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STORMWATER MANAGEMENT REPORT
CROWN MERCEDES
CITY OF DUBLIN, FRANKLIN COUNTY, OHIO
Prepared By:
ENGINEERS & SURVEYORS
422 BEECHER ROAD GAHANNA, OHIO 43230
Ph: 614‐428‐7750 Fax: 614‐428‐7755
Date: April 8, 2017
City of Dublin Crown Mercedes April 8, 2017
2
TABLE OF CONTENTS
STORMWATER MANAGEMENT REVIEW:
Site Summary: ............................................................................................................................................... 3
Design Methodology: .................................................................................................................................... 3
Pre‐Developed Conditions: ........................................................................................................................... 3
Post‐Construction Conditions: ...................................................................................................................... 3
Critical Storm: ............................................................................................................................................... 4
Allowable Release Rates: .............................................................................................................................. 4
Stormwater Quantity Control: ...................................................................................................................... 4
Stormwater Quality Control:......................................................................................................................... 5
Conclusion: .................................................................................................................................................... 5
APPENDICES:
APPENDIX A: Tributary Map APPENDIX B: Soil Survey APPENDIX C: Pre‐Developed HydroCAD Calculations APPENDIX D: Post‐Developed HydroCAD Calculations APPENDIX E: Water Quality Calculations
City of Dublin Crown Mercedes April 8, 2017
3
SiteSummary:The Crown Mercedes project is located on the north side of Perimeter Loop Road in the City of Dublin, Franklin County, Ohio. The project site is surrounded by existing Private road Mercedes Drive to the north, Commercial property to the east, and Perimeter Loop Road to the south and west. The total site is approximately 5.85 acres and consists of an existing auto dealership. The project consists of building additions and necessary site support work.
DesignMethodology:Stormwater management calculations within this report follow the guidance of the City of Dublin, Stormwater Management Design Manual (dated June, 2013), for the water quantity and water quality requirements. Hydrology and hydraulics were modeled with the HydroCAD software suite using TR‐55 methodology and a Type‐II rainfall distribution. Pond routing for the project will be performed using the storage indication method. Located in the City of Dublin, Stormwater Management Design Manual, are the precipitation frequencies for the 1, 2, 5, 10, 25, 50, and 100 year storm events used to evaluate rainfall and runoff.
Design Event (yr) 1 2 5 10 25 50 100
Rainfall Depth (in) 2.20 2.63 3.24 3.74 4.44 5.02 5.63
Table 1 ‐ Design Storm Rainfall Depths
Pre‐DevelopedConditions:A review of the Franklin County soil maps show that this site is underlain predominately by Kokomo silty clay‐loam and Lewisburg‐Crosby Complex with a small fraction of Crosby silt‐loam. These soils are classified within hydrologic groups “D”. The existing site is located within the South Fork Indian Run Watershed. The onsite runoff is divided into three watersheds, Northwest, North‐Northeast, and South. The site predominately is located with the Sub‐basin 1390 with a small portion of each the Northwest and South watersheds located in Sub‐Basin 1400. This report will only analyze the onsite watersheds being impacted by the proposed redevelopment. Pre‐development runoff volume was only calculated to the 1390 – South portion of the site as this is the main controlling factor for site release on the project.
Area CN Impervious area 1‐yr, 24 hr runoff volume
Sub‐Basin (acres) (acres) (ac‐ft)
1390 – North‐Northeast 1.726 94 1.344 0.228
1390 ‐ South 1.654 92 1.128 0.195
1400 ‐ South 0.328 87 0.124 0.029
Table 2 ‐ Pre‐Developed Hydrology Summary
Post‐ConstructionConditions:The redevelopment consists of building additions, along with some minor parking lot changes. The proposed building addition located in the North‐Northeast watershed will not increase the impervious surface and therefor no changes will be required to the existing stormwater management system. This portion of the site will not be further analyzed in this report. The South watershed improvements will increase the impervious surface and therefor increase the runoff. This portion of the site will be further analyzed in this report, below is a summary of the post‐development conditions. This summary includes the portion of the site that is located in Sub‐basin 1400.
City of Dublin Crown Mercedes April 8, 2017
4
Area CN Impervious area 1‐yr, 24 hr runoff volume
Name (acres) (acres) (ac‐ft)
Disturbed Watershed 1.982 93 1.386 0.248
Table 3 ‐ Post‐Developed Hydrology Summary
CriticalStorm:Per the City of Dublin’s, Stormwater Management Design Manual, a critical storm event was computed by evaluating the increase in runoff volume created by the development. Using the scs curve number method, runoff depths from a 2.2 inch rainfall event (1‐yr) were calculated.
Percent Increase = [(QPost ‐ QPre) / QPre] * 100 [(0.248 – 0.195) / 0.195] * 100 = 27%
Critical Storm = 5‐yr strom
AllowableReleaseRates:The allowable release is based on the City of Dublin’s Stormwater Master Plan and the watershed the site is located in. This site in located in the South Fork Indian Run Watershed, Sub‐basin 1390, and Table 4 below summarizes the release rate requirements per Dublin’s Master Stormwater Plan.
1 2 5 10 25 50 100
(cfs/ac) (cfs/ac) (cfs/ac) (cfs/ac) (cfs/ac) (cfs/ac) (cfs/ac)
Sub‐Basin 1390 0.9 1.1 1.4 1.7 2.2 2.9 3.6
Table 4 – Release Rate Requirements
StormwaterQuantityControl:Control of storm water runoff from the disturbed onsite watershed will be accomplished within an underground ADS StormTech system designed to restrict discharges below the allowable peak rates of runoff and provide the required water quality treatment. Table 5 below provides the site stormwater runoff summary and Table 6 below provides the storage requirements for the underground detention system. Allowable release rates are based on Sub‐basin 1390 area only (release rate x 1.654 acres).
1 2 5 10 25 50 100
Pre‐developed Q (cfs) 3.50 4.43 5.76 6.84 8.35 9.59 10.90
Post‐developed Q (cfs) 4.40 5.52 7.10 8.39 10.20 11.68 13.23
Allowable Release (cfs) 1.49 1.49 1.49 2.81 3.64 4.80 5.95
Actual release (cfs)* 0.94 1.18 1.45 2.27 3.59 3.42 4.26
Table 5 – Stormwater Runoff Summary *_See Release Rates from the StormTech System nodes in Appendix J
Location Available
(cf) Required
(cf) Elevation
Depth (ft)
TC Elev.
Area (sf)
Control Feature
Catch Basin #2 1,713 402 917.98 0.31 917.67 402 10.5” Orifice
Catch basin #4 3,232 2,835 918.51 1.29 917.22 2,877 12” Pipe
SC‐740 Units 11,764 11,666 916.38 4.18 917.00 5,086 Structure
Table 6 – 100‐yr Ponding and Storage Summary *Perimeter stone calculated in storage utilizing 40% stone void
Bottom of perimeter stone = 912.20 ‐ Top of perimeter stone = 916.43
City of Dublin Crown Mercedes April 8, 2017
5
StormwaterQualityControl:Per the City of Dublin and the Ohio EPA General Construction Permit, a stormwater best management practice (BMP) is required to treat the first flush runoff volume produced by a ¾” rainfall event. For redevelopment projects that are a combination of new development and redevelopment that had no post‐construction BMP installed, the Ohio EPA General Construction requires the total WQv that must be treated to be, the new development at 100 percent WQv and redevelopment at 20 percent WQv. The WQv was calculated using the equation below, the site will use an underground detention system with an Isolator ROW to treat the total WQv requirement. The water quality volume will be detained for a minimum period of 48 hours, releasing less than half of the volume in the first 16 hours. See Appendix E for calculations and drawdown table.
WQv = (C*P*A/12)
BMP Tributary Area
WQv Required
20% Sediment StorageRequired
Total WQv Required
WQv Provided
WQ Elevation
(acres) (ft3) (ft3) (ft3) (ft3) (ft)
New development 0.122 296 59 355 ‐ ‐
Redevelopment 2.032 547 109 656 ‐ ‐
Total 2.154 843 168 1,011 1,017 912.70
Table 7 ‐ Water Quality Volume Summary
Conclusion:The Crown Mercedes site provides surface and subsurface stormwater conveyances to carry runoff safely through the development into the stormwater management system. The disturbed watershed stormwater management is controlled by an outlet structure within the StormTech Detention System. The proposed system provides peak flow rate control and extended drawdown of captured water to comply with the City of Dublin’s peak control requirements and Ohio EPA’s water quality regulations.
APPENDIX A
TRIBUTARY MAP
Perimeter Loop Road (60' R/W)
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1 / 1
VICINITY MAP
GRAPHIC SCALE0
1 inch = 40 feet
8020 40
ADVANCED CIVIL DESIGN, INC.
ENGINEER
ARCHITECTURAL ALLIANCE
ARCHITECT
LEGEND
PARKING CALCULATIONS
OPEN SPACE CALCULATIONS
SITE ZONING INFORMATION
APPENDIX B
SOIL SURVEY
Soil Map—Franklin County, Ohio(Crown Mercedes Site)
Natural ResourcesConservation Service
Web Soil SurveyNational Cooperative Soil Survey
5/9/2017Page 1 of 3
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316130 316160 316190 316220 316250 316280 316310 316340 316370 316400 316430
316130 316160 316190 316220 316250 316280 316310 316340 316370 316400 316430
40° 6' 5'' N83
° 9
' 25'
' W40° 6' 5'' N
83° 9
' 12'
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40° 5' 58'' N
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Map projection: Web Mercator Corner coordinates: WGS84 Edge tics: UTM Zone 17N WGS840 50 100 200 300
Feet0 20 40 80 120
MetersMap Scale: 1:1,440 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)
SoilsSoil Map Unit Polygons
Soil Map Unit Lines
Soil Map Unit Points
Special Point FeaturesBlowout
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 FeaturesStreams and Canals
TransportationRails
Interstate Highways
US Routes
Major Roads
Local Roads
BackgroundAerial Photography
The soil surveys that comprise your AOI were mapped at1:15,800.
Warning: Soil Map may not be valid at this scale.
Enlargement of maps beyond the scale of mapping can causemisunderstanding of the detail of mapping and accuracy of soilline placement. The maps do not show the small areas ofcontrasting soils that could have been shown at a more detailedscale.
Please rely on the bar scale on each map sheet for mapmeasurements.
Source of Map: Natural Resources Conservation ServiceWeb Soil Survey URL:Coordinate System: Web Mercator (EPSG:3857)
Maps from the Web Soil Survey are based on the Web Mercatorprojection, which preserves direction and shape but distortsdistance and area. A projection that preserves area, such as theAlbers equal-area conic projection, should be used if moreaccurate calculations of distance or area are required.
This product is generated from the USDA-NRCS certified data asof the version date(s) listed below.
Soil Survey Area: Franklin County, OhioSurvey Area Data: Version 14, Sep 22, 2016
Soil map units are labeled (as space allows) for map scales1:50,000 or larger.
Date(s) aerial images were photographed: Aug 4, 2014—Aug27, 2014
The orthophoto or other base map on which the soil lines werecompiled and digitized probably differs from the backgroundimagery displayed on these maps. As a result, some minorshifting of map unit boundaries may be evident.
Soil Map—Franklin County, Ohio(Crown Mercedes Site)
Natural ResourcesConservation Service
Web Soil SurveyNational Cooperative Soil Survey
5/9/2017Page 2 of 3
Map Unit Legend
Franklin County, Ohio (OH049)
Map Unit Symbol Map Unit Name Acres in AOI Percent of AOI
CrA Crosby silt loam, SouthernOhio Till Plain, 0 to 2 percentslopes
0.2 3.8%
Ko Kokomo silty clay loam, 0 to 2percent slopes
1.9 30.1%
LeB Lewisburg-Crosby complex, 2to 6 percent slopes
4.1 66.1%
Totals for Area of Interest 6.2 100.0%
Soil Map—Franklin County, Ohio Crown Mercedes Site
Natural ResourcesConservation Service
Web Soil SurveyNational Cooperative Soil Survey
5/9/2017Page 3 of 3
APPENDIX C
PRE-DEVELOPMENT HYDROCAD CALCULATIONS
Type II 24-hr Dublin 001 Rainfall=2.20"17-0001-837 Crown Mercedes Printed 5/31/2017Prepared by Advanced Civil Design
Page 1HydroCAD® 10.00-17 s/n 09322 © 2016 HydroCAD Software Solutions LLC
Summary for Subcatchment 1S: Pre-Dev (North-Northeast)
Runoff = 4.00 cfs @ 12.01 hrs, Volume= 0.228 af, Depth= 1.58"
Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-48.00 hrs, dt= 0.05 hrsType II 24-hr Dublin 001 Rainfall=2.20"
Area (ac) CN Description* 1.344 98* 0.382 80
1.726 94 Weighted Average0.382 22.13% Pervious Area1.344 77.87% Impervious Area
Tc Length Slope Velocity Capacity Description(min) (feet) (ft/ft) (ft/sec) (cfs)10.0 Direct Entry, Storm Sewer Minimu m
Summary for Subcatchment 2S: Pre-Dev (1390-South)
Runoff = 3.50 cfs @ 12.01 hrs, Volume= 0.195 af, Depth= 1.42"
Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-48.00 hrs, dt= 0.05 hrsType II 24-hr Dublin 001 Rainfall=2.20"
Area (ac) CN Description* 0.526 80 Grass* 1.128 98 Pavement
1.654 92 Weighted Average0.526 31.80% Pervious Area1.128 68.20% Impervious Area
Tc Length Slope Velocity Capacity Description(min) (feet) (ft/ft) (ft/sec) (cfs)10.0 Direct Entry, Storm Sewer Minimum
Summary for Subcatchment 3S: Pre-Dev (1400-South)
Runoff = 0.53 cfs @ 12.02 hrs, Volume= 0.029 af, Depth= 1.06"
Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-48.00 hrs, dt= 0.05 hrsType II 24-hr Dublin 001 Rainfall=2.20"
Area (ac) CN Description* 0.124 98 Pavement* 0.204 80 Grass
0.328 87 Weighted Average0.204 62.20% Pervious Area0.124 37.80% Impervious Area
Type II 24-hr Dublin 001 Rainfall=2.20"17-0001-837 Crown Mercedes Printed 5/31/2017Prepared by Advanced Civil Design
Page 2HydroCAD® 10.00-17 s/n 09322 © 2016 HydroCAD Software Solutions LLC
Tc Length Slope Velocity Capacity Description(min) (feet) (ft/ft) (ft/sec) (cfs)10.0 Direct Entry, Storm Sewer Minimum
Type II 24-hr Dublin 001 Rainfall=2.20"17-0001-837 Crown Mercedes Printed 5/31/2017Prepared by Advanced Civil Design
Page 1HydroCAD® 10.00-17 s/n 09322 © 2016 HydroCAD Software Solutions LLC
Summary for Subcatchment 2S: Pre-Dev (1390-South)
Runoff = 3.50 cfs @ 12.01 hrs, Volume= 0.195 af, Depth= 1.42"
Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-48.00 hrs, dt= 0.05 hrsType II 24-hr Dublin 001 Rainfall=2.20"
