post Construction Soil Quality and Depth. Performance Standard. Applying City of Edmonds SIN Addendum for MR5 Is the project on a parcel of 5 acres or larger? Yes REQUIRED: Meet the LID Performance Standard through the use off BMP(s) in the 2014 SWMMVWV except for Rain Gardens (the use of Bioretention is acceptable). If the project can't meet the LID Performance Standard, it must seek and be granted an exception/variance. REQUIRED: Apply BMP T5.13 Post -Construction Soil Quality and Depth. NOT REQUIRED: Applying the BMPs in List #1 or List #2. *Recommended by Ecology for projects triggering MRs #1 - #5. �..�� Figure 1-2.5.1 Flow Chart for Determining LID MR #5 DEPARTMENT OF Requirements Revised June 2015 ECOLOGYPlease see http://www.ecy.wa.gou/copyright.html for copyright notice including permissions, State of Washington limitation of liability, and disclaimer. 23 Alderwood-Urban land complex, 2 to 8 percent slopes. The Alderwood soil is moderately deep over a hardpan and is moderately well drained. It formed in glacial till. Typically, the surface layer is very dark grayish brown gravelly sandy loam about 7 inches thick. The upper part of the subsoil is dark yellowish brown and dark brown very gravellysandy loam about 23 inches thick. The lower part is olive brown very gravelly sandy loam about 5 inches thick. A weakly cemented hardpan is at a depth of about 35 inches. Depth to the hardpan ranges from 20 to 40 inches. Permeability of the Alderwood soil is moderately rapid above the hardpan and very slow through it. Available water capacity is low. A seasonal perched watertable is at a depth of 18 to 36 inches from Januaryto March. Runoff is slow, and the hazard of water erosion is slight. Zhen Townhome 8029 238th Street SW Edmonds WA 98026 Parcel: 451900102000 Not to Scale USGS SOIL TYPE 2018.10.20 A.2.01 (File#: 18054 JJA -- (206) 786-8645 -- otlieeWUJAmc.biz -- PO Box 181 Auburn WA 98071 24 WWHM2012 PROJECT REPORT The results for are given on page POC 1 17 POC2 28 of this WHMM report. General Model Information Project Name: 20012AE_WWHM Site Name: Site Address: City: Report Date: 5/17/2022 MGS Region: Puget East Data Start: 1901 /10/1 Data End: 2058/09/30 Timestep: 15 Minute DOT Data Number03 Version Date: 2021 /08/18 Version: 4.2.18 POC Thresholds Low Flow Threshold for POC1: 50 Percent of the 2 Year High Flow Threshold for POC1: 50 Year Low Flow Threshold for POC2: 50 Percent of the 2 Year High Flow Threshold for POC2: 50 Year Low Flow Threshold for POC3: 50 Percent of the 2 Year High Flow Threshold for POC3: 50 Year 20012AE_WWHM 5/17/2022 04:28:52 Page 2 Landuse Basin Data Predeveloped Land Use Basin 1 Bypass: No GroundWater: No Pervious Land Use acre C, Pasture, Mod 0.024 Pervious Total 0.024 Impervious Land Use acre PARKING MOD 0.09 Impervious Total 0.09 Basin Total 0.114 Element Flows To: Surface Interflow Groundwater 20012AE_WWHM 5/17/2022 04:28:52 Page 3 Basin 2 Bypass: No GroundWater: No Pervious Land Use acre C, Lawn, Mod 0.127 Pervious Total 0.127 Impervious Land Use acre ROOF TOPS FLAT 0.024 DRIVEWAYS MOD 0.003 SIDEWALKS MOD 0.007 Impervious Total 0.034 Basin Total 0.161 Element Flows To: Surface Interflow Groundwater 20012AE_WWHM 5/17/2022 04:28:52 Page 4 Basin 3 Bypass: No GroundWater: No Pervious Land Use acre C, Lawn, Mod 0.04 Pervious Total 0.04 Impervious Land Use acre DRIVEWAYS MOD 0.017 SIDEWALKS MOD 0.009 Impervious Total 0.026 Basin Total 0.066 Element Flows To: Surface Interflow Groundwater 20012AE_WWHM 5/17/2022 04:28:52 Page 5 Basin 4 Bypass: No GroundWater: No Pervious Land Use acre A B, Lawn, Mod 0.017 Pervious Total 0.017 Impervious Land Use acre ROOF TOPS FLAT 0.098 DRIVEWAYS FLAT 0.046 DRIVEWAYS MOD 0.004 SIDEWALKS FLAT 0.003 PARKING MOD 0.021 Impervious Total 0.172 Basin Total 0.189 Element Flows To: Surface Interflow Groundwater 20012AE_WWHM 5/17/2022 04:28:52 Page 6 Basin 5 Bypass: No GroundWater: No Pervious Land Use acre C, Lawn, Mod 0.02 Pervious Total 0.02 Impervious Land Use acre ROADS MOD 0.027 DRIVEWAYS MOD 0.001 SIDEWALKS MOD 0.009 Impervious Total 0.037 Basin Total 0.057 Element Flows To: Surface Interflow Groundwater 20012AE_WWHM 5/17/2022 04:28:52 Page 7 Mitigated Land Use Basin 1 Bypass: No GroundWater: No Pervious Land Use acre A B, Lawn, Mod 0.013 Pervious Total 0.013 Impervious Land Use acre SIDEWALKS MOD 0.008 PARKING MOD 0.081 Impervious Total 0.089 Basin Total 0.102 Element Flows To: Surface Interflow Groundwater 20012AE_WWHM 5/17/2022 04:28:52 Page 8 Basin 2 Bypass: No GroundWater: No Pervious Land Use acre A B, Lawn, Mod 0.019 Pervious Total 0.019 Impervious Land Use acre ROOF TOPS FLAT 0.098 DRIVEWAYS FLAT 0.046 SIDEWALKS FLAT 0.002 SIDEWALKS MOD 0.003 PARKING MOD 0.021 Impervious Total 0.17 Basin Total 0.189 Element Flows To: Surface Interflow Tank 1 Groundwater 20012AE_WWHM 5/17/2022 04:28:52 Page 9 Basin 3 Bypass: No GroundWater: No Pervious Land Use acre C, Lawn, Mod 0.028 Pervious Total 0.028 Impervious Land Use acre ROADS MOD 0.032 DRIVEWAYS MOD 0.01 SIDEWALKS MOD 0.012 Impervious Total 0.054 Basin Total 0.082 Element Flows To: Surface Interflow Tank 1 Groundwater 20012AE_WWHM 5/17/2022 04:28:52 Page 10 Basin 4 Bypass: No GroundWater: No Pervious Land Use acre A B, Lawn, Mod 0.017 Pervious Total 0.017 Impervious Land Use acre ROOF TOPS FLAT 0.098 DRIVEWAYS FLAT 0.046 DRIVEWAYS MOD 0.004 SIDEWALKS FLAT 0.003 PARKING MOD 0.021 Impervious Total 0.172 Basin Total 0.189 Element Flows To: Surface Interflow Groundwater 20012AE_WWHM 5/17/2022 04:28:52 Page 11 Basin 5 Bypass: No GroundWater: No Pervious Land Use acre C, Lawn, Mod 0.02 Pervious Total 0.02 Impervious Land Use acre ROADS MOD 0.027 DRIVEWAYS MOD 0.001 SIDEWALKS MOD 0.009 Impervious Total 0.037 Basin Total 0.057 Element Flows To: Surface Interflow Groundwater 20012AE_WWHM 5/17/2022 04:28:52 Page 12 Routing Elements Predeveloped Routing 20012AE_WWHM 5/17/2022 04:28:52 Page 13 Mitigated Routing Tank 1 Dimensions Depth: Tank Type: Diameter: Length: Discharge Structure Riser Height: Riser Diameter: Notch Type: Notch Width: Notch Height: Orifice 1 Diameter: Element Flows To: Outlet 1 5 ft. Circular 5 ft. 80 ft. 4.9 ft. 8 in. Rectangular 0.000 ft. 0.000 ft. 0.46875 iElevation:0 ft. Outlet 2 Tank Hydraulic Table Stage(feet) Area(ac.) Volume(ac-ft.) Discharge(cfs) Infilt(cfs) 0.0000 0.000000 0.000000 0.000 0.000 0.0556 0.001925 0.000071 0.001 0.000 0.1111 0.002707 0.000201 0.002 0.000 0.1667 0.003297 0.000369 0.002 0.000 0.2222 0.003785 0.000566 0.002 0.000 0.2778 0.004207 0.000788 0.003 0.000 0.3333 0.004581 0.001032 0.003 0.000 0.3889 0.004919 0.001296 0.003 0.000 0.4444 0.005227 0.001578 0.004 0.000 0.5000 0.005510 0.001877 0.004 0.000 0.5556 0.005772 0.002190 0.004 0.000 0.6111 0.006015 0.002518 0.004 0.000 0.6667 0.006243 0.002858 0.004 0.000 0.7222 0.006456 0.003211 0.005 0.000 0.7778 0.006656 0.003575 0.005 0.000 0.8333 0.006844 0.003950 0.005 0.000 0.8889 0.007022 