21-6-20 Ft Bayard Hydrology Report 02.pdf
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- Y1LB--Resolicit - 885CM3011-Pave Roads w/option to Repair Water and Stormwater Utilities, Ft Bayard NC
- Solicitation number
- 36C78622B0002
About this file
This solicitation is for a construction project to pave roads and repair water and stormwater utilities at Fort Bayard National Cemetery in New Mexico. The Department of Veterans Affairs National Cemetery Administration seeks to resurface gravel roads with asphalt paving and make improvements to storm drains, water lines, and associated infrastructure. Offerors must submit pricing for the base scope of road paving and optional line items to repair utilities by July 15, 2021. The period of performance is 365 days from award. Small businesses, veteran-owned small businesses, service-disabled veteran-owned small businesses, and HUBZone small businesses will receive preference in evaluation.
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Preliminary Hydrology Report
Fort Bayard National Cemetery Site Improvements
Fort Bayard, NM
Project #885CM3011
Prepared for:
Department of Veterans Affairs
425 I Street NW, Washington, DC 20001
Prepared by:
Vali Cooper International, LLC (VCI)
18300 E. 71st Ave., Suite 130, Denver, CO 80249
T: 504-684-4408
6/4/2020
Fort Bayard, NM
Project #885CM3011 | 6/4/2020 Page 2
Table of contents
1.0 Introduction
2.0 Existing Conditions
3.0 Proposed Improvements
4.0 Area Runoff Totals
Appendices
Appendix A Drainage Basins
Appendix B Pre-Development Hydraulic Study
Appendix C Post-Development Hydraulic Study
Project #885CM3011 | 6/4/2020 Page 3
1.0 Introduction
This drainage analysis describes the existing site conditions and proposed site conditions from a stormwater perspective. This analysis will show the proposed site improvements compard to the existing site conditions. With no local requirement for storm water detention, the 100-year storm event was used to size the proposed drainage structures.
2.0 Existing Conditions
existing site is in south western New Mexico in Fort Bayard, NM. The existing site conditions consists of a developed cemetery. The cemetery currently has inground burials, columbarium niches, gravel roads, concrete sidewalks, and other impervious areas, administrative and maintenance buildings, and landscaped areas. Currently storm water is being handled via sheet flow to localized storm water facilities and is discharged off site. There is no storm water detention or retentions facilities located on site and has been divided into multiple sub basins for analysis. See appendix B for the Pre-Development hydraulic study.
3.0 Proposed Improvements
The proposed improvements consist of paving the gravel roads with impervious asphalt paving along with storm water facility improvements. All subbasins have been modified to reflect the post improvement conditions. Due to no regulations regarding storm water discharge, no detention facilities have been added to the site. See appendix C for the Post-Development Hydraulic Study
4.0 Area Runoff Totals
satisfactory condition, there were three distinct areas where their current condition may need to be addressed. Repair/Replacement recommendations and design for all storm water facilities shall be presented in later submittals Please see appendix A for Pre & Post-Development drainage basins.
Frequency Pre-Development Post-Development
2-Year 4.55 cfs 4.66 cfs
5-Year 8.19 cfs 8.33 cfs
10-Year 11.41 cfs 11.56 cfs
25-Year 16.23 cfs 16.40 cfs
100-Year 24.33 cfs 24.52 cfs
The stormwater runoff totals from this site was evaluated with HydroCAD Stormwater Modeling Software using the SCS TR-20 method.