Area (ac) CN Description* 0.526 80 Grass* 1.128 98 Pavement
1.654 92 Weighted Average0.526 31.80% Pervious Area1.128 68.20% Impervious Area
Tc Length Slope Velocity Capacity Description(min) (feet) (ft/ft) (ft/sec) (cfs)10.0 Direct Entry, Storm Sewer Minimum
Subcatchment 2S: Pre-Dev (1390-South)
Runoff
Hydrograph
Time (hours)484644424038363432302826242220181614121086420
Flo
w (
cfs)
3
2
1
0
Type II 24-hrDublin 001 Rainfall=2.20"
Runoff Area=1.654 acRunoff Volume=0.195 af
Runoff Depth=1.42"Tc=10.0 min
CN=92
3.50 cfs
Type II 24-hr Dublin 002 Rainfall=2.63"17-0001-837 Crown Mercedes Printed 5/31/2017Prepared by Advanced Civil Design
Page 2HydroCAD® 10.00-17 s/n 09322 © 2016 HydroCAD Software Solutions LLC
Summary for Subcatchment 2S: Pre-Dev (1390-South)
Runoff = 4.43 cfs @ 12.01 hrs, Volume= 0.250 af, Depth= 1.81"
Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-48.00 hrs, dt= 0.05 hrsType II 24-hr Dublin 002 Rainfall=2.63"
Area (ac) CN Description* 0.526 80 Grass* 1.128 98 Pavement
1.654 92 Weighted Average0.526 31.80% Pervious Area1.128 68.20% Impervious Area
Tc Length Slope Velocity Capacity Description(min) (feet) (ft/ft) (ft/sec) (cfs)10.0 Direct Entry, Storm Sewer Minimum
Subcatchment 2S: Pre-Dev (1390-South)
Runoff
Hydrograph
Time (hours)484644424038363432302826242220181614121086420
Flo
w (
cfs)
4
3
2
1
0
Type II 24-hrDublin 002 Rainfall=2.63"
Runoff Area=1.654 acRunoff Volume=0.250 af
Runoff Depth=1.81"Tc=10.0 min
CN=92
4.43 cfs
Type II 24-hr Dublin 005 Rainfall=3.24"17-0001-837 Crown Mercedes Printed 5/31/2017Prepared by Advanced Civil Design
Page 3HydroCAD® 10.00-17 s/n 09322 © 2016 HydroCAD Software Solutions LLC
Summary for Subcatchment 2S: Pre-Dev (1390-South)
Runoff = 5.76 cfs @ 12.01 hrs, Volume= 0.329 af, Depth= 2.39"
Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-48.00 hrs, dt= 0.05 hrsType II 24-hr Dublin 005 Rainfall=3.24"
Area (ac) CN Description* 0.526 80 Grass* 1.128 98 Pavement
1.654 92 Weighted Average0.526 31.80% Pervious Area1.128 68.20% Impervious Area
Tc Length Slope Velocity Capacity Description(min) (feet) (ft/ft) (ft/sec) (cfs)10.0 Direct Entry, Storm Sewer Minimum
Subcatchment 2S: Pre-Dev (1390-South)
Runoff
Hydrograph
Time (hours)484644424038363432302826242220181614121086420
Flo
w (
cfs)
6
5
4
3
2
1
0
Type II 24-hrDublin 005 Rainfall=3.24"
Runoff Area=1.654 acRunoff Volume=0.329 af
Runoff Depth=2.39"Tc=10.0 min
CN=92
5.76 cfs
Type II 24-hr Dublin 010 Rainfall=3.74"17-0001-837 Crown Mercedes Printed 5/31/2017Prepared by Advanced Civil Design
Page 4HydroCAD® 10.00-17 s/n 09322 © 2016 HydroCAD Software Solutions LLC
Summary for Subcatchment 2S: Pre-Dev (1390-South)
Runoff = 6.84 cfs @ 12.01 hrs, Volume= 0.395 af, Depth= 2.87"
Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-48.00 hrs, dt= 0.05 hrsType II 24-hr Dublin 010 Rainfall=3.74"
Area (ac) CN Description* 0.526 80 Grass* 1.128 98 Pavement
1.654 92 Weighted Average0.526 31.80% Pervious Area1.128 68.20% Impervious Area
Tc Length Slope Velocity Capacity Description(min) (feet) (ft/ft) (ft/sec) (cfs)10.0 Direct Entry, Storm Sewer Minimum
Subcatchment 2S: Pre-Dev (1390-South)
Runoff
Hydrograph
Time (hours)484644424038363432302826242220181614121086420
Flo
w (
cfs)
7
6
5
4
3
2
1
0
Type II 24-hrDublin 010 Rainfall=3.74"
Runoff Area=1.654 acRunoff Volume=0.395 af
Runoff Depth=2.87"Tc=10.0 min
CN=92
6.84 cfs
Type II 24-hr Dublin 025 Rainfall=4.44"17-0001-837 Crown Mercedes Printed 5/31/2017Prepared by Advanced Civil Design
Page 5HydroCAD® 10.00-17 s/n 09322 © 2016 HydroCAD Software Solutions LLC
Summary for Subcatchment 2S: Pre-Dev (1390-South)
Runoff = 8.35 cfs @ 12.01 hrs, Volume= 0.488 af, Depth= 3.54"
Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-48.00 hrs, dt= 0.05 hrsType II 24-hr Dublin 025 Rainfall=4.44"
Area (ac) CN Description* 0.526 80 Grass* 1.128 98 Pavement
1.654 92 Weighted Average0.526 31.80% Pervious Area1.128 68.20% Impervious Area
Tc Length Slope Velocity Capacity Description(min) (feet) (ft/ft) (ft/sec) (cfs)10.0 Direct Entry, Storm Sewer Minimum
Subcatchment 2S: Pre-Dev (1390-South)
Runoff
Hydrograph
Time (hours)484644424038363432302826242220181614121086420
Flo
w (
cfs)
9
8
7
6
5
4
3
2
1
0
Type II 24-hrDublin 025 Rainfall=4.44"
Runoff Area=1.654 acRunoff Volume=0.488 af
Runoff Depth=3.54"Tc=10.0 min
CN=92
8.35 cfs
Type II 24-hr Dublin 050 Rainfall=5.02"17-0001-837 Crown Mercedes Printed 5/31/2017Prepared by Advanced Civil Design
Page 6HydroCAD® 10.00-17 s/n 09322 © 2016 HydroCAD Software Solutions LLC
Summary for Subcatchment 2S: Pre-Dev (1390-South)
Runoff = 9.59 cfs @ 12.01 hrs, Volume= 0.566 af, Depth= 4.11"
Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-48.00 hrs, dt= 0.05 hrsType II 24-hr Dublin 050 Rainfall=5.02"
Area (ac) CN Description* 0.526 80 Grass* 1.128 98 Pavement
1.654 92 Weighted Average0.526 31.80% Pervious Area1.128 68.20% Impervious Area
Tc Length Slope Velocity Capacity Description(min) (feet) (ft/ft) (ft/sec) (cfs)10.0 Direct Entry, Storm Sewer Minimum
Subcatchment 2S: Pre-Dev (1390-South)
Runoff
Hydrograph
Time (hours)484644424038363432302826242220181614121086420
Flo
w (
cfs)
10
9
8
7
6
5
4
3
2
1
0
Type II 24-hrDublin 050 Rainfall=5.02"
Runoff Area=1.654 acRunoff Volume=0.566 af
Runoff Depth=4.11"Tc=10.0 min
CN=92
9.59 cfs
Type II 24-hr Dublin 100 Rainfall=5.63"17-0001-837 Crown Mercedes Printed 5/31/2017Prepared by Advanced Civil Design
Page 7HydroCAD® 10.00-17 s/n 09322 © 2016 HydroCAD Software Solutions LLC
Summary for Subcatchment 2S: Pre-Dev (1390-South)
Runoff = 10.90 cfs @ 12.01 hrs, Volume= 0.649 af, Depth= 4.71"
Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-48.00 hrs, dt= 0.05 hrsType II 24-hr Dublin 100 Rainfall=5.63"
Area (ac) CN Description* 0.526 80 Grass* 1.128 98 Pavement
1.654 92 Weighted Average0.526 31.80% Pervious Area1.128 68.20% Impervious Area
Tc Length Slope Velocity Capacity Description(min) (feet) (ft/ft) (ft/sec) (cfs)10.0 Direct Entry, Storm Sewer Minimum
Subcatchment 2S: Pre-Dev (1390-South)
Runoff
Hydrograph
Time (hours)484644424038363432302826242220181614121086420
Flo
w (
cfs)
12
11
10
9
8
7
6
5
4
3
2
1
0
Type II 24-hrDublin 100 Rainfall=5.63"
Runoff Area=1.654 acRunoff Volume=0.649 af
Runoff Depth=4.71"Tc=10.0 min
CN=92
10.90 cfs
APPENDIX D
POST-DEVELOPED HYDROCAD CALCULATIONS
Type II 24-hr Dublin 001 Rainfall=2.20"17-0001-837 Crown Mercedes Printed 5/31/2017Prepared by Advanced Civil Design
Page 1HydroCAD® 10.00-17 s/n 09322 © 2016 HydroCAD Software Solutions LLC
Summary for Subcatchment 4S: Post-Construction Area
Runoff = 4.40 cfs @ 12.01 hrs, Volume= 0.248 af, Depth= 1.50"
Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-48.00 hrs, dt= 0.05 hrsType II 24-hr Dublin 001 Rainfall=2.20"
Area (ac) CN Description* 0.118 80 Str #3 Trib Area - Grass* 0.205 98 Str #3 Trib Area - Pavement* 0.329 80 Str #5 Trib Area - Grass* 0.631 98 Str #5 Trib Area - Pavement* 0.149 80 Str #7 Trib Area - Grass* 0.244 98 Str #7 Trib Area - Pavement* 0.306 98 Roof Top Area
1.982 93 Weighted Average0.596 30.07% Pervious Area1.386 69.93% Impervious Area
Tc Length Slope Velocity Capacity Description(min) (feet) (ft/ft) (ft/sec) (cfs)10.0 Direct Entry, Storm Sewer Minimum
1
Str #4 Trib Area 2
Surface Ponding @ Str #4
3
Str #2 Trib Area
4
Surface Ponding & Pipe Storage 2 @ Str #2
5
Roof Top Trib Area
6
Storm Tech Trib Area7
Underground StormTech System
Routing Diagram for 17-0001-837 Crown MercedesPrepared by Advanced Civil Design, Printed 6/8/2017
HydroCAD® 10.00-17 s/n 09322 © 2016 HydroCAD Software Solutions LLC
Subcat Reach Pond Link
Type II 24-hr Dublin 001 Rainfall=2.20"17-0001-837 Crown Mercedes Printed 6/8/2017Prepared by Advanced Civil Design
Page 2HydroCAD® 10.00-17 s/n 09322 © 2016 HydroCAD Software Solutions LLC
Summary for Subcatchment 1: Str #4 Trib Area
Runoff = 2.03 cfs @ 12.01 hrs, Volume= 0.113 af, Depth= 1.42"
Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-48.00 hrs, dt= 0.05 hrsType II 24-hr Dublin 001 Rainfall=2.20"
Area (ac) CN Description* 0.631 98 Pavement* 0.329 80 Grass
0.960 92 Weighted Average0.329 34.27% Pervious Area0.631 65.73% Impervious Area
Tc Length Slope Velocity Capacity Description(min) (feet) (ft/ft) (ft/sec) (cfs)10.0 Direct Entry, Storm Sewer Minimum
Subcatchment 1: Str #4 Trib Area
Runoff
Hydrograph
Time (hours)484644424038363432302826242220181614121086420
Flo
w (
cfs)
2
1
0
Type II 24-hrDublin 001 Rainfall=2.20"
Runoff Area=0.960 acRunoff Volume=0.113 af
Runoff Depth=1.42"Tc=10.0 min
CN=92
2.03 cfs
Type II 24-hr Dublin 001 Rainfall=2.20"17-0001-837 Crown Mercedes Printed 6/8/2017Prepared by Advanced Civil Design
Page 3HydroCAD® 10.00-17 s/n 09322 © 2016 HydroCAD Software Solutions LLC
Summary for Pond 2: Surface Ponding @ Str #4
Inflow Area = 0.960 ac, 65.73% Impervious, Inflow Depth = 1.42" for Dublin 001 eventInflow = 2.03 cfs @ 12.01 hrs, Volume= 0.113 afOutflow = 2.02 cfs @ 12.01 hrs, Volume= 0.113 af, Atten= 0%, Lag= 0.1 minPrimary = 2.02 cfs @ 12.01 hrs, Volume= 0.113 afSecondary = 0.00 cfs @ 0.00 hrs, Volume= 0.000 af
Routing by Dyn-Stor-Ind method, Time Span= 0.00-48.00 hrs, dt= 0.05 hrs / 3Peak Elev= 914.68' @ 12.04 hrs Surf.Area= 7 sf Storage= 8 cf
Plug-Flow detention time= 0.2 min calculated for 0.113 af (100% of inflow)Center-of-Mass det. time= 0.2 min ( 812.8 - 812.6 )
Volume Invert Avail.Storage Storage Description#1 917.20' 3,206 cf Surface Ponding (Prismatic) Listed below (Recalc)#2 913.52' 26 cf 3.00'D x 3.70'H Str #5
3,232 cf Total Available Storage
Elevation Surf.Area Inc.Store Cum.Store(feet) (sq-ft) (cubic-feet) (cubic-feet)
917.20 4 0 0918.60 4,576 3,206 3,206
Device Routing Invert Outlet Devices#1 Primary 913.52' 12.0" Round Culvert
L= 55.4' RCP, square edge headwall, Ke= 0.500 Inlet / Outlet Invert= 913.52' / 913.28' S= 0.0043 '/' Cc= 0.900 n= 0.013 Concrete pipe, bends & connections, Flow Area= 0.79 sf
#2 Secondary 918.60' 5.0' long x 1.0' breadth Broad-Crested Rectangular Weir Head (feet) 0.20 0.40 0.60 0.80 1.00 1.20 1.40 1.60 1.80 2.00 2.50 3.00 Coef. (English) 2.69 2.72 2.75 2.85 2.98 3.08 3.20 3.28 3.31 3.30 3.31 3.32
Primary OutFlow Max=1.99 cfs @ 12.01 hrs HW=914.62' TW=914.26' (Dynamic Tailwater)1=Culvert (Outlet Controls 1.99 cfs @ 2.87 fps)
Secondary OutFlow Max=0.00 cfs @ 0.00 hrs HW=913.52' TW=912.94' (Dynamic Tailwater)2=Broad-Crested Rectangular Weir ( Controls 0.00 cfs)
Type II 24-hr Dublin 001 Rainfall=2.20"17-0001-837 Crown Mercedes Printed 6/8/2017Prepared by Advanced Civil Design
Page 4HydroCAD® 10.00-17 s/n 09322 © 2016 HydroCAD Software Solutions LLC
Pond 2: Surface Ponding @ Str #4
InflowOutflowPrimarySecondary
Hydrograph
Time (hours)484644424038363432302826242220181614121086420
Flo
w (
cfs)
2
1
0
Inflow Area=0.960 acPeak Elev=914.68'
Storage=8 cf
2.03 cfs2.02 cfs
2.02 cfs
0.00 cfs
Type II 24-hr Dublin 001 Rainfall=2.20"17-0001-837 Crown Mercedes Printed 6/8/2017Prepared by Advanced Civil Design
Page 5HydroCAD® 10.00-17 s/n 09322 © 2016 HydroCAD Software Solutions LLC
Summary for Subcatchment 3: Str #2 Trib Area
Runoff = 0.79 cfs @ 12.01 hrs, Volume= 0.044 af, Depth= 1.34"
Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-48.00 hrs, dt= 0.05 hrsType II 24-hr Dublin 001 Rainfall=2.20"
Area (ac) CN Description* 0.149 80 Grass* 0.244 98 Pavement
0.393 91 Weighted Average0.149 37.91% Pervious Area0.244 62.09% Impervious Area
Tc Length Slope Velocity Capacity Description(min) (feet) (ft/ft) (ft/sec) (cfs)10.0 Direct Entry, Storm Sewer Minimum
Subcatchment 3: Str #2 Trib Area
Runoff
Hydrograph
Time (hours)484644424038363432302826242220181614121086420
Flo
w (
cfs)
0.85
0.8
0.75
0.7
0.65
0.6
0.55
0.5
0.45
0.4
0.35
0.3
0.25
0.2
0.15
0.1
0.05
0
Type II 24-hrDublin 001 Rainfall=2.20"
Runoff Area=0.393 acRunoff Volume=0.044 af
Runoff Depth=1.34"Tc=10.0 min
CN=91
0.79 cfs
Type II 24-hr Dublin 001 Rainfall=2.20"17-0001-837 Crown Mercedes Printed 6/8/2017Prepared by Advanced Civil Design
Page 6HydroCAD® 10.00-17 s/n 09322 © 2016 HydroCAD Software Solutions LLC
Summary for Pond 4: Surface Ponding & Pipe Storage 2 @ Str #2
Inflow Area = 1.353 ac, 64.67% Impervious, Inflow Depth = 1.40" for Dublin 001 eventInflow = 2.81 cfs @ 12.01 hrs, Volume= 0.157 afOutflow = 2.75 cfs @ 12.03 hrs, Volume= 0.157 af, Atten= 2%, Lag= 0.8 minPrimary = 2.75 cfs @ 12.03 hrs, Volume= 0.157 afSecondary = 0.00 cfs @ 0.00 hrs, Volume= 0.000 af
Routing by Dyn-Stor-Ind method, Time Span= 0.00-48.00 hrs, dt= 0.05 hrs / 3Peak Elev= 914.36' @ 12.04 hrs Surf.Area= 45 sf Storage= 142 cf
Plug-Flow detention time= 1.4 min calculated for 0.157 af (100% of inflow)Center-of-Mass det. time= 1.4 min ( 815.6 - 814.3 )
Volume Invert Avail.Storage Storage Description#1 912.94' 100 cf 3.00'D x 4.73'H Str #2 x 3#2 912.94' 61 cf 12.0" Round Pipe Storage Str #2 - Str #3
L= 77.9' S= 0.0044 '/'#3 913.28' 42 cf 3.00'D x 5.95'H Str #3#4 913.28' 44 cf 12.0" Round Pipe Storage Str #3 - Str #4
L= 55.4' S= 0.0040 '/'#5 917.67' 1,466 cf Str #2 Surface Ponding (Prismatic) Listed below (Recalc)
1,713 cf Total Available Storage
Elevation Surf.Area Inc.Store Cum.Store(feet) (sq-ft) (cubic-feet) (cubic-feet)
917.67 4 0 0918.60 3,148 1,466 1,466
Device Routing Invert Outlet Devices#1 Primary 912.94' 12.0" Round Culvert
L= 55.4' RCP, square edge headwall, Ke= 0.500 Inlet / Outlet Invert= 912.94' / 912.70' S= 0.0043 '/' Cc= 0.900 n= 0.013 Concrete pipe, bends & connections, Flow Area= 0.79 sf
#2 Device 1 912.94' 10.5" Vert. Orifice Plate C= 0.600 #3 Secondary 918.60' 5.0' long x 1.0' breadth Broad-Crested Rectangular Weir
Head (feet) 0.20 0.40 0.60 0.80 1.00 1.20 1.40 1.60 1.80 2.00 2.50 3.00 Coef. (English) 2.69 2.72 2.75 2.85 2.98 3.08 3.20 3.28 3.31 3.30 3.31 3.32
Primary OutFlow Max=2.70 cfs @ 12.03 hrs HW=914.30' TW=913.43' (Dynamic Tailwater)1=Culvert (Passes 2.70 cfs of 2.70 cfs potential flow)
2=Orifice Plate (Orifice Controls 2.70 cfs @ 4.48 fps)
Secondary OutFlow Max=0.00 cfs @ 0.00 hrs HW=912.94' TW=912.20' (Dynamic Tailwater)3=Broad-Crested Rectangular Weir ( Controls 0.00 cfs)
Type II 24-hr Dublin 001 Rainfall=2.20"17-0001-837 Crown Mercedes Printed 6/8/2017Prepared by Advanced Civil Design
Page 7HydroCAD® 10.00-17 s/n 09322 © 2016 HydroCAD Software Solutions LLC
Pond 4: Surface Ponding & Pipe Storage 2 @ Str #2
InflowOutflowPrimarySecondary
Hydrograph
Time (hours)484644424038363432302826242220181614121086420
Flo
w (
cfs)
3
2
1
0
Inflow Area=1.353 acPeak Elev=914.36'
Storage=142 cf
2.81 cfs2.75 cfs
2.75 cfs
0.00 cfs
Type II 24-hr Dublin 001 Rainfall=2.20"17-0001-837 Crown Mercedes Printed 6/8/2017Prepared by Advanced Civil Design
Page 8HydroCAD® 10.00-17 s/n 09322 © 2016 HydroCAD Software Solutions LLC
Summary for Subcatchment 5: Roof Top Trib Area
Runoff = 0.95 cfs @ 11.95 hrs, Volume= 0.050 af, Depth= 1.97"
Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-48.00 hrs, dt= 0.05 hrsType II 24-hr Dublin 001 Rainfall=2.20"
