ACP - Fayetteville CY10A SWU-101 Permit Application

Form SWU-101 Version Oct. 31, 2013 Page 3 of 7
IV. PROJECT INFORMATION
1. In the space provided below, briefly summarize how the stormwater runoff will be treated.
Structural storm water BMP's (sediment traps and infiltration trenches) are used to manage storm water
runoff from the site. Drainage Area #1 is shown as drainage node 221S (221S-C1, 221-C2); Drainage Area #2
is shown as drainage node 222S; Drainage Area #3 is shown as drainage node 223S; and Drainage Area #4 is
shown as 224S.
2. a. If claiming vested rights, identify the supporting documents provided and the date they were approved:
Approval of a Site Specific Development Plan or PUD Approval Date:
Valid Building Permit Issued Date:
Other: Date:
b. If claiming vested rights, identify the regulation(s) the project has been designed in accordance with:
Coastal SW – 1995 Ph II – Post Construction
3. Stormwater runoff from this project drains to the Cape Fear River basin.
4. Total Property Area: 40.16 acres 5. Total Coastal Wetlands Area: 0 acres
6. Total Surface Water Area: 0 acres
7. Total Property Area (4) – Total Coastal Wetlands Area (5) – Total Surface Water Area (6) = Total Project
Area+: 40.16 acres
Total project area shall be calculated to exclude the following: the normal pool of impounded structures, the area
between the banks of streams and rivers, the area below the Normal High Water (NHW) line or Mean High Water
MHW) line, and coastal wetlands landward from the NHW (or MHW) line. The resultant project area is used to
calculate overall percent built upon area (BUA). Non-coastal wetlands landward of the NHW (or MHW) line may
be included in the total project area.
8. Project percent of impervious area: (Total Impervious Area / Total Project Area) X 100 = 17.9/40.16 = 44.6 %
9. How many drainage areas does the project have?4 (For high density, count 1 for each proposed engineered
stormwater BMP. For low density and other projects, use 1 for the whole property area)
10. Complete the following information for each drainage area identified in Project Information item 9. If there
are more than four drainage areas in the project, attach an additional sheet with the information for each area
provided in the same format as below.
ATLANTIC COAST PIPELINE PROJECT
ATLANTIC COAST PIPELINE, LLC
AND
DOMINION ENERGY TRANSMISSION, INC.
NORTH CAROLINA CONTRACTOR/PIPE YARDS EROSION AND SEDIMENT CONTROL
PLAN
HYDRAULICS CALCULATIONS
FOR
CONTRACTOR YARD (CY SPR 10-A)
IN CUMBERLAND COUNTY, NORTH CAROLINA
Atlantic Coast Pipeline Project
NC Contractor & Pipe Yard ESC Plan – Hydraulic Calculations
02-12-2018 i
I.Introduction ....................................................................................................................... 1
II.CUMBERLAND ACP CY SPR 10-A .................................................................................. 4
A.Project and Site Descriptions .............................................................................................. 4
B.Existing Site Conditions ...................................................................................................... 4
C.Soils .............................................................................................................................. 4
D.Adjacent Areas ................................................................................................................... 5
E.Off-site Areas ...................................................................................................................... 5
F.Critical Areas ...................................................................................................................... 6
G.Erosion and Sediment Control Measures ........................................................................... 6
H.Stormwater Runoff Considerations ..................................................................................... 6
APPENDICES .............................................................................................................................. 8
APPENDIX A (CUMBERLAND ACP PY 10-A) ........................................................................ 9
APPENDIX A1: SOILS REPORT .......................................................................................... 10
APPENDIX A2: DRAINAGE AREA MAPS ........................................................................... 11
APPENDIX A3: CALCULATIONS ......................................................................................... 12
A3.1 Hydrologic and Hydraulics Calculations – HydroCAD ........................................ 13
A3.2 Composite Curve Number Calculations ............................................................... 14
A3.3 Sediment Basin Calculations ................................................................................. 15
A3.4 Infiltration Basin Calculations ............................................................................... 16
Atlantic Coast Pipeline Project
NC Contractor & Pipe Yard ESC Plan – Hydraulic Calculations
02-12-2018 ii
Appendices
Appendix A – Contractor Yard - CY SPR 10-A
A1 Soils Report
A2 Drainage Area Maps
A3 Calculations
A3.1 Hydrologic and Hydraulics Calculations – HydroCAD
A3.1.1 Watershed
A3.2 Composite Curve Number Calculations
A3.3 Sediment Basin Calculations
A3.4 Infiltration Basin Calculations
Atlantic Coast Pipeline Project
NC Contractor/Pipeline Yard ESC Plan – Hydraulic Calculations
02-12-2018
I. Introduction
As part of the Atlantic Coast Pipeline (ACP) project in North Carolina, Dominion Energy
Transmission, Inc. (DETI) will construct contractor yards and pipe yard for construction staging.
Each site, sized between 30 to 45 acres, will consist of a gravel road, gravel parking area, topsoil
blending pile, and maintained turf land for equipment over the current parcels. Sediment basins,
sediment traps, perimeter sediment barriers, and diversions will be constructed to control runoff
volume, rate, and velocity before drainage discharges from the site. Additional erosion and
sediment control (ESC) measures are detailed in the plans and narrative for the project. As such,
this report summarizes erosion and sediment control measures, hydraulic analyses, and
calculations that form the basis for the contractor yard erosion and sediment control design.
As part of the construction process of installing large diameter gas pipelines, these yards are
utilized for the purposes of daily parking for pipe liners, welding of pipe, storing of fuel, providing
offices via temporary trailers, and minor material storage. These yards are temporary and are
anticipated to be utilized for approximately two years beginning in 2018. After the construction
activities, temporary soil stockpiles, rock staging areas and equipment areas shall be removed,
regraded, and stabilized to pre-existing conditions per the landowner agreements.
The erosion and sediment control plan contained herein has been developed in accordance with
applicable provisions of the latest editions of the North Carolina Erosion and Sediment Control
Planning and Design Manual by the North Carolina Department of Environmental Quality (DEQ),
and the latest editions of the North Carolina Department of Environmental Quality Stormwater
Design Manual. As such, the plan includes provisions for erosion and sediment control for the
contractor yard and pipe yard sites. These measures are capable of minimizing or eliminating,
where possible, potentially adverse effects of the development. These measures are intended to
provide adequate protection for the environment, the project site, and to downstream properties,
which could be affected by sedimentation and changes in runoff related to construction of the
contractor yards. Perimeter controls and sediment trapping facilities shall be constructed as a
first step in land-disturbing activities. Additionally, stabilization of earthen structures is required
immediately after installation.
The proposed site disturbance area for each of the sites is greater than 1 acre. The proposed
sites will incorporate BMPs and stormwater management facilities designed to meet the
requirements enacted under North Carolina Stormwater regulations with respect to Minimum
Design Criteria (MDC) for all Stormwater Control Measures (SCMs). The sites will be restored to
their pre-development conditions to the extent feasible upon the completion of the estimated two-
year service life. The proposed SCMs that will be implemented on the site, such as perimeter
barriers, sediment basins, infiltration devices, and diversions to provide essential stormwater
quality improvements.
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NC Contractor/Pipeline Yard ESC Plan – Hydraulic Calculations
02-12-2018
For the purposes of this document, the following definitions apply:
Limits of Disturbance (LOD): The boundary within which ground disturbance occurs (or
may occur) as a result of construction-related activities.
DETI and/or the construction activity operator must design, install, implement and maintain
pollution prevention measures to:
Minimize the discharge of pollutants from equipment and vehicle washing, wheel wash
water, and other wash waters;
Minimize the exposure of building materials, building products, construction wastes, trash,
landscape materials, fertilizers, pesticides, herbicides, detergents, sanitary waste, and
other materials present on-site to precipitation and to stormwater;
Minimize the discharge of pollutants from spills and leaks and implement chemical spill and
leak prevention and response procedures;
Prohibit the discharge of wastewater from the washout of concrete;
Prohibit the discharge of wastewater from the washout and cleanout of stucco, paint, form
release oils, curing compounds, and other construction materials; and
Prohibit the discharge of fuels, oils, or other pollutants used in vehicle and equipment
operation and maintenance.
Note that DETI is formally requesting the following deviations from the NCDEQ Standard
Sediment and Erosion control measures:
Use of Belted Silt Retention Fence (BSRF) in lieu of Silt Fence (SF).
Use of Compost Filter Sock (CSF) in lieu of Silt Fence (SF).
Drainage node numbering utilized in the drainage calculations and on the drainage area maps
has been set up to be consistent for each contractor yard site and is as follows:
100S series numbers – Pre-Development for the site.
200S series numbers - (Post) ESC-Development for the site.
The modeling software utilized for the hydrologic and hydraulic analyses included:
The Time of Concentration (Tc) for both the Pre and (Post) ESC Developed condition of all
drainage areas was calculated. GIS was utilized to obtain drainage areas, flow paths, and
land use information based on readily available County GIS data. This information was
used in the HydroCAD software.
Atlantic Coast Pipeline Project
NC Contractor/Pipeline Yard ESC Plan – Hydraulic Calculations
02-12-2018
HydroCAD was the primary hydraulic software used to calculate flow rates for Q1, Q2, and
Q10, design storms to size and analyze hydraulic structures such as culverts, sediment
traps, and sediment basins, and to conduct hydraulic analysis of stream channel erosion,
channel volume capacity, and overall site hydrology.
FHWA HY8 was utilized for culvert analysis and design for the Q10 design storm and to
calculate the outlet velocity for riprap outlet protection design.
Atlantic Coast Pipeline Project
NC Contractor/Pipeline Yard ESC Plan – Hydraulic Calculations
02-12-2018
II. CUMBERLAND ACP CY SPR 10-A
A. Project and Site Descriptions
As part of the Atlantic Coast Pipeline (ACP) project, Dominion Energy Transmission Inc. is
proposing to construct a contractor staging area approximately 3.3 miles southeast of Fayetteville,
North Carolina on U.S. Highway 24. The site is located at 35°02'45.76"N and 78°49 25.94"W, and
is bounded by Highway 24 on the northeast, Downing Road on the north, Accord Rd on the west,
and an agricultural parcel to the south.
The proposed yard limits will cross two parcels identified as:
Parcel ID 0457-51-1976. The parcel (property) owner for this site is Martha L Hair & Kathy Nell
Hair Radcliff with a parcel area of 51.7 acres.
Parcel ID 0457-40-6622. The parcel (property) owner for this site is John S. Hair Jr with a parcel
area of 99.8 acres.
Table II.A-1 – Project Area Summary
Parcel Parcel (acres) Limits of Disturbance (acres)
A 51.7 14.4
B 99.8 26.2
Total 151.5 40.6
B. Existing Site Conditions
The site topography generally slopes toward the south. The grade varies from approximately one
quarter to two percent (0.25-2%) sloped towards the existing wetland near the southern edge of
Parcel B.
Currently the sites are agricultural fields, with an isolated strip of woody vegetation on the southern
corner of Parcel B and between the access roads along the east side. (Appendix A2- Drainage
Area Maps). Soils on the site are predominantly sandy loam.
C. Soils
Based on the USDA NRCS Web Soil Survey (Appendix A1), the breakdown of the soils present
within the project limits are hydrologic soil groups B, C with some A. The project site consists
mostly of Map Unit WmB and AaA soils with additional small portions of Map Unit TaB and Ro
soils.
Atlantic Coast Pipeline Project
NC Contractor/Pipeline Yard ESC Plan – Hydraulic Calculations
02-12-2018
Table II.C-1 – Project Area Underlying Soil
Unit Symbol Unit Name HSG Drainage Class
Wmb Wickham fine sandy loam B Well Drained
AaA Altavista fine sandy loam C Moderately well drained
TaB Tarboro loamy A Somewhat excessively drained
Ro Roanoke and Warne C/D Poorly Drained
The analysis incorporated this soils information by assigning various land use and corresponding
curve numbers per NRCS TR-55 Urban Hydrology for Small Watersheds. The proposed gravel
lots will be considered as impervious.
D. Adjacent Areas
The subject project area parcel is bounded by roadways on the north and west sides and
agricultural fields and residential homes on the eastern and southern side. Adjacent parcel
ownerships are summarized in the Table II.D-1.
Table II.D-1 – Adjacent Parcel Summary
Direction Adjacent Parcel Owner Land Use Description
North Highway 24
West Accord Rd
South Mary J. Clark Young Agricultural Land
South John S Hair, Jr. Agricultural Land
East Mary J. Clark Young Agricultural Land
E. Off-site Areas
Any construction activities for the project that are performed outside the limits of disturbance
depicted on the plans will be considered off-site. At this time, there are no off-site areas that have
been identified. However, if additional area for fill material is needed, or if additional sites are
needed for disposal of excess material, these sites will require an approved Erosion and Sediment
Control Plan from the Plan Approving Authority prior to soil transport to or from the off-site area.
The Erosion and Sediment Control permits must be posted at the waste/borrow area before the
site is utilized.
The proper erosion and sediment control procedures will be implemented by the Contractor for
any off-site areas required for the project. The permit holder shall be responsible for final
stabilization and maintenance of all off-site areas.
Atlantic Coast Pipeline Project
NC Contractor/Pipeline Yard ESC Plan – Hydraulic Calculations
02-12-2018
F. Critical Areas
The critical area of the project, with respect to sediment impacts, is the existing wetland on the
southern edge of the project area. Site specific practices to protect these areas are compost filter
sock, belted silt retention fence, and a sediment basin. DETI intends to utilize diversions to
reduce the existing overland slope length and direct the flow to sediment basins for downstream
protection. The erosion and sediment control practices are illustrated on the plans (Sheet 3 of 7)
and described herein. This area should be considered a critical area throughout construction and
additional protection should be provided, as needed, to ensure adequate protection of these
areas.
G. Erosion and Sediment Control Measures
The erosion and sediment control measures for the CY10A site are indicated on the plans and
include, but are not limited to, the use of rock construction entrances; compost filter sock or belted
silt retention fence; dewatering devices; rock check dam; outlet protection; riprap; culvert;
sediment barrier; stormwater conveyance channel; sediment basin, riser, barrel, emergency
spillway; and diversions. Additionally, dewatering devices may be utilized for sediment basin
cleanout during operation of the contractor yards and during site restoration when the contractor
yards are no longer needed. Unless otherwise noted, all vegetative and structural erosion and
sediment control practices are to be constructed and maintained according to the NCDEQ
standards. The Minimum Standards are to be adhered to unless otherwise waived or approved
by a variance by authorities having jurisdiction.
Drainage Area Maps are provided in Appendix A2 and ESC measures can be found on Plan
Sheet 3 of 7.
H. Stormwater Runoff Considerations
Under the post-condition and within the LOC, runoff from the northwest portion of the site (area
222S) will discharge west to an existing swale along an access road off of Downing Road. The
northeast portion of the site (area 223S) will drain north to a swale along NC Highway 24.
A large portion of the site located to the south of the 222S and 223S will drain south to an 18”
culvert under the existing access road, then to a twin 18” culvert under a gravel lot access road,
then into the Sediment Basin 221. Drainage areas from the east and west property lines combine
with the flows from the twin 18” culvert. This flow then travels into the sediment basin and
discharges out of the basin into the natural wetland drainage area in a southerly direction to the
Unnamed Tributary to Locks Creek (refer to Appendix A2 for Drainage Map Post-Condition).
The southeast corner of the site (area 224S) will discharge southeast to an existing swale which
ultimately combines with runoff from the discharge from 221S.
Atlantic Coast Pipeline Project
NC Contractor/Pipeline Yard ESC Plan – Hydraulic Calculations
02-12-2018
Water Quantity
Hydraulic calculations were evaluated using HydroCAD for the 1-, 2-, and 10-year storms.
Calculations can be found for the pre-development conditions and post-development conditions
in Appendix A3.1.1. The results are summarized in Table II.H-1.
Table II.H-1 – Outfall Summary
Drainage
Area
Pre Pre Q1
CFS)
Pre Q2
CFS)
Pre Q10
CFS)
Post Post Q1
CFS)
Post Q2
CFS)
Post Q10
CFS)
24.59 121S 20.4 30.8 64.5 221S 2.6 11.4 63.6
5.33 122S 6.8 10.4 22.1 222S 0.21 0.81 18.6
3.71 123S 2.5 3.9 8.6 223S 0.26 1.1 6.8
3.19 124S 4.1 6.2 13.2 224S 0.1 0.1 0.94
As demonstrated in the outfall summary above, the overall post development flows for the
required 1-year 24 hour runoff do not exceed the pre-development flows for each of the basins.
In addition to the 1-year storm, we have provided information in the table showing the release
rates for each of the basins for both the 2- and 10-year storms.
The site under the post-development condition will contribute less overall development discharge
than the pre-development condition.
Water Quality
To provide required water quality, each of the basins will be converted to infiltration basins once
the site is stabilized. Calculations were performed using the design equation in the State Design
Manual to size the surface area for each facility. The calculations are summarized in Appendix
A3.3 and A3.4.
Atlantic Coast Pipeline Project
NC Contractor/Pipeline Yard ESC Plan – Hydraulic Calculations
02-12-2018
APPENDICES
Atlantic Coast Pipeline Project
NC Contractor/Pipeline Yard ESC Plan – Hydraulic Calculations
02-12-2018
APPENDIX A (CUMBERLAND ACP PY 10-A)
A1 Soils Report
A2 Drainage Area Maps
A3 Calculations
Atlantic Coast Pipeline Project
NC Contractor/Pipeline Yard ESC Plan – Hydraulic Calculations
02-12-2018
APPENDIX A1: SOILS REPORT
Atlantic Coast Pipeline Project
NC Contractor/Pipeline Yard ESC Plan – Hydraulic Calculations
02-12-2018
APPENDIX A2: DRAINAGE AREA MAPS
GAGA
GA
GA
E
E
E
E
E
TS
GP
G 281
G
G
LM
PIEDMONT
LM
PIEDMONT
90410045701
LAT:35°02'38.27"
LON:78°49'20.7146"
APPROX.
LOCATION
APPROX.
LOCATION
wcuc 051e
90
LM
PIEDMONT
S09° 33' 45.90"E1326.907S82° 48'
15.42"W1195.159N08° 35' 40.
83"W789.
151N12° 47' 30.74"W671.599N66° 28'175
5 E
445.385S75°
03' 07
7
6
E
541.
71
8GATE
POSTS OVERHEAD
ELECTRIC LINEE
UNDERGROUND
GAS LINEG
FENCExCONTOUR
STREAM DITCH
CONTOUR1000
WETLANDwcuc 051e PRIVACY
FENCE
UTILITY POLE
GP GUY POLE GUY
ANCHORGA UTILITY
VALVE POST LM LINE
MARKER TS TEST STAND
TBM TEMPORARY BENCH MARK GRAVEL AREA.TOP SOIL SEGREGATION AREA 100 0 50 100 1.CONTOURS AND BASE MAP PROVIDED BY I3
ENGINEERING AND CONSULTING, LLC WITH ADDITIONAL CONTOURS OBTAINED
FROM THE USGS NATIONAL ELEVATION DATASET.THE CONTRACTOR IS RESPONSIBLE FOR VERIFYING ITS ACCURACY.2.DISCREPANCIES
FOUND IN THE PROJECT EXISTING CONDITIONS MUST BE REPORTED TO THE PROJECT ENGINEER/OWNER.3.NO GUARANTEE OR ASSURANCE IS GIVEN BY THE OWNER OR
ENGINEER AS TO THE ACCURACY, COMPLETENESS, OR VALIDITY OF THE EXISTING UTILITIES. CONTRACTOR TO PERFORM "CALL BEFORE YOU DIG"
TO COORDINATE WITH UTILITY COMPANIES, AND LOCATE AND IDENTIFY ALL UTILITIES PRIOR TO CONSTRUCTION.4.DOMINION RESERVES THE RIGHT TO USE EITHER, OR BOTH, 12" COMPOST FILTER
SOCK OR STANDARD SILT
FENCE,
FOR ANY APPLICATION IN WHICH EITHER
OF THESE TWO CONTROL MEASURES ARE SPECIFIED.CUMBERLAND
CUMBERLAND CY EXISTING DRAINAGE AREA
MAP UNNAMED TRI B U T A R Y TO LOCKS CRE E
K GENERAL NOTES
AND
COMMENTS:SYM.DATE
BY
REVISION
INFORMATION PROJECT/
TASK
APP.
SEAL APP. FORCONST.:SCALE:APP.
FOR BID:CHECKED:DRAWN:DIR/FILE:DISTRICT:TITLE:COUNTY:DWG. NO.
GROUP REV.STATE:925
White
Oaks Blvd. Bridgeport, West Virginia 26330 /
681-842-8000
Atlantic Coast Pipeline,
LLC ERM 15720 Brixham Hill Ave,
Suite 120
License #F-1223
ERM NC, INC.
Charlotte, NC 28277 (704)
541-8345 AS
NOTED
02/12/2018WTS02/12/
2018NJB 2-ACP\NorthCarolina\
ATLANTIC COASTPIPELINENCISSUED
FOR REVIEWNJB03/10/
170 ISSUED FOR
REVIEWWTS08/04/171
ISSUED FORREVIEWNJB02/12/201821 OF2LIMITSOFDISTURBANCELIMITSOF CONSTRUCTIONNC
S T A T E H I G
H W
A Y 2 4
DOWN I N
G R
O A
D ACCORD ROADFLOW
ARROW DRAINAGE AREA
NODE NUMBER
Tc SHEET FLOW
Tc SHALLOW CONCENTRATED
FLOW Tc
CHANNEL FLOW DRAINAGE
AREA BOUNDARY
SHEET FLOW LENGTH =
166 LF
Tc PIPE FLOW
SHEET
FLOW
LENGTH = 209 LF
SHEET
FLOW
LENGTH = 165 LF
SHEET
FLOW
LENGTH = 136 LF
SHALLOW
CONCENTRATED
LENGTH = 105 LF
SHALLOW
CONCENTRATED
LENGTH = 385 LF
SHALLOW
CONCENTRATED
LENGTH = 118 LF
SHALLOW CONCENTRATED
LENGTH = 285 LF
SHALLOW CONCENTRATED
LENGTH = 157 LF
SHALLOW CONCENTRATED
LENGTH = 147 LF
CHANNEL FLOW
LENGTH = 149 LF
93 94
94 93
93929494939294
93
95
95
94
93
92
9291 93 93 92 91 90
9291939392919392
94
94 93 92
91
91
93
92
94
94
93
92
91
91
92
GAGA
GA
GA
E
E
E
E
E
TS
GP
G 281
G
G
LM
PIEDMONT
LM
PIEDMONT
90410045701
APPROX.
LOCATION
APPROX.
LOCATION
wcuc 051e
90
E Q U I P M E N T
LM
PIEDMONT
S09° 33' 45.90"E1326.907S82° 48'
15.42"W1195.159N08° 35' 40.
83"W789.
151N12° 47' 30.74"W671.599N66° 28'175
5 E
445.385S75°
03' 07
7
6
E
541.71
8 GATE
POSTS
OVERHEAD ELECTRIC
LINEEUNDERGROUND
GAS LINEG
FENCE
xSTREAM DITCH PRIVACY
FENCE
UTILITY POLE
GP GUY POLE GUY
ANCHORGA UTILITY
VALVE POST LM LINE
MARKERTS
TEST STAND TBM TEMPORARY BENCH MARK
GRAVEL AREA.TOP SOIL
SEGREGATION AREA
WETLANDwcuc
051e FUEL TANK AREA (
25' x 250')TRAILER (24' x 60')STORAGE UNITS 1000 100 0 50 100 1.CONTOURS AND BASE MAP PROVIDED BY I3
ENGINEERING AND CONSULTING, LLC WITH ADDITIONAL CONTOURS OBTAINED
FROM THE USGS NATIONAL ELEVATION DATASET.THE CONTRACTOR IS RESPONSIBLE FOR VERIFYING ITS ACCURACY.2.DISCREPANCIES
FOUND IN THE PROJECT EXISTING CONDITIONS MUST BE REPORTED TO THE PROJECT ENGINEER/OWNER.3.NO GUARANTEE OR ASSURANCE IS GIVEN BY THE OWNER OR
ENGINEER AS TO THE ACCURACY, COMPLETENESS, OR VALIDITY OF THE EXISTING UTILITIES. CONTRACTOR TO PERFORM "CALL BEFORE YOU DIG"
TO COORDINATE WITH UTILITY COMPANIES, AND LOCATE AND IDENTIFY ALL UTILITIES PRIOR TO CONSTRUCTION.4.DOMINION RESERVES THE RIGHT TO USE EITHER, OR BOTH, 12" COMPOST FILTER
SOCK OR STANDARD SILT
FENCE,
FOR ANY APPLICATION IN WHICH EITHER
OF THESE TWO CONTROL MEASURES ARE SPECIFIED.CUMBERLAND
CUMBERLAND CY PROPOSED DRAINAGE AREA
MAP UNNAMED TRI B U T A R Y TO LOCKS CRE E
K GENERAL NOTES
AND
COMMENTS:SYM.DATE
BY
REVISION
INFORMATION PROJECT/
TASK
APP.
SEAL APP. FORCONST.:SCALE:APP.
FOR BID:CHECKED:DRAWN:DIR/FILE:DISTRICT:TITLE:COUNTY:DWG. NO.
GROUP REV.STATE:925
White
Oaks Blvd. Bridgeport, West Virginia 26330 /
681-842-8000
Atlantic Coast Pipeline,
LLC ERM 15720 Brixham Hill Ave,
Suite 120
License #F-1223
ERM NC, INC.
Charlotte, NC 28277 (704)
541-8345 AS
NOTED
02/12/2018WTS02/12/
2018NJB 2-ACP\NorthCarolina\
ATLANTIC COASTPIPELINENCISSUED
FOR REVIEWNJB03/10/
170 ISSUED FOR
REVIEWWTS08/04/171
ISSUED FOR REVIEWNJB02/
12/20182 2 OF
2 LIMITSOFDISTURBANCELIMITSOF CONSTRUCTIONPROPOSEDCOMPOSTFILTERSOCKORSILT FENCENC
S T A T E H I G
H W
A Y
2 4 DOWN
I
N G
R O
A D ACCORD
ROADFLOW ARROW ROCK CONSTRUCTION
ENTRANCE (OR APPROVED
ALT.)OUTLET
PROTECTION PROPOSED CULVERT
PROPOSED
DIVERSION SWALE
DRAINAGE AREA NODE
NUMBER POND
NODE NUMBER SHEET
FLOW LENGTH =
166 LF SLOPE =
SHEET
FLOW
LENGTH = 209 LF
SHEET
FLOW
LENGTH = 165 LF
SHEET
FLOW
LENGTH = 136 LF
SHALLOW
CONCENTRATED
LENGTH = 105 LF
SHALLOW
CONCENTRATED
LENGTH = 385 LF
SHALLOW
CONCENTRATED
LENGTH = 118 LF
SHALLOW CONCENTRATED
LENGTH = 285 LF
SHALLOW CONCENTRATED
LENGTH = 157 LF
SHALLOW CONCENTRATED
LENGTH = 147 LF
CHANNEL FLOW
LENGTH = 149 LF
CHANNEL FLOW LENGTH =
480 LF
PIPE FLOW
LENGTH = 24 LF
PIPE FLOW LENGTH =
32 LF Tc
SHEETFLOW
Tc SHALLOW
Service Layer Credits: Source: Esri,
DigitalGlobe, GeoEye, Earthstar Geographics,
CNES/Airbus DS, USDA, USGS, AeroGRID,
IGN, and the GIS User Community
OP24
OP24
OP24
OP24
ST1006
D o w n in g R o a d
Accord
RoadDowning
RoadClintonRoad
B
D
D
C
D
A B This information is for environmental review
purposes only.0 150
300
Fe et 1:
1,800 Existing
Drainage Basin
Site Boundary HSG
Soil Group Public
Road (OSM)FILE: M:\Clients\D-F\DOM\SRPP\_ArcGIS\2017\09\06_Water_Quality_Figures\Figures\C Y\Rev1v3\_DOM_SRP_NC_DEQ_Pre_CY.mxd | REVISED: 02/10/2018 | SCALE: 1:1,800 when printed at 36 x 24 | REVISED: 02/
10/2018 CYSpr10-AWaterQuantityAnalysisPre-Develop me nt L andcover
and HSG DRAWN
BY: TG NC °
E RM 1inch = 1
50 feet NLCD
Landcover Classes 13 -
Surveyed Waterbody 21 - Developed,
Open Space 22 - Developed,
Low Intensity 42 -
Evergreen Forest 52 -
Shrub/Scrub71 - Grass
land/Herbaceous 81 -
Pasture/Hay 82 -
Cultivated Crops 90 -
Woody Wetlands 91 - SurveyedPEM
W etland
Service Layer Credits: Source: Esri,
DigitalGlobe, GeoEye, Earthstar Geographics,
CNES/Airbus DS, USDA, USGS, AeroGRID,
IGN, and the GIS User Community
OP24
OP24
OP24
OP24
ST1006
D o w n in g R o a d
Accord
RoadDowning
RoadClintonRoad
B
D
D
C
D
A B This information is for environmental review
purposes only.0 150
300
Fe et 1:
1,800 Proposed
Drainage Basin
Site Boundary HSG
Soil Group Public
Road (OSM)FILE: M:\Clients\D-F\DOM\SRPP\_ArcGIS\2017\09\06_Water_Quality_Figures\Figures\C Y\Rev1v3\_DOM_SRP_NC_DEQ_Post_CY.mxd | REVISED: 02/10/2018 | SCALE: 1:1,800 when printed at 36 x 24 | REVISED: 02/
10/2018 CYSpr10-AWaterQuantityAnalysisPost-Deve lopmen t Landcov er
and HSG DRAWN
BY: TG NC °
E RM 1inch = 1
50 feet NLCD
Landcover Classes 11 -
Open Water 13 -
Surveyed Waterbody 21 - Developed,
Open Space 22 - Developed,
Low Intensity 42 -
Evergreen Forest 52 -
Shrub/Scrub
61 - Topsoil 71 - Grass
land/Herbaceous 81 -
Pasture/Hay 82 -
Cultivated Crops 90 -
Woody Wetlands 91 - SurveyedPEM
W etland
Atlantic Coast Pipeline Project
NC Contractor/Pipeline Yard ESC Plan – Hydraulic Calculations
02-12-2018
APPENDIX A3: CALCULATIONS
A3.1 Hydrologic and Hydraulics Calculations – HydroCAD
A3.1.1 Watershed
A3.2 Composite Curve Number Calculations
A3.3 Sediment Basin Calculations
A3.4 Infiltration Basin Calculations
Atlantic Coast Pipeline Project
NC Contractor/Pipeline Yard ESC Plan – Hydraulic Calculations
02-12-2018
A3.1 Hydrologic and Hydraulics Calculations – HydroCAD
A3.1.1 Watershed
121S
Pre Dev't
122S
Pre Dev't
123S
Pre Dev't
124S
Pre Dev't
221S
Post CY (s)
222S
Post CY (nw)
223S
Post CY (ne)
224S
Post CY (se)
221P
221
222P
SF
223P
223
224P
224
Routing Diagram for Site ContractorY10A
Prepared by AECOM, Printed 2/12/2018
HydroCAD® 10.00-16 s/n 04851 © 2015 HydroCAD Software Solutions LLC
Subcat Reach Pond Link
Site ContractorY10A
Printed 2/12/2018PreparedbyAECOM
Page2HydroCAD® 10.00-16 s/n 04851 © 2015 HydroCAD Software Solutions LLC
Area Listing (all nodes)
Area
acres)
CN Description
subcatchment-numbers)
24.590 75 (121S)
12.230 73 (122S, 123S, 124S)
24.590 87 (221S)
5.330 85 (222S)
3.710 89 (223S)
3.190 69 (224S)
73.640 80 TOTAL AREA
Site ContractorY10A
Printed 2/12/2018PreparedbyAECOM
Page3HydroCAD® 10.00-16 s/n 04851 © 2015 HydroCAD Software Solutions LLC
Soil Listing (all nodes)
Area
acres)
Soil
Group
Subcatchment
Numbers
0.000 HSG A
0.000 HSG B
0.000 HSG C
0.000 HSG D
73.640 Other 121S, 122S, 123S, 124S, 221S, 222S, 223S, 224S
73.640 TOTAL AREA
Site ContractorY10A
Printed 2/12/2018PreparedbyAECOM
Page4HydroCAD® 10.00-16 s/n 04851 © 2015 HydroCAD Software Solutions LLC
Ground Covers (all nodes)
HSG-A
acres)
HSG-B
acres)
HSG-C
acres)
HSG-D
acres)
Other
acres)
Total
acres)
Ground
Cover
Subcatchment
Numbers
0.000 0.000 0.000 0.000 73.640 73.640 121S, 122S, 123S,
124S, 221S, 222S,
223S, 224S
0.000 0.000 0.000 0.000 73.640 73.640 TOTAL
AREA
Site ContractorY10A
Printed 2/12/2018PreparedbyAECOM
Page5HydroCAD® 10.00-16 s/n 04851 © 2015 HydroCAD Software Solutions LLC
Pipe Listing (all nodes)
Line# Node
Number
In-Invert
feet)
Out-Invert
feet)
Length
feet)
Slope
ft/ft)
n Diam/Width
inches)
Height
inches)
Inside-Fill
inches)
1 121S 0.00 0.00 24.0 0.0083 0.030 36.0 0.0 0.0
2 121S 0.00 0.00 32.0 0.0063 0.030 3.0 0.0 0.0
3 221S 0.00 0.00 24.0 0.0083 0.030 3.0 0.0 0.0
4 221S 0.00 0.00 32.0 0.0063 0.030 3.0 0.0 0.0
Type II 24-hr 1 yr Rainfall=3.02"Site ContractorY10A
Printed 2/12/2018PreparedbyAECOM
Page6HydroCAD® 10.00-16 s/n 04851 © 2015 HydroCAD Software Solutions LLC
Time span=0.00-24.00 hrs, dt=0.03 hrs, 801 points
Runoff by SCS TR-20 method, UH=SCS, Weighted-CN
Reach routing by Stor-Ind+Trans method - Pond routing by Stor-Ind method
Runoff Area=24.590 ac 0.00% Impervious Runoff Depth>0.96"Subcatchment 121S: Pre Dev't
Flow Length=1,245' Tc=27.6 min CN=75 Runoff=20.44 cfs 1.977 af
Runoff Area=5.330 ac 0.00% Impervious Runoff Depth>0.87"Subcatchment 122S: Pre Dev't
Tc=10.0 min CN=73 Runoff=6.84 cfs 0.385 af
Runoff Area=3.710 ac 0.00% Impervious Runoff Depth>0.86"Subcatchment 123S: Pre Dev't
Tc=30.0 min CN=73 Runoff=2.52 cfs 0.266 af
Runoff Area=3.190 ac 0.00% Impervious Runoff Depth>0.87"Subcatchment 124S: Pre Dev't
Tc=10.0 min CN=73 Runoff=4.09 cfs 0.230 af
Runoff Area=24.590 ac 0.00% Impervious Runoff Depth>1.75"Subcatchment 221S: Post CY (s)
Flow Length=979' Tc=14.1 min CN=87 Runoff=57.39 cfs 3.587 af
Runoff Area=5.330 ac 0.00% Impervious Runoff Depth>1.60"Subcatchment 222S: Post CY (nw)
Tc=5.0 min CN=85 Runoff=15.67 cfs 0.712 af
Runoff Area=3.710 ac 0.00% Impervious Runoff Depth>1.92"Subcatchment 223S: Post CY (ne)
Tc=5.0 min CN=89 Runoff=12.76 cfs 0.592 af
Runoff Area=3.190 ac 0.00% Impervious Runoff Depth>0.68"Subcatchment 224S: Post CY (se)
Tc=5.0 min CN=69 Runoff=3.79 cfs 0.181 af
Peak Elev=93.54' Storage=136,153 cf Inflow=57.39 cfs 3.587afPond221P: 221
Outflow=1.07 cfs 0.476 af
Peak Elev=92.01' Storage=27,347 cf Inflow=15.67 cfs 0.712afPond222P: SF
Outflow=0.21 cfs 0.086 af
Peak Elev=93.64' Storage=25,797 cf Inflow=12.76 cfs 0.592afPond223P: 223
Outflow=0.00 cfs 0.000 af
Peak Elev=91.21' Storage=7,863 cf Inflow=3.79 cfs 0.181afPond224P: 224
Outflow=0.00 cfs 0.000 af
Total Runoff Area = 73.640 ac Runoff Volume = 7.931 af Average Runoff Depth = 1.29"
100.00% Pervious = 73.640 ac 0.00% Impervious = 0.000 ac
Type II 24-hr 1 yr Rainfall=3.02"Site ContractorY10A
Printed 2/12/2018PreparedbyAECOM
Page7HydroCAD® 10.00-16 s/n 04851 © 2015 HydroCAD Software Solutions LLC
Summary for Subcatchment 121S: Pre Dev't
Runoff = 20.44 cfs @ 12.24 hrs, Volume= 1.977 af, Depth> 0.96"
Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-24.00 hrs, dt= 0.03 hrs
Type II 24-hr 1 yr Rainfall=3.02"
Area (ac) CN Description
24.590 75
24.590 100.00% Pervious Area
Tc Length Slope Velocity Capacity Description
min) (feet) (ft/ft) (ft/sec) (cfs)
6.7 165 0.0212 0.41 Sheet Flow,
Cultivated: Residue<=20% n= 0.060 P2= 3.36"
1.8 106 0.0038 0.99 Shallow Concentrated Flow,
Unpaved Kv= 16.1 fps
0.4 150 0.0220 5.84 70.07 Channel Flow,
Area= 12.0 sf Perim= 11.0' r= 1.09' n= 0.040
0.1 24 0.0083 3.73 26.33 Pipe Channel,
36.0" Round Area= 7.1 sf Perim= 9.4' r= 0.75'
n= 0.030 Corrugated metal
9.9 384 0.0016 0.64 Shallow Concentrated Flow,
Unpaved Kv= 16.1 fps
0.9 32 0.0063 0.62 0.03 Pipe Channel,
3.0" Round Area= 0.0 sf Perim= 0.8' r= 0.06'
n= 0.030 Corrugated metal
7.8 384 0.0026 0.82 Shallow Concentrated Flow,
Unpaved Kv= 16.1 fps
27.6 1,245 Total
Type II 24-hr 1 yr Rainfall=3.02"Site ContractorY10A
Printed 2/12/2018PreparedbyAECOM
Page8HydroCAD® 10.00-16 s/n 04851 © 2015 HydroCAD Software Solutions LLC
Subcatchment 121S: Pre Dev't
Runoff
Hydrograph
Time (hours)
242220181614121086420Flow (
cfs)
22
20
18
16
14
12
10
8
6
4
2
0 Type II 24-
hr 1 yr Rainfall=3.
02"Runoff Area=24.590
ac Runoff Volume=1.977
af Runoff Depth>0.
