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Glendale Stormwater Management Plan Revised 10-15-18 Stormwater Management Plan Glendale Drive Homes Chanhassen, MN 10-15-2018 Prepared For: Lake West Development, LLC 14525 Highway 7, Suite 265 Minnetonka, MN 55345 Prepared By: Ryan Engineering 19655 Waterford Pl Excelsior, MN 55331 Stormwater Management Plan Glendale Drive Homes Chanhassen, MN 10-15-2018 CERTIFICATION I hereby certify that this plan, specification, or report was prepared by me or under my direct supervision and that I am a duly registered Engineer under the laws of the State of Minnesota. Perry M. Ryan, P.E. (Minnesota, 22071) Date: 10-15-2018 Stormwater Management Plan – Glendale Drive Homes Table of Contents i Ryan Engineering TABLE OF CONTENTS Page No. 1.0 INTRODUCTION AND CRITERIA .................................................................... 1-1 2.0 SITE SPECIFICS ............................................................................................... 2-1 3.0 STORMWATER DESIGN – QUANTITY & QUALITY ....................................... 3-1 3.1 Stormwater Quality .............................................................................................. 3-1 3.2 Stormwater Quantity – Rate Control ................................................................... 3-2 4.0 APPENDIX ........................................................................................................ 4-3 Appendix A – USDA Soils Report Appendix B – HydroCAD Report Stormwater Management Plan – Glendale Drive Homes introduction and criteria 3-1 Ryan Engineering 1.0 INTRODUCTION AND CRITERIA Glendale Drive Homes is a proposed single family development comprised of 5 lots on approximately 2.14 acres. Stormwater drainage on the site is generally to the south and southeast. The project disturbs approximately 1.78 acres and will be designed to meet the stormwater management requirements of the Minnehaha Creek Watershed District (MCWD) as well as the City of Chanhassen. MCWD and City Requirements: 1) Rate Control: Existing rates must be maintained for 1-year, 10- year, and 100 year rainfall events 2) Abstraction of 1” of runoff from site impervious area provided the soils are suitable for infiltration. 2.0 SITE SPECIFICS The existing property does not currently contain any structures and is treed per the Preliminary Plan Tree Inventory and Preservation Plan. The majority of the trees on site are in general poor condition as described further in the project narrative. The current pervious area existing is the entire parcel, subtracting the proposed right of ways is approximately 83,305 square feet. The soils are primarily Kilkenny-Lester and Lester-Kilkenny loams and Hyrologic Soil Group C. The proposed development is also within the Shoreland District for Lake Minnewashta which requires a maximum hard surface coverage of 25%. Based on this calculation, the maximum hard surface coverage for Lots 1-5 is 20,824 square feet. The development proposes Stormwater BMPs which will include an infiltration swale along the rear of each lot as shown on the Grading Plan. There is a proposed stormwater treatment pond at the southeast corner of Lot 5. This infiltration swale, along with the stormwater pond will provide the required water quality volume and the stormwater pond will also provide rate control as described below. 3.0 STORMWATER DESIGN – QUANTITY & QUALITY 3.1 Stormwater Quality The required treatment, water quality volume (WQV) of 1” from all site impervious areas will be met with infiltration basins on each lot. The following are the volume calculations for each lot: Lot 1 – 1” times Impervious Area = 1/12 * 3,900 SF = 325 CF required volume Lot 2 – 1” times Impervious Area = 1/12 * 3,500 SF = 292 CF required volume Stormwater Management Plan – Glendale Drive Homes Stormwater Design – Quantity & Quality 3-2 Ryan Engineering Lot 3 – 1” times Impervious Area = 1/12 * 3,500 SF = 292 CF required volume Lot 4 – 1” times Impervious Area = 1/12 * 2,750 SF = 230 CF required volume Lot 5 – 1” times Impervious Area = 1/12 * 3,900 SF = 325 CF required volume The infiltration swale and stormwater pond is designed to capture this flow with the required volumes shown. The infiltration volume is stored in the first 6” of the infiltration swale and stormwater pond, based on the limited permeability of the existing soils. 3.2 Stormwater Quantity – Rate Control The proposed stormwater pond is designed with a passive rock riprap outlet as shown on the plans. City staff has asked the design team to consider connecting the pond outlet to the 12” RP storm sewer along Minnewashta Parkway and this will be explored during preparation of final construction plans. The site has been modeled with HydroCAD software using the TR-20 method and area rainfalls for the 1-year, 10- year, and 100-year events. The pond is designed to mitigate runoff rates so that the proposed runoffs are maintained at or below existing levels. Below is a summary of the results of the attached HydroCAD model: Rainfall Event Existing Runoff Rate (cfs) Proposed Runoff Rate (cfs) 1 - Year 1.44 1.05 10 – Year 4.52 4.03 100 – Year 8.08 7.15 Stormwater Management Plan – Glendale Drive Homes APPENDIX 4-3 Ryan Engineering 4.0 APPENDIX United States Department of Agriculture A product of the National Cooperative Soil Survey, a joint effort of the United States Department of Agriculture and other Federal agencies, State agencies including the Agricultural Experiment Stations, and local participants Custom Soil Resource Report for Carver County, MinnesotaNatural Resources Conservation Service June 27, 2018 9 Custom Soil Resource Report Soil Map 4969970497001049700504970090497013049701704969930496997049700104970050497009049701304970170450940 450980 451020 451060 451100 451140 451180 451220 451260 451300 450940 450980 451020 451060 451100 451140 451180 451220 451260 451300 44° 52' 59'' N 93° 37' 16'' W44° 52' 59'' N93° 36' 59'' W44° 52' 51'' N 93° 37' 16'' W44° 52' 51'' N 93° 36' 59'' WN Map projection: Web Mercator Corner coordinates: WGS84 Edge tics: UTM Zone 15N WGS84 0 50 100 200 300 Feet 0 25 50 100 150 Meters Map Scale: 1:1,710 if printed on A landscape (11" x 8.5") sheet. Soil Map may not be valid at this scale. MAP LEGEND MAP INFORMATION Area of Interest (AOI) Area of Interest (AOI) Soils Soil Map Unit Polygons Soil Map Unit Lines Soil Map Unit Points Special Point Features Blowout Borrow Pit Clay Spot Closed Depression Gravel Pit Gravelly Spot Landfill Lava Flow Marsh or swamp Mine or Quarry Miscellaneous Water Perennial Water Rock Outcrop Saline Spot