Project #885CM3011 | 6/4/2020 Page 4
Appendix A
Drainage Basins
T i e t o
C e n t e r
C o r n e r o f
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A D
J O
I N
E R
S T
A T
E
O
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E W
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X
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O
(PARCEL NOT CODED)
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(PARCEL NOT CODED)
T n t r r n f
S c t i n
T i e
F r t
B a y a d
R s e t
U
S
G
B o n z e
D i s k
N
W
N
N
S 10°01'02" W
624.33'
(S 58°26'32" E 624.33')
S
E
N 10°01'02" E
624.00'
(N 58°26'32" W 624.00')
N 10°06'36" E 971.68'
(N 09°57' E 972.00')
S
E
S10°04'36"W
960.00' (S 09°55' W 960.00')
FLAGPOLE
BASE (TYP)
STEWART DRIVE
ROOSEVELT DRIVE
STEWART DRIVE
ROOSEVELT DRIVE
STEWART DRIVE
SHERMAN DRIVE
LEE DRIVE
GRANT
DRIVE
C A
M I N
O
D
E
P
A Z
SECTION F
SECTION B
SECTION E
SECTION D
SECTION A
SECTION C
SECTION M
SECTION G
CAMINO DE PAZ
ADMINISTRATIVE ROAD
UNNAMED
ROAD
LINCOLN DRIVE
BORE NO 6
BORE NO 5
BORE NO 1
BORE NO 2
BORE NO 14
BORE NO 13
BORE 16
BORE 15
BORE NO 4
BORE NO 3
BORE NO 8
BORE NO 7
BASIN 2
40649
2,014 road
BASIN 1
4560 road
BASIN 3
BASIN 4
32483
BASIN 5
22026
1030 raod
916 hard
BASIN 6
34597
1627 road
945 hard
BASIN 7
936 hard
BASIN 8
9235 road
BASIN 9
519 hard
BASIN 10
70857
7950 road
6961 hard
BASIN 11
24921
2313 road
4883 hard
BASIN 12
1486 road
5229 hard
BASIN 14
5957 road
BASIN 17
32273
11987 road
2254 conc
8514 hard
BASIN 16
2701 road
3505 hard
BASIN 15
2078 road
683 hard
BASIN 18
18001
6081 road
4198 conc
BASIN 19
741 road
598 hard
BASIN 20
1676 road
5415 hard
BASIN 21
20791
1898 road
431 conc
3704 hard
BASIN 22
18415
1557 road
408 conc
1440 hard
BASIN 23
11845
276 road
682 hard
BASIN 24
539 hard
BASIN 25
2788 hard
BASIN 26
1692 road
3292 hard
BASIN 27
18282
1332 road
6086 hard
BASIN 28
11810
1920 road
1112 conc
4100 hard
BASIN 29
1038 road
885 conc
1620 hard
BASIN 30
BASIN 31
1850 road
BASIN 32
BASIN 33
BASIN 34
BASIN 35
1780 road
2841 conc
BASIN 36
13597
BASIN 37
19269
BASIN 38
hardscape
BASIN 38
hardscape
BASIN 13
147848
19376 road
28934 hard
0 50 100
1 INCH = 50 FEET
EXISTING CONDITIONS
DRAINAGE BASINS
APPENDIX A
Project Number
Building Number
Drawing Number
Project Title
Location
Issue Date Checked Drawn
Drawing Title
Approved:
VA FORM 08 - 6231
A
BID DOCUMENTS
N/A
National Cemetery Administration
Design and Construction Service
U.S. Department of Veterans Affairs
B
C
D
E
F
A
B
C
D
E
F
21 4 5 6 7 8 9 10
PhaseARCHITECT/ENGINEER OF RECORD STAMPCONSULTANT
321 4 5 6 7 8 9 10
18300 East 71st Ave., Denver, CO, 80249 504.684.4408; Sean Fitzpatrick
FORT BAYARD NC - PAVE ROADS,
REPAIR STORM DRAINS & WATER
UTILITIES
Fort Bayard, NM
885CM3011
N/A Project Director
07/08/2021Revisions: Date:
Jani McCreary Department of Veterans Affairs, NCA
Phone: 202.236.4737 Email: jani.mccreary@va.gov Sheet of 2
BID DOCUMENTS
VCI Project Management Construction Management Engineering
LEGEND AND SYMBOLS
FLOW PATH
EXISTING DRAINAGE BASIN
EXISTING MINOR CONTOUR
EXISTING MAJOR CONTOUR
No. 44593
PROFESSIONAL
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7/08/2021
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REBAR POST
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CONCRETE
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WATER METER
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CONCRETE
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COLUMBARIUM
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SIGN
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OUTLET
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ASPHALT DRIVE
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CONCRETE/STONE WALL
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GATE