Area (ac) CN Description0.306 98 Roofs, HSG D0.306 100.00% Impervious Area
Tc Length Slope Velocity Capacity Description(min) (feet) (ft/ft) (ft/sec) (cfs)
5.0 Direct Entry,
Subcatchment 5: Roof Top Trib Area
Runoff
Hydrograph
Time (hours)484644424038363432302826242220181614121086420
Flo
w (
cfs)
1
0
Type II 24-hrDublin 001 Rainfall=2.20"
Runoff Area=0.306 acRunoff Volume=0.050 af
Runoff Depth=1.97"Tc=5.0 min
CN=98
0.95 cfs
Type II 24-hr Dublin 001 Rainfall=2.20"17-0001-837 Crown Mercedes Printed 6/8/2017Prepared by Advanced Civil Design
Page 9HydroCAD® 10.00-17 s/n 09322 © 2016 HydroCAD Software Solutions LLC
Summary for Subcatchment 6: Storm Tech Trib Area
Runoff = 0.65 cfs @ 12.01 hrs, Volume= 0.036 af, Depth= 1.34"
Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-48.00 hrs, dt= 0.05 hrsType II 24-hr Dublin 001 Rainfall=2.20"
Area (ac) CN Description* 0.118 80 Grass* 0.205 98 Pavement
0.323 91 Weighted Average0.118 36.53% Pervious Area0.205 63.47% Impervious Area
Tc Length Slope Velocity Capacity Description(min) (feet) (ft/ft) (ft/sec) (cfs)10.0 Direct Entry, Storm Sewer Minimum
Subcatchment 6: Storm Tech Trib Area
Runoff
Hydrograph
Time (hours)484644424038363432302826242220181614121086420
Flo
w (
cfs)
0.7
0.65
0.6
0.55
0.5
0.45
0.4
0.35
0.3
0.25
0.2
0.15
0.1
0.05
0
Type II 24-hrDublin 001 Rainfall=2.20"
Runoff Area=0.323 acRunoff Volume=0.036 af
Runoff Depth=1.34"Tc=10.0 min
CN=91
0.65 cfs
Type II 24-hr Dublin 001 Rainfall=2.20"17-0001-837 Crown Mercedes Printed 6/8/2017Prepared by Advanced Civil Design
Page 10HydroCAD® 10.00-17 s/n 09322 © 2016 HydroCAD Software Solutions LLC
Summary for Pond 7: Underground StormTech System
Inflow Area = 1.982 ac, 69.93% Impervious, Inflow Depth = 1.48" for Dublin 001 eventInflow = 4.10 cfs @ 12.00 hrs, Volume= 0.244 afOutflow = 0.97 cfs @ 12.24 hrs, Volume= 0.231 af, Atten= 76%, Lag= 14.2 minPrimary = 0.97 cfs @ 12.24 hrs, Volume= 0.231 afTertiary = 0.00 cfs @ 0.00 hrs, Volume= 0.000 af
Routing by Dyn-Stor-Ind method, Time Span= 0.00-48.00 hrs, dt= 0.05 hrs / 3Peak Elev= 913.71' @ 12.24 hrs Surf.Area= 5,118 sf Storage= 4,817 cf
Plug-Flow detention time= 200.3 min calculated for 0.231 af (95% of inflow)Center-of-Mass det. time= 171.8 min ( 976.3 - 804.6 )
Volume Invert Avail.Storage Storage Description#1 912.20' 2,830 cf Perimeter Stone (Prismatic) Listed below (Recalc)
9,649 cf Overall - 2,573 cf Embedded = 7,076 cf x 40.0% Voids#2 912.70' 2,573 cf ADS_StormTech SC-740 4 Rows of 14 units x 56 Inside #1
Effective Size= 44.6"W x 30.0"H => 6.45 sf x 7.12'L = 45.9 cfOverall Size= 51.0"W x 30.0"H x 7.56'L with 0.44' Overlap4 Rows of 14 Chambers
#3 912.20' 1,628 cf Perimeter Stone (Prismatic) Listed below (Recalc)5,355 cf Overall - 1,286 cf Embedded = 4,069 cf x 40.0% Voids
#4 912.70' 1,286 cf ADS_StormTech SC-740 1 Row of 14 units x 28 Inside #3Effective Size= 44.6"W x 30.0"H => 6.45 sf x 7.12'L = 45.9 cfOverall Size= 51.0"W x 30.0"H x 7.56'L with 0.44' Overlap2 Rows of 14 Chambers
#5 912.20' 1,109 cf Perimeter Stone - Isolator Row (Prismatic) Listed below (Recalc)3,507 cf Overall - 735 cf Embedded = 2,772 cf x 40.0% Voids
#6 912.70' 735 cf ADS_StormTech SC-740 - Isolator Row x 16 Inside #5Effective Size= 44.6"W x 30.0"H => 6.45 sf x 7.12'L = 45.9 cfOverall Size= 51.0"W x 30.0"H x 7.56'L with 0.44' Overlap
#7 912.20' 962 cf Perimeter Stone - Isolator Row (Prismatic) Listed below (Recalc)3,003 cf Overall - 597 cf Embedded = 2,406 cf x 40.0% Voids
#8 912.70' 597 cf ADS_StormTech SC-740 - Isolator Row x 13 Inside #7Effective Size= 44.6"W x 30.0"H => 6.45 sf x 7.12'L = 45.9 cfOverall Size= 51.0"W x 30.0"H x 7.56'L with 0.44' Overlap
#9 912.70' 44 cf 12.0" Round Pipe Storage Storm Tech - Str #2L= 55.4' S= 0.0044 '/'
11,764 cf Total Available Storage
Elevation Surf.Area Inc.Store Cum.Store(feet) (sq-ft) (cubic-feet) (cubic-feet)
912.20 2,281 0 0916.43 2,281 9,649 9,649
Elevation Surf.Area Inc.Store Cum.Store(feet) (sq-ft) (cubic-feet) (cubic-feet)
912.20 1,266 0 0916.43 1,266 5,355 5,355
Type II 24-hr Dublin 001 Rainfall=2.20"17-0001-837 Crown Mercedes Printed 6/8/2017Prepared by Advanced Civil Design
Page 11HydroCAD® 10.00-17 s/n 09322 © 2016 HydroCAD Software Solutions LLC
Elevation Surf.Area Inc.Store Cum.Store(feet) (sq-ft) (cubic-feet) (cubic-feet)
912.20 829 0 0916.43 829 3,507 3,507
Elevation Surf.Area Inc.Store Cum.Store(feet) (sq-ft) (cubic-feet) (cubic-feet)
912.20 710 0 0916.43 710 3,003 3,003
Device Routing Invert Outlet Devices#1 Primary 912.14' 18.0" Round Culvert
L= 137.9' RCP, square edge headwall, Ke= 0.500 Inlet / Outlet Invert= 912.14' / 911.82' S= 0.0023 '/' Cc= 0.900 n= 0.013 Concrete pipe, bends & connections, Flow Area= 1.77 sf
#2 Device 1 912.20' 0.7" Vert. Underdrain C= 0.600 #3 Device 1 912.70' 6.5" Vert. Orifice C= 0.600 #4 Device 1 915.05' 6.0" W x 7.0" H Vert. Window C= 0.600 #5 Device 1 916.20' 3.0' long Sharp-Crested Rectangular Weir 2 End Contraction(s) #6 Tertiary 916.98' 4.0' long x 1.0' breadth Broad-Crested Rectangular Weir
Head (feet) 0.20 0.40 0.60 0.80 1.00 1.20 1.40 1.60 1.80 2.00 2.50 3.00 Coef. (English) 2.69 2.72 2.75 2.85 2.98 3.08 3.20 3.28 3.31 3.30 3.31 3.32
Primary OutFlow Max=0.97 cfs @ 12.24 hrs HW=913.71' (Free Discharge)1=Culvert (Passes 0.97 cfs of 5.43 cfs potential flow)
2=Underdrain (Orifice Controls 0.02 cfs @ 5.86 fps)3=Orifice (Orifice Controls 0.95 cfs @ 4.14 fps)4=Window ( Controls 0.00 cfs)5=Sharp-Crested Rectangular Weir ( Controls 0.00 cfs)
Tertiary OutFlow Max=0.00 cfs @ 0.00 hrs HW=912.20' (Free Discharge)6=Broad-Crested Rectangular Weir ( Controls 0.00 cfs)
Type II 24-hr Dublin 001 Rainfall=2.20"17-0001-837 Crown Mercedes Printed 6/8/2017Prepared by Advanced Civil Design
Page 12HydroCAD® 10.00-17 s/n 09322 © 2016 HydroCAD Software Solutions LLC
Pond 7: Underground StormTech System
InflowOutflowPrimaryTertiary
Hydrograph
Time (hours)484644424038363432302826242220181614121086420
Flo
w (
cfs)
4
3
2
1
0
Inflow Area=1.982 acPeak Elev=913.71'Storage=4,817 cf
4.10 cfs
0.97 cfs0.97 cfs
0.00 cfs
Type II 24-hr Dublin 002 Rainfall=2.63"17-0001-837 Crown Mercedes Printed 6/8/2017Prepared by Advanced Civil Design
Page 13HydroCAD® 10.00-17 s/n 09322 © 2016 HydroCAD Software Solutions LLC
Summary for Subcatchment 1: Str #4 Trib Area
Runoff = 2.57 cfs @ 12.01 hrs, Volume= 0.145 af, Depth= 1.81"
Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-48.00 hrs, dt= 0.05 hrsType II 24-hr Dublin 002 Rainfall=2.63"
Area (ac) CN Description* 0.631 98 Pavement* 0.329 80 Grass
0.960 92 Weighted Average0.329 34.27% Pervious Area0.631 65.73% Impervious Area
Tc Length Slope Velocity Capacity Description(min) (feet) (ft/ft) (ft/sec) (cfs)10.0 Direct Entry, Storm Sewer Minimum
Subcatchment 1: Str #4 Trib Area
Runoff
Hydrograph
Time (hours)484644424038363432302826242220181614121086420
Flo
w (
cfs)
2
1
0
Type II 24-hrDublin 002 Rainfall=2.63"
Runoff Area=0.960 acRunoff Volume=0.145 af
Runoff Depth=1.81"Tc=10.0 min
CN=92
2.57 cfs
Type II 24-hr Dublin 002 Rainfall=2.63"17-0001-837 Crown Mercedes Printed 6/8/2017Prepared by Advanced Civil Design
Page 14HydroCAD® 10.00-17 s/n 09322 © 2016 HydroCAD Software Solutions LLC
Summary for Pond 2: Surface Ponding @ Str #4
Inflow Area = 0.960 ac, 65.73% Impervious, Inflow Depth = 1.81" for Dublin 002 eventInflow = 2.57 cfs @ 12.01 hrs, Volume= 0.145 afOutflow = 2.53 cfs @ 12.02 hrs, Volume= 0.145 af, Atten= 1%, Lag= 0.4 minPrimary = 2.53 cfs @ 12.02 hrs, Volume= 0.145 afSecondary = 0.00 cfs @ 0.00 hrs, Volume= 0.000 af
Routing by Dyn-Stor-Ind method, Time Span= 0.00-48.00 hrs, dt= 0.05 hrs / 3Peak Elev= 915.71' @ 12.03 hrs Surf.Area= 7 sf Storage= 15 cf
Plug-Flow detention time= 0.2 min calculated for 0.145 af (100% of inflow)Center-of-Mass det. time= 0.2 min ( 805.8 - 805.6 )
Volume Invert Avail.Storage Storage Description#1 917.20' 3,206 cf Surface Ponding (Prismatic) Listed below (Recalc)#2 913.52' 26 cf 3.00'D x 3.70'H Str #5
3,232 cf Total Available Storage
Elevation Surf.Area Inc.Store Cum.Store(feet) (sq-ft) (cubic-feet) (cubic-feet)
917.20 4 0 0918.60 4,576 3,206 3,206
Device Routing Invert Outlet Devices#1 Primary 913.52' 12.0" Round Culvert
L= 55.4' RCP, square edge headwall, Ke= 0.500 Inlet / Outlet Invert= 913.52' / 913.28' S= 0.0043 '/' Cc= 0.900 n= 0.013 Concrete pipe, bends & connections, Flow Area= 0.79 sf
#2 Secondary 918.60' 5.0' long x 1.0' breadth Broad-Crested Rectangular Weir Head (feet) 0.20 0.40 0.60 0.80 1.00 1.20 1.40 1.60 1.80 2.00 2.50 3.00 Coef. (English) 2.69 2.72 2.75 2.85 2.98 3.08 3.20 3.28 3.31 3.30 3.31 3.32
Primary OutFlow Max=2.50 cfs @ 12.02 hrs HW=915.60' TW=915.09' (Dynamic Tailwater)1=Culvert (Outlet Controls 2.50 cfs @ 3.19 fps)
Secondary OutFlow Max=0.00 cfs @ 0.00 hrs HW=913.52' TW=912.94' (Dynamic Tailwater)2=Broad-Crested Rectangular Weir ( Controls 0.00 cfs)
Type II 24-hr Dublin 002 Rainfall=2.63"17-0001-837 Crown Mercedes Printed 6/8/2017Prepared by Advanced Civil Design
Page 15HydroCAD® 10.00-17 s/n 09322 © 2016 HydroCAD Software Solutions LLC
Pond 2: Surface Ponding @ Str #4
InflowOutflowPrimarySecondary
Hydrograph
Time (hours)484644424038363432302826242220181614121086420
Flo
w (
cfs)
2
1
0
Inflow Area=0.960 acPeak Elev=915.71'
Storage=15 cf
2.57 cfs2.53 cfs
2.53 cfs
0.00 cfs
Type II 24-hr Dublin 002 Rainfall=2.63"17-0001-837 Crown Mercedes Printed 6/8/2017Prepared by Advanced Civil Design
Page 16HydroCAD® 10.00-17 s/n 09322 © 2016 HydroCAD Software Solutions LLC
Summary for Subcatchment 3: Str #2 Trib Area
Runoff = 1.01 cfs @ 12.01 hrs, Volume= 0.057 af, Depth= 1.73"
Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-48.00 hrs, dt= 0.05 hrsType II 24-hr Dublin 002 Rainfall=2.63"
Area (ac) CN Description* 0.149 80 Grass* 0.244 98 Pavement
0.393 91 Weighted Average0.149 37.91% Pervious Area0.244 62.09% Impervious Area
Tc Length Slope Velocity Capacity Description(min) (feet) (ft/ft) (ft/sec) (cfs)10.0 Direct Entry, Storm Sewer Minimum
Subcatchment 3: Str #2 Trib Area
Runoff
Hydrograph
Time (hours)484644424038363432302826242220181614121086420
Flo
w (
cfs)
1
0
Type II 24-hrDublin 002 Rainfall=2.63"
Runoff Area=0.393 acRunoff Volume=0.057 af
Runoff Depth=1.73"Tc=10.0 min
CN=91
1.01 cfs
Type II 24-hr Dublin 002 Rainfall=2.63"17-0001-837 Crown Mercedes Printed 6/8/2017Prepared by Advanced Civil Design
Page 17HydroCAD® 10.00-17 s/n 09322 © 2016 HydroCAD Software Solutions LLC
Summary for Pond 4: Surface Ponding & Pipe Storage 2 @ Str #2
Inflow Area = 1.353 ac, 64.67% Impervious, Inflow Depth = 1.79" for Dublin 002 eventInflow = 3.54 cfs @ 12.02 hrs, Volume= 0.202 afOutflow = 3.56 cfs @ 12.02 hrs, Volume= 0.202 af, Atten= 0%, Lag= 0.1 minPrimary = 3.56 cfs @ 12.02 hrs, Volume= 0.202 afSecondary = 0.00 cfs @ 0.00 hrs, Volume= 0.000 af
Routing by Dyn-Stor-Ind method, Time Span= 0.00-48.00 hrs, dt= 0.05 hrs / 3Peak Elev= 915.18' @ 12.03 hrs Surf.Area= 28 sf Storage= 166 cf
Plug-Flow detention time= 1.6 min calculated for 0.202 af (100% of inflow)Center-of-Mass det. time= 1.6 min ( 808.8 - 807.2 )
Volume Invert Avail.Storage Storage Description#1 912.94' 100 cf 3.00'D x 4.73'H Str #2 x 3#2 912.94' 61 cf 12.0" Round Pipe Storage Str #2 - Str #3
L= 77.9' S= 0.0044 '/'#3 913.28' 42 cf 3.00'D x 5.95'H Str #3#4 913.28' 44 cf 12.0" Round Pipe Storage Str #3 - Str #4
L= 55.4' S= 0.0040 '/'#5 917.67' 1,466 cf Str #2 Surface Ponding (Prismatic) Listed below (Recalc)
1,713 cf Total Available Storage
Elevation Surf.Area Inc.Store Cum.Store(feet) (sq-ft) (cubic-feet) (cubic-feet)
917.67 4 0 0918.60 3,148 1,466 1,466
Device Routing Invert Outlet Devices#1 Primary 912.94' 12.0" Round Culvert
L= 55.4' RCP, square edge headwall, Ke= 0.500 Inlet / Outlet Invert= 912.94' / 912.70' S= 0.0043 '/' Cc= 0.900 n= 0.013 Concrete pipe, bends & connections, Flow Area= 0.79 sf
#2 Device 1 912.94' 10.5" Vert. Orifice Plate C= 0.600 #3 Secondary 918.60' 5.0' long x 1.0' breadth Broad-Crested Rectangular Weir
Head (feet) 0.20 0.40 0.60 0.80 1.00 1.20 1.40 1.60 1.80 2.00 2.50 3.00 Coef. (English) 2.69 2.72 2.75 2.85 2.98 3.08 3.20 3.28 3.31 3.30 3.31 3.32
Primary OutFlow Max=3.45 cfs @ 12.02 hrs HW=915.09' TW=913.67' (Dynamic Tailwater)1=Culvert (Passes 3.45 cfs of 4.13 cfs potential flow)
2=Orifice Plate (Orifice Controls 3.45 cfs @ 5.74 fps)
Secondary OutFlow Max=0.00 cfs @ 0.00 hrs HW=912.94' TW=912.20' (Dynamic Tailwater)3=Broad-Crested Rectangular Weir ( Controls 0.00 cfs)
Type II 24-hr Dublin 002 Rainfall=2.63"17-0001-837 Crown Mercedes Printed 6/8/2017Prepared by Advanced Civil Design
Page 18HydroCAD® 10.00-17 s/n 09322 © 2016 HydroCAD Software Solutions LLC
Pond 4: Surface Ponding & Pipe Storage 2 @ Str #2
InflowOutflowPrimarySecondary
Hydrograph
Time (hours)484644424038363432302826242220181614121086420
Flo
w (
cfs)
3
2
1
0
Inflow Area=1.353 acPeak Elev=915.18'
Storage=166 cf
3.54 cfs3.56 cfs
3.56 cfs
0.00 cfs
Type II 24-hr Dublin 002 Rainfall=2.63"17-0001-837 Crown Mercedes Printed 6/8/2017Prepared by Advanced Civil Design
Page 19HydroCAD® 10.00-17 s/n 09322 © 2016 HydroCAD Software Solutions LLC
Summary for Subcatchment 5: Roof Top Trib Area
Runoff = 1.14 cfs @ 11.95 hrs, Volume= 0.061 af, Depth= 2.40"
Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-48.00 hrs, dt= 0.05 hrsType II 24-hr Dublin 002 Rainfall=2.63"
Area (ac) CN Description0.306 98 Roofs, HSG D0.306 100.00% Impervious Area
Tc Length Slope Velocity Capacity Description(min) (feet) (ft/ft) (ft/sec) (cfs)
5.0 Direct Entry,
Subcatchment 5: Roof Top Trib Area
Runoff
Hydrograph
Time (hours)484644424038363432302826242220181614121086420
Flo
w (
cfs)
1
0
Type II 24-hrDublin 002 Rainfall=2.63"
Runoff Area=0.306 acRunoff Volume=0.061 af
Runoff Depth=2.40"Tc=5.0 min
CN=98
1.14 cfs
Type II 24-hr Dublin 002 Rainfall=2.63"17-0001-837 Crown Mercedes Printed 6/8/2017Prepared by Advanced Civil Design
Page 20HydroCAD® 10.00-17 s/n 09322 © 2016 HydroCAD Software Solutions LLC
Summary for Subcatchment 6: Storm Tech Trib Area
Runoff = 0.83 cfs @ 12.01 hrs, Volume= 0.047 af, Depth= 1.73"
Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-48.00 hrs, dt= 0.05 hrsType II 24-hr Dublin 002 Rainfall=2.63"
Area (ac) CN Description* 0.118 80 Grass* 0.205 98 Pavement
0.323 91 Weighted Average0.118 36.53% Pervious Area0.205 63.47% Impervious Area
Tc Length Slope Velocity Capacity Description(min) (feet) (ft/ft) (ft/sec) (cfs)10.0 Direct Entry, Storm Sewer Minimum
Subcatchment 6: Storm Tech Trib Area
Runoff
Hydrograph
Time (hours)484644424038363432302826242220181614121086420
Flo
w (
cfs)
0.9
0.85
0.8
0.75
0.7
0.65
0.6
0.55
0.5
0.45
0.4
0.35
0.3
0.25
0.2
0.15
0.1
0.05
0
Type II 24-hrDublin 002 Rainfall=2.63"
Runoff Area=0.323 acRunoff Volume=0.047 af
Runoff Depth=1.73"Tc=10.0 min
CN=91
0.83 cfs
Type II 24-hr Dublin 002 Rainfall=2.63"17-0001-837 Crown Mercedes Printed 6/8/2017Prepared by Advanced Civil Design