Sandy Spot Severely Eroded Spot Sinkhole Slide or Slip Sodic Spot Spoil Area Stony Spot Very Stony Spot Wet Spot Other Special Line Features Water Features Streams and Canals Transportation Rails Interstate Highways US Routes Major Roads Local Roads Background Aerial Photography The soil surveys that comprise your AOI were mapped at 1:12,000. Warning: Soil Map may not be valid at this scale. Enlargement of maps beyond the scale of mapping can cause misunderstanding of the detail of mapping and accuracy of soil line placement. The maps do not show the small areas of contrasting soils that could have been shown at a more detailed scale. Please rely on the bar scale on each map sheet for map measurements. Source of Map: Natural Resources Conservation Service Web Soil Survey URL: Coordinate System: Web Mercator (EPSG:3857) Maps from the Web Soil Survey are based on the Web Mercator projection, which preserves direction and shape but distorts distance and area. A projection that preserves area, such as the Albers equal-area conic projection, should be used if more accurate calculations of distance or area are required. This product is generated from the USDA-NRCS certified data as of the version date(s) listed below. Soil Survey Area: Carver County, Minnesota Survey Area Data: Version 14, Oct 4, 2017 Soil map units are labeled (as space allows) for map scales 1:50,000 or larger. Date(s) aerial images were photographed: Sep 12, 2010—Aug 2, 2016 The orthophoto or other base map on which the soil lines were compiled and digitized probably differs from the background imagery displayed on these maps. As a result, some minor shifting of map unit boundaries may be evident. Custom Soil Resource Report 10 Map Unit Legend Map Unit Symbol Map Unit Name Acres in AOI Percent of AOI EX Essexville sandy loam 0.7 6.3% KB Kilkenny-Lester loams, 2 to 6 percent slopes 7.0 64.4% KC Lester-Kilkenny loams, 6 to 12 percent slopes 2.7 25.0% KC2 Lester-Kilkenny complex, 6 to 10 percent slopes, moderately eroded 0.0 0.0% W Water 0.5 4.3% Totals for Area of Interest 10.9 100.0% Map Unit Descriptions The map units delineated on the detailed soil maps in a soil survey represent the soils or miscellaneous areas in the survey area. The map unit descriptions, along with the maps, can be used to determine the composition and properties of a unit. A map unit delineation on a soil map represents an area dominated by one or more major kinds of soil or miscellaneous areas. A map unit is identified and named according to the taxonomic classification of the dominant soils. Within a taxonomic class there are precisely defined limits for the properties of the soils. On the landscape, however, the soils are natural phenomena, and they have the characteristic variability of all natural phenomena. Thus, the range of some observed properties may extend beyond the limits defined for a taxonomic class. Areas of soils of a single taxonomic class rarely, if ever, can be mapped without including areas of other taxonomic classes. Consequently, every map unit is made up of the soils or miscellaneous areas for which it is named and some minor components that belong to taxonomic classes other than those of the major soils. Most minor soils have properties similar to those of the dominant soil or soils in the map unit, and thus they do not affect use and management. These are called noncontrasting, or similar, components. They may or may not be mentioned in a particular map unit description. Other minor components, however, have properties and behavioral characteristics divergent enough to affect use or to require different management. These are called contrasting, or dissimilar, components. They generally are in small areas and could not be mapped separately because of the scale used. Some small areas of strongly contrasting soils or miscellaneous areas are identified by a special symbol on the maps. If included in the database for a given area, the contrasting minor components are identified in the map unit descriptions along with some characteristics of each. A few areas of minor components may not have been observed, and consequently they are not mentioned in the descriptions, especially where the pattern was so complex that it was impractical to make enough observations to identify all the soils and miscellaneous areas on the landscape. Custom Soil Resource Report 11 The presence of minor components in a map unit in no way diminishes the usefulness or accuracy of the data. The objective of mapping is not to delineate pure taxonomic classes but rather to separate the landscape into landforms or landform segments that have similar use and management requirements. The delineation of such segments on the map provides sufficient information for the development of resource plans. If intensive use of small areas is planned, however, onsite investigation is needed to define and locate the soils and miscellaneous areas. An identifying symbol precedes the map unit name in the map unit descriptions. Each description includes general facts about the unit and gives important soil properties and qualities. Soils that have profiles that are almost alike make up a soil series. Except for differences in texture of the surface layer, all the soils of a series have major horizons that are similar in composition, thickness, and arrangement. Soils of one series can differ in texture of the surface layer, slope, stoniness, salinity, degree of erosion, and other characteristics that affect their use. On the basis of such differences, a soil series is divided into soil phases. Most of the areas shown on the detailed soil maps are phases of soil series. The name of a soil phase commonly indicates a feature that affects use or management. For example, Alpha silt loam, 0 to 2 percent slopes, is a phase of the Alpha series. Some map units are made up of two or more major soils or miscellaneous areas. These map units are complexes, associations, or undifferentiated groups. A complex consists of two or more soils or miscellaneous areas in such an intricate pattern or in such small areas that they cannot be shown separately on the maps. The pattern and proportion of the soils or miscellaneous areas are somewhat similar in all areas. Alpha-Beta complex, 0 to 6 percent slopes, is an example. An association is made up of two or more geographically associated soils or miscellaneous areas that are shown as one unit on the maps. Because of present or anticipated uses of the map units in the survey area, it was not considered practical or necessary to map the soils or miscellaneous areas separately. The