0.004336 0.005 0.000 0.9444 0.007189 0.004730 0.005 0.000 1.0000 0.007346 0.005134 0.006 0.000 1.0556 0.007495 0.005547 0.006 0.000 1.1111 0.007635 0.005967 0.006 0.000 1.1667 0.007768 0.006395 0.006 0.000 1.2222 0.007893 0.006830 0.006 0.000 1.2778 0.008011 0.007272 0.006 0.000 1.3333 0.008122 0.007720 0.006 0.000 1.3889 0.008226 0.008174 0.007 0.000 1.4444 0.008324 0.008634 0.007 0.000 1.5000 0.008416 0.009099 0.007 0.000 1.5556 0.008502 0.009569 0.007 0.000 1.6111 0.008583 0.010043 0.007 0.000 1.6667 0.008658 0.010522 0.007 0.000 1.7222 0.008727 0.011005 0.007 0.000 1.7778 0.008791 0.011492 0.008 0.000 1.8333 0.008850 0.011982 0.008 0.000 1.8889 0.008904 0.012475 0.008 0.000 20012AE_WWHM 5/17/2022 04:28:52 Page 14 1.9444 0.008953 0.012971 0.008 0.000 2.0000 0.008997 0.013470 0.008 0.000 2.0556 0.009036 0.013971 0.008 0.000 2.1111 0.009071 0.014474 0.008 0.000 2.1667 0.009101 0.014978 0.008 0.000 2.2222 0.009126 0.015485 0.008 0.000 2.2778 0.009146 0.015992 0.009 0.000 2.3333 0.009162 0.016501 0.009 0.000 2.3889 0.009174 0.017010 0.009 0.000 2.4444 0.009180 0.017520 0.009 0.000 2.5000 0.009183 0.018030 0.009 0.000 2.5556 0.009180 0.018540 0.009 0.000 2.6111 0.009174 0.019050 0.009 0.000 2.6667 0.009162 0.019560 0.009 0.000 2.7222 0.009146 0.020068 0.009 0.000 2.7778 0.009126 0.020576 0.009 0.000 2.8333 0.009101 0.021082 0.010 0.000 2.8889 0.009071 0.021587 0.010 0.000 2.9444 0.009036 0.022090 0.010 0.000 3.0000 0.008997 0.022591 0.010 0.000 3.0556 0.008953 0.023089 0.010 0.000 3.1111 0.008904 0.023586 0.010 0.000 3.1667 0.008850 0.024079 0.010 0.000 3.2222 0.008791 0.024569 0.010 0.000 3.2778 0.008727 0.025055 0.010 0.000 3.3333 0.008658 0.025538 0.010 0.000 3.3889 0.008583 0.026017 0.011 0.000 3.4444 0.008502 0.026492 0.011 0.000 3.5000 0.008416 0.026962 0.011 0.000 3.5556 0.008324 0.027427 0.011 0.000 3.6111 0.008226 0.027887 0.011 0.000 3.6667 0.008122 0.028341 0.011 0.000 3.7222 0.008011 0.028789 0.011 0.000 3.7778 0.007893 0.029231 0.011 0.000 3.8333 0.007768 0.029666 0.011 0.000 3.8889 0.007635 0.030094 0.011 0.000 3.9444 0.007495 0.030514 0.011 0.000 4.0000 0.007346 0.030926 0.011 0.000 4.0556 0.007189 0.031330 0.012 0.000 4.1111 0.007022 0.031725 0.012 0.000 4.1667 0.006844 0.032110 0.012 0.000 4.2222 0.006656 0.032485 0.012 0.000 4.2778 0.006456 0.032849 0.012 0.000 4.3333 0.006243 0.033202 0.012 0.000 4.3889 0.006015 0.033543 0.012 0.000 4.4444 0.005772 0.033870 0.012 0.000 4.5000 0.005510 0.034184 0.012 0.000 4.5556 0.005227 0.034482 0.012 0.000 4.6111 0.004919 0.034764 0.012 0.000 4.6667 0.004581 0.035028 0.012 0.000 20012AE_WWHM 5/17/2022 04:28:52 Page 15 20012AE_WWHM 5/17/2022 04:28:52 Page 16 Analysis Results POC 1 n F 0.05 — U 0.04 0 iL 0.03 0.01 10E-5 10E-4 10E3 10E-2 10E-1 1 1r_i loll Percent Time Exceetlir�g + Predeveloped Predeveloped Landuse Totals for POC #1 Total Pervious Area- 0.024 Total Impervious Area- 0.09 Mitigated Landuse Totals for POC #1 Total Pervious Area- 0.013 Total Impervious Area- 0.089 Cumulative Pmbabilkl 0.i . 0. 0.m 0.0a OS 1 2 5 10 211 30 50 70 80 90 95 95 99 99.5 1 x Mitigated Flow Frequency Method- Log Pearson Type III 17B Flow Frequency Return Periods for Predeveloped. POC #1 Return Period Flow(cfs) 2 year 0.028863 5 year 0.038922 10 year 0.046411 25 year 0.05686 50 year 0.065392 100 year 0.074595 Flow Frequency Return Periods for Mitigated. POC #1 Return Period Flow(cfs) 2 year 0.028485 5 year 0.038342 10 year 0.045669 25 year 0.055881 50 year 0.064211 100 year 0.073188 Annual Peaks Annual Peaks for Predeveloped and Mitigated. POC #1 Year Predeveloped Mitigated 1902 0.033 0.033 1903 0.036 0.036 1904 0.039 0.039 1905 0.021 0.020 1906 0.025 0.025 1907 0.028 0.028 1908 0.023 0.023 1909 0.030 0.029 1910 0.025 0.025 1911 0.031 0.031 20012AE_WWHM 5/17/2022 04:28:52 Page 17 1912 0.053 0.052 1913 0.026 0.026 1914 0.082 0.081 1915 0.019 0.019 1916 0.037 0.036 1917 0.017 0.017 1918 0.028 0.028 1919 0.017 0.017 1920 0.026 0.026 1921 0.019 0.019 1922 0.029 0.029 1923 0.024 0.024 1924 0.040 0.040 1925 0.017 0.017 1926 0.035 0.035 1927 0.029 0.028 1928 0.021 0.021 1929 0.037 0.037 1930 0.045 0.044 1931 0.019 0.019 1932 0.023 0.022 1933 0.022 0.022 1934 0.034 0.034 1935 0.019 0.019 1936 0.028 0.028 1937 0.036 0.035 1938 0.019 0.019 1939 0.026 0.025 1940 0.046 0.046 1941 0.048 0.047 1942 0.033 0.033 1943 0.031 0.030 1944 0.042 0.042 1945 0.034 0.033 1946 0.026 0.025 1947 0.020 0.020 1948 0.025 0.024 1949 0.046 0.046 1950 0.024 0.024 1951 0.045 0.044 1952 0.044 0.043 1953 0.040 0.039 1954 0.025 0.025 1955 0.027 0.027 1956 0.019 0.019 1957 0.024 0.024 1958 0.029 0.029 1959 0.027 0.027 1960 0.023 0.023 1961 0.064 0.063 1962 0.028 0.028 1963 0.019 0.018 1964 0.062 0.061 1965 0.037 0.037 1966 0.023 0.023 1967 0.033 0.033 1968 0.026 0.026 1969 0.022 0.021 20012AE_WWHM 5/17/2022 04:30:03 Page 18 1970 0.028 0.028 1971 0.025 0.025 1972 0.102 0.099 1973 0.054 0.054 1974 0.037 0.036 1975 0.037 0.037 1976 0.039 0.038 1977 0.018 0.018 1978 0.027 0.027 1979 0.029 0.028 1980 0.033 0.032 1981 0.036 0.035 1982 0.023 0.023 1983 0.032 0.031 1984 0.029 0.029 1985 0.036 0.035 1986 0.018 0.018 1987 0.034 0.034 1988 0.019 0.019 1989 0.027 0.027 1990 0.023 0.022 1991 0.034 0.034 1992 0.033 0.033 1993 0.039 0.038 1994 0.025 0.025 1995 0.018 0.018 1996 0.026 0.026 1997 0.023 0.023 1998 0.027 0.026 1999 0.033 0.033 2000 0.028 0.027 2001 0.036 0.035 2002 0.042 0.041 2003 0.027 0.027 2004 0.035 0.035 2005 0.074 0.073 2006 0.028 0.028 2007 0.034 0.034 2008 0.028 0.028 2009 0.023 0.023 2010 0.028 0.028 2011 0.030 0.030 2012 0.026 0.025 2013 0.030 0.029 2014 0.024 0.024 2015 0.060 0.058 2016 0.024 0.024 2017 0.041 0.041 2018 0.027 0.027 2019 0.040 0.039 2020 0.033 0.032 2021 0.028 0.027 2022 0.038 0.037 2023 0.048 0.048 2024 0.060 0.057 2025 0.040 0.040 2026 0.037 0.037 2027 0.037 0.037 20012AE_WWHM 5/17/2022 04:30:03 Page 19 2028 0.016 0.016 2029 0.020 0.020 2030 0.046 0.046 2031 0.016 0.016 2032 0.025 0.024 2033 0.025 0.025 2034 0.020 0.020 2035 0.026 0.026 2036 0.023 0.023 2037 0.032 0.032 2038 0.026 0.026 2039 0.053 0.052 2040 0.024 0.023 2041 0.026 0.025 2042 0.037 0.037 2043 0.039 0.039 2044 0.026 0.026 2045 0.022 0.021 2046 0.020 0.020 2047 0.028 0.028 2048 0.023 0.023 2049 0.037 0.037 2050 0.021 0.021 2051 0.034 0.033 2052 0.028 0.028 2053 0.024 0.023 2054 0.048 0.046 2055 0.031 0.030 2056 0.038 0.038 2057 0.019 0.019 2058 0.035 0.035 Ranked Annual Peaks Ranked Annual Peaks for Predeveloped and Mitigated. POC #1 Rank Predeveloped Mitigated 1 0.1019 0.0990 2 0.0823 0.0813 3 0.0736 0.0725 4 0.0638 0.0629 5 0.0623 0.0606 6 0.0604 0.0577 7 0.0597 0.0571 8 0.0542 0.0536 9 0.0528 0.0522 10 0.0527 0.0521 11 0.0483 0.0477 12 0.0478 0.0471 13 0.0477 0.0463 14 0.0465 0.0460 15 0.0464 0.0459 16 0.0460 0.0455 17 0.0450 0.0445 18 0.0449 0.0444 19 0.0440 0.0428 20 0.0423 0.0418 21 0.0419 0.0409 22 0.0411 0.0406 23 0.0403 0.0398 20012AE_WWHM 5/17/2022 04:30:03 Page 20 24 0.0403 