Page 21HydroCAD® 10.00-17 s/n 09322 © 2016 HydroCAD Software Solutions LLC
Summary for Pond 7: Underground StormTech System
Inflow Area = 1.982 ac, 69.93% Impervious, Inflow Depth = 1.87" for Dublin 002 eventInflow = 5.28 cfs @ 12.00 hrs, Volume= 0.309 afOutflow = 1.18 cfs @ 12.24 hrs, Volume= 0.297 af, Atten= 78%, Lag= 14.4 minPrimary = 1.18 cfs @ 12.24 hrs, Volume= 0.297 afTertiary = 0.00 cfs @ 0.00 hrs, Volume= 0.000 af
Routing by Dyn-Stor-Ind method, Time Span= 0.00-48.00 hrs, dt= 0.05 hrs / 3Peak Elev= 914.07' @ 12.24 hrs Surf.Area= 5,086 sf Storage= 6,075 cf
Plug-Flow detention time= 177.2 min calculated for 0.297 af (96% of inflow)Center-of-Mass det. time= 152.5 min ( 951.2 - 798.6 )
Volume Invert Avail.Storage Storage Description#1 912.20' 2,830 cf Perimeter Stone (Prismatic) Listed below (Recalc)
9,649 cf Overall - 2,573 cf Embedded = 7,076 cf x 40.0% Voids#2 912.70' 2,573 cf ADS_StormTech SC-740 4 Rows of 14 units x 56 Inside #1
Effective Size= 44.6"W x 30.0"H => 6.45 sf x 7.12'L = 45.9 cfOverall Size= 51.0"W x 30.0"H x 7.56'L with 0.44' Overlap4 Rows of 14 Chambers
#3 912.20' 1,628 cf Perimeter Stone (Prismatic) Listed below (Recalc)5,355 cf Overall - 1,286 cf Embedded = 4,069 cf x 40.0% Voids
#4 912.70' 1,286 cf ADS_StormTech SC-740 1 Row of 14 units x 28 Inside #3Effective Size= 44.6"W x 30.0"H => 6.45 sf x 7.12'L = 45.9 cfOverall Size= 51.0"W x 30.0"H x 7.56'L with 0.44' Overlap2 Rows of 14 Chambers
#5 912.20' 1,109 cf Perimeter Stone - Isolator Row (Prismatic) Listed below (Recalc)3,507 cf Overall - 735 cf Embedded = 2,772 cf x 40.0% Voids
#6 912.70' 735 cf ADS_StormTech SC-740 - Isolator Row x 16 Inside #5Effective Size= 44.6"W x 30.0"H => 6.45 sf x 7.12'L = 45.9 cfOverall Size= 51.0"W x 30.0"H x 7.56'L with 0.44' Overlap
#7 912.20' 962 cf Perimeter Stone - Isolator Row (Prismatic) Listed below (Recalc)3,003 cf Overall - 597 cf Embedded = 2,406 cf x 40.0% Voids
#8 912.70' 597 cf ADS_StormTech SC-740 - Isolator Row x 13 Inside #7Effective Size= 44.6"W x 30.0"H => 6.45 sf x 7.12'L = 45.9 cfOverall Size= 51.0"W x 30.0"H x 7.56'L with 0.44' Overlap
#9 912.70' 44 cf 12.0" Round Pipe Storage Storm Tech - Str #2L= 55.4' S= 0.0044 '/'
11,764 cf Total Available Storage
Elevation Surf.Area Inc.Store Cum.Store(feet) (sq-ft) (cubic-feet) (cubic-feet)
912.20 2,281 0 0916.43 2,281 9,649 9,649
Elevation Surf.Area Inc.Store Cum.Store(feet) (sq-ft) (cubic-feet) (cubic-feet)
912.20 1,266 0 0916.43 1,266 5,355 5,355
Type II 24-hr Dublin 002 Rainfall=2.63"17-0001-837 Crown Mercedes Printed 6/8/2017Prepared by Advanced Civil Design
Page 22HydroCAD® 10.00-17 s/n 09322 © 2016 HydroCAD Software Solutions LLC
Elevation Surf.Area Inc.Store Cum.Store(feet) (sq-ft) (cubic-feet) (cubic-feet)
912.20 829 0 0916.43 829 3,507 3,507
Elevation Surf.Area Inc.Store Cum.Store(feet) (sq-ft) (cubic-feet) (cubic-feet)
912.20 710 0 0916.43 710 3,003 3,003
Device Routing Invert Outlet Devices#1 Primary 912.14' 18.0" Round Culvert
L= 137.9' RCP, square edge headwall, Ke= 0.500 Inlet / Outlet Invert= 912.14' / 911.82' S= 0.0023 '/' Cc= 0.900 n= 0.013 Concrete pipe, bends & connections, Flow Area= 1.77 sf
#2 Device 1 912.20' 0.7" Vert. Underdrain C= 0.600 #3 Device 1 912.70' 6.5" Vert. Orifice C= 0.600 #4 Device 1 915.05' 6.0" W x 7.0" H Vert. Window C= 0.600 #5 Device 1 916.20' 3.0' long Sharp-Crested Rectangular Weir 2 End Contraction(s) #6 Tertiary 916.98' 4.0' long x 1.0' breadth Broad-Crested Rectangular Weir
Head (feet) 0.20 0.40 0.60 0.80 1.00 1.20 1.40 1.60 1.80 2.00 2.50 3.00 Coef. (English) 2.69 2.72 2.75 2.85 2.98 3.08 3.20 3.28 3.31 3.30 3.31 3.32
Primary OutFlow Max=1.18 cfs @ 12.24 hrs HW=914.07' (Free Discharge)1=Culvert (Passes 1.18 cfs of 6.57 cfs potential flow)
2=Underdrain (Orifice Controls 0.02 cfs @ 6.54 fps)3=Orifice (Orifice Controls 1.16 cfs @ 5.05 fps)4=Window ( Controls 0.00 cfs)5=Sharp-Crested Rectangular Weir ( Controls 0.00 cfs)
Tertiary OutFlow Max=0.00 cfs @ 0.00 hrs HW=912.20' (Free Discharge)6=Broad-Crested Rectangular Weir ( Controls 0.00 cfs)
Type II 24-hr Dublin 002 Rainfall=2.63"17-0001-837 Crown Mercedes Printed 6/8/2017Prepared by Advanced Civil Design
Page 23HydroCAD® 10.00-17 s/n 09322 © 2016 HydroCAD Software Solutions LLC
Pond 7: Underground StormTech System
InflowOutflowPrimaryTertiary
Hydrograph
Time (hours)484644424038363432302826242220181614121086420
Flo
w (
cfs)
5
4
3
2
1
0
Inflow Area=1.982 acPeak Elev=914.07'Storage=6,075 cf
5.28 cfs
1.18 cfs1.18 cfs
0.00 cfs
Type II 24-hr Dublin 005 Rainfall=3.24"17-0001-837 Crown Mercedes Printed 6/8/2017Prepared by Advanced Civil Design
Page 24HydroCAD® 10.00-17 s/n 09322 © 2016 HydroCAD Software Solutions LLC
Summary for Subcatchment 1: Str #4 Trib Area
Runoff = 3.34 cfs @ 12.01 hrs, Volume= 0.191 af, Depth= 2.39"
Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-48.00 hrs, dt= 0.05 hrsType II 24-hr Dublin 005 Rainfall=3.24"
Area (ac) CN Description* 0.631 98 Pavement* 0.329 80 Grass
0.960 92 Weighted Average0.329 34.27% Pervious Area0.631 65.73% Impervious Area
Tc Length Slope Velocity Capacity Description(min) (feet) (ft/ft) (ft/sec) (cfs)10.0 Direct Entry, Storm Sewer Minimum
Subcatchment 1: Str #4 Trib Area
Runoff
Hydrograph
Time (hours)484644424038363432302826242220181614121086420
Flo
w (
cfs)
3
2
1
0
Type II 24-hrDublin 005 Rainfall=3.24"
Runoff Area=0.960 acRunoff Volume=0.191 af
Runoff Depth=2.39"Tc=10.0 min
CN=92
3.34 cfs
Type II 24-hr Dublin 005 Rainfall=3.24"17-0001-837 Crown Mercedes Printed 6/8/2017Prepared by Advanced Civil Design
Page 25HydroCAD® 10.00-17 s/n 09322 © 2016 HydroCAD Software Solutions LLC
Summary for Pond 2: Surface Ponding @ Str #4
Inflow Area = 0.960 ac, 65.73% Impervious, Inflow Depth = 2.39" for Dublin 005 eventInflow = 3.34 cfs @ 12.01 hrs, Volume= 0.191 afOutflow = 3.32 cfs @ 12.01 hrs, Volume= 0.191 af, Atten= 1%, Lag= 0.0 minPrimary = 3.32 cfs @ 12.01 hrs, Volume= 0.191 afSecondary = 0.00 cfs @ 0.00 hrs, Volume= 0.000 af
Routing by Dyn-Stor-Ind method, Time Span= 0.00-48.00 hrs, dt= 0.05 hrs / 3Peak Elev= 917.36' @ 12.03 hrs Surf.Area= 534 sf Storage= 69 cf
Plug-Flow detention time= (not calculated: outflow precedes inflow)Center-of-Mass det. time= 0.2 min ( 798.1 - 797.9 )
Volume Invert Avail.Storage Storage Description#1 917.20' 3,206 cf Surface Ponding (Prismatic) Listed below (Recalc)#2 913.52' 26 cf 3.00'D x 3.70'H Str #5
3,232 cf Total Available Storage
Elevation Surf.Area Inc.Store Cum.Store(feet) (sq-ft) (cubic-feet) (cubic-feet)
917.20 4 0 0918.60 4,576 3,206 3,206
Device Routing Invert Outlet Devices#1 Primary 913.52' 12.0" Round Culvert
L= 55.4' RCP, square edge headwall, Ke= 0.500 Inlet / Outlet Invert= 913.52' / 913.28' S= 0.0043 '/' Cc= 0.900 n= 0.013 Concrete pipe, bends & connections, Flow Area= 0.79 sf
#2 Secondary 918.60' 5.0' long x 1.0' breadth Broad-Crested Rectangular Weir Head (feet) 0.20 0.40 0.60 0.80 1.00 1.20 1.40 1.60 1.80 2.00 2.50 3.00 Coef. (English) 2.69 2.72 2.75 2.85 2.98 3.08 3.20 3.28 3.31 3.30 3.31 3.32
Primary OutFlow Max=3.32 cfs @ 12.01 hrs HW=917.20' TW=916.30' (Dynamic Tailwater)1=Culvert (Outlet Controls 3.32 cfs @ 4.22 fps)
Secondary OutFlow Max=0.00 cfs @ 0.00 hrs HW=913.52' TW=912.94' (Dynamic Tailwater)2=Broad-Crested Rectangular Weir ( Controls 0.00 cfs)
Type II 24-hr Dublin 005 Rainfall=3.24"17-0001-837 Crown Mercedes Printed 6/8/2017Prepared by Advanced Civil Design
Page 26HydroCAD® 10.00-17 s/n 09322 © 2016 HydroCAD Software Solutions LLC
Pond 2: Surface Ponding @ Str #4
InflowOutflowPrimarySecondary
Hydrograph
Time (hours)484644424038363432302826242220181614121086420
Flo
w (
cfs)
3
2
1
0
Inflow Area=0.960 acPeak Elev=917.36'
Storage=69 cf
3.34 cfs3.32 cfs
3.32 cfs
0.00 cfs
Type II 24-hr Dublin 005 Rainfall=3.24"17-0001-837 Crown Mercedes Printed 6/8/2017Prepared by Advanced Civil Design
Page 27HydroCAD® 10.00-17 s/n 09322 © 2016 HydroCAD Software Solutions LLC
Summary for Subcatchment 3: Str #2 Trib Area
Runoff = 1.33 cfs @ 12.01 hrs, Volume= 0.075 af, Depth= 2.30"
Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-48.00 hrs, dt= 0.05 hrsType II 24-hr Dublin 005 Rainfall=3.24"
Area (ac) CN Description* 0.149 80 Grass* 0.244 98 Pavement
0.393 91 Weighted Average0.149 37.91% Pervious Area0.244 62.09% Impervious Area
Tc Length Slope Velocity Capacity Description(min) (feet) (ft/ft) (ft/sec) (cfs)10.0 Direct Entry, Storm Sewer Minimum
Subcatchment 3: Str #2 Trib Area
Runoff
Hydrograph
Time (hours)484644424038363432302826242220181614121086420
Flo
w (
cfs)
1
0
Type II 24-hrDublin 005 Rainfall=3.24"
Runoff Area=0.393 acRunoff Volume=0.075 af
Runoff Depth=2.30"Tc=10.0 min
CN=91
1.33 cfs
Type II 24-hr Dublin 005 Rainfall=3.24"17-0001-837 Crown Mercedes Printed 6/8/2017Prepared by Advanced Civil Design
Page 28HydroCAD® 10.00-17 s/n 09322 © 2016 HydroCAD Software Solutions LLC
Summary for Pond 4: Surface Ponding & Pipe Storage 2 @ Str #2
Inflow Area = 1.353 ac, 64.67% Impervious, Inflow Depth = 2.36" for Dublin 005 eventInflow = 4.64 cfs @ 12.01 hrs, Volume= 0.266 afOutflow = 4.48 cfs @ 12.02 hrs, Volume= 0.266 af, Atten= 3%, Lag= 0.7 minPrimary = 4.48 cfs @ 12.02 hrs, Volume= 0.266 afSecondary = 0.00 cfs @ 0.00 hrs, Volume= 0.000 af
Routing by Dyn-Stor-Ind method, Time Span= 0.00-48.00 hrs, dt= 0.05 hrs / 3Peak Elev= 916.47' @ 12.04 hrs Surf.Area= 28 sf Storage= 202 cf
Plug-Flow detention time= 1.8 min calculated for 0.266 af (100% of inflow)Center-of-Mass det. time= 1.8 min ( 801.2 - 799.4 )
Volume Invert Avail.Storage Storage Description#1 912.94' 100 cf 3.00'D x 4.73'H Str #2 x 3#2 912.94' 61 cf 12.0" Round Pipe Storage Str #2 - Str #3
L= 77.9' S= 0.0044 '/'#3 913.28' 42 cf 3.00'D x 5.95'H Str #3#4 913.28' 44 cf 12.0" Round Pipe Storage Str #3 - Str #4
L= 55.4' S= 0.0040 '/'#5 917.67' 1,466 cf Str #2 Surface Ponding (Prismatic) Listed below (Recalc)
1,713 cf Total Available Storage
Elevation Surf.Area Inc.Store Cum.Store(feet) (sq-ft) (cubic-feet) (cubic-feet)
917.67 4 0 0918.60 3,148 1,466 1,466
Device Routing Invert Outlet Devices#1 Primary 912.94' 12.0" Round Culvert
L= 55.4' RCP, square edge headwall, Ke= 0.500 Inlet / Outlet Invert= 912.94' / 912.70' S= 0.0043 '/' Cc= 0.900 n= 0.013 Concrete pipe, bends & connections, Flow Area= 0.79 sf
#2 Device 1 912.94' 10.5" Vert. Orifice Plate C= 0.600 #3 Secondary 918.60' 5.0' long x 1.0' breadth Broad-Crested Rectangular Weir
Head (feet) 0.20 0.40 0.60 0.80 1.00 1.20 1.40 1.60 1.80 2.00 2.50 3.00 Coef. (English) 2.69 2.72 2.75 2.85 2.98 3.08 3.20 3.28 3.31 3.30 3.31 3.32
Primary OutFlow Max=4.39 cfs @ 12.02 hrs HW=916.34' TW=914.05' (Dynamic Tailwater)1=Culvert (Passes 4.39 cfs of 5.31 cfs potential flow)
2=Orifice Plate (Orifice Controls 4.39 cfs @ 7.30 fps)
Secondary OutFlow Max=0.00 cfs @ 0.00 hrs HW=912.94' TW=912.20' (Dynamic Tailwater)3=Broad-Crested Rectangular Weir ( Controls 0.00 cfs)
Type II 24-hr Dublin 005 Rainfall=3.24"17-0001-837 Crown Mercedes Printed 6/8/2017Prepared by Advanced Civil Design
Page 29HydroCAD® 10.00-17 s/n 09322 © 2016 HydroCAD Software Solutions LLC
Pond 4: Surface Ponding & Pipe Storage 2 @ Str #2
InflowOutflowPrimarySecondary
Hydrograph
Time (hours)484644424038363432302826242220181614121086420
Flo
w (
cfs)
5
4
3
2
1
0
Inflow Area=1.353 acPeak Elev=916.47'
Storage=202 cf
4.64 cfs4.48 cfs
4.48 cfs
0.00 cfs
Type II 24-hr Dublin 005 Rainfall=3.24"17-0001-837 Crown Mercedes Printed 6/8/2017Prepared by Advanced Civil Design
Page 30HydroCAD® 10.00-17 s/n 09322 © 2016 HydroCAD Software Solutions LLC
Summary for Subcatchment 5: Roof Top Trib Area
Runoff = 1.42 cfs @ 11.95 hrs, Volume= 0.077 af, Depth= 3.01"
Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-48.00 hrs, dt= 0.05 hrsType II 24-hr Dublin 005 Rainfall=3.24"
Area (ac) CN Description0.306 98 Roofs, HSG D0.306 100.00% Impervious Area
Tc Length Slope Velocity Capacity Description(min) (feet) (ft/ft) (ft/sec) (cfs)
5.0 Direct Entry,
Subcatchment 5: Roof Top Trib Area
Runoff
Hydrograph
Time (hours)484644424038363432302826242220181614121086420
Flo
w (
cfs)
1
0
Type II 24-hrDublin 005 Rainfall=3.24"
Runoff Area=0.306 acRunoff Volume=0.077 af
Runoff Depth=3.01"Tc=5.0 min
CN=98
1.42 cfs
Type II 24-hr Dublin 005 Rainfall=3.24"17-0001-837 Crown Mercedes Printed 6/8/2017Prepared by Advanced Civil Design
Page 31HydroCAD® 10.00-17 s/n 09322 © 2016 HydroCAD Software Solutions LLC
Summary for Subcatchment 6: Storm Tech Trib Area
Runoff = 1.09 cfs @ 12.01 hrs, Volume= 0.062 af, Depth= 2.30"
Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-48.00 hrs, dt= 0.05 hrsType II 24-hr Dublin 005 Rainfall=3.24"
Area (ac) CN Description* 0.118 80 Grass* 0.205 98 Pavement
0.323 91 Weighted Average0.118 36.53% Pervious Area0.205 63.47% Impervious Area
Tc Length Slope Velocity Capacity Description(min) (feet) (ft/ft) (ft/sec) (cfs)10.0 Direct Entry, Storm Sewer Minimum
Subcatchment 6: Storm Tech Trib Area
Runoff
Hydrograph
Time (hours)484644424038363432302826242220181614121086420
Flo
w (
cfs)
1
0
Type II 24-hrDublin 005 Rainfall=3.24"
Runoff Area=0.323 acRunoff Volume=0.062 af
Runoff Depth=2.30"Tc=10.0 min
CN=91
1.09 cfs
Type II 24-hr Dublin 005 Rainfall=3.24"17-0001-837 Crown Mercedes Printed 6/8/2017Prepared by Advanced Civil Design
Page 32HydroCAD® 10.00-17 s/n 09322 © 2016 HydroCAD Software Solutions LLC
Summary for Pond 7: Underground StormTech System
Inflow Area = 1.982 ac, 69.93% Impervious, Inflow Depth = 2.45" for Dublin 005 eventInflow = 6.69 cfs @ 12.00 hrs, Volume= 0.405 afOutflow = 1.45 cfs @ 12.25 hrs, Volume= 0.392 af, Atten= 78%, Lag= 15.1 minPrimary = 1.45 cfs @ 12.25 hrs, Volume= 0.392 afTertiary = 0.00 cfs @ 0.00 hrs, Volume= 0.000 af
Routing by Dyn-Stor-Ind method, Time Span= 0.00-48.00 hrs, dt= 0.05 hrs / 3Peak Elev= 914.63' @ 12.25 hrs Surf.Area= 5,086 sf Storage= 7,854 cf
Plug-Flow detention time= 155.2 min calculated for 0.391 af (97% of inflow)Center-of-Mass det. time= 137.1 min ( 929.0 - 791.9 )
Volume Invert Avail.Storage Storage Description#1 912.20' 2,830 cf Perimeter Stone (Prismatic) Listed below (Recalc)
9,649 cf Overall - 2,573 cf Embedded = 7,076 cf x 40.0% Voids#2 912.70' 2,573 cf ADS_StormTech SC-740 4 Rows of 14 units x 56 Inside #1
Effective Size= 44.6"W x 30.0"H => 6.45 sf x 7.12'L = 45.9 cfOverall Size= 51.0"W x 30.0"H x 7.56'L with 0.44' Overlap4 Rows of 14 Chambers
#3 912.20' 1,628 cf Perimeter Stone (Prismatic) Listed below (Recalc)5,355 cf Overall - 1,286 cf Embedded = 4,069 cf x 40.0% Voids
#4 912.70' 1,286 cf ADS_StormTech SC-740 1 Row of 14 units x 28 Inside #3Effective Size= 44.6"W x 30.0"H => 6.45 sf x 7.12'L = 45.9 cfOverall Size= 51.0"W x 30.0"H x 7.56'L with 0.44' Overlap2 Rows of 14 Chambers
#5 912.20' 1,109 cf Perimeter Stone - Isolator Row (Prismatic) Listed below (Recalc)3,507 cf Overall - 735 cf Embedded = 2,772 cf x 40.0% Voids