pattern and relative proportion of the soils or miscellaneous areas are somewhat similar. Alpha-Beta association, 0 to 2 percent slopes, is an example. An undifferentiated group is made up of two or more soils or miscellaneous areas that could be mapped individually but are mapped as one unit because similar interpretations can be made for use and management. The pattern and proportion of the soils or miscellaneous areas in a mapped area are not uniform. An area can be made up of only one of the major soils or miscellaneous areas, or it can be made up of all of them. Alpha and Beta soils, 0 to 2 percent slopes, is an example. Some surveys include miscellaneous areas. Such areas have little or no soil material and support little or no vegetation. Rock outcrop is an example. Custom Soil Resource Report 12 1S Existing Runoff 2S Lots 1-5 4S Front Yards 5R Proposed Runoff3P Lot 5 Pond Routing Diagram for Glendale Drive Homes-R1 Prepared by HydroCAD SAMPLER 1-800-927-7246 www.hydrocad.net, Printed 10/11/2018 HydroCAD® 10.00-22 Sampler s/n S27829 © 2018 HydroCAD Software Solutions LLC Subcat Reach Pond Link Glendale Drive Homes-R1 Printed 10/11/2018Prepared by HydroCAD SAMPLER 1-800-927-7246 www.hydrocad.net Page 2HydroCAD® 10.00-22 Sampler s/n S27829 © 2018 HydroCAD Software Solutions LLC This report was prepared with the free HydroCAD SAMPLER, which is licensed for evaluation and educational use ONLY. For actual design or modeling applications you MUST use a full version of HydroCAD which may be purchased at www.hydrocad.net. Full programs also include complete technical support,training materials, and additional features which are essential for actual design work. Area Listing (all nodes) Area (acres) CN Description (subcatchment-numbers) 1.530 74 >75% Grass cover, Good, HSG C (2S, 4S) 0.382 98 Roofs, HSG C (2S) 1.912 76 Woods/grass comb., Fair, HSG C (1S) 3.825 77 TOTAL AREA Glendale Drive Homes-R1 Printed 10/11/2018Prepared by HydroCAD SAMPLER 1-800-927-7246 www.hydrocad.net Page 3HydroCAD® 10.00-22 Sampler s/n S27829 © 2018 HydroCAD Software Solutions LLC This report was prepared with the free HydroCAD SAMPLER, which is licensed for evaluation and educational use ONLY. For actual design or modeling applications you MUST use a full version of HydroCAD which may be purchased at www.hydrocad.net. Full programs also include complete technical support,training materials, and additional features which are essential for actual design work. Soil Listing (all nodes) Area (acres) Soil Group Subcatchment Numbers 0.000 HSG A 0.000 HSG B 3.825 HSG C 1S, 2S, 4S 0.000 HSG D 0.000 Other 3.825 TOTAL AREA Glendale Drive Homes-R1 Printed 10/11/2018Prepared by HydroCAD SAMPLER 1-800-927-7246 www.hydrocad.net Page 4HydroCAD® 10.00-22 Sampler s/n S27829 © 2018 HydroCAD Software Solutions LLC This report was prepared with the free HydroCAD SAMPLER, which is licensed for evaluation and educational use ONLY. For actual design or modeling applications you MUST use a full version of HydroCAD which may be purchased at www.hydrocad.net. Full programs also include complete technical support,training materials, and additional features which are essential for actual design work. Ground Covers (all nodes) HSG-A (acres) HSG-B (acres) HSG-C (acres) HSG-D (acres) Other (acres) Total (acres) Ground Cover Subcatchment Numbers 0.000 0.000 1.530 0.000 0.000 1.530 >75% Grass cover, Good 2S, 4S 0.000 0.000 0.382 0.000 0.000 0.382 Roofs 2S 0.000 0.000 1.912 0.000 0.000 1.912 Woods/grass comb., Fair 1S 0.000 0.000 3.825 0.000 0.000 3.825 TOTAL AREA Type II 24-hr 1-Year Rainfall=2.40"Glendale Drive Homes-R1 Printed 10/11/2018Prepared by HydroCAD SAMPLER 1-800-927-7246 www.hydrocad.net Page 5HydroCAD® 10.00-22 Sampler s/n S27829 © 2018 HydroCAD Software Solutions LLC This report was prepared with the free HydroCAD SAMPLER, which is licensed for evaluation and educational use ONLY. For actual design or modeling applications you MUST use a full version of HydroCAD which may be purchased at www.hydrocad.net. Full programs also include complete technical support,training materials, and additional features which are essential for actual design work. Time span=5.00-24.00 hrs, dt=0.05 hrs, 381 points Runoff by SCS TR-20 method, UH=SCS, Weighted-CN Reach routing by Stor-Ind+Trans method - Pond routing by Stor-Ind method Runoff Area=83,305 sf 0.00% Impervious Runoff Depth>0.63"Subcatchment 1S: Existing Runoff Tc=15.0 min CN=76 Runoff=1.44 cfs 0.101 af Runoff Area=57,500 sf 28.96% Impervious Runoff Depth>0.87"Subcatchment 2S: Lots 1-5 Tc=20.0 min CN=81 Runoff=1.23 cfs 0.095 af Runoff Area=25,805 sf 0.00% Impervious Runoff Depth>0.55"Subcatchment 4S: Front Yards Tc=15.0 min CN=74 Runoff=0.37 cfs 0.027 af Inflow=1.05 cfs 0.109 afReach 5R: Proposed Runoff Outflow=1.05 cfs 0.109 af Peak Elev=972.38' Storage=1,349 cf Inflow=1.23 cfs 0.095 afPond 3P: Lot 5 Pond Outflow=0.86 cfs 0.082 af Total Runoff Area = 3.825 ac Runoff Volume = 0.223 af Average Runoff Depth = 0.70" 90.01% Pervious = 3.443 ac 9.99% Impervious = 0.382 ac Type II 24-hr 1-Year Rainfall=2.40"Glendale Drive Homes-R1 Printed 10/11/2018Prepared by HydroCAD SAMPLER 1-800-927-7246 www.hydrocad.net Page 6HydroCAD® 10.00-22 Sampler s/n S27829 © 2018 HydroCAD Software Solutions LLC This report was prepared with the free HydroCAD SAMPLER, which is licensed for evaluation and educational use ONLY. For actual design or modeling applications you MUST use a full version of HydroCAD which may be purchased at www.hydrocad.net. Full programs also include complete technical support,training materials, and additional features which are essential for actual design work. Summary for Subcatchment 1S: Existing Runoff Runoff = 1.44 cfs @ 12.09 hrs, Volume= 0.101 af, Depth> 0.63" Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 5.00-24.00 hrs, dt= 0.05 hrs Type II 24-hr 1-Year Rainfall=2.40" Area (sf) CN Description 83,305 76 Woods/grass comb., Fair, HSG C 83,305 100.00% Pervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 15.0 Direct Entry, Subcatchment 1S: Existing Runoff Runoff Hydrograph Time (hours) 24232221201918171615141312111098765Flow (cfs)1 0 Type II 24-hr 1-Year Rainfall=2.40" Runoff Area=83,305 sf Runoff Volume=0.101 af Runoff Depth>0.63" Tc=15.0 min CN=76 1.44 cfs Type II 24-hr 1-Year Rainfall=2.40"Glendale Drive Homes-R1 Printed 10/11/2018Prepared by HydroCAD SAMPLER 1-800-927-7246 www.hydrocad.net Page 7HydroCAD® 10.00-22 Sampler s/n S27829 © 2018 HydroCAD Software Solutions LLC This report was prepared with the free HydroCAD SAMPLER, which is licensed for evaluation and educational use ONLY. For actual