0.0398 25 0.0402 0.0395 26 0.0398 0.0390 27 0.0394 0.0387 28 0.0391 0.0386 29 0.0389 0.0384 30 0.0388 0.0381 31 0.0383 0.0379 32 0.0377 0.0373 33 0.0374 0.0369 34 0.0374 0.0368 35 0.0373 0.0368 36 0.0373 0.0368 37 0.0373 0.0366 38 0.0370 0.0366 39 0.0370 0.0366 40 0.0366 0.0362 41 0.0366 0.0361 42 0.0361 0.0356 43 0.0358 0.0354 44 0.0358 0.0354 45 0.0356 0.0352 46 0.0356 0.0351 47 0.0354 0.0350 48 0.0352 0.0348 49 0.0350 0.0346 50 0.0343 0.0339 51 0.0343 0.0339 52 0.0343 0.0339 53 0.0337 0.0337 54 0.0337 0.0332 55 0.0336 0.0332 56 0.0334 0.0329 57 0.0334 0.0329 58 0.0333 0.0329 59 0.0331 0.0327 60 0.0329 0.0325 61 0.0327 0.0322 62 0.0325 0.0320 63 0.0322 0.0318 64 0.0316 0.0312 65 0.0311 0.0307 66 0.0307 0.0303 67 0.0306 0.0303 68 0.0299 0.0295 69 0.0298 0.0294 70 0.0295 0.0292 71 0.0294 0.0290 72 0.0291 0.0286 73 0.0289 0.0286 74 0.0288 0.0285 75 0.0287 0.0283 76 0.0285 0.0281 77 0.0285 0.0281 78 0.0284 0.0281 79 0.0283 0.0279 80 0.0283 0.0278 81 0.0281 0.0277 20012AE_WWHM 5/17/2022 04:30:03 Page 21 82 0.0280 0.0277 83 0.0280 0.0277 84 0.0279 0.0276 85 0.0279 0.0276 86 0.0278 0.0274 87 0.0276 0.0272 88 0.0275 0.0271 89 0.0274 0.0271 90 0.0272 0.0269 91 0.0270 0.0268 92 0.0270 0.0267 93 0.0268 0.0265 94 0.0266 0.0262 95 0.0265 0.0260 96 0.0263 0.0259 97 0.0263 0.0259 98 0.0262 0.0259 99 0.0260 0.0256 100 0.0259 0.0256 101 0.0259 0.0256 102 0.0257 0.0253 103 0.0256 0.0253 104 0.0255 0.0252 105 0.0255 0.0252 106 0.0255 0.0251 107 0.0254 0.0251 108 0.0254 0.0251 109 0.0253 0.0250 110 0.0250 0.0247 111 0.0249 0.0246 112 0.0247 0.0244 113 0.0246 0.0243 114 0.0244 0.0240 115 0.0242 0.0239 116 0.0240 0.0237 117 0.0239 0.0237 118 0.0239 0.0236 119 0.0237 0.0234 120 0.0237 0.0234 121 0.0234 0.0232 122 0.0233 0.0231 123 0.0233 0.0230 124 0.0231 0.0229 125 0.0231 0.0229 126 0.0231 0.0228 127 0.0230 0.0227 128 0.0229 0.0227 129 0.0227 0.0224 130 0.0227 0.0224 131 0.0223 0.0220 132 0.0217 0.0214 133 0.0217 0.0214 134 0.0213 0.0210 135 0.0209 0.0206 136 0.0206 0.0204 137 0.0203 0.0201 138 0.0203 0.0201 139 0.0202 0.0200 20012AE_WWHM 5/17/2022 04:30:03 Page 22 140 0.0200 0.0197 141 0.0194 0.0192 142 0.0193 0.0191 143 0.0192 0.0189 144 0.0191 0.0189 145 0.0189 0.0187 146 0.0189 0.0187 147 0.0189 0.0187 148 0.0188 0.0185 149 0.0187 0.0185 150 0.0182 0.0180 151 0.0179 0.0177 152 0.0179 0.0177 153 0.0174 0.0171 154 0.0173 0.0171 155 0.0173 0.0171 156 0.0162 0.0160 157 0.0159 0.0157 20012AE_WWHM 5/17/2022 04:30:03 Page 23 Duration Flows The Facility PASSED Flow(cfs) Predev Mit Percentage Pass/Fail 0.0144 6408 6089 95 Pass 0.0149 5588 5336 95 Pass 0.0155 4868 4650 95 Pass 0.0160 4264 4072 95 Pass 0.0165 3674 3435 93 Pass 0.0170 3125 2931 93 Pass 0.0175 2627 2486 94 Pass 0.0180 2283 2177 95 Pass 0.0185 2051 1974 96 Pass 0.0191 1876 1798 95 Pass 0.0196 1709 1644 96 Pass 0.0201 1572 1503 95 Pass 0.0206 1415 1344 94 Pass 0.0211 1282 1232 96 Pass 0.0216 1173 1113 94 Pass 0.0222 1060 1010 95 Pass 0.0227 981 935 95 Pass 0.0232 895 851 95 Pass 0.0237 826 779 94 Pass 0.0242 746 715 95 Pass 0.0247 691 649 93 Pass 0.0252 627 583 92 Pass 0.0258 561 536 95 Pass 0.0263 518 488 94 Pass 0.0268 472 446 94 Pass 0.0273 429 403 93 Pass 0.0278 392 351 89 Pass 0.0283 341 328 96 Pass 0.0288 321 309 96 Pass 0.0294 303 285 94 Pass 0.0299 280 266 95 Pass 0.0304 262 253 96 Pass 0.0309 250 237 94 Pass 0.0314 235 225 95 Pass 0.0319 226 210 92 Pass 0.0324 208 202 97 Pass 0.0330 196 181 92 Pass 0.0335 178 170 95 Pass 0.0340 168 159 94 Pass 0.0345 157 152 96 Pass 0.0350 150 138 92 Pass 0.0355 138 129 93 Pass 0.0361 128 117 91 Pass 0.0366 117 111 94 Pass 0.0371 109 99 90 Pass 0.0376 98 96 97 Pass 0.0381 95 89 93 Pass 0.0386 89 83 93 Pass 0.0391 81 78 96 Pass 20012AE_WWHM 5/17/2022 04:30:03 Page 24 0.0417 61 57 93 Pass 0.0422 55 53 96 Pass 0.0427 53 52 98 Pass 0.0433 53 49 92 Pass 0.0438 50 46 92 Pass 0.0443 46 45 97 Pass 0.0448 46 41 89 Pass 0.0453 41 40 97 Pass 0.0458 40 39 97 Pass 0.0463 39 33 84 Pass 0.0469 35 32 91 Pass 0.0474 35 29 82 Pass 0.0479 30 26 86 Pass 0.0484 28 26 92 Pass 0.0489 27 26 96 Pass 0.0494 26 26 100 Pass 0.0499 26 25 96 Pass 0.0505 26 21 80 Pass 0.0510 23 21 91 Pass 0.0515 23 21 91 Pass 0.0520 22 20 90 Pass 0.0525 21 18 85 Pass 0.0530 18 17 94 Pass 0.0536 18 17 94 Pass 0.0541 18 16 88 Pass 0.0546 16 16 100 Pass 0.0551 16 16 100 Pass 0.0556 16 15 93 Pass 0.0561 16 15 93 Pass 0.0566 16 15 93 Pass 0.0572 16 14 87 Pass 0.0577 15 14 93 Pass 0.0582 15 12 80 Pass 0.0587 15 12 80 Pass 0.0592 14 12 85 Pass 0.0597 13 11 84 Pass 0.0602 12 11 91 Pass 0.0608 11 10 90 Pass 0.0613 11 10 90 Pass 0.0618 11 10 90 Pass 0.0623 10 9 90 Pass 0.0628 10 9 90 Pass 0.0633 9 8 88 Pass 0.0638 8 8 100 Pass 0.0644 8 8 100 Pass 0.0649 8 8 100 Pass 0.0654 8 8 100 Pass 20012AE_WWHM 5/17/2022 04:30:03 Page 25 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. 20012AE_WWHM 5/17/2022 04:30:03 Page 26 LID Report LID Technique Used for Total Volume Volume Infiltration Cumulative Percent Water Quality Percent Comment Treatment? Needs Through Volume Volume Volume Water Quality Treatment Facility (ac-ft) Infiltration Infiltrated Treated (ac-ft) (ac-ft) Credit Total Volume Infiltrated 0.00 0.00 0.00 0.00 0.00 0% No Treat. Credit Compliance with LID Duration Standard 8% of 2-yr to 50% of Analysis 2 yr Result= Passed 20012AE_WWHM 5/17/2022 04:30:03 Page 27 POC 2 1.0 Cumulative Pmbabi ily � Il LL + 0m 0a+ 10E-5 1064 10E3 10E@ 10E4 1 If, 100 0.o0i Dam Percent Time Exceetlir�9 0.5 7 2 5 70 20 30 60 70 80 90 95 98 99 99.5 1 + Predeveloped x Mitigated Predeveloped Landuse Totals for POC #2 Total Pervious Area: 0.167 Total Impervious Area: 0.06 Mitigated Landuse Totals for POC #2 Total Pervious Area: 0.047 Total Impervious Area: 0.224 Flow Frequency Method: Log Pearson Type III 17B Flow Frequency Return Periods for Predeveloped. POC #2 Return Period Flow(cfs) 2 year 0.022035 5 year 0.034195 10 year 0.044715 25 year 0.061361 50 year 0.076585 100 year 0.094585 Flow Frequency Return Periods for Mitigated. POC #2 Return Period Flow(cfs) 2 year 0.009764 5 year 0.015133 10 year 0.019966 25 year 0.027882 50 year 0.035355 100 year 0.04443 Annual Peaks Annual Peaks for Predeveloped and Mitigated. POC #2 Year Predeveloped Mitigated 1902 0.022 0.010 1903 0.025 0.009 1904 0.043 0.009 1905 0.014 0.010 1906 0.016 0.008 1907 0.024 0.011 1908 0.018 0.009 1909 0.020 0.010 1910 0.023 0.010 1911 0.024 0.009 1912 0.080 0.011 20012AE_WWHM 5/17/2022 04:32:20 Page 28 1913 0.016 0.010 1914 0.103 0.009 1915 0.013 0.008 1916 0.024 0.009 1917 0.012 0.009 1918 0.019 0.010 1919 0.012 0.008 1920 0.022 0.009 1921 0.014 0.009 1922 0.026 0.011 1923 0.020 0.010 1924 0.028 0.008 1925 0.012 0.008 1926 0.023 0.009 1927 0.019 0.009 1928 0.016 0.009 1929 0.031 0.011 1930 0.034 0.010 1931 0.014 0.009 1932 0.017 0.009 1933 0.016 0.009 1934 0.042 0.012 1935 0.013 0.008 1936 0.022 0.010 1937 0.031 0.011 1938 0.013 0.009 1939 0.017 0.008 1940 0.035 0.010 1941 0.031 0.008 1942 0.030 0.011 1943 