96"Flow Length=1,
245'Tc=27.6
min CN=
75 20.44
Type II 24-hr 1 yr Rainfall=3.02"Site ContractorY10A
Printed 2/12/2018PreparedbyAECOM
Page9HydroCAD® 10.00-16 s/n 04851 © 2015 HydroCAD Software Solutions LLC
Hydrograph for Subcatchment 121S: Pre Dev't
Time
hours)
Precip.
inches)
Excess
inches)
Runoff
cfs)
0.00 0.00 0.00 0.00
0.30 0.01 0.00 0.00
0.60 0.02 0.00 0.00
0.90 0.03 0.00 0.00
1.20 0.04 0.00 0.00
1.50 0.05 0.00 0.00
1.80 0.06 0.00 0.00
2.10 0.07 0.00 0.00
2.40 0.08 0.00 0.00
2.70 0.09 0.00 0.00
3.00 0.10 0.00 0.00
3.30 0.12 0.00 0.00
3.60 0.13 0.00 0.00
3.90 0.14 0.00 0.00
4.20 0.15 0.00 0.00
4.50 0.17 0.00 0.00
4.80 0.18 0.00 0.00
5.10 0.20 0.00 0.00
5.40 0.21 0.00 0.00
5.70 0.23 0.00 0.00
6.00 0.24 0.00 0.00
6.30 0.26 0.00 0.00
6.60 0.28 0.00 0.00
6.90 0.29 0.00 0.00
7.20 0.31 0.00 0.00
7.50 0.33 0.00 0.00
7.80 0.35 0.00 0.00
8.10 0.37 0.00 0.00
8.40 0.39 0.00 0.00
8.70 0.42 0.00 0.00
9.00 0.44 0.00 0.00
9.30 0.47 0.00 0.00
9.60 0.50 0.00 0.00
9.90 0.53 0.00 0.00
10.20 0.57 0.00 0.00
10.50 0.62 0.00 0.00
10.80 0.67 0.00 0.00
11.10 0.73 0.00 0.02
11.40 0.82 0.01 0.16
11.70 1.07 0.04 0.64
12.00 2.00 0.38 7.83
12.30 2.15 0.46 19.39
12.60 2.25 0.51 8.78
12.90 2.31 0.54 4.65
13.20 2.37 0.57 3.21
13.50 2.41 0.60 2.53
13.80 2.45 0.62 2.16
14.10 2.49 0.64 1.88
14.40 2.52 0.66 1.66
14.70 2.55 0.68 1.55
15.00 2.58 0.70 1.46
15.30 2.60 0.71 1.37
15.60 2.63 0.73 1.29
Time
hours)
Precip.
inches)
Excess
inches)
Runoff
cfs)
15.90 2.65 0.74 1.20
16.20 2.67 0.75 1.12
16.50 2.69 0.77 1.05
16.80 2.71 0.78 1.01
17.10 2.73 0.79 0.98
17.40 2.75 0.80 0.95
17.70 2.76 0.81 0.92
18.00 2.78 0.82 0.89
18.30 2.80 0.83 0.86
18.60 2.81 0.84 0.82
18.90 2.83 0.85 0.79
19.20 2.84 0.86 0.76
19.50 2.85 0.87 0.73
19.80 2.87 0.87 0.69
20.10 2.88 0.88 0.66
20.40 2.89 0.89 0.63
20.70 2.90 0.90 0.62
21.00 2.91 0.90 0.61
21.30 2.92 0.91 0.60
21.60 2.94 0.92 0.60
21.90 2.95 0.93 0.59
22.20 2.96 0.93 0.59
22.50 2.97 0.94 0.58
22.80 2.98 0.95 0.57
23.10 2.99 0.95 0.57
23.40 3.00 0.96 0.56
23.70 3.01 0.97 0.56
24.00 3.02 0.97 0.55
Type II 24-hr 1 yr Rainfall=3.02"Site ContractorY10A
Printed 2/12/2018PreparedbyAECOM
Page10HydroCAD® 10.00-16 s/n 04851 © 2015 HydroCAD Software Solutions LLC
Summary for Subcatchment 122S: Pre Dev't
Runoff = 6.84 cfs @ 12.03 hrs, Volume= 0.385 af, Depth> 0.87"
Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-24.00 hrs, dt= 0.03 hrs
Type II 24-hr 1 yr Rainfall=3.02"
Area (ac) CN Description
5.330 73
5.330 100.00% Pervious Area
Tc Length Slope Velocity Capacity Description
min) (feet) (ft/ft) (ft/sec) (cfs)
10.0 Direct Entry, Direct
Subcatchment 122S: Pre Dev't
Runoff
Hydrograph
Time (hours)
242220181614121086420Flow (
cfs)
7
6
5
4
3
2
1
0 Type II 24-
hr 1 yr Rainfall=3.
02"Runoff Area=5.330
ac Runoff Volume=0.385
af Runoff Depth>0.
87"Tc=10.0
min CN=
73 6.84
Type II 24-hr 1 yr Rainfall=3.02"Site ContractorY10A
Printed 2/12/2018PreparedbyAECOM
Page11HydroCAD® 10.00-16 s/n 04851 © 2015 HydroCAD Software Solutions LLC
Hydrograph for Subcatchment 122S: Pre Dev't
Time
hours)
Precip.
inches)
Excess
inches)
Runoff
cfs)
0.00 0.00 0.00 0.00
0.30 0.01 0.00 0.00
0.60 0.02 0.00 0.00
0.90 0.03 0.00 0.00
1.20 0.04 0.00 0.00
1.50 0.05 0.00 0.00
1.80 0.06 0.00 0.00
2.10 0.07 0.00 0.00
2.40 0.08 0.00 0.00
2.70 0.09 0.00 0.00
3.00 0.10 0.00 0.00
3.30 0.12 0.00 0.00
3.60 0.13 0.00 0.00
3.90 0.14 0.00 0.00
4.20 0.15 0.00 0.00
4.50 0.17 0.00 0.00
4.80 0.18 0.00 0.00
5.10 0.20 0.00 0.00
5.40 0.21 0.00 0.00
5.70 0.23 0.00 0.00
6.00 0.24 0.00 0.00
6.30 0.26 0.00 0.00
6.60 0.28 0.00 0.00
6.90 0.29 0.00 0.00
7.20 0.31 0.00 0.00
7.50 0.33 0.00 0.00
7.80 0.35 0.00 0.00
8.10 0.37 0.00 0.00
8.40 0.39 0.00 0.00
8.70 0.42 0.00 0.00
9.00 0.44 0.00 0.00
9.30 0.47 0.00 0.00
9.60 0.50 0.00 0.00
9.90 0.53 0.00 0.00
10.20 0.57 0.00 0.00
10.50 0.62 0.00 0.00
10.80 0.67 0.00 0.00
11.10 0.73 0.00 0.00
11.40 0.82 0.00 0.03
11.70 1.07 0.03 0.37
12.00 2.00 0.32 6.51
12.30 2.15 0.39 1.45
12.60 2.25 0.44 0.79
12.90 2.31 0.47 0.60
13.20 2.37 0.50 0.50
13.50 2.41 0.52 0.43
13.80 2.45 0.54 0.38
14.10 2.49 0.56 0.33
14.40 2.52 0.58 0.31
14.70 2.55 0.59 0.29
15.00 2.58 0.61 0.28
15.30 2.60 0.62 0.26
15.60 2.63 0.64 0.24
Time
hours)
Precip.
inches)
Excess
inches)
Runoff
cfs)
15.90 2.65 0.65 0.23
16.20 2.67 0.66 0.21
16.50 2.69 0.67 0.20
16.80 2.71 0.69 0.20
17.10 2.73 0.70 0.19
17.40 2.75 0.71 0.19
17.70 2.76 0.72 0.18
18.00 2.78 0.73 0.17
18.30 2.80 0.74 0.17
18.60 2.81 0.74 0.16
18.90 2.83 0.75 0.15
19.20 2.84 0.76 0.15
19.50 2.85 0.77 0.14
19.80 2.87 0.78 0.13
20.10 2.88 0.78 0.13
20.40 2.89 0.79 0.13
20.70 2.90 0.80 0.12
21.00 2.91 0.80 0.12
21.30 2.92 0.81 0.12
21.60 2.94 0.82 0.12
21.90 2.95 0.82 0.12
22.20 2.96 0.83 0.12
22.50 2.97 0.84 0.12
22.80 2.98 0.84 0.12
23.10 2.99 0.85 0.11
23.40 3.00 0.86 0.11
23.70 3.01 0.86 0.11
24.00 3.02 0.87 0.11
Type II 24-hr 1 yr Rainfall=3.02"Site ContractorY10A
Printed 2/12/2018PreparedbyAECOM
Page12HydroCAD® 10.00-16 s/n 04851 © 2015 HydroCAD Software Solutions LLC
Summary for Subcatchment 123S: Pre Dev't
Runoff = 2.52 cfs @ 12.27 hrs, Volume= 0.266 af, Depth> 0.86"
Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-24.00 hrs, dt= 0.03 hrs
Type II 24-hr 1 yr Rainfall=3.02"
Area (ac) CN Description
3.710 73
3.710 100.00% Pervious Area
Tc Length Slope Velocity Capacity Description
min) (feet) (ft/ft) (ft/sec) (cfs)
30.0 Direct Entry,
Subcatchment 123S: Pre Dev't
Runoff
Hydrograph
Time (hours)
242220181614121086420Flow (
cfs)
2
1
0 Type II 24-
hr 1 yr Rainfall=3.
02"Runoff Area=3.710
ac Runoff Volume=0.266
af Runoff Depth>0.
86"Tc=30.0
min CN=
73 2.52
Type II 24-hr 1 yr Rainfall=3.02"Site ContractorY10A
Printed 2/12/2018PreparedbyAECOM
Page13HydroCAD® 10.00-16 s/n 04851 © 2015 HydroCAD Software Solutions LLC
Hydrograph for Subcatchment 123S: Pre Dev't
Time
hours)
Precip.
inches)
Excess
inches)
Runoff
cfs)
0.00 0.00 0.00 0.00
0.30 0.01 0.00 0.00
0.60 0.02 0.00 0.00
0.90 0.03 0.00 0.00
1.20 0.04 0.00 0.00
1.50 0.05 0.00 0.00
1.80 0.06 0.00 0.00
2.10 0.07 0.00 0.00
2.40 0.08 0.00 0.00
2.70 0.09 0.00 0.00
3.00 0.10 0.00 0.00
3.30 0.12 0.00 0.00
3.60 0.13 0.00 0.00
3.90 0.14 0.00 0.00
4.20 0.15 0.00 0.00
4.50 0.17 0.00 0.00
4.80 0.18 0.00 0.00
5.10 0.20 0.00 0.00
5.40 0.21 0.00 0.00
5.70 0.23 0.00 0.00
6.00 0.24 0.00 0.00
6.30 0.26 0.00 0.00
6.60 0.28 0.00 0.00
6.90 0.29 0.00 0.00
7.20 0.31 0.00 0.00
7.50 0.33 0.00 0.00
7.80 0.35 0.00 0.00
8.10 0.37 0.00 0.00
8.40 0.39 0.00 0.00
8.70 0.42 0.00 0.00
9.00 0.44 0.00 0.00
9.30 0.47 0.00 0.00
9.60 0.50 0.00 0.00
9.90 0.53 0.00 0.00
10.20 0.57 0.00 0.00
10.50 0.62 0.00 0.00
10.80 0.67 0.00 0.00
11.10 0.73 0.00 0.00
11.40 0.82 0.00 0.00
11.70 1.07 0.03 0.04
12.00 2.00 0.32 0.78
12.30 2.15 0.39 2.50
12.60 2.25 0.44 1.29
12.90 2.31 0.47 0.69
13.20 2.37 0.50 0.47
13.50 2.41 0.52 0.36
13.80 2.45 0.54 0.31
14.10 2.49 0.56 0.27
14.40 2.52 0.58 0.24
14.70 2.55 0.59 0.22
15.00 2.58 0.61 0.21
15.30 2.60 0.62 0.19
15.60 2.63 0.64 0.18
Time
hours)
Precip.
inches)
Excess
inches)
Runoff
cfs)
15.90 2.65 0.65 0.17
16.20 2.67 0.66 0.16
16.50 2.69 0.67 0.15
16.80 2.71 0.69 0.14
17.10 2.73 0.70 0.14
17.40 2.75 0.71 0.13
17.70 2.76 0.72 0.13
18.00 2.78 0.73 0.13
18.30 2.80 0.74 0.12
18.60 2.81 0.74 0.12
18.90 2.83 0.75 0.11
19.20 2.84 0.76 0.11
19.50 2.85 0.77 0.10
19.80 2.87 0.78 0.10
20.10 2.88 0.78 0.09
20.40 2.89 0.79 0.09
20.70 2.90 0.80 0.09
21.00 2.91 0.80 0.09
21.30 2.92 0.81 0.09
21.60 2.94 0.82 0.08
21.90 2.95 0.82 0.08
22.20 2.96 0.83 0.08
22.50 2.97 0.84 0.08
22.80 2.98 0.84 0.08
23.10 2.99 0.85 0.08
23.40 3.00 0.86 0.08
23.70 3.01 0.86 0.08
24.00 3.02 0.87 0.08
Type II 24-hr 1 yr Rainfall=3.02"Site ContractorY10A
Printed 2/12/2018PreparedbyAECOM
Page14HydroCAD® 10.00-16 s/n 04851 © 2015 HydroCAD Software Solutions LLC
Summary for Subcatchment 124S: Pre Dev't
Runoff = 4.09 cfs @ 12.03 hrs, Volume= 0.230 af, Depth> 0.87"
Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-24.00 hrs, dt= 0.03 hrs
Type II 24-hr 1 yr Rainfall=3.02"
Area (ac) CN Description
3.190 73
3.190 100.00% Pervious Area
Tc Length Slope Velocity Capacity Description
min) (feet) (ft/ft) (ft/sec) (cfs)
10.0 Direct Entry,
Subcatchment 124S: Pre Dev't
Runoff
Hydrograph
Time (hours)
242220181614121086420Flow (
cfs)
4
3
2
1
0 Type II 24-
hr 1 yr Rainfall=3.
02"Runoff Area=3.190
ac Runoff Volume=0.230
af Runoff Depth>0.
87"Tc=10.0
min CN=
73 4.09
Type II 24-hr 1 yr Rainfall=3.02"Site ContractorY10A
Printed 2/12/2018PreparedbyAECOM
Page15HydroCAD® 10.00-16 s/n 04851 © 2015 HydroCAD Software Solutions LLC
Hydrograph for Subcatchment 124S: Pre Dev't
Time
hours)
Precip.
inches)
Excess
inches)
Runoff
cfs)
0.00 0.00 0.00 0.00
0.30 0.01 0.00 0.00
0.60 0.02 0.00 0.00
0.90 0.03 0.00 0.00
1.20 0.04 0.00 0.00
1.50 0.05 0.00 0.00
1.80 0.06 0.00 0.00
2.10 0.07 0.00 0.00
2.40 0.08 0.00 0.00
2.70 0.09 0.00 0.00
3.00 0.10 0.00 0.00
3.30 0.12 0.00 0.00
3.60 0.13 0.00 0.00
3.90 0.14 0.00 0.00
4.20 0.15 0.00 0.00
4.50 0.17 0.00 0.00
4.80 0.18 0.00 0.00
5.10 0.20 0.00 0.00
5.40 0.21 0.00 0.00
5.70 0.23 0.00 0.00
6.00 0.24 0.00 0.00
6.30 0.26 0.00 0.00
6.60 0.28 0.00 0.00
6.90 0.29 0.00 0.00
7.20 0.31 0.00 0.00
7.50 0.33 0.00 0.00
7.80 0.35 0.00 0.00
8.10 0.37 0.00 0.00
8.40 0.39 0.00 0.00
8.70 0.42 0.00 0.00
9.00 0.44 0.00 0.00
9.30 0.47 0.00 0.00
9.60 0.50 0.00 0.00
9.90 0.53 0.00 0.00
10.20 0.57 0.00 0.00
10.50 0.62 0.00 0.00
10.80 0.67 0.00 0.00
11.10 0.73 0.00 0.00
11.40 0.82 0.00 0.02
11.70 1.07 0.03 0.22
12.00 2.00 0.32 3.90
12.30 2.15 0.39 0.87
12.60 2.25 0.44 0.47
12.90 2.31 0.47 0.36
13.20 2.37 0.50 0.30
13.50 2.41 0.52 0.26
13.80 2.45 0.54 0.23
14.10 2.49 0.56 0.20
14.40 2.52 0.58 0.19
14.70 2.55 0.59 0.18
15.00 2.58 0.61 0.17
15.30 2.60 0.62 0.16
15.60 2.63 0.64 0.15
Time
hours)
Precip.
inches)
Excess
inches)
Runoff
cfs)
15.90 2.65 0.65 0.14
16.20 2.67 0.66 0.13
16.50 2.69 0.67 0.12
16.80 2.71 0.69 0.12
17.10 2.73 0.70 0.12
17.40 2.75 0.71 0.11
17.70 2.76 0.72 0.11
18.00 2.78 0.73 0.10
18.30 2.80 0.74 0.10
18.60 2.81 0.74 0.10
18.90 2.83 0.75 0.09
19.20 2.84 0.76 0.09
19.50 2.85 0.77 0.08
19.80 2.87 0.78 0.08
20.10 2.88 0.78 0.08
20.40 2.89 0.79 0.07
20.70 2.90 0.80 0.07
21.00 2.91 0.80 0.07
21.30 2.92 0.81 0.07
21.60 2.94 0.82 0.07
21.90 2.95 0.82 0.07
22.20 2.96 0.83 0.07
22.50 2.97 0.84 0.07
22.80 2.98 0.84 0.07
23.10 2.99 0.85 0.07
23.40 3.00 0.86 0.07
23.70 3.01 0.86 0.07
24.00 3.02 0.87 0.07
Type II 24-hr 1 yr Rainfall=3.02"Site ContractorY10A
Printed 2/12/2018PreparedbyAECOM
Page16HydroCAD® 10.00-16 s/n 04851 © 2015 HydroCAD Software Solutions LLC
Summary for Subcatchment 221S: Post CY (s)
Runoff = 57.39 cfs @ 12.06 hrs, Volume= 3.587 af, Depth> 1.75"
Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-24.00 hrs, dt= 0.03 hrs
Type II 24-hr 1 yr Rainfall=3.02"
Area (ac) CN Description
24.590 87
24.590 100.00% Pervious Area
Tc Length Slope Velocity Capacity Description
min) (feet) (ft/ft) (ft/sec) (cfs)
1.7 165 0.0212 1.59 Sheet Flow,
Smooth surfaces n= 0.011 P2= 3.36"
1.4 106 0.0038 1.25 Shallow Concentrated Flow,
Paved Kv= 20.3 fps
0.4 150 0.0220 6.67 80.08 Channel Flow,
Area= 12.0 sf Perim= 11.0' r= 1.09' n= 0.035
0.6 24 0.0083 0.71 0.03 Pipe Channel,
3.0" Round Area= 0.0 sf Perim= 0.8' r= 0.06'
n= 0.030 Corrugated metal
7.9 384 0.0016 0.81 Shallow Concentrated Flow,
Paved Kv= 20.3 fps
0.9 32 0.0063 0.62 0.03 Pipe Channel,
3.0" Round Area= 0.0 sf Perim= 0.8' r= 0.06'
n= 0.030
1.2 118 0.0110 1.69 Shallow Concentrated Flow,
Unpaved Kv= 16.1 fps
14.1 979 Total
Type II 24-hr 1 yr Rainfall=3.02"Site ContractorY10A
Printed 2/12/2018PreparedbyAECOM
Page17HydroCAD® 10.00-16 s/n 04851 © 2015 HydroCAD Software Solutions LLC
Subcatchment 221S: Post CY (s)
Runoff
Hydrograph
Time (hours)
242220181614121086420Flow (
cfs)
60
55
50
45
40
35
30
25
20
15
10
5
0 Type II 24-
hr 1 yr Rainfall=3.
02"Runoff Area=24.590
ac Runoff Volume=3.587
af Runoff Depth>1.
75"Flow Length=
979'Tc=14.1
min CN=
87 57.39
Type II 24-hr 1 yr Rainfall=3.02"Site ContractorY10A
Printed 2/12/2018PreparedbyAECOM
Page18HydroCAD® 10.00-16 s/n 04851 © 2015 HydroCAD Software Solutions LLC
Hydrograph for Subcatchment 221S: Post CY (s)
Time
hours)
Precip.
inches)
Excess
inches)
Runoff
cfs)
0.00 0.00 0.00 0.00
0.30 0.01 0.00 0.00
0.60 0.02 0.00 0.00
0.90 0.03 0.00 0.00
1.20 0.04 0.00 0.00
1.50 0.05 0.00 0.00
1.80 0.06 0.00 0.00
2.10 0.07 0.00 0.00
2.40 0.08 0.00 0.00
2.70 0.09 0.00 0.00
3.00 0.10 0.00 0.00
3.30 0.12 0.00 0.00
3.60 0.13 0.00 0.00
3.90 0.14 0.00 0.00
4.20 0.15 0.00 0.00
4.50 0.17 0.00 0.00
4.80 0.18 0.00 0.00
5.10 0.20 0.00 0.00
5.40 0.21 0.00 0.00
5.70 0.23 0.00 0.00
6.00 0.24 0.00 0.00
6.30 0.26 0.00 0.00
6.60 0.28 0.00 0.00
6.90 0.29 0.00 0.00
7.20 0.31 0.00 0.00
7.50 0.33 0.00 0.04
7.80 0.35 0.00 0.07
8.10 0.37 0.00 0.12
8.40 0.39 0.01 0.17
8.70 0.42 0.01 0.24
9.00 0.44 0.01 0.33
9.30 0.47 0.02 0.42
9.60 0.50 0.02 0.49
9.90 0.53 0.03 0.61
10.20 0.57 0.04 0.79
10.50 0.62 0.06 1.03
10.80 0.67 0.07 1.37
11.10 0.73 0.10 1.87
11.40 0.82 0.13 2.79
11.70 1.07 0.26 6.71
12.00 2.00 0.91 49.89
12.30 2.15 1.03 17.57
12.60 2.25 1.10 7.15
12.90 2.31 1.16 4.78
13.20 2.37 1.20 3.85
13.50 2.41 1.24 3.28
13.80 2.45 1.27 2.83
14.10 2.49 1.30 2.46
14.40 2.52 1.33 2.24
14.70 2.55 1.35 2.11
15.00 2.58 1.38 1.99
15.30 2.60 1.40 1.86
15.60 2.63 1.42 1.73
Time
hours)
Precip.
inches)
Excess
inches)
Runoff
cfs)
15.90 2.65 1.44 1.60
16.20 2.67 1.46 1.48
16.50 2.69 1.47 1.42
16.80 2.71 1.49 1.38
17.10 2.73 1.51 1.33
17.40 2.75 1.52 1.28
17.70 2.76 1.54 1.24
18.00 2.78 1.55 1.19
18.30 2.80 1.56 1.14
18.60 2.81 1.58 1.10
18.90 2.83 1.59 1.05
19.20 2.84 1.60 1.00
19.50 2.85 1.61 0.96
19.80 2.87 1.62 0.91
20.10 2.88 1.63 0.86
20.40 2.89 1.64 0.84
20.70 2.90 1.65 0.83
21.00 2.91 1.66 0.82
21.30 2.92 1.67 0.81
21.60 2.94 1.68 0.80
21.90 2.95 1.69 0.79
22.20 2.96 1.70 0.78
22.50 2.97 1.71 0.77
22.80 2.98 1.72 0.76
23.10 2.99 1.73 0.75
23.40 3.00 1.74 0.75
23.70 3.01 1.75 0.74
24.00 3.02 1.76 0.73
Type II 24-hr 1 yr Rainfall=3.02"Site ContractorY10A
Printed 2/12/2018PreparedbyAECOM
Page19HydroCAD® 10.00-16 s/n 04851 © 2015 HydroCAD Software Solutions LLC
Summary for Subcatchment 222S: Post CY (nw)
Runoff = 15.67 cfs @ 11.96 hrs, Volume= 0.712 af, Depth> 1.60"
Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-24.00 hrs, dt= 0.03 hrs
Type II 24-hr 1 yr Rainfall=3.02"
Area (ac) CN Description
5.330 85
5.330 100.00% Pervious Area
Tc Length Slope Velocity Capacity Description
min) (feet) (ft/ft) (ft/sec) (cfs)
5.0 Direct Entry,
Subcatchment 222S: Post CY (nw)
Runoff
Hydrograph
Time (hours)
242220181614121086420Flow (
cfs)
16
14
12
10
8
6
4
2
0 Type II 24-
hr 1 yr Rainfall=3.
02"Runoff Area=5.330
ac Runoff Volume=0.712
af Runoff Depth>1.
60"Tc=5.0
min CN=
85 15.67
Type II 24-hr 1 yr Rainfall=3.02"Site ContractorY10A
Printed 2/12/2018PreparedbyAECOM
Page20HydroCAD® 10.00-16 s/n 04851 © 2015 HydroCAD Software Solutions LLC
Hydrograph for Subcatchment 222S: Post CY (nw)
Time
hours)
Precip.
inches)
Excess
inches)
Runoff
cfs)
0.00 0.00 0.00 0.00
0.30 0.01 0.00 0.00
0.60 0.02 0.00 0.00
0.90 0.03 0.00 0.00
1.20 0.04 0.00 0.00
1.50 0.05 0.00 0.00
1.80 0.06 0.00 0.00
2.10 0.07 0.00 0.00
2.40 0.08 0.00 0.00
2.70 0.09 0.00 0.00
3.00 0.10 0.00 0.00
3.30 0.12 0.00 0.00
3.60 0.13 0.00 0.00
3.90 0.14 0.00 0.00
4.20 0.15 0.00 0.00
4.50 0.17 0.00 0.00
4.80 0.18 0.00 0.00
5.10 0.20 0.00 0.00
5.40 0.21 0.00 0.00
5.70 0.23 0.00 0.00
6.00 0.24 0.00 0.00
6.30 0.26 0.00 0.00
6.60 0.28 0.00 0.00
6.90 0.29 0.00 0.00
7.20 0.31 0.00 0.00
7.50 0.33 0.00 0.00
7.80 0.35 0.00 0.00
8.10 0.37 0.00 0.00
8.40 0.39 0.00 0.01
8.70 0.42 0.00 0.03
9.00 0.44 0.00 0.04
9.30 0.47 0.01 0.06
9.60 0.50 0.01 0.08
9.90 0.53 0.02 0.10
10.20 0.57 0.02 0.14
10.50 0.62 0.03 0.19
10.80 0.67 0.05 0.27
11.10 0.73 0.07 0.38
11.40 0.82 0.10 0.60
11.70 1.07 0.21 3.00
12.00 2.00 0.80 13.51
12.30 2.15 0.91 1.83
12.60 2.25 0.98 1.08
12.90 2.31 1.03 0.88
13.20 2.37 1.07 0.73
13.50 2.41 1.11 0.63
13.80 2.45 1.14 0.55
14.10 2.49 1.17 0.48
14.40 2.52 1.19 0.45
14.70 2.55 1.22 0.42
15.00 2.58 1.24 0.40
15.30 2.60 1.26 0.37
15.60 2.63 1.28 0.35
Time
hours)
Precip.
inches)
Excess
inches)
Runoff
cfs)
15.90 2.65 1.30 0.32
16.20 2.67 1.32 0.30
16.50 2.69 1.33 0.29
16.80 2.71 1.35 0.28
17.10 2.73 1.36 0.27
17.40 2.75 1.38 0.26
17.70 2.76 1.39 0.25
18.00 2.78 1.41 0.24
18.30 2.80 1.42 0.23
18.60 2.81 1.43 0.22
18.90 2.83 1.44 0.21
19.20 2.84 1.46 0.20
19.50 2.85 1.47 0.19
19.80 2.87 1.48 0.18
20.10 2.88 1.49 0.18
20.40 2.89 1.50 0.17
20.70 2.90 1.51 0.17
21.00 2.91 1.52 0.17
21.30 2.92 1.53 0.17
21.60 2.94 1.53 0.17
21.90 2.95 1.54 0.16
22.20 2.96 1.55 0.16
22.50 2.97 1.56 0.16
22.80 2.98 1.57 0.16
23.10 2.99 1.58 0.16
23.40 3.00 1.59 0.15
23.70 3.01 1.60 0.15
24.00 3.02 1.61 0.15
Type II 24-hr 1 yr Rainfall=3.02"Site ContractorY10A
Printed 2/12/2018PreparedbyAECOM
Page21HydroCAD® 10.00-16 s/n 04851 © 2015 HydroCAD Software Solutions LLC
Summary for Subcatchment 223S: Post CY (ne)
Runoff = 12.76 cfs @ 11.96 hrs, Volume= 0.592 af, Depth> 1.92"
Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-24.00 hrs, dt= 0.03 hrs
Type II 24-hr 1 yr Rainfall=3.02"
Area (ac) CN Description
3.710 89
3.710 100.00% Pervious Area
Tc Length Slope Velocity Capacity Description
min) (feet) (ft/ft) (ft/sec) (cfs)
5.0 Direct Entry,
Subcatchment 223S: Post CY (ne)
Runoff
Hydrograph
Time (hours)
242220181614121086420Flow (
cfs)
14
12
10
8
6
4
2
0 Type II 24-
hr 1 yr Rainfall=3.
02"Runoff Area=3.710
ac Runoff Volume=0.592
af Runoff Depth>1.
92"Tc=5.0
min CN=
89 12.76
Type II 24-hr 1 yr Rainfall=3.02"Site ContractorY10A
Printed 2/12/2018PreparedbyAECOM
Page22HydroCAD® 10.00-16 s/n 04851 © 2015 HydroCAD Software Solutions LLC
Hydrograph for Subcatchment 223S: Post CY (ne)
Time
hours)
Precip.
inches)
Excess
inches)
Runoff
cfs)
0.00 0.00 0.00 0.00
0.30 0.01 0.00 0.00
0.60 0.02 0.00 0.00
0.90 0.03 0.00 0.00
1.20 0.04 0.00 0.00
1.50 0.05 0.00 0.00
1.80 0.06 0.00 0.00
2.10 0.07 0.00 0.00
2.40 0.08 0.00 0.00
2.70 0.09 0.00 0.00
3.00 0.10 0.00 0.00
3.30 0.12 0.00 0.00
3.60 0.13 0.00 0.00
3.90 0.14 0.00 0.00
4.20 0.15 0.00 0.00
4.50 0.17 0.00 0.00
4.80 0.18 0.00 0.00
5.10 0.20 0.00 0.00
5.40 0.21 0.00 0.00
5.70 0.23 0.00 0.00
6.00 0.24 0.00 0.00
6.30 0.26 0.00 0.00
6.60 0.28 0.00 0.01
6.90 0.29 0.00 0.01
7.20 0.31 0.00 0.02
7.50 0.33 0.01 0.03
7.80 0.35 0.01 0.03
8.10 0.37 0.01 0.04
8.40 0.39 0.02 0.05
8.70 0.42 0.02 0.07
9.00 0.44 0.03 0.09
9.30 0.47 0.03 0.10
9.60 0.50 0.04 0.11
9.90 0.53 0.05 0.14
10.20 0.57 0.07 0.18
10.50 0.62 0.08 0.23
10.80 0.67 0.11 0.30
11.10 0.73 0.14 0.40
11.40 0.82 0.18 0.61
11.70 1.07 0.33 2.79
12.00 2.00 1.03 10.85
12.30 2.15 1.16 1.43
12.60 2.25 1.23 0.84
12.90 2.31 1.29 0.68
13.20 2.37 1.34 0.56
13.50 2.41 1.38 0.48
13.80 2.45 1.41 0.42
14.10 2.49 1.44 0.36
14.40 2.52 1.47 0.34
14.70 2.55 1.50 0.32
15.00 2.58 1.52 0.30
15.30 2.60 1.55 0.28
15.60 2.63 1.57 0.26
Time
hours)
Precip.
inches)
Excess
inches)
Runoff
cfs)
15.90 2.65 1.59 0.24
16.20 2.67 1.61 0.23
16.50 2.69 1.62 0.22
16.80 2.71 1.64 0.21
17.10 2.73 1.66 0.21
17.40 2.75 1.67 0.20
17.70 2.76 1.69 0.19
18.00 2.78 1.70 0.18
18.30 2.80 1.72 0.18
18.60 2.81 1.73 0.17
18.90 2.83 1.74 0.16
19.20 2.84 1.76 0.15
19.50 2.85 1.77 0.15
19.80 2.87 1.78 0.14
20.10 2.88 1.79 0.13
20.40 2.89 1.80 0.13
20.70 2.90 1.81 0.13
21.00 2.91 1.82 0.13
21.30 2.92 1.83 0.13
21.60 2.94 1.84 0.12
21.90 2.95 1.85 0.12
22.20 2.96 1.86 0.12
22.50 2.97 1.87 0.12
22.80 2.98 1.88 0.12
23.10 2.99 1.89 0.12
23.40 3.00 1.90 0.12
23.70 3.01 1.91 0.11
24.00 3.02 1.92 0.11
Type II 24-hr 1 yr Rainfall=3.02"Site ContractorY10A
Printed 2/12/2018PreparedbyAECOM
Page23HydroCAD® 10.00-16 s/n 04851 © 2015 HydroCAD Software Solutions LLC
Summary for Subcatchment 224S: Post CY (se)
Runoff = 3.79 cfs @ 11.97 hrs, Volume= 0.181 af, Depth> 0.68"
Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-24.00 hrs, dt= 0.03 hrs
Type II 24-hr 1 yr Rainfall=3.02"
Area (ac) CN Description
3.190 69
3.190 100.00% Pervious Area
Tc Length Slope Velocity Capacity Description
min) (feet) (ft/ft) (ft/sec) (cfs)
5.0 Direct Entry,
Subcatchment 224S: Post CY (se)
Runoff
Hydrograph
Time (hours)
242220181614121086420Flow (
cfs)
4
3
2
1
0 Type II 24-
hr 1 yr Rainfall=3.
02"Runoff Area=3.190
ac Runoff Volume=0.181
af Runoff Depth>0.
68"Tc=5.0
min CN=
69 3.79
Type II 24-hr 1 yr Rainfall=3.02"Site ContractorY10A
Printed 2/12/2018PreparedbyAECOM
Page24HydroCAD® 10.00-16 s/n 04851 © 2015 HydroCAD Software Solutions LLC
Hydrograph for Subcatchment 224S: Post CY (se)
Time
hours)
Precip.
inches)
Excess
inches)
Runoff
cfs)
0.00 0.00 0.00 0.00
0.30 0.01 0.00 0.00
0.60 0.02 0.00 0.00
0.90 0.03 0.00 0.00
1.20 0.04 0.00 0.00
1.50 0.05 0.00 0.00
1.80 0.06 0.00 0.00
2.10 0.07 0.00 0.00
2.40 0.08 0.00 0.00
2.70 0.09 0.00 0.00
3.00 0.10 0.00 0.00
3.30 0.12 0.00 0.00
3.60 0.13 0.00 0.00
3.90 0.14 0.00 0.00
4.20 0.15 0.00 0.00
4.50 0.17 0.00 0.00
4.80 0.18 0.00 0.00
5.10 0.20 0.00 0.00
5.40 0.21 0.00 0.00
5.70 0.23 0.00 0.00
6.00 0.24 0.00 0.00
6.30 0.26 0.00 0.00
6.60 0.28 0.00 0.00
6.90 0.29 0.00 0.00
7.20 0.31 0.00 0.00
7.50 0.33 0.00 0.00
7.80 0.35 0.00 0.00
8.10 0.37 0.00 0.00
8.40 0.39 0.00 0.00
8.70 0.42 0.00 0.00
9.00 0.44 0.00 0.00
9.30 0.47 0.00 0.00
9.60 0.50 0.00 0.00
9.90 0.53 0.00 0.00
10.20 0.57 0.00 0.00
10.50 0.62 0.00 0.00
10.80 0.67 0.00 0.00
11.10 0.73 0.00 0.00
11.40 0.82 0.00 0.00
11.70 1.07 0.01 0.12
12.00 2.00 0.22 3.49
12.30 2.15 0.27 0.56
12.60 2.25 0.31 0.34
12.90 2.31 0.34 0.29
13.20 2.37 0.36 0.24
13.50 2.41 0.38 0.21
13.80 2.45 0.40 0.18
14.10 2.49 0.42 0.16
14.40 2.52 0.43 0.15
14.70 2.55 0.44 0.15
15.00 2.58 0.46 0.14
15.30 2.60 0.47 0.13
15.60 2.63 0.48 0.12
Time
hours)
Precip.
inches)
Excess
inches)
Runoff
cfs)
15.90 2.65 0.49 0.11
16.20 2.67 0.50 0.11
16.50 2.69 0.51 0.10
16.80 2.71 0.52 0.10
17.10 2.73 0.53 0.10
17.40 2.75 0.54 0.10
17.70 2.76 0.55 0.09
18.00 2.78 0.56 0.09
18.30 2.80 0.56 0.09
18.60 2.81 0.57 0.08
18.90 2.83 0.58 0.08
19.20 2.84 0.59 0.08
19.50 2.85 0.59 0.07
19.80 2.87 0.60 0.07
20.10 2.88 0.61 0.07
20.40 2.89 0.61 0.06
20.70 2.90 0.62 0.06
21.00 2.91 0.62 0.06
21.30 2.92 0.63 0.06
21.60 2.94 0.64 0.06
21.90 2.95 0.64 0.06
22.20 2.96 0.65 0.06
22.50 2.97 0.65 0.06
22.80 2.98 0.66 0.06
23.10 2.99 0.66 0.06
23.40 3.00 0.67 0.06
23.70 3.01 0.68 0.06
24.00 3.02 0.68 0.06
Type II 24-hr 1 yr Rainfall=3.02"Site ContractorY10A
Printed 2/12/2018PreparedbyAECOM
Page25HydroCAD® 10.00-16 s/n 04851 © 2015 HydroCAD Software Solutions LLC
Summary for Pond 221P: 221
Inflow Area = 24.590 ac, 0.00% Impervious, Inflow Depth > 1.75" for 1 yr event
Inflow = 57.39 cfs @ 12.06 hrs, Volume= 3.587 af
Outflow = 1.07 cfs @ 18.75 hrs, Volume= 0.476 af, Atten= 98%, Lag= 401.5 min
Primary = 1.07 cfs @ 18.75 hrs, Volume= 0.476 af
Routing by Stor-Ind method, Time Span= 0.00-24.00 hrs, dt= 0.03 hrs
Peak Elev= 93.54' @ 18.75 hrs Surf.Area= 61,293 sf Storage= 136,153 cf
Plug-Flow detention time= 567.2 min calculated for 0.475 af (13% of inflow)
Center-of-Mass det. time= 410.7 min ( 1,234.4 - 823.6 )
Volume Invert Avail.Storage Storage Description
1 91.00' 196,497 cf Custom Stage Data (Prismatic) Listed below (Recalc)
Elevation Surf.Area Inc.Store Cum.Store
feet) (sq-ft) (cubic-feet) (cubic-feet)
91.00 29,222 0 0
91.50 51,128 20,088 20,088
92.00 54,024 26,288 46,376
92.50 56,935 27,740 74,115
93.00 59,864 29,200 103,315
94.00 62,500 61,182 164,497
94.50 65,500 32,000 196,497
Device Routing Invert Outlet Devices
1 Primary 93.50'50.0' long x 5.0' 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 3.50 4.00 4.50 5.00 5.50
Coef. (English) 2.34 2.50 2.70 2.68 2.68 2.66 2.65 2.65 2.65
2.65 2.67 2.66 2.68 2.70 2.74 2.79 2.88
Primary OutFlow Max=1.01 cfs @ 18.75 hrs HW=93.54' (Free Discharge)
1=Broad-Crested Rectangular Weir (Weir Controls 1.01 cfs @ 0.48 fps)
Type II 24-hr 1 yr Rainfall=3.02"Site ContractorY10A
Printed 2/12/2018PreparedbyAECOM
Page26HydroCAD® 10.00-16 s/n 04851 © 2015 HydroCAD Software Solutions LLC
Pond 221P: 221
Inflow
Primary
Hydrograph
Time (hours)
242220181614121086420Flow (
cfs)
60
50
40
30
20
10
0 Inflow Area=24.590
ac Peak Elev=93.