design or modeling applications you MUST use a full version of HydroCAD which may be purchased at www.hydrocad.net. Full programs also include complete technical support,training materials, and additional features which are essential for actual design work. Summary for Subcatchment 2S: Lots 1-5 Runoff = 1.23 cfs @ 12.14 hrs, Volume= 0.095 af, Depth> 0.87" Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 5.00-24.00 hrs, dt= 0.05 hrs Type II 24-hr 1-Year Rainfall=2.40" Area (sf) CN Description 16,650 98 Roofs, HSG C 40,850 74 >75% Grass cover, Good, HSG C 57,500 81 Weighted Average 40,850 71.04% Pervious Area 16,650 28.96% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 20.0 Direct Entry, Subcatchment 2S: Lots 1-5 Runoff Hydrograph Time (hours) 24232221201918171615141312111098765Flow (cfs)1 0 Type II 24-hr 1-Year Rainfall=2.40" Runoff Area=57,500 sf Runoff Volume=0.095 af Runoff Depth>0.87" Tc=20.0 min CN=81 1.23 cfs Type II 24-hr 1-Year Rainfall=2.40"Glendale Drive Homes-R1 Printed 10/11/2018Prepared by HydroCAD SAMPLER 1-800-927-7246 www.hydrocad.net Page 8HydroCAD® 10.00-22 Sampler s/n S27829 © 2018 HydroCAD Software Solutions LLC This report was prepared with the free HydroCAD SAMPLER, which is licensed for evaluation and educational use ONLY. For actual design or modeling applications you MUST use a full version of HydroCAD which may be purchased at www.hydrocad.net. Full programs also include complete technical support,training materials, and additional features which are essential for actual design work. Summary for Subcatchment 4S: Front Yards Runoff = 0.37 cfs @ 12.09 hrs, Volume= 0.027 af, Depth> 0.55" Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 5.00-24.00 hrs, dt= 0.05 hrs Type II 24-hr 1-Year Rainfall=2.40" Area (sf) CN Description 4,200 74 >75% Grass cover, Good, HSG C 21,605 74 >75% Grass cover, Good, HSG C 25,805 74 Weighted Average 25,805 100.00% Pervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 15.0 Direct Entry, Subcatchment 4S: Front Yards Runoff Hydrograph Time (hours) 24232221201918171615141312111098765Flow (cfs)0.4 0.38 0.36 0.34 0.32 0.3 0.28 0.26 0.24 0.22 0.2 0.18 0.16 0.14 0.12 0.1 0.08 0.06 0.04 0.02 0 Type II 24-hr 1-Year Rainfall=2.40" Runoff Area=25,805 sf Runoff Volume=0.027 af Runoff Depth>0.55" Tc=15.0 min CN=74 0.37 cfs Type II 24-hr 1-Year Rainfall=2.40"Glendale Drive Homes-R1 Printed 10/11/2018Prepared by HydroCAD SAMPLER 1-800-927-7246 www.hydrocad.net Page 9HydroCAD® 10.00-22 Sampler s/n S27829 © 2018 HydroCAD Software Solutions LLC This report was prepared with the free HydroCAD SAMPLER, which is licensed for evaluation and educational use ONLY. For actual design or modeling applications you MUST use a full version of HydroCAD which may be purchased at www.hydrocad.net. Full programs also include complete technical support,training materials, and additional features which are essential for actual design work. Summary for Reach 5R: Proposed Runoff [40] Hint: Not Described (Outflow=Inflow) Inflow Area = 1.912 ac, 19.99% Impervious, Inflow Depth > 0.69" for 1-Year event Inflow = 1.05 cfs @ 12.26 hrs, Volume= 0.109 af Outflow = 1.05 cfs @ 12.26 hrs, Volume= 0.109 af, Atten= 0%, Lag= 0.0 min Routing by Stor-Ind+Trans method, Time Span= 5.00-24.00 hrs, dt= 0.05 hrs Reach 5R: Proposed Runoff Inflow Outflow Hydrograph Time (hours) 24232221201918171615141312111098765Flow (cfs)1 0 Inflow Area=1.912 ac 1.05 cfs 1.05 cfs Type II 24-hr 1-Year Rainfall=2.40"Glendale Drive Homes-R1 Printed 10/11/2018Prepared by HydroCAD SAMPLER 1-800-927-7246 www.hydrocad.net Page 10HydroCAD® 10.00-22 Sampler s/n S27829 © 2018 HydroCAD Software Solutions LLC This report was prepared with the free HydroCAD SAMPLER, which is licensed for evaluation and educational use ONLY. For actual design or modeling applications you MUST use a full version of HydroCAD which may be purchased at www.hydrocad.net. Full programs also include complete technical support,training materials, and additional features which are essential for actual design work. Summary for Pond 3P: Lot 5 Pond Inflow Area = 1.320 ac, 28.96% Impervious, Inflow Depth > 0.87" for 1-Year event Inflow = 1.23 cfs @ 12.14 hrs, Volume= 0.095 af Outflow = 0.86 cfs @ 12.28 hrs, Volume= 0.082 af, Atten= 30%, Lag= 8.3 min Primary = 0.86 cfs @ 12.28 hrs, Volume= 0.082 af Routing by Stor-Ind method, Time Span= 5.00-24.00 hrs, dt= 0.05 hrs / 4 Starting Elev= 971.50' Surf.Area= 816 sf Storage= 326 cf Peak Elev= 972.38' @ 12.28 hrs Surf.Area= 1,502 sf Storage= 1,349 cf (1,023 cf above start) Plug-Flow detention time= 139.1 min calculated for 0.075 af (79% of inflow) Center-of-Mass det. time= 33.5 min ( 894.5 - 861.1 ) Volume Invert Avail.Storage Storage Description #1 971.00' 2,434 cf Custom Stage Data (Pyramidal) Listed below (Recalc) Elevation Surf.Area Inc.Store Cum.Store Wet.Area (feet) (sq-ft) (cubic-feet) (cubic-feet) (sq-ft) 971.00 500 0 0 500 972.00 1,210 829 829 1,219 973.00 2,035 1,605 2,434 2,059 Device Routing Invert Outlet Devices #1 Primary 972.00'Custom Weir/Orifice, Cv= 3.28 (C= 4.10) Head (feet) 0.00 1.00 Width (feet) 0.50 3.00 Primary OutFlow Max=0.85 cfs @ 12.28 hrs HW=972.38' (Free Discharge) 1=Custom Weir/Orifice (Weir Controls 0.85 cfs @ 2.29 fps) Type II 24-hr 1-Year Rainfall=2.40"Glendale Drive Homes-R1 Printed 10/11/2018Prepared by HydroCAD SAMPLER 1-800-927-7246 www.hydrocad.net Page 11HydroCAD® 10.00-22 Sampler s/n S27829 © 2018 HydroCAD Software Solutions LLC This report was prepared with the free HydroCAD SAMPLER, which is licensed for evaluation and educational use ONLY. For actual design or modeling applications you MUST use a full version of HydroCAD which may be purchased at www.hydrocad.net. Full programs also include complete technical support,training materials, and additional features which are essential for actual design work. Pond 3P: Lot 5 Pond Inflow Primary Hydrograph Time (hours) 24232221201918171615141312111098765Flow (cfs)1 0 Inflow Area=1.320 ac Peak Elev=972.38' Storage=1,349 cf 1.23 cfs 0.86 cfs Type II 24-hr 10-Year Rainfall=4.15"Glendale Drive Homes-R1 Printed 10/11/2018Prepared by HydroCAD SAMPLER 1-800-927-7246 www.hydrocad.net Page 12HydroCAD® 10.00-22 Sampler s/n S27829 © 2018 HydroCAD Software Solutions LLC This report was prepared with the free HydroCAD SAMPLER, which is licensed for evaluation and educational use ONLY. For actual design or modeling applications you MUST use a full version of HydroCAD which may be purchased at www.hydrocad.net. Full programs also include complete technical support,training materials, and additional features which are essential for actual design