#6 912.70' 735 cf ADS_StormTech SC-740 - Isolator Row x 16 Inside #5Effective Size= 44.6"W x 30.0"H => 6.45 sf x 7.12'L = 45.9 cfOverall Size= 51.0"W x 30.0"H x 7.56'L with 0.44' Overlap
#7 912.20' 962 cf Perimeter Stone - Isolator Row (Prismatic) Listed below (Recalc)3,003 cf Overall - 597 cf Embedded = 2,406 cf x 40.0% Voids
#8 912.70' 597 cf ADS_StormTech SC-740 - Isolator Row x 13 Inside #7Effective Size= 44.6"W x 30.0"H => 6.45 sf x 7.12'L = 45.9 cfOverall Size= 51.0"W x 30.0"H x 7.56'L with 0.44' Overlap
#9 912.70' 44 cf 12.0" Round Pipe Storage Storm Tech - Str #2L= 55.4' S= 0.0044 '/'
11,764 cf Total Available Storage
Elevation Surf.Area Inc.Store Cum.Store(feet) (sq-ft) (cubic-feet) (cubic-feet)
912.20 2,281 0 0916.43 2,281 9,649 9,649
Elevation Surf.Area Inc.Store Cum.Store(feet) (sq-ft) (cubic-feet) (cubic-feet)
912.20 1,266 0 0916.43 1,266 5,355 5,355
Type II 24-hr Dublin 005 Rainfall=3.24"17-0001-837 Crown Mercedes Printed 6/8/2017Prepared by Advanced Civil Design
Page 33HydroCAD® 10.00-17 s/n 09322 © 2016 HydroCAD Software Solutions LLC
Elevation Surf.Area Inc.Store Cum.Store(feet) (sq-ft) (cubic-feet) (cubic-feet)
912.20 829 0 0916.43 829 3,507 3,507
Elevation Surf.Area Inc.Store Cum.Store(feet) (sq-ft) (cubic-feet) (cubic-feet)
912.20 710 0 0916.43 710 3,003 3,003
Device Routing Invert Outlet Devices#1 Primary 912.14' 18.0" Round Culvert
L= 137.9' RCP, square edge headwall, Ke= 0.500 Inlet / Outlet Invert= 912.14' / 911.82' S= 0.0023 '/' Cc= 0.900 n= 0.013 Concrete pipe, bends & connections, Flow Area= 1.77 sf
#2 Device 1 912.20' 0.7" Vert. Underdrain C= 0.600 #3 Device 1 912.70' 6.5" Vert. Orifice C= 0.600 #4 Device 1 915.05' 6.0" W x 7.0" H Vert. Window C= 0.600 #5 Device 1 916.20' 3.0' long Sharp-Crested Rectangular Weir 2 End Contraction(s) #6 Tertiary 916.98' 4.0' long x 1.0' breadth Broad-Crested Rectangular Weir
Head (feet) 0.20 0.40 0.60 0.80 1.00 1.20 1.40 1.60 1.80 2.00 2.50 3.00 Coef. (English) 2.69 2.72 2.75 2.85 2.98 3.08 3.20 3.28 3.31 3.30 3.31 3.32
Primary OutFlow Max=1.45 cfs @ 12.25 hrs HW=914.63' (Free Discharge)1=Culvert (Passes 1.45 cfs of 8.10 cfs potential flow)
2=Underdrain (Orifice Controls 0.02 cfs @ 7.46 fps)3=Orifice (Orifice Controls 1.43 cfs @ 6.21 fps)4=Window ( Controls 0.00 cfs)5=Sharp-Crested Rectangular Weir ( Controls 0.00 cfs)
Tertiary OutFlow Max=0.00 cfs @ 0.00 hrs HW=912.20' (Free Discharge)6=Broad-Crested Rectangular Weir ( Controls 0.00 cfs)
Type II 24-hr Dublin 005 Rainfall=3.24"17-0001-837 Crown Mercedes Printed 6/8/2017Prepared by Advanced Civil Design
Page 34HydroCAD® 10.00-17 s/n 09322 © 2016 HydroCAD Software Solutions LLC
Pond 7: Underground StormTech System
InflowOutflowPrimaryTertiary
Hydrograph
Time (hours)484644424038363432302826242220181614121086420
Flo
w (
cfs)
7
6
5
4
3
2
1
0
Inflow Area=1.982 acPeak Elev=914.63'Storage=7,854 cf
6.69 cfs
1.45 cfs1.45 cfs
0.00 cfs
Type II 24-hr Dublin 010 Rainfall=3.74"17-0001-837 Crown Mercedes Printed 6/8/2017Prepared by Advanced Civil Design
Page 35HydroCAD® 10.00-17 s/n 09322 © 2016 HydroCAD Software Solutions LLC
Summary for Subcatchment 1: Str #4 Trib Area
Runoff = 3.97 cfs @ 12.01 hrs, Volume= 0.229 af, Depth= 2.87"
Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-48.00 hrs, dt= 0.05 hrsType II 24-hr Dublin 010 Rainfall=3.74"
Area (ac) CN Description* 0.631 98 Pavement* 0.329 80 Grass
0.960 92 Weighted Average0.329 34.27% Pervious Area0.631 65.73% Impervious Area
Tc Length Slope Velocity Capacity Description(min) (feet) (ft/ft) (ft/sec) (cfs)10.0 Direct Entry, Storm Sewer Minimum
Subcatchment 1: Str #4 Trib Area
Runoff
Hydrograph
Time (hours)484644424038363432302826242220181614121086420
Flo
w (
cfs)
4
3
2
1
0
Type II 24-hrDublin 010 Rainfall=3.74"
Runoff Area=0.960 acRunoff Volume=0.229 af
Runoff Depth=2.87"Tc=10.0 min
CN=92
3.97 cfs
Type II 24-hr Dublin 010 Rainfall=3.74"17-0001-837 Crown Mercedes Printed 6/8/2017Prepared by Advanced Civil Design
Page 36HydroCAD® 10.00-17 s/n 09322 © 2016 HydroCAD Software Solutions LLC
Summary for Pond 2: Surface Ponding @ Str #4
Inflow Area = 0.960 ac, 65.73% Impervious, Inflow Depth = 2.87" for Dublin 010 eventInflow = 3.97 cfs @ 12.01 hrs, Volume= 0.229 afOutflow = 5.16 cfs @ 12.17 hrs, Volume= 0.229 af, Atten= 0%, Lag= 9.4 minPrimary = 5.16 cfs @ 12.17 hrs, Volume= 0.246 afSecondary = 0.00 cfs @ 0.00 hrs, Volume= 0.000 af
Routing by Dyn-Stor-Ind method, Time Span= 0.00-48.00 hrs, dt= 0.05 hrs / 3Peak Elev= 917.96' @ 12.12 hrs Surf.Area= 2,497 sf Storage= 975 cf
Plug-Flow detention time= (not calculated: outflow precedes inflow)Center-of-Mass det. time= 0.9 min ( 793.7 - 792.8 )
Volume Invert Avail.Storage Storage Description#1 917.20' 3,206 cf Surface Ponding (Prismatic) Listed below (Recalc)#2 913.52' 26 cf 3.00'D x 3.70'H Str #5
3,232 cf Total Available Storage
Elevation Surf.Area Inc.Store Cum.Store(feet) (sq-ft) (cubic-feet) (cubic-feet)
917.20 4 0 0918.60 4,576 3,206 3,206
Device Routing Invert Outlet Devices#1 Primary 913.52' 12.0" Round Culvert
L= 55.4' RCP, square edge headwall, Ke= 0.500 Inlet / Outlet Invert= 913.52' / 913.28' S= 0.0043 '/' Cc= 0.900 n= 0.013 Concrete pipe, bends & connections, Flow Area= 0.79 sf
#2 Secondary 918.60' 5.0' long x 1.0' breadth Broad-Crested Rectangular Weir Head (feet) 0.20 0.40 0.60 0.80 1.00 1.20 1.40 1.60 1.80 2.00 2.50 3.00 Coef. (English) 2.69 2.72 2.75 2.85 2.98 3.08 3.20 3.28 3.31 3.30 3.31 3.32
Primary OutFlow Max=2.70 cfs @ 12.17 hrs HW=917.81' TW=917.22' (Dynamic Tailwater)1=Culvert (Outlet Controls 2.70 cfs @ 3.44 fps)
Secondary OutFlow Max=0.00 cfs @ 0.00 hrs HW=913.52' TW=912.94' (Dynamic Tailwater)2=Broad-Crested Rectangular Weir ( Controls 0.00 cfs)
Type II 24-hr Dublin 010 Rainfall=3.74"17-0001-837 Crown Mercedes Printed 6/8/2017Prepared by Advanced Civil Design
Page 37HydroCAD® 10.00-17 s/n 09322 © 2016 HydroCAD Software Solutions LLC
Pond 2: Surface Ponding @ Str #4
InflowOutflowPrimarySecondary
Hydrograph
Time (hours)484644424038363432302826242220181614121086420
Flo
w (
cfs)
5
4
3
2
1
0
Inflow Area=0.960 acPeak Elev=917.96'
Storage=975 cf3.97 cfs
5.16 cfs5.16 cfs
0.00 cfs
Type II 24-hr Dublin 010 Rainfall=3.74"17-0001-837 Crown Mercedes Printed 6/8/2017Prepared by Advanced Civil Design
Page 38HydroCAD® 10.00-17 s/n 09322 © 2016 HydroCAD Software Solutions LLC
Summary for Subcatchment 3: Str #2 Trib Area
Runoff = 1.58 cfs @ 12.01 hrs, Volume= 0.091 af, Depth= 2.77"
Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-48.00 hrs, dt= 0.05 hrsType II 24-hr Dublin 010 Rainfall=3.74"
Area (ac) CN Description* 0.149 80 Grass* 0.244 98 Pavement
0.393 91 Weighted Average0.149 37.91% Pervious Area0.244 62.09% Impervious Area
Tc Length Slope Velocity Capacity Description(min) (feet) (ft/ft) (ft/sec) (cfs)10.0 Direct Entry, Storm Sewer Minimum
Subcatchment 3: Str #2 Trib Area
Runoff
Hydrograph
Time (hours)484644424038363432302826242220181614121086420
Flo
w (
cfs) 1
0
Type II 24-hrDublin 010 Rainfall=3.74"
Runoff Area=0.393 acRunoff Volume=0.091 af
Runoff Depth=2.77"Tc=10.0 min
CN=91
1.58 cfs
Type II 24-hr Dublin 010 Rainfall=3.74"17-0001-837 Crown Mercedes Printed 6/8/2017Prepared by Advanced Civil Design
Page 39HydroCAD® 10.00-17 s/n 09322 © 2016 HydroCAD Software Solutions LLC
Summary for Pond 4: Surface Ponding & Pipe Storage 2 @ Str #2
Inflow Area = 1.353 ac, 64.67% Impervious, Inflow Depth = 2.98" for Dublin 010 eventInflow = 5.55 cfs @ 12.15 hrs, Volume= 0.336 afOutflow = 5.35 cfs @ 12.02 hrs, Volume= 0.336 af, Atten= 4%, Lag= 0.0 minPrimary = 5.35 cfs @ 12.02 hrs, Volume= 0.336 afSecondary = 0.00 cfs @ 0.00 hrs, Volume= 0.000 af
Routing by Dyn-Stor-Ind method, Time Span= 0.00-48.00 hrs, dt= 0.05 hrs / 3Peak Elev= 917.90' @ 12.19 hrs Surf.Area= 823 sf Storage= 331 cf
Plug-Flow detention time= 1.9 min calculated for 0.336 af (100% of inflow)Center-of-Mass det. time= 1.9 min ( 793.2 - 791.3 )
Volume Invert Avail.Storage Storage Description#1 912.94' 100 cf 3.00'D x 4.73'H Str #2 x 3#2 912.94' 61 cf 12.0" Round Pipe Storage Str #2 - Str #3
L= 77.9' S= 0.0044 '/'#3 913.28' 42 cf 3.00'D x 5.95'H Str #3#4 913.28' 44 cf 12.0" Round Pipe Storage Str #3 - Str #4
L= 55.4' S= 0.0040 '/'#5 917.67' 1,466 cf Str #2 Surface Ponding (Prismatic) Listed below (Recalc)
1,713 cf Total Available Storage
Elevation Surf.Area Inc.Store Cum.Store(feet) (sq-ft) (cubic-feet) (cubic-feet)
917.67 4 0 0918.60 3,148 1,466 1,466
Device Routing Invert Outlet Devices#1 Primary 912.94' 12.0" Round Culvert
L= 55.4' RCP, square edge headwall, Ke= 0.500 Inlet / Outlet Invert= 912.94' / 912.70' S= 0.0043 '/' Cc= 0.900 n= 0.013 Concrete pipe, bends & connections, Flow Area= 0.79 sf
#2 Device 1 912.94' 10.5" Vert. Orifice Plate C= 0.600 #3 Secondary 918.60' 5.0' long x 1.0' breadth Broad-Crested Rectangular Weir
Head (feet) 0.20 0.40 0.60 0.80 1.00 1.20 1.40 1.60 1.80 2.00 2.50 3.00 Coef. (English) 2.69 2.72 2.75 2.85 2.98 3.08 3.20 3.28 3.31 3.30 3.31 3.32
Primary OutFlow Max=5.22 cfs @ 12.02 hrs HW=917.62' TW=914.38' (Dynamic Tailwater)1=Culvert (Passes 5.22 cfs of 6.31 cfs potential flow)
2=Orifice Plate (Orifice Controls 5.22 cfs @ 8.67 fps)
Secondary OutFlow Max=0.00 cfs @ 0.00 hrs HW=912.94' TW=912.20' (Dynamic Tailwater)3=Broad-Crested Rectangular Weir ( Controls 0.00 cfs)
Type II 24-hr Dublin 010 Rainfall=3.74"17-0001-837 Crown Mercedes Printed 6/8/2017Prepared by Advanced Civil Design
Page 40HydroCAD® 10.00-17 s/n 09322 © 2016 HydroCAD Software Solutions LLC
Pond 4: Surface Ponding & Pipe Storage 2 @ Str #2
InflowOutflowPrimarySecondary
Hydrograph
Time (hours)484644424038363432302826242220181614121086420
Flo
w (
cfs)
6
5
4
3
2
1
0
Inflow Area=1.353 acPeak Elev=917.90'
Storage=331 cf
5.55 cfs
5.35 cfs5.35 cfs
0.00 cfs
Type II 24-hr Dublin 010 Rainfall=3.74"17-0001-837 Crown Mercedes Printed 6/8/2017Prepared by Advanced Civil Design
Page 41HydroCAD® 10.00-17 s/n 09322 © 2016 HydroCAD Software Solutions LLC
Summary for Subcatchment 5: Roof Top Trib Area
Runoff = 1.64 cfs @ 11.95 hrs, Volume= 0.089 af, Depth= 3.51"
Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-48.00 hrs, dt= 0.05 hrsType II 24-hr Dublin 010 Rainfall=3.74"
Area (ac) CN Description0.306 98 Roofs, HSG D0.306 100.00% Impervious Area
Tc Length Slope Velocity Capacity Description(min) (feet) (ft/ft) (ft/sec) (cfs)
5.0 Direct Entry,
Subcatchment 5: Roof Top Trib Area
Runoff
Hydrograph
Time (hours)484644424038363432302826242220181614121086420
Flo
w (
cfs)
1
0
Type II 24-hrDublin 010 Rainfall=3.74"
Runoff Area=0.306 acRunoff Volume=0.089 af
Runoff Depth=3.51"Tc=5.0 min
CN=98
1.64 cfs
Type II 24-hr Dublin 010 Rainfall=3.74"17-0001-837 Crown Mercedes Printed 6/8/2017Prepared by Advanced Civil Design
Page 42HydroCAD® 10.00-17 s/n 09322 © 2016 HydroCAD Software Solutions LLC
Summary for Subcatchment 6: Storm Tech Trib Area
Runoff = 1.30 cfs @ 12.01 hrs, Volume= 0.075 af, Depth= 2.77"
Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-48.00 hrs, dt= 0.05 hrsType II 24-hr Dublin 010 Rainfall=3.74"
Area (ac) CN Description* 0.118 80 Grass* 0.205 98 Pavement
0.323 91 Weighted Average0.118 36.53% Pervious Area0.205 63.47% Impervious Area
Tc Length Slope Velocity Capacity Description(min) (feet) (ft/ft) (ft/sec) (cfs)10.0 Direct Entry, Storm Sewer Minimum
Subcatchment 6: Storm Tech Trib Area
Runoff
Hydrograph
Time (hours)484644424038363432302826242220181614121086420
Flo
w (
cfs)
1
0
Type II 24-hrDublin 010 Rainfall=3.74"
Runoff Area=0.323 acRunoff Volume=0.075 af
Runoff Depth=2.77"Tc=10.0 min
CN=91
1.30 cfs
Type II 24-hr Dublin 010 Rainfall=3.74"17-0001-837 Crown Mercedes Printed 6/8/2017Prepared by Advanced Civil Design
Page 43HydroCAD® 10.00-17 s/n 09322 © 2016 HydroCAD Software Solutions LLC
Summary for Pond 7: Underground StormTech System
Inflow Area = 1.982 ac, 69.93% Impervious, Inflow Depth = 3.03" for Dublin 010 eventInflow = 7.92 cfs @ 12.00 hrs, Volume= 0.500 afOutflow = 2.27 cfs @ 12.26 hrs, Volume= 0.487 af, Atten= 71%, Lag= 15.8 minPrimary = 2.27 cfs @ 12.26 hrs, Volume= 0.487 afTertiary = 0.00 cfs @ 0.00 hrs, Volume= 0.000 af
Routing by Dyn-Stor-Ind method, Time Span= 0.00-48.00 hrs, dt= 0.05 hrs / 3Peak Elev= 915.50' @ 12.26 hrs Surf.Area= 5,086 sf Storage= 9,873 cf
Plug-Flow detention time= 141.2 min calculated for 0.486 af (97% of inflow)Center-of-Mass det. time= 126.4 min ( 912.1 - 785.8 )
Volume Invert Avail.Storage Storage Description#1 912.20' 2,830 cf Perimeter Stone (Prismatic) Listed below (Recalc)
9,649 cf Overall - 2,573 cf Embedded = 7,076 cf x 40.0% Voids#2 912.70' 2,573 cf ADS_StormTech SC-740 4 Rows of 14 units x 56 Inside #1
Effective Size= 44.6"W x 30.0"H => 6.45 sf x 7.12'L = 45.9 cfOverall Size= 51.0"W x 30.0"H x 7.56'L with 0.44' Overlap4 Rows of 14 Chambers
#3 912.20' 1,628 cf Perimeter Stone (Prismatic) Listed below (Recalc)5,355 cf Overall - 1,286 cf Embedded = 4,069 cf x 40.0% Voids
#4 912.70' 1,286 cf ADS_StormTech SC-740 1 Row of 14 units x 28 Inside #3Effective Size= 44.6"W x 30.0"H => 6.45 sf x 7.12'L = 45.9 cfOverall Size= 51.0"W x 30.0"H x 7.56'L with 0.44' Overlap2 Rows of 14 Chambers
#5 912.20' 1,109 cf Perimeter Stone - Isolator Row (Prismatic) Listed below (Recalc)3,507 cf Overall - 735 cf Embedded = 2,772 cf x 40.0% Voids
#6 912.70' 735 cf ADS_StormTech SC-740 - Isolator Row x 16 Inside #5Effective Size= 44.6"W x 30.0"H => 6.45 sf x 7.12'L = 45.9 cfOverall Size= 51.0"W x 30.0"H x 7.56'L with 0.44' Overlap
#7 912.20' 962 cf Perimeter Stone - Isolator Row (Prismatic) Listed below (Recalc)3,003 cf Overall - 597 cf Embedded = 2,406 cf x 40.0% Voids
#8 912.70' 597 cf ADS_StormTech SC-740 - Isolator Row x 13 Inside #7Effective Size= 44.6"W x 30.0"H => 6.45 sf x 7.12'L = 45.9 cfOverall Size= 51.0"W x 30.0"H x 7.56'L with 0.44' Overlap
#9 912.70' 44 cf 12.0" Round Pipe Storage Storm Tech - Str #2L= 55.4' S= 0.0044 '/'
11,764 cf Total Available Storage
Elevation Surf.Area Inc.Store Cum.Store(feet) (sq-ft) (cubic-feet) (cubic-feet)
912.20 2,281 0 0916.43 2,281 9,649 9,649
Elevation Surf.Area Inc.Store Cum.Store(feet) (sq-ft) (cubic-feet) (cubic-feet)
912.20 1,266 0 0916.43 1,266 5,355 5,355
Type II 24-hr Dublin 010 Rainfall=3.74"17-0001-837 Crown Mercedes Printed 6/8/2017Prepared by Advanced Civil Design
Page 44HydroCAD® 10.00-17 s/n 09322 © 2016 HydroCAD Software Solutions LLC
Elevation Surf.Area Inc.Store Cum.Store(feet) (sq-ft) (cubic-feet) (cubic-feet)
912.20 829 0 0916.43 829 3,507 3,507
Elevation Surf.Area Inc.Store Cum.Store(feet) (sq-ft) (cubic-feet) (cubic-feet)
912.20 710 0 0916.43 710 3,003 3,003
Device Routing Invert Outlet Devices#1 Primary 912.14' 18.0" Round Culvert
L= 137.9' RCP, square edge headwall, Ke= 0.500 Inlet / Outlet Invert= 912.14' / 911.82' S= 0.0023 '/' Cc= 0.900 n= 0.013 Concrete pipe, bends & connections, Flow Area= 1.77 sf