54'Storage=136,153
cf 57.39
cfs 1.07
cfs Pond 221P:
221
Primary Stage-
Discharge Discharge (
cfs)
1301201101009080706050403020100Elevation (
feet)
94
93
92 91 Broad-Crested
Type II 24-hr 1 yr Rainfall=3.02"Site ContractorY10A
Printed 2/12/2018PreparedbyAECOM
Page27HydroCAD® 10.00-16 s/n 04851 © 2015 HydroCAD Software Solutions LLC
Pond 221P: 221
Surface
Storage
Stage-Area-Storage
Storage (cubic-feet)
150,000100,00050,0000
Surface/Horizontal/Wetted Area (sq-ft)
60,00050,00040,00030,00020,00010,0000
Elevation (
feet)
94
93
92 91 Custom
Type II 24-hr 1 yr Rainfall=3.02"Site ContractorY10A
Printed 2/12/2018PreparedbyAECOM
Page28HydroCAD® 10.00-16 s/n 04851 © 2015 HydroCAD Software Solutions LLC
Hydrograph for Pond 221P: 221
Time
hours)
Inflow
cfs)
Storage
cubic-feet)
Elevation
feet)
Primary
cfs)
0.00 0.00 0 91.00 0.00
0.60 0.00 0 91.00 0.00
1.20 0.00 0 91.00 0.00
1.80 0.00 0 91.00 0.00
2.40 0.00 0 91.00 0.00
3.00 0.00 0 91.00 0.00
3.60 0.00 0 91.00 0.00
4.20 0.00 0 91.00 0.00
4.80 0.00 0 91.00 0.00
5.40 0.00 0 91.00 0.00
6.00 0.00 0 91.00 0.00
6.60 0.00 0 91.00 0.00
7.20 0.00 1 91.00 0.00
7.80 0.07 80 91.00 0.00
8.40 0.17 334 91.01 0.00
9.00 0.33 864 91.03 0.00
9.60 0.49 1,769 91.06 0.00
10.20 0.79 3,108 91.10 0.00
10.80 1.37 5,371 91.16 0.00
11.40 2.79 9,566 91.27 0.00
12.00 49.89 38,002 91.84 0.00
12.60 7.15 93,542 92.84 0.00
13.20 3.85 104,264 93.02 0.00
13.80 2.83 111,385 93.13 0.00
14.40 2.24 116,753 93.22 0.00
15.00 1.99 121,316 93.30 0.00
15.60 1.73 125,331 93.36 0.00
16.20 1.48 128,791 93.42 0.00
16.80 1.38 131,864 93.47 0.00
17.40 1.28 134,607 93.52 0.28
18.00 1.19 135,876 93.54 0.92
18.60 1.10 136,147 93.54 1.07
19.20 1.00 136,111 93.54 1.05
19.80 0.91 135,980 93.54 0.98
20.40 0.84 135,828 93.54 0.90
21.00 0.82 135,741 93.54 0.85
21.60 0.80 135,691 93.53 0.82
22.20 0.78 135,653 93.53 0.80
22.80 0.76 135,618 93.53 0.78
23.40 0.75 135,584 93.53 0.76
24.00 0.73 135,550 93.53 0.74
Type II 24-hr 1 yr Rainfall=3.02"Site ContractorY10A
Printed 2/12/2018PreparedbyAECOM
Page29HydroCAD® 10.00-16 s/n 04851 © 2015 HydroCAD Software Solutions LLC
Stage-Discharge for Pond 221P: 221
Elevation
feet)
Primary
cfs)
91.00 0.00
91.02 0.00
91.04 0.00
91.06 0.00
91.08 0.00
91.10 0.00
91.12 0.00
91.14 0.00
91.16 0.00
91.18 0.00
91.20 0.00
91.22 0.00
91.24 0.00
91.26 0.00
91.28 0.00
91.30 0.00
91.32 0.00
91.34 0.00
91.36 0.00
91.38 0.00
91.40 0.00
91.42 0.00
91.44 0.00
91.46 0.00
91.48 0.00
91.50 0.00
91.52 0.00
91.54 0.00
91.56 0.00
91.58 0.00
91.60 0.00
91.62 0.00
91.64 0.00
91.66 0.00
91.68 0.00
91.70 0.00
91.72 0.00
91.74 0.00
91.76 0.00
91.78 0.00
91.80 0.00
91.82 0.00
91.84 0.00
91.86 0.00
91.88 0.00
91.90 0.00
91.92 0.00
91.94 0.00
91.96 0.00
91.98 0.00
92.00 0.00
92.02 0.00
92.04 0.00
Elevation
feet)
Primary
cfs)
92.06 0.00
92.08 0.00
92.10 0.00
92.12 0.00
92.14 0.00
92.16 0.00
92.18 0.00
92.20 0.00
92.22 0.00
92.24 0.00
92.26 0.00
92.28 0.00
92.30 0.00
92.32 0.00
92.34 0.00
92.36 0.00
92.38 0.00
92.40 0.00
92.42 0.00
92.44 0.00
92.46 0.00
92.48 0.00
92.50 0.00
92.52 0.00
92.54 0.00
92.56 0.00
92.58 0.00
92.60 0.00
92.62 0.00
92.64 0.00
92.66 0.00
92.68 0.00
92.70 0.00
92.72 0.00
92.74 0.00
92.76 0.00
92.78 0.00
92.80 0.00
92.82 0.00
92.84 0.00
92.86 0.00
92.88 0.00
92.90 0.00
92.92 0.00
92.94 0.00
92.96 0.00
92.98 0.00
93.00 0.00
93.02 0.00
93.04 0.00
93.06 0.00
93.08 0.00
93.10 0.00
Elevation
feet)
Primary
cfs)
93.12 0.00
93.14 0.00
93.16 0.00
93.18 0.00
93.20 0.00
93.22 0.00
93.24 0.00
93.26 0.00
93.28 0.00
93.30 0.00
93.32 0.00
93.34 0.00
93.36 0.00
93.38 0.00
93.40 0.00
93.42 0.00
93.44 0.00
93.46 0.00
93.48 0.00
93.50 0.00
93.52 0.33
93.54 0.94
93.56 1.72
93.58 2.65
93.60 3.70
93.62 4.86
93.64 6.13
93.66 7.49
93.68 8.94
93.70 10.46
93.72 12.16
93.74 13.94
93.76 15.83
93.78 17.81
93.80 19.88
93.82 22.05
93.84 24.31
93.86 26.65
93.88 29.09
93.90 31.62
93.92 34.30
93.94 37.07
93.96 39.93
93.98 42.90
94.00 45.96
94.02 49.12
94.04 52.38
94.06 55.74
94.08 59.19
94.10 62.74
94.12 65.86
94.14 69.02
94.16 72.22
Elevation
feet)
Primary
cfs)
94.18 75.48
94.20 78.77
94.22 82.11
94.24 85.49
94.26 88.91
94.28 92.38
94.30 95.88
94.32 99.50
94.34 103.16
94.36 106.87
94.38 110.62
94.40 114.41
94.42 118.25
94.44 122.12
94.46 126.04
94.48 130.00
94.50 134.00
Type II 24-hr 1 yr Rainfall=3.02"Site ContractorY10A
Printed 2/12/2018PreparedbyAECOM
Page30HydroCAD® 10.00-16 s/n 04851 © 2015 HydroCAD Software Solutions LLC
Stage-Area-Storage for Pond 221P: 221
Elevation
feet)
Surface
sq-ft)
Storage
cubic-feet)
91.00 29,222 0
91.05 31,413 1,516
91.10 33,603 3,141
91.15 35,794 4,876
91.20 37,984 6,721
91.25 40,175 8,675
91.30 42,366 10,738
91.35 44,556 12,911
91.40 46,747 15,194
91.45 48,937 17,586
91.50 51,128 20,088
91.55 51,418 22,651
91.60 51,707 25,229
91.65 51,997 27,822
91.70 52,286 30,429
91.75 52,576 33,051
91.80 52,866 35,687
91.85 53,155 38,337
91.90 53,445 41,002
91.95 53,734 43,682
92.00 54,024 46,376
92.05 54,315 49,084
92.10 54,606 51,807
92.15 54,897 54,545
92.20 55,188 57,297
92.25 55,480 60,063
92.30 55,771 62,845
92.35 56,062 65,640
92.40 56,353 68,451
92.45 56,644 71,276
92.50 56,935 74,115
92.55 57,228 76,969
92.60 57,521 79,838
92.65 57,814 82,721
92.70 58,107 85,619
92.75 58,400 88,532
92.80 58,692 91,459
92.85 58,985 94,401
92.90 59,278 97,358
92.95 59,571 100,329
93.00 59,864 103,315
93.05 59,996 106,311
93.10 60,128 109,315
93.15 60,259 112,324
93.20 60,391 115,341
93.25 60,523 118,363
93.30 60,655 121,393
93.35 60,787 124,429
93.40 60,918 127,471
93.45 61,050 130,521
93.50 61,182 133,577
93.55 61,314 136,639
93.60 61,446 139,708
Elevation
feet)
Surface
sq-ft)
Storage
cubic-feet)
93.65 61,577 142,783
93.70 61,709 145,866
93.75 61,841 148,954
93.80 61,973 152,050
93.85 62,105 155,152
93.90 62,236 158,260
93.95 62,368 161,375
94.00 62,500 164,497
94.05 62,800 167,629
94.10 63,100 170,777
94.15 63,400 173,940
94.20 63,700 177,117
94.25 64,000 180,310
94.30 64,300 183,517
94.35 64,600 186,739
94.40 64,900 189,977
94.45 65,200 193,230
94.50 65,500 196,497
Type II 24-hr 1 yr Rainfall=3.02"Site ContractorY10A
Printed 2/12/2018PreparedbyAECOM
Page31HydroCAD® 10.00-16 s/n 04851 © 2015 HydroCAD Software Solutions LLC
Summary for Pond 222P: SF
Inflow Area = 5.330 ac, 0.00% Impervious, Inflow Depth > 1.60" for 1 yr event
Inflow = 15.67 cfs @ 11.96 hrs, Volume= 0.712 af
Outflow = 0.21 cfs @ 19.10 hrs, Volume= 0.086 af, Atten= 99%, Lag= 428.4 min
Primary = 0.21 cfs @ 19.10 hrs, Volume= 0.086 af
Routing by Stor-Ind method, Time Span= 0.00-24.00 hrs, dt= 0.03 hrs
Peak Elev= 92.01' @ 19.10 hrs Surf.Area= 27,354 sf Storage= 27,347 cf
Plug-Flow detention time= 584.9 min calculated for 0.086 af (12% of inflow)
Center-of-Mass det. time= 431.0 min ( 1,255.0 - 824.0 )
Volume Invert Avail.Storage Storage Description
1 90.50' 55,826 cf Custom Stage Data (Prismatic) Listed below (Recalc)
Elevation Surf.Area Inc.Store Cum.Store
feet) (sq-ft) (cubic-feet) (cubic-feet)
90.50 4,842 0 0
91.00 18,475 5,829 5,829
91.50 19,525 9,500 15,329
92.00 27,321 11,712 27,041
93.00 30,250 28,786 55,826
Device Routing Invert Outlet Devices
1 Primary 92.00'50.0' long x 5.0' 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 3.50 4.00 4.50 5.00 5.50
Coef. (English) 2.34 2.50 2.70 2.68 2.68 2.66 2.65 2.65 2.65
2.65 2.67 2.66 2.68 2.70 2.74 2.79 2.88
Primary OutFlow Max=0.14 cfs @ 19.10 hrs HW=92.01' (Free Discharge)
1=Broad-Crested Rectangular Weir (Weir Controls 0.14 cfs @ 0.25 fps)
Type II 24-hr 1 yr Rainfall=3.02"Site ContractorY10A
Printed 2/12/2018PreparedbyAECOM
Page32HydroCAD® 10.00-16 s/n 04851 © 2015 HydroCAD Software Solutions LLC
Pond 222P: SF
Inflow
Primary
Hydrograph
Time (hours)
242220181614121086420Flow (
cfs)
16
14
12
10
8
6
4
2
0 Inflow Area=5.330
ac Peak Elev=92.
01'Storage=27,347
cf 15.67
cfs 0.21
cfs Pond 222P:
SF
Primary Stage-
Discharge Discharge (
cfs)
1301201101009080706050403020100Elevation (
feet)
93
92 91 Broad-Crested
Type II 24-hr 1 yr Rainfall=3.02"Site ContractorY10A
Printed 2/12/2018PreparedbyAECOM
Page33HydroCAD® 10.00-16 s/n 04851 © 2015 HydroCAD Software Solutions LLC
Pond 222P: SF
Surface
Storage
Stage-Area-Storage
Storage (cubic-feet)
40,00020,0000
Surface/Horizontal/Wetted Area (sq-ft)
30,00025,00020,00015,00010,0005,0000
Elevation (
feet)
93
92 91 Custom
Type II 24-hr 1 yr Rainfall=3.02"Site ContractorY10A
Printed 2/12/2018PreparedbyAECOM
Page34HydroCAD® 10.00-16 s/n 04851 © 2015 HydroCAD Software Solutions LLC
Hydrograph for Pond 222P: SF
Time
hours)
Inflow
cfs)
Storage
cubic-feet)
Elevation
feet)
Primary
cfs)
0.00 0.00 0 90.50 0.00
0.60 0.00 0 90.50 0.00
1.20 0.00 0 90.50 0.00
1.80 0.00 0 90.50 0.00
2.40 0.00 0 90.50 0.00
3.00 0.00 0 90.50 0.00
3.60 0.00 0 90.50 0.00
4.20 0.00 0 90.50 0.00
4.80 0.00 0 90.50 0.00
5.40 0.00 0 90.50 0.00
6.00 0.00 0 90.50 0.00
6.60 0.00 0 90.50 0.00
7.20 0.00 0 90.50 0.00
7.80 0.00 0 90.50 0.00
8.40 0.01 11 90.50 0.00
9.00 0.04 73 90.51 0.00
9.60 0.08 204 90.54 0.00
10.20 0.14 429 90.57 0.00
10.80 0.27 850 90.63 0.00
11.40 0.60 1,716 90.72 0.00
12.00 13.51 12,662 91.36 0.00
12.60 1.08 18,650 91.66 0.00
13.20 0.73 20,563 91.74 0.00
13.80 0.55 21,926 91.80 0.00
14.40 0.45 22,976 91.84 0.00
15.00 0.40 23,892 91.88 0.00
15.60 0.35 24,696 91.91 0.00
16.20 0.30 25,386 91.94 0.00
16.80 0.28 26,013 91.96 0.00
17.40 0.26 26,599 91.98 0.00
18.00 0.24 27,131 92.00 0.06
18.60 0.22 27,324 92.01 0.19
19.20 0.20 27,347 92.01 0.21
19.80 0.18 27,330 92.01 0.20
20.40 0.17 27,307 92.01 0.18
21.00 0.17 27,297 92.01 0.17
21.60 0.17 27,290 92.01 0.17
22.20 0.16 27,284 92.01 0.16
22.80 0.16 27,279 92.01 0.16
23.40 0.15 27,273 92.01 0.16
24.00 0.15 27,268 92.01 0.15
Type II 24-hr 1 yr Rainfall=3.02"Site ContractorY10A
Printed 2/12/2018PreparedbyAECOM
Page35HydroCAD® 10.00-16 s/n 04851 © 2015 HydroCAD Software Solutions LLC
Stage-Discharge for Pond 222P: SF
Elevation
feet)
Primary
cfs)
90.50 0.00
90.52 0.00
90.54 0.00
90.56 0.00
90.58 0.00
90.60 0.00
90.62 0.00
90.64 0.00
90.66 0.00
90.68 0.00
90.70 0.00
90.72 0.00
90.74 0.00
90.76 0.00
90.78 0.00
90.80 0.00
90.82 0.00
90.84 0.00
90.86 0.00
90.88 0.00
90.90 0.00
90.92 0.00
90.94 0.00
90.96 0.00
90.98 0.00
91.00 0.00
91.02 0.00
91.04 0.00
91.06 0.00
91.08 0.00
91.10 0.00
91.12 0.00
91.14 0.00
91.16 0.00
91.18 0.00
91.20 0.00
91.22 0.00
91.24 0.00
91.26 0.00
91.28 0.00
91.30 0.00
91.32 0.00
91.34 0.00
91.36 0.00
91.38 0.00
91.40 0.00
91.42 0.00
91.44 0.00
91.46 0.00
91.48 0.00
91.50 0.00
91.52 0.00
91.54 0.00
Elevation
feet)
Primary
cfs)
91.56 0.00
91.58 0.00
91.60 0.00
91.62 0.00
91.64 0.00
91.66 0.00
91.68 0.00
91.70 0.00
91.72 0.00
91.74 0.00
91.76 0.00
91.78 0.00
91.80 0.00
91.82 0.00
91.84 0.00
91.86 0.00
91.88 0.00
91.90 0.00
91.92 0.00
91.94 0.00
91.96 0.00
91.98 0.00
92.00 0.00
92.02 0.33
92.04 0.94
92.06 1.72
92.08 2.65
92.10 3.70
92.12 4.86
92.14 6.13
92.16 7.49
92.18 8.94
92.20 10.46
92.22 12.16
92.24 13.94
92.26 15.83
92.28 17.81
92.30 19.88
92.32 22.05
92.34 24.31
92.36 26.65
92.38 29.09
92.40 31.62
92.42 34.30
92.44 37.07
92.46 39.93
92.48 42.90
92.50 45.96
92.52 49.12
92.54 52.38
92.56 55.74
92.58 59.19
92.60 62.74
Elevation
feet)
Primary
cfs)
92.62 65.86
92.64 69.02
92.66 72.22
92.68 75.48
92.70 78.77
92.72 82.11
92.74 85.49
92.76 88.91
92.78 92.38
92.80 95.88
92.82 99.50
92.84 103.16
92.86 106.87
92.88 110.62
92.90 114.41
92.92 118.25
92.94 122.12
92.96 126.04
92.98 130.00
93.00 134.00
Type II 24-hr 1 yr Rainfall=3.02"Site ContractorY10A
Printed 2/12/2018PreparedbyAECOM
Page36HydroCAD® 10.00-16 s/n 04851 © 2015 HydroCAD Software Solutions LLC
Stage-Area-Storage for Pond 222P: SF
Elevation
feet)
Surface
sq-ft)
Storage
cubic-feet)
90.50 4,842 0
90.55 6,205 276
90.60 7,569 621
90.65 8,932 1,033
90.70 10,295 1,514
90.75 11,659 2,063
90.80 13,022 2,680
90.85 14,385 3,365
90.90 15,748 4,118
90.95 17,112 4,940
91.00 18,475 5,829
91.05 18,580 6,756
91.10 18,685 7,687
91.15 18,790 8,624
91.20 18,895 9,566
91.25 19,000 10,514
91.30 19,105 11,466
91.35 19,210 12,424
91.40 19,315 13,387
91.45 19,420 14,356
91.50 19,525 15,329
91.55 20,305 16,325
91.60 21,084 17,360
91.65 21,864 18,433
91.70 22,643 19,546
91.75 23,423 20,698
91.80 24,203 21,888
91.85 24,982 23,118
91.90 25,762 24,387
91.95 26,541 25,694
92.00 27,321 27,041
92.05 27,467 28,410
92.10 27,614 29,787
92.15 27,760 31,172
92.20 27,907 32,564
92.25 28,053 33,963
92.30 28,200 35,369
92.35 28,346 36,783
92.40 28,493 38,203
92.45 28,639 39,632
92.50 28,786 41,067
92.55 28,932 42,510
92.60 29,078 43,961
92.65 29,225 45,418
92.70 29,371 46,883
92.75 29,518 48,355
92.80 29,664 49,835
92.85 29,811 51,322
92.90 29,957 52,816
92.95 30,104 54,317
93.00 30,250 55,826
Type II 24-hr 1 yr Rainfall=3.02"Site ContractorY10A
Printed 2/12/2018PreparedbyAECOM
Page37HydroCAD® 10.00-16 s/n 04851 © 2015 HydroCAD Software Solutions LLC
Summary for Pond 223P: 223
Inflow Area = 3.710 ac, 0.00% Impervious, Inflow Depth > 1.92" for 1 yr event
Inflow = 12.76 cfs @ 11.96 hrs, Volume= 0.592 af
Outflow = 0.00 cfs @ 0.00 hrs, Volume= 0.000 af, Atten= 100%, Lag= 0.0 min
Primary = 0.00 cfs @ 0.00 hrs, Volume= 0.000 af
Routing by Stor-Ind method, Time Span= 0.00-24.00 hrs, dt= 0.03 hrs
Peak Elev= 93.64' @ 24.00 hrs Surf.Area= 12,149 sf Storage= 25,797 cf
Plug-Flow detention time= (not calculated: initial storage exceeds outflow)
Center-of-Mass det. time= (not calculated: no outflow)
Volume Invert Avail.Storage Storage Description
1 90.50' 44,430 cf Custom Stage Data (Prismatic) Listed below (Recalc)
Elevation Surf.Area Inc.Store Cum.Store
feet) (sq-ft) (cubic-feet) (cubic-feet)
90.50 5,898 0 0
92.00 7,314 9,909 9,909
92.50 8,772 4,022 13,931
93.00 10,247 4,755 18,685
93.50 11,740 5,497 24,182
94.00 13,251 6,248 30,430
95.00 14,750 14,001 44,430
Device Routing Invert Outlet Devices
1 Primary 94.00'50.0' long x 5.0' 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 3.50 4.00 4.50 5.00 5.50
Coef. (English) 2.34 2.50 2.70 2.68 2.68 2.66 2.65 2.65 2.65
2.65 2.67 2.66 2.68 2.70 2.74 2.79 2.88
Primary OutFlow Max=0.00 cfs @ 0.00 hrs HW=90.50' (Free Discharge)
1=Broad-Crested Rectangular Weir ( Controls 0.00 cfs)
Type II 24-hr 1 yr Rainfall=3.02"Site ContractorY10A
Printed 2/12/2018PreparedbyAECOM
Page38HydroCAD® 10.00-16 s/n 04851 © 2015 HydroCAD Software Solutions LLC
Pond 223P: 223
Inflow
Primary
Hydrograph
Time (hours)
242220181614121086420Flow (
cfs)
14
12
10
8
6
4
2
0 Inflow Area=3.710
ac Peak Elev=93.
64'Storage=25,797
cf 12.76
cfs 0.00
cfs Pond 223P:
223
Primary Stage-
Discharge Discharge (
cfs)
1301201101009080706050403020100Elevation (
feet)
95
94
93
92 91 Broad-Crested
Type II 24-hr 1 yr Rainfall=3.02"Site ContractorY10A
Printed 2/12/2018PreparedbyAECOM
Page39HydroCAD® 10.00-16 s/n 04851 © 2015 HydroCAD Software Solutions LLC
Pond 223P: 223
Surface
Storage
Stage-Area-Storage
Storage (cubic-feet)
40,00030,00020,00010,0000
Surface/Horizontal/Wetted Area (sq-ft)
14,00012,00010,0008,0006,0004,0002,0000
Elevation (
feet)
95
94
93 92 91 Custom
Type II 24-hr 1 yr Rainfall=3.02"Site ContractorY10A
Printed 2/12/2018PreparedbyAECOM
Page40HydroCAD® 10.00-16 s/n 04851 © 2015 HydroCAD Software Solutions LLC
Hydrograph for Pond 223P: 223
Time
hours)
Inflow
cfs)
Storage
cubic-feet)
Elevation
feet)
Primary
cfs)
0.00 0.00 0 90.50 0.00
0.60 0.00 0 90.50 0.00
1.20 0.00 0 90.50 0.00
1.80 0.00 0 90.50 0.00
2.40 0.00 0 90.50 0.00
3.00 0.00 0 90.50 0.00
3.60 0.00 0 90.50 0.00
4.20 0.00 0 90.50 0.00
4.80 0.00 0 90.50 0.00
5.40 0.00 0 90.50 0.00
6.00 0.00 0 90.50 0.00
6.60 0.01 6 90.50 0.00
7.20 0.02 37 90.51 0.00
7.80 0.03 95 90.52 0.00
8.40 0.05 187 90.53 0.00
9.00 0.09 339 90.56 0.00
9.60 0.11 555 90.59 0.00
10.20 0.18 861 90.64 0.00
10.80 0.30 1,358 90.73 0.00
11.40 0.61 2,268 90.87 0.00
12.00 10.85 11,669 92.23 0.00
12.60 0.84 16,396 92.77 0.00
13.20 0.56 17,875 92.92 0.00
13.80 0.42 18,922 93.02 0.00
14.40 0.34 19,725 93.10 0.00
15.00 0.30 20,424 93.17 0.00
15.60 0.26 21,035 93.22 0.00
16.20 0.23 21,560 93.27 0.00
16.80 0.21 22,034 93.31 0.00
17.40 0.20 22,478 93.35 0.00
18.00 0.18 22,890 93.39 0.00
18.60 0.17 23,270 93.42 0.00
19.20 0.15 23,618 93.45 0.00
19.80 0.14 23,934 93.48 0.00
20.40 0.13 24,222 93.50 0.00
21.00 0.13 24,500 93.53 0.00
21.60 0.12 24,772 93.55 0.00
22.20 0.12 25,038 93.57 0.00
22.80 0.12 25,298 93.59 0.00
23.40 0.12 25,551 93.61 0.00
24.00 0.11 25,798 93.64 0.00
Type II 24-hr 1 yr Rainfall=3.02"Site ContractorY10A
Printed 2/12/2018PreparedbyAECOM
Page41HydroCAD® 10.00-16 s/n 04851 © 2015 HydroCAD Software Solutions LLC
Stage-Discharge for Pond 223P: 223
Elevation
feet)
Primary
cfs)
90.50 0.00
90.55 0.00
90.60 0.00
90.65 0.00
90.70 0.00
90.75 0.00
90.80 0.00
90.85 0.00
90.90 0.00
90.95 0.00
91.00 0.00
91.05 0.00
91.10 0.00
91.15 0.00
91.20 0.00
91.25 0.00
91.30 0.00
91.35 0.00
91.40 0.00
91.45 0.00
91.50 0.00
91.55 0.00
91.60 0.00
91.65 0.00
91.70 0.00
91.75 0.00
91.80 0.00
91.85 0.00
91.90 0.00
91.95 0.00
92.00 0.00
92.05 0.00
92.10 0.00
92.15 0.00
92.20 0.00
92.25 0.00
92.30 0.00
92.35 0.00
92.40 0.00
92.45 0.00
92.50 0.00
92.55 0.00
92.60 0.00
92.65 0.00
92.70 0.00
92.75 0.00
92.80 0.00
92.85 0.00
92.90 0.00
92.95 0.00
93.00 0.00
93.05 0.00
93.10 0.00
Elevation
feet)
Primary
cfs)
93.15 0.00
93.20 0.00
93.25 0.00
93.30 0.00
93.35 0.00
93.40 0.00
93.45 0.00
93.50 0.00
93.55 0.00
93.60 0.00
93.65 0.00
93.70 0.00
93.75 0.00
93.80 0.00
93.85 0.00
93.90 0.00
93.95 0.00
94.00 0.00
94.05 1.31
94.10 3.70
94.15 6.80
94.20 10.46
94.25 14.88
94.30 19.88
94.35 25.47
94.40 31.62
94.45 38.49
94.50 45.96
94.55 54.05
94.60 62.74
94.65 70.62
94.70 78.77
94.75 87.20
94.80 95.88
94.85 105.01
94.90 114.41
94.95 124.08
95.00 134.00
Type II 24-hr 1 yr Rainfall=3.02"Site ContractorY10A
Printed 2/12/2018PreparedbyAECOM
Page42HydroCAD® 10.00-16 s/n 04851 © 2015 HydroCAD Software Solutions LLC
Stage-Area-Storage for Pond 223P: 223
Elevation
feet)
Surface
sq-ft)
Storage
cubic-feet)
90.50 5,898 0
90.55 5,945 296
90.60 5,992 595
90.65 6,040 895
90.70 6,087 1,198
90.75 6,134 1,504
90.80 6,181 1,812
90.85 6,228 2,122
90.90 6,276 2,435
90.95 6,323 2,750
91.00 6,370 3,067
91.05 6,417 3,387
91.10 6,464 3,709
91.15 6,512 4,033
91.20 6,559 4,360
91.25 6,606 4,689
91.30 6,653 5,020
91.35 6,700 5,354
91.40 6,748 5,691
91.45 6,795 6,029
91.50 6,842 6,370
91.55 6,889 6,713
91.60 6,936 7,059
91.65 6,984 7,407
91.70 7,031 7,757
91.75 7,078 8,110
91.80 7,125 8,465
91.85 7,172 8,823
91.90 7,220 9,182
91.95 7,267 9,544
92.00 7,314 9,909
92.05 7,460 10,278
92.10 7,606 10,655
92.15 7,751 11,039
92.20 7,897 11,430
92.25 8,043 11,829
92.30 8,189 12,234
92.35 8,335 12,648
92.40 8,480 13,068
92.45 8,626 13,496
92.50 8,772 13,931
92.55 8,919 14,373
92.60 9,067 14,822
92.65 9,215 15,279
92.70 9,362 15,744
92.75 9,510 16,216
92.80 9,657 16,695
92.85 9,804 17,181
92.90 9,952 17,675
92.95 10,100 18,177
93.00 10,247 18,685
93.05 10,396 19,201
93.10 10,546 19,725
Elevation
feet)
Surface
sq-ft)
Storage
cubic-feet)
93.15 10,695 20,256
93.20 10,844 20,794
93.25 10,994 21,340
93.30 11,143 21,894
93.35 11,292 22,455
93.40 11,441 23,023
93.45 11,591 23,599
93.50 11,740 24,182
93.55 11,891 24,773
93.60 12,042 25,371
93.65 12,193 25,977
93.70 12,344 26,590
93.75 12,496 27,211
93.80 12,647 27,840
93.85 12,798 28,476
93.90 12,949 29,120
93.95 13,100 29,771
94.00 13,251 30,430
94.05 13,326 31,094
94.10 13,401 31,762
94.15 13,476 32,434
94.20 13,551 33,110
94.25 13,626 33,789
94.30 13,701 34,473
94.35 13,776 35,159
94.40 13,851 35,850
94.45 13,926 36,544
94.50 14,001 37,243
94.55 14,075 37,945
94.60 14,150 38,650
94.65 14,225 39,360
94.70 14,300 40,073
94.75 14,375 40,790
94.80 14,450 41,510
94.85 14,525 42,235
94.90 14,600 42,963
94.95 14,675 43,695
95.00 14,750 44,430
Type II 24-hr 1 yr Rainfall=3.02"Site ContractorY10A
Printed 2/12/2018PreparedbyAECOM
Page43HydroCAD® 10.00-16 s/n 04851 © 2015 HydroCAD Software Solutions LLC
Summary for Pond 224P: 224
Inflow Area = 3.190 ac, 0.00% Impervious, Inflow Depth > 0.68" for 1 yr event
Inflow = 3.79 cfs @ 11.97 hrs, Volume= 0.181 af
Outflow = 0.00 cfs @ 0.00 hrs, Volume= 0.000 af, Atten= 100%, Lag= 0.0 min
Primary = 0.00 cfs @ 0.00 hrs, Volume= 0.000 af
Routing by Stor-Ind method, Time Span= 0.00-24.00 hrs, dt= 0.03 hrs
Peak Elev= 91.21' @ 24.00 hrs Surf.Area= 7,658 sf Storage= 7,863 cf
Plug-Flow detention time= (not calculated: initial storage exceeds outflow)
Center-of-Mass det. time= (not calculated: no outflow)
Volume Invert Avail.Storage Storage Description
1 90.00' 24,373 cf Custom Stage Data (Prismatic) Listed below (Recalc)
Elevation Surf.Area Inc.Store Cum.Store
feet) (sq-ft) (cubic-feet) (cubic-feet)
90.00 5,642 0 0
90.50 6,177 2,955 2,955
91.00 7,286 3,366 6,321
91.50 8,188 3,869 10,189
92.00 9,216 4,351 14,540
93.00 10,450 9,833 24,373
Device Routing Invert Outlet Devices
1 Primary 92.00'50.0' long x 5.0' 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 3.50 4.00 4.50 5.00 5.50
Coef. (English) 2.34 2.50 2.70 2.68 2.68 2.66 2.65 2.65 2.65
2.65 2.67 2.66 2.68 2.70 2.74 2.79 2.88
Primary OutFlow Max=0.00 cfs @ 0.00 hrs HW=90.00' (Free Discharge)
1=Broad-Crested Rectangular Weir ( Controls 0.00 cfs)
Type II 24-hr 1 yr Rainfall=3.02"Site ContractorY10A
Printed 2/12/2018PreparedbyAECOM
Page44HydroCAD® 10.00-16 s/n 04851 © 2015 HydroCAD Software Solutions LLC
Pond 224P: 224
Inflow
Primary
Hydrograph
Time (hours)
242220181614121086420Flow (
cfs)
4
3
2
1
0 Inflow Area=3.190
ac Peak Elev=91.