work. Time span=5.00-24.00 hrs, dt=0.05 hrs, 381 points Runoff by SCS TR-20 method, UH=SCS, Weighted-CN Reach routing by Stor-Ind+Trans method - Pond routing by Stor-Ind method Runoff Area=83,305 sf 0.00% Impervious Runoff Depth>1.85"Subcatchment 1S: Existing Runoff Tc=15.0 min CN=76 Runoff=4.52 cfs 0.294 af Runoff Area=57,500 sf 28.96% Impervious Runoff Depth>2.24"Subcatchment 2S: Lots 1-5 Tc=20.0 min CN=81 Runoff=3.28 cfs 0.246 af Runoff Area=25,805 sf 0.00% Impervious Runoff Depth>1.70"Subcatchment 4S: Front Yards Tc=15.0 min CN=74 Runoff=1.28 cfs 0.084 af Inflow=4.03 cfs 0.316 afReach 5R: Proposed Runoff Outflow=4.03 cfs 0.316 af Peak Elev=972.72' Storage=1,895 cf Inflow=3.28 cfs 0.246 afPond 3P: Lot 5 Pond Outflow=3.03 cfs 0.232 af Total Runoff Area = 3.825 ac Runoff Volume = 0.624 af Average Runoff Depth = 1.96" 90.01% Pervious = 3.443 ac 9.99% Impervious = 0.382 ac Type II 24-hr 10-Year Rainfall=4.15"Glendale Drive Homes-R1 Printed 10/11/2018Prepared by HydroCAD SAMPLER 1-800-927-7246 www.hydrocad.net Page 13HydroCAD® 10.00-22 Sampler s/n S27829 © 2018 HydroCAD Software Solutions LLC This report was prepared with the free HydroCAD SAMPLER, which is licensed for evaluation and educational use ONLY. For actual design or modeling applications you MUST use a full version of HydroCAD which may be purchased at www.hydrocad.net. Full programs also include complete technical support,training materials, and additional features which are essential for actual design work. Summary for Subcatchment 1S: Existing Runoff Runoff = 4.52 cfs @ 12.08 hrs, Volume= 0.294 af, Depth> 1.85" Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 5.00-24.00 hrs, dt= 0.05 hrs Type II 24-hr 10-Year Rainfall=4.15" Area (sf) CN Description 83,305 76 Woods/grass comb., Fair, HSG C 83,305 100.00% Pervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 15.0 Direct Entry, Subcatchment 1S: Existing Runoff Runoff Hydrograph Time (hours) 24232221201918171615141312111098765Flow (cfs)5 4 3 2 1 0 Type II 24-hr 10-Year Rainfall=4.15" Runoff Area=83,305 sf Runoff Volume=0.294 af Runoff Depth>1.85" Tc=15.0 min CN=76 4.52 cfs Type II 24-hr 10-Year Rainfall=4.15"Glendale Drive Homes-R1 Printed 10/11/2018Prepared by HydroCAD SAMPLER 1-800-927-7246 www.hydrocad.net Page 14HydroCAD® 10.00-22 Sampler s/n S27829 © 2018 HydroCAD Software Solutions LLC This report was prepared with the free HydroCAD SAMPLER, which is licensed for evaluation and educational use ONLY. For actual design or modeling applications you MUST use a full version of HydroCAD which may be purchased at www.hydrocad.net. Full programs also include complete technical support,training materials, and additional features which are essential for actual design work. Summary for Subcatchment 2S: Lots 1-5 Runoff = 3.28 cfs @ 12.13 hrs, Volume= 0.246 af, Depth> 2.24" Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 5.00-24.00 hrs, dt= 0.05 hrs Type II 24-hr 10-Year Rainfall=4.15" Area (sf) CN Description 16,650 98 Roofs, HSG C 40,850 74 >75% Grass cover, Good, HSG C 57,500 81 Weighted Average 40,850 71.04% Pervious Area 16,650 28.96% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 20.0 Direct Entry, Subcatchment 2S: Lots 1-5 Runoff Hydrograph Time (hours) 24232221201918171615141312111098765Flow (cfs)3 2 1 0 Type II 24-hr 10-Year Rainfall=4.15" Runoff Area=57,500 sf Runoff Volume=0.246 af Runoff Depth>2.24" Tc=20.0 min CN=81 3.28 cfs Type II 24-hr 10-Year Rainfall=4.15"Glendale Drive Homes-R1 Printed 10/11/2018Prepared by HydroCAD SAMPLER 1-800-927-7246 www.hydrocad.net Page 15HydroCAD® 10.00-22 Sampler s/n S27829 © 2018 HydroCAD Software Solutions LLC This report was prepared with the free HydroCAD SAMPLER, which is licensed for evaluation and educational use ONLY. For actual design or modeling applications you MUST use a full version of HydroCAD which may be purchased at www.hydrocad.net. Full programs also include complete technical support,training materials, and additional features which are essential for actual design work. Summary for Subcatchment 4S: Front Yards Runoff = 1.28 cfs @ 12.08 hrs, Volume= 0.084 af, Depth> 1.70" Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 5.00-24.00 hrs, dt= 0.05 hrs Type II 24-hr 10-Year Rainfall=4.15" Area (sf) CN Description 4,200 74 >75% Grass cover, Good, HSG C 21,605 74 >75% Grass cover, Good, HSG C 25,805 74 Weighted Average 25,805 100.00% Pervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 15.0 Direct Entry, Subcatchment 4S: Front Yards Runoff Hydrograph Time (hours) 24232221201918171615141312111098765Flow (cfs)1 0 Type II 24-hr 10-Year Rainfall=4.15" Runoff Area=25,805 sf Runoff Volume=0.084 af Runoff Depth>1.70" Tc=15.0 min CN=74 1.28 cfs Type II 24-hr 10-Year Rainfall=4.15"Glendale Drive Homes-R1 Printed 10/11/2018Prepared by HydroCAD SAMPLER 1-800-927-7246 www.hydrocad.net Page 16HydroCAD® 10.00-22 Sampler s/n S27829 © 2018 HydroCAD Software Solutions LLC This report was prepared with the free HydroCAD SAMPLER, which is licensed for evaluation and educational use ONLY. For actual design or modeling applications you MUST use a full version of HydroCAD which may be purchased at www.hydrocad.net. Full programs also include complete technical support,training materials, and additional features which are essential for actual design work. Summary for Reach 5R: Proposed Runoff [40] Hint: Not Described (Outflow=Inflow) Inflow Area = 1.912 ac, 19.99% Impervious, Inflow Depth > 1.98" for 10-Year event Inflow = 4.03 cfs @ 12.15 hrs, Volume= 0.316 af Outflow = 4.03 cfs @ 12.15 hrs, Volume= 0.316 af, Atten= 0%, Lag= 0.0 min Routing by Stor-Ind+Trans method, Time Span= 5.00-24.00 hrs, dt= 0.05 hrs Reach 5R: Proposed Runoff Inflow Outflow Hydrograph Time (hours) 24232221201918171615141312111098765Flow (cfs)4 3 2 1 0 Inflow Area=1.912 ac 4.03 cfs 4.03 cfs Type II 24-hr 10-Year Rainfall=4.15"Glendale Drive Homes-R1 Printed 10/11/2018Prepared by HydroCAD SAMPLER 1-800-927-7246 www.hydrocad.net Page 17HydroCAD® 10.00-22 Sampler s/n S27829 © 2018 HydroCAD Software Solutions LLC This report was prepared with the free HydroCAD SAMPLER, which is licensed for evaluation and educational use ONLY. For actual design or modeling applications you MUST use a full version of HydroCAD which may be purchased at www.hydrocad.net. Full programs also include complete technical support,training materials, and additional features which are essential for actual design work. Summary for Pond 3P: Lot 5 Pond Inflow Area = 1.320 ac, 28.96% Impervious, Inflow Depth > 2.24" for 10-Year event Inflow = 3.28 cfs @ 12.13 hrs, Volume= 0.246 af Outflow = 3.03 cfs @ 12.19 