#2 Device 1 912.20' 0.7" Vert. Underdrain C= 0.600 #3 Device 1 912.70' 6.5" Vert. Orifice C= 0.600 #4 Device 1 915.05' 6.0" W x 7.0" H Vert. Window C= 0.600 #5 Device 1 916.20' 3.0' long Sharp-Crested Rectangular Weir 2 End Contraction(s) #6 Tertiary 916.98' 4.0' long x 1.0' breadth Broad-Crested Rectangular Weir
Head (feet) 0.20 0.40 0.60 0.80 1.00 1.20 1.40 1.60 1.80 2.00 2.50 3.00 Coef. (English) 2.69 2.72 2.75 2.85 2.98 3.08 3.20 3.28 3.31 3.30 3.31 3.32
Primary OutFlow Max=2.23 cfs @ 12.26 hrs HW=915.48' (Free Discharge)1=Culvert (Passes 2.23 cfs of 10.39 cfs potential flow)
2=Underdrain (Orifice Controls 0.02 cfs @ 8.68 fps)3=Orifice (Orifice Controls 1.76 cfs @ 7.62 fps)4=Window (Orifice Controls 0.45 cfs @ 2.10 fps)5=Sharp-Crested Rectangular Weir ( Controls 0.00 cfs)
Tertiary OutFlow Max=0.00 cfs @ 0.00 hrs HW=912.20' (Free Discharge)6=Broad-Crested Rectangular Weir ( Controls 0.00 cfs)
Type II 24-hr Dublin 010 Rainfall=3.74"17-0001-837 Crown Mercedes Printed 6/8/2017Prepared by Advanced Civil Design
Page 45HydroCAD® 10.00-17 s/n 09322 © 2016 HydroCAD Software Solutions LLC
Pond 7: Underground StormTech System
InflowOutflowPrimaryTertiary
Hydrograph
Time (hours)484644424038363432302826242220181614121086420
Flo
w (
cfs)
8
7
6
5
4
3
2
1
0
Inflow Area=1.982 acPeak Elev=915.50'Storage=9,873 cf
7.92 cfs
2.27 cfs2.27 cfs
0.00 cfs
Type II 24-hr Dublin 025 Rainfall=4.44"17-0001-837 Crown Mercedes Printed 6/8/2017Prepared by Advanced Civil Design
Page 46HydroCAD® 10.00-17 s/n 09322 © 2016 HydroCAD Software Solutions LLC
Summary for Subcatchment 1: Str #4 Trib Area
Runoff = 4.85 cfs @ 12.01 hrs, Volume= 0.284 af, Depth= 3.54"
Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-48.00 hrs, dt= 0.05 hrsType II 24-hr Dublin 025 Rainfall=4.44"
Area (ac) CN Description* 0.631 98 Pavement* 0.329 80 Grass
0.960 92 Weighted Average0.329 34.27% Pervious Area0.631 65.73% Impervious Area
Tc Length Slope Velocity Capacity Description(min) (feet) (ft/ft) (ft/sec) (cfs)10.0 Direct Entry, Storm Sewer Minimum
Subcatchment 1: Str #4 Trib Area
Runoff
Hydrograph
Time (hours)484644424038363432302826242220181614121086420
Flo
w (
cfs)
5
4
3
2
1
0
Type II 24-hrDublin 025 Rainfall=4.44"
Runoff Area=0.960 acRunoff Volume=0.284 af
Runoff Depth=3.54"Tc=10.0 min
CN=92
4.85 cfs
Type II 24-hr Dublin 025 Rainfall=4.44"17-0001-837 Crown Mercedes Printed 6/8/2017Prepared by Advanced Civil Design
Page 47HydroCAD® 10.00-17 s/n 09322 © 2016 HydroCAD Software Solutions LLC
Summary for Pond 2: Surface Ponding @ Str #4
Inflow Area = 0.960 ac, 65.73% Impervious, Inflow Depth = 3.54" for Dublin 025 eventInflow = 4.85 cfs @ 12.01 hrs, Volume= 0.284 afOutflow = 4.35 cfs @ 11.94 hrs, Volume= 0.286 af, Atten= 10%, Lag= 0.0 minPrimary = 4.58 cfs @ 11.98 hrs, Volume= 0.375 afSecondary = 0.00 cfs @ 0.00 hrs, Volume= 0.000 af
Routing by Dyn-Stor-Ind method, Time Span= 0.00-48.00 hrs, dt= 0.05 hrs / 3Peak Elev= 918.18' @ 12.12 hrs Surf.Area= 3,220 sf Storage= 1,606 cf
Plug-Flow detention time= (not calculated: outflow precedes inflow)Center-of-Mass det. time= 2.8 min ( 789.8 - 786.9 )
Volume Invert Avail.Storage Storage Description#1 917.20' 3,206 cf Surface Ponding (Prismatic) Listed below (Recalc)#2 913.52' 26 cf 3.00'D x 3.70'H Str #5
3,232 cf Total Available Storage
Elevation Surf.Area Inc.Store Cum.Store(feet) (sq-ft) (cubic-feet) (cubic-feet)
917.20 4 0 0918.60 4,576 3,206 3,206
Device Routing Invert Outlet Devices#1 Primary 913.52' 12.0" Round Culvert
L= 55.4' RCP, square edge headwall, Ke= 0.500 Inlet / Outlet Invert= 913.52' / 913.28' S= 0.0043 '/' Cc= 0.900 n= 0.013 Concrete pipe, bends & connections, Flow Area= 0.79 sf
#2 Secondary 918.60' 5.0' long x 1.0' breadth Broad-Crested Rectangular Weir Head (feet) 0.20 0.40 0.60 0.80 1.00 1.20 1.40 1.60 1.80 2.00 2.50 3.00 Coef. (English) 2.69 2.72 2.75 2.85 2.98 3.08 3.20 3.28 3.31 3.30 3.31 3.32
Primary OutFlow Max=0.00 cfs @ 11.98 hrs HW=917.38' TW=917.77' (Dynamic Tailwater)1=Culvert ( Controls 0.00 cfs)
Secondary OutFlow Max=0.00 cfs @ 0.00 hrs HW=913.52' TW=912.94' (Dynamic Tailwater)2=Broad-Crested Rectangular Weir ( Controls 0.00 cfs)
Type II 24-hr Dublin 025 Rainfall=4.44"17-0001-837 Crown Mercedes Printed 6/8/2017Prepared by Advanced Civil Design
Page 48HydroCAD® 10.00-17 s/n 09322 © 2016 HydroCAD Software Solutions LLC
Pond 2: Surface Ponding @ Str #4
InflowOutflowPrimarySecondary
Hydrograph
Time (hours)484644424038363432302826242220181614121086420
Flo
w (
cfs)
5
4
3
2
1
0
Inflow Area=0.960 acPeak Elev=918.18'
Storage=1,606 cf
4.85 cfs
4.35 cfs4.58 cfs
0.00 cfs
Type II 24-hr Dublin 025 Rainfall=4.44"17-0001-837 Crown Mercedes Printed 6/8/2017Prepared by Advanced Civil Design
Page 49HydroCAD® 10.00-17 s/n 09322 © 2016 HydroCAD Software Solutions LLC
Summary for Subcatchment 3: Str #2 Trib Area
Runoff = 1.94 cfs @ 12.01 hrs, Volume= 0.113 af, Depth= 3.44"
Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-48.00 hrs, dt= 0.05 hrsType II 24-hr Dublin 025 Rainfall=4.44"
Area (ac) CN Description* 0.149 80 Grass* 0.244 98 Pavement
0.393 91 Weighted Average0.149 37.91% Pervious Area0.244 62.09% Impervious Area
Tc Length Slope Velocity Capacity Description(min) (feet) (ft/ft) (ft/sec) (cfs)10.0 Direct Entry, Storm Sewer Minimum
Subcatchment 3: Str #2 Trib Area
Runoff
Hydrograph
Time (hours)484644424038363432302826242220181614121086420
Flo
w (
cfs)
2
1
0
Type II 24-hrDublin 025 Rainfall=4.44"
Runoff Area=0.393 acRunoff Volume=0.113 af
Runoff Depth=3.44"Tc=10.0 min
CN=91
1.94 cfs
Type II 24-hr Dublin 025 Rainfall=4.44"17-0001-837 Crown Mercedes Printed 6/8/2017Prepared by Advanced Civil Design
Page 50HydroCAD® 10.00-17 s/n 09322 © 2016 HydroCAD Software Solutions LLC
Summary for Pond 4: Surface Ponding & Pipe Storage 2 @ Str #2
Inflow Area = 1.353 ac, 64.67% Impervious, Inflow Depth = 4.33" for Dublin 025 eventInflow = 6.44 cfs @ 11.98 hrs, Volume= 0.488 afOutflow = 5.51 cfs @ 11.97 hrs, Volume= 0.488 af, Atten= 14%, Lag= 0.0 minPrimary = 5.51 cfs @ 11.97 hrs, Volume= 0.488 afSecondary = 0.00 cfs @ 0.00 hrs, Volume= 0.000 af
Routing by Dyn-Stor-Ind method, Time Span= 0.00-48.00 hrs, dt= 0.05 hrs / 3Peak Elev= 917.94' @ 12.50 hrs Surf.Area= 942 sf Storage= 361 cf
Plug-Flow detention time= 2.5 min calculated for 0.488 af (100% of inflow)Center-of-Mass det. time= 1.8 min ( 783.2 - 781.4 )
Volume Invert Avail.Storage Storage Description#1 912.94' 100 cf 3.00'D x 4.73'H Str #2 x 3#2 912.94' 61 cf 12.0" Round Pipe Storage Str #2 - Str #3
L= 77.9' S= 0.0044 '/'#3 913.28' 42 cf 3.00'D x 5.95'H Str #3#4 913.28' 44 cf 12.0" Round Pipe Storage Str #3 - Str #4
L= 55.4' S= 0.0040 '/'#5 917.67' 1,466 cf Str #2 Surface Ponding (Prismatic) Listed below (Recalc)
1,713 cf Total Available Storage
Elevation Surf.Area Inc.Store Cum.Store(feet) (sq-ft) (cubic-feet) (cubic-feet)
917.67 4 0 0918.60 3,148 1,466 1,466
Device Routing Invert Outlet Devices#1 Primary 912.94' 12.0" Round Culvert
L= 55.4' RCP, square edge headwall, Ke= 0.500 Inlet / Outlet Invert= 912.94' / 912.70' S= 0.0043 '/' Cc= 0.900 n= 0.013 Concrete pipe, bends & connections, Flow Area= 0.79 sf
#2 Device 1 912.94' 10.5" Vert. Orifice Plate C= 0.600 #3 Secondary 918.60' 5.0' long x 1.0' breadth Broad-Crested Rectangular Weir
Head (feet) 0.20 0.40 0.60 0.80 1.00 1.20 1.40 1.60 1.80 2.00 2.50 3.00 Coef. (English) 2.69 2.72 2.75 2.85 2.98 3.08 3.20 3.28 3.31 3.30 3.31 3.32
Primary OutFlow Max=5.31 cfs @ 11.97 hrs HW=917.74' TW=914.38' (Dynamic Tailwater)1=Culvert (Passes 5.31 cfs of 6.42 cfs potential flow)
2=Orifice Plate (Orifice Controls 5.31 cfs @ 8.83 fps)
Secondary OutFlow Max=0.00 cfs @ 0.00 hrs HW=912.94' TW=912.20' (Dynamic Tailwater)3=Broad-Crested Rectangular Weir ( Controls 0.00 cfs)
Type II 24-hr Dublin 025 Rainfall=4.44"17-0001-837 Crown Mercedes Printed 6/8/2017Prepared by Advanced Civil Design
Page 51HydroCAD® 10.00-17 s/n 09322 © 2016 HydroCAD Software Solutions LLC
Pond 4: Surface Ponding & Pipe Storage 2 @ Str #2
InflowOutflowPrimarySecondary
Hydrograph
Time (hours)484644424038363432302826242220181614121086420
Flo
w (
cfs)
7
6
5
4
3
2
1
0
Inflow Area=1.353 acPeak Elev=917.94'
Storage=361 cf
6.44 cfs
5.51 cfs5.51 cfs
0.00 cfs
Type II 24-hr Dublin 025 Rainfall=4.44"17-0001-837 Crown Mercedes Printed 6/8/2017Prepared by Advanced Civil Design
Page 52HydroCAD® 10.00-17 s/n 09322 © 2016 HydroCAD Software Solutions LLC
Summary for Subcatchment 5: Roof Top Trib Area
Runoff = 1.95 cfs @ 11.95 hrs, Volume= 0.107 af, Depth= 4.20"
Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-48.00 hrs, dt= 0.05 hrsType II 24-hr Dublin 025 Rainfall=4.44"
Area (ac) CN Description0.306 98 Roofs, HSG D0.306 100.00% Impervious Area
Tc Length Slope Velocity Capacity Description(min) (feet) (ft/ft) (ft/sec) (cfs)
5.0 Direct Entry,
Subcatchment 5: Roof Top Trib Area
Runoff
Hydrograph
Time (hours)484644424038363432302826242220181614121086420
Flo
w (
cfs)
2
1
0
Type II 24-hrDublin 025 Rainfall=4.44"
Runoff Area=0.306 acRunoff Volume=0.107 af
Runoff Depth=4.20"Tc=5.0 min
CN=98
1.95 cfs
Type II 24-hr Dublin 025 Rainfall=4.44"17-0001-837 Crown Mercedes Printed 6/8/2017Prepared by Advanced Civil Design
Page 53HydroCAD® 10.00-17 s/n 09322 © 2016 HydroCAD Software Solutions LLC
Summary for Subcatchment 6: Storm Tech Trib Area
Runoff = 1.60 cfs @ 12.01 hrs, Volume= 0.093 af, Depth= 3.44"
Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-48.00 hrs, dt= 0.05 hrsType II 24-hr Dublin 025 Rainfall=4.44"
Area (ac) CN Description* 0.118 80 Grass* 0.205 98 Pavement
0.323 91 Weighted Average0.118 36.53% Pervious Area0.205 63.47% Impervious Area
Tc Length Slope Velocity Capacity Description(min) (feet) (ft/ft) (ft/sec) (cfs)10.0 Direct Entry, Storm Sewer Minimum
Subcatchment 6: Storm Tech Trib Area
Runoff
Hydrograph
Time (hours)484644424038363432302826242220181614121086420
Flo
w (
cfs) 1
0
Type II 24-hrDublin 025 Rainfall=4.44"
Runoff Area=0.323 acRunoff Volume=0.093 af
Runoff Depth=3.44"Tc=10.0 min
CN=91
1.60 cfs
Type II 24-hr Dublin 025 Rainfall=4.44"17-0001-837 Crown Mercedes Printed 6/8/2017Prepared by Advanced Civil Design
Page 54HydroCAD® 10.00-17 s/n 09322 © 2016 HydroCAD Software Solutions LLC
Summary for Pond 7: Underground StormTech System
Inflow Area = 1.982 ac, 69.93% Impervious, Inflow Depth = 4.17" for Dublin 025 eventInflow = 8.86 cfs @ 11.97 hrs, Volume= 0.688 afOutflow = 3.59 cfs @ 12.50 hrs, Volume= 0.675 af, Atten= 60%, Lag= 32.0 minPrimary = 3.59 cfs @ 12.50 hrs, Volume= 0.675 afTertiary = 0.00 cfs @ 0.00 hrs, Volume= 0.000 af
Routing by Dyn-Stor-Ind method, Time Span= 0.00-48.00 hrs, dt= 0.05 hrs / 3Peak Elev= 916.27' @ 12.51 hrs Surf.Area= 5,086 sf Storage= 11,446 cf
Plug-Flow detention time= 118.9 min calculated for 0.675 af (98% of inflow)Center-of-Mass det. time= 106.8 min ( 885.1 - 778.4 )
Volume Invert Avail.Storage Storage Description#1 912.20' 2,830 cf Perimeter Stone (Prismatic) Listed below (Recalc)
9,649 cf Overall - 2,573 cf Embedded = 7,076 cf x 40.0% Voids#2 912.70' 2,573 cf ADS_StormTech SC-740 4 Rows of 14 units x 56 Inside #1
Effective Size= 44.6"W x 30.0"H => 6.45 sf x 7.12'L = 45.9 cfOverall Size= 51.0"W x 30.0"H x 7.56'L with 0.44' Overlap4 Rows of 14 Chambers
#3 912.20' 1,628 cf Perimeter Stone (Prismatic) Listed below (Recalc)5,355 cf Overall - 1,286 cf Embedded = 4,069 cf x 40.0% Voids
#4 912.70' 1,286 cf ADS_StormTech SC-740 1 Row of 14 units x 28 Inside #3Effective Size= 44.6"W x 30.0"H => 6.45 sf x 7.12'L = 45.9 cfOverall Size= 51.0"W x 30.0"H x 7.56'L with 0.44' Overlap2 Rows of 14 Chambers
#5 912.20' 1,109 cf Perimeter Stone - Isolator Row (Prismatic) Listed below (Recalc)3,507 cf Overall - 735 cf Embedded = 2,772 cf x 40.0% Voids
#6 912.70' 735 cf ADS_StormTech SC-740 - Isolator Row x 16 Inside #5Effective Size= 44.6"W x 30.0"H => 6.45 sf x 7.12'L = 45.9 cfOverall Size= 51.0"W x 30.0"H x 7.56'L with 0.44' Overlap
#7 912.20' 962 cf Perimeter Stone - Isolator Row (Prismatic) Listed below (Recalc)3,003 cf Overall - 597 cf Embedded = 2,406 cf x 40.0% Voids
#8 912.70' 597 cf ADS_StormTech SC-740 - Isolator Row x 13 Inside #7Effective Size= 44.6"W x 30.0"H => 6.45 sf x 7.12'L = 45.9 cfOverall Size= 51.0"W x 30.0"H x 7.56'L with 0.44' Overlap
#9 912.70' 44 cf 12.0" Round Pipe Storage Storm Tech - Str #2L= 55.4' S= 0.0044 '/'
11,764 cf Total Available Storage
Elevation Surf.Area Inc.Store Cum.Store(feet) (sq-ft) (cubic-feet) (cubic-feet)
912.20 2,281 0 0916.43 2,281 9,649 9,649
Elevation Surf.Area Inc.Store Cum.Store(feet) (sq-ft) (cubic-feet) (cubic-feet)
912.20 1,266 0 0916.43 1,266 5,355 5,355
Type II 24-hr Dublin 025 Rainfall=4.44"17-0001-837 Crown Mercedes Printed 6/8/2017Prepared by Advanced Civil Design
Page 55HydroCAD® 10.00-17 s/n 09322 © 2016 HydroCAD Software Solutions LLC
Elevation Surf.Area Inc.Store Cum.Store(feet) (sq-ft) (cubic-feet) (cubic-feet)
912.20 829 0 0916.43 829 3,507 3,507
Elevation Surf.Area Inc.Store Cum.Store(feet) (sq-ft) (cubic-feet) (cubic-feet)
912.20 710 0 0916.43 710 3,003 3,003
Device Routing Invert Outlet Devices#1 Primary 912.14' 18.0" Round Culvert
L= 137.9' RCP, square edge headwall, Ke= 0.500 Inlet / Outlet Invert= 912.14' / 911.82' S= 0.0023 '/' Cc= 0.900 n= 0.013 Concrete pipe, bends & connections, Flow Area= 1.77 sf
#2 Device 1 912.20' 0.7" Vert. Underdrain C= 0.600 #3 Device 1 912.70' 6.5" Vert. Orifice C= 0.600 #4 Device 1 915.05' 6.0" W x 7.0" H Vert. Window C= 0.600 #5 Device 1 916.20' 3.0' long Sharp-Crested Rectangular Weir 2 End Contraction(s) #6 Tertiary 916.98' 4.0' long x 1.0' breadth Broad-Crested Rectangular Weir
Head (feet) 0.20 0.40 0.60 0.80 1.00 1.20 1.40 1.60 1.80 2.00 2.50 3.00 Coef. (English) 2.69 2.72 2.75 2.85 2.98 3.08 3.20 3.28 3.31 3.30 3.31 3.32
Primary OutFlow Max=3.57 cfs @ 12.50 hrs HW=916.27' (Free Discharge)1=Culvert (Passes 3.57 cfs of 12.15 cfs potential flow)
2=Underdrain (Orifice Controls 0.03 cfs @ 9.68 fps)3=Orifice (Orifice Controls 2.02 cfs @ 8.75 fps)4=Window (Orifice Controls 1.35 cfs @ 4.62 fps)5=Sharp-Crested Rectangular Weir (Weir Controls 0.18 cfs @ 0.87 fps)
Tertiary OutFlow Max=0.00 cfs @ 0.00 hrs HW=912.20' (Free Discharge)6=Broad-Crested Rectangular Weir ( Controls 0.00 cfs)
Type II 24-hr Dublin 025 Rainfall=4.44"17-0001-837 Crown Mercedes Printed 6/8/2017Prepared by Advanced Civil Design
Page 56HydroCAD® 10.00-17 s/n 09322 © 2016 HydroCAD Software Solutions LLC
Pond 7: Underground StormTech System
InflowOutflowPrimaryTertiary
Hydrograph
Time (hours)484644424038363432302826242220181614121086420
Flo
w (
cfs)
9
8
7
6
5
4
3
2
1
0
Inflow Area=1.982 acPeak Elev=916.27'Storage=11,446 cf
8.86 cfs
3.59 cfs3.59 cfs
0.00 cfs
Type II 24-hr Dublin 050 Rainfall=5.02"17-0001-837 Crown Mercedes Printed 6/8/2017Prepared by Advanced Civil Design
Page 57HydroCAD® 10.00-17 s/n 09322 © 2016 HydroCAD Software Solutions LLC
Summary for Subcatchment 1: Str #4 Trib Area
Runoff = 5.57 cfs @ 12.01 hrs, Volume= 0.329 af, Depth= 4.11"
Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-48.00 hrs, dt= 0.05 hrsType II 24-hr Dublin 050 Rainfall=5.02"