21'Storage=7,863
cf 3.79
cfs 0.00
cfs Pond 224P:
224
Primary Stage-
Discharge Discharge (
cfs)
1301201101009080706050403020100Elevation (
feet)
93
92
91 90 Broad-Crested
Type II 24-hr 1 yr Rainfall=3.02"Site ContractorY10A
Printed 2/12/2018PreparedbyAECOM
Page45HydroCAD® 10.00-16 s/n 04851 © 2015 HydroCAD Software Solutions LLC
Pond 224P: 224
Surface
Storage
Stage-Area-Storage
Storage (cubic-feet)
20,00015,00010,0005,0000
Surface/Horizontal/Wetted Area (sq-ft)
10,0008,0006,0004,0002,0000
Elevation (
feet)
93
92
91 90 Custom
Type II 24-hr 1 yr Rainfall=3.02"Site ContractorY10A
Printed 2/12/2018PreparedbyAECOM
Page46HydroCAD® 10.00-16 s/n 04851 © 2015 HydroCAD Software Solutions LLC
Hydrograph for Pond 224P: 224
Time
hours)
Inflow
cfs)
Storage
cubic-feet)
Elevation
feet)
Primary
cfs)
0.00 0.00 0 90.00 0.00
0.60 0.00 0 90.00 0.00
1.20 0.00 0 90.00 0.00
1.80 0.00 0 90.00 0.00
2.40 0.00 0 90.00 0.00
3.00 0.00 0 90.00 0.00
3.60 0.00 0 90.00 0.00
4.20 0.00 0 90.00 0.00
4.80 0.00 0 90.00 0.00
5.40 0.00 0 90.00 0.00
6.00 0.00 0 90.00 0.00
6.60 0.00 0 90.00 0.00
7.20 0.00 0 90.00 0.00
7.80 0.00 0 90.00 0.00
8.40 0.00 0 90.00 0.00
9.00 0.00 0 90.00 0.00
9.60 0.00 0 90.00 0.00
10.20 0.00 0 90.00 0.00
10.80 0.00 0 90.00 0.00
11.40 0.00 0 90.00 0.00
12.00 3.49 1,783 90.31 0.00
12.60 0.34 3,503 90.59 0.00
13.20 0.24 4,121 90.68 0.00
13.80 0.18 4,575 90.75 0.00
14.40 0.15 4,933 90.80 0.00
15.00 0.14 5,251 90.85 0.00
15.60 0.12 5,533 90.89 0.00
16.20 0.11 5,779 90.92 0.00
16.80 0.10 6,003 90.96 0.00
17.40 0.10 6,216 90.99 0.00
18.00 0.09 6,414 91.01 0.00
18.60 0.08 6,599 91.04 0.00
19.20 0.08 6,770 91.06 0.00
19.80 0.07 6,926 91.08 0.00
20.40 0.06 7,068 91.10 0.00
21.00 0.06 7,207 91.12 0.00
21.60 0.06 7,343 91.14 0.00
22.20 0.06 7,477 91.16 0.00
22.80 0.06 7,608 91.17 0.00
23.40 0.06 7,737 91.19 0.00
24.00 0.06 7,863 91.21 0.00
Type II 24-hr 1 yr Rainfall=3.02"Site ContractorY10A
Printed 2/12/2018PreparedbyAECOM
Page47HydroCAD® 10.00-16 s/n 04851 © 2015 HydroCAD Software Solutions LLC
Stage-Discharge for Pond 224P: 224
Elevation
feet)
Primary
cfs)
90.00 0.00
90.02 0.00
90.04 0.00
90.06 0.00
90.08 0.00
90.10 0.00
90.12 0.00
90.14 0.00
90.16 0.00
90.18 0.00
90.20 0.00
90.22 0.00
90.24 0.00
90.26 0.00
90.28 0.00
90.30 0.00
90.32 0.00
90.34 0.00
90.36 0.00
90.38 0.00
90.40 0.00
90.42 0.00
90.44 0.00
90.46 0.00
90.48 0.00
90.50 0.00
90.52 0.00
90.54 0.00
90.56 0.00
90.58 0.00
90.60 0.00
90.62 0.00
90.64 0.00
90.66 0.00
90.68 0.00
90.70 0.00
90.72 0.00
90.74 0.00
90.76 0.00
90.78 0.00
90.80 0.00
90.82 0.00
90.84 0.00
90.86 0.00
90.88 0.00
90.90 0.00
90.92 0.00
90.94 0.00
90.96 0.00
90.98 0.00
91.00 0.00
91.02 0.00
91.04 0.00
Elevation
feet)
Primary
cfs)
91.06 0.00
91.08 0.00
91.10 0.00
91.12 0.00
91.14 0.00
91.16 0.00
91.18 0.00
91.20 0.00
91.22 0.00
91.24 0.00
91.26 0.00
91.28 0.00
91.30 0.00
91.32 0.00
91.34 0.00
91.36 0.00
91.38 0.00
91.40 0.00
91.42 0.00
91.44 0.00
91.46 0.00
91.48 0.00
91.50 0.00
91.52 0.00
91.54 0.00
91.56 0.00
91.58 0.00
91.60 0.00
91.62 0.00
91.64 0.00
91.66 0.00
91.68 0.00
91.70 0.00
91.72 0.00
91.74 0.00
91.76 0.00
91.78 0.00
91.80 0.00
91.82 0.00
91.84 0.00
91.86 0.00
91.88 0.00
91.90 0.00
91.92 0.00
91.94 0.00
91.96 0.00
91.98 0.00
92.00 0.00
92.02 0.33
92.04 0.94
92.06 1.72
92.08 2.65
92.10 3.70
Elevation
feet)
Primary
cfs)
92.12 4.86
92.14 6.13
92.16 7.49
92.18 8.94
92.20 10.46
92.22 12.16
92.24 13.94
92.26 15.83
92.28 17.81
92.30 19.88
92.32 22.05
92.34 24.31
92.36 26.65
92.38 29.09
92.40 31.62
92.42 34.30
92.44 37.07
92.46 39.93
92.48 42.90
92.50 45.96
92.52 49.12
92.54 52.38
92.56 55.74
92.58 59.19
92.60 62.74
92.62 65.86
92.64 69.02
92.66 72.22
92.68 75.48
92.70 78.77
92.72 82.11
92.74 85.49
92.76 88.91
92.78 92.38
92.80 95.88
92.82 99.50
92.84 103.16
92.86 106.87
92.88 110.62
92.90 114.41
92.92 118.25
92.94 122.12
92.96 126.04
92.98 130.00
93.00 134.00
Type II 24-hr 1 yr Rainfall=3.02"Site ContractorY10A
Printed 2/12/2018PreparedbyAECOM
Page48HydroCAD® 10.00-16 s/n 04851 © 2015 HydroCAD Software Solutions LLC
Stage-Area-Storage for Pond 224P: 224
Elevation
feet)
Surface
sq-ft)
Storage
cubic-feet)
90.00 5,642 0
90.05 5,695 283
90.10 5,749 570
90.15 5,803 858
90.20 5,856 1,150
90.25 5,910 1,444
90.30 5,963 1,741
90.35 6,016 2,040
90.40 6,070 2,342
90.45 6,124 2,647
90.50 6,177 2,955
90.55 6,288 3,266
90.60 6,399 3,584
90.65 6,510 3,906
90.70 6,621 4,235
90.75 6,732 4,568
90.80 6,842 4,908
90.85 6,953 5,253
90.90 7,064 5,603
90.95 7,175 5,959
91.00 7,286 6,321
91.05 7,376 6,687
91.10 7,466 7,058
91.15 7,557 7,434
91.20 7,647 7,814
91.25 7,737 8,198
91.30 7,827 8,587
91.35 7,917 8,981
91.40 8,008 9,379
91.45 8,098 9,782
91.50 8,188 10,189
91.55 8,291 10,601
91.60 8,394 11,018
91.65 8,496 11,440
91.70 8,599 11,868
91.75 8,702 12,300
91.80 8,805 12,738
91.85 8,908 13,181
91.90 9,010 13,629
91.95 9,113 14,082
92.00 9,216 14,540
92.05 9,278 15,002
92.10 9,339 15,468
92.15 9,401 15,936
92.20 9,463 16,408
92.25 9,525 16,883
92.30 9,586 17,360
92.35 9,648 17,841
92.40 9,710 18,325
92.45 9,771 18,812
92.50 9,833 19,302
92.55 9,895 19,795
92.60 9,956 20,292
Elevation
feet)
Surface
sq-ft)
Storage
cubic-feet)
92.65 10,018 20,791
92.70 10,080 21,294
92.75 10,142 21,799
92.80 10,203 22,308
92.85 10,265 22,819
92.90 10,327 23,334
92.95 10,388 23,852
93.00 10,450 24,373
Type II 24-hr 2 yr Rainfall=3.66"Site ContractorY10A
Printed 2/12/2018PreparedbyAECOM
Page49HydroCAD® 10.00-16 s/n 04851 © 2015 HydroCAD Software Solutions LLC
Time span=0.00-24.00 hrs, dt=0.03 hrs, 801 points
Runoff by SCS TR-20 method, UH=SCS, Weighted-CN
Reach routing by Stor-Ind+Trans method - Pond routing by Stor-Ind method
Runoff Area=24.590 ac 0.00% Impervious Runoff Depth>1.40"Subcatchment 121S: Pre Dev't
Flow Length=1,245' Tc=27.6 min CN=75 Runoff=30.78 cfs 2.877 af
Runoff Area=5.330 ac 0.00% Impervious Runoff Depth>1.28"Subcatchment 122S: Pre Dev't
Tc=10.0 min CN=73 Runoff=10.40 cfs 0.571 af
Runoff Area=3.710 ac 0.00% Impervious Runoff Depth>1.28"Subcatchment 123S: Pre Dev't
Tc=30.0 min CN=73 Runoff=3.92 cfs 0.394 af
Runoff Area=3.190 ac 0.00% Impervious Runoff Depth>1.28"Subcatchment 124S: Pre Dev't
Tc=10.0 min CN=73 Runoff=6.22 cfs 0.341 af
Runoff Area=24.590 ac 0.00% Impervious Runoff Depth>2.32"Subcatchment 221S: Post CY (s)
Flow Length=979' Tc=14.1 min CN=87 Runoff=75.53 cfs 4.753 af
Runoff Area=5.330 ac 0.00% Impervious Runoff Depth>2.15"Subcatchment 222S: Post CY (nw)
Tc=5.0 min CN=85 Runoff=20.84 cfs 0.957 af
Runoff Area=3.710 ac 0.00% Impervious Runoff Depth>2.50"Subcatchment 223S: Post CY (ne)
Tc=5.0 min CN=89 Runoff=16.43 cfs 0.774 af
Runoff Area=3.190 ac 0.00% Impervious Runoff Depth>1.05"Subcatchment 224S: Post CY (se)
Tc=5.0 min CN=69 Runoff=6.08 cfs 0.279 af
Peak Elev=93.60' Storage=139,996 cf Inflow=75.53 cfs 4.753afPond221P: 221
Outflow=4.00 cfs 1.633 af
Peak Elev=92.04' Storage=28,003 cf Inflow=20.84 cfs 0.957afPond222P: SF
Outflow=0.81 cfs 0.329 af
Peak Elev=94.01' Storage=30,596 cf Inflow=16.43 cfs 0.774afPond223P: 223
Outflow=0.20 cfs 0.072 af
Peak Elev=91.73' Storage=12,150 cf Inflow=6.08 cfs 0.279afPond224P: 224
Outflow=0.00 cfs 0.000 af
Total Runoff Area = 73.640 ac Runoff Volume = 10.946 af Average Runoff Depth = 1.78"
100.00% Pervious = 73.640 ac 0.00% Impervious = 0.000 ac
Type II 24-hr 2 yr Rainfall=3.66"Site ContractorY10A
Printed 2/12/2018PreparedbyAECOM
Page50HydroCAD® 10.00-16 s/n 04851 © 2015 HydroCAD Software Solutions LLC
Summary for Subcatchment 121S: Pre Dev't
Runoff = 30.78 cfs @ 12.23 hrs, Volume= 2.877 af, Depth> 1.40"
Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-24.00 hrs, dt= 0.03 hrs
Type II 24-hr 2 yr Rainfall=3.66"
Area (ac) CN Description
24.590 75
24.590 100.00% Pervious Area
Tc Length Slope Velocity Capacity Description
min) (feet) (ft/ft) (ft/sec) (cfs)
6.7 165 0.0212 0.41 Sheet Flow,
Cultivated: Residue<=20% n= 0.060 P2= 3.36"
1.8 106 0.0038 0.99 Shallow Concentrated Flow,
Unpaved Kv= 16.1 fps
0.4 150 0.0220 5.84 70.07 Channel Flow,
Area= 12.0 sf Perim= 11.0' r= 1.09' n= 0.040
0.1 24 0.0083 3.73 26.33 Pipe Channel,
36.0" Round Area= 7.1 sf Perim= 9.4' r= 0.75'
n= 0.030 Corrugated metal
9.9 384 0.0016 0.64 Shallow Concentrated Flow,
Unpaved Kv= 16.1 fps
0.9 32 0.0063 0.62 0.03 Pipe Channel,
3.0" Round Area= 0.0 sf Perim= 0.8' r= 0.06'
n= 0.030 Corrugated metal
7.8 384 0.0026 0.82 Shallow Concentrated Flow,
Unpaved Kv= 16.1 fps
27.6 1,245 Total
Type II 24-hr 2 yr Rainfall=3.66"Site ContractorY10A
Printed 2/12/2018PreparedbyAECOM
Page51HydroCAD® 10.00-16 s/n 04851 © 2015 HydroCAD Software Solutions LLC
Subcatchment 121S: Pre Dev't
Runoff
Hydrograph
Time (hours)
242220181614121086420Flow (
cfs)
30
25
20
15
10
5
0 Type II 24-
hr 2 yr Rainfall=3.
66"Runoff Area=24.590
ac Runoff Volume=2.877
af Runoff Depth>1.
40"Flow Length=1,
245'Tc=27.6
min CN=
75 30.78
Type II 24-hr 2 yr Rainfall=3.66"Site ContractorY10A
Printed 2/12/2018PreparedbyAECOM
Page52HydroCAD® 10.00-16 s/n 04851 © 2015 HydroCAD Software Solutions LLC
Hydrograph for Subcatchment 121S: Pre Dev't
Time
hours)
Precip.
inches)
Excess
inches)
Runoff
cfs)
0.00 0.00 0.00 0.00
0.30 0.01 0.00 0.00
0.60 0.02 0.00 0.00
0.90 0.03 0.00 0.00
1.20 0.05 0.00 0.00
1.50 0.06 0.00 0.00
1.80 0.07 0.00 0.00
2.10 0.08 0.00 0.00
2.40 0.10 0.00 0.00
2.70 0.11 0.00 0.00
3.00 0.13 0.00 0.00
3.30 0.14 0.00 0.00
3.60 0.16 0.00 0.00
3.90 0.17 0.00 0.00
4.20 0.19 0.00 0.00
4.50 0.20 0.00 0.00
4.80 0.22 0.00 0.00
5.10 0.24 0.00 0.00
5.40 0.25 0.00 0.00
5.70 0.27 0.00 0.00
6.00 0.29 0.00 0.00
6.30 0.31 0.00 0.00
6.60 0.33 0.00 0.00
6.90 0.36 0.00 0.00
7.20 0.38 0.00 0.00
7.50 0.40 0.00 0.00
7.80 0.42 0.00 0.00
8.10 0.45 0.00 0.00
8.40 0.47 0.00 0.00
8.70 0.50 0.00 0.00
9.00 0.54 0.00 0.00
9.30 0.57 0.00 0.00
9.60 0.61 0.00 0.00
9.90 0.65 0.00 0.00
10.20 0.69 0.00 0.00
10.50 0.75 0.00 0.04
10.80 0.81 0.01 0.16
11.10 0.89 0.01 0.38
11.40 0.99 0.03 0.74
11.70 1.30 0.10 1.60
12.00 2.43 0.61 13.08
12.30 2.61 0.72 28.87
12.60 2.72 0.78 12.65
12.90 2.80 0.83 6.56
13.20 2.87 0.88 4.45
13.50 2.92 0.91 3.48
13.80 2.97 0.94 2.96
14.10 3.01 0.97 2.57
14.40 3.05 1.00 2.28
14.70 3.09 1.02 2.11
15.00 3.12 1.04 1.99
15.30 3.16 1.06 1.87
15.60 3.19 1.08 1.75
Time
hours)
Precip.
inches)
Excess
inches)
Runoff
cfs)
15.90 3.21 1.10 1.63
16.20 3.24 1.12 1.51
16.50 3.26 1.14 1.42
16.80 3.29 1.15 1.37
17.10 3.31 1.17 1.33
17.40 3.33 1.18 1.28
17.70 3.35 1.20 1.24
18.00 3.37 1.21 1.20
18.30 3.39 1.22 1.15
18.60 3.41 1.24 1.11
18.90 3.43 1.25 1.07
19.20 3.44 1.26 1.02
19.50 3.46 1.27 0.97
19.80 3.47 1.28 0.93
20.10 3.49 1.29 0.88
20.40 3.50 1.30 0.85
20.70 3.52 1.31 0.83
21.00 3.53 1.32 0.82
21.30 3.54 1.33 0.81
21.60 3.56 1.34 0.80
21.90 3.57 1.35 0.79
22.20 3.58 1.36 0.78
22.50 3.60 1.37 0.78
22.80 3.61 1.38 0.77
23.10 3.62 1.39 0.76
23.40 3.64 1.40 0.75
23.70 3.65 1.41 0.74
24.00 3.66 1.42 0.73
Type II 24-hr 2 yr Rainfall=3.66"Site ContractorY10A
Printed 2/12/2018PreparedbyAECOM
Page53HydroCAD® 10.00-16 s/n 04851 © 2015 HydroCAD Software Solutions LLC
Summary for Subcatchment 122S: Pre Dev't
Runoff = 10.40 cfs @ 12.02 hrs, Volume= 0.571 af, Depth> 1.28"
Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-24.00 hrs, dt= 0.03 hrs
Type II 24-hr 2 yr Rainfall=3.66"
Area (ac) CN Description
5.330 73
5.330 100.00% Pervious Area
Tc Length Slope Velocity Capacity Description
min) (feet) (ft/ft) (ft/sec) (cfs)
10.0 Direct Entry, Direct
Subcatchment 122S: Pre Dev't
Runoff
Hydrograph
Time (hours)
242220181614121086420Flow (
cfs)
11
10
9
8
7
6
5
4
3
2
1
0 Type II 24-
hr 2 yr Rainfall=3.
66"Runoff Area=5.330
ac Runoff Volume=0.571
af Runoff Depth>1.
28"Tc=10.0
min CN=
73 10.40
Type II 24-hr 2 yr Rainfall=3.66"Site ContractorY10A
Printed 2/12/2018PreparedbyAECOM
Page54HydroCAD® 10.00-16 s/n 04851 © 2015 HydroCAD Software Solutions LLC
Hydrograph for Subcatchment 122S: Pre Dev't
Time
hours)
Precip.
inches)
Excess
inches)
Runoff
cfs)
0.00 0.00 0.00 0.00
0.30 0.01 0.00 0.00
0.60 0.02 0.00 0.00
0.90 0.03 0.00 0.00
1.20 0.05 0.00 0.00
1.50 0.06 0.00 0.00
1.80 0.07 0.00 0.00
2.10 0.08 0.00 0.00
2.40 0.10 0.00 0.00
2.70 0.11 0.00 0.00
3.00 0.13 0.00 0.00
3.30 0.14 0.00 0.00
3.60 0.16 0.00 0.00
3.90 0.17 0.00 0.00
4.20 0.19 0.00 0.00
4.50 0.20 0.00 0.00
4.80 0.22 0.00 0.00
5.10 0.24 0.00 0.00
5.40 0.25 0.00 0.00
5.70 0.27 0.00 0.00
6.00 0.29 0.00 0.00
6.30 0.31 0.00 0.00
6.60 0.33 0.00 0.00
6.90 0.36 0.00 0.00
7.20 0.38 0.00 0.00
7.50 0.40 0.00 0.00
7.80 0.42 0.00 0.00
8.10 0.45 0.00 0.00
8.40 0.47 0.00 0.00
8.70 0.50 0.00 0.00
9.00 0.54 0.00 0.00
9.30 0.57 0.00 0.00
9.60 0.61 0.00 0.00
9.90 0.65 0.00 0.00
10.20 0.69 0.00 0.00
10.50 0.75 0.00 0.00
10.80 0.81 0.00 0.02
11.10 0.89 0.01 0.08
11.40 0.99 0.02 0.19
11.70 1.30 0.07 0.88
12.00 2.43 0.53 10.04
12.30 2.61 0.63 2.09
12.60 2.72 0.69 1.12
12.90 2.80 0.74 0.85
13.20 2.87 0.78 0.70
13.50 2.92 0.81 0.61
13.80 2.97 0.84 0.53
14.10 3.01 0.87 0.46
14.40 3.05 0.89 0.43
14.70 3.09 0.91 0.41
15.00 3.12 0.93 0.38
15.30 3.16 0.95 0.36
15.60 3.19 0.97 0.34
Time
hours)
Precip.
inches)
Excess
inches)
Runoff
cfs)
15.90 3.21 0.99 0.31
16.20 3.24 1.01 0.29
16.50 3.26 1.02 0.28
16.80 3.29 1.04 0.27
17.10 3.31 1.05 0.26
17.40 3.33 1.07 0.26
17.70 3.35 1.08 0.25
18.00 3.37 1.09 0.24
18.30 3.39 1.11 0.23
18.60 3.41 1.12 0.22
18.90 3.43 1.13 0.21
19.20 3.44 1.14 0.20
19.50 3.46 1.15 0.19
19.80 3.47 1.16 0.18
20.10 3.49 1.17 0.17
20.40 3.50 1.18 0.17
20.70 3.52 1.19 0.17
21.00 3.53 1.20 0.17
21.30 3.54 1.21 0.17
21.60 3.56 1.22 0.16
21.90 3.57 1.23 0.16
22.20 3.58 1.24 0.16
22.50 3.60 1.25 0.16
22.80 3.61 1.25 0.16
23.10 3.62 1.26 0.15
23.40 3.64 1.27 0.15
23.70 3.65 1.28 0.15
24.00 3.66 1.29 0.15
Type II 24-hr 2 yr Rainfall=3.66"Site ContractorY10A
Printed 2/12/2018PreparedbyAECOM
Page55HydroCAD® 10.00-16 s/n 04851 © 2015 HydroCAD Software Solutions LLC
Summary for Subcatchment 123S: Pre Dev't
Runoff = 3.92 cfs @ 12.26 hrs, Volume= 0.394 af, Depth> 1.28"
Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-24.00 hrs, dt= 0.03 hrs
Type II 24-hr 2 yr Rainfall=3.66"
Area (ac) CN Description
3.710 73
3.710 100.00% Pervious Area
Tc Length Slope Velocity Capacity Description
min) (feet) (ft/ft) (ft/sec) (cfs)
30.0 Direct Entry,
Subcatchment 123S: Pre Dev't
Runoff
Hydrograph
Time (hours)
242220181614121086420Flow (
cfs)
4
3
2
1
0 Type II 24-
hr 2 yr Rainfall=3.
66"Runoff Area=3.710
ac Runoff Volume=0.394
af Runoff Depth>1.
28"Tc=30.0
min CN=
73 3.92
Type II 24-hr 2 yr Rainfall=3.66"Site ContractorY10A
Printed 2/12/2018PreparedbyAECOM
Page56HydroCAD® 10.00-16 s/n 04851 © 2015 HydroCAD Software Solutions LLC
Hydrograph for Subcatchment 123S: Pre Dev't
Time
hours)
Precip.
inches)
Excess
inches)
Runoff
cfs)
0.00 0.00 0.00 0.00
0.30 0.01 0.00 0.00
0.60 0.02 0.00 0.00
0.90 0.03 0.00 0.00
1.20 0.05 0.00 0.00
1.50 0.06 0.00 0.00
1.80 0.07 0.00 0.00
2.10 0.08 0.00 0.00
2.40 0.10 0.00 0.00
2.70 0.11 0.00 0.00
3.00 0.13 0.00 0.00
3.30 0.14 0.00 0.00
3.60 0.16 0.00 0.00
3.90 0.17 0.00 0.00
4.20 0.19 0.00 0.00
4.50 0.20 0.00 0.00
4.80 0.22 0.00 0.00
5.10 0.24 0.00 0.00
5.40 0.25 0.00 0.00
5.70 0.27 0.00 0.00
6.00 0.29 0.00 0.00
6.30 0.31 0.00 0.00
6.60 0.33 0.00 0.00
6.90 0.36 0.00 0.00
7.20 0.38 0.00 0.00
7.50 0.40 0.00 0.00
7.80 0.42 0.00 0.00
8.10 0.45 0.00 0.00
8.40 0.47 0.00 0.00
8.70 0.50 0.00 0.00
9.00 0.54 0.00 0.00
9.30 0.57 0.00 0.00
9.60 0.61 0.00 0.00
9.90 0.65 0.00 0.00
10.20 0.69 0.00 0.00
10.50 0.75 0.00 0.00
10.80 0.81 0.00 0.00
11.10 0.89 0.01 0.02
11.40 0.99 0.02 0.06
11.70 1.30 0.07 0.16
12.00 2.43 0.53 1.41
12.30 2.61 0.63 3.87
12.60 2.72 0.69 1.91
12.90 2.80 0.74 1.00
13.20 2.87 0.78 0.66
13.50 2.92 0.81 0.51
13.80 2.97 0.84 0.43
14.10 3.01 0.87 0.37
14.40 3.05 0.89 0.33
14.70 3.09 0.91 0.30
15.00 3.12 0.93 0.28
15.30 3.16 0.95 0.27
15.60 3.19 0.97 0.25
Time
hours)
Precip.
inches)
Excess
inches)
Runoff
cfs)
15.90 3.21 0.99 0.23
16.20 3.24 1.01 0.22
16.50 3.26 1.02 0.20
16.80 3.29 1.04 0.20
17.10 3.31 1.05 0.19
17.40 3.33 1.07 0.18
17.70 3.35 1.08 0.18
18.00 3.37 1.09 0.17
18.30 3.39 1.11 0.17
18.60 3.41 1.12 0.16
18.90 3.43 1.13 0.15
19.20 3.44 1.14 0.15
19.50 3.46 1.15 0.14
19.80 3.47 1.16 0.13
20.10 3.49 1.17 0.13
20.40 3.50 1.18 0.12
20.70 3.52 1.19 0.12
21.00 3.53 1.20 0.12
21.30 3.54 1.21 0.12
21.60 3.56 1.22 0.11
21.90 3.57 1.23 0.11
22.20 3.58 1.24 0.11
22.50 3.60 1.25 0.11
22.80 3.61 1.25 0.11
23.10 3.62 1.26 0.11
23.40 3.64 1.27 0.11
23.70 3.65 1.28 0.11
24.00 3.66 1.29 0.11
Type II 24-hr 2 yr Rainfall=3.66"Site ContractorY10A
Printed 2/12/2018PreparedbyAECOM
Page57HydroCAD® 10.00-16 s/n 04851 © 2015 HydroCAD Software Solutions LLC
Summary for Subcatchment 124S: Pre Dev't
Runoff = 6.22 cfs @ 12.02 hrs, Volume= 0.341 af, Depth> 1.28"
Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-24.00 hrs, dt= 0.03 hrs
Type II 24-hr 2 yr Rainfall=3.66"
Area (ac) CN Description
3.190 73
3.190 100.00% Pervious Area
Tc Length Slope Velocity Capacity Description
min) (feet) (ft/ft) (ft/sec) (cfs)
10.0 Direct Entry,
Subcatchment 124S: Pre Dev't
Runoff
Hydrograph
Time (hours)
242220181614121086420Flow (
cfs)
6
5
4
3
2
1
0 Type II 24-
hr 2 yr Rainfall=3.
66"Runoff Area=3.190
ac Runoff Volume=0.341
af Runoff Depth>1.
28"Tc=10.0
min CN=
73 6.22
Type II 24-hr 2 yr Rainfall=3.66"Site ContractorY10A
Printed 2/12/2018PreparedbyAECOM
Page58HydroCAD® 10.00-16 s/n 04851 © 2015 HydroCAD Software Solutions LLC
Hydrograph for Subcatchment 124S: Pre Dev't
Time
hours)
Precip.
inches)
Excess
inches)
Runoff
cfs)
0.00 0.00 0.00 0.00
0.30 0.01 0.00 0.00
0.60 0.02 0.00 0.00
0.90 0.03 0.00 0.00
1.20 0.05 0.00 0.00
1.50 0.06 0.00 0.00
1.80 0.07 0.00 0.00
2.10 0.08 0.00 0.00
2.40 0.10 0.00 0.00
2.70 0.11 0.00 0.00
3.00 0.13 0.00 0.00
3.30 0.14 0.00 0.00
3.60 0.16 0.00 0.00
3.90 0.17 0.00 0.00
4.20 0.19 0.00 0.00
4.50 0.20 0.00 0.00
4.80 0.22 0.00 0.00
5.10 0.24 0.00 0.00
5.40 0.25 0.00 0.00
5.70 0.27 0.00 0.00
6.00 0.29 0.00 0.00
6.30 0.31 0.00 0.00
6.60 0.33 0.00 0.00
6.90 0.36 0.00 0.00
7.20 0.38 0.00 0.00
7.50 0.40 0.00 0.00
7.80 0.42 0.00 0.00
8.10 0.45 0.00 0.00
8.40 0.47 0.00 0.00
8.70 0.50 0.00 0.00
9.00 0.54 0.00 0.00
9.30 0.57 0.00 0.00
9.60 0.61 0.00 0.00
9.90 0.65 0.00 0.00
10.20 0.69 0.00 0.00
10.50 0.75 0.00 0.00
10.80 0.81 0.00 0.01
11.10 0.89 0.01 0.05
11.40 0.99 0.02 0.11
11.70 1.30 0.07 0.53
12.00 2.43 0.53 6.01
12.30 2.61 0.63 1.25
12.60 2.72 0.69 0.67
12.90 2.80 0.74 0.51
13.20 2.87 0.78 0.42
13.50 2.92 0.81 0.36
13.80 2.97 0.84 0.32
14.10 3.01 0.87 0.28
14.40 3.05 0.89 0.26
14.70 3.09 0.91 0.24
15.00 3.12 0.93 0.23
15.30 3.16 0.95 0.22
15.60 3.19 0.97 0.20
Time
hours)
Precip.
inches)
Excess
inches)
Runoff
cfs)
15.90 3.21 0.99 0.19
16.20 3.24 1.01 0.17
16.50 3.26 1.02 0.17
16.80 3.29 1.04 0.16
17.10 3.31 1.05 0.16
17.40 3.33 1.07 0.15
17.70 3.35 1.08 0.15
18.00 3.37 1.09 0.14
18.30 3.39 1.11 0.14
18.60 3.41 1.12 0.13
18.90 3.43 1.13 0.13
19.20 3.44 1.14 0.12
19.50 3.46 1.15 0.11
19.80 3.47 1.16 0.11
20.10 3.49 1.17 0.10
20.40 3.50 1.18 0.10
20.70 3.52 1.19 0.10
21.00 3.53 1.20 0.10
21.30 3.54 1.21 0.10
21.60 3.56 1.22 0.10
21.90 3.57 1.23 0.10
22.20 3.58 1.24 0.10
22.50 3.60 1.25 0.09
22.80 3.61 1.25 0.09
23.10 3.62 1.26 0.09
23.40 3.64 1.27 0.09
23.70 3.65 1.28 0.09
24.00 3.66 1.29 0.09
Type II 24-hr 2 yr Rainfall=3.66"Site ContractorY10A
Printed 2/12/2018PreparedbyAECOM
Page59HydroCAD® 10.00-16 s/n 04851 © 2015 HydroCAD Software Solutions LLC
Summary for Subcatchment 221S: Post CY (s)
Runoff = 75.53 cfs @ 12.06 hrs, Volume= 4.753 af, Depth> 2.32"
Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-24.00 hrs, dt= 0.03 hrs
Type II 24-hr 2 yr Rainfall=3.66"
Area (ac) CN Description
24.590 87
24.590 100.00% Pervious Area
Tc Length Slope Velocity Capacity Description
min) (feet) (ft/ft) (ft/sec) (cfs)
1.7 165 0.0212 1.59 Sheet Flow,
Smooth surfaces n= 0.011 P2= 3.36"
1.4 106 0.0038 1.25 Shallow Concentrated Flow,
Paved Kv= 20.3 fps
0.4 150 0.0220 6.67 80.08 Channel Flow,
Area= 12.0 sf Perim= 11.0' r= 1.09' n= 0.035
0.6 24 0.0083 0.71 0.03 Pipe Channel,
3.0" Round Area= 0.0 sf Perim= 0.8' r= 0.06'
n= 0.030 Corrugated metal
7.9 384 0.0016 0.81 Shallow Concentrated Flow,
Paved Kv= 20.3 fps
0.9 32 0.0063 0.62 0.03 Pipe Channel,
3.0" Round Area= 0.0 sf Perim= 0.8' r= 0.06'
n= 0.030
1.2 118 0.0110 1.69 Shallow Concentrated Flow,
Unpaved Kv= 16.1 fps
14.1 979 Total
Type II 24-hr 2 yr Rainfall=3.66"Site ContractorY10A
Printed 2/12/2018PreparedbyAECOM
Page60HydroCAD® 10.00-16 s/n 04851 © 2015 HydroCAD Software Solutions LLC
Subcatchment 221S: Post CY (s)
Runoff
Hydrograph
Time (hours)
242220181614121086420Flow (
cfs)
80
70
60
50
40
30
20
10
0 Type II 24-
hr 2 yr Rainfall=3.
66"Runoff Area=24.590
ac Runoff Volume=4.753
af Runoff Depth>2.
32"Flow Length=
979'Tc=14.1
min CN=
87 75.53
Type II 24-hr 2 yr Rainfall=3.66"Site ContractorY10A
Printed 2/12/2018PreparedbyAECOM
Page61HydroCAD® 10.00-16 s/n 04851 © 2015 HydroCAD Software Solutions LLC
Hydrograph for Subcatchment 221S: Post CY (s)
Time
hours)
Precip.
inches)
Excess
inches)
Runoff
cfs)
0.00 0.00 0.00 0.00
0.30 0.01 0.00 0.00
0.60 0.02 0.00 0.00
0.90 0.03 0.00 0.00
1.20 0.05 0.00 0.00
1.50 0.06 0.00 0.00
1.80 0.07 0.00 0.00
2.10 0.08 0.00 0.00
2.40 0.10 0.00 0.00
2.70 0.11 0.00 0.00
3.00 0.13 0.00 0.00
3.30 0.14 0.00 0.00
3.60 0.16 0.00 0.00
3.90 0.17 0.00 0.00
4.20 0.19 0.00 0.00
4.50 0.20 0.00 0.00
4.80 0.22 0.00 0.00
5.10 0.24 0.00 0.00
5.40 0.25 0.00 0.00
5.70 0.27 0.00 0.00
6.00 0.29 0.00 0.00
6.30 0.31 0.00 0.01
6.60 0.33 0.00 0.04
6.90 0.36 0.00 0.09
7.20 0.38 0.00 0.14
7.50 0.40 0.01 0.19
7.80 0.42 0.01 0.25
8.10 0.45 0.01 0.31
8.40 0.47 0.02 0.39
8.70 0.50 0.02 0.50
9.00 0.54 0.03 0.64
9.30 0.57 0.04 0.77
9.60 0.61 0.05 0.85
9.90 0.65 0.07 1.02
10.20 0.69 0.08 1.28
10.50 0.75 0.10 1.63
10.80 0.81 0.13 2.11
11.10 0.89 0.17 2.79
11.40 0.99 0.22 4.08
11.70 1.30 0.40 9.51
12.00 2.43 1.25 66.32
12.30 2.61 1.40 22.76
12.60 2.72 1.50 9.15
12.90 2.80 1.57 6.10
13.20 2.87 1.62 4.90
13.50 2.92 1.67 4.18
13.80 2.97 1.72 3.59
14.10 3.01 1.75 3.12
14.40 3.05 1.79 2.84
14.70 3.09 1.82 2.68
15.00 3.12 1.85 2.51
15.30 3.16 1.88 2.35
15.60 3.19 1.90 2.19
Time
hours)
Precip.
inches)
Excess
inches)
Runoff
cfs)
15.90 3.21 1.93 2.02
16.20 3.24 1.95 1.87
16.50 3.26 1.97 1.79
16.80 3.29 1.99 1.74
17.10 3.31 2.01 1.68
17.40 3.33 2.03 1.62
17.70 3.35 2.05 1.56
18.00 3.37 2.07 1.50
18.30 3.39 2.08 1.44
18.60 3.41 2.10 1.38
18.90 3.43 2.12 1.32
19.20 3.44 2.13 1.26
19.50 3.46 2.15 1.20
19.80 3.47 2.16 1.14
20.10 3.49 2.17 1.08
20.40 3.50 2.19 1.05
20.70 3.52 2.20 1.04
21.00 3.53 2.21 1.03
21.30 3.54 2.22 1.02
21.60 3.56 2.23 1.01
21.90 3.57 2.25 0.99
22.20 3.58 2.26 0.98
22.50 3.60 2.27 0.97
22.80 3.61 2.28 0.96
23.10 3.62 2.29 0.95
23.40 3.64 2.30 0.94
23.70 3.65 2.32 0.92
24.00 3.66 2.33 0.91
Type II 24-hr 2 yr Rainfall=3.66"Site ContractorY10A
Printed 2/12/2018PreparedbyAECOM
Page62HydroCAD® 10.00-16 s/n 04851 © 2015 HydroCAD Software Solutions LLC
Summary for Subcatchment 222S: Post CY (nw)
Runoff = 20.84 cfs @ 11.96 hrs, Volume= 0.957 af, Depth> 2.15"
Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-24.00 hrs, dt= 0.03 hrs
Type II 24-hr 2 yr Rainfall=3.66"
Area (ac) CN Description
5.330 85
5.330 100.00% Pervious Area
Tc Length Slope Velocity Capacity Description
min) (feet) (ft/ft) (ft/sec) (cfs)
5.0 Direct Entry,
Subcatchment 222S: Post CY (nw)
Runoff
Hydrograph
Time (hours)
242220181614121086420Flow (
cfs)
22
20
18
16
14
12
10
8
6
4
2
0 Type II 24-
hr 2 yr Rainfall=3.
66"Runoff Area=5.330
ac Runoff Volume=0.957
af Runoff Depth>2.
15"Tc=5.0
min CN=
85 20.84
Type II 24-hr 2 yr Rainfall=3.66"Site ContractorY10A
Printed 2/12/2018PreparedbyAECOM
Page63HydroCAD® 10.00-16 s/n 04851 © 2015 HydroCAD Software Solutions LLC
Hydrograph for Subcatchment 222S: Post CY (nw)
Time
hours)
Precip.
inches)
Excess
inches)
Runoff
cfs)
0.00 0.00 0.00 0.00
0.30 0.01 0.00 0.00
0.60 0.02 0.00 0.00
0.90 0.03 0.00 0.00
1.20 0.05 0.00 0.00
1.50 0.06 0.00 0.00
1.80 0.07 0.00 0.00
2.10 0.08 0.00 0.00
2.40 0.10 0.00 0.00
2.70 0.11 0.00 0.00
3.00 0.13 0.00 0.00
3.30 0.14 0.00 0.00
3.60 0.16 0.00 0.00
3.90 0.17 0.00 0.00
4.20 0.19 0.00 0.00
4.50 0.20 0.00 0.00
4.80 0.22 0.00 0.00
5.10 0.24 0.00 0.00
5.40 0.25 0.00 0.00
5.70 0.27 0.00 0.00
6.00 0.29 0.00 0.00
6.30 0.31 0.00 0.00
6.60 0.33 0.00 0.00
6.90 0.36 0.00 0.00
7.20 0.38 0.00 0.01
7.50 0.40 0.00 0.02
7.80 0.42 0.00 0.03
8.10 0.45 0.00 0.04
8.40 0.47 0.01 0.06
8.70 0.50 0.01 0.08
9.00 0.54 0.02 0.11
9.30 0.57 0.02 0.13
9.60 0.61 0.03 0.15
9.90 0.65 0.04 0.19
10.20 0.69 0.06 0.24
10.50 0.75 0.07 0.32
10.80 0.81 0.09 0.43
11.10 0.89 0.12 0.59
11.40 0.99 0.17 0.91
11.70 1.30 0.33 4.31
12.00 2.43 1.12 17.82
12.30 2.61 1.27 2.37
12.60 2.72 1.36 1.40
12.90 2.80 1.42 1.14
13.20 2.87 1.48 0.94
13.50 2.92 1.52 0.81
13.80 2.97 1.57 0.70
14.10 3.01 1.60 0.61
14.40 3.05 1.63 0.58
14.70 3.09 1.66 0.54
15.00 3.12 1.69 0.51
15.30 3.16 1.72 0.48
15.60 3.19 1.74 0.44
Time
hours)
Precip.
inches)
Excess
inches)
Runoff
cfs)
15.90 3.21 1.77 0.41
16.20 3.24 1.79 0.38
16.50 3.26 1.81 0.37
16.80 3.29 1.83 0.36
17.10 3.31 1.85 0.35
17.40 3.33 1.87 0.33
17.70 3.35 1.89 0.32
18.00 3.37 1.90 0.31
18.30 3.39 1.92 0.30
18.60 3.41 1.94 0.28
18.90 3.43 1.95 0.27
19.20 3.44 1.97 0.26
19.50 3.46 1.98 0.25
19.80 3.47 1.99 0.23
20.10 3.49 2.01 0.22
20.40 3.50 2.02 0.22
20.70 3.52 2.03 0.22
21.00 3.53 2.04 0.22
21.30 3.54 2.06 0.21
21.60 3.56 2.07 0.21
21.90 3.57 2.08 0.21
22.20 3.58 2.09 0.21
22.50 3.60 2.10 0.20
22.80 3.61 2.11 0.20
23.10 3.62 2.12 0.20
23.40 3.64 2.13 0.20
23.70 3.65 2.15 0.19
24.00 3.66 2.16 0.19
Type II 24-hr 2 yr Rainfall=3.66"Site ContractorY10A
Printed 2/12/2018PreparedbyAECOM
Page64HydroCAD® 10.00-16 s/n 04851 © 2015 HydroCAD Software Solutions LLC
Summary for Subcatchment 223S: Post CY (ne)
Runoff = 16.43 cfs @ 11.96 hrs, Volume= 0.774 af, Depth> 2.50"
Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-24.00 hrs, dt= 0.03 hrs
Type II 24-hr 2 yr Rainfall=3.66"
Area (ac) CN Description
3.710 89
3.710 100.00% Pervious Area
Tc Length Slope Velocity Capacity Description
min) (feet) (ft/ft) (ft/sec) (cfs)
5.0 Direct Entry,
Subcatchment 223S: Post CY (ne)
Runoff
Hydrograph
Time (hours)
242220181614121086420Flow (
cfs)
18
16
14
12
10
8
6
4
2
0 Type II 24-
hr 2 yr Rainfall=3.
66"Runoff Area=3.710
ac Runoff Volume=0.774
af Runoff Depth>2.