hrs, Volume= 0.232 af, Atten= 8%, Lag= 3.5 min Primary = 3.03 cfs @ 12.19 hrs, Volume= 0.232 af Routing by Stor-Ind method, Time Span= 5.00-24.00 hrs, dt= 0.05 hrs / 4 Starting Elev= 971.50' Surf.Area= 816 sf Storage= 326 cf Peak Elev= 972.72' @ 12.19 hrs Surf.Area= 1,780 sf Storage= 1,895 cf (1,569 cf above start) Plug-Flow detention time= 67.6 min calculated for 0.225 af (91% of inflow) Center-of-Mass det. time= 18.2 min ( 852.2 - 834.0 ) Volume Invert Avail.Storage Storage Description #1 971.00' 2,434 cf Custom Stage Data (Pyramidal) Listed below (Recalc) Elevation Surf.Area Inc.Store Cum.Store Wet.Area (feet) (sq-ft) (cubic-feet) (cubic-feet) (sq-ft) 971.00 500 0 0 500 972.00 1,210 829 829 1,219 973.00 2,035 1,605 2,434 2,059 Device Routing Invert Outlet Devices #1 Primary 972.00'Custom Weir/Orifice, Cv= 3.28 (C= 4.10) Head (feet) 0.00 1.00 Width (feet) 0.50 3.00 Primary OutFlow Max=3.00 cfs @ 12.19 hrs HW=972.71' (Free Discharge) 1=Custom Weir/Orifice (Weir Controls 3.00 cfs @ 3.02 fps) Type II 24-hr 10-Year Rainfall=4.15"Glendale Drive Homes-R1 Printed 10/11/2018Prepared by HydroCAD SAMPLER 1-800-927-7246 www.hydrocad.net Page 18HydroCAD® 10.00-22 Sampler s/n S27829 © 2018 HydroCAD Software Solutions LLC This report was prepared with the free HydroCAD SAMPLER, which is licensed for evaluation and educational use ONLY. For actual design or modeling applications you MUST use a full version of HydroCAD which may be purchased at www.hydrocad.net. Full programs also include complete technical support,training materials, and additional features which are essential for actual design work. Pond 3P: Lot 5 Pond Inflow Primary Hydrograph Time (hours) 24232221201918171615141312111098765Flow (cfs)3 2 1 0 Inflow Area=1.320 ac Peak Elev=972.72' Storage=1,895 cf 3.28 cfs 3.03 cfs Type II 24-hr 100-Year Rainfall=5.90"Glendale Drive Homes-R1 Printed 10/11/2018Prepared by HydroCAD SAMPLER 1-800-927-7246 www.hydrocad.net Page 19HydroCAD® 10.00-22 Sampler s/n S27829 © 2018 HydroCAD Software Solutions LLC This report was prepared with the free HydroCAD SAMPLER, which is licensed for evaluation and educational use ONLY. For actual design or modeling applications you MUST use a full version of HydroCAD which may be purchased at www.hydrocad.net. Full programs also include complete technical support,training materials, and additional features which are essential for actual design work. Time span=5.00-24.00 hrs, dt=0.05 hrs, 381 points Runoff by SCS TR-20 method, UH=SCS, Weighted-CN Reach routing by Stor-Ind+Trans method - Pond routing by Stor-Ind method Runoff Area=83,305 sf 0.00% Impervious Runoff Depth>3.28"Subcatchment 1S: Existing Runoff Tc=15.0 min CN=76 Runoff=8.08 cfs 0.523 af Runoff Area=57,500 sf 28.96% Impervious Runoff Depth>3.78"Subcatchment 2S: Lots 1-5 Tc=20.0 min CN=81 Runoff=5.52 cfs 0.415 af Runoff Area=25,805 sf 0.00% Impervious Runoff Depth>3.09"Subcatchment 4S: Front Yards Tc=15.0 min CN=74 Runoff=2.36 cfs 0.153 af Inflow=7.15 cfs 0.553 afReach 5R: Proposed Runoff Outflow=7.15 cfs 0.553 af Peak Elev=972.93' Storage=2,290 cf Inflow=5.52 cfs 0.415 afPond 3P: Lot 5 Pond Outflow=5.23 cfs 0.401 af Total Runoff Area = 3.825 ac Runoff Volume = 1.091 af Average Runoff Depth = 3.42" 90.01% Pervious = 3.443 ac 9.99% Impervious = 0.382 ac Type II 24-hr 100-Year Rainfall=5.90"Glendale Drive Homes-R1 Printed 10/11/2018Prepared by HydroCAD SAMPLER 1-800-927-7246 www.hydrocad.net Page 20HydroCAD® 10.00-22 Sampler s/n S27829 © 2018 HydroCAD Software Solutions LLC This report was prepared with the free HydroCAD SAMPLER, which is licensed for evaluation and educational use ONLY. For actual design or modeling applications you MUST use a full version of HydroCAD which may be purchased at www.hydrocad.net. Full programs also include complete technical support,training materials, and additional features which are essential for actual design work. Summary for Subcatchment 1S: Existing Runoff Runoff = 8.08 cfs @ 12.07 hrs, Volume= 0.523 af, Depth> 3.28" Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 5.00-24.00 hrs, dt= 0.05 hrs Type II 24-hr 100-Year Rainfall=5.90" Area (sf) CN Description 83,305 76 Woods/grass comb., Fair, HSG C 83,305 100.00% Pervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 15.0 Direct Entry, Subcatchment 1S: Existing Runoff Runoff Hydrograph Time (hours) 24232221201918171615141312111098765Flow (cfs)9 8 7 6 5 4 3 2 1 0 Type II 24-hr 100-Year Rainfall=5.90" Runoff Area=83,305 sf Runoff Volume=0.523 af Runoff Depth>3.28" Tc=15.0 min CN=76 8.08 cfs Type II 24-hr 100-Year Rainfall=5.90"Glendale Drive Homes-R1 Printed 10/11/2018Prepared by HydroCAD SAMPLER 1-800-927-7246 www.hydrocad.net Page 21HydroCAD® 10.00-22 Sampler s/n S27829 © 2018 HydroCAD Software Solutions LLC This report was prepared with the free HydroCAD SAMPLER, which is licensed for evaluation and educational use ONLY. For actual design or modeling applications you MUST use a full version of HydroCAD which may be purchased at www.hydrocad.net. Full programs also include complete technical support,training materials, and additional features which are essential for actual design work. Summary for Subcatchment 2S: Lots 1-5 Runoff = 5.52 cfs @ 12.12 hrs, Volume= 0.415 af, Depth> 3.78" Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 5.00-24.00 hrs, dt= 0.05 hrs Type II 24-hr 100-Year Rainfall=5.90" Area (sf) CN Description 16,650 98 Roofs, HSG C 40,850 74 >75% Grass cover, Good, HSG C 57,500 81 Weighted Average 40,850 71.04% Pervious Area 16,650 28.96% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 20.0 Direct Entry, Subcatchment 2S: Lots 1-5 Runoff Hydrograph Time (hours) 24232221201918171615141312111098765Flow (cfs)6 5 4 3 2 1 0 Type II 24-hr 100-Year Rainfall=5.90" Runoff Area=57,500 sf Runoff Volume=0.415 af Runoff Depth>3.78" Tc=20.0 min CN=81 5.52 cfs Type II 24-hr 100-Year Rainfall=5.90"Glendale Drive Homes-R1 Printed 10/11/2018Prepared by HydroCAD SAMPLER 1-800-927-7246 www.hydrocad.net Page 22HydroCAD® 10.00-22 Sampler s/n S27829 © 2018 HydroCAD Software Solutions LLC This report was prepared with the free HydroCAD SAMPLER, which is licensed for evaluation and educational use ONLY. For actual design or modeling applications you MUST use a full version of HydroCAD which may be purchased at www.hydrocad.net. Full programs also include complete technical support,training materials, and additional features which are essential for actual design work. Summary for Subcatchment 4S: Front Yards Runoff = 2.36 cfs @ 12.07 hrs, Volume= 0.153 af, Depth> 3.09" Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 5.00-24.00 hrs, dt= 0.05 