Area (ac) CN Description* 0.631 98 Pavement* 0.329 80 Grass
0.960 92 Weighted Average0.329 34.27% Pervious Area0.631 65.73% Impervious Area
Tc Length Slope Velocity Capacity Description(min) (feet) (ft/ft) (ft/sec) (cfs)10.0 Direct Entry, Storm Sewer Minimum
Subcatchment 1: Str #4 Trib Area
Runoff
Hydrograph
Time (hours)484644424038363432302826242220181614121086420
Flo
w (
cfs)
6
5
4
3
2
1
0
Type II 24-hrDublin 050 Rainfall=5.02"
Runoff Area=0.960 acRunoff Volume=0.329 af
Runoff Depth=4.11"Tc=10.0 min
CN=92
5.57 cfs
Type II 24-hr Dublin 050 Rainfall=5.02"17-0001-837 Crown Mercedes Printed 6/8/2017Prepared by Advanced Civil Design
Page 58HydroCAD® 10.00-17 s/n 09322 © 2016 HydroCAD Software Solutions LLC
Summary for Pond 2: Surface Ponding @ Str #4
Inflow Area = 0.960 ac, 65.73% Impervious, Inflow Depth = 4.11" for Dublin 050 eventInflow = 5.57 cfs @ 12.01 hrs, Volume= 0.329 afOutflow = 4.81 cfs @ 11.94 hrs, Volume= 0.329 af, Atten= 14%, Lag= 0.0 minPrimary = 4.57 cfs @ 11.95 hrs, Volume= 0.342 afSecondary = 0.00 cfs @ 0.00 hrs, Volume= 0.000 af
Routing by Dyn-Stor-Ind method, Time Span= 0.00-48.00 hrs, dt= 0.05 hrs / 3Peak Elev= 918.30' @ 12.14 hrs Surf.Area= 3,616 sf Storage= 2,020 cf
Plug-Flow detention time= (not calculated: outflow precedes inflow)Center-of-Mass det. time= 2.8 min ( 785.8 - 782.9 )
Volume Invert Avail.Storage Storage Description#1 917.20' 3,206 cf Surface Ponding (Prismatic) Listed below (Recalc)#2 913.52' 26 cf 3.00'D x 3.70'H Str #5
3,232 cf Total Available Storage
Elevation Surf.Area Inc.Store Cum.Store(feet) (sq-ft) (cubic-feet) (cubic-feet)
917.20 4 0 0918.60 4,576 3,206 3,206
Device Routing Invert Outlet Devices#1 Primary 913.52' 12.0" Round Culvert
L= 55.4' RCP, square edge headwall, Ke= 0.500 Inlet / Outlet Invert= 913.52' / 913.28' S= 0.0043 '/' Cc= 0.900 n= 0.013 Concrete pipe, bends & connections, Flow Area= 0.79 sf
#2 Secondary 918.60' 5.0' long x 1.0' breadth Broad-Crested Rectangular Weir Head (feet) 0.20 0.40 0.60 0.80 1.00 1.20 1.40 1.60 1.80 2.00 2.50 3.00 Coef. (English) 2.69 2.72 2.75 2.85 2.98 3.08 3.20 3.28 3.31 3.30 3.31 3.32
Primary OutFlow Max=0.00 cfs @ 11.95 hrs HW=917.37' TW=917.84' (Dynamic Tailwater)1=Culvert ( Controls 0.00 cfs)
Secondary OutFlow Max=0.00 cfs @ 0.00 hrs HW=913.52' TW=912.94' (Dynamic Tailwater)2=Broad-Crested Rectangular Weir ( Controls 0.00 cfs)
Type II 24-hr Dublin 050 Rainfall=5.02"17-0001-837 Crown Mercedes Printed 6/8/2017Prepared by Advanced Civil Design
Page 59HydroCAD® 10.00-17 s/n 09322 © 2016 HydroCAD Software Solutions LLC
Pond 2: Surface Ponding @ Str #4
InflowOutflowPrimarySecondary
Hydrograph
Time (hours)484644424038363432302826242220181614121086420
Flo
w (
cfs)
6
5
4
3
2
1
0
Inflow Area=0.960 acPeak Elev=918.30'
Storage=2,020 cf
5.57 cfs
4.81 cfs
4.57 cfs
0.00 cfs
Type II 24-hr Dublin 050 Rainfall=5.02"17-0001-837 Crown Mercedes Printed 6/8/2017Prepared by Advanced Civil Design
Page 60HydroCAD® 10.00-17 s/n 09322 © 2016 HydroCAD Software Solutions LLC
Summary for Subcatchment 3: Str #2 Trib Area
Runoff = 2.24 cfs @ 12.01 hrs, Volume= 0.131 af, Depth= 4.00"
Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-48.00 hrs, dt= 0.05 hrsType II 24-hr Dublin 050 Rainfall=5.02"
Area (ac) CN Description* 0.149 80 Grass* 0.244 98 Pavement
0.393 91 Weighted Average0.149 37.91% Pervious Area0.244 62.09% Impervious Area
Tc Length Slope Velocity Capacity Description(min) (feet) (ft/ft) (ft/sec) (cfs)10.0 Direct Entry, Storm Sewer Minimum
Subcatchment 3: Str #2 Trib Area
Runoff
Hydrograph
Time (hours)484644424038363432302826242220181614121086420
Flo
w (
cfs)
2
1
0
Type II 24-hrDublin 050 Rainfall=5.02"
Runoff Area=0.393 acRunoff Volume=0.131 af
Runoff Depth=4.00"Tc=10.0 min
CN=91
2.24 cfs
Type II 24-hr Dublin 050 Rainfall=5.02"17-0001-837 Crown Mercedes Printed 6/8/2017Prepared by Advanced Civil Design
Page 61HydroCAD® 10.00-17 s/n 09322 © 2016 HydroCAD Software Solutions LLC
Summary for Pond 4: Surface Ponding & Pipe Storage 2 @ Str #2
Inflow Area = 1.353 ac, 64.67% Impervious, Inflow Depth = 4.19" for Dublin 050 eventInflow = 6.48 cfs @ 11.96 hrs, Volume= 0.473 afOutflow = 5.47 cfs @ 11.96 hrs, Volume= 0.473 af, Atten= 16%, Lag= 0.4 minPrimary = 5.47 cfs @ 11.96 hrs, Volume= 0.473 afSecondary = 0.00 cfs @ 0.00 hrs, Volume= 0.000 af
Routing by Dyn-Stor-Ind method, Time Span= 0.00-48.00 hrs, dt= 0.05 hrs / 3Peak Elev= 918.01' @ 12.01 hrs Surf.Area= 1,189 sf Storage= 438 cf
Plug-Flow detention time= 1.8 min calculated for 0.472 af (100% of inflow)Center-of-Mass det. time= 1.8 min ( 786.2 - 784.4 )
Volume Invert Avail.Storage Storage Description#1 912.94' 100 cf 3.00'D x 4.73'H Str #2 x 3#2 912.94' 61 cf 12.0" Round Pipe Storage Str #2 - Str #3
L= 77.9' S= 0.0044 '/'#3 913.28' 42 cf 3.00'D x 5.95'H Str #3#4 913.28' 44 cf 12.0" Round Pipe Storage Str #3 - Str #4
L= 55.4' S= 0.0040 '/'#5 917.67' 1,466 cf Str #2 Surface Ponding (Prismatic) Listed below (Recalc)
1,713 cf Total Available Storage
Elevation Surf.Area Inc.Store Cum.Store(feet) (sq-ft) (cubic-feet) (cubic-feet)
917.67 4 0 0918.60 3,148 1,466 1,466
Device Routing Invert Outlet Devices#1 Primary 912.94' 12.0" Round Culvert
L= 55.4' RCP, square edge headwall, Ke= 0.500 Inlet / Outlet Invert= 912.94' / 912.70' S= 0.0043 '/' Cc= 0.900 n= 0.013 Concrete pipe, bends & connections, Flow Area= 0.79 sf
#2 Device 1 912.94' 10.5" Vert. Orifice Plate C= 0.600 #3 Secondary 918.60' 5.0' long x 1.0' breadth Broad-Crested Rectangular Weir
Head (feet) 0.20 0.40 0.60 0.80 1.00 1.20 1.40 1.60 1.80 2.00 2.50 3.00 Coef. (English) 2.69 2.72 2.75 2.85 2.98 3.08 3.20 3.28 3.31 3.30 3.31 3.32
Primary OutFlow Max=5.31 cfs @ 11.96 hrs HW=917.92' TW=914.56' (Dynamic Tailwater)1=Culvert (Passes 5.31 cfs of 6.42 cfs potential flow)
2=Orifice Plate (Orifice Controls 5.31 cfs @ 8.83 fps)
Secondary OutFlow Max=0.00 cfs @ 0.00 hrs HW=912.94' TW=912.20' (Dynamic Tailwater)3=Broad-Crested Rectangular Weir ( Controls 0.00 cfs)
Type II 24-hr Dublin 050 Rainfall=5.02"17-0001-837 Crown Mercedes Printed 6/8/2017Prepared by Advanced Civil Design
Page 62HydroCAD® 10.00-17 s/n 09322 © 2016 HydroCAD Software Solutions LLC
Pond 4: Surface Ponding & Pipe Storage 2 @ Str #2
InflowOutflowPrimarySecondary
Hydrograph
Time (hours)484644424038363432302826242220181614121086420
Flo
w (
cfs)
7
6
5
4
3
2
1
0
Inflow Area=1.353 acPeak Elev=918.01'
Storage=438 cf
6.48 cfs
5.47 cfs5.47 cfs
0.00 cfs
Type II 24-hr Dublin 050 Rainfall=5.02"17-0001-837 Crown Mercedes Printed 6/8/2017Prepared by Advanced Civil Design
Page 63HydroCAD® 10.00-17 s/n 09322 © 2016 HydroCAD Software Solutions LLC
Summary for Subcatchment 5: Roof Top Trib Area
Runoff = 2.21 cfs @ 11.95 hrs, Volume= 0.122 af, Depth= 4.78"
Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-48.00 hrs, dt= 0.05 hrsType II 24-hr Dublin 050 Rainfall=5.02"
Area (ac) CN Description0.306 98 Roofs, HSG D0.306 100.00% Impervious Area
Tc Length Slope Velocity Capacity Description(min) (feet) (ft/ft) (ft/sec) (cfs)
5.0 Direct Entry,
Subcatchment 5: Roof Top Trib Area
Runoff
Hydrograph
Time (hours)484644424038363432302826242220181614121086420
Flo
w (
cfs)
2
1
0
Type II 24-hrDublin 050 Rainfall=5.02"
Runoff Area=0.306 acRunoff Volume=0.122 af
Runoff Depth=4.78"Tc=5.0 min
CN=98
2.21 cfs
Type II 24-hr Dublin 050 Rainfall=5.02"17-0001-837 Crown Mercedes Printed 6/8/2017Prepared by Advanced Civil Design
Page 64HydroCAD® 10.00-17 s/n 09322 © 2016 HydroCAD Software Solutions LLC
Summary for Subcatchment 6: Storm Tech Trib Area
Runoff = 1.84 cfs @ 12.01 hrs, Volume= 0.108 af, Depth= 4.00"
Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-48.00 hrs, dt= 0.05 hrsType II 24-hr Dublin 050 Rainfall=5.02"
Area (ac) CN Description* 0.118 80 Grass* 0.205 98 Pavement
0.323 91 Weighted Average0.118 36.53% Pervious Area0.205 63.47% Impervious Area
Tc Length Slope Velocity Capacity Description(min) (feet) (ft/ft) (ft/sec) (cfs)10.0 Direct Entry, Storm Sewer Minimum
Subcatchment 6: Storm Tech Trib Area
Runoff
Hydrograph
Time (hours)484644424038363432302826242220181614121086420
Flo
w (
cfs)
2
1
0
Type II 24-hrDublin 050 Rainfall=5.02"
Runoff Area=0.323 acRunoff Volume=0.108 af
Runoff Depth=4.00"Tc=10.0 min
CN=91
1.84 cfs
Type II 24-hr Dublin 050 Rainfall=5.02"17-0001-837 Crown Mercedes Printed 6/8/2017Prepared by Advanced Civil Design
Page 65HydroCAD® 10.00-17 s/n 09322 © 2016 HydroCAD Software Solutions LLC
Summary for Pond 7: Underground StormTech System
Inflow Area = 1.982 ac, 69.93% Impervious, Inflow Depth = 4.25" for Dublin 050 eventInflow = 9.30 cfs @ 11.97 hrs, Volume= 0.702 afOutflow = 3.42 cfs @ 12.35 hrs, Volume= 0.689 af, Atten= 63%, Lag= 23.1 minPrimary = 3.42 cfs @ 12.35 hrs, Volume= 0.689 afTertiary = 0.00 cfs @ 0.00 hrs, Volume= 0.000 af
Routing by Dyn-Stor-Ind method, Time Span= 0.00-48.00 hrs, dt= 0.05 hrs / 3Peak Elev= 916.24' @ 12.35 hrs Surf.Area= 5,086 sf Storage= 11,369 cf
Plug-Flow detention time= 118.2 min calculated for 0.688 af (98% of inflow)Center-of-Mass det. time= 107.6 min ( 886.4 - 778.8 )
Volume Invert Avail.Storage Storage Description#1 912.20' 2,830 cf Perimeter Stone (Prismatic) Listed below (Recalc)
9,649 cf Overall - 2,573 cf Embedded = 7,076 cf x 40.0% Voids#2 912.70' 2,573 cf ADS_StormTech SC-740 4 Rows of 14 units x 56 Inside #1
Effective Size= 44.6"W x 30.0"H => 6.45 sf x 7.12'L = 45.9 cfOverall Size= 51.0"W x 30.0"H x 7.56'L with 0.44' Overlap4 Rows of 14 Chambers
#3 912.20' 1,628 cf Perimeter Stone (Prismatic) Listed below (Recalc)5,355 cf Overall - 1,286 cf Embedded = 4,069 cf x 40.0% Voids
#4 912.70' 1,286 cf ADS_StormTech SC-740 1 Row of 14 units x 28 Inside #3Effective Size= 44.6"W x 30.0"H => 6.45 sf x 7.12'L = 45.9 cfOverall Size= 51.0"W x 30.0"H x 7.56'L with 0.44' Overlap2 Rows of 14 Chambers
#5 912.20' 1,109 cf Perimeter Stone - Isolator Row (Prismatic) Listed below (Recalc)3,507 cf Overall - 735 cf Embedded = 2,772 cf x 40.0% Voids
#6 912.70' 735 cf ADS_StormTech SC-740 - Isolator Row x 16 Inside #5Effective Size= 44.6"W x 30.0"H => 6.45 sf x 7.12'L = 45.9 cfOverall Size= 51.0"W x 30.0"H x 7.56'L with 0.44' Overlap
#7 912.20' 962 cf Perimeter Stone - Isolator Row (Prismatic) Listed below (Recalc)3,003 cf Overall - 597 cf Embedded = 2,406 cf x 40.0% Voids
#8 912.70' 597 cf ADS_StormTech SC-740 - Isolator Row x 13 Inside #7Effective Size= 44.6"W x 30.0"H => 6.45 sf x 7.12'L = 45.9 cfOverall Size= 51.0"W x 30.0"H x 7.56'L with 0.44' Overlap
#9 912.70' 44 cf 12.0" Round Pipe Storage Storm Tech - Str #2L= 55.4' S= 0.0044 '/'
11,764 cf Total Available Storage
Elevation Surf.Area Inc.Store Cum.Store(feet) (sq-ft) (cubic-feet) (cubic-feet)
912.20 2,281 0 0916.43 2,281 9,649 9,649
Elevation Surf.Area Inc.Store Cum.Store(feet) (sq-ft) (cubic-feet) (cubic-feet)
912.20 1,266 0 0916.43 1,266 5,355 5,355
Type II 24-hr Dublin 050 Rainfall=5.02"17-0001-837 Crown Mercedes Printed 6/8/2017Prepared by Advanced Civil Design
Page 66HydroCAD® 10.00-17 s/n 09322 © 2016 HydroCAD Software Solutions LLC
Elevation Surf.Area Inc.Store Cum.Store(feet) (sq-ft) (cubic-feet) (cubic-feet)
912.20 829 0 0916.43 829 3,507 3,507
Elevation Surf.Area Inc.Store Cum.Store(feet) (sq-ft) (cubic-feet) (cubic-feet)
912.20 710 0 0916.43 710 3,003 3,003
Device Routing Invert Outlet Devices#1 Primary 912.14' 18.0" Round Culvert
L= 137.9' RCP, square edge headwall, Ke= 0.500 Inlet / Outlet Invert= 912.14' / 911.82' S= 0.0023 '/' Cc= 0.900 n= 0.013 Concrete pipe, bends & connections, Flow Area= 1.77 sf
#2 Device 1 912.20' 0.7" Vert. Underdrain C= 0.600 #3 Device 1 912.70' 6.5" Vert. Orifice C= 0.600 #4 Device 1 915.05' 6.0" W x 7.0" H Vert. Window C= 0.600 #5 Device 1 916.20' 3.0' long Sharp-Crested Rectangular Weir 2 End Contraction(s) #6 Tertiary 916.98' 4.0' long x 1.0' breadth Broad-Crested Rectangular Weir
Head (feet) 0.20 0.40 0.60 0.80 1.00 1.20 1.40 1.60 1.80 2.00 2.50 3.00 Coef. (English) 2.69 2.72 2.75 2.85 2.98 3.08 3.20 3.28 3.31 3.30 3.31 3.32
Primary OutFlow Max=3.42 cfs @ 12.35 hrs HW=916.24' (Free Discharge)1=Culvert (Passes 3.42 cfs of 12.08 cfs potential flow)
2=Underdrain (Orifice Controls 0.03 cfs @ 9.64 fps)3=Orifice (Orifice Controls 2.00 cfs @ 8.70 fps)4=Window (Orifice Controls 1.32 cfs @ 4.53 fps)5=Sharp-Crested Rectangular Weir (Weir Controls 0.07 cfs @ 0.62 fps)
Tertiary OutFlow Max=0.00 cfs @ 0.00 hrs HW=912.20' (Free Discharge)6=Broad-Crested Rectangular Weir ( Controls 0.00 cfs)
Type II 24-hr Dublin 050 Rainfall=5.02"17-0001-837 Crown Mercedes Printed 6/8/2017Prepared by Advanced Civil Design
Page 67HydroCAD® 10.00-17 s/n 09322 © 2016 HydroCAD Software Solutions LLC
Pond 7: Underground StormTech System
InflowOutflowPrimaryTertiary
Hydrograph
Time (hours)484644424038363432302826242220181614121086420
Flo
w (
cfs)
10
9
8
7
6
5
4
3
2
1
0
Inflow Area=1.982 acPeak Elev=916.24'Storage=11,369 cf
9.30 cfs
3.42 cfs3.42 cfs
0.00 cfs
Type II 24-hr Dublin 100 Rainfall=5.63"17-0001-837 Crown Mercedes Printed 6/8/2017Prepared by Advanced Civil Design
Page 68HydroCAD® 10.00-17 s/n 09322 © 2016 HydroCAD Software Solutions LLC
Summary for Subcatchment 1: Str #4 Trib Area
Runoff = 6.33 cfs @ 12.01 hrs, Volume= 0.376 af, Depth= 4.71"
Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-48.00 hrs, dt= 0.05 hrsType II 24-hr Dublin 100 Rainfall=5.63"
Area (ac) CN Description* 0.631 98 Pavement* 0.329 80 Grass
0.960 92 Weighted Average0.329 34.27% Pervious Area0.631 65.73% Impervious Area
Tc Length Slope Velocity Capacity Description(min) (feet) (ft/ft) (ft/sec) (cfs)10.0 Direct Entry, Storm Sewer Minimum
Subcatchment 1: Str #4 Trib Area
Runoff
Hydrograph
Time (hours)484644424038363432302826242220181614121086420
Flo
w (
cfs)
7
6
5
4
3
2
1
0
Type II 24-hrDublin 100 Rainfall=5.63"
Runoff Area=0.960 acRunoff Volume=0.376 af
Runoff Depth=4.71"Tc=10.0 min
CN=92
6.33 cfs
Type II 24-hr Dublin 100 Rainfall=5.63"17-0001-837 Crown Mercedes Printed 6/8/2017Prepared by Advanced Civil Design
Page 69HydroCAD® 10.00-17 s/n 09322 © 2016 HydroCAD Software Solutions LLC
Summary for Pond 2: Surface Ponding @ Str #4
Inflow Area = 0.960 ac, 65.73% Impervious, Inflow Depth = 4.71" for Dublin 100 eventInflow = 6.33 cfs @ 12.01 hrs, Volume= 0.376 afOutflow = 4.28 cfs @ 11.89 hrs, Volume= 0.378 af, Atten= 32%, Lag= 0.0 minPrimary = 4.17 cfs @ 11.92 hrs, Volume= 0.394 afSecondary = 0.00 cfs @ 0.00 hrs, Volume= 0.000 af
Routing by Dyn-Stor-Ind method, Time Span= 0.00-48.00 hrs, dt= 0.05 hrs / 3Peak Elev= 918.51' @ 12.16 hrs Surf.Area= 4,290 sf Storage= 2,835 cf
Plug-Flow detention time= (not calculated: outflow precedes inflow)Center-of-Mass det. time= 4.4 min ( 783.8 - 779.4 )
Volume Invert Avail.Storage Storage Description#1 917.20' 3,206 cf Surface Ponding (Prismatic) Listed below (Recalc)#2 913.52' 26 cf 3.00'D x 3.70'H Str #5
3,232 cf Total Available Storage
Elevation Surf.Area Inc.Store Cum.Store(feet) (sq-ft) (cubic-feet) (cubic-feet)