0.024 0.009 1944 0.039 0.101 1945 0.025 0.010 1946 0.021 0.008 1947 0.014 0.009 1948 0.019 0.013 1949 0.034 0.040 1950 0.015 0.009 1951 0.028 0.008 1952 0.063 0.064 1953 0.052 0.060 1954 0.019 0.009 1955 0.016 0.008 1956 0.013 0.007 1957 0.017 0.009 1958 0.026 0.041 1959 0.025 0.010 1960 0.015 0.008 1961 0.074 0.012 1962 0.020 0.010 1963 0.012 0.008 1964 0.082 0.009 1965 0.038 0.012 1966 0.017 0.009 1967 0.032 0.008 1968 0.018 0.010 1969 0.016 0.009 1970 0.026 0.010 20012AE_WWHM 5/17/2022 04:33:43 Page 29 1971 0.024 0.012 1972 0.155 0.011 1973 0.037 0.012 1974 0.030 0.010 1975 0.049 0.011 1976 0.042 0.010 1977 0.012 0.008 1978 0.026 0.011 1979 0.024 0.009 1980 0.030 0.008 1981 0.028 0.009 1982 0.017 0.008 1983 0.026 0.011 1984 0.024 0.009 1985 0.037 0.010 1986 0.012 0.009 1987 0.024 0.013 1988 0.014 0.009 1989 0.017 0.009 1990 0.017 0.010 1991 0.029 0.010 1992 0.022 0.010 1993 0.027 0.010 1994 0.019 0.012 1995 0.012 0.007 1996 0.023 0.012 1997 0.017 0.009 1998 0.021 0.010 1999 0.022 0.008 2000 0.022 0.009 2001 0.023 0.008 2002 0.055 0.009 2003 0.017 0.010 2004 0.027 0.010 2005 0.069 0.009 2006 0.019 0.008 2007 0.027 0.011 2008 0.021 0.009 2009 0.016 0.009 2010 0.020 0.011 2011 0.019 0.007 2012 0.019 0.012 2013 0.024 0.009 2014 0.016 0.008 2015 0.087 0.010 2016 0.016 0.007 2017 0.030 0.043 2018 0.027 0.070 2019 0.045 0.099 2020 0.034 0.009 2021 0.023 0.010 2022 0.036 0.008 2023 0.033 0.009 2024 0.087 0.010 2025 0.025 0.009 2026 0.029 0.011 2027 0.028 0.009 2028 0.010 0.008 20012AE_WWHM 5/17/2022 04:33:43 Page 30 2029 0.015 0.009 2030 0.041 0.012 2031 0.011 0.008 2032 0.017 0.007 2033 0.016 0.007 2034 0.015 0.010 2035 0.021 0.039 2036 0.017 0.010 2037 0.021 0.009 2038 0.026 0.011 2039 0.036 0.008 2040 0.017 0.009 2041 0.019 0.009 2042 0.025 0.070 2043 0.026 0.010 2044 0.021 0.011 2045 0.017 0.009 2046 0.015 0.010 2047 0.019 0.008 2048 0.016 0.010 2049 0.027 0.010 2050 0.016 0.009 2051 0.032 0.011 2052 0.019 0.010 2053 0.016 0.010 2054 0.065 0.011 2055 0.019 0.008 2056 0.028 0.009 2057 0.013 0.009 2058 0.024 0.008 Ranked Annual Peaks Ranked Annual Peaks for Predeveloped and Rank Predeveloped Mitigated 1 0.1547 0.1008 2 0.1025 0.0990 3 0.0872 0.0700 4 0.0868 0.0700 5 0.0823 0.0639 6 0.0804 0.0603 7 0.0742 0.0431 8 0.0689 0.0409 9 0.0650 0.0399 10 0.0631 0.0388 11 0.0552 0.0127 12 0.0525 0.0127 13 0.0489 0.0121 14 0.0445 0.0120 15 0.0434 0.0119 16 0.0420 0.0119 17 0.0419 0.0118 18 0.0407 0.0118 19 0.0395 0.0117 20 0.0382 0.0117 21 0.0372 0.0115 22 0.0366 0.0115 23 0.0359 0.0115 24 0.0359 0.0114 Mitigated. POC #2 20012AE_WWHM 5/17/2022 04:33:43 Page 31 25 0.0352 0.0114 26 0.0345 0.0114 27 0.0340 0.0113 28 0.0336 0.0112 29 0.0331 0.0112 30 0.0322 0.0111 31 0.0318 0.0109 32 0.0314 0.0108 33 0.0314 0.0108 34 0.0306 0.0107 35 0.0304 0.0107 36 0.0303 0.0106 37 0.0302 0.0106 38 0.0301 0.0105 39 0.0293 0.0105 40 0.0285 0.0105 41 0.0283 0.0104 42 0.0279 0.0104 43 0.0279 0.0104 44 0.0276 0.0104 45 0.0275 0.0103 46 0.0269 0.0103 47 0.0267 0.0102 48 0.0266 0.0102 49 0.0266 0.0102 50 0.0265 0.0102 51 0.0264 0.0102 52 0.0264 0.0101 53 0.0263 0.0101 54 0.0262 0.0100 55 0.0259 0.0100 56 0.0258 0.0099 57 0.0256 0.0099 58 0.0251 0.0099 59 0.0249 0.0098 60 0.0247 0.0098 61 0.0247 0.0098 62 0.0247 0.0098 63 0.0245 0.0098 64 0.0239 0.0097 65 0.0239 0.0097 66 0.0239 0.0097 67 0.0239 0.0097 68 0.0239 0.0097 69 0.0237 0.0097 70 0.0236 0.0097 71 0.0235 0.0097 72 0.0235 0.0097 73 0.0234 0.0096 74 0.0232 0.0095 75 0.0231 0.0095 76 0.0227 0.0094 77 0.0226 0.0094 78 0.0221 0.0094 79 0.0221 0.0094 80 0.0220 0.0094 81 0.0218 0.0094 82 0.0217 0.0093 20012AE_WWHM 5/17/2022 04:33:43 Page 32 83 0.0216 0.0093 84 0.0213 0.0093 85 0.0213 0.0093 86 0.0211 0.0092 87 0.0210 0.0092 88 0.0209 0.0092 89 0.0207 0.0092 90 0.0201 0.0092 91 0.0201 0.0092 92 0.0197 0.0091 93 0.0195 0.0091 94 0.0195 0.0091 95 0.0195 0.0091 96 0.0195 0.0090 97 0.0191 0.0090 98 0.0191 0.0090 99 0.0191 0.0090 100 0.0190 0.0090 101 0.0188 0.0090 102 0.0188 0.0090 103 0.0187 0.0090 104 0.0187 0.0089 105 0.0186 0.0089 106 0.0181 0.0089 107 0.0178 0.0089 108 0.0175 0.0089 109 0.0174 0.0089 110 0.0174 0.0089 111 0.0173 0.0088 112 0.0173 0.0088 113 0.0173 0.0088 114 0.0173 0.0088 115 0.0170 0.0088 116 0.0170 0.0088 117 0.0169 0.0088 118 0.0169 0.0087 119 0.0167 0.0087 120 0.0166 0.0087 121 0.0164 0.0087 122 0.0162 0.0086 123 0.0162 0.0085 124 0.0161 0.0084 125 0.0160 0.0084 126 0.0159 0.0084 127 0.0158 0.0084 128 0.0158 0.0084 129 0.0158 0.0084 130 0.0157 0.0083 131 0.0156 0.0083 132 0.0155 0.0083 133 0.0155 0.0082 134 0.0154 0.0082 135 0.0153 0.0082 136 0.0151 0.0082 137 0.0149 0.0082 138 0.0147 0.0081 139 0.0141 0.0081 140 0.0140 0.0081 20012AE_WWHM 5/17/2022 04:33:43 Page 33 141 0.0139 0.0081 142 0.0137 0.0080 143 0.0136 0.0080 144 0.0133 0.0079 145 0.0131 0.0079 146 0.0127 0.0078 147 0.0127 0.0078 148 0.0126 0.0078 149 0.0125 0.0077 150 0.0124 0.0077 151 0.0122 0.0075 152 0.0120 0.0075 153 0.0120 0.0073 154 0.0119 0.0072 155 0.0118 0.0072 156 0.0106 0.0071 157 0.0104 0.0071 20012AE_WWHM 5/17/2022 04:33:43 Page 34 Duration Flows The Facility PASSED Flow(cfs) Predev Mit Percentage Pass/Fail 0.0110 3689 2345 63 Pass 0.0117 2910 1048 36 Pass 0.0123 2345 534 22 Pass 0.0130 1933 243 12 Pass 0.0137 1680 172 10 Pass 0.0143 1468 170 11 Pass 0.0150 1278 161 12 Pass 0.0157 1108 159 14 Pass 0.0163 959 158 16 Pass 0.0170 846 156 18 Pass 0.0176 750 151 20 Pass 0.0183 654 151 23 Pass 0.0190 582 147 25 Pass 0.0196 517 141 27 Pass 0.0203 470 139 29 Pass 0.0210 419 137 32 Pass 0.0216 382 134 35 Pass 0.0223 339 130 38 Pass 0.0229 308 127 41 Pass 0.0236 273 125 45 Pass 0.0243 245 124 50 Pass 0.0249 219 118 53 Pass 0.0256 205 115 56 Pass 0.0263 190 113 59 Pass 0.0269 168 113 67 Pass 0.0276 159 110 69 Pass 0.0282 149 109 73 Pass 0.0289 144 102 70 Pass 0.0296 139 99 71 Pass 0.0302 130 97 74 Pass 0.0309 119 93 78 Pass 0.0315 111 89 80 Pass 0.0322 108 83 76 Pass 0.0329 106 75 70 Pass 0.0335 101 68 67 Pass 0.0342 96 66 68 Pass 0.0349 94 60 63 Pass 0.0355 88 54 61 Pass 0.0362 81 54 66 Pass 0.0368 79 52 65 Pass 0.0375 72 50 69 Pass 0.0382 71 45 63 Pass 0.0388 64 42 65 Pass 0.0395 62 40 64 Pass 0.0402 61 37 60 Pass 0.0408 58 34 58 Pass 0.0415 57 32 56 Pass 0.0421 54 30 55 Pass 0.0428 54 30 55 Pass 20012AE_WWHM 5/17/2022 04:33:43 Page 35 0.0461 45 25 55 Pass 0.0468 42 25 59 Pass 0.0474 42 23 54 Pass 0.0481 42 22 52 Pass 0.0488 40 21 52 Pass 0.0494 38 20 52 Pass 0.0501 36 20 55 Pass 0.0508 35 20 57 Pass 0.0514 34 20 58 Pass 0.0521 34 20 58 Pass 0.0527 33 20 60 Pass 0.0534 33 20 60 Pass 0.0541 32 19 59 Pass 0.0547 32 19 59 Pass 0.0554 30 19 63 Pass 0.0561 28 19 67 Pass 0.0567 28 19 67 Pass 0.0574 27 19 70 Pass 0.0580 27 18 66 Pass 0.0587 26 18 69 Pass 0.0594 26 16 61 Pass 0.0600 25 15 60 Pass 0.0607 23 13 56 Pass 0.0614 23 13 56 Pass 0.0620 23 13 56 Pass 0.0627 23 12 52 Pass 0.0633 22 12 54 Pass 0.0640 21 11 52 Pass 0.0647 21 11 52 Pass 0.0653 20 11 55 Pass 0.0660 20 10 50 Pass 