hrs Type II 24-hr 100-Year Rainfall=5.90" Area (sf) CN Description 4,200 74 >75% Grass cover, Good, HSG C 21,605 74 >75% Grass cover, Good, HSG C 25,805 74 Weighted Average 25,805 100.00% Pervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 15.0 Direct Entry, Subcatchment 4S: Front Yards Runoff Hydrograph Time (hours) 24232221201918171615141312111098765Flow (cfs)2 1 0 Type II 24-hr 100-Year Rainfall=5.90" Runoff Area=25,805 sf Runoff Volume=0.153 af Runoff Depth>3.09" Tc=15.0 min CN=74 2.36 cfs Type II 24-hr 100-Year Rainfall=5.90"Glendale Drive Homes-R1 Printed 10/11/2018Prepared by HydroCAD SAMPLER 1-800-927-7246 www.hydrocad.net Page 23HydroCAD® 10.00-22 Sampler s/n S27829 © 2018 HydroCAD Software Solutions LLC This report was prepared with the free HydroCAD SAMPLER, which is licensed for evaluation and educational use ONLY. For actual design or modeling applications you MUST use a full version of HydroCAD which may be purchased at www.hydrocad.net. Full programs also include complete technical support,training materials, and additional features which are essential for actual design work. Summary for Reach 5R: Proposed Runoff [40] Hint: Not Described (Outflow=Inflow) Inflow Area = 1.912 ac, 19.99% Impervious, Inflow Depth > 3.47" for 100-Year event Inflow = 7.15 cfs @ 12.14 hrs, Volume= 0.553 af Outflow = 7.15 cfs @ 12.14 hrs, Volume= 0.553 af, Atten= 0%, Lag= 0.0 min Routing by Stor-Ind+Trans method, Time Span= 5.00-24.00 hrs, dt= 0.05 hrs Reach 5R: Proposed Runoff Inflow Outflow Hydrograph Time (hours) 24232221201918171615141312111098765Flow (cfs)8 7 6 5 4 3 2 1 0 Inflow Area=1.912 ac 7.15 cfs 7.15 cfs Type II 24-hr 100-Year Rainfall=5.90"Glendale Drive Homes-R1 Printed 10/11/2018Prepared by HydroCAD SAMPLER 1-800-927-7246 www.hydrocad.net Page 24HydroCAD® 10.00-22 Sampler s/n S27829 © 2018 HydroCAD Software Solutions LLC This report was prepared with the free HydroCAD SAMPLER, which is licensed for evaluation and educational use ONLY. For actual design or modeling applications you MUST use a full version of HydroCAD which may be purchased at www.hydrocad.net. Full programs also include complete technical support,training materials, and additional features which are essential for actual design work. Summary for Pond 3P: Lot 5 Pond Inflow Area = 1.320 ac, 28.96% Impervious, Inflow Depth > 3.78" for 100-Year event Inflow = 5.52 cfs @ 12.12 hrs, Volume= 0.415 af Outflow = 5.23 cfs @ 12.17 hrs, Volume= 0.401 af, Atten= 5%, Lag= 2.8 min Primary = 5.23 cfs @ 12.17 hrs, Volume= 0.401 af Routing by Stor-Ind method, Time Span= 5.00-24.00 hrs, dt= 0.05 hrs / 4 Starting Elev= 971.50' Surf.Area= 816 sf Storage= 326 cf Peak Elev= 972.93' @ 12.17 hrs Surf.Area= 1,968 sf Storage= 2,290 cf (1,964 cf above start) Plug-Flow detention time= 48.1 min calculated for 0.392 af (94% of inflow) Center-of-Mass det. time= 15.3 min ( 834.7 - 819.3 ) Volume Invert Avail.Storage Storage Description #1 971.00' 2,434 cf Custom Stage Data (Pyramidal) Listed below (Recalc) Elevation Surf.Area Inc.Store Cum.Store Wet.Area (feet) (sq-ft) (cubic-feet) (cubic-feet) (sq-ft) 971.00 500 0 0 500 972.00 1,210 829 829 1,219 973.00 2,035 1,605 2,434 2,059 Device Routing Invert Outlet Devices #1 Primary 972.00'Custom Weir/Orifice, Cv= 3.28 (C= 4.10) Head (feet) 0.00 1.00 Width (feet) 0.50 3.00 Primary OutFlow Max=5.16 cfs @ 12.17 hrs HW=972.92' (Free Discharge) 1=Custom Weir/Orifice (Weir Controls 5.16 cfs @ 3.39 fps) Type II 24-hr 100-Year Rainfall=5.90"Glendale Drive Homes-R1 Printed 10/11/2018Prepared by HydroCAD SAMPLER 1-800-927-7246 www.hydrocad.net Page 25HydroCAD® 10.00-22 Sampler s/n S27829 © 2018 HydroCAD Software Solutions LLC This report was prepared with the free HydroCAD SAMPLER, which is licensed for evaluation and educational use ONLY. For actual design or modeling applications you MUST use a full version of HydroCAD which may be purchased at www.hydrocad.net. Full programs also include complete technical support,training materials, and additional features which are essential for actual design work. Pond 3P: Lot 5 Pond Inflow Primary Hydrograph Time (hours) 24232221201918171615141312111098765Flow (cfs)6 5 4 3 2 1 0 Inflow Area=1.320 ac Peak Elev=972.93' Storage=2,290 cf 5.52 cfs 5.23 cfs Type II 24-hr Custom Rainfall=4.20"Glendale Drive Homes-R1 Printed 10/11/2018Prepared by HydroCAD SAMPLER 1-800-927-7246 www.hydrocad.net Page 26HydroCAD® 10.00-22 Sampler s/n S27829 © 2018 HydroCAD Software Solutions LLC This report was prepared with the free HydroCAD SAMPLER, which is licensed for evaluation and educational use ONLY. For actual design or modeling applications you MUST use a full version of HydroCAD which may be purchased at www.hydrocad.net. Full programs also include complete technical support,training materials, and additional features which are essential for actual design work. Time span=5.00-24.00 hrs, dt=0.05 hrs, 381 points Runoff by SCS TR-20 method, UH=SCS, Weighted-CN Reach routing by Stor-Ind+Trans method - Pond routing by Stor-Ind method Runoff Area=83,305 sf 0.00% Impervious Runoff Depth>1.89"Subcatchment 1S: Existing Runoff Tc=15.0 min CN=76 Runoff=4.62 cfs 0.301 af Runoff Area=57,500 sf 28.96% Impervious Runoff Depth>2.28"Subcatchment 2S: Lots 1-5 Tc=20.0 min CN=81 Runoff=3.34 cfs 0.251 af Runoff Area=25,805 sf 0.00% Impervious Runoff Depth>1.74"Subcatchment 4S: Front Yards Tc=15.0 min CN=74 Runoff=1.31 cfs 0.086 af Inflow=4.12 cfs 0.323 afReach 5R: Proposed Runoff Outflow=4.12 cfs 0.323 af Peak Elev=972.72' Storage=1,907 cf Inflow=3.34 cfs 0.251 afPond 3P: Lot 5 Pond Outflow=3.09 cfs 0.237 af Total Runoff Area = 3.825 ac Runoff Volume = 0.637 af Average Runoff Depth = 2.00" 90.01% Pervious = 3.443 ac 9.99% Impervious = 0.382 ac Type II 24-hr Custom Rainfall=4.20"Glendale Drive Homes-R1 Printed 10/11/2018Prepared by HydroCAD SAMPLER 1-800-927-7246 www.hydrocad.net Page 27HydroCAD® 10.00-22 Sampler s/n S27829 © 2018 HydroCAD Software Solutions LLC This report was prepared with the free HydroCAD SAMPLER, which is licensed for evaluation and educational use ONLY. For actual design or modeling applications you MUST use a full version of HydroCAD which may be purchased at www.hydrocad.net. Full programs also include complete technical support,training materials, and additional features which are essential for actual design work. Summary for Subcatchment 1S: Existing Runoff Runoff = 4.62 cfs @ 12.08 hrs, Volume= 0.301 af, Depth> 1.89" Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 5.00-24.00 hrs, dt= 0.05 hrs Type II 24-hr Custom Rainfall=4.20" Area (sf) CN Description 83,305 76 Woods/grass comb., Fair, HSG C 