50"Tc=5.0
min CN=
89 16.43
Type II 24-hr 2 yr Rainfall=3.66"Site ContractorY10A
Printed 2/12/2018PreparedbyAECOM
Page65HydroCAD® 10.00-16 s/n 04851 © 2015 HydroCAD Software Solutions LLC
Hydrograph for Subcatchment 223S: Post CY (ne)
Time
hours)
Precip.
inches)
Excess
inches)
Runoff
cfs)
0.00 0.00 0.00 0.00
0.30 0.01 0.00 0.00
0.60 0.02 0.00 0.00
0.90 0.03 0.00 0.00
1.20 0.05 0.00 0.00
1.50 0.06 0.00 0.00
1.80 0.07 0.00 0.00
2.10 0.08 0.00 0.00
2.40 0.10 0.00 0.00
2.70 0.11 0.00 0.00
3.00 0.13 0.00 0.00
3.30 0.14 0.00 0.00
3.60 0.16 0.00 0.00
3.90 0.17 0.00 0.00
4.20 0.19 0.00 0.00
4.50 0.20 0.00 0.00
4.80 0.22 0.00 0.00
5.10 0.24 0.00 0.00
5.40 0.25 0.00 0.00
5.70 0.27 0.00 0.01
6.00 0.29 0.00 0.02
6.30 0.31 0.00 0.02
6.60 0.33 0.01 0.03
6.90 0.36 0.01 0.04
7.20 0.38 0.01 0.05
7.50 0.40 0.02 0.06
7.80 0.42 0.02 0.07
8.10 0.45 0.03 0.08
8.40 0.47 0.04 0.10
8.70 0.50 0.04 0.12
9.00 0.54 0.06 0.14
9.30 0.57 0.07 0.16
9.60 0.61 0.08 0.18
9.90 0.65 0.10 0.21
10.20 0.69 0.12 0.27
10.50 0.75 0.14 0.33
10.80 0.81 0.18 0.43
11.10 0.89 0.22 0.57
11.40 0.99 0.28 0.85
11.70 1.30 0.48 3.79
12.00 2.43 1.39 13.90
12.30 2.61 1.55 1.81
12.60 2.72 1.65 1.06
12.90 2.80 1.72 0.86
13.20 2.87 1.78 0.71
13.50 2.92 1.83 0.61
13.80 2.97 1.88 0.53
14.10 3.01 1.91 0.46
14.40 3.05 1.95 0.43
14.70 3.09 1.98 0.41
15.00 3.12 2.01 0.38
15.30 3.16 2.04 0.35
15.60 3.19 2.07 0.33
Time
hours)
Precip.
inches)
Excess
inches)
Runoff
cfs)
15.90 3.21 2.09 0.30
16.20 3.24 2.12 0.28
16.50 3.26 2.14 0.27
16.80 3.29 2.16 0.27
17.10 3.31 2.18 0.26
17.40 3.33 2.20 0.25
17.70 3.35 2.22 0.24
18.00 3.37 2.24 0.23
18.30 3.39 2.26 0.22
18.60 3.41 2.27 0.21
18.90 3.43 2.29 0.20
19.20 3.44 2.30 0.19
19.50 3.46 2.32 0.18
19.80 3.47 2.33 0.17
20.10 3.49 2.35 0.16
20.40 3.50 2.36 0.16
20.70 3.52 2.37 0.16
21.00 3.53 2.39 0.16
21.30 3.54 2.40 0.16
21.60 3.56 2.41 0.16
21.90 3.57 2.42 0.15
22.20 3.58 2.44 0.15
22.50 3.60 2.45 0.15
22.80 3.61 2.46 0.15
23.10 3.62 2.47 0.15
23.40 3.64 2.48 0.14
23.70 3.65 2.49 0.14
24.00 3.66 2.51 0.14
Type II 24-hr 2 yr Rainfall=3.66"Site ContractorY10A
Printed 2/12/2018PreparedbyAECOM
Page66HydroCAD® 10.00-16 s/n 04851 © 2015 HydroCAD Software Solutions LLC
Summary for Subcatchment 224S: Post CY (se)
Runoff = 6.08 cfs @ 11.97 hrs, Volume= 0.279 af, Depth> 1.05"
Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-24.00 hrs, dt= 0.03 hrs
Type II 24-hr 2 yr Rainfall=3.66"
Area (ac) CN Description
3.190 69
3.190 100.00% Pervious Area
Tc Length Slope Velocity Capacity Description
min) (feet) (ft/ft) (ft/sec) (cfs)
5.0 Direct Entry,
Subcatchment 224S: Post CY (se)
Runoff
Hydrograph
Time (hours)
242220181614121086420Flow (
cfs)
6
5
4
3
2
1
0 Type II 24-
hr 2 yr Rainfall=3.
66"Runoff Area=3.190
ac Runoff Volume=0.279
af Runoff Depth>1.
05"Tc=5.0
min CN=
69 6.08
Type II 24-hr 2 yr Rainfall=3.66"Site ContractorY10A
Printed 2/12/2018PreparedbyAECOM
Page67HydroCAD® 10.00-16 s/n 04851 © 2015 HydroCAD Software Solutions LLC
Hydrograph for Subcatchment 224S: Post CY (se)
Time
hours)
Precip.
inches)
Excess
inches)
Runoff
cfs)
0.00 0.00 0.00 0.00
0.30 0.01 0.00 0.00
0.60 0.02 0.00 0.00
0.90 0.03 0.00 0.00
1.20 0.05 0.00 0.00
1.50 0.06 0.00 0.00
1.80 0.07 0.00 0.00
2.10 0.08 0.00 0.00
2.40 0.10 0.00 0.00
2.70 0.11 0.00 0.00
3.00 0.13 0.00 0.00
3.30 0.14 0.00 0.00
3.60 0.16 0.00 0.00
3.90 0.17 0.00 0.00
4.20 0.19 0.00 0.00
4.50 0.20 0.00 0.00
4.80 0.22 0.00 0.00
5.10 0.24 0.00 0.00
5.40 0.25 0.00 0.00
5.70 0.27 0.00 0.00
6.00 0.29 0.00 0.00
6.30 0.31 0.00 0.00
6.60 0.33 0.00 0.00
6.90 0.36 0.00 0.00
7.20 0.38 0.00 0.00
7.50 0.40 0.00 0.00
7.80 0.42 0.00 0.00
8.10 0.45 0.00 0.00
8.40 0.47 0.00 0.00
8.70 0.50 0.00 0.00
9.00 0.54 0.00 0.00
9.30 0.57 0.00 0.00
9.60 0.61 0.00 0.00
9.90 0.65 0.00 0.00
10.20 0.69 0.00 0.00
10.50 0.75 0.00 0.00
10.80 0.81 0.00 0.00
11.10 0.89 0.00 0.00
11.40 0.99 0.00 0.03
11.70 1.30 0.03 0.54
12.00 2.43 0.39 5.48
12.30 2.61 0.47 0.83
12.60 2.72 0.53 0.50
12.90 2.80 0.57 0.42
13.20 2.87 0.60 0.35
13.50 2.92 0.63 0.30
13.80 2.97 0.66 0.27
14.10 3.01 0.68 0.23
14.40 3.05 0.70 0.22
14.70 3.09 0.72 0.21
15.00 3.12 0.74 0.20
15.30 3.16 0.75 0.19
15.60 3.19 0.77 0.17
Time
hours)
Precip.
inches)
Excess
inches)
Runoff
cfs)
15.90 3.21 0.79 0.16
16.20 3.24 0.80 0.15
16.50 3.26 0.81 0.15
16.80 3.29 0.83 0.14
17.10 3.31 0.84 0.14
17.40 3.33 0.85 0.13
17.70 3.35 0.87 0.13
18.00 3.37 0.88 0.12
18.30 3.39 0.89 0.12
18.60 3.41 0.90 0.12
18.90 3.43 0.91 0.11
19.20 3.44 0.92 0.11
19.50 3.46 0.93 0.10
19.80 3.47 0.94 0.10
20.10 3.49 0.95 0.09
20.40 3.50 0.96 0.09
20.70 3.52 0.96 0.09
21.00 3.53 0.97 0.09
21.30 3.54 0.98 0.09
21.60 3.56 0.99 0.09
21.90 3.57 1.00 0.09
22.20 3.58 1.01 0.09
22.50 3.60 1.01 0.08
22.80 3.61 1.02 0.08
23.10 3.62 1.03 0.08
23.40 3.64 1.04 0.08
23.70 3.65 1.04 0.08
24.00 3.66 1.05 0.08
Type II 24-hr 2 yr Rainfall=3.66"Site ContractorY10A
Printed 2/12/2018PreparedbyAECOM
Page68HydroCAD® 10.00-16 s/n 04851 © 2015 HydroCAD Software Solutions LLC
Summary for Pond 221P: 221
Inflow Area = 24.590 ac, 0.00% Impervious, Inflow Depth > 2.32" for 2 yr event
Inflow = 75.53 cfs @ 12.06 hrs, Volume= 4.753 af
Outflow = 4.00 cfs @ 13.58 hrs, Volume= 1.633 af, Atten= 95%, Lag= 91.3 min
Primary = 4.00 cfs @ 13.58 hrs, Volume= 1.633 af
Routing by Stor-Ind method, Time Span= 0.00-24.00 hrs, dt= 0.03 hrs
Peak Elev= 93.60' @ 13.58 hrs Surf.Area= 61,458 sf Storage= 139,996 cf
Plug-Flow detention time= 331.9 min calculated for 1.631 af (34% of inflow)
Center-of-Mass det. time= 207.9 min ( 1,023.6 - 815.7 )
Volume Invert Avail.Storage Storage Description
1 91.00' 196,497 cf Custom Stage Data (Prismatic) Listed below (Recalc)
Elevation Surf.Area Inc.Store Cum.Store
feet) (sq-ft) (cubic-feet) (cubic-feet)
91.00 29,222 0 0
91.50 51,128 20,088 20,088
92.00 54,024 26,288 46,376
92.50 56,935 27,740 74,115
93.00 59,864 29,200 103,315
94.00 62,500 61,182 164,497
94.50 65,500 32,000 196,497
Device Routing Invert Outlet Devices
1 Primary 93.50'50.0' long x 5.0' 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 3.50 4.00 4.50 5.00 5.50
Coef. (English) 2.34 2.50 2.70 2.68 2.68 2.66 2.65 2.65 2.65
2.65 2.67 2.66 2.68 2.70 2.74 2.79 2.88
Primary OutFlow Max=3.96 cfs @ 13.58 hrs HW=93.60' (Free Discharge)
1=Broad-Crested Rectangular Weir (Weir Controls 3.96 cfs @ 0.76 fps)
Type II 24-hr 2 yr Rainfall=3.66"Site ContractorY10A
Printed 2/12/2018PreparedbyAECOM
Page69HydroCAD® 10.00-16 s/n 04851 © 2015 HydroCAD Software Solutions LLC
Pond 221P: 221
Inflow
Primary
Hydrograph
Time (hours)
242220181614121086420Flow (
cfs)
80
70
60
50
40
30
20
10
0 Inflow Area=24.590
ac Peak Elev=93.
60'Storage=139,996
cf 75.53
cfs 4.00
cfs Pond 221P:
221
Primary Stage-
Discharge Discharge (
cfs)
1301201101009080706050403020100Elevation (
feet)
94
93
92 91 Broad-Crested
Type II 24-hr 2 yr Rainfall=3.66"Site ContractorY10A
Printed 2/12/2018PreparedbyAECOM
Page70HydroCAD® 10.00-16 s/n 04851 © 2015 HydroCAD Software Solutions LLC
Pond 221P: 221
Surface
Storage
Stage-Area-Storage
Storage (cubic-feet)
150,000100,00050,0000
Surface/Horizontal/Wetted Area (sq-ft)
60,00050,00040,00030,00020,00010,0000
Elevation (
feet)
94
93
92 91 Custom
Type II 24-hr 2 yr Rainfall=3.66"Site ContractorY10A
Printed 2/12/2018PreparedbyAECOM
Page71HydroCAD® 10.00-16 s/n 04851 © 2015 HydroCAD Software Solutions LLC
Hydrograph for Pond 221P: 221
Time
hours)
Inflow
cfs)
Storage
cubic-feet)
Elevation
feet)
Primary
cfs)
0.00 0.00 0 91.00 0.00
0.60 0.00 0 91.00 0.00
1.20 0.00 0 91.00 0.00
1.80 0.00 0 91.00 0.00
2.40 0.00 0 91.00 0.00
3.00 0.00 0 91.00 0.00
3.60 0.00 0 91.00 0.00
4.20 0.00 0 91.00 0.00
4.80 0.00 0 91.00 0.00
5.40 0.00 0 91.00 0.00
6.00 0.00 0 91.00 0.00
6.60 0.04 26 91.00 0.00
7.20 0.14 225 91.01 0.00
7.80 0.25 646 91.02 0.00
8.40 0.39 1,317 91.04 0.00
9.00 0.64 2,413 91.08 0.00
9.60 0.85 4,052 91.13 0.00
10.20 1.28 6,288 91.19 0.00
10.80 2.11 9,849 91.28 0.00
11.40 4.08 16,114 91.42 0.00
12.00 66.32 55,151 92.16 0.00
12.60 9.15 127,657 93.40 0.00
13.20 4.90 139,070 93.59 3.14
13.80 3.59 139,861 93.60 3.88
14.40 2.84 139,080 93.59 3.15
15.00 2.51 138,537 93.58 2.73
15.60 2.19 138,091 93.57 2.39
16.20 1.87 137,661 93.57 2.06
16.80 1.74 137,367 93.56 1.83
17.40 1.62 137,187 93.56 1.69
18.00 1.50 137,029 93.56 1.57
18.60 1.38 136,868 93.55 1.47
19.20 1.26 136,672 93.55 1.36
19.80 1.14 136,461 93.55 1.24
20.40 1.05 136,255 93.54 1.13
21.00 1.03 136,140 93.54 1.07
21.60 1.01 136,075 93.54 1.03
22.20 0.98 136,026 93.54 1.00
22.80 0.96 135,982 93.54 0.98
23.40 0.94 135,938 93.54 0.96
24.00 0.91 135,895 93.54 0.93
Type II 24-hr 2 yr Rainfall=3.66"Site ContractorY10A
Printed 2/12/2018PreparedbyAECOM
Page72HydroCAD® 10.00-16 s/n 04851 © 2015 HydroCAD Software Solutions LLC
Stage-Discharge for Pond 221P: 221
Elevation
feet)
Primary
cfs)
91.00 0.00
91.02 0.00
91.04 0.00
91.06 0.00
91.08 0.00
91.10 0.00
91.12 0.00
91.14 0.00
91.16 0.00
91.18 0.00
91.20 0.00
91.22 0.00
91.24 0.00
91.26 0.00
91.28 0.00
91.30 0.00
91.32 0.00
91.34 0.00
91.36 0.00
91.38 0.00
91.40 0.00
91.42 0.00
91.44 0.00
91.46 0.00
91.48 0.00
91.50 0.00
91.52 0.00
91.54 0.00
91.56 0.00
91.58 0.00
91.60 0.00
91.62 0.00
91.64 0.00
91.66 0.00
91.68 0.00
91.70 0.00
91.72 0.00
91.74 0.00
91.76 0.00
91.78 0.00
91.80 0.00
91.82 0.00
91.84 0.00
91.86 0.00
91.88 0.00
91.90 0.00
91.92 0.00
91.94 0.00
91.96 0.00
91.98 0.00
92.00 0.00
92.02 0.00
92.04 0.00
Elevation
feet)
Primary
cfs)
92.06 0.00
92.08 0.00
92.10 0.00
92.12 0.00
92.14 0.00
92.16 0.00
92.18 0.00
92.20 0.00
92.22 0.00
92.24 0.00
92.26 0.00
92.28 0.00
92.30 0.00
92.32 0.00
92.34 0.00
92.36 0.00
92.38 0.00
92.40 0.00
92.42 0.00
92.44 0.00
92.46 0.00
92.48 0.00
92.50 0.00
92.52 0.00
92.54 0.00
92.56 0.00
92.58 0.00
92.60 0.00
92.62 0.00
92.64 0.00
92.66 0.00
92.68 0.00
92.70 0.00
92.72 0.00
92.74 0.00
92.76 0.00
92.78 0.00
92.80 0.00
92.82 0.00
92.84 0.00
92.86 0.00
92.88 0.00
92.90 0.00
92.92 0.00
92.94 0.00
92.96 0.00
92.98 0.00
93.00 0.00
93.02 0.00
93.04 0.00
93.06 0.00
93.08 0.00
93.10 0.00
Elevation
feet)
Primary
cfs)
93.12 0.00
93.14 0.00
93.16 0.00
93.18 0.00
93.20 0.00
93.22 0.00
93.24 0.00
93.26 0.00
93.28 0.00
93.30 0.00
93.32 0.00
93.34 0.00
93.36 0.00
93.38 0.00
93.40 0.00
93.42 0.00
93.44 0.00
93.46 0.00
93.48 0.00
93.50 0.00
93.52 0.33
93.54 0.94
93.56 1.72
93.58 2.65
93.60 3.70
93.62 4.86
93.64 6.13
93.66 7.49
93.68 8.94
93.70 10.46
93.72 12.16
93.74 13.94
93.76 15.83
93.78 17.81
93.80 19.88
93.82 22.05
93.84 24.31
93.86 26.65
93.88 29.09
93.90 31.62
93.92 34.30
93.94 37.07
93.96 39.93
93.98 42.90
94.00 45.96
94.02 49.12
94.04 52.38
94.06 55.74
94.08 59.19
94.10 62.74
94.12 65.86
94.14 69.02
94.16 72.22
Elevation
feet)
Primary
cfs)
94.18 75.48
94.20 78.77
94.22 82.11
94.24 85.49
94.26 88.91
94.28 92.38
94.30 95.88
94.32 99.50
94.34 103.16
94.36 106.87
94.38 110.62
94.40 114.41
94.42 118.25
94.44 122.12
94.46 126.04
94.48 130.00
94.50 134.00
Type II 24-hr 2 yr Rainfall=3.66"Site ContractorY10A
Printed 2/12/2018PreparedbyAECOM
Page73HydroCAD® 10.00-16 s/n 04851 © 2015 HydroCAD Software Solutions LLC
Stage-Area-Storage for Pond 221P: 221
Elevation
feet)
Surface
sq-ft)
Storage
cubic-feet)
91.00 29,222 0
91.05 31,413 1,516
91.10 33,603 3,141
91.15 35,794 4,876
91.20 37,984 6,721
91.25 40,175 8,675
91.30 42,366 10,738
91.35 44,556 12,911
91.40 46,747 15,194
91.45 48,937 17,586
91.50 51,128 20,088
91.55 51,418 22,651
91.60 51,707 25,229
91.65 51,997 27,822
91.70 52,286 30,429
91.75 52,576 33,051
91.80 52,866 35,687
91.85 53,155 38,337
91.90 53,445 41,002
91.95 53,734 43,682
92.00 54,024 46,376
92.05 54,315 49,084
92.10 54,606 51,807
92.15 54,897 54,545
92.20 55,188 57,297
92.25 55,480 60,063
92.30 55,771 62,845
92.35 56,062 65,640
92.40 56,353 68,451
92.45 56,644 71,276
92.50 56,935 74,115
92.55 57,228 76,969
92.60 57,521 79,838
92.65 57,814 82,721
92.70 58,107 85,619
92.75 58,400 88,532
92.80 58,692 91,459
92.85 58,985 94,401
92.90 59,278 97,358
92.95 59,571 100,329
93.00 59,864 103,315
93.05 59,996 106,311
93.10 60,128 109,315
93.15 60,259 112,324
93.20 60,391 115,341
93.25 60,523 118,363
93.30 60,655 121,393
93.35 60,787 124,429
93.40 60,918 127,471
93.45 61,050 130,521
93.50 61,182 133,577
93.55 61,314 136,639
93.60 61,446 139,708
Elevation
feet)
Surface
sq-ft)
Storage
cubic-feet)
93.65 61,577 142,783
93.70 61,709 145,866
93.75 61,841 148,954
93.80 61,973 152,050
93.85 62,105 155,152
93.90 62,236 158,260
93.95 62,368 161,375
94.00 62,500 164,497
94.05 62,800 167,629
94.10 63,100 170,777
94.15 63,400 173,940
94.20 63,700 177,117
94.25 64,000 180,310
94.30 64,300 183,517
94.35 64,600 186,739
94.40 64,900 189,977
94.45 65,200 193,230
94.50 65,500 196,497
Type II 24-hr 2 yr Rainfall=3.66"Site ContractorY10A
Printed 2/12/2018PreparedbyAECOM
Page74HydroCAD® 10.00-16 s/n 04851 © 2015 HydroCAD Software Solutions LLC
Summary for Pond 222P: SF
Inflow Area = 5.330 ac, 0.00% Impervious, Inflow Depth > 2.15" for 2 yr event
Inflow = 20.84 cfs @ 11.96 hrs, Volume= 0.957 af
Outflow = 0.81 cfs @ 13.50 hrs, Volume= 0.329 af, Atten= 96%, Lag= 92.4 min
Primary = 0.81 cfs @ 13.50 hrs, Volume= 0.329 af
Routing by Stor-Ind method, Time Span= 0.00-24.00 hrs, dt= 0.03 hrs
Peak Elev= 92.04' @ 13.50 hrs Surf.Area= 27,424 sf Storage= 28,003 cf
Plug-Flow detention time= 335.6 min calculated for 0.329 af (34% of inflow)
Center-of-Mass det. time= 211.3 min ( 1,026.9 - 815.6 )
Volume Invert Avail.Storage Storage Description
1 90.50' 55,826 cf Custom Stage Data (Prismatic) Listed below (Recalc)
Elevation Surf.Area Inc.Store Cum.Store
feet) (sq-ft) (cubic-feet) (cubic-feet)
90.50 4,842 0 0
91.00 18,475 5,829 5,829
91.50 19,525 9,500 15,329
92.00 27,321 11,712 27,041
93.00 30,250 28,786 55,826
Device Routing Invert Outlet Devices
1 Primary 92.00'50.0' long x 5.0' 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 3.50 4.00 4.50 5.00 5.50
Coef. (English) 2.34 2.50 2.70 2.68 2.68 2.66 2.65 2.65 2.65
2.65 2.67 2.66 2.68 2.70 2.74 2.79 2.88
Primary OutFlow Max=0.77 cfs @ 13.50 hrs HW=92.04' (Free Discharge)
1=Broad-Crested Rectangular Weir (Weir Controls 0.77 cfs @ 0.44 fps)
Type II 24-hr 2 yr Rainfall=3.66"Site ContractorY10A
Printed 2/12/2018PreparedbyAECOM
Page75HydroCAD® 10.00-16 s/n 04851 © 2015 HydroCAD Software Solutions LLC
Pond 222P: SF
Inflow
Primary
Hydrograph
Time (hours)
242220181614121086420Flow (
cfs)
22
20
18
16
14
12
10
8
6
4
2
0 Inflow Area=5.330
ac Peak Elev=92.
04'Storage=28,003
cf 20.84
cfs 0.81
cfs Pond 222P:
SF
Primary Stage-
Discharge Discharge (
cfs)
1301201101009080706050403020100Elevation (
feet)
93
92 91 Broad-Crested
Type II 24-hr 2 yr Rainfall=3.66"Site ContractorY10A
Printed 2/12/2018PreparedbyAECOM
Page76HydroCAD® 10.00-16 s/n 04851 © 2015 HydroCAD Software Solutions LLC
Pond 222P: SF
Surface
Storage
Stage-Area-Storage
Storage (cubic-feet)
40,00020,0000
Surface/Horizontal/Wetted Area (sq-ft)
30,00025,00020,00015,00010,0005,0000
Elevation (
feet)
93
92 91 Custom
Type II 24-hr 2 yr Rainfall=3.66"Site ContractorY10A
Printed 2/12/2018PreparedbyAECOM
Page77HydroCAD® 10.00-16 s/n 04851 © 2015 HydroCAD Software Solutions LLC
Hydrograph for Pond 222P: SF
Time
hours)
Inflow
cfs)
Storage
cubic-feet)
Elevation
feet)
Primary
cfs)
0.00 0.00 0 90.50 0.00
0.60 0.00 0 90.50 0.00
1.20 0.00 0 90.50 0.00
1.80 0.00 0 90.50 0.00
2.40 0.00 0 90.50 0.00
3.00 0.00 0 90.50 0.00
3.60 0.00 0 90.50 0.00
4.20 0.00 0 90.50 0.00
4.80 0.00 0 90.50 0.00
5.40 0.00 0 90.50 0.00
6.00 0.00 0 90.50 0.00
6.60 0.00 0 90.50 0.00
7.20 0.01 4 90.50 0.00
7.80 0.03 44 90.51 0.00
8.40 0.06 134 90.53 0.00
9.00 0.11 310 90.56 0.00
9.60 0.15 584 90.59 0.00
10.20 0.24 996 90.65 0.00
10.80 0.43 1,698 90.72 0.00
11.40 0.91 3,039 90.83 0.00
12.00 17.82 18,053 91.63 0.00
12.60 1.40 25,874 91.96 0.00
13.20 0.94 27,886 92.03 0.66
13.80 0.70 27,963 92.03 0.76
14.40 0.58 27,845 92.03 0.61
15.00 0.51 27,784 92.03 0.54
15.60 0.44 27,728 92.03 0.47
16.20 0.38 27,655 92.02 0.42
16.80 0.36 27,600 92.02 0.38
17.40 0.33 27,560 92.02 0.35
18.00 0.31 27,523 92.02 0.33
18.60 0.28 27,486 92.02 0.30
19.20 0.26 27,449 92.01 0.28
19.80 0.23 27,412 92.01 0.25
20.40 0.22 27,380 92.01 0.23
21.00 0.22 27,366 92.01 0.22
21.60 0.21 27,357 92.01 0.21
22.20 0.21 27,350 92.01 0.21
22.80 0.20 27,342 92.01 0.20
23.40 0.20 27,335 92.01 0.20
24.00 0.19 27,328 92.01 0.19
Type II 24-hr 2 yr Rainfall=3.66"Site ContractorY10A
Printed 2/12/2018PreparedbyAECOM
Page78HydroCAD® 10.00-16 s/n 04851 © 2015 HydroCAD Software Solutions LLC
Stage-Discharge for Pond 222P: SF
Elevation
feet)
Primary
cfs)
90.50 0.00
90.52 0.00
90.54 0.00
90.56 0.00
90.58 0.00
90.60 0.00
90.62 0.00
90.64 0.00
90.66 0.00
90.68 0.00
90.70 0.00
90.72 0.00
90.74 0.00
90.76 0.00
90.78 0.00
90.80 0.00
90.82 0.00
90.84 0.00
90.86 0.00
90.88 0.00
90.90 0.00
90.92 0.00
90.94 0.00
90.96 0.00
90.98 0.00
91.00 0.00
91.02 0.00
91.04 0.00
91.06 0.00
91.08 0.00
91.10 0.00
91.12 0.00
91.14 0.00
91.16 0.00
91.18 0.00
91.20 0.00
91.22 0.00
91.24 0.00
91.26 0.00
91.28 0.00
91.30 0.00
91.32 0.00
91.34 0.00
91.36 0.00
91.38 0.00
91.40 0.00
91.42 0.00
91.44 0.00
91.46 0.00
91.48 0.00
91.50 0.00
91.52 0.00
91.54 0.00
Elevation
feet)
Primary
cfs)
91.56 0.00
91.58 0.00
91.60 0.00
91.62 0.00
91.64 0.00
91.66 0.00
91.68 0.00
91.70 0.00
91.72 0.00
91.74 0.00
91.76 0.00
91.78 0.00
91.80 0.00
91.82 0.00
91.84 0.00
91.86 0.00
91.88 0.00
91.90 0.00
91.92 0.00
91.94 0.00
91.96 0.00
91.98 0.00
92.00 0.00
92.02 0.33
92.04 0.94
92.06 1.72
92.08 2.65
92.10 3.70
92.12 4.86
92.14 6.13
92.16 7.49
92.18 8.94
92.20 10.46
92.22 12.16
92.24 13.94
92.26 15.83
92.28 17.81
92.30 19.88
92.32 22.05
92.34 24.31
92.36 26.65
92.38 29.09
92.40 31.62
92.42 34.30
92.44 37.07
92.46 39.93
92.48 42.90
92.50 45.96
92.52 49.12
92.54 52.38
92.56 55.74
92.58 59.19
92.60 62.74
Elevation
feet)
Primary
cfs)
92.62 65.86
92.64 69.02
92.66 72.22
92.68 75.48
92.70 78.77
92.72 82.11
92.74 85.49
92.76 88.91
92.78 92.38
92.80 95.88
92.82 99.50
92.84 103.16
92.86 106.87
92.88 110.62
92.90 114.41
92.92 118.25
92.94 122.12
92.96 126.04
92.98 130.00
93.00 134.00
Type II 24-hr 2 yr Rainfall=3.66"Site ContractorY10A
Printed 2/12/2018PreparedbyAECOM
Page79HydroCAD® 10.00-16 s/n 04851 © 2015 HydroCAD Software Solutions LLC
Stage-Area-Storage for Pond 222P: SF
Elevation
feet)
Surface
sq-ft)
Storage
cubic-feet)
90.50 4,842 0
90.55 6,205 276
90.60 7,569 621
90.65 8,932 1,033
90.70 10,295 1,514
90.75 11,659 2,063
90.80 13,022 2,680
90.85 14,385 3,365
90.90 15,748 4,118
90.95 17,112 4,940
91.00 18,475 5,829
91.05 18,580 6,756
91.10 18,685 7,687
91.15 18,790 8,624
91.20 18,895 9,566
91.25 19,000 10,514
91.30 19,105 11,466
91.35 19,210 12,424
91.40 19,315 13,387
91.45 19,420 14,356
91.50 19,525 15,329
91.55 20,305 16,325
91.60 21,084 17,360
91.65 21,864 18,433
91.70 22,643 19,546
91.75 23,423 20,698
91.80 24,203 21,888
91.85 24,982 23,118
91.90 25,762 24,387
91.95 26,541 25,694
92.00 27,321 27,041
92.05 27,467 28,410
92.10 27,614 29,787
92.15 27,760 31,172
92.20 27,907 32,564
92.25 28,053 33,963
92.30 28,200 35,369
92.35 28,346 36,783
92.40 28,493 38,203
92.45 28,639 39,632
92.50 28,786 41,067
92.55 28,932 42,510
92.60 29,078 43,961
92.65 29,225 45,418
92.70 29,371 46,883
92.75 29,518 48,355
92.80 29,664 49,835
92.85 29,811 51,322
92.90 29,957 52,816
92.95 30,104 54,317
93.00 30,250 55,826
Type II 24-hr 2 yr Rainfall=3.66"Site ContractorY10A
Printed 2/12/2018PreparedbyAECOM
Page80HydroCAD® 10.00-16 s/n 04851 © 2015 HydroCAD Software Solutions LLC
Summary for Pond 223P: 223
Inflow Area = 3.710 ac, 0.00% Impervious, Inflow Depth > 2.50" for 2 yr event
Inflow = 16.43 cfs @ 11.96 hrs, Volume= 0.774 af
Outflow = 0.20 cfs @ 19.08 hrs, Volume= 0.072 af, Atten= 99%, Lag= 427.3 min
Primary = 0.20 cfs @ 19.08 hrs, Volume= 0.072 af
Routing by Stor-Ind method, Time Span= 0.00-24.00 hrs, dt= 0.03 hrs
Peak Elev= 94.01' @ 19.08 hrs Surf.Area= 13,270 sf Storage= 30,596 cf
Plug-Flow detention time= 678.4 min calculated for 0.072 af (9% of inflow)
Center-of-Mass det. time= 469.3 min ( 1,270.5 - 801.2 )
Volume Invert Avail.Storage Storage Description
1 90.50' 44,430 cf Custom Stage Data (Prismatic) Listed below (Recalc)
Elevation Surf.Area Inc.Store Cum.Store
feet) (sq-ft) (cubic-feet) (cubic-feet)
90.50 5,898 0 0
92.00 7,314 9,909 9,909
92.50 8,772 4,022 13,931
93.00 10,247 4,755 18,685
93.50 11,740 5,497 24,182
94.00 13,251 6,248 30,430
95.00 14,750 14,001 44,430
Device Routing Invert Outlet Devices
1 Primary 94.00'50.0' long x 5.0' 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 3.50 4.00 4.50 5.00 5.50
Coef. (English) 2.34 2.50 2.70 2.68 2.68 2.66 2.65 2.65 2.65
2.65 2.67 2.66 2.68 2.70 2.74 2.79 2.88
Primary OutFlow Max=0.16 cfs @ 19.08 hrs HW=94.01' (Free Discharge)
1=Broad-Crested Rectangular Weir (Weir Controls 0.16 cfs @ 0.26 fps)
Type II 24-hr 2 yr Rainfall=3.66"Site ContractorY10A
Printed 2/12/2018PreparedbyAECOM
Page81HydroCAD® 10.00-16 s/n 04851 © 2015 HydroCAD Software Solutions LLC
Pond 223P: 223
Inflow
Primary
Hydrograph
Time (hours)
242220181614121086420Flow (
cfs)
18
16
14
12
10
8
6
4
2
0 Inflow Area=3.710
ac Peak Elev=94.
01'Storage=30,596
cf 16.43
cfs 0.20
cfs Pond 223P:
223
Primary Stage-
Discharge Discharge (
cfs)
1301201101009080706050403020100Elevation (
feet)
95
94
93
92 91 Broad-Crested
Type II 24-hr 2 yr Rainfall=3.66"Site ContractorY10A
Printed 2/12/2018PreparedbyAECOM
Page82HydroCAD® 10.00-16 s/n 04851 © 2015 HydroCAD Software Solutions LLC
Pond 223P: 223
Surface
Storage
Stage-Area-Storage
Storage (cubic-feet)
40,00030,00020,00010,0000
Surface/Horizontal/Wetted Area (sq-ft)
14,00012,00010,0008,0006,0004,0002,0000
Elevation (
feet)
95
94
93 92 91 Custom
Type II 24-hr 2 yr Rainfall=3.66"Site ContractorY10A
Printed 2/12/2018PreparedbyAECOM
Page83HydroCAD® 10.00-16 s/n 04851 © 2015 HydroCAD Software Solutions LLC
Hydrograph for Pond 223P: 223
Time
hours)
Inflow
cfs)
Storage
cubic-feet)
Elevation
feet)
Primary
cfs)
0.00 0.00 0 90.50 0.00
0.60 0.00 0 90.50 0.00
1.20 0.00 0 90.50 0.00
1.80 0.00 0 90.50 0.00
2.40 0.00 0 90.50 0.00
3.00 0.00 0 90.50 0.00
3.60 0.00 0 90.50 0.00
4.20 0.00 0 90.50 0.00
4.80 0.00 0 90.50 0.00
5.40 0.00 0 90.50 0.00
6.00 0.02 17 90.50 0.00
6.60 0.03 67 90.51 0.00
7.20 0.05 153 90.53 0.00
7.80 0.07 277 90.55 0.00
8.40 0.10 448 90.58 0.00
9.00 0.14 705 90.62 0.00
9.60 0.18 1,051 90.68 0.00
10.20 0.27 1,519 90.75 0.00
10.80 0.43 2,250 90.87 0.00
11.40 0.85 3,542 91.07 0.00
12.00 13.90 15,919 92.72 0.00
12.60 1.06 21,929 93.30 0.00
13.20 0.71 23,792 93.47 0.00
13.80 0.53 25,109 93.58 0.00
14.40 0.43 26,116 93.66 0.00
15.00 0.38 26,993 93.73 0.00
15.60 0.33 27,759 93.79 0.00
16.20 0.28 28,415 93.85 0.00
16.80 0.27 29,009 93.89 0.00
17.40 0.25 29,563 93.93 0.00
18.00 0.23 30,078 93.97 0.00
18.60 0.21 30,526 94.01 0.08
19.20 0.19 30,596 94.01 0.19
19.80 0.17 30,588 94.01 0.18
20.40 0.16 30,582 94.01 0.16
21.00 0.16 30,581 94.01 0.16
21.60 0.16 30,579 94.01 0.16
22.20 0.15 30,577 94.01 0.15
22.80 0.15 30,576 94.01 0.15
23.40 0.14 30,574 94.01 0.14
24.00 0.14 30,573 94.01 0.14
Type II 24-hr 2 yr Rainfall=3.66"Site ContractorY10A
Printed 2/12/2018PreparedbyAECOM
Page84HydroCAD® 10.00-16 s/n 04851 © 2015 HydroCAD Software Solutions LLC
Stage-Discharge for Pond 223P: 223
Elevation
feet)
Primary
cfs)
90.50 0.00
90.55 0.00
90.60 0.00
90.65 0.00
90.70 0.00
90.75 0.00
90.80 0.00
90.85 0.00
90.90 0.00
90.95 0.00
91.00 0.00
91.05 0.00
91.10 0.00
91.15 0.00
91.20 0.00
91.25 0.00
91.30 0.00
91.35 0.00
91.40 0.00
91.45 0.00
91.50 0.00
91.55 0.00
91.60 0.00
91.65 0.00
91.70 0.00
91.75 0.00
91.80 0.00
91.85 0.00
91.90 0.00
91.95 0.00
92.00 0.00
92.05 0.00
92.10 0.00
92.15 0.00
92.20 0.00
92.25 0.00
92.30 0.00
92.35 0.00
92.40 0.00
92.45 0.00
92.50 0.00
92.55 0.00
92.60 0.00
92.65 0.00
92.70 0.00
92.75 0.00
92.80 0.00
92.85 0.00
92.90 0.00
92.95 0.00
93.00 0.00
93.05 0.00
93.10 0.00
Elevation
feet)
Primary
cfs)
93.15 0.00
93.20 0.00
93.25 0.00
93.30 0.00
93.35 0.00
93.40 0.00
93.45 0.00
93.50 0.00
93.55 0.00
93.60 0.00
93.65 0.00
93.70 0.00
93.75 0.00
93.80 0.00
93.85 0.00
93.90 0.00
93.95 0.00
94.00 0.00
94.05 1.31
94.10 3.70
94.15 6.80
94.20 10.46
94.25 14.88
94.30 19.88
94.35 25.47
94.40 31.62
94.45 38.49
94.50 45.96
94.55 54.05
94.60 62.74
94.65 70.62
94.70 78.77
94.75 87.20
94.80 95.88
94.85 105.01
94.90 114.41
94.95 124.08
95.00 134.00
Type II 24-hr 2 yr Rainfall=3.66"Site ContractorY10A
Printed 2/12/2018PreparedbyAECOM
Page85HydroCAD® 10.00-16 s/n 04851 © 2015 HydroCAD Software Solutions LLC
Stage-Area-Storage for Pond 223P: 223
Elevation
feet)
Surface
sq-ft)
Storage
cubic-feet)
90.50 5,898 0
90.55 5,945 296
90.60 5,992 595
90.65 6,040 895
90.70 6,087 1,198
90.75 6,134 1,504
90.80 6,181 1,812
90.85 6,228 2,122
90.90 6,276 2,435
90.95 6,323 2,750
91.00 6,370 3,067
91.05 6,417 3,387
91.10 6,464 3,709
91.15 6,512 4,033
91.20 6,559 4,360
91.25 6,606 4,689
91.30 6,653 5,020
91.35 6,700 5,354
91.40 6,748 5,691
91.45 6,795 6,029
91.50 6,842 6,370
91.55 6,889 6,713
91.60 6,936 7,059
91.65 6,984 7,407
91.70 7,031 7,757
91.75 7,078 8,110
91.80 7,125 8,465
91.85 7,172 8,823
91.90 7,220 9,182
91.95 7,267 9,544
92.00 7,314 9,909
92.05 7,460 10,278
92.10 7,606 10,655
92.15 7,751 11,039
92.20 7,897 11,430
92.25 8,043 11,829
92.30 8,189 12,234
92.35 8,335 12,648
92.40 8,480 13,068
92.45 8,626 13,496
92.50 8,772 13,931
92.55 8,919 14,373
92.60 9,067 14,822
92.65 9,215 15,279
92.70 9,362 15,744
92.75 9,510 16,216
92.80 9,657 16,695
92.85 9,804 17,181
92.90 9,952 17,675
92.95 10,100 18,177
93.00 10,247 18,685
93.05 10,396 19,201
93.10 10,546 19,725
Elevation
feet)
Surface
sq-ft)
Storage
cubic-feet)
93.15 10,695 20,256
93.20 10,844 20,794
93.25 10,994 21,340
93.30 11,143 21,894
93.35 11,292 22,455
93.40 11,441 23,023
93.45 11,591 23,599
93.50 11,740 24,182
93.55 11,891 24,773
93.60 12,042 25,371
93.65 12,193 25,977
93.70 12,344 26,590
93.75 12,496 27,211
93.80 12,647 27,840
93.85 12,798 28,476
93.90 12,949 29,120
93.95 13,100 29,771
94.00 13,251 30,430
94.05 13,326 31,094
94.10 13,401 31,762
94.15 13,476 32,434
94.20 13,551 33,110
94.25 13,626 33,789
94.30 13,701 34,473
94.35 13,776 35,159
94.40 13,851 35,850
94.45 13,926 36,544
94.50 14,001 37,243
94.55 14,075 37,945
94.60 14,150 38,650
94.65 14,225 39,360
94.70 14,300 40,073
94.75 14,375 40,790
94.80 14,450 41,510
94.85 14,525 42,235
94.90 14,600 42,963
94.95 14,675 43,695
95.00 14,750 44,430
Type II 24-hr 2 yr Rainfall=3.66"Site ContractorY10A
Printed 2/12/2018PreparedbyAECOM
Page86HydroCAD® 10.00-16 s/n 04851 © 2015 HydroCAD Software Solutions LLC
Summary for Pond 224P: 224
Inflow Area = 3.190 ac, 0.00% Impervious, Inflow Depth > 1.05" for 2 yr event
Inflow = 6.08 cfs @ 11.97 hrs, Volume= 0.279 af
Outflow = 0.00 cfs @ 0.00 hrs, Volume= 0.000 af, Atten= 100%, Lag= 0.0 min
Primary = 0.00 cfs @ 0.00 hrs, Volume= 0.000 af
Routing by Stor-Ind method, Time Span= 0.00-24.00 hrs, dt= 0.03 hrs
Peak Elev= 91.73' @ 24.00 hrs Surf.Area= 8,666 sf Storage= 12,150 cf
Plug-Flow detention time= (not calculated: initial storage exceeds outflow)
Center-of-Mass det. time= (not calculated: no outflow)
Volume Invert Avail.Storage Storage Description
1 90.00' 24,373 cf Custom Stage Data (Prismatic) Listed below (Recalc)
Elevation Surf.Area Inc.Store Cum.Store
feet) (sq-ft) (cubic-feet) (cubic-feet)
90.00 5,642 0 0
90.50 6,177 2,955 2,955
91.00 7,286 3,366 6,321
91.50 8,188 3,869 10,189
92.00 9,216 4,351 14,540
93.00 10,450 9,833 24,373
Device Routing Invert Outlet Devices
1 Primary 92.00'50.0' long x 5.0' 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 3.50 4.00 4.50 5.00 5.50
Coef. (English) 2.34 2.50 2.70 2.68 2.68 2.66 2.65 2.65 2.65
2.65 2.67 2.66 2.68 2.70 2.74 2.79 2.88
Primary OutFlow Max=0.00 cfs @ 0.00 hrs HW=90.00' (Free Discharge)
1=Broad-Crested Rectangular Weir ( Controls 0.00 cfs)
Type II 24-hr 2 yr Rainfall=3.66"Site ContractorY10A
Printed 2/12/2018PreparedbyAECOM
Page87HydroCAD® 10.00-16 s/n 04851 © 2015 HydroCAD Software Solutions LLC
Pond 224P: 224
Inflow
Primary
Hydrograph
Time (hours)
242220181614121086420Flow (
cfs)
6
5
4
3
2
1
0 Inflow Area=3.190
ac Peak Elev=91.