0.0667 20 10 50 Pass 0.0673 20 9 45 Pass 0.0680 20 9 45 Pass 0.0686 17 9 52 Pass 0.0693 16 9 56 Pass 0.0700 16 9 56 Pass 0.0706 16 6 37 Pass 0.0713 15 6 40 Pass 0.0719 15 6 40 Pass 0.0726 15 6 40 Pass 0.0733 15 6 40 Pass 0.0739 15 6 40 Pass 0.0746 13 6 46 Pass 0.0753 13 6 46 Pass 0.0759 11 6 54 Pass 0.0766 10 6 60 Pass 20012AE_WWHM 5/17/2022 04:33:43 Page 36 Water Quality Water Quality BMP Flow and Volume for POC #2 On-line facility volume: 0 acre-feet On-line facility target flow: 0 cfs. Adjusted for 15 min: 0 cfs. Off-line facility target flow: 0 cfs. Adjusted for 15 min: 0 cfs. 20012AE_WWHM 5/17/2022 04:33:43 Page 37 LID Report LID Technique Used for Total Volume Volume Infiltration Cumulative Percent Water Quality Percent Comment Treatment? Needs Through Volume Volume Volume Water Quality Treatment Facility (ac-ft) Infiltration Infiltrated Treated (ac-ft) (ac-ft) Credit Tank 1 POC ❑ 77.90 ❑ 0.00 Total Volume Infiltrated 77.90 0.00 0.00 0.00 0.00 0% No Treat. Credit Duration Compliance with LID Analysis Standard 8% of 2-yr to 50% of Result= 2 yr Failed 20012AE_WWHM 5/17/2022 04:33:43 Page 38 POC 3 0.15 n F 0.12 U 0.09 O J 0.06 0.10E-5 10E 4 10E-3 10E-2 10E-1 1 if, 1C4i Percent Time Exce�dir�g + Predeveloped Predeveloped Landuse Totals for POC #3 Total Pervious Area- 0.037 Total Impervious Area- 0.209 Mitigated Landuse Totals for POC #3 Total Pervious Area- 0.037 Total Impervious Area- 0.209 Cumulative Pmbabilily oa LL ool 05 1 2 x Mitigated Flow Frequency Method- Log Pearson Type III 17B Flow Frequency Return Periods for Predeveloped. POC #3 Return Period Flow(cfs) 2 year 0.064488 5 year 0.087493 10 year 0.104699 25 year 0.1288 50 year 0.148549 100 year 0.169906 Flow Frequency Return Periods for Mitigated. POC #3 Return Period Flow(cfs) 2 year 0.064488 5 year 0.087493 10 year 0.104699 25 year 0.1288 50 year 0.148549 100 year 0.169906 Annual Peaks Annual Peaks for Predeveloped and Mitigated. POC #3 Year Predeveloped Mitigated 1902 0.075 0.075 1903 0.082 0.082 1904 0.091 0.091 1905 0.045 0.045 1906 0.050 0.050 1907 0.059 0.059 1908 0.053 0.053 1909 0.068 0.068 1910 0.058 0.058 1911 0.070 0.070 1912 0.124 0.124 a.m 5 10 20 30 50 70 80 90 95 95 99 99.5 1 20012AE_WWHM 5/17/2022 04:33:43 Page 39 1913 0.048 0.048 1914 0.192 0.192 1915 0.042 0.042 1916 0.081 0.081 1917 0.039 0.039 1918 0.063 0.063 1919 0.038 0.038 1920 0.055 0.055 1921 0.042 0.042 1922 0.063 0.063 1923 0.053 0.053 1924 0.089 0.089 1925 0.039 0.039 1926 0.080 0.080 1927 0.061 0.061 1928 0.049 0.049 1929 0.086 0.086 1930 0.102 0.102 1931 0.043 0.043 1932 0.052 0.052 1933 0.050 0.050 1934 0.079 0.079 1935 0.044 0.044 1936 0.061 0.061 1937 0.075 0.075 1938 0.043 0.043 1939 0.059 0.059 1940 0.103 0.103 1941 0.102 0.102 1942 0.076 0.076 1943 0.071 0.071 1944 0.099 0.099 1945 0.077 0.077 1946 0.058 0.058 1947 0.046 0.046 1948 0.057 0.057 1949 0.106 0.106 1950 0.048 0.048 1951 0.094 0.094 1952 0.104 0.104 1953 0.095 0.095 1954 0.056 0.056 1955 0.049 0.049 1956 0.043 0.043 1957 0.055 0.055 1958 0.064 0.064 1959 0.063 0.063 1960 0.050 0.050 1961 0.150 0.150 1962 0.061 0.061 1963 0.042 0.042 1964 0.140 0.140 1965 0.081 0.081 1966 0.052 0.052 1967 0.072 0.072 1968 0.054 0.054 1969 0.049 0.049 1970 0.065 0.065 20012AE_WWHM 5/17/2022 04:35:05 Page 40 1971 0.060 0.060 1972 0.238 0.238 1973 0.123 0.123 1974 0.084 0.084 1975 0.088 0.088 1976 0.089 0.089 1977 0.039 0.039 1978 0.063 0.063 1979 0.066 0.066 1980 0.073 0.073 1981 0.079 0.079 1982 0.052 0.052 1983 0.072 0.072 1984 0.067 0.067 1985 0.080 0.080 1986 0.040 0.040 1987 0.077 0.077 1988 0.043 0.043 1989 0.058 0.058 1990 0.051 0.051 1991 0.073 0.073 1992 0.072 0.072 1993 0.089 0.089 1994 0.055 0.055 1995 0.040 0.040 1996 0.060 0.060 1997 0.052 0.052 1998 0.061 0.061 1999 0.075 0.075 2000 0.064 0.064 2001 0.078 0.078 2002 0.097 0.097 2003 0.056 0.056 2004 0.081 0.081 2005 0.163 0.163 2006 0.061 0.061 2007 0.078 0.078 2008 0.064 0.064 2009 0.051 0.051 2010 0.065 0.065 2011 0.062 0.062 2012 0.059 0.059 2013 0.064 0.064 2014 0.052 0.052 2015 0.133 0.133 2016 0.052 0.052 2017 0.095 0.095 2018 0.062 0.062 2019 0.092 0.092 2020 0.076 0.076 2021 0.064 0.064 2022 0.088 0.088 2023 0.109 0.109 2024 0.136 0.136 2025 0.080 0.080 2026 0.077 0.077 2027 0.083 0.083 2028 0.035 0.035 20012AE_WWHM 5/17/2022 04:35:05 Page 41 2029 0.046 0.046 2030 0.103 0.103 2031 0.036 0.036 2032 0.054 0.054 2033 0.056 0.056 2034 0.047 0.047 2035 0.060 0.060 2036 0.051 0.051 2037 0.072 0.072 2038 0.061 0.061 2039 0.119 0.119 2040 0.054 0.054 2041 0.059 0.059 2042 0.082 0.082 2043 0.085 0.085 2044 0.059 0.059 2045 0.050 0.050 2046 0.047 0.047 2047 0.064 0.064 2048 0.054 0.054 2049 0.085 0.085 2050 0.048 0.048 2051 0.079 0.079 2052 0.062 0.062 2053 0.054 0.054 2054 0.108 0.108 2055 0.063 0.063 2056 0.083 0.083 2057 0.042 0.042 2058 0.081 0.081 Ranked Annual Peaks Ranked Annual Peaks for Predeveloped and Rank Predeveloped Mitigated 1 0.2377 0.2377 2 0.1915 0.1915 3 0.1628 0.1628 4 0.1503 0.1503 5 0.1405 0.1405 6 0.1365 0.1365 7 0.1327 0.1327 8 0.1237 0.1237 9 0.1226 0.1226 10 0.1189 0.1189 11 0.1089 0.1089 12 0.1083 0.1083 13 0.1062 0.1062 14 0.1038 0.1038 15 0.1034 0.1034 16 0.1029 0.1029 17 0.1024 0.1024 18 0.1015 0.1015 19 0.0987 0.0987 20 0.0973 0.0973 21 0.0953 0.0953 22 0.0949 0.0949 23 0.0939 0.0939 24 0.0917 0.0917 Mitigated. POC #3 20012AE_WWHM 5/17/2022 04:35:05 Page 42 25 0.0911 0.0911 26 0.0892 0.0892 27 0.0890 0.0890 28 0.0890 0.0890 29 0.0884 0.0884 30 0.0880 0.0880 31 0.0859 0.0859 32 0.0853 0.0853 33 0.0850 0.0850 34 0.0842 0.0842 35 0.0834 0.0834 36 0.0831 0.0831 37 0.0819 0.0819 38 0.0816 0.0816 39 0.0813 0.0813 40 0.0810 0.0810 41 0.0806 0.0806 42 0.0806 0.0806 43 0.0803 0.0803 44 0.0802 0.0802 45 0.0797 0.0797 46 0.0789 0.0789 47 0.0788 0.0788 48 0.0787 0.0787 49 0.0781 0.0781 50 0.0777 0.0777 51 0.0774 0.0774 52 0.0772 0.0772 53 0.0768 0.0768 54 0.0759 0.0759 55 0.0756 0.0756 56 0.0749 0.0749 57 0.0749 0.0749 58 0.0748 0.0748 59 0.0732 0.0732 60 0.0728 0.0728 61 0.0725 0.0725 62 0.0725 0.0725 63 0.0725 0.0725 64 0.0718 0.0718 65 0.0710 0.0710 66 0.0704 0.0704 67 0.0679 0.0679 68 0.0675 0.0675 69 0.0658 0.0658 70 0.0651 0.0651 71 0.0647 0.0647 72 0.0643 0.0643 73 0.0641 0.0641 74 0.0639 0.0639 75 0.0637 0.0637 76 0.0637 0.0637 77 0.0636 0.0636 78 0.0633 0.0633 79 0.0631 0.0631 80 0.0631 0.0631 81 0.0627 0.0627 82 0.0626 0.0626 20012AE_WWHM 5/17/2022 04:35:05 Page 43 83 0.0622 0.0622 84 0.0621 0.0621 85 0.0620 0.0620 86 0.0615 0.0615 87 0.0615 0.0615 88 0.0614 0.0614 89 0.0614 0.0614 90 0.0612 0.0612 91 0.0610 0.0610 92 0.0599 0.0599 93 0.0597 0.0597 94 0.0595 0.0595 95 0.0594 0.0594 96 0.0594 0.0594 97 0.0593 0.0593 98 0.0590 0.0590 99 0.0586 0.0586 100 0.0585 0.0585 101 0.0580 0.0580 102 0.0577 0.0577 103 0.0565 0.0565 104 0.0563 0.0563 105 0.0560 0.0560 106 0.0556 0.0556 107 0.0553 0.0553 108 0.0551 0.0551 109 0.0547 0.0547 110 0.0543 0.0543 111 0.0543 0.0543 112 0.0537 0.0537 113 0.0537 0.0537 