83,305 100.00% Pervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 15.0 Direct Entry, Subcatchment 1S: Existing Runoff Runoff Hydrograph Time (hours) 24232221201918171615141312111098765Flow (cfs)5 4 3 2 1 0 Type II 24-hr Custom Rainfall=4.20" Runoff Area=83,305 sf Runoff Volume=0.301 af Runoff Depth>1.89" Tc=15.0 min CN=76 4.62 cfs Type II 24-hr Custom Rainfall=4.20"Glendale Drive Homes-R1 Printed 10/11/2018Prepared by HydroCAD SAMPLER 1-800-927-7246 www.hydrocad.net Page 28HydroCAD® 10.00-22 Sampler s/n S27829 © 2018 HydroCAD Software Solutions LLC This report was prepared with the free HydroCAD SAMPLER, which is licensed for evaluation and educational use ONLY. For actual design or modeling applications you MUST use a full version of HydroCAD which may be purchased at www.hydrocad.net. Full programs also include complete technical support,training materials, and additional features which are essential for actual design work. Summary for Subcatchment 2S: Lots 1-5 Runoff = 3.34 cfs @ 12.13 hrs, Volume= 0.251 af, Depth> 2.28" Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 5.00-24.00 hrs, dt= 0.05 hrs Type II 24-hr Custom Rainfall=4.20" Area (sf) CN Description 16,650 98 Roofs, HSG C 40,850 74 >75% Grass cover, Good, HSG C 57,500 81 Weighted Average 40,850 71.04% Pervious Area 16,650 28.96% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 20.0 Direct Entry, Subcatchment 2S: Lots 1-5 Runoff Hydrograph Time (hours) 24232221201918171615141312111098765Flow (cfs)3 2 1 0 Type II 24-hr Custom Rainfall=4.20" Runoff Area=57,500 sf Runoff Volume=0.251 af Runoff Depth>2.28" Tc=20.0 min CN=81 3.34 cfs Type II 24-hr Custom Rainfall=4.20"Glendale Drive Homes-R1 Printed 10/11/2018Prepared by HydroCAD SAMPLER 1-800-927-7246 www.hydrocad.net Page 29HydroCAD® 10.00-22 Sampler s/n S27829 © 2018 HydroCAD Software Solutions LLC This report was prepared with the free HydroCAD SAMPLER, which is licensed for evaluation and educational use ONLY. For actual design or modeling applications you MUST use a full version of HydroCAD which may be purchased at www.hydrocad.net. Full programs also include complete technical support,training materials, and additional features which are essential for actual design work. Summary for Subcatchment 4S: Front Yards Runoff = 1.31 cfs @ 12.08 hrs, Volume= 0.086 af, Depth> 1.74" Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 5.00-24.00 hrs, dt= 0.05 hrs Type II 24-hr Custom Rainfall=4.20" Area (sf) CN Description 4,200 74 >75% Grass cover, Good, HSG C 21,605 74 >75% Grass cover, Good, HSG C 25,805 74 Weighted Average 25,805 100.00% Pervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 15.0 Direct Entry, Subcatchment 4S: Front Yards Runoff Hydrograph Time (hours) 24232221201918171615141312111098765Flow (cfs)1 0 Type II 24-hr Custom Rainfall=4.20" Runoff Area=25,805 sf Runoff Volume=0.086 af Runoff Depth>1.74" Tc=15.0 min CN=74 1.31 cfs Type II 24-hr Custom Rainfall=4.20"Glendale Drive Homes-R1 Printed 10/11/2018Prepared by HydroCAD SAMPLER 1-800-927-7246 www.hydrocad.net Page 30HydroCAD® 10.00-22 Sampler s/n S27829 © 2018 HydroCAD Software Solutions LLC This report was prepared with the free HydroCAD SAMPLER, which is licensed for evaluation and educational use ONLY. For actual design or modeling applications you MUST use a full version of HydroCAD which may be purchased at www.hydrocad.net. Full programs also include complete technical support,training materials, and additional features which are essential for actual design work. Summary for Reach 5R: Proposed Runoff [40] Hint: Not Described (Outflow=Inflow) Inflow Area = 1.912 ac, 19.99% Impervious, Inflow Depth > 2.02" for Custom event Inflow = 4.12 cfs @ 12.15 hrs, Volume= 0.323 af Outflow = 4.12 cfs @ 12.15 hrs, Volume= 0.323 af, Atten= 0%, Lag= 0.0 min Routing by Stor-Ind+Trans method, Time Span= 5.00-24.00 hrs, dt= 0.05 hrs Reach 5R: Proposed Runoff Inflow Outflow Hydrograph Time (hours) 24232221201918171615141312111098765Flow (cfs)4 3 2 1 0 Inflow Area=1.912 ac 4.12 cfs 4.12 cfs Type II 24-hr Custom Rainfall=4.20"Glendale Drive Homes-R1 Printed 10/11/2018Prepared by HydroCAD SAMPLER 1-800-927-7246 www.hydrocad.net Page 31HydroCAD® 10.00-22 Sampler s/n S27829 © 2018 HydroCAD Software Solutions LLC This report was prepared with the free HydroCAD SAMPLER, which is licensed for evaluation and educational use ONLY. For actual design or modeling applications you MUST use a full version of HydroCAD which may be purchased at www.hydrocad.net. Full programs also include complete technical support,training materials, and additional features which are essential for actual design work. Summary for Pond 3P: Lot 5 Pond Inflow Area = 1.320 ac, 28.96% Impervious, Inflow Depth > 2.28" for Custom event Inflow = 3.34 cfs @ 12.13 hrs, Volume= 0.251 af Outflow = 3.09 cfs @ 12.19 hrs, Volume= 0.237 af, Atten= 7%, Lag= 3.5 min Primary = 3.09 cfs @ 12.19 hrs, Volume= 0.237 af Routing by Stor-Ind method, Time Span= 5.00-24.00 hrs, dt= 0.05 hrs / 4 Starting Elev= 971.50' Surf.Area= 816 sf Storage= 326 cf Peak Elev= 972.72' @ 12.19 hrs Surf.Area= 1,786 sf Storage= 1,907 cf (1,581 cf above start) Plug-Flow detention time= 66.3 min calculated for 0.229 af (91% of inflow) Center-of-Mass det. time= 18.1 min ( 851.6 - 833.5 ) Volume Invert Avail.Storage Storage Description #1 971.00' 2,434 cf Custom Stage Data (Pyramidal) Listed below (Recalc) Elevation Surf.Area Inc.Store Cum.Store Wet.Area (feet) (sq-ft) (cubic-feet) (cubic-feet) (sq-ft) 971.00 500 0 0 500 972.00 1,210 829 829 1,219 973.00 2,035 1,605 2,434 2,059 Device Routing Invert Outlet Devices #1 Primary 972.00'Custom Weir/Orifice, Cv= 3.28 (C= 4.10) Head (feet) 0.00 1.00 Width (feet) 0.50 3.00 Primary OutFlow Max=3.06 cfs @ 12.19 hrs HW=972.72' (Free Discharge) 1=Custom Weir/Orifice (Weir Controls 3.06 cfs @ 3.03 fps) Type II 24-hr Custom Rainfall=4.20"Glendale Drive Homes-R1 Printed 10/11/2018Prepared by HydroCAD SAMPLER 1-800-927-7246 www.hydrocad.net Page 32HydroCAD® 10.00-22 Sampler s/n S27829 © 2018 HydroCAD Software Solutions LLC This report was prepared with the free HydroCAD SAMPLER, which is licensed for evaluation and educational use ONLY. For actual design or modeling applications you MUST use a full version of HydroCAD which may be purchased at www.hydrocad.net. Full programs also include complete technical support,training materials, and additional features which are essential for actual design work. Pond 3P: Lot 5 Pond Inflow Primary Hydrograph Time (hours) 24232221201918171615141312111098765Flow (cfs)3 2 1 0 Inflow Area=1.320 ac Peak Elev=972.72' Storage=1,907 cf 3.34 cfs 3.09 cfs