73'Storage=12,150
cf 6.08
cfs 0.00
cfs Pond 224P:
224
Primary Stage-
Discharge Discharge (
cfs)
1301201101009080706050403020100Elevation (
feet)
93
92
91 90 Broad-Crested
Type II 24-hr 2 yr Rainfall=3.66"Site ContractorY10A
Printed 2/12/2018PreparedbyAECOM
Page88HydroCAD® 10.00-16 s/n 04851 © 2015 HydroCAD Software Solutions LLC
Pond 224P: 224
Surface
Storage
Stage-Area-Storage
Storage (cubic-feet)
20,00015,00010,0005,0000
Surface/Horizontal/Wetted Area (sq-ft)
10,0008,0006,0004,0002,0000
Elevation (
feet)
93
92
91 90 Custom
Type II 24-hr 2 yr Rainfall=3.66"Site ContractorY10A
Printed 2/12/2018PreparedbyAECOM
Page89HydroCAD® 10.00-16 s/n 04851 © 2015 HydroCAD Software Solutions LLC
Hydrograph for Pond 224P: 224
Time
hours)
Inflow
cfs)
Storage
cubic-feet)
Elevation
feet)
Primary
cfs)
0.00 0.00 0 90.00 0.00
0.60 0.00 0 90.00 0.00
1.20 0.00 0 90.00 0.00
1.80 0.00 0 90.00 0.00
2.40 0.00 0 90.00 0.00
3.00 0.00 0 90.00 0.00
3.60 0.00 0 90.00 0.00
4.20 0.00 0 90.00 0.00
4.80 0.00 0 90.00 0.00
5.40 0.00 0 90.00 0.00
6.00 0.00 0 90.00 0.00
6.60 0.00 0 90.00 0.00
7.20 0.00 0 90.00 0.00
7.80 0.00 0 90.00 0.00
8.40 0.00 0 90.00 0.00
9.00 0.00 0 90.00 0.00
9.60 0.00 0 90.00 0.00
10.20 0.00 0 90.00 0.00
10.80 0.00 0 90.00 0.00
11.40 0.03 11 90.00 0.00
12.00 5.48 3,346 90.56 0.00
12.60 0.50 5,953 90.95 0.00
13.20 0.35 6,855 91.07 0.00
13.80 0.27 7,513 91.16 0.00
14.40 0.22 8,027 91.23 0.00
15.00 0.20 8,480 91.29 0.00
15.60 0.17 8,882 91.34 0.00
16.20 0.15 9,230 91.38 0.00
16.80 0.14 9,548 91.42 0.00
17.40 0.13 9,848 91.46 0.00
18.00 0.12 10,127 91.49 0.00
18.60 0.12 10,387 91.52 0.00
19.20 0.11 10,626 91.55 0.00
19.80 0.10 10,844 91.58 0.00
20.40 0.09 11,044 91.60 0.00
21.00 0.09 11,237 91.63 0.00
21.60 0.09 11,427 91.65 0.00
22.20 0.09 11,614 91.67 0.00
22.80 0.08 11,797 91.69 0.00
23.40 0.08 11,975 91.71 0.00
24.00 0.08 12,150 91.73 0.00
Type II 24-hr 2 yr Rainfall=3.66"Site ContractorY10A
Printed 2/12/2018PreparedbyAECOM
Page90HydroCAD® 10.00-16 s/n 04851 © 2015 HydroCAD Software Solutions LLC
Stage-Discharge for Pond 224P: 224
Elevation
feet)
Primary
cfs)
90.00 0.00
90.02 0.00
90.04 0.00
90.06 0.00
90.08 0.00
90.10 0.00
90.12 0.00
90.14 0.00
90.16 0.00
90.18 0.00
90.20 0.00
90.22 0.00
90.24 0.00
90.26 0.00
90.28 0.00
90.30 0.00
90.32 0.00
90.34 0.00
90.36 0.00
90.38 0.00
90.40 0.00
90.42 0.00
90.44 0.00
90.46 0.00
90.48 0.00
90.50 0.00
90.52 0.00
90.54 0.00
90.56 0.00
90.58 0.00
90.60 0.00
90.62 0.00
90.64 0.00
90.66 0.00
90.68 0.00
90.70 0.00
90.72 0.00
90.74 0.00
90.76 0.00
90.78 0.00
90.80 0.00
90.82 0.00
90.84 0.00
90.86 0.00
90.88 0.00
90.90 0.00
90.92 0.00
90.94 0.00
90.96 0.00
90.98 0.00
91.00 0.00
91.02 0.00
91.04 0.00
Elevation
feet)
Primary
cfs)
91.06 0.00
91.08 0.00
91.10 0.00
91.12 0.00
91.14 0.00
91.16 0.00
91.18 0.00
91.20 0.00
91.22 0.00
91.24 0.00
91.26 0.00
91.28 0.00
91.30 0.00
91.32 0.00
91.34 0.00
91.36 0.00
91.38 0.00
91.40 0.00
91.42 0.00
91.44 0.00
91.46 0.00
91.48 0.00
91.50 0.00
91.52 0.00
91.54 0.00
91.56 0.00
91.58 0.00
91.60 0.00
91.62 0.00
91.64 0.00
91.66 0.00
91.68 0.00
91.70 0.00
91.72 0.00
91.74 0.00
91.76 0.00
91.78 0.00
91.80 0.00
91.82 0.00
91.84 0.00
91.86 0.00
91.88 0.00
91.90 0.00
91.92 0.00
91.94 0.00
91.96 0.00
91.98 0.00
92.00 0.00
92.02 0.33
92.04 0.94
92.06 1.72
92.08 2.65
92.10 3.70
Elevation
feet)
Primary
cfs)
92.12 4.86
92.14 6.13
92.16 7.49
92.18 8.94
92.20 10.46
92.22 12.16
92.24 13.94
92.26 15.83
92.28 17.81
92.30 19.88
92.32 22.05
92.34 24.31
92.36 26.65
92.38 29.09
92.40 31.62
92.42 34.30
92.44 37.07
92.46 39.93
92.48 42.90
92.50 45.96
92.52 49.12
92.54 52.38
92.56 55.74
92.58 59.19
92.60 62.74
92.62 65.86
92.64 69.02
92.66 72.22
92.68 75.48
92.70 78.77
92.72 82.11
92.74 85.49
92.76 88.91
92.78 92.38
92.80 95.88
92.82 99.50
92.84 103.16
92.86 106.87
92.88 110.62
92.90 114.41
92.92 118.25
92.94 122.12
92.96 126.04
92.98 130.00
93.00 134.00
Type II 24-hr 2 yr Rainfall=3.66"Site ContractorY10A
Printed 2/12/2018PreparedbyAECOM
Page91HydroCAD® 10.00-16 s/n 04851 © 2015 HydroCAD Software Solutions LLC
Stage-Area-Storage for Pond 224P: 224
Elevation
feet)
Surface
sq-ft)
Storage
cubic-feet)
90.00 5,642 0
90.05 5,695 283
90.10 5,749 570
90.15 5,803 858
90.20 5,856 1,150
90.25 5,910 1,444
90.30 5,963 1,741
90.35 6,016 2,040
90.40 6,070 2,342
90.45 6,124 2,647
90.50 6,177 2,955
90.55 6,288 3,266
90.60 6,399 3,584
90.65 6,510 3,906
90.70 6,621 4,235
90.75 6,732 4,568
90.80 6,842 4,908
90.85 6,953 5,253
90.90 7,064 5,603
90.95 7,175 5,959
91.00 7,286 6,321
91.05 7,376 6,687
91.10 7,466 7,058
91.15 7,557 7,434
91.20 7,647 7,814
91.25 7,737 8,198
91.30 7,827 8,587
91.35 7,917 8,981
91.40 8,008 9,379
91.45 8,098 9,782
91.50 8,188 10,189
91.55 8,291 10,601
91.60 8,394 11,018
91.65 8,496 11,440
91.70 8,599 11,868
91.75 8,702 12,300
91.80 8,805 12,738
91.85 8,908 13,181
91.90 9,010 13,629
91.95 9,113 14,082
92.00 9,216 14,540
92.05 9,278 15,002
92.10 9,339 15,468
92.15 9,401 15,936
92.20 9,463 16,408
92.25 9,525 16,883
92.30 9,586 17,360
92.35 9,648 17,841
92.40 9,710 18,325
92.45 9,771 18,812
92.50 9,833 19,302
92.55 9,895 19,795
92.60 9,956 20,292
Elevation
feet)
Surface
sq-ft)
Storage
cubic-feet)
92.65 10,018 20,791
92.70 10,080 21,294
92.75 10,142 21,799
92.80 10,203 22,308
92.85 10,265 22,819
92.90 10,327 23,334
92.95 10,388 23,852
93.00 10,450 24,373
Type II 24-hr 10 yr Rainfall=5.52"Site ContractorY10A
Printed 2/12/2018PreparedbyAECOM
Page92HydroCAD® 10.00-16 s/n 04851 © 2015 HydroCAD Software Solutions LLC
Time span=0.00-24.00 hrs, dt=0.03 hrs, 801 points
Runoff by SCS TR-20 method, UH=SCS, Weighted-CN
Reach routing by Stor-Ind+Trans method - Pond routing by Stor-Ind method
Runoff Area=24.590 ac 0.00% Impervious Runoff Depth>2.86"Subcatchment 121S: Pre Dev't
Flow Length=1,245' Tc=27.6 min CN=75 Runoff=64.47 cfs 5.853 af
Runoff Area=5.330 ac 0.00% Impervious Runoff Depth>2.69"Subcatchment 122S: Pre Dev't
Tc=10.0 min CN=73 Runoff=22.06 cfs 1.194 af
Runoff Area=3.710 ac 0.00% Impervious Runoff Depth>2.67"Subcatchment 123S: Pre Dev't
Tc=30.0 min CN=73 Runoff=8.61 cfs 0.826 af
Runoff Area=3.190 ac 0.00% Impervious Runoff Depth>2.69"Subcatchment 124S: Pre Dev't
Tc=10.0 min CN=73 Runoff=13.21 cfs 0.715 af
Runoff Area=24.590 ac 0.00% Impervious Runoff Depth>4.05"Subcatchment 221S: Post CY (s)
Flow Length=979' Tc=14.1 min CN=87 Runoff=128.95 cfs 8.294 af
Runoff Area=5.330 ac 0.00% Impervious Runoff Depth>3.85"Subcatchment 222S: Post CY (nw)
Tc=5.0 min CN=85 Runoff=36.13 cfs 1.709 af
Runoff Area=3.710 ac 0.00% Impervious Runoff Depth>4.27"Subcatchment 223S: Post CY (ne)
Tc=5.0 min CN=89 Runoff=27.08 cfs 1.319 af
Runoff Area=3.190 ac 0.00% Impervious Runoff Depth>2.34"Subcatchment 224S: Post CY (se)
Tc=5.0 min CN=69 Runoff=13.82 cfs 0.622 af
Peak Elev=94.11' Storage=171,159 cf Inflow=128.95 cfs 8.294afPond221P: 221
Outflow=63.57 cfs 5.152 af
Peak Elev=92.29' Storage=35,032 cf Inflow=36.13 cfs 1.709afPond222P: SF
Outflow=18.63 cfs 1.078 af
Peak Elev=94.15' Storage=32,427 cf Inflow=27.08 cfs 1.319afPond223P: 223
Outflow=6.78 cfs 0.617 af
Peak Elev=92.04' Storage=14,910 cf Inflow=13.82 cfs 0.622afPond224P: 224
Outflow=0.94 cfs 0.286 af
Total Runoff Area = 73.640 ac Runoff Volume = 20.533 af Average Runoff Depth = 3.35"
100.00% Pervious = 73.640 ac 0.00% Impervious = 0.000 ac
Type II 24-hr 10 yr Rainfall=5.52"Site ContractorY10A
Printed 2/12/2018PreparedbyAECOM
Page93HydroCAD® 10.00-16 s/n 04851 © 2015 HydroCAD Software Solutions LLC
Summary for Subcatchment 121S: Pre Dev't
Runoff = 64.47 cfs @ 12.22 hrs, Volume= 5.853 af, Depth> 2.86"
Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-24.00 hrs, dt= 0.03 hrs
Type II 24-hr 10 yr Rainfall=5.52"
Area (ac) CN Description
24.590 75
24.590 100.00% Pervious Area
Tc Length Slope Velocity Capacity Description
min) (feet) (ft/ft) (ft/sec) (cfs)
6.7 165 0.0212 0.41 Sheet Flow,
Cultivated: Residue<=20% n= 0.060 P2= 3.36"
1.8 106 0.0038 0.99 Shallow Concentrated Flow,
Unpaved Kv= 16.1 fps
0.4 150 0.0220 5.84 70.07 Channel Flow,
Area= 12.0 sf Perim= 11.0' r= 1.09' n= 0.040
0.1 24 0.0083 3.73 26.33 Pipe Channel,
36.0" Round Area= 7.1 sf Perim= 9.4' r= 0.75'
n= 0.030 Corrugated metal
9.9 384 0.0016 0.64 Shallow Concentrated Flow,
Unpaved Kv= 16.1 fps
0.9 32 0.0063 0.62 0.03 Pipe Channel,
3.0" Round Area= 0.0 sf Perim= 0.8' r= 0.06'
n= 0.030 Corrugated metal
7.8 384 0.0026 0.82 Shallow Concentrated Flow,
Unpaved Kv= 16.1 fps
27.6 1,245 Total
Type II 24-hr 10 yr Rainfall=5.52"Site ContractorY10A
Printed 2/12/2018PreparedbyAECOM
Page94HydroCAD® 10.00-16 s/n 04851 © 2015 HydroCAD Software Solutions LLC
Subcatchment 121S: Pre Dev't
Runoff
Hydrograph
Time (hours)
242220181614121086420Flow (
cfs)
70
60
50
40
30
20
10
0 Type II 24-
hr 10 yr Rainfall=5.
52"Runoff Area=24.590
ac Runoff Volume=5.853
af Runoff Depth>2.
86"Flow Length=1,
245'Tc=27.6
min CN=
75 64.47
Type II 24-hr 10 yr Rainfall=5.52"Site ContractorY10A
Printed 2/12/2018PreparedbyAECOM
Page95HydroCAD® 10.00-16 s/n 04851 © 2015 HydroCAD Software Solutions LLC
Hydrograph for Subcatchment 121S: Pre Dev't
Time
hours)
Precip.
inches)
Excess
inches)
Runoff
cfs)
0.00 0.00 0.00 0.00
0.30 0.02 0.00 0.00
0.60 0.03 0.00 0.00
0.90 0.05 0.00 0.00
1.20 0.07 0.00 0.00
1.50 0.09 0.00 0.00
1.80 0.11 0.00 0.00
2.10 0.13 0.00 0.00
2.40 0.15 0.00 0.00
2.70 0.17 0.00 0.00
3.00 0.19 0.00 0.00
3.30 0.21 0.00 0.00
3.60 0.23 0.00 0.00
3.90 0.26 0.00 0.00
4.20 0.28 0.00 0.00
4.50 0.30 0.00 0.00
4.80 0.33 0.00 0.00
5.10 0.36 0.00 0.00
5.40 0.38 0.00 0.00
5.70 0.41 0.00 0.00
6.00 0.44 0.00 0.00
6.30 0.47 0.00 0.00
6.60 0.50 0.00 0.00
6.90 0.54 0.00 0.00
7.20 0.57 0.00 0.00
7.50 0.60 0.00 0.00
7.80 0.64 0.00 0.00
8.10 0.67 0.00 0.00
8.40 0.72 0.00 0.01
8.70 0.76 0.00 0.07
9.00 0.81 0.01 0.17
9.30 0.86 0.01 0.30
9.60 0.92 0.02 0.42
9.90 0.98 0.03 0.56
10.20 1.05 0.04 0.77
10.50 1.13 0.06 1.06
10.80 1.22 0.08 1.46
11.10 1.34 0.11 2.06
11.40 1.50 0.17 3.01
11.70 1.96 0.36 5.22
12.00 3.66 1.42 31.04
12.30 3.94 1.62 59.40
12.60 4.10 1.74 24.85
12.90 4.23 1.84 12.44
13.20 4.33 1.91 8.27
13.50 4.41 1.98 6.39
13.80 4.48 2.04 5.41
14.10 4.55 2.09 4.68
14.40 4.61 2.13 4.12
14.70 4.66 2.18 3.81
15.00 4.71 2.22 3.58
15.30 4.76 2.26 3.36
15.60 4.80 2.29 3.14
Time
hours)
Precip.
inches)
Excess
inches)
Runoff
cfs)
15.90 4.84 2.32 2.92
16.20 4.88 2.35 2.70
16.50 4.92 2.38 2.54
16.80 4.95 2.41 2.44
17.10 4.99 2.44 2.36
17.40 5.02 2.47 2.28
17.70 5.05 2.49 2.20
18.00 5.08 2.52 2.12
18.30 5.11 2.54 2.04
18.60 5.14 2.56 1.96
18.90 5.17 2.59 1.88
19.20 5.19 2.61 1.80
19.50 5.22 2.63 1.72
19.80 5.24 2.65 1.64
20.10 5.26 2.66 1.55
20.40 5.28 2.68 1.49
20.70 5.30 2.70 1.45
21.00 5.33 2.72 1.44
21.30 5.35 2.73 1.42
21.60 5.37 2.75 1.40
21.90 5.39 2.77 1.39
22.20 5.41 2.78 1.37
22.50 5.43 2.80 1.36
22.80 5.45 2.81 1.34
23.10 5.46 2.83 1.33
23.40 5.48 2.85 1.31
23.70 5.50 2.86 1.30
24.00 5.52 2.88 1.28
Type II 24-hr 10 yr Rainfall=5.52"Site ContractorY10A
Printed 2/12/2018PreparedbyAECOM
Page96HydroCAD® 10.00-16 s/n 04851 © 2015 HydroCAD Software Solutions LLC
Summary for Subcatchment 122S: Pre Dev't
Runoff = 22.06 cfs @ 12.02 hrs, Volume= 1.194 af, Depth> 2.69"
Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-24.00 hrs, dt= 0.03 hrs
Type II 24-hr 10 yr Rainfall=5.52"
Area (ac) CN Description
5.330 73
5.330 100.00% Pervious Area
Tc Length Slope Velocity Capacity Description
min) (feet) (ft/ft) (ft/sec) (cfs)
10.0 Direct Entry, Direct
Subcatchment 122S: Pre Dev't
Runoff
Hydrograph
Time (hours)
242220181614121086420Flow (
cfs)
24
22
20
18
16
14
12
10
8
6
4
2
0 Type II 24-
hr 10 yr Rainfall=5.
52"Runoff Area=5.330
ac Runoff Volume=1.194
af Runoff Depth>2.
69"Tc=10.0
min CN=
73 22.06
Type II 24-hr 10 yr Rainfall=5.52"Site ContractorY10A
Printed 2/12/2018PreparedbyAECOM
Page97HydroCAD® 10.00-16 s/n 04851 © 2015 HydroCAD Software Solutions LLC
Hydrograph for Subcatchment 122S: Pre Dev't
Time
hours)
Precip.
inches)
Excess
inches)
Runoff
cfs)
0.00 0.00 0.00 0.00
0.30 0.02 0.00 0.00
0.60 0.03 0.00 0.00
0.90 0.05 0.00 0.00
1.20 0.07 0.00 0.00
1.50 0.09 0.00 0.00
1.80 0.11 0.00 0.00
2.10 0.13 0.00 0.00
2.40 0.15 0.00 0.00
2.70 0.17 0.00 0.00
3.00 0.19 0.00 0.00
3.30 0.21 0.00 0.00
3.60 0.23 0.00 0.00
3.90 0.26 0.00 0.00
4.20 0.28 0.00 0.00
4.50 0.30 0.00 0.00
4.80 0.33 0.00 0.00
5.10 0.36 0.00 0.00
5.40 0.38 0.00 0.00
5.70 0.41 0.00 0.00
6.00 0.44 0.00 0.00
6.30 0.47 0.00 0.00
6.60 0.50 0.00 0.00
6.90 0.54 0.00 0.00
7.20 0.57 0.00 0.00
7.50 0.60 0.00 0.00
7.80 0.64 0.00 0.00
8.10 0.67 0.00 0.00
8.40 0.72 0.00 0.00
8.70 0.76 0.00 0.00
9.00 0.81 0.00 0.02
9.30 0.86 0.00 0.05
9.60 0.92 0.01 0.07
9.90 0.98 0.01 0.11
10.20 1.05 0.02 0.16
10.50 1.13 0.04 0.23
10.80 1.22 0.06 0.34
11.10 1.34 0.08 0.49
11.40 1.50 0.13 0.81
11.70 1.96 0.30 2.78
12.00 3.66 1.29 21.62
12.30 3.94 1.48 4.11
12.60 4.10 1.60 2.14
12.90 4.23 1.69 1.61
13.20 4.33 1.77 1.32
13.50 4.41 1.83 1.13
13.80 4.48 1.88 0.98
14.10 4.55 1.93 0.85
14.40 4.61 1.98 0.79
14.70 4.66 2.02 0.75
15.00 4.71 2.06 0.71
15.30 4.76 2.09 0.66
15.60 4.80 2.13 0.62
Time
hours)
Precip.
inches)
Excess
inches)
Runoff
cfs)
15.90 4.84 2.16 0.57
16.20 4.88 2.19 0.53
16.50 4.92 2.22 0.51
16.80 4.95 2.25 0.50
17.10 4.99 2.27 0.48
17.40 5.02 2.30 0.46
17.70 5.05 2.32 0.45
18.00 5.08 2.35 0.43
18.30 5.11 2.37 0.41
18.60 5.14 2.39 0.40
18.90 5.17 2.41 0.38
19.20 5.19 2.43 0.36
19.50 5.22 2.45 0.35
19.80 5.24 2.47 0.33
20.10 5.26 2.49 0.31
20.40 5.28 2.50 0.30
20.70 5.30 2.52 0.30
21.00 5.33 2.54 0.30
21.30 5.35 2.55 0.30
21.60 5.37 2.57 0.29
21.90 5.39 2.59 0.29
22.20 5.41 2.60 0.29
22.50 5.43 2.62 0.28
22.80 5.45 2.63 0.28
23.10 5.46 2.65 0.28
23.40 5.48 2.67 0.27
23.70 5.50 2.68 0.27
24.00 5.52 2.70 0.27
Type II 24-hr 10 yr Rainfall=5.52"Site ContractorY10A
Printed 2/12/2018PreparedbyAECOM
Page98HydroCAD® 10.00-16 s/n 04851 © 2015 HydroCAD Software Solutions LLC
Summary for Subcatchment 123S: Pre Dev't
Runoff = 8.61 cfs @ 12.25 hrs, Volume= 0.826 af, Depth> 2.67"
Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-24.00 hrs, dt= 0.03 hrs
Type II 24-hr 10 yr Rainfall=5.52"
Area (ac) CN Description
3.710 73
3.710 100.00% Pervious Area
Tc Length Slope Velocity Capacity Description
min) (feet) (ft/ft) (ft/sec) (cfs)
30.0 Direct Entry,
Subcatchment 123S: Pre Dev't
Runoff
Hydrograph
Time (hours)
242220181614121086420Flow (
cfs)
9
8
7
6
5
4
3
2
1
0 Type II 24-
hr 10 yr Rainfall=5.
52"Runoff Area=3.710
ac Runoff Volume=0.826
af Runoff Depth>2.
67"Tc=30.0
min CN=
73 8.61
Type II 24-hr 10 yr Rainfall=5.52"Site ContractorY10A
Printed 2/12/2018PreparedbyAECOM
Page99HydroCAD® 10.00-16 s/n 04851 © 2015 HydroCAD Software Solutions LLC
Hydrograph for Subcatchment 123S: Pre Dev't
Time
hours)
Precip.
inches)
Excess
inches)
Runoff
cfs)
0.00 0.00 0.00 0.00
0.30 0.02 0.00 0.00
0.60 0.03 0.00 0.00
0.90 0.05 0.00 0.00
1.20 0.07 0.00 0.00
1.50 0.09 0.00 0.00
1.80 0.11 0.00 0.00
2.10 0.13 0.00 0.00
2.40 0.15 0.00 0.00
2.70 0.17 0.00 0.00
3.00 0.19 0.00 0.00
3.30 0.21 0.00 0.00
3.60 0.23 0.00 0.00
3.90 0.26 0.00 0.00
4.20 0.28 0.00 0.00
4.50 0.30 0.00 0.00
4.80 0.33 0.00 0.00
5.10 0.36 0.00 0.00
5.40 0.38 0.00 0.00
5.70 0.41 0.00 0.00
6.00 0.44 0.00 0.00
6.30 0.47 0.00 0.00
6.60 0.50 0.00 0.00
6.90 0.54 0.00 0.00
7.20 0.57 0.00 0.00
7.50 0.60 0.00 0.00
7.80 0.64 0.00 0.00
8.10 0.67 0.00 0.00
8.40 0.72 0.00 0.00
8.70 0.76 0.00 0.00
9.00 0.81 0.00 0.00
9.30 0.86 0.00 0.02
9.60 0.92 0.01 0.03
9.90 0.98 0.01 0.05
10.20 1.05 0.02 0.08
10.50 1.13 0.04 0.11
10.80 1.22 0.06 0.17
11.10 1.34 0.08 0.24
11.40 1.50 0.13 0.36
11.70 1.96 0.30 0.63
12.00 3.66 1.29 3.65
12.30 3.94 1.48 8.36
12.60 4.10 1.60 3.92
12.90 4.23 1.69 1.97
13.20 4.33 1.77 1.27
13.50 4.41 1.83 0.97
13.80 4.48 1.88 0.80
14.10 4.55 1.93 0.69
14.40 4.61 1.98 0.61
14.70 4.66 2.02 0.56
15.00 4.71 2.06 0.52
15.30 4.76 2.09 0.49
15.60 4.80 2.13 0.46
Time
hours)
Precip.
inches)
Excess
inches)
Runoff
cfs)
15.90 4.84 2.16 0.43
16.20 4.88 2.19 0.40
16.50 4.92 2.22 0.37
16.80 4.95 2.25 0.36
17.10 4.99 2.27 0.35
17.40 5.02 2.30 0.33
17.70 5.05 2.32 0.32
18.00 5.08 2.35 0.31
18.30 5.11 2.37 0.30
18.60 5.14 2.39 0.29
18.90 5.17 2.41 0.28
19.20 5.19 2.43 0.26
19.50 5.22 2.45 0.25
19.80 5.24 2.47 0.24
20.10 5.26 2.49 0.23
20.40 5.28 2.50 0.22
20.70 5.30 2.52 0.21
21.00 5.33 2.54 0.21
21.30 5.35 2.55 0.21
21.60 5.37 2.57 0.21
21.90 5.39 2.59 0.20
22.20 5.41 2.60 0.20
22.50 5.43 2.62 0.20
22.80 5.45 2.63 0.20
23.10 5.46 2.65 0.19
23.40 5.48 2.67 0.19
23.70 5.50 2.68 0.19
24.00 5.52 2.70 0.19
Type II 24-hr 10 yr Rainfall=5.52"Site ContractorY10A
Printed 2/12/2018PreparedbyAECOM
Page100HydroCAD® 10.00-16 s/n 04851 © 2015 HydroCAD Software Solutions LLC
Summary for Subcatchment 124S: Pre Dev't
Runoff = 13.21 cfs @ 12.02 hrs, Volume= 0.715 af, Depth> 2.69"
Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-24.00 hrs, dt= 0.03 hrs
Type II 24-hr 10 yr Rainfall=5.52"
Area (ac) CN Description
3.190 73
3.190 100.00% Pervious Area
Tc Length Slope Velocity Capacity Description
min) (feet) (ft/ft) (ft/sec) (cfs)
10.0 Direct Entry,
Subcatchment 124S: Pre Dev't
Runoff
Hydrograph
Time (hours)
242220181614121086420Flow (
cfs)
14
12
10
8
6
4
2
0 Type II 24-
hr 10 yr Rainfall=5.
52"Runoff Area=3.190
ac Runoff Volume=0.715
af Runoff Depth>2.
69"Tc=10.0
min CN=
73 13.21
Type II 24-hr 10 yr Rainfall=5.52"Site ContractorY10A
Printed 2/12/2018PreparedbyAECOM
Page101HydroCAD® 10.00-16 s/n 04851 © 2015 HydroCAD Software Solutions LLC
Hydrograph for Subcatchment 124S: Pre Dev't
Time
hours)
Precip.
inches)
Excess
inches)
Runoff
cfs)
0.00 0.00 0.00 0.00
0.30 0.02 0.00 0.00
0.60 0.03 0.00 0.00
0.90 0.05 0.00 0.00
1.20 0.07 0.00 0.00
1.50 0.09 0.00 0.00
1.80 0.11 0.00 0.00
2.10 0.13 0.00 0.00
2.40 0.15 0.00 0.00
2.70 0.17 0.00 0.00
3.00 0.19 0.00 0.00
3.30 0.21 0.00 0.00
3.60 0.23 0.00 0.00
3.90 0.26 0.00 0.00
4.20 0.28 0.00 0.00
4.50 0.30 0.00 0.00
4.80 0.33 0.00 0.00
5.10 0.36 0.00 0.00
5.40 0.38 0.00 0.00
5.70 0.41 0.00 0.00
6.00 0.44 0.00 0.00
6.30 0.47 0.00 0.00
6.60 0.50 0.00 0.00
6.90 0.54 0.00 0.00
7.20 0.57 0.00 0.00
7.50 0.60 0.00 0.00
7.80 0.64 0.00 0.00
8.10 0.67 0.00 0.00
8.40 0.72 0.00 0.00
8.70 0.76 0.00 0.00
9.00 0.81 0.00 0.01
9.30 0.86 0.00 0.03
9.60 0.92 0.01 0.04
9.90 0.98 0.01 0.07
10.20 1.05 0.02 0.10
10.50 1.13 0.04 0.14
10.80 1.22 0.06 0.20
11.10 1.34 0.08 0.30
11.40 1.50 0.13 0.48
11.70 1.96 0.30 1.66
12.00 3.66 1.29 12.94
12.30 3.94 1.48 2.46
12.60 4.10 1.60 1.28
12.90 4.23 1.69 0.96
13.20 4.33 1.77 0.79
13.50 4.41 1.83 0.68
13.80 4.48 1.88 0.59
14.10 4.55 1.93 0.51
14.40 4.61 1.98 0.48
14.70 4.66 2.02 0.45
15.00 4.71 2.06 0.42
15.30 4.76 2.09 0.40
15.60 4.80 2.13 0.37
Time
hours)
Precip.
inches)
Excess
inches)
Runoff
cfs)
15.90 4.84 2.16 0.34
16.20 4.88 2.19 0.32
16.50 4.92 2.22 0.31
16.80 4.95 2.25 0.30
17.10 4.99 2.27 0.29
17.40 5.02 2.30 0.28
17.70 5.05 2.32 0.27
18.00 5.08 2.35 0.26
18.30 5.11 2.37 0.25
18.60 5.14 2.39 0.24
18.90 5.17 2.41 0.23
19.20 5.19 2.43 0.22
19.50 5.22 2.45 0.21
19.80 5.24 2.47 0.20
20.10 5.26 2.49 0.19
20.40 5.28 2.50 0.18
20.70 5.30 2.52 0.18
21.00 5.33 2.54 0.18
21.30 5.35 2.55 0.18
21.60 5.37 2.57 0.17
21.90 5.39 2.59 0.17
22.20 5.41 2.60 0.17
22.50 5.43 2.62 0.17
22.80 5.45 2.63 0.17
23.10 5.46 2.65 0.17
23.40 5.48 2.67 0.16
23.70 5.50 2.68 0.16
24.00 5.52 2.70 0.16
Type II 24-hr 10 yr Rainfall=5.52"Site ContractorY10A
Printed 2/12/2018PreparedbyAECOM
Page102HydroCAD® 10.00-16 s/n 04851 © 2015 HydroCAD Software Solutions LLC
Summary for Subcatchment 221S: Post CY (s)
Runoff = 128.95 cfs @ 12.06 hrs, Volume= 8.294 af, Depth> 4.05"
Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-24.00 hrs, dt= 0.03 hrs
Type II 24-hr 10 yr Rainfall=5.52"
Area (ac) CN Description
24.590 87
24.590 100.00% Pervious Area
Tc Length Slope Velocity Capacity Description
min) (feet) (ft/ft) (ft/sec) (cfs)
1.7 165 0.0212 1.59 Sheet Flow,
Smooth surfaces n= 0.011 P2= 3.36"
1.4 106 0.0038 1.25 Shallow Concentrated Flow,
Paved Kv= 20.3 fps
0.4 150 0.0220 6.67 80.08 Channel Flow,
Area= 12.0 sf Perim= 11.0' r= 1.09' n= 0.035
0.6 24 0.0083 0.71 0.03 Pipe Channel,
3.0" Round Area= 0.0 sf Perim= 0.8' r= 0.06'
n= 0.030 Corrugated metal
7.9 384 0.0016 0.81 Shallow Concentrated Flow,
Paved Kv= 20.3 fps
0.9 32 0.0063 0.62 0.03 Pipe Channel,
3.0" Round Area= 0.0 sf Perim= 0.8' r= 0.06'
n= 0.030
1.2 118 0.0110 1.69 Shallow Concentrated Flow,
Unpaved Kv= 16.1 fps
14.1 979 Total
Type II 24-hr 10 yr Rainfall=5.52"Site ContractorY10A
Printed 2/12/2018PreparedbyAECOM
Page103HydroCAD® 10.00-16 s/n 04851 © 2015 HydroCAD Software Solutions LLC
Subcatchment 221S: Post CY (s)
Runoff
Hydrograph
Time (hours)
242220181614121086420Flow (
cfs)
140
120
100
80
60
40
20
0 Type II 24-
hr 10 yr Rainfall=5.
52"Runoff Area=24.590
ac Runoff Volume=8.294
af Runoff Depth>4.