114 0.0535 0.0535 115 0.0534 0.0534 116 0.0532 0.0532 117 0.0524 0.0524 118 0.0524 0.0524 119 0.0523 0.0523 120 0.0521 0.0521 121 0.0518 0.0518 122 0.0515 0.0515 123 0.0512 0.0512 124 0.0509 0.0509 125 0.0508 0.0508 126 0.0504 0.0504 127 0.0500 0.0500 128 0.0497 0.0497 129 0.0496 0.0496 130 0.0492 0.0492 131 0.0491 0.0491 132 0.0488 0.0488 133 0.0484 0.0484 134 0.0482 0.0482 135 0.0482 0.0482 136 0.0469 0.0469 137 0.0467 0.0467 138 0.0465 0.0465 139 0.0464 0.0464 140 0.0452 0.0452 20012AE_WWHM 5/17/2022 04:35:05 Page 44 141 0.0440 0.0440 142 0.0435 0.0435 143 0.0431 0.0431 144 0.0430 0.0430 145 0.0427 0.0427 146 0.0422 0.0422 147 0.0419 0.0419 148 0.0419 0.0419 149 0.0418 0.0418 150 0.0404 0.0404 151 0.0395 0.0395 152 0.0393 0.0393 153 0.0393 0.0393 154 0.0387 0.0387 155 0.0381 0.0381 156 0.0363 0.0363 157 0.0351 0.0351 20012AE_WWHM 5/17/2022 04:35:05 Page 45 Duration Flows The Facility PASSED Flow(cfs) Predev Mit Percentage Pass/Fail 0.0322 6133 6133 100 Pass 0.0334 5343 5343 100 Pass 0.0346 4648 4648 100 Pass 0.0358 4041 4041 100 Pass 0.0369 3510 3510 100 Pass 0.0381 3040 3040 100 Pass 0.0393 2625 2625 100 Pass 0.0405 2283 2283 100 Pass 0.0416 2035 2035 100 Pass 0.0428 1837 1837 100 Pass 0.0440 1679 1679 100 Pass 0.0452 1541 1541 100 Pass 0.0463 1405 1405 100 Pass 0.0475 1278 1278 100 Pass 0.0487 1148 1148 100 Pass 0.0499 1032 1032 100 Pass 0.0510 958 958 100 Pass 0.0522 863 863 100 Pass 0.0534 777 777 100 Pass 0.0546 723 723 100 Pass 0.0557 659 659 100 Pass 0.0569 600 600 100 Pass 0.0581 545 545 100 Pass 0.0593 492 492 100 Pass 0.0604 448 448 100 Pass 0.0616 411 411 100 Pass 0.0628 371 371 100 Pass 0.0640 339 339 100 Pass 0.0651 312 312 100 Pass 0.0663 281 281 100 Pass 0.0675 264 264 100 Pass 0.0687 249 249 100 Pass 0.0698 231 231 100 Pass 0.0710 218 218 100 Pass 0.0722 202 202 100 Pass 0.0734 181 181 100 Pass 0.0745 170 170 100 Pass 0.0757 158 158 100 Pass 0.0769 149 149 100 Pass 0.0781 139 139 100 Pass 0.0792 132 132 100 Pass 0.0804 125 125 100 Pass 0.0816 114 114 100 Pass 0.0828 105 105 100 Pass 0.0839 101 101 100 Pass 0.0851 93 93 100 Pass 0.0863 85 85 100 Pass 0.0875 82 82 100 Pass 0.0886 78 78 100 Pass 20012AE_WWHM 5/17/2022 04:35:05 Page 46 0.0945 58 58 100 Pass 0.0957 54 54 100 Pass 0.0969 51 51 100 Pass 0.0980 50 50 100 Pass 0.0992 46 46 100 Pass 0.1004 42 42 100 Pass 0.1016 39 39 100 Pass 0.1027 36 36 100 Pass 0.1039 33 33 100 Pass 0.1051 33 33 100 Pass 0.1063 31 31 100 Pass 0.1074 31 31 100 Pass 0.1086 29 29 100 Pass 0.1098 26 26 100 Pass 0.1110 26 26 100 Pass 0.1121 26 26 100 Pass 0.1133 25 25 100 Pass 0.1145 24 24 100 Pass 0.1157 22 22 100 Pass 0.1168 22 22 100 Pass 0.1180 22 22 100 Pass 0.1192 20 20 100 Pass 0.1204 20 20 100 Pass 0.1215 20 20 100 Pass 0.1227 18 18 100 Pass 0.1239 17 17 100 Pass 0.1251 17 17 100 Pass 0.1262 16 16 100 Pass 0.1274 15 15 100 Pass 0.1286 14 14 100 Pass 0.1298 14 14 100 Pass 0.1309 14 14 100 Pass 0.1321 14 14 100 Pass 0.1333 13 13 100 Pass 0.1345 11 11 100 Pass 0.1356 11 11 100 Pass 0.1368 10 10 100 Pass 0.1380 9 9 100 Pass 0.1392 9 9 100 Pass 0.1403 9 9 100 Pass 0.1415 8 8 100 Pass 0.1427 8 8 100 Pass 0.1438 8 8 100 Pass 0.1450 8 8 100 Pass 0.1462 7 7 100 Pass 0.1474 7 7 100 Pass 0.1485 7 7 100 Pass 20012AE_WWHM 5/17/2022 04:35:05 Page 47 Water Quality Water Quality BMP Flow and Volume for POC #3 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. 20012AE_WWHM 5/17/2022 04:35:05 Page 48 LID Report LID Technique Used for Total Volume Volume Infiltration Cumulative Percent Water Quality Percent Comment Treatment? Needs Through Volume Volume Volume Water Quality Treatment Facility (ac-ft) Infiltration Infiltrated Treated (ac-ft) (ac-ft) Credit Total Volume Infiltrated 0.00 0.00 0.00 0.00 0.00 0% No Treat. Credit Compliance with LID Duration Standard 8% of 2-yr to 50% of Analysis 2 yr Result = Failed 20012AE_WWHM 5/17/2022 04:35:05 Page 49 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. 20012AE_WWHM 5/17/2022 04:35:05 Page 50 Appendix Predeveloped Schematic L j Basin _ Basin L,,-j Basin 3 L 0.11ac L2 0.16a �2 0.07a Basin Basin 5 L 0.19a 6 0.06ac 20012AE_WWHM 5/17/2022 04:35:05 Page 51 Mitigated Schematic Basin L 0.10ac Basin L,,_j Basin I5 's 0.19ac 0.06a Basin , Basin 3 0. 1 9ac 0.08ac Tank ti 20012AE_WWHM 5/17/2022 04:35:06 Page 52 Predeveloped UCI File RUN GLOBAL WWHM4 model simulation START 1901 10 01 END 2058 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 20012AE WWHM.wdm MESSU 25 Pre20012AE_WWHM.MES 27 Pre20012AE_WWHM.L61 28 Pre20012AE_WWHM.L62 30 POC20012AE_WWHM1.dat 31 POC20012AE_WWHM2.dat 32 POC20012AE_WWHM3.dat END FILES OPN SEQUENCE INGRP INDELT 00:15 PERLND 14 IMPLND 12 PERLND 17 IMPLND 4 IMPLND 6 IMPLND 9 PERLND 8 IMPLND 5 IMPLND 8 IMPLND 2 COPY 501 COPY 502 COPY 503 DISPLY 1 DISPLY 2 DISPLY 3 END INGRP END OPN SEQUENCE DISPLY DISPLY-INFO1 # - #<---------- Title ----------- >***TRAN PIVL DIG1 FIL1 PYR DIG2 FIL2 YRND 1 Basin 1 MAX 1 2 30 9 2 Basin 2 MAX 1 2 31 9 3 Basin 4 MAX 1 2 32 9 END DISPLY-INFO1 END DISPLY COPY TIMESERIES # - # NPT NMN *** 1 1 1 501 1 1 502 1 1 503 1 1 END TIMESERIES END COPY GENER OPCODE # # OPCD *** END OPCODE PARM # # K *** END PARM END GENER PERLND GEN-INFO 20012AE_WWHM 5/17/2022 04:35:06 Page 53 <PLS ><------- Name ------- >NBLKS Unit -systems Printer *** # - # User t-series Engl Metr *** in out *** 14 C, Pasture, Mod 1 1 1 1 27 0 17 C, Lawn, Mod 1 1 1 1 27 0 8 A/B, Lawn, Mod 1 1 1 1 27 0 END GEN-INFO *** Section PWATER*** ACTIVITY <PLS > ************* Active Sections ***************************** # - # ATMP SNOW PWAT SED PST PWG PQAL MSTL PEST NITR PHOS TRAC *** 14 0 0 1 0 0 0 0 0 0 0 0 0 17 0 0 1 0 0 0 0 0 0 0 0 0 8 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 ********* 14 0 0 4 0 0 0 0 0 0 0 0 0 1 9 17 0 0 4 0 0 0 0 0 0 0 0 0 1 9 8 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 *** 14 0 0 0 0 0 0 0 0 0 0 0 17 0 0 0 0 0 0 0 0 0 0 0 8 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 14 0 4.5 0.06 400 0.1 0.5 0.996 17 0 4.5 0.03 400 0.1 0.5 0.996 8 0 5 0.8 400 0.1 0.3 0.996 END PWAT-PARM2 PWAT-PARM3 <PLS > PWATER input info: Part 3 *** # - # ***PETMAX PETMIN INFEXP INFILD DEEPFR BASETP AGWETP 14 0 0 2 2 0 0 0 17 0 0 2 2 0 0 0 8 0 0 2 2 0 0 0 END PWAT-PARM3 PWAT-PARM4 <PLS > PWATER input info: Part 4 *** # - # CEPSC UZSN NSUR INTFW IRC LZETP *** 14 0.15 0.4 0.3 6 0.5 0.4 17 0.1 0.25 0.25 6 0.5 0.25 8 0.1 0.5 0.25 0 0.7 0.25 END PWAT-PARM4 PWAT-STATEI <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 14 0 0 0 0 2.5 1 17 0 0 0 0 2.5 1 8 0 0 0 0 3 1 END PWAT-STATEI END PERLND IMPLND GEN-INFO <PLS ><------- Name ------- > 20012AE_WWHM Unit -systems Printer *** 5/17/2022 04:35:06 GWVS 0 0 0 Page 54 User t-series Engl Metr *** in out *** 12 PARKING/MOD 1 1 1 27 0 4 ROOF TOPS/FLAT 1 1 1 27 0 6 DRIVEWAYS/MOD 1 1 1 27 0 9 SIDEWALKS/MOD 1 1 1 27 0 5 DRIVEWAYS/FLAT 1 1 1 27 0 8 SIDEWALKS/FLAT 1 1 1 27 0 2 ROADS/MOD 1 1 1 27 0 END GEN-INFO *** Section IWATER*** ACTIVITY <PLS > ************* Active Sections ***************************** # - # ATMP SNOW IWAT SLD IWG IQAL *** 12 0 0 1 0 0 0 4 0 0 1 0 0 0 6 0 0 1 0 0 0 9 0 0 1 0 0 0 5 0 0 1 0 0 0 8 0 0 1 0 0 0 2 0 0 1 0 0 0 END ACTIVITY PRINT -INFO <ILS > ******** Print -flags ******** PIVL PYR # - # ATMP SNOW IWAT SLD IWG IQAL ********* 12 0 0 4 0 0 0 1 9 4 0 0 4 0 0 0 1 9 6 0 0 4 0 0 0 1 9 9 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 2 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 *** 12 0 0 0 0 0 4 0 0 0 0 0 6 0 0 0 0 0 9 0 0 0 0 0 5 0 0 0 0 0 8 0 0 0 0 0 2 0 0 0 0 0 END IWAT-PARM1 IWAT-PARM2 <PLS > IWATER input info: Part 2 *** # - # *** LSUR SLSUR NSUR RETSC 12 400 0.05 0.1 0.08 4 400 0.01 0.1 0.1 6 400 0.05 0.1 0.08 9 400 0.05 0.1 0.08 5 400 0.01 0.1 0.1 8 400 0.01 0.1 0.1 2 400 0.05 0.1 0.08 END IWAT-PARM2 IWAT-PARM3 <PLS > IWATER input info: Part 3 *** # - # ***PETMAX PETMIN 12 0 0 4 0 0 6 0 0 9 0 0 5 0 0 8 0 0 2 0 0 20012AE_WWHM 5/17/2022 04:35:06 Page 55 END IWAT-PARM3 IWAT-STATEI <PLS > *** Initial conditions at start of simulation # - # *** RETS SURS 12 0 0 4 0 0 6 0 0 9 0 0 5 0 0 8 0 0 2 0 0 END IWAT-STATEI END IMPLND SCHEMATIC <-Source-> <--Area--> <-Target-> MBLK *** <Name> # <-factor-> <Name> # Tbl# *** Basin 1*** PERLND 14 0.024 COPY 501 12 IMPLND 12 0.09 COPY 501 15 Basin 2*** PERLND 17 0.127 COPY 502 12 IMPLND 4 0.024 COPY 502 15 IMPLND 6 0.003 COPY 502 15 IMPLND 9 0.007 COPY 502 15 Basin 3*** PERLND 17 0.04 COPY 502 12 IMPLND 6 0.017 COPY 502 15 IMPLND 9 0.009 COPY 502 15 Basin 4*** PERLND 8 0.017 COPY 503 12 IMPLND 4 0.098 COPY 503 15 IMPLND 5 0.046 COPY 503 15 IMPLND 6 0.004 COPY 503 15 IMPLND 8 0.003 COPY 503 15 IMPLND 12 0.021 COPY 503 15 Basin 5*** PERLND 17 0.02 COPY 503 12 IMPLND 2 0.027 COPY 503 15 IMPLND 6 0.001 COPY 503 15 IMPLND 9 0.009 COPY 503 15 ******Routing****** END SCHEMATIC NETWORK <-Volume-> <-Grp> <-Member-><--Mult-->Tran <-Target vols> <-Grp> <-Member-> *** <Name> # <Name> # #<-factor->strg <Name> # # <Name> # # *** COPY 501 OUTPUT MEAN 1 1 48.4 DISPLY 1 INPUT TIMSER 1 COPY 502 OUTPUT MEAN 1 1 48.4 DISPLY 2 INPUT TIMSER 1 COPY 503 OUTPUT MEAN 1 1 48.4 DISPLY 3 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 ***************************** 20012AE_WWHM 5/17/2022 04:35:06 Page 56 # - # 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 Al 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 DIV PERLND 1 999 EXTNL PREC WDM 2 PREC ENGL 1 DIV IMPLND 1 999 EXTNL PREC WDM 1 EVAP ENGL 0.76 PERLND 1 999 EXTNL PETINP WDM 1 EVAP ENGL 0.76 IMPLND 1 999 EXTNL PETINP END EXT SOURCES EXT TARGETS <-Volume-> <-Grp> <-Member-><--Mult-->Tran <-Volume-> <Member> Tsys Tgap Amd *** <Name> # <Name> # #<-factor->strg <Name> # <Name> tem strg strg*** COPY 501 OUTPUT MEAN 1 1 48.4 WDM 501 FLOW ENGL REPL COPY 502 OUTPUT MEAN 1 1 48.4 WDM 502 FLOW ENGL REPL COPY 503 OUTPUT MEAN 1 1 48.4 WDM 503 FLOW ENGL REPL END EXT TARGETS MASS -LINK <Volume> <-Grp> <-Member-><--Mult--> <Name> <Name> # #<-factor-> MASS -LINK 12 PERLND PWATER SURD 0.083333 END MASS -LINK 12 MASS -LINK 15 IMPLND IWATER SURO END MASS -LINK 15 END MASS -LINK END RUN 0.083333 <Target> <Name> COPY COPY <-Grp> <-Member->*** <Name> # #*** INPUT MEAN INPUT MEAN 20012AE_WWHM 5/17/2022 04:35:06 Page 57 Mitigated UC/ File RUN GLOBAL WWHM4 model simulation START 1901 10 01 END 2058 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 20012AE WWHM.wdm MESSU 25 Mit20012AE_WWHM.MES 27 Mit20012AE_WWHM.L61 28 Mit20012AE_WWHM.L62 30 POC20012AE_WWHM1.dat 32 POC20012AE_WWHM3.dat 31 POC20012AE WWHM2.dat END FILES OPN SEQUENCE INGRP INDELT 00:15 PERLND 8 IMPLND 9 IMPLND 12 IMPLND 4 IMPLND 5 IMPLND 8 PERLND 17 IMPLND 2 IMPLND 6 RCHRES 1 COPY 501 COPY 503 COPY 2 COPY 502 DISPLY 1 DISPLY 3 DISPLY 2 END INGRP END OPN SEQUENCE DISPLY DISPLY-INFO1 # - #<---------- Title ----------- >***TRAN PIVL DIG1 FIL1 PYR DIG2 FIL2 YRND 1 Basin 1 MAX 1 2 30 9 3 Basin 4 MAX 1 2 32 9 2 Tank 1 MAX 1 2 31 9 END DISPLY-INFO1 END DISPLY COPY TIMESERIES # - # NPT NMN *** 1 1 1 501 1 1 503 1 1 2 1 1 502 1 1 END TIMESERIES END COPY GENER OPCODE # # OPCD *** END OPCODE PARM # # K *** END PARM END GENER 20012AE_WWHM 5/17/2022 04:35:06 Page 58 PERLND GEN-INFO <PLS ><------- Name ------- >NBLKS Unit -systems Printer *** # - # User t-series Engl Metr *** in out *** 8 A/B, Lawn, Mod 1 1 1 1 27 0 17 C, Lawn, Mod 1 1 1 1 27 0 END GEN-INFO *** Section PWATER*** ACTIVITY <PLS > ************* Active Sections ***************************** # - # ATMP SNOW PWAT SED PST PWG PQAL MSTL PEST NITR PHOS TRAC *** 8 0 0 1 0 0 0 0 0 0 0 0 0 17 0 0 1 0 0 0 0 0 0 0 0 0 END ACTIVITY PRINT -INFO <PLS > ***************** Print -flags ***************************** PIVL PYR # - # ATMP SNOW PWAT SED PST PWG PQAL MSTL PEST NITR PHOS TRAC ********* 8 0 0 4 0 0 0 0 0 0 0 0 0 1 9 17 0 0 4 0 0 0 0 0 0 0 0 0 1 9 END PRINT -INFO PWAT-PARM1 <PLS > PWATER variable monthly parameter value flags *** # - # CSNO RTOP UZFG VCS VUZ VNN VIFW VIRC VLE INFC HWT *** 8 0 0 0 0 0 0 0 0 0 0 0 17 0 0 0 0 0 0 0 0 0 0 0 END PWAT-PARM1 PWAT-PARM2 <PLS > PWATER input info: Part 2 *** # - # ***FOREST LZSN INFILT LSUR SLSUR KVARY AGWRC 8 0 5 0.8 400 0.1 0.3 0.996 17 0 4.5 0.03 400 0.1 0.5 0.996 END PWAT-PARM2 PWAT-PARM3 <PLS > PWATER input info: Part 3 *** # - # ***PETMAX PETMIN INFEXP INFILD DEEPFR BASETP AGWETP 8 0 0 2 2 0 0 0 17 0 0 2 2 0 0 0 END PWAT-PARM3 PWAT-PARM4 <PLS > PWATER input info: Part 4 *** # - # CEPSC UZSN NSUR INTFW IRC LZETP *** 8 0.1 0.5 0.25 0 0.7 0.25 17 0.1 0.25 0.25 6 0.5 0.25 END PWAT-PARM4 PWAT-STATEI <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 8 0 0 0 0 3 1 0 17 0 0 0 0 2.5 1 0 END PWAT-STATEI END PERLND IMPLND GEN-INFO <PLS ><------- Name ------- > 9 SIDEWALKS/MOD 12 PARKING/MOD 4 ROOF TOPS/FLAT 5 DRIVEWAYS/FLAT Unit -systems Printer *** User t-series Engl Metr *** in out *** 1 1 1 27 0 1 1 1 27 0 1 1 1 27 0 1 1 1 27 0 20012AE_WWHM 5/17/2022 04:35:06 Page 59 8 SIDEWALKS/FLAT 1 1 1 27 0 2 ROADS/MOD 1 1 1 27 0 6 DRIVEWAYS/MOD 1 1 1 27 0 END GEN-INFO *** Section IWATER*** ACTIVITY <PLS > ************* Active Sections ***************************** # - # ATMP SNOW IWAT SLD IWG IQAL *** 9 0 0 1 0 0 0 12 0 0 1 0 0 0 4 0 0 1 0 0 0 5 0 0 1 0 0 0 8 0 0 1 0 0 0 2 0 0 1 0 0 0 6 0 0 1 0 0 0 END ACTIVITY PRINT -INFO <ILS > ******** Print -flags ******** PIVL PYR # - # ATMP SNOW IWAT SLD IWG IQAL ********* 9 0 0 4 0 0 0 1 9 12 0 0 4 0 0 0 1 9 4 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 2 0 0 4 0 0 0 1 9 6 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 *** 9 0 0 0 0 0 12 0 0 0 0 0 4 0 0 0 0 0 5 0 0 0 0 0 8 0 0 0 0 0 2 0 0 0 0 0 6 0 0 0 0 0 END IWAT-PARM1 IWAT-PARM2 <PLS > IWATER input info: Part 2 *** # - # *** LSUR SLSUR NSUR RETSC 9 400 0.05 0.1 0.08 12 400 0.05 0.1 0.08 4 400 0.01 0.1 0.1 5 400 0.01 0.1 0.1 8 400 0.01 0.1 0.1 2 400 0.05 0.1 0.08 6 400 0.05 0.1 0.08 END IWAT-PARM2 IWAT-PARM3 <PLS > IWATER input info: Part 3 *** # - # ***PETMAX