917.20 4 0 0918.60 4,576 3,206 3,206
Device Routing Invert Outlet Devices#1 Primary 913.52' 12.0" Round Culvert
L= 55.4' RCP, square edge headwall, Ke= 0.500 Inlet / Outlet Invert= 913.52' / 913.28' S= 0.0043 '/' Cc= 0.900 n= 0.013 Concrete pipe, bends & connections, Flow Area= 0.79 sf
#2 Secondary 918.60' 5.0' long x 1.0' breadth Broad-Crested Rectangular Weir Head (feet) 0.20 0.40 0.60 0.80 1.00 1.20 1.40 1.60 1.80 2.00 2.50 3.00 Coef. (English) 2.69 2.72 2.75 2.85 2.98 3.08 3.20 3.28 3.31 3.30 3.31 3.32
Primary OutFlow Max=0.00 cfs @ 11.92 hrs HW=917.30' TW=917.73' (Dynamic Tailwater)1=Culvert ( Controls 0.00 cfs)
Secondary OutFlow Max=0.00 cfs @ 0.00 hrs HW=913.52' TW=912.94' (Dynamic Tailwater)2=Broad-Crested Rectangular Weir ( Controls 0.00 cfs)
Type II 24-hr Dublin 100 Rainfall=5.63"17-0001-837 Crown Mercedes Printed 6/8/2017Prepared by Advanced Civil Design
Page 70HydroCAD® 10.00-17 s/n 09322 © 2016 HydroCAD Software Solutions LLC
Pond 2: Surface Ponding @ Str #4
InflowOutflowPrimarySecondary
Hydrograph
Time (hours)484644424038363432302826242220181614121086420
Flo
w (
cfs)
7
6
5
4
3
2
1
0
Inflow Area=0.960 acPeak Elev=918.51'
Storage=2,835 cf
6.33 cfs
4.28 cfs4.17 cfs
0.00 cfs
Type II 24-hr Dublin 100 Rainfall=5.63"17-0001-837 Crown Mercedes Printed 6/8/2017Prepared by Advanced Civil Design
Page 71HydroCAD® 10.00-17 s/n 09322 © 2016 HydroCAD Software Solutions LLC
Summary for Subcatchment 3: Str #2 Trib Area
Runoff = 2.55 cfs @ 12.01 hrs, Volume= 0.151 af, Depth= 4.60"
Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-48.00 hrs, dt= 0.05 hrsType II 24-hr Dublin 100 Rainfall=5.63"
Area (ac) CN Description* 0.149 80 Grass* 0.244 98 Pavement
0.393 91 Weighted Average0.149 37.91% Pervious Area0.244 62.09% Impervious Area
Tc Length Slope Velocity Capacity Description(min) (feet) (ft/ft) (ft/sec) (cfs)10.0 Direct Entry, Storm Sewer Minimum
Subcatchment 3: Str #2 Trib Area
Runoff
Hydrograph
Time (hours)484644424038363432302826242220181614121086420
Flo
w (
cfs)
2
1
0
Type II 24-hrDublin 100 Rainfall=5.63"
Runoff Area=0.393 acRunoff Volume=0.151 af
Runoff Depth=4.60"Tc=10.0 min
CN=91
2.55 cfs
Type II 24-hr Dublin 100 Rainfall=5.63"17-0001-837 Crown Mercedes Printed 6/8/2017Prepared by Advanced Civil Design
Page 72HydroCAD® 10.00-17 s/n 09322 © 2016 HydroCAD Software Solutions LLC
Summary for Pond 4: Surface Ponding & Pipe Storage 2 @ Str #2
Inflow Area = 1.353 ac, 64.67% Impervious, Inflow Depth = 4.83" for Dublin 100 eventInflow = 6.25 cfs @ 11.93 hrs, Volume= 0.545 afOutflow = 5.44 cfs @ 11.92 hrs, Volume= 0.545 af, Atten= 13%, Lag= 0.0 minPrimary = 5.44 cfs @ 11.92 hrs, Volume= 0.545 afSecondary = 0.00 cfs @ 0.00 hrs, Volume= 0.000 af
Routing by Dyn-Stor-Ind method, Time Span= 0.00-48.00 hrs, dt= 0.05 hrs / 3Peak Elev= 917.98' @ 12.13 hrs Surf.Area= 1,082 sf Storage= 402 cf
Plug-Flow detention time= 1.8 min calculated for 0.544 af (100% of inflow)Center-of-Mass det. time= 1.8 min ( 783.4 - 781.7 )
Volume Invert Avail.Storage Storage Description#1 912.94' 100 cf 3.00'D x 4.73'H Str #2 x 3#2 912.94' 61 cf 12.0" Round Pipe Storage Str #2 - Str #3
L= 77.9' S= 0.0044 '/'#3 913.28' 42 cf 3.00'D x 5.95'H Str #3#4 913.28' 44 cf 12.0" Round Pipe Storage Str #3 - Str #4
L= 55.4' S= 0.0040 '/'#5 917.67' 1,466 cf Str #2 Surface Ponding (Prismatic) Listed below (Recalc)
1,713 cf Total Available Storage
Elevation Surf.Area Inc.Store Cum.Store(feet) (sq-ft) (cubic-feet) (cubic-feet)
917.67 4 0 0918.60 3,148 1,466 1,466
Device Routing Invert Outlet Devices#1 Primary 912.94' 12.0" Round Culvert
L= 55.4' RCP, square edge headwall, Ke= 0.500 Inlet / Outlet Invert= 912.94' / 912.70' S= 0.0043 '/' Cc= 0.900 n= 0.013 Concrete pipe, bends & connections, Flow Area= 0.79 sf
#2 Device 1 912.94' 10.5" Vert. Orifice Plate C= 0.600 #3 Secondary 918.60' 5.0' long x 1.0' breadth Broad-Crested Rectangular Weir
Head (feet) 0.20 0.40 0.60 0.80 1.00 1.20 1.40 1.60 1.80 2.00 2.50 3.00 Coef. (English) 2.69 2.72 2.75 2.85 2.98 3.08 3.20 3.28 3.31 3.30 3.31 3.32
Primary OutFlow Max=5.24 cfs @ 11.92 hrs HW=917.73' TW=914.46' (Dynamic Tailwater)1=Culvert (Passes 5.24 cfs of 6.34 cfs potential flow)
2=Orifice Plate (Orifice Controls 5.24 cfs @ 8.71 fps)
Secondary OutFlow Max=0.00 cfs @ 0.00 hrs HW=912.94' TW=912.20' (Dynamic Tailwater)3=Broad-Crested Rectangular Weir ( Controls 0.00 cfs)
Type II 24-hr Dublin 100 Rainfall=5.63"17-0001-837 Crown Mercedes Printed 6/8/2017Prepared by Advanced Civil Design
Page 73HydroCAD® 10.00-17 s/n 09322 © 2016 HydroCAD Software Solutions LLC
Pond 4: Surface Ponding & Pipe Storage 2 @ Str #2
InflowOutflowPrimarySecondary
Hydrograph
Time (hours)484644424038363432302826242220181614121086420
Flo
w (
cfs)
7
6
5
4
3
2
1
0
Inflow Area=1.353 acPeak Elev=917.98'
Storage=402 cf
6.25 cfs
5.44 cfs5.44 cfs
0.00 cfs
Type II 24-hr Dublin 100 Rainfall=5.63"17-0001-837 Crown Mercedes Printed 6/8/2017Prepared by Advanced Civil Design
Page 74HydroCAD® 10.00-17 s/n 09322 © 2016 HydroCAD Software Solutions LLC
Summary for Subcatchment 5: Roof Top Trib Area
Runoff = 2.48 cfs @ 11.95 hrs, Volume= 0.138 af, Depth= 5.39"
Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-48.00 hrs, dt= 0.05 hrsType II 24-hr Dublin 100 Rainfall=5.63"
Area (ac) CN Description0.306 98 Roofs, HSG D0.306 100.00% Impervious Area
Tc Length Slope Velocity Capacity Description(min) (feet) (ft/ft) (ft/sec) (cfs)
5.0 Direct Entry,
Subcatchment 5: Roof Top Trib Area
Runoff
Hydrograph
Time (hours)484644424038363432302826242220181614121086420
Flo
w (
cfs)
2
1
0
Type II 24-hrDublin 100 Rainfall=5.63"
Runoff Area=0.306 acRunoff Volume=0.138 af
Runoff Depth=5.39"Tc=5.0 min
CN=98
2.48 cfs
Type II 24-hr Dublin 100 Rainfall=5.63"17-0001-837 Crown Mercedes Printed 6/8/2017Prepared by Advanced Civil Design
Page 75HydroCAD® 10.00-17 s/n 09322 © 2016 HydroCAD Software Solutions LLC
Summary for Subcatchment 6: Storm Tech Trib Area
Runoff = 2.10 cfs @ 12.01 hrs, Volume= 0.124 af, Depth= 4.60"
Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-48.00 hrs, dt= 0.05 hrsType II 24-hr Dublin 100 Rainfall=5.63"
Area (ac) CN Description* 0.118 80 Grass* 0.205 98 Pavement
0.323 91 Weighted Average0.118 36.53% Pervious Area0.205 63.47% Impervious Area
Tc Length Slope Velocity Capacity Description(min) (feet) (ft/ft) (ft/sec) (cfs)10.0 Direct Entry, Storm Sewer Minimum
Subcatchment 6: Storm Tech Trib Area
Runoff
Hydrograph
Time (hours)484644424038363432302826242220181614121086420
Flo
w (
cfs)
2
1
0
Type II 24-hrDublin 100 Rainfall=5.63"
Runoff Area=0.323 acRunoff Volume=0.124 af
Runoff Depth=4.60"Tc=10.0 min
CN=91
2.10 cfs
Type II 24-hr Dublin 100 Rainfall=5.63"17-0001-837 Crown Mercedes Printed 6/8/2017Prepared by Advanced Civil Design
Page 76HydroCAD® 10.00-17 s/n 09322 © 2016 HydroCAD Software Solutions LLC
Summary for Pond 7: Underground StormTech System
Inflow Area = 1.982 ac, 69.93% Impervious, Inflow Depth = 4.88" for Dublin 100 eventInflow = 9.44 cfs @ 11.95 hrs, Volume= 0.806 afOutflow = 4.26 cfs @ 12.26 hrs, Volume= 0.793 af, Atten= 55%, Lag= 18.3 minPrimary = 4.26 cfs @ 12.26 hrs, Volume= 0.793 afTertiary = 0.00 cfs @ 0.00 hrs, Volume= 0.000 af
Routing by Dyn-Stor-Ind method, Time Span= 0.00-48.00 hrs, dt= 0.05 hrs / 3Peak Elev= 916.38' @ 12.26 hrs Surf.Area= 5,086 sf Storage= 11,666 cf
Plug-Flow detention time= 110.8 min calculated for 0.793 af (98% of inflow)Center-of-Mass det. time= 100.2 min ( 876.4 - 776.2 )
Volume Invert Avail.Storage Storage Description#1 912.20' 2,830 cf Perimeter Stone (Prismatic) Listed below (Recalc)
9,649 cf Overall - 2,573 cf Embedded = 7,076 cf x 40.0% Voids#2 912.70' 2,573 cf ADS_StormTech SC-740 4 Rows of 14 units x 56 Inside #1
Effective Size= 44.6"W x 30.0"H => 6.45 sf x 7.12'L = 45.9 cfOverall Size= 51.0"W x 30.0"H x 7.56'L with 0.44' Overlap4 Rows of 14 Chambers
#3 912.20' 1,628 cf Perimeter Stone (Prismatic) Listed below (Recalc)5,355 cf Overall - 1,286 cf Embedded = 4,069 cf x 40.0% Voids
#4 912.70' 1,286 cf ADS_StormTech SC-740 1 Row of 14 units x 28 Inside #3Effective Size= 44.6"W x 30.0"H => 6.45 sf x 7.12'L = 45.9 cfOverall Size= 51.0"W x 30.0"H x 7.56'L with 0.44' Overlap2 Rows of 14 Chambers
#5 912.20' 1,109 cf Perimeter Stone - Isolator Row (Prismatic) Listed below (Recalc)3,507 cf Overall - 735 cf Embedded = 2,772 cf x 40.0% Voids
#6 912.70' 735 cf ADS_StormTech SC-740 - Isolator Row x 16 Inside #5Effective Size= 44.6"W x 30.0"H => 6.45 sf x 7.12'L = 45.9 cfOverall Size= 51.0"W x 30.0"H x 7.56'L with 0.44' Overlap
#7 912.20' 962 cf Perimeter Stone - Isolator Row (Prismatic) Listed below (Recalc)3,003 cf Overall - 597 cf Embedded = 2,406 cf x 40.0% Voids
#8 912.70' 597 cf ADS_StormTech SC-740 - Isolator Row x 13 Inside #7Effective Size= 44.6"W x 30.0"H => 6.45 sf x 7.12'L = 45.9 cfOverall Size= 51.0"W x 30.0"H x 7.56'L with 0.44' Overlap
#9 912.70' 44 cf 12.0" Round Pipe Storage Storm Tech - Str #2L= 55.4' S= 0.0044 '/'
11,764 cf Total Available Storage
Elevation Surf.Area Inc.Store Cum.Store(feet) (sq-ft) (cubic-feet) (cubic-feet)
912.20 2,281 0 0916.43 2,281 9,649 9,649
Elevation Surf.Area Inc.Store Cum.Store(feet) (sq-ft) (cubic-feet) (cubic-feet)
912.20 1,266 0 0916.43 1,266 5,355 5,355
Type II 24-hr Dublin 100 Rainfall=5.63"17-0001-837 Crown Mercedes Printed 6/8/2017Prepared by Advanced Civil Design
Page 77HydroCAD® 10.00-17 s/n 09322 © 2016 HydroCAD Software Solutions LLC
Elevation Surf.Area Inc.Store Cum.Store(feet) (sq-ft) (cubic-feet) (cubic-feet)
912.20 829 0 0916.43 829 3,507 3,507
Elevation Surf.Area Inc.Store Cum.Store(feet) (sq-ft) (cubic-feet) (cubic-feet)
912.20 710 0 0916.43 710 3,003 3,003
Device Routing Invert Outlet Devices#1 Primary 912.14' 18.0" Round Culvert
L= 137.9' RCP, square edge headwall, Ke= 0.500 Inlet / Outlet Invert= 912.14' / 911.82' S= 0.0023 '/' Cc= 0.900 n= 0.013 Concrete pipe, bends & connections, Flow Area= 1.77 sf
#2 Device 1 912.20' 0.7" Vert. Underdrain C= 0.600 #3 Device 1 912.70' 6.5" Vert. Orifice C= 0.600 #4 Device 1 915.05' 6.0" W x 7.0" H Vert. Window C= 0.600 #5 Device 1 916.20' 3.0' long Sharp-Crested Rectangular Weir 2 End Contraction(s) #6 Tertiary 916.98' 4.0' long x 1.0' breadth Broad-Crested Rectangular Weir
Head (feet) 0.20 0.40 0.60 0.80 1.00 1.20 1.40 1.60 1.80 2.00 2.50 3.00 Coef. (English) 2.69 2.72 2.75 2.85 2.98 3.08 3.20 3.28 3.31 3.30 3.31 3.32
Primary OutFlow Max=4.24 cfs @ 12.26 hrs HW=916.38' (Free Discharge)1=Culvert (Passes 4.24 cfs of 12.37 cfs potential flow)
2=Underdrain (Orifice Controls 0.03 cfs @ 9.81 fps)3=Orifice (Orifice Controls 2.05 cfs @ 8.89 fps)4=Window (Orifice Controls 1.43 cfs @ 4.89 fps)5=Sharp-Crested Rectangular Weir (Weir Controls 0.74 cfs @ 1.39 fps)
Tertiary OutFlow Max=0.00 cfs @ 0.00 hrs HW=912.20' (Free Discharge)6=Broad-Crested Rectangular Weir ( Controls 0.00 cfs)
Type II 24-hr Dublin 100 Rainfall=5.63"17-0001-837 Crown Mercedes Printed 6/8/2017Prepared by Advanced Civil Design
Page 78HydroCAD® 10.00-17 s/n 09322 © 2016 HydroCAD Software Solutions LLC
Pond 7: Underground StormTech System
InflowOutflowPrimaryTertiary
Hydrograph
Time (hours)484644424038363432302826242220181614121086420
Flo
w (
cfs)
10
9
8
7
6
5
4
3
2
1
0
Inflow Area=1.982 acPeak Elev=916.38'Storage=11,666 cf
9.44 cfs
4.26 cfs4.26 cfs
0.00 cfs
APPENDIX E
WATER QUALITY CALCULATIONS
Crtown Mercedes - New DevelopmentNPDES Water Quality Requirements
New Development WQv = (C * P * A) / 12Redevelopment Development WQv = ((C * P * A) / 12) * .2
Answer: Land Use Acre % Total
Impervious 0.122 100%WQv = Pervious 0.000 0%C = Total Area 0.122P =A =
Water Quality Volume WQv = ((C x P x A) / 12)in. Ac.
ac.ft. 0.0068 = 0.89 x 0.75 x 0.122 / 12cu. ft. 296
3. Determine Runoff CoefficientWater Quality Volume Required C = 0.858 * i ^3 - 0.78 * i^2 + 0.774 * i + 0.04
TWQv = 296 CF
Drainage area (acres)
Volume
1. Is this project New Development or Redevelopment? 2. Determine Percent ImperviousNew Development
Water Quality Volume (ac.ft.)Runoff Coefficient.75-in precipitation depth (inch)
Crown Mercedes - RedevelopmentNPDES Water Quality Requirements
New Development WQv = (C * P * A) / 12Redevelopment Development WQv = ((C * P * A) / 12) * .2
Answer: Land Use Acre % Total
Impervious 1.424 70%WQv = Pervious 0.608 30%C = Total Area 2.032P =A =
Water Quality Volume WQv = ((C x P x A) / 12)in. Ac.
ac.ft. 0.0628 = 0.49 x 0.75 x 2.032 / 12cu. ft. 2,736
3. Determine Runoff CoefficientWater Quality Volume Required C = 0.858 * i ^3 - 0.78 * i^2 + 0.774 * i + 0.04
TWQv = 2,736 CF
20% treatment for RedevelopmentTWQv = 547 CF
Drainage area (acres)
Volume
1. Is this project New Development or Redevelopment? 2. Determine Percent ImperviousRedevelopment
Water Quality Volume (ac.ft.)Runoff Coefficient.75-in precipitation depth (inch)
Type II 24-hr Dublin 100 Rainfall=5.63"17-0001-837 Crown Mercedes Printed 6/8/2017Prepared by Advanced Civil Design
HydroCAD® 10.00-17 s/n 09322 © 2016 HydroCAD Software Solutions LLC
Hydrograph for Pond 7: Underground StormTech System
Time(hours)
Inflow(cfs)
Storage(cubic-feet)
Elevation(feet)
Outflow(cfs)
Primary(cfs)
Tertiary(cfs)
0.00 0.00 1,017 912.70 0.01 0.01 0.001.00 0.00 986 912.68 0.01 0.01 0.002.00 0.00 955 912.67 0.01 0.01 0.003.00 0.00 924 912.65 0.01 0.01 0.004.00 0.00 894 912.64 0.01 0.01 0.005.00 0.00 865 912.63 0.01 0.01 0.006.00 0.00 836 912.61 0.01 0.01 0.007.00 0.00 808 912.60 0.01 0.01 0.008.00 0.00 780 912.58 0.01 0.01 0.009.00 0.00 752 912.57 0.01 0.01 0.00
10.00 0.00 726 912.56 0.01 0.01 0.0011.00 0.00 699 912.54 0.01 0.01 0.0012.00 0.00 674 912.53 0.01 0.01 0.0013.00 0.00 649 912.52 0.01 0.01 0.0014.00 0.00 624 912.51 0.01 0.01 0.0015.00 0.00 600 912.49 0.01 0.01 0.0016.00 0.00 576 912.48 0.01 0.01 0.0017.00 0.00 553 912.47 0.01 0.01 0.0018.00 0.00 530 912.46 0.01 0.01 0.0019.00 0.00 508 912.45 0.01 0.01 0.0020.00 0.00 487 912.44 0.01 0.01 0.0021.00 0.00 466 912.43 0.01 0.01 0.0022.00 0.00 446 912.42 0.01 0.01 0.0023.00 0.00 426 912.41 0.01 0.01 0.0024.00 0.00 406 912.40 0.01 0.01 0.0025.00 0.00 387 912.39 0.01 0.01 0.0026.00 0.00 369 912.38 0.01 0.01 0.0027.00 0.00 351 912.37 0.00 0.00 0.0028.00 0.00 334 912.36 0.00 0.00 0.0029.00 0.00 317 912.36 0.00 0.00 0.0030.00 0.00 301 912.35 0.00 0.00 0.0031.00 0.00 285 912.34 0.00 0.00 0.0032.00 0.00 270 912.33 0.00 0.00 0.0033.00 0.00 255 912.33 0.00 0.00 0.0034.00 0.00 241 912.32 0.00 0.00 0.0035.00 0.00 228 912.31 0.00 0.00 0.0036.00 0.00 215 912.31 0.00 0.00 0.0037.00 0.00 202 912.30 0.00 0.00 0.0038.00 0.00 190 912.29 0.00 0.00 0.0039.00 0.00 179 912.29 0.00 0.00 0.0040.00 0.00 168 912.28 0.00 0.00 0.0041.00 0.00 157 912.28 0.00 0.00 0.0042.00 0.00 147 912.27 0.00 0.00 0.0043.00 0.00 138 912.27 0.00 0.00 0.0044.00 0.00 129 912.26 0.00 0.00 0.0045.00 0.00 121 912.26 0.00 0.00 0.0046.00 0.00 113 912.26 0.00 0.00 0.0047.00 0.00 106 912.25 0.00 0.00 0.0048.00 0.00 99 912.25 0.00 0.00 0.00