05"Flow Length=
979'Tc=14.1
min CN=
87 128.95
Type II 24-hr 10 yr Rainfall=5.52"Site ContractorY10A
Printed 2/12/2018PreparedbyAECOM
Page104HydroCAD® 10.00-16 s/n 04851 © 2015 HydroCAD Software Solutions LLC
Hydrograph for Subcatchment 221S: Post CY (s)
Time
hours)
Precip.
inches)
Excess
inches)
Runoff
cfs)
0.00 0.00 0.00 0.00
0.30 0.02 0.00 0.00
0.60 0.03 0.00 0.00
0.90 0.05 0.00 0.00
1.20 0.07 0.00 0.00
1.50 0.09 0.00 0.00
1.80 0.11 0.00 0.00
2.10 0.13 0.00 0.00
2.40 0.15 0.00 0.00
2.70 0.17 0.00 0.00
3.00 0.19 0.00 0.00
3.30 0.21 0.00 0.00
3.60 0.23 0.00 0.00
3.90 0.26 0.00 0.00
4.20 0.28 0.00 0.00
4.50 0.30 0.00 0.00
4.80 0.33 0.00 0.04
5.10 0.36 0.00 0.11
5.40 0.38 0.00 0.18
5.70 0.41 0.01 0.26
6.00 0.44 0.01 0.35
6.30 0.47 0.02 0.44
6.60 0.50 0.02 0.53
6.90 0.54 0.03 0.62
7.20 0.57 0.04 0.72
7.50 0.60 0.05 0.82
7.80 0.64 0.06 0.92
8.10 0.67 0.08 1.02
8.40 0.72 0.09 1.21
8.70 0.76 0.11 1.46
9.00 0.81 0.13 1.73
9.30 0.86 0.16 1.98
9.60 0.92 0.18 2.11
9.90 0.98 0.21 2.43
10.20 1.05 0.25 2.93
10.50 1.13 0.29 3.61
10.80 1.22 0.35 4.52
11.10 1.34 0.43 5.79
11.40 1.50 0.53 8.17
11.70 1.96 0.87 18.23
12.00 3.66 2.33 114.94
12.30 3.94 2.58 37.85
12.60 4.10 2.73 14.93
12.90 4.23 2.85 9.90
13.20 4.33 2.94 7.93
13.50 4.41 3.02 6.74
13.80 4.48 3.08 5.79
14.10 4.55 3.14 5.02
14.40 4.61 3.20 4.57
14.70 4.66 3.25 4.30
15.00 4.71 3.30 4.04
15.30 4.76 3.34 3.77
15.60 4.80 3.38 3.51
Time
hours)
Precip.
inches)
Excess
inches)
Runoff
cfs)
15.90 4.84 3.42 3.24
16.20 4.88 3.46 2.99
16.50 4.92 3.49 2.87
16.80 4.95 3.52 2.77
17.10 4.99 3.56 2.68
17.40 5.02 3.59 2.58
17.70 5.05 3.62 2.49
18.00 5.08 3.65 2.39
18.30 5.11 3.67 2.30
18.60 5.14 3.70 2.20
18.90 5.17 3.73 2.11
19.20 5.19 3.75 2.01
19.50 5.22 3.77 1.91
19.80 5.24 3.79 1.82
20.10 5.26 3.81 1.72
20.40 5.28 3.84 1.67
20.70 5.30 3.85 1.65
21.00 5.33 3.87 1.63
21.30 5.35 3.89 1.62
21.60 5.37 3.91 1.60
21.90 5.39 3.93 1.58
22.20 5.41 3.95 1.56
22.50 5.43 3.97 1.54
22.80 5.45 3.99 1.52
23.10 5.46 4.01 1.50
23.40 5.48 4.02 1.48
23.70 5.50 4.04 1.46
24.00 5.52 4.06 1.44
Type II 24-hr 10 yr Rainfall=5.52"Site ContractorY10A
Printed 2/12/2018PreparedbyAECOM
Page105HydroCAD® 10.00-16 s/n 04851 © 2015 HydroCAD Software Solutions LLC
Summary for Subcatchment 222S: Post CY (nw)
Runoff = 36.13 cfs @ 11.96 hrs, Volume= 1.709 af, Depth> 3.85"
Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-24.00 hrs, dt= 0.03 hrs
Type II 24-hr 10 yr Rainfall=5.52"
Area (ac) CN Description
5.330 85
5.330 100.00% Pervious Area
Tc Length Slope Velocity Capacity Description
min) (feet) (ft/ft) (ft/sec) (cfs)
5.0 Direct Entry,
Subcatchment 222S: Post CY (nw)
Runoff
Hydrograph
Time (hours)
242220181614121086420Flow (
cfs)
40
35
30
25
20
15
10
5
0 Type II 24-
hr 10 yr Rainfall=5.
52"Runoff Area=5.330
ac Runoff Volume=1.709
af Runoff Depth>3.
85"Tc=5.0
min CN=
85 36.13
Type II 24-hr 10 yr Rainfall=5.52"Site ContractorY10A
Printed 2/12/2018PreparedbyAECOM
Page106HydroCAD® 10.00-16 s/n 04851 © 2015 HydroCAD Software Solutions LLC
Hydrograph for Subcatchment 222S: Post CY (nw)
Time
hours)
Precip.
inches)
Excess
inches)
Runoff
cfs)
0.00 0.00 0.00 0.00
0.30 0.02 0.00 0.00
0.60 0.03 0.00 0.00
0.90 0.05 0.00 0.00
1.20 0.07 0.00 0.00
1.50 0.09 0.00 0.00
1.80 0.11 0.00 0.00
2.10 0.13 0.00 0.00
2.40 0.15 0.00 0.00
2.70 0.17 0.00 0.00
3.00 0.19 0.00 0.00
3.30 0.21 0.00 0.00
3.60 0.23 0.00 0.00
3.90 0.26 0.00 0.00
4.20 0.28 0.00 0.00
4.50 0.30 0.00 0.00
4.80 0.33 0.00 0.00
5.10 0.36 0.00 0.00
5.40 0.38 0.00 0.01
5.70 0.41 0.00 0.03
6.00 0.44 0.00 0.05
6.30 0.47 0.01 0.06
6.60 0.50 0.01 0.08
6.90 0.54 0.02 0.10
7.20 0.57 0.02 0.12
7.50 0.60 0.03 0.14
7.80 0.64 0.04 0.16
8.10 0.67 0.05 0.18
8.40 0.72 0.06 0.23
8.70 0.76 0.08 0.28
9.00 0.81 0.09 0.34
9.30 0.86 0.11 0.37
9.60 0.92 0.14 0.40
9.90 0.98 0.16 0.49
10.20 1.05 0.20 0.61
10.50 1.13 0.24 0.76
10.80 1.22 0.29 0.98
11.10 1.34 0.35 1.28
11.40 1.50 0.45 1.90
11.70 1.96 0.76 8.43
12.00 3.66 2.16 30.52
12.30 3.94 2.40 3.96
12.60 4.10 2.55 2.32
12.90 4.23 2.66 1.88
13.20 4.33 2.75 1.54
13.50 4.41 2.83 1.32
13.80 4.48 2.89 1.15
14.10 4.55 2.95 1.00
14.40 4.61 3.00 0.94
14.70 4.66 3.06 0.89
15.00 4.71 3.10 0.83
15.30 4.76 3.15 0.77
15.60 4.80 3.19 0.72
Time
hours)
Precip.
inches)
Excess
inches)
Runoff
cfs)
15.90 4.84 3.22 0.66
16.20 4.88 3.26 0.62
16.50 4.92 3.29 0.60
16.80 4.95 3.33 0.58
17.10 4.99 3.36 0.56
17.40 5.02 3.39 0.54
17.70 5.05 3.42 0.52
18.00 5.08 3.45 0.50
18.30 5.11 3.47 0.48
18.60 5.14 3.50 0.46
18.90 5.17 3.52 0.44
19.20 5.19 3.55 0.42
19.50 5.22 3.57 0.40
19.80 5.24 3.59 0.38
20.10 5.26 3.61 0.36
20.40 5.28 3.63 0.35
20.70 5.30 3.65 0.35
21.00 5.33 3.67 0.35
21.30 5.35 3.69 0.34
21.60 5.37 3.71 0.34
21.90 5.39 3.73 0.33
22.20 5.41 3.75 0.33
22.50 5.43 3.76 0.33
22.80 5.45 3.78 0.32
23.10 5.46 3.80 0.32
23.40 5.48 3.82 0.31
23.70 5.50 3.83 0.31
24.00 5.52 3.85 0.31
Type II 24-hr 10 yr Rainfall=5.52"Site ContractorY10A
Printed 2/12/2018PreparedbyAECOM
Page107HydroCAD® 10.00-16 s/n 04851 © 2015 HydroCAD Software Solutions LLC
Summary for Subcatchment 223S: Post CY (ne)
Runoff = 27.08 cfs @ 11.96 hrs, Volume= 1.319 af, Depth> 4.27"
Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-24.00 hrs, dt= 0.03 hrs
Type II 24-hr 10 yr Rainfall=5.52"
Area (ac) CN Description
3.710 89
3.710 100.00% Pervious Area
Tc Length Slope Velocity Capacity Description
min) (feet) (ft/ft) (ft/sec) (cfs)
5.0 Direct Entry,
Subcatchment 223S: Post CY (ne)
Runoff
Hydrograph
Time (hours)
242220181614121086420Flow (
cfs)
30
25
20
15
10
5
0 Type II 24-
hr 10 yr Rainfall=5.
52"Runoff Area=3.710
ac Runoff Volume=1.319
af Runoff Depth>4.
27"Tc=5.0
min CN=
89 27.08
Type II 24-hr 10 yr Rainfall=5.52"Site ContractorY10A
Printed 2/12/2018PreparedbyAECOM
Page108HydroCAD® 10.00-16 s/n 04851 © 2015 HydroCAD Software Solutions LLC
Hydrograph for Subcatchment 223S: Post CY (ne)
Time
hours)
Precip.
inches)
Excess
inches)
Runoff
cfs)
0.00 0.00 0.00 0.00
0.30 0.02 0.00 0.00
0.60 0.03 0.00 0.00
0.90 0.05 0.00 0.00
1.20 0.07 0.00 0.00
1.50 0.09 0.00 0.00
1.80 0.11 0.00 0.00
2.10 0.13 0.00 0.00
2.40 0.15 0.00 0.00
2.70 0.17 0.00 0.00
3.00 0.19 0.00 0.00
3.30 0.21 0.00 0.00
3.60 0.23 0.00 0.00
3.90 0.26 0.00 0.00
4.20 0.28 0.00 0.01
4.50 0.30 0.00 0.02
4.80 0.33 0.01 0.04
5.10 0.36 0.01 0.05
5.40 0.38 0.01 0.06
5.70 0.41 0.02 0.08
6.00 0.44 0.03 0.09
6.30 0.47 0.03 0.11
6.60 0.50 0.04 0.12
6.90 0.54 0.05 0.14
7.20 0.57 0.07 0.15
7.50 0.60 0.08 0.17
7.80 0.64 0.09 0.18
8.10 0.67 0.11 0.20
8.40 0.72 0.13 0.24
8.70 0.76 0.15 0.29
9.00 0.81 0.18 0.34
9.30 0.86 0.21 0.36
9.60 0.92 0.24 0.38
9.90 0.98 0.27 0.46
10.20 1.05 0.31 0.55
10.50 1.13 0.37 0.67
10.80 1.22 0.43 0.86
11.10 1.34 0.51 1.09
11.40 1.50 0.63 1.58
11.70 1.96 0.99 6.78
12.00 3.66 2.51 22.70
12.30 3.94 2.76 2.90
12.60 4.10 2.92 1.69
12.90 4.23 3.04 1.37
13.20 4.33 3.13 1.12
13.50 4.41 3.21 0.96
13.80 4.48 3.28 0.83
14.10 4.55 3.34 0.72
14.40 4.61 3.39 0.68
14.70 4.66 3.45 0.64
15.00 4.71 3.50 0.60
15.30 4.76 3.54 0.56
15.60 4.80 3.58 0.52
Time
hours)
Precip.
inches)
Excess
inches)
Runoff
cfs)
15.90 4.84 3.62 0.48
16.20 4.88 3.66 0.45
16.50 4.92 3.69 0.43
16.80 4.95 3.73 0.42
17.10 4.99 3.76 0.40
17.40 5.02 3.79 0.39
17.70 5.05 3.82 0.37
18.00 5.08 3.85 0.36
18.30 5.11 3.88 0.35
18.60 5.14 3.91 0.33
18.90 5.17 3.93 0.32
19.20 5.19 3.96 0.30
19.50 5.22 3.98 0.29
19.80 5.24 4.00 0.27
20.10 5.26 4.02 0.26
20.40 5.28 4.04 0.25
20.70 5.30 4.06 0.25
21.00 5.33 4.08 0.25
21.30 5.35 4.10 0.25
21.60 5.37 4.12 0.24
21.90 5.39 4.14 0.24
22.20 5.41 4.16 0.24
22.50 5.43 4.18 0.23
22.80 5.45 4.20 0.23
23.10 5.46 4.22 0.23
23.40 5.48 4.24 0.23
23.70 5.50 4.25 0.22
24.00 5.52 4.27 0.22
Type II 24-hr 10 yr Rainfall=5.52"Site ContractorY10A
Printed 2/12/2018PreparedbyAECOM
Page109HydroCAD® 10.00-16 s/n 04851 © 2015 HydroCAD Software Solutions LLC
Summary for Subcatchment 224S: Post CY (se)
Runoff = 13.82 cfs @ 11.96 hrs, Volume= 0.622 af, Depth> 2.34"
Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-24.00 hrs, dt= 0.03 hrs
Type II 24-hr 10 yr Rainfall=5.52"
Area (ac) CN Description
3.190 69
3.190 100.00% Pervious Area
Tc Length Slope Velocity Capacity Description
min) (feet) (ft/ft) (ft/sec) (cfs)
5.0 Direct Entry,
Subcatchment 224S: Post CY (se)
Runoff
Hydrograph
Time (hours)
242220181614121086420Flow (
cfs)
14
12
10
8
6
4
2
0 Type II 24-
hr 10 yr Rainfall=5.
52"Runoff Area=3.190
ac Runoff Volume=0.622
af Runoff Depth>2.
34"Tc=5.0
min CN=
69 13.82
Type II 24-hr 10 yr Rainfall=5.52"Site ContractorY10A
Printed 2/12/2018PreparedbyAECOM
Page110HydroCAD® 10.00-16 s/n 04851 © 2015 HydroCAD Software Solutions LLC
Hydrograph for Subcatchment 224S: Post CY (se)
Time
hours)
Precip.
inches)
Excess
inches)
Runoff
cfs)
0.00 0.00 0.00 0.00
0.30 0.02 0.00 0.00
0.60 0.03 0.00 0.00
0.90 0.05 0.00 0.00
1.20 0.07 0.00 0.00
1.50 0.09 0.00 0.00
1.80 0.11 0.00 0.00
2.10 0.13 0.00 0.00
2.40 0.15 0.00 0.00
2.70 0.17 0.00 0.00
3.00 0.19 0.00 0.00
3.30 0.21 0.00 0.00
3.60 0.23 0.00 0.00
3.90 0.26 0.00 0.00
4.20 0.28 0.00 0.00
4.50 0.30 0.00 0.00
4.80 0.33 0.00 0.00
5.10 0.36 0.00 0.00
5.40 0.38 0.00 0.00
5.70 0.41 0.00 0.00
6.00 0.44 0.00 0.00
6.30 0.47 0.00 0.00
6.60 0.50 0.00 0.00
6.90 0.54 0.00 0.00
7.20 0.57 0.00 0.00
7.50 0.60 0.00 0.00
7.80 0.64 0.00 0.00
8.10 0.67 0.00 0.00
8.40 0.72 0.00 0.00
8.70 0.76 0.00 0.00
9.00 0.81 0.00 0.00
9.30 0.86 0.00 0.00
9.60 0.92 0.00 0.00
9.90 0.98 0.00 0.02
10.20 1.05 0.00 0.04
10.50 1.13 0.01 0.08
10.80 1.22 0.02 0.13
11.10 1.34 0.04 0.21
11.40 1.50 0.07 0.38
11.70 1.96 0.20 2.17
12.00 3.66 1.05 12.11
12.30 3.94 1.23 1.70
12.60 4.10 1.33 1.01
12.90 4.23 1.42 0.83
13.20 4.33 1.48 0.69
13.50 4.41 1.54 0.60
13.80 4.48 1.59 0.52
14.10 4.55 1.63 0.46
14.40 4.61 1.68 0.43
14.70 4.66 1.71 0.41
15.00 4.71 1.75 0.38
15.30 4.76 1.78 0.36
15.60 4.80 1.82 0.33
Time
hours)
Precip.
inches)
Excess
inches)
Runoff
cfs)
15.90 4.84 1.85 0.31
16.20 4.88 1.87 0.29
16.50 4.92 1.90 0.28
16.80 4.95 1.92 0.27
17.10 4.99 1.95 0.26
17.40 5.02 1.97 0.25
17.70 5.05 2.00 0.25
18.00 5.08 2.02 0.24
18.30 5.11 2.04 0.23
18.60 5.14 2.06 0.22
18.90 5.17 2.08 0.21
19.20 5.19 2.10 0.20
19.50 5.22 2.12 0.19
19.80 5.24 2.13 0.18
20.10 5.26 2.15 0.17
20.40 5.28 2.17 0.17
20.70 5.30 2.18 0.17
21.00 5.33 2.20 0.17
21.30 5.35 2.21 0.16
21.60 5.37 2.23 0.16
21.90 5.39 2.24 0.16
22.20 5.41 2.26 0.16
22.50 5.43 2.27 0.16
22.80 5.45 2.29 0.16
23.10 5.46 2.30 0.15
23.40 5.48 2.32 0.15
23.70 5.50 2.33 0.15
24.00 5.52 2.34 0.15
Type II 24-hr 10 yr Rainfall=5.52"Site ContractorY10A
Printed 2/12/2018PreparedbyAECOM
Page111HydroCAD® 10.00-16 s/n 04851 © 2015 HydroCAD Software Solutions LLC
Summary for Pond 221P: 221
Inflow Area = 24.590 ac, 0.00% Impervious, Inflow Depth > 4.05" for 10 yr event
Inflow = 128.95 cfs @ 12.06 hrs, Volume= 8.294 af
Outflow = 63.57 cfs @ 12.21 hrs, Volume= 5.152 af, Atten= 51%, Lag= 9.5 min
Primary = 63.57 cfs @ 12.21 hrs, Volume= 5.152 af
Routing by Stor-Ind method, Time Span= 0.00-24.00 hrs, dt= 0.03 hrs
Peak Elev= 94.11' @ 12.21 hrs Surf.Area= 63,136 sf Storage= 171,159 cf
Plug-Flow detention time= 187.8 min calculated for 5.145 af (62% of inflow)
Center-of-Mass det. time= 86.2 min ( 886.3 - 800.1 )
Volume Invert Avail.Storage Storage Description
1 91.00' 196,497 cf Custom Stage Data (Prismatic) Listed below (Recalc)
Elevation Surf.Area Inc.Store Cum.Store
feet) (sq-ft) (cubic-feet) (cubic-feet)
91.00 29,222 0 0
91.50 51,128 20,088 20,088
92.00 54,024 26,288 46,376
92.50 56,935 27,740 74,115
93.00 59,864 29,200 103,315
94.00 62,500 61,182 164,497
94.50 65,500 32,000 196,497
Device Routing Invert Outlet Devices
1 Primary 93.50'50.0' long x 5.0' 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 3.50 4.00 4.50 5.00 5.50
Coef. (English) 2.34 2.50 2.70 2.68 2.68 2.66 2.65 2.65 2.65
2.65 2.67 2.66 2.68 2.70 2.74 2.79 2.88
Primary OutFlow Max=63.43 cfs @ 12.21 hrs HW=94.10' (Free Discharge)
1=Broad-Crested Rectangular Weir (Weir Controls 63.43 cfs @ 2.10 fps)
Type II 24-hr 10 yr Rainfall=5.52"Site ContractorY10A
Printed 2/12/2018PreparedbyAECOM
Page112HydroCAD® 10.00-16 s/n 04851 © 2015 HydroCAD Software Solutions LLC
Pond 221P: 221
Inflow
Primary
Hydrograph
Time (hours)
242220181614121086420Flow (
cfs)
140
120
100
80
60
40
20
0 Inflow Area=24.590
ac Peak Elev=94.
11'Storage=171,159
cf 128.95
cfs 63.57
cfs Pond 221P:
221
Primary Stage-
Discharge Discharge (
cfs)
1301201101009080706050403020100Elevation (
feet)
94
93
92 91 Broad-Crested
Type II 24-hr 10 yr Rainfall=5.52"Site ContractorY10A
Printed 2/12/2018PreparedbyAECOM
Page113HydroCAD® 10.00-16 s/n 04851 © 2015 HydroCAD Software Solutions LLC
Pond 221P: 221
Surface
Storage
Stage-Area-Storage
Storage (cubic-feet)
150,000100,00050,0000
Surface/Horizontal/Wetted Area (sq-ft)
60,00050,00040,00030,00020,00010,0000
Elevation (
feet)
94
93
92 91 Custom
Type II 24-hr 10 yr Rainfall=5.52"Site ContractorY10A
Printed 2/12/2018PreparedbyAECOM
Page114HydroCAD® 10.00-16 s/n 04851 © 2015 HydroCAD Software Solutions LLC
Hydrograph for Pond 221P: 221
Time
hours)
Inflow
cfs)
Storage
cubic-feet)
Elevation
feet)
Primary
cfs)
0.00 0.00 0 91.00 0.00
0.60 0.00 0 91.00 0.00
1.20 0.00 0 91.00 0.00
1.80 0.00 0 91.00 0.00
2.40 0.00 0 91.00 0.00
3.00 0.00 0 91.00 0.00
3.60 0.00 0 91.00 0.00
4.20 0.00 0 91.00 0.00
4.80 0.04 14 91.00 0.00
5.40 0.18 248 91.01 0.00
6.00 0.35 819 91.03 0.00
6.60 0.53 1,761 91.06 0.00
7.20 0.72 3,102 91.10 0.00
7.80 0.92 4,867 91.15 0.00
8.40 1.21 7,107 91.21 0.00
9.00 1.73 10,262 91.29 0.00
9.60 2.11 14,488 91.38 0.00
10.20 2.93 19,793 91.49 0.00
10.80 4.52 27,665 91.65 0.00
11.40 8.17 40,610 91.89 0.00
12.00 114.94 111,849 93.14 0.00
12.60 14.93 153,957 93.83 23.27
13.20 7.93 145,260 93.69 9.72
13.80 5.79 142,644 93.65 6.68
14.40 4.57 141,121 93.62 5.05
15.00 4.04 140,342 93.61 4.33
15.60 3.51 139,749 93.60 3.77
16.20 2.99 139,179 93.59 3.24
16.80 2.77 138,778 93.58 2.92
17.40 2.58 138,501 93.58 2.70
18.00 2.39 138,248 93.58 2.51
18.60 2.20 137,998 93.57 2.32
19.20 2.01 137,749 93.57 2.13
19.80 1.82 137,499 93.56 1.93
20.40 1.67 137,264 93.56 1.75
21.00 1.63 137,153 93.56 1.67
21.60 1.60 137,092 93.56 1.62
22.20 1.56 137,041 93.56 1.58
22.80 1.52 136,991 93.56 1.54
23.40 1.48 136,941 93.55 1.51
24.00 1.44 136,882 93.55 1.47
Type II 24-hr 10 yr Rainfall=5.52"Site ContractorY10A
Printed 2/12/2018PreparedbyAECOM
Page115HydroCAD® 10.00-16 s/n 04851 © 2015 HydroCAD Software Solutions LLC
Stage-Discharge for Pond 221P: 221
Elevation
feet)
Primary
cfs)
91.00 0.00
91.02 0.00
91.04 0.00
91.06 0.00
91.08 0.00
91.10 0.00
91.12 0.00
91.14 0.00
91.16 0.00
91.18 0.00
91.20 0.00
91.22 0.00
91.24 0.00
91.26 0.00
91.28 0.00
91.30 0.00
91.32 0.00
91.34 0.00
91.36 0.00
91.38 0.00
91.40 0.00
91.42 0.00
91.44 0.00
91.46 0.00
91.48 0.00
91.50 0.00
91.52 0.00
91.54 0.00
91.56 0.00
91.58 0.00
91.60 0.00
91.62 0.00
91.64 0.00
91.66 0.00
91.68 0.00
91.70 0.00
91.72 0.00
91.74 0.00
91.76 0.00
91.78 0.00
91.80 0.00
91.82 0.00
91.84 0.00
91.86 0.00
91.88 0.00
91.90 0.00
91.92 0.00
91.94 0.00
91.96 0.00
91.98 0.00
92.00 0.00
92.02 0.00
92.04 0.00
Elevation
feet)
Primary
cfs)
92.06 0.00
92.08 0.00
92.10 0.00
92.12 0.00
92.14 0.00
92.16 0.00
92.18 0.00
92.20 0.00
92.22 0.00
92.24 0.00
92.26 0.00
92.28 0.00
92.30 0.00
92.32 0.00
92.34 0.00
92.36 0.00
92.38 0.00
92.40 0.00
92.42 0.00
92.44 0.00
92.46 0.00
92.48 0.00
92.50 0.00
92.52 0.00
92.54 0.00
92.56 0.00
92.58 0.00
92.60 0.00
92.62 0.00
92.64 0.00
92.66 0.00
92.68 0.00
92.70 0.00
92.72 0.00
92.74 0.00
92.76 0.00
92.78 0.00
92.80 0.00
92.82 0.00
92.84 0.00
92.86 0.00
92.88 0.00
92.90 0.00
92.92 0.00
92.94 0.00
92.96 0.00
92.98 0.00
93.00 0.00
93.02 0.00
93.04 0.00
93.06 0.00
93.08 0.00
93.10 0.00
Elevation
feet)
Primary
cfs)
93.12 0.00
93.14 0.00
93.16 0.00
93.18 0.00
93.20 0.00
93.22 0.00
93.24 0.00
93.26 0.00
93.28 0.00
93.30 0.00
93.32 0.00
93.34 0.00
93.36 0.00
93.38 0.00
93.40 0.00
93.42 0.00
93.44 0.00
93.46 0.00
93.48 0.00
93.50 0.00
93.52 0.33
93.54 0.94
93.56 1.72
93.58 2.65
93.60 3.70
93.62 4.86
93.64 6.13
93.66 7.49
93.68 8.94
93.70 10.46
93.72 12.16
93.74 13.94
93.76 15.83
93.78 17.81
93.80 19.88
93.82 22.05
93.84 24.31
93.86 26.65
93.88 29.09
93.90 31.62
93.92 34.30
93.94 37.07
93.96 39.93
93.98 42.90
94.00 45.96
94.02 49.12
94.04 52.38
94.06 55.74
94.08 59.19
94.10 62.74
94.12 65.86
94.14 69.02
94.16 72.22
Elevation
feet)
Primary
cfs)
94.18 75.48
94.20 78.77
94.22 82.11
94.24 85.49
94.26 88.91
94.28 92.38
94.30 95.88
94.32 99.50
94.34 103.16
94.36 106.87
94.38 110.62
94.40 114.41
94.42 118.25
94.44 122.12
94.46 126.04
94.48 130.00
94.50 134.00
Type II 24-hr 10 yr Rainfall=5.52"Site ContractorY10A
Printed 2/12/2018PreparedbyAECOM
Page116HydroCAD® 10.00-16 s/n 04851 © 2015 HydroCAD Software Solutions LLC
Stage-Area-Storage for Pond 221P: 221
Elevation
feet)
Surface
sq-ft)
Storage
cubic-feet)
91.00 29,222 0
91.05 31,413 1,516
91.10 33,603 3,141
91.15 35,794 4,876
91.20 37,984 6,721
91.25 40,175 8,675
91.30 42,366 10,738
91.35 44,556 12,911
91.40 46,747 15,194
91.45 48,937 17,586
91.50 51,128 20,088
91.55 51,418 22,651
91.60 51,707 25,229
91.65 51,997 27,822
91.70 52,286 30,429
91.75 52,576 33,051
91.80 52,866 35,687
91.85 53,155 38,337
91.90 53,445 41,002
91.95 53,734 43,682
92.00 54,024 46,376
92.05 54,315 49,084
92.10 54,606 51,807
92.15 54,897 54,545
92.20 55,188 57,297
92.25 55,480 60,063
92.30 55,771 62,845
92.35 56,062 65,640
92.40 56,353 68,451
92.45 56,644 71,276
92.50 56,935 74,115
92.55 57,228 76,969
92.60 57,521 79,838
92.65 57,814 82,721
92.70 58,107 85,619
92.75 58,400 88,532
92.80 58,692 91,459
92.85 58,985 94,401
92.90 59,278 97,358
92.95 59,571 100,329
93.00 59,864 103,315
93.05 59,996 106,311
93.10 60,128 109,315
93.15 60,259 112,324
93.20 60,391 115,341
93.25 60,523 118,363
93.30 60,655 121,393
93.35 60,787 124,429
93.40 60,918 127,471
93.45 61,050 130,521
93.50 61,182 133,577
93.55 61,314 136,639
93.60 61,446 139,708
Elevation
feet)
Surface
sq-ft)
Storage
cubic-feet)
93.65 61,577 142,783
93.70 61,709 145,866
93.75 61,841 148,954
93.80 61,973 152,050
93.85 62,105 155,152
93.90 62,236 158,260
93.95 62,368 161,375
94.00 62,500 164,497
94.05 62,800 167,629
94.10 63,100 170,777
94.15 63,400 173,940
94.20 63,700 177,117
94.25 64,000 180,310
94.30 64,300 183,517
94.35 64,600 186,739
94.40 64,900 189,977
94.45 65,200 193,230
94.50 65,500 196,497
Type II 24-hr 10 yr Rainfall=5.52"Site ContractorY10A
Printed 2/12/2018PreparedbyAECOM
Page117HydroCAD® 10.00-16 s/n 04851 © 2015 HydroCAD Software Solutions LLC
Summary for Pond 222P: SF
Inflow Area = 5.330 ac, 0.00% Impervious, Inflow Depth > 3.85" for 10 yr event
Inflow = 36.13 cfs @ 11.96 hrs, Volume= 1.709 af
Outflow = 18.63 cfs @ 12.04 hrs, Volume= 1.078 af, Atten= 48%, Lag= 5.1 min
Primary = 18.63 cfs @ 12.04 hrs, Volume= 1.078 af
Routing by Stor-Ind method, Time Span= 0.00-24.00 hrs, dt= 0.03 hrs
Peak Elev= 92.29' @ 12.04 hrs Surf.Area= 28,165 sf Storage= 35,032 cf
Plug-Flow detention time= 184.1 min calculated for 1.076 af (63% of inflow)
Center-of-Mass det. time= 81.1 min ( 880.2 - 799.1 )
Volume Invert Avail.Storage Storage Description
1 90.50' 55,826 cf Custom Stage Data (Prismatic) Listed below (Recalc)
Elevation Surf.Area Inc.Store Cum.Store
feet) (sq-ft) (cubic-feet) (cubic-feet)
90.50 4,842 0 0
91.00 18,475 5,829 5,829
91.50 19,525 9,500 15,329
92.00 27,321 11,712 27,041
93.00 30,250 28,786 55,826
Device Routing Invert Outlet Devices
1 Primary 92.00'50.0' long x 5.0' 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 3.50 4.00 4.50 5.00 5.50
Coef. (English) 2.34 2.50 2.70 2.68 2.68 2.66 2.65 2.65 2.65
2.65 2.67 2.66 2.68 2.70 2.74 2.79 2.88
Primary OutFlow Max=18.13 cfs @ 12.04 hrs HW=92.28' (Free Discharge)
1=Broad-Crested Rectangular Weir (Weir Controls 18.13 cfs @ 1.28 fps)
Type II 24-hr 10 yr Rainfall=5.52"Site ContractorY10A
Printed 2/12/2018PreparedbyAECOM
Page118HydroCAD® 10.00-16 s/n 04851 © 2015 HydroCAD Software Solutions LLC
Pond 222P: SF
Inflow
Primary
Hydrograph
Time (hours)
242220181614121086420Flow (
cfs)
40
35
30
25
20
15
10
5
0 Inflow Area=5.330
ac Peak Elev=92.
29'Storage=35,032
cf 36.13
cfs 18.63
cfs Pond 222P:
SF
Primary Stage-
Discharge Discharge (
cfs)
1301201101009080706050403020100Elevation (
feet)
93
92 91 Broad-Crested
Type II 24-hr 10 yr Rainfall=5.52"Site ContractorY10A
Printed 2/12/2018PreparedbyAECOM
Page119HydroCAD® 10.00-16 s/n 04851 © 2015 HydroCAD Software Solutions LLC
Pond 222P: SF
Surface
Storage
Stage-Area-Storage
Storage (cubic-feet)
40,00020,0000
Surface/Horizontal/Wetted Area (sq-ft)
30,00025,00020,00015,00010,0005,0000
Elevation (
feet)
93
92 91 Custom
Type II 24-hr 10 yr Rainfall=5.52"Site ContractorY10A
Printed 2/12/2018PreparedbyAECOM
Page120HydroCAD® 10.00-16 s/n 04851 © 2015 HydroCAD Software Solutions LLC
Hydrograph for Pond 222P: SF
Time
hours)
Inflow
cfs)
Storage
cubic-feet)
Elevation
feet)
Primary
cfs)
0.00 0.00 0 90.50 0.00
0.60 0.00 0 90.50 0.00
1.20 0.00 0 90.50 0.00
1.80 0.00 0 90.50 0.00
2.40 0.00 0 90.50 0.00
3.00 0.00 0 90.50 0.00
3.60 0.00 0 90.50 0.00
4.20 0.00 0 90.50 0.00
4.80 0.00 0 90.50 0.00
5.40 0.01 6 90.50 0.00
6.00 0.05 69 90.51 0.00
6.60 0.08 205 90.54 0.00
7.20 0.12 421 90.57 0.00
7.80 0.16 723 90.61 0.00
8.40 0.23 1,130 90.66 0.00
9.00 0.34 1,735 90.72 0.00
9.60 0.40 2,536 90.79 0.00
10.20 0.61 3,608 90.87 0.00
10.80 0.98 5,270 90.97 0.00
11.40 1.90 8,180 91.13 0.00
12.00 30.52 33,851 92.25 14.51
12.60 2.32 29,497 92.09 3.15
13.20 1.54 28,683 92.06 1.74
13.80 1.15 28,374 92.05 1.26
14.40 0.94 28,162 92.04 1.00
15.00 0.83 28,058 92.04 0.87
15.60 0.72 27,966 92.03 0.76
16.20 0.62 27,878 92.03 0.65
16.80 0.58 27,833 92.03 0.60
17.40 0.54 27,800 92.03 0.56
18.00 0.50 27,767 92.03 0.51
18.60 0.46 27,734 92.03 0.47
19.20 0.42 27,694 92.02 0.44
19.80 0.38 27,639 92.02 0.40
20.40 0.35 27,588 92.02 0.37
21.00 0.35 27,565 92.02 0.35
21.60 0.34 27,550 92.02 0.34
22.20 0.33 27,538 92.02 0.34
22.80 0.32 27,526 92.02 0.33
23.40 0.31 27,514 92.02 0.32
24.00 0.31 27,502 92.02 0.31
Type II 24-hr 10 yr Rainfall=5.52"Site ContractorY10A
Printed 2/12/2018PreparedbyAECOM
Page121HydroCAD® 10.00-16 s/n 04851 © 2015 HydroCAD Software Solutions LLC
Stage-Discharge for Pond 222P: SF
Elevation
feet)
Primary
cfs)
90.50 0.00
90.52 0.00
90.54 0.00
90.56 0.00
90.58 0.00
90.60 0.00
90.62 0.00
90.64 0.00
90.66 0.00
90.68 0.00
90.70 0.00
90.72 0.00
90.74 0.00
90.76 0.00
90.78 0.00
90.80 0.00
90.82 0.00
90.84 0.00
90.86 0.00
90.88 0.00
90.90 0.00
90.92 0.00
90.94 0.00
90.96 0.00
90.98 0.00
91.00 0.00
91.02 0.00
91.04 0.00
91.06 0.00
91.08 0.00
91.10 0.00
91.12 0.00
91.14 0.00
91.16 0.00
91.18 0.00
91.20 0.00
91.22 0.00
91.24 0.00
91.26 0.00
91.28 0.00
91.30 0.00
91.32 0.00
91.34 0.00
91.36 0.00
91.38 0.00
91.40 0.00
91.42 0.00
91.44 0.00
91.46 0.00
91.48 0.00
91.50 0.00
91.52 0.00
91.54 0.00
Elevation
feet)
Primary
cfs)
91.56 0.00
91.58 0.00
91.60 0.00
91.62 0.00
91.64 0.00
91.66 0.00
91.68 0.00
91.70 0.00
91.72 0.00
91.74 0.00
91.76 0.00
91.78 0.00
91.80 0.00
91.82 0.00
91.84 0.00
91.86 0.00
91.88 0.00
91.90 0.00
91.92 0.00
91.94 0.00
91.96 0.00
91.98 0.00
92.00 0.00
92.02 0.33
92.04 0.94
92.06 1.72
92.08 2.65
92.10 3.70
92.12 4.86
92.14 6.13
92.16 7.49
92.18 8.94
92.20 10.46
92.22 12.16
92.24 13.94
92.26 15.83
92.28 17.81
92.30 19.88
92.32 22.05
92.34 24.31
92.36 26.65
92.38 29.09
92.40 31.62
92.42 34.30
92.44 37.07
92.46 39.93
92.48 42.90
92.50 45.96
92.52 49.12
92.54 52.38
92.56 55.74
92.58 59.19
92.60 62.74
Elevation
feet)
Primary
cfs)
92.62 65.86
92.64 69.02
92.66 72.22
92.68 75.48
92.70 78.77
92.72 82.11
92.74 85.49
92.76 88.91
92.78 92.38
92.80 95.88
92.82 99.50
92.84 103.16
92.86 106.87
92.88 110.62
92.90 114.41
92.92 118.25
92.94 122.12
92.96 126.04
92.98 130.00
93.00 134.00
Type II 24-hr 10 yr Rainfall=5.52"Site ContractorY10A
Printed 2/12/2018PreparedbyAECOM
Page122HydroCAD® 10.00-16 s/n 04851 © 2015 HydroCAD Software Solutions LLC
Stage-Area-Storage for Pond 222P: SF
Elevation
feet)
Surface
sq-ft)
Storage
cubic-feet)
90.50 4,842 0
90.55 6,205 276
90.60 7,569 621
90.65 8,932 1,033
90.70 10,295 1,514
90.75 11,659 2,063
90.80 13,022 2,680
90.85 14,385 3,365
90.90 15,748 4,118
90.95 17,112 4,940
91.00 18,475 5,829
91.05 18,580 6,756
91.10 18,685 7,687
91.15 18,790 8,624
91.20 18,895 9,566
91.25 19,000 10,514
91.30 19,105 11,466
91.35 19,210 12,424
91.40 19,315 13,387
91.45 19,420 14,356
91.50 19,525 15,329
91.55 20,305 16,325
91.60 21,084 17,360
91.65 21,864 18,433
91.70 22,643 19,546
91.75 23,423 20,698
91.80 24,203 21,888
91.85 24,982 23,118
91.90 25,762 24,387
91.95 26,541 25,694
92.00 27,321 27,041
92.05 27,467 28,410
92.10 27,614 29,787
92.15 27,760 31,172
92.20 27,907 32,564
92.25 28,053 33,963
92.30 28,200 35,369
92.35 28,346 36,783
92.40 28,493 38,203
92.45 28,639 39,632
92.50 28,786 41,067
92.55 28,932 42,510
92.60 29,078 43,961
92.65 29,225 45,418
92.70 29,371 46,883
92.75 29,518 48,355
92.80 29,664 49,835
92.85 29,811 51,322
92.90 29,957 52,816
92.95 30,104 54,317
93.00 30,250 55,826
Type II 24-hr 10 yr Rainfall=5.52"Site ContractorY10A
Printed 2/12/2018PreparedbyAECOM
Page123HydroCAD® 10.00-16 s/n 04851 © 2015 HydroCAD Software Solutions LLC
Summary for Pond 223P: 223
Inflow Area = 3.710 ac, 0.00% Impervious, Inflow Depth > 4.27" for 10 yr event
Inflow = 27.08 cfs @ 11.96 hrs, Volume= 1.319 af
Outflow = 6.78 cfs @ 12.10 hrs, Volume= 0.617 af, Atten= 75%, Lag= 8.3 min
Primary = 6.78 cfs @ 12.10 hrs, Volume= 0.617 af
Routing by Stor-Ind method, Time Span= 0.00-24.00 hrs, dt= 0.03 hrs
Peak Elev= 94.15' @ 12.10 hrs Surf.Area= 13,475 sf Storage= 32,427 cf
Plug-Flow detention time= 245.0 min calculated for 0.617 af (47% of inflow)
Center-of-Mass det. time= 129.4 min ( 915.6 - 786.3 )
Volume Invert Avail.Storage Storage Description
1 90.50' 44,430 cf Custom Stage Data (Prismatic) Listed below (Recalc)
Elevation Surf.Area Inc.Store Cum.Store
feet) (sq-ft) (cubic-feet) (cubic-feet)
90.50 5,898 0 0
92.00 7,314 9,909 9,909
92.50 8,772 4,022 13,931
93.00 10,247 4,755 18,685
93.50 11,740 5,497 24,182
94.00 13,251 6,248 30,430
95.00 14,750 14,001 44,430
Device Routing Invert Outlet Devices
1 Primary 94.00'50.0' long x 5.0' 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 3.50 4.00 4.50 5.00 5.50
Coef. (English) 2.34 2.50 2.70 2.68 2.68 2.66 2.65 2.65 2.65
2.65 2.67 2.66 2.68 2.70 2.74 2.79 2.88
Primary OutFlow Max=6.65 cfs @ 12.10 hrs HW=94.15' (Free Discharge)
1=Broad-Crested Rectangular Weir (Weir Controls 6.65 cfs @ 0.90 fps)
Type II 24-hr 10 yr Rainfall=5.52"Site ContractorY10A
Printed 2/12/2018PreparedbyAECOM
Page124HydroCAD® 10.00-16 s/n 04851 © 2015 HydroCAD Software Solutions LLC
Pond 223P: 223
Inflow
Primary
Hydrograph
Time (hours)
242220181614121086420Flow (
cfs)
30
25
20
15
10
5
0 Inflow Area=3.710
ac Peak Elev=94.