PETMIN 9 0 0 12 0 0 4 0 0 5 0 0 8 0 0 2 0 0 6 0 0 END IWAT-PARM3 IWAT-STATEI <PLS > *** Initial conditions at start of simulation # - # *** RETS SURS 9 0 0 20012AE_WWHM 5/17/2022 04:35:06 Page 60 12 0 0 4 0 0 5 0 0 8 0 0 2 0 0 6 0 0 END IWAT-STATEI END IMPLND SCHEMATIC <-Source-> <--Area--> <-Target-> MBLK *** <Name> # <-factor-> <Name> # Tbl# *** Basin 2*** PERLND 8 0.019 RCHRES 1 2 IMPLND 4 0.098 RCHRES 1 5 IMPLND 5 0.046 RCHRES 1 5 IMPLND 8 0.002 RCHRES 1 5 IMPLND 9 0.003 RCHRES 1 5 IMPLND 12 0.021 RCHRES 1 5 Basin 3*** PERLND 17 0.028 RCHRES 1 2 IMPLND 2 0.032 RCHRES 1 5 IMPLND 6 0.01 RCHRES 1 5 IMPLND 9 0.012 RCHRES 1 5 Basin 1*** PERLND 8 0.013 COPY 501 12 IMPLND 9 0.008 COPY 501 15 IMPLND 12 0.081 COPY 501 15 Basin 4*** PERLND 8 0.017 COPY 503 12 IMPLND 4 0.098 COPY 503 15 IMPLND 5 0.046 COPY 503 15 IMPLND 6 0.004 COPY 503 15 IMPLND 8 0.003 COPY 503 15 IMPLND 12 0.021 COPY 503 15 Basin 5*** PERLND 17 0.02 COPY 503 12 IMPLND 2 0.027 COPY 503 15 IMPLND 6 0.001 COPY 503 15 IMPLND 9 0.009 COPY 503 15 ******Routing****** PERLND 8 0.019 COPY 2 12 IMPLND 4 0.098 COPY 2 15 IMPLND 5 0.046 COPY 2 15 IMPLND 8 0.002 COPY 2 15 IMPLND 9 0.003 COPY 2 15 IMPLND 12 0.021 COPY 2 15 PERLND 17 0.028 COPY 2 12 IMPLND 2 0.032 COPY 2 15 IMPLND 6 0.01 COPY 2 15 IMPLND 9 0.012 COPY 2 15 RCHRES 1 1 COPY 502 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 COPY 503 OUTPUT MEAN 1 1 48.4 DISPLY 3 INPUT TIMSER 1 COPY 502 OUTPUT MEAN 1 1 48.4 DISPLY 2 INPUT TIMSER 1 <-Volume-> <-Grp> <-Member-><--Mult-->Tran <-Target vols> <-Grp> <-Member-> *** <Name> # <Name> # #<-factor->strg <Name> # # <Name> # # *** END NETWORK RCHRES 20012AE_WWHM 5/17/2022 04:35:06 Page 61 GEN-INFO RCHRES Name Nexits Unit Systems Printer *** # - #<------------------ >< --- > User T-series Engl Metr LKFG *** in out *** 1 Tank 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 RCHRES Flags for each HYDR Section *** # - # VC Al 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 91 4 Depth Area Volume Outflowl Velocity Travel Time*** (ft) (acres) (acre-ft) (cfs) (ft/sec) (Minutes)*** 0.000000 0.000000 0.000000 0.000000 0.055556 0.001925 0.000071 0.001405 0.111111 0.002707 0.000201 0.001988 0.166667 0.003297 0.000369 0.002434 0.222222 0.003785 0.000566 0.002811 0.277778 0.004207 0.000788 0.003143 0.333333 0.004581 0.001032 0.003443 0.388889 0.004919 0.001296 0.003718 0.444444 0.005227 0.001578 0.003975 0.500000 0.005510 0.001877 0.004216 0.555556 0.005772 0.002190 0.004444 0.611111 0.006015 0.002518 0.004661 0.666667 0.006243 0.002858 0.004869 0.722222 0.006456 0.003211 0.005067 0.777778 0.006656 0.003575 0.005259 0.833333 0.006844 0.003950 0.005443 0.888889 0.007022 0.004336 0.005622 0.944444 0.007189 0.004730 0.005795 1.000000 0.007346 0.005134 0.005963 1.055556 0.007495 0.005547 0.006126 1.111111 0.007635 0.005967 0.006285 20012AE_WWHM 5/17/2022 04:35:06 Page 62 1.166667 0.007768 0.006395 0.006440 1.222222 0.007893 0.006830 0.006592 1.277778 0.008011 0.007272 0.006740 1.333333 0.008122 0.007720 0.006885 1.388889 0.008226 0.008174 0.007027 1.444444 0.008324 0.008634 0.007166 1.500000 0.008416 0.009099 0.007303 1.555556 0.008502 0.009569 0.007437 1.611111 0.008583 0.010043 0.007568 1.666667 0.008658 0.010522 0.007698 1.722222 0.008727 0.011005 0.007825 1.777778 0.008791 0.011492 0.007950 1.833333 0.008850 0.011982 0.008074 1.888889 0.008904 0.012475 0.008195 1.944444 0.008953 0.012971 0.008315 2.000000 0.008997 0.013470 0.008432 2.055556 0.009036 0.013971 0.008549 2.111111 0.009071 0.014474 0.008664 2.166667 0.009101 0.014978 0.008777 2.222222 0.009126 0.015485 0.008889 2.277778 0.009146 0.015992 0.008999 2.333333 0.009162 0.016501 0.009108 2.388889 0.009174 0.017010 0.009216 2.444444 0.009180 0.017520 0.009322 2.500000 0.009183 0.018030 0.009428 2.555556 0.009180 0.018540 0.009532 2.611111 0.009174 0.019050 0.009635 2.666667 0.009162 0.019560 0.009737 2.722222 0.009146 0.020068 0.009838 2.777778 0.009126 0.020576 0.009938 2.833333 0.009101 0.021082 0.010037 2.888889 0.009071 0.021587 0.010135 2.944444 0.009036 0.022090 0.010232 3.000000 0.008997 0.022591 0.010328 3.055556 0.008953 0.023089 0.010423 3.111111 0.008904 0.023586 0.010517 3.166667 0.008850 0.024079 0.010611 3.222222 0.008791 0.024569 0.010703 3.277778 0.008727 0.025055 0.010795 3.333333 0.008658 0.025538 0.010886 3.388889 0.008583 0.026017 0.010977 3.444444 0.008502 0.026492 0.011066 3.500000 0.008416 0.026962 0.011155 3.555556 0.008324 0.027427 0.011243 3.611111 0.008226 0.027887 0.011331 3.666667 0.008122 0.028341 0.011418 3.722222 0.008011 0.028789 0.011504 3.777778 0.007893 0.029231 0.011589 3.833333 0.007768 0.029666 0.011674 3.888889 0.007635 0.030094 0.011759 3.944444 0.007495 0.030514 0.011842 4.000000 0.007346 0.030926 0.011925 4.055556 0.007189 0.031330 0.012008 4.111111 0.007022 0.031725 0.012090 4.166667 0.006844 0.032110 0.012171 4.222222 0.006656 0.032485 0.012252 4.277778 0.006456 0.032849 0.012332 4.333333 0.006243 0.033202 0.012412 4.388889 0.006015 0.033543 0.012492 4.444444 0.005772 0.033870 0.012570 4.500000 0.005510 0.034184 0.012649 4.555556 0.005227 0.034482 0.012727 4.611111 0.004919 0.034764 0.012804 4.666667 0.004581 0.035028 0.012881 4.722222 0.004207 0.035272 0.012957 4.777778 0.003785 0.035495 0.013033 4.833333 0.003297 0.035692 0.013109 4.888889 0.002707 0.035859 0.013184 4.944444 0.001925 0.035989 0.079389 5.000000 0.001000 0.036061 0.232802 20012AE_WWHM 5/17/2022 04:35:06 Page 63 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 DIV PERLND 1 999 EXTNL PREC WDM 2 PREC ENGL 1 DIV IMPLND 1 999 EXTNL PREC WDM 1 EVAP ENGL 0.76 PERLND 1 999 EXTNL PETINP WDM 1 EVAP ENGL 0.76 IMPLND 1 999 EXTNL PETINP END EXT SOURCES EXT TARGETS <-Volume-> <-Grp> <-Member-><--Mult-->Tran <-Volume-> <Member> Tsys Tgap Amd *** <Name> # <Name> # #<-factor->strg <Name> # <Name> tem strg strg*** COPY 1 OUTPUT MEAN 1 1 48.4 WDM 701 FLOW ENGL REPL COPY 501 OUTPUT MEAN 1 1 48.4 WDM 801 FLOW ENGL REPL COPY 3 OUTPUT MEAN 1 1 48.4 WDM 703 FLOW ENGL REPL COPY 503 OUTPUT MEAN 1 1 48.4 WDM 803 FLOW ENGL REPL RCHRES 1 HYDR RO 1 1 1 WDM 1002 FLOW ENGL REPL RCHRES 1 HYDR STAGE 1 1 1 WDM 1003 STAG ENGL REPL COPY 2 OUTPUT MEAN 1 1 48.4 WDM 702 FLOW ENGL REPL COPY 502 OUTPUT MEAN 1 1 48.4 WDM 802 FLOW ENGL REPL END EXT TARGETS MASS -LINK <Volume> <-Grp> <-Member-><--Mult--> <Target> <-Grp> <-Member->*** <Name> <Name> # #<-factor-> <Name> <Name> # #*** MASS -LINK 2 PERLND PWATER SURD 0.083333 RCHRES INFLOW IVOL END MASS -LINK 2 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 SURD 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 20012AE_WWHM 5/17/2022 04:35:06 Page 64 Predeveloped HSPF Message File 20012AE_WWHM 5/17/2022 04:35:06 Page 65 Mitigated HSPF Message File 20012AE_WWHM 5/17/2022 04:35:06 Page 66 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. 2005-2022; 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 20012AE_WWHM 5/17/2022 04:35:06 Page 67