15'Storage=32,427
cf 27.08
cfs 6.78
cfs Pond 223P:
223
Primary Stage-
Discharge Discharge (
cfs)
1301201101009080706050403020100Elevation (
feet)
95
94
93
92 91 Broad-Crested
Type II 24-hr 10 yr Rainfall=5.52"Site ContractorY10A
Printed 2/12/2018PreparedbyAECOM
Page125HydroCAD® 10.00-16 s/n 04851 © 2015 HydroCAD Software Solutions LLC
Pond 223P: 223
Surface
Storage
Stage-Area-Storage
Storage (cubic-feet)
40,00030,00020,00010,0000
Surface/Horizontal/Wetted Area (sq-ft)
14,00012,00010,0008,0006,0004,0002,0000
Elevation (
feet)
95
94
93 92 91 Custom
Type II 24-hr 10 yr Rainfall=5.52"Site ContractorY10A
Printed 2/12/2018PreparedbyAECOM
Page126HydroCAD® 10.00-16 s/n 04851 © 2015 HydroCAD Software Solutions LLC
Hydrograph for Pond 223P: 223
Time
hours)
Inflow
cfs)
Storage
cubic-feet)
Elevation
feet)
Primary
cfs)
0.00 0.00 0 90.50 0.00
0.60 0.00 0 90.50 0.00
1.20 0.00 0 90.50 0.00
1.80 0.00 0 90.50 0.00
2.40 0.00 0 90.50 0.00
3.00 0.00 0 90.50 0.00
3.60 0.00 0 90.50 0.00
4.20 0.01 8 90.50 0.00
4.80 0.04 60 90.51 0.00
5.40 0.06 166 90.53 0.00
6.00 0.09 330 90.56 0.00
6.60 0.12 558 90.59 0.00
7.20 0.15 852 90.64 0.00
7.80 0.18 1,215 90.70 0.00
8.40 0.24 1,664 90.78 0.00
9.00 0.34 2,287 90.88 0.00
9.60 0.38 3,068 91.00 0.00
10.20 0.55 4,066 91.15 0.00
10.80 0.86 5,546 91.38 0.00
11.40 1.58 8,025 91.74 0.00
12.00 22.70 29,165 93.90 0.00
12.60 1.69 31,283 94.06 1.95
13.20 1.12 31,031 94.05 1.21
13.80 0.83 30,892 94.03 0.88
14.40 0.68 30,813 94.03 0.70
15.00 0.60 30,777 94.03 0.62
15.60 0.52 30,742 94.02 0.54
16.20 0.45 30,709 94.02 0.46
16.80 0.42 30,695 94.02 0.42
17.40 0.39 30,682 94.02 0.40
18.00 0.36 30,669 94.02 0.37
18.60 0.33 30,657 94.02 0.34
19.20 0.30 30,644 94.02 0.31
19.80 0.27 30,631 94.02 0.28
20.40 0.25 30,622 94.01 0.26
21.00 0.25 30,620 94.01 0.25
21.60 0.24 30,617 94.01 0.24
22.20 0.24 30,615 94.01 0.24
22.80 0.23 30,612 94.01 0.23
23.40 0.23 30,610 94.01 0.23
24.00 0.22 30,607 94.01 0.22
Type II 24-hr 10 yr Rainfall=5.52"Site ContractorY10A
Printed 2/12/2018PreparedbyAECOM
Page127HydroCAD® 10.00-16 s/n 04851 © 2015 HydroCAD Software Solutions LLC
Stage-Discharge for Pond 223P: 223
Elevation
feet)
Primary
cfs)
90.50 0.00
90.55 0.00
90.60 0.00
90.65 0.00
90.70 0.00
90.75 0.00
90.80 0.00
90.85 0.00
90.90 0.00
90.95 0.00
91.00 0.00
91.05 0.00
91.10 0.00
91.15 0.00
91.20 0.00
91.25 0.00
91.30 0.00
91.35 0.00
91.40 0.00
91.45 0.00
91.50 0.00
91.55 0.00
91.60 0.00
91.65 0.00
91.70 0.00
91.75 0.00
91.80 0.00
91.85 0.00
91.90 0.00
91.95 0.00
92.00 0.00
92.05 0.00
92.10 0.00
92.15 0.00
92.20 0.00
92.25 0.00
92.30 0.00
92.35 0.00
92.40 0.00
92.45 0.00
92.50 0.00
92.55 0.00
92.60 0.00
92.65 0.00
92.70 0.00
92.75 0.00
92.80 0.00
92.85 0.00
92.90 0.00
92.95 0.00
93.00 0.00
93.05 0.00
93.10 0.00
Elevation
feet)
Primary
cfs)
93.15 0.00
93.20 0.00
93.25 0.00
93.30 0.00
93.35 0.00
93.40 0.00
93.45 0.00
93.50 0.00
93.55 0.00
93.60 0.00
93.65 0.00
93.70 0.00
93.75 0.00
93.80 0.00
93.85 0.00
93.90 0.00
93.95 0.00
94.00 0.00
94.05 1.31
94.10 3.70
94.15 6.80
94.20 10.46
94.25 14.88
94.30 19.88
94.35 25.47
94.40 31.62
94.45 38.49
94.50 45.96
94.55 54.05
94.60 62.74
94.65 70.62
94.70 78.77
94.75 87.20
94.80 95.88
94.85 105.01
94.90 114.41
94.95 124.08
95.00 134.00
Type II 24-hr 10 yr Rainfall=5.52"Site ContractorY10A
Printed 2/12/2018PreparedbyAECOM
Page128HydroCAD® 10.00-16 s/n 04851 © 2015 HydroCAD Software Solutions LLC
Stage-Area-Storage for Pond 223P: 223
Elevation
feet)
Surface
sq-ft)
Storage
cubic-feet)
90.50 5,898 0
90.55 5,945 296
90.60 5,992 595
90.65 6,040 895
90.70 6,087 1,198
90.75 6,134 1,504
90.80 6,181 1,812
90.85 6,228 2,122
90.90 6,276 2,435
90.95 6,323 2,750
91.00 6,370 3,067
91.05 6,417 3,387
91.10 6,464 3,709
91.15 6,512 4,033
91.20 6,559 4,360
91.25 6,606 4,689
91.30 6,653 5,020
91.35 6,700 5,354
91.40 6,748 5,691
91.45 6,795 6,029
91.50 6,842 6,370
91.55 6,889 6,713
91.60 6,936 7,059
91.65 6,984 7,407
91.70 7,031 7,757
91.75 7,078 8,110
91.80 7,125 8,465
91.85 7,172 8,823
91.90 7,220 9,182
91.95 7,267 9,544
92.00 7,314 9,909
92.05 7,460 10,278
92.10 7,606 10,655
92.15 7,751 11,039
92.20 7,897 11,430
92.25 8,043 11,829
92.30 8,189 12,234
92.35 8,335 12,648
92.40 8,480 13,068
92.45 8,626 13,496
92.50 8,772 13,931
92.55 8,919 14,373
92.60 9,067 14,822
92.65 9,215 15,279
92.70 9,362 15,744
92.75 9,510 16,216
92.80 9,657 16,695
92.85 9,804 17,181
92.90 9,952 17,675
92.95 10,100 18,177
93.00 10,247 18,685
93.05 10,396 19,201
93.10 10,546 19,725
Elevation
feet)
Surface
sq-ft)
Storage
cubic-feet)
93.15 10,695 20,256
93.20 10,844 20,794
93.25 10,994 21,340
93.30 11,143 21,894
93.35 11,292 22,455
93.40 11,441 23,023
93.45 11,591 23,599
93.50 11,740 24,182
93.55 11,891 24,773
93.60 12,042 25,371
93.65 12,193 25,977
93.70 12,344 26,590
93.75 12,496 27,211
93.80 12,647 27,840
93.85 12,798 28,476
93.90 12,949 29,120
93.95 13,100 29,771
94.00 13,251 30,430
94.05 13,326 31,094
94.10 13,401 31,762
94.15 13,476 32,434
94.20 13,551 33,110
94.25 13,626 33,789
94.30 13,701 34,473
94.35 13,776 35,159
94.40 13,851 35,850
94.45 13,926 36,544
94.50 14,001 37,243
94.55 14,075 37,945
94.60 14,150 38,650
94.65 14,225 39,360
94.70 14,300 40,073
94.75 14,375 40,790
94.80 14,450 41,510
94.85 14,525 42,235
94.90 14,600 42,963
94.95 14,675 43,695
95.00 14,750 44,430
Type II 24-hr 10 yr Rainfall=5.52"Site ContractorY10A
Printed 2/12/2018PreparedbyAECOM
Page129HydroCAD® 10.00-16 s/n 04851 © 2015 HydroCAD Software Solutions LLC
Summary for Pond 224P: 224
Inflow Area = 3.190 ac, 0.00% Impervious, Inflow Depth > 2.34" for 10 yr event
Inflow = 13.82 cfs @ 11.96 hrs, Volume= 0.622 af
Outflow = 0.94 cfs @ 12.72 hrs, Volume= 0.286 af, Atten= 93%, Lag= 45.3 min
Primary = 0.94 cfs @ 12.72 hrs, Volume= 0.286 af
Routing by Stor-Ind method, Time Span= 0.00-24.00 hrs, dt= 0.03 hrs
Peak Elev= 92.04' @ 12.72 hrs Surf.Area= 9,265 sf Storage= 14,910 cf
Plug-Flow detention time= 278.2 min calculated for 0.286 af (46% of inflow)
Center-of-Mass det. time= 149.6 min ( 989.6 - 839.9 )
Volume Invert Avail.Storage Storage Description
1 90.00' 24,373 cf Custom Stage Data (Prismatic) Listed below (Recalc)
Elevation Surf.Area Inc.Store Cum.Store
feet) (sq-ft) (cubic-feet) (cubic-feet)
90.00 5,642 0 0
90.50 6,177 2,955 2,955
91.00 7,286 3,366 6,321
91.50 8,188 3,869 10,189
92.00 9,216 4,351 14,540
93.00 10,450 9,833 24,373
Device Routing Invert Outlet Devices
1 Primary 92.00'50.0' long x 5.0' 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 3.50 4.00 4.50 5.00 5.50
Coef. (English) 2.34 2.50 2.70 2.68 2.68 2.66 2.65 2.65 2.65
2.65 2.67 2.66 2.68 2.70 2.74 2.79 2.88
Primary OutFlow Max=0.94 cfs @ 12.72 hrs HW=92.04' (Free Discharge)
1=Broad-Crested Rectangular Weir (Weir Controls 0.94 cfs @ 0.47 fps)
Type II 24-hr 10 yr Rainfall=5.52"Site ContractorY10A
Printed 2/12/2018PreparedbyAECOM
Page130HydroCAD® 10.00-16 s/n 04851 © 2015 HydroCAD Software Solutions LLC
Pond 224P: 224
Inflow
Primary
Hydrograph
Time (hours)
242220181614121086420Flow (
cfs)
14
12
10
8
6
4
2
0 Inflow Area=3.190
ac Peak Elev=92.
04'Storage=14,910
cf 13.82
cfs 0.94
cfs Pond 224P:
224
Primary Stage-
Discharge Discharge (
cfs)
1301201101009080706050403020100Elevation (
feet)
93
92
91 90 Broad-Crested
Type II 24-hr 10 yr Rainfall=5.52"Site ContractorY10A
Printed 2/12/2018PreparedbyAECOM
Page131HydroCAD® 10.00-16 s/n 04851 © 2015 HydroCAD Software Solutions LLC
Pond 224P: 224
Surface
Storage
Stage-Area-Storage
Storage (cubic-feet)
20,00015,00010,0005,0000
Surface/Horizontal/Wetted Area (sq-ft)
10,0008,0006,0004,0002,0000
Elevation (
feet)
93
92
91 90 Custom
Type II 24-hr 10 yr Rainfall=5.52"Site ContractorY10A
Printed 2/12/2018PreparedbyAECOM
Page132HydroCAD® 10.00-16 s/n 04851 © 2015 HydroCAD Software Solutions LLC
Hydrograph for Pond 224P: 224
Time
hours)
Inflow
cfs)
Storage
cubic-feet)
Elevation
feet)
Primary
cfs)
0.00 0.00 0 90.00 0.00
0.60 0.00 0 90.00 0.00
1.20 0.00 0 90.00 0.00
1.80 0.00 0 90.00 0.00
2.40 0.00 0 90.00 0.00
3.00 0.00 0 90.00 0.00
3.60 0.00 0 90.00 0.00
4.20 0.00 0 90.00 0.00
4.80 0.00 0 90.00 0.00
5.40 0.00 0 90.00 0.00
6.00 0.00 0 90.00 0.00
6.60 0.00 0 90.00 0.00
7.20 0.00 0 90.00 0.00
7.80 0.00 0 90.00 0.00
8.40 0.00 0 90.00 0.00
9.00 0.00 0 90.00 0.00
9.60 0.00 0 90.00 0.00
10.20 0.04 42 90.01 0.00
10.80 0.13 214 90.04 0.00
11.40 0.38 707 90.12 0.00
12.00 12.11 9,683 91.44 0.00
12.60 1.01 14,885 92.04 0.86
13.20 0.69 14,839 92.03 0.73
13.80 0.52 14,777 92.03 0.54
14.40 0.43 14,741 92.02 0.44
15.00 0.38 14,725 92.02 0.39
15.60 0.33 14,708 92.02 0.34
16.20 0.29 14,692 92.02 0.29
16.80 0.27 14,686 92.02 0.27
17.40 0.25 14,680 92.02 0.26
18.00 0.24 14,674 92.01 0.24
18.60 0.22 14,667 92.01 0.22
19.20 0.20 14,661 92.01 0.20
19.80 0.18 14,655 92.01 0.18
20.40 0.17 14,650 92.01 0.17
21.00 0.17 14,649 92.01 0.17
21.60 0.16 14,648 92.01 0.16
22.20 0.16 14,647 92.01 0.16
22.80 0.16 14,645 92.01 0.16
23.40 0.15 14,644 92.01 0.15
24.00 0.15 14,643 92.01 0.15
Type II 24-hr 10 yr Rainfall=5.52"Site ContractorY10A
Printed 2/12/2018PreparedbyAECOM
Page133HydroCAD® 10.00-16 s/n 04851 © 2015 HydroCAD Software Solutions LLC
Stage-Discharge for Pond 224P: 224
Elevation
feet)
Primary
cfs)
90.00 0.00
90.02 0.00
90.04 0.00
90.06 0.00
90.08 0.00
90.10 0.00
90.12 0.00
90.14 0.00
90.16 0.00
90.18 0.00
90.20 0.00
90.22 0.00
90.24 0.00
90.26 0.00
90.28 0.00
90.30 0.00
90.32 0.00
90.34 0.00
90.36 0.00
90.38 0.00
90.40 0.00
90.42 0.00
90.44 0.00
90.46 0.00
90.48 0.00
90.50 0.00
90.52 0.00
90.54 0.00
90.56 0.00
90.58 0.00
90.60 0.00
90.62 0.00
90.64 0.00
90.66 0.00
90.68 0.00
90.70 0.00
90.72 0.00
90.74 0.00
90.76 0.00
90.78 0.00
90.80 0.00
90.82 0.00
90.84 0.00
90.86 0.00
90.88 0.00
90.90 0.00
90.92 0.00
90.94 0.00
90.96 0.00
90.98 0.00
91.00 0.00
91.02 0.00
91.04 0.00
Elevation
feet)
Primary
cfs)
91.06 0.00
91.08 0.00
91.10 0.00
91.12 0.00
91.14 0.00
91.16 0.00
91.18 0.00
91.20 0.00
91.22 0.00
91.24 0.00
91.26 0.00
91.28 0.00
91.30 0.00
91.32 0.00
91.34 0.00
91.36 0.00
91.38 0.00
91.40 0.00
91.42 0.00
91.44 0.00
91.46 0.00
91.48 0.00
91.50 0.00
91.52 0.00
91.54 0.00
91.56 0.00
91.58 0.00
91.60 0.00
91.62 0.00
91.64 0.00
91.66 0.00
91.68 0.00
91.70 0.00
91.72 0.00
91.74 0.00
91.76 0.00
91.78 0.00
91.80 0.00
91.82 0.00
91.84 0.00
91.86 0.00
91.88 0.00
91.90 0.00
91.92 0.00
91.94 0.00
91.96 0.00
91.98 0.00
92.00 0.00
92.02 0.33
92.04 0.94
92.06 1.72
92.08 2.65
92.10 3.70
Elevation
feet)
Primary
cfs)
92.12 4.86
92.14 6.13
92.16 7.49
92.18 8.94
92.20 10.46
92.22 12.16
92.24 13.94
92.26 15.83
92.28 17.81
92.30 19.88
92.32 22.05
92.34 24.31
92.36 26.65
92.38 29.09
92.40 31.62
92.42 34.30
92.44 37.07
92.46 39.93
92.48 42.90
92.50 45.96
92.52 49.12
92.54 52.38
92.56 55.74
92.58 59.19
92.60 62.74
92.62 65.86
92.64 69.02
92.66 72.22
92.68 75.48
92.70 78.77
92.72 82.11
92.74 85.49
92.76 88.91
92.78 92.38
92.80 95.88
92.82 99.50
92.84 103.16
92.86 106.87
92.88 110.62
92.90 114.41
92.92 118.25
92.94 122.12
92.96 126.04
92.98 130.00
93.00 134.00
Type II 24-hr 10 yr Rainfall=5.52"Site ContractorY10A
Printed 2/12/2018PreparedbyAECOM
Page134HydroCAD® 10.00-16 s/n 04851 © 2015 HydroCAD Software Solutions LLC
Stage-Area-Storage for Pond 224P: 224
Elevation
feet)
Surface
sq-ft)
Storage
cubic-feet)
90.00 5,642 0
90.05 5,695 283
90.10 5,749 570
90.15 5,803 858
90.20 5,856 1,150
90.25 5,910 1,444
90.30 5,963 1,741
90.35 6,016 2,040
90.40 6,070 2,342
90.45 6,124 2,647
90.50 6,177 2,955
90.55 6,288 3,266
90.60 6,399 3,584
90.65 6,510 3,906
90.70 6,621 4,235
90.75 6,732 4,568
90.80 6,842 4,908
90.85 6,953 5,253
90.90 7,064 5,603
90.95 7,175 5,959
91.00 7,286 6,321
91.05 7,376 6,687
91.10 7,466 7,058
91.15 7,557 7,434
91.20 7,647 7,814
91.25 7,737 8,198
91.30 7,827 8,587
91.35 7,917 8,981
91.40 8,008 9,379
91.45 8,098 9,782
91.50 8,188 10,189
91.55 8,291 10,601
91.60 8,394 11,018
91.65 8,496 11,440
91.70 8,599 11,868
91.75 8,702 12,300
91.80 8,805 12,738
91.85 8,908 13,181
91.90 9,010 13,629
91.95 9,113 14,082
92.00 9,216 14,540
92.05 9,278 15,002
92.10 9,339 15,468
92.15 9,401 15,936
92.20 9,463 16,408
92.25 9,525 16,883
92.30 9,586 17,360
92.35 9,648 17,841
92.40 9,710 18,325
92.45 9,771 18,812
92.50 9,833 19,302
92.55 9,895 19,795
92.60 9,956 20,292
Elevation
feet)
Surface
sq-ft)
Storage
cubic-feet)
92.65 10,018 20,791
92.70 10,080 21,294
92.75 10,142 21,799
92.80 10,203 22,308
92.85 10,265 22,819
92.90 10,327 23,334
92.95 10,388 23,852
93.00 10,450 24,373
Atlantic Coast Pipeline Project
NC Contractor/Pipeline Yard ESC Plan – Hydraulic Calculations
02-12-2018
A3.2 Composite Curve Number Calculations
Atlantic Coast Pipeline Project
NC Contractor/Pipeline Yard ESC Plan – Hydraulic Calculations
02-12-2018
A3.3 Sediment Basin Calculations
Sediment Basin 221 w/Rock Dam
Designed by Cnelson
Checked by
Project Name PY10A
Project Number
Site Location City/Town) Fayettville
NW
Total Drainage Area acres) 24.59
Step 1.Determine Peak Flow,Q10 for the basin drainage area
Q10 cfs) 133
Source:Hydraflow Express Grading Phase Output File
Step 2.Determine any site limitation for the sediment pool elevation,emergency spillway or top of dam
Min.Pool Elevation ft) 91
Max.Pool Elevation ft) 93
Step 3.Determine basin volumes cf)
Compute min.volume required 3600 cu.ft per acre of distrubed area)
Specity Sediment cleanout level to be marked one half the design volume)
Disturbed acreage ac) 21.8
Min.Volume cu.ft) 78,480
Sediment cleanout elevation ft)
Step 4.Determine area and shape of basin:
Check length/width ratio should be 2:1 to 6:1)
Compute min.basin surface area 435 sq.ft/cf)
Min.Surface Area sq.ft) 57,855
Min.Surface Area @ Elev 180.2
Proposed Basin Design
Elevation
Surface
Area sf)
Incre.Vol
cu.ft.)Cum.Vol
91 29,222
91.5 51,128 20,088 20,088
92 54,024 26,288 46,376
92.5 56,935 27,740 74,115
93 59,864 29,200 103,315 WEIR
Basin Design Check
Surface Area 59,864 ok
Volume cf)103,315 ok
Weir Design
Q=CLH^1.5
C 2.8
H 0.97
L 50
Basin Id.
Sediment Basin 222 w/Rock Dam
Designed by C.PRADO
Checked by
Project Name PY10A
Project Number
Site Location City/Town) Fayettville
NW
Total Drainage Area acres) 5.33
Step 1.Determine Peak Flow,Q10 for the basin drainage area
Q10 cfs) 38.3
Source:Hydraflow Express Grading Phase Output File
Step 2.Determine any site limitation for the sediment pool elevation,emergency spillway or top of dam
Min.Pool Elevation ft) 90
Max.Pool Elevation ft) 94
Step 3.Determine basin volumes cf)
Compute min.volume required 3600 cu.ft per acre of distrubed area)
Specity Sediment cleanout level to be marked one half the design volume)
Disturbed acreage ac) 5.33
Min.Volume cu.ft) 19,188
Sediment cleanout elevation ft)
Step 4.Determine area and shape of basin:
Check length/width ratio should be 2:1 to 6:1)
Compute min.basin surface area 435 sq.ft/cf)
Min.Surface Area sq.ft) 16,661
Min.Surface Area @ Elev 90.1
Proposed Basin Design
Elevation
Surface Area
sf)
Incre.Vol
cu.ft.)Cum.Vol
90.5 4,842
91 18,475 5,829 5,829
91.5 19,525 9,500 15,329
92 27,321 11,712 27,041 WEIR
Basin Design Check
Surface Area 27,321 ok
Volume cf)27,041 ok
Weir Design
Q=CLH^1.5
C 2.8
H 0.42
L 50
Basin Id.
Sediment Basin 223 w/Rock Dam
Designed by Cnelson
Checked by
Project Name PY10A
Project Number
Site Location City/Town) Fayettville
NW
Total Drainage Area acres) 3.71
Step 1.Determine Peak Flow,Q10 for the basin drainage area
Q10 cfs) 28.9
Source:Hydraflow Express Grading Phase Output File
Step 2.Determine any site limitation for the sediment pool elevation,emergency spillway or top of dam
Min.Pool Elevation ft) 92
Max.Pool Elevation ft) 94
Step 3.Determine basin volumes cf)
Compute min.volume required 3600 cu.ft per acre of distrubed area)
Specity Sediment cleanout level to be marked one half the design volume)
Disturbed acreage ac) 3.71
Min.Volume cu.ft) 13,356
Sediment cleanout elevation ft)
Step 4.Determine area and shape of basin:
Check length/width ratio should be 2:1 to 6:1)
Compute min.basin surface area 435 sq.ft/cf)
Min.Surface Area sq.ft) 12,572
Min.Surface Area @ Elev 93.8
Proposed Basin Design
Elevation
Surface Area
sf)
Incre.Vol
cu.ft.)Cum.Vol
92 7,314
92.5 8,772 4,022 4,022
93 10,247 4,755 8,776
93.5 11,740 5,497 14,273
94 13,251 6,248 20,521 WEIR
Basin Design Check
Surface Area 13,251 ok
Volume cf)20,521 ok
Weir Design
Q=CLH^1.5
C 2.8
H 0.35
L 50
Basin Id.
Sediment Basin 224 w/Rock Dam
Designed by Cnelson
Checked by
Project Name PY10A
Project Number
Site Location City/Town) Fayettville
NW
Total Drainage Area acres) 3.19
Step 1.Determine Peak Flow,Q10 for the basin drainage area
Q10 cfs) 17.5
Source:Hydraflow Express Grading Phase Output File
Step 2.Determine any site limitation for the sediment pool elevation,emergency spillway or top of dam
Min.Pool Elevation ft) 90
Max.Pool Elevation ft) 92
Step 3.Determine basin volumes cf)
Compute min.volume required 3600 cu.ft per acre of distrubed area)
Specity Sediment cleanout level to be marked one half the design volume)
Disturbed acreage ac) 3.19
Min.Volume cu.ft) 11,484
Sediment cleanout elevation ft)
Step 4.Determine area and shape of basin:
Check length/width ratio should be 2:1 to 6:1)
Compute min.basin surface area 435 sq.ft/cf)
Min.Surface Area sq.ft) 7,613
Min.Surface Area @ Elev 91.1
Proposed Basin Design
Elevation
Surface Area
sf)
Incre.Vol
cu.ft.)Cum.Vol
90 5,642
90.5 6,177 2,955 2,955
91 7,286 3,366 6,321
91.5 8,188 3,869 10,189
92 9,216 8,251 18,440 WEIR
Basin Design Check
Surface Area 9,216 ok
Volume cf)18,440 ok
Weir Design
Q=CLH^1.5
C 2.8
H 0.25
L 50
Basin Id.
Atlantic Coast Pipeline Project
NC Contractor/Pipeline Yard ESC Plan – Hydraulic Calculations
02-12-2018
A3.4 Infiltration Basin Calculations
EROSION & SEDIMENT CONTROL PLAN
CUMBERLAND COUNTY, NORTH CAROLINA
ATLANTIC COAST PIPELINE PROJECT
PROJECT CONTACTS
OWNER/APPLICANT
CONSULTANT
ERM NC, INC.
LICENSE #F-1223
15720 BRIZHAM HILL AVENUE, SUITE 120
CHARLOTTE, NORTH CAROLINA 28277
SCOTT ROBINSON, PE
704-541-8345
[e-mail]
LOCATION MAP
1" = 2,000 FEET WHEN
PRINTED FULL SIZE
DOMINION ENERGY TRANSMISSION, INC.
5000 DOMINION BOULEVARD
GLEN ALLEN, VA 23060
PHONE: [phone]
EXISTING INFORMATION SOURCES
CONTOURS AND BASE MAP PROVIDED BY I3
CONSULTING, LLC WITH ADDITIONAL CONTOURS
OBTAINED FROM THE USGS NATIONAL ELEVATION
DATASET.
PLAN REPRODUCTION WARNING
THE PLANS HAVE BEEN CREATED ON 24"X36"
SHEETS FOR REDUCTIONS, REFER TO GRAPHIC
SCALE.
THE PLANS HAVE BEEN CREATED FOR FULL
COLOR PLOTTING, AND SET OF THE PLANS THAT
IS NOT PLOTTED IN FULL COLOR SHALL NOT BE
CONSIDERED ADEQUATE FOR CONSTRUCTION
PURPOSES.
WARNING*** INFORMATION MAY BE LOST IN
COPYING AND/OR GRAY SCALE PLOTTING.
NORTH CAROLINA
SHEETS 2-3
CONTRACTOR YARDS - CUMBERLAND COUNTY
SHEET INDEX
X/XX/201X
SHEET 1 - COVER SHEET
SHEET X - SHEET TITLE
MOST RECENT ISSUE OR REVISION DATE
MOST RECENT REVISION NUMBER
FILLED CIRCLE INDICATES DRAWING INCLUDED WITHIN THIS ISSUE
DRAWING INDEX LEGEND
02/12/2018
SHEET 3 - CUMBERLAND (CY SPR10-A) ESCP
SHEET 2 - CUMBERLAND (CY SPR10-A) AERIAL OVERVIEW
SHEET 5 - ESCP DETAILS
SHEET 4 - ESCP DETAILS
2
SHEET 6 - ESCP DETAILS
SHEET 7 - ESCP NOTES
02/12/20182
02/12/20182
02/12/20182
02/12/20182
02/12/20182
02/12/20182
GAGA
GA
GA
E
E
E
E
E
TS
GP
G 281
G
G
LM
PIEDMONT
LM
PIEDMONT
90
410045701
LAT:35°02'38.27"
LON:78°49'20.7146"
APPROX.
LOCATION
APPROX.
LOCATION
wcuc 051e
90
E Q U I P M E N T
LM
PIEDMONT
S09° 33' 45.90"E1326.907S82° 48'
15.42"W1195.159N08° 35' 40.
83"W789.
151N12° 47' 30.74"W671.599N66° 28'17
5 5
E 445.385
S75° 03'0
7
7
6
E 541.
718 GATE
POSTS
OVERHEAD ELECTRIC
LINEEUNDERGROUND
GAS LINEG
FENCE
xSTREAM DITCH PRIVACY
FENCE
UTILITY POLE
GP GUY POLE GUY
ANCHORGA UTILITY
VALVE POST LM LINE
MARKERTS
TEST STAND TBM TEMPORARY BENCH MARK
GRAVEL AREA.TOP SOIL
SEGREGATION AREA
WETLANDwcuc 051e
FUEL TANK AREA (25'
x
250')TRAILER (24' x
60')
GRAVEL AREA.STORAGE UNITS TOP
SOIL SEGREGATION AREA 1000 200 0 100 200 CUMBERLAND CUMBERLAND CONTRACTOR YARD AERIAL OVERVIEW 1.CONTOURS AND BASE MAP PROVIDED BY I3
ENGINEERING AND CONSULTING, LLC WITH ADDITIONAL CONTOURS OBTAINED
FROM THE USGS NATIONAL ELEVATION DATASET.THE CONTRACTOR IS RESPONSIBLE FOR VERIFYING ITS ACCURACY.2.DISCREPANCIES
FOUND IN THE PROJECT EXISTING CONDITIONS MUST BE REPORTED TO THE PROJECT ENGINEER/OWNER.3.NO GUARANTEE OR ASSURANCE IS GIVEN BY THE OWNER OR
ENGINEER AS TO THE ACCURACY, COMPLETENESS, OR VALIDITY OF THE EXISTING UTILITIES. CONTRACTOR TO PERFORM "CALL BEFORE YOU DIG"
TO COORDINATE WITH UTILITY COMPANIES, AND LOCATE AND IDENTIFY ALL UTILITIES PRIOR TO CONSTRUCTION.4.DOMINION RESERVES THE RIGHT TO USE EITHER, OR BOTH, 12" COMPOST FILTER
SOCK OR STANDARD SILT
FENCE, FOR ANY
APPLICATION IN
WHICH EITHER OF THESE TWO CONTROL MEASURES ARE SPECIFIED.ACCORD ROADUNNAMED TRIBUTARY TO
LOCKS CREEK GENERAL
NOTES
AND COMMENTS:SYM.
DATE
BY
REVISION INFORMATION
PROJECT/
TASK
APP.SEAL APP. FOR CONST.:SCALE:
APP. FOR BID:CHECKED:DRAWN:DIR/FILE:DISTRICT:TITLE:COUNTY:DWG.
NO.GROUP REV.STATE:
925
White Oaks Blvd. Bridgeport, West Virginia
26330 / 681-842-
8000 Atlantic Coast
Pipeline, LLC ERM 15720 Brixham Hill
Ave, Suite
120 License #F-
1223 ERMNC,
INC.Charlotte, NC 28277 (
704) 541-8345
AS
NOTED 02/12/2018WTS02/
12/2018NJB2-ACP\North
Carolina\ATLANTICCOASTPIPELINENC
ISSUED FOR REVIEWNJB03/
10/170 ISSUED
FOR REVIEWWTS08/04/
171
ISSUED
FOR REVIEWNJB02/
12/201822OF7 LIMITSOFDISTURBANCELIMITSOFCONSTRUCTIONUNNAMED PONDDOWNING
ROADNCSTA TEHI
G H W A Y 2 4
CLIN T
O N
R O
A
93 94
94 93
93929494939294
93
95
95
94
93
92
9291 93 93 92 91 90
9291939392919392
94
94 93 92
91
91
93
92
94
94
93
92
91
91
92
GAGA
GA
GA
E
E
E
E
E
TS
GP
G 281
G
G
LM
PIEDMONT
LM
PIEDMONT
90410045701
LAT:35°02'38.27"
LON:78°49'20.7146"
APPROX.
LOCATION
APPROX.
LOCATION
wcuc 051e
90
E Q U I P M E N T
TRAILERS
LM
PIEDMONT
G R A V E L
R O A D
S09° 33' 45.90"E1326.907S82° 48'
15.42"W1195.159N08° 35' 40.
83"W789.
151N12° 47' 30.74"W671.599N66° 28'175
5 E
445.
385 S75°
03' 0 7
7
6 E
541.71 8
GATE
POSTS
GRAVEL
PARKING LOT 12.
3
ACRES)
GRAVEL PARKING LOT
3.
2
ACRES)GRAVEL PARKING
LOT 3.2 ACRES)TOPSOIL SEGREGATION 2.9 ACRES)
TOPSOIL SEGREGATION 1.0 ACRES)STOR
A GE
U NI
T
S
FUEL
T A
N K
S
OVERHEAD ELECTRIC
LINEEUNDERGROUND
GAS LINEG
FENCE
xSTREAM DITCH PRIVACY
FENCE
UTILITY POLE
GP GUY POLE GUY
ANCHORGA UTILITY
VALVE POST LM LINE
MARKERTS
TEST STAND TBM TEMPORARY BENCH MARK
GRAVEL AREA.TOP SOIL
SEGREGATION AREA
WETLANDwcuc
051e FUEL TANK AREA (
25' x 250')TRAILER (24' x 60')STORAGE UNITS 1000 100 0 50 100 1.CONTOURS AND BASE MAP PROVIDED BY I3
ENGINEERING AND CONSULTING, LLC WITH ADDITIONAL CONTOURS OBTAINED
FROM THE USGS NATIONAL ELEVATION DATASET.THE CONTRACTOR IS RESPONSIBLE FOR VERIFYING ITS ACCURACY.2.DISCREPANCIES
FOUND IN THE PROJECT EXISTING CONDITIONS MUST BE REPORTED TO THE PROJECT ENGINEER/OWNER.3.NO GUARANTEE OR ASSURANCE IS GIVEN BY THE OWNER OR
ENGINEER AS TO THE ACCURACY, COMPLETENESS, OR VALIDITY OF THE EXISTING UTILITIES. CONTRACTOR TO PERFORM "CALL BEFORE YOU DIG"
TO COORDINATE WITH UTILITY COMPANIES, AND LOCATE AND IDENTIFY ALL UTILITIES PRIOR TO CONSTRUCTION.4.DOMINION RESERVES THE RIGHT TO USE EITHER, OR BOTH, 12" COMPOST FILTER
SOCK OR STANDARD SILT
FENCE,
FOR ANY APPLICATION IN
WHICH EITHER OF THESE TWO CONTROL MEASURES ARE
SPECIFIED.CUMBERLAND CUMBERLAND CONTRACTOR YARD
ESCP UNNAMED TRI B U T A R Y TO LOCKS CRE E
K GENERAL NOTES
AND
COMMENTS:SYM.DATE
BY
REVISION
INFORMATION PROJECT/
TASK
APP.
SEAL APP. FORCONST.:SCALE:APP.
FOR BID:CHECKED:DRAWN:DIR/FILE:DISTRICT:TITLE:COUNTY:DWG. NO.
GROUP REV.STATE:925
White
Oaks Blvd. Bridgeport, West Virginia 26330 /
681-842-8000
Atlantic Coast Pipeline,
LLC ERM 15720 Brixham Hill Ave,
Suite 120
License #F-1223
ERM NC, INC.
Charlotte, NC 28277 (704)
541-8345 AS
NOTED
02/12/2018WTS02/12/
2018NJB 2-ACP\NorthCarolina\
ATLANTIC COASTPIPELINENCISSUED
FOR REVIEWNJB03/10/
170 ISSUED FOR
REVIEWWTS08/04/171
ISSUED FOR REVIEWNJB02/
12/20182 3
OF 7 LIMITS
OF DISTURBANCE 35.1
ACRES)LIMITSOFCONSTRUCTION40.8 ACRES)PROPOSEDCOMPOSTFILTERSOCKORSILT FENCENC
S T A T E H I G
H W
A Y
2 4 DOWN
I
N G
R O
A D ACCORD
ROADFLOW ARROW ROCK
CONSTRUCTION ENTRANCE (
OR
APPROVED ALT.)OUTLET
PROTECTION PROPOSED
CULVERT PROPOSED DIVERSION
SWALE EX.
18" CULVERT ROCK
CONSTRUCTION ENTRANCE
REF. SHEET 4)
DIVERSION SWALE REF. SHEET
4)DIVERSION
SWALE REF. SHEET
4)DIVERSION SWALE REF.
SHEET 4)
PROP. (2) 18"
CULVERT OUTLET
PROTECTION
REF. SHEET 5)
PROP. (
2)
18"
CULVERT
OUTLET PROTECTION REF.
SHEET
5)
ROCK CONSTRUCTION ENTRANCE REF.
SHEET
4)UNNAMED POND
INFILTRATION
TRENCH
REF. SHEET 5)
INFILTRATION TRENCH
REF.
SHEET
5)
INFILTRATION
TRENCH
REF.
SHEET
5)
INFILTRATION TRENCH
REF. SHEET 5)
INFILTRATION TRENCH SEDIMENT
TRAP SEDIMENT
TRAP SEDIMENT TRAP
SEDIMENT TRAP COMPOST
FILTER SOCK
OR BSRF REF.
SHEET 4)COMPOST
FILTER SOCK
OR BSRF REF.
SHEET 4)COMPOST
FILTERSOCK
OR BSRF