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COMMITTAL SHELTER
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STUCCO STORAGE BUILDING FFE 6182.77
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STUCCO PIC BUILDING FFE 6179.42
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CONCRETE CURB
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STUCO BUILDING FFE 6144.83
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ST-1 TOP BOX-6116.30 15"CPP IN-6114.05 15"RCP OUT-6113.90
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ST-2 TOP BOX-6118.80 15"CPP IN-6116.07 15"CPP OUT-6116.03
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ST-3 TOP BOX-6122.07 15"CPP IN-6118.57 15"CPP OUT-6118.50
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15"RCP (PARTIALLY BURIED) TOP PIPE-6113.69 TOP DIRT-6113.21
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ST-4 TOP BOX-6125.06 15"CPP IN-6121.65 15"CPP OUT-6121.88
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ST--5 TOP BOX-6128.06 15"CPP IN-6125.23 15"CPP OUT-6124.99
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ST-6 TOP BOX-6131.60 15"CPP OUT-6128.13
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2"PVC PIPES
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INV. 15"CMP 6131.55
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ST-18 STORM MH RIM-6166.93 15"CPP OUT-6160.90
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ST-7 TOP BOX-6134.50 15"CPP IN-6132.06 15"CPP OUT-6132.02
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INV.15"CMP 6158.66
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INV 15"CPP 6131.80
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KCI CONTROL POINT #15 SET 60D NAIL N:654119.51 E:2624128.00 ELEV:6140.08
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CONTROL POINT 12" BWC SMA CONTROL N:653511.14 E:2624045.47 ELEV:6134.03
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T e n t e r
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J O
I N
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T n t r n f c t i n
T i e
F r t
B a y a d
R s e t
U
S
G
B o n z e
D i s k
N
W
N
S 10°01'02" W
624.33'
(S 58°26'32" E 624.33')
S
E
N 10°01'02" E
624.00'
(N 58°26'32" W 624.00')
N 10°06'36" E 971.68'
(N 09°57' E 972.00')
S
E
S10°04'36"W
960.00' (S 09°55' W 960.00')
FLAGPOLE
BASE (TYP)
STEWART DRIVE
ROOSEVELT DRIVE
STEWART DRIVE
ROOSEVELT DRIVE
STEWART DRIVE
SHERMAN DRIVE
LEE DRIVE
GRANT
DRIVE
C A
M I N
O
D
E
P
A Z
SECTION F
SECTION B
SECTION E
SECTION D
SECTION A
SECTION C
SECTION M
SECTION G
CAMINO DE PAZ
ADMINISTRATIVE ROAD
UNNAMED
ROAD
LINCOLN DRIVE
BORE NO 6
BORE NO 5
BORE NO 1
BORE NO 2
BORE NO 14
BORE NO 13
BORE 16
BORE 15
BORE NO 4
BORE NO 3
BORE NO 8
BORE NO 7
BASIN 2
40649
2,014 road
BASIN 1
4560 road
BASIN 3
BASIN 4
32483
BASIN 5
22026
1030 raod
916 hard
BASIN 6
34597
1627 road
945 hard
BASIN 7
936 hard
BASIN 8
9235 road
BASIN 9
519 hard
BASIN 10
70857
7950 road
6961 hard
BASIN 11
24921
2313 road
4883 hard
BASIN 12
1486 road
5229 hard
BASIN 13.3
95924
1944 road
14632 hard
BASIN 14
5957 road
BASIN 17
32273
11987 road
2254 conc
8514 hard
BASIN 16
2701 road
3505 hard
BASIN 15
2078 road
683 hard
BASIN 18
18001
6081 road
4198 conc
BASIN 19
741 road
598 hard
BASIN 20
1676 road
5415 hard
BASIN 21
20791
1898 road
431 conc
3704 hard
BASIN 22
18415
1557 road
408 conc
1440 hard
BASIN 23
11845
276 road
682 hard
BASIN 24
539 hard
BASIN 25
2788 hard
BASIN 26
1692 road
3292 hard
BASIN 27
18282
1332 road
6086 hard
BASIN 28
11810
1920 road
1112 conc
4100 hard
BASIN 29
1038 road
885 conc
1620 hard
BASIN 30
BASIN 31
1850 road
BASIN 32
BASIN 33
BASIN 34
BASIN 35
1780 road
2841 conc
BASIN 36
13597
BASIN 37
19269
BASIN 38
hardscape
BASIN 38
hardscape
BASIN 13.1
1913 road
791 hard
BASIN 13.2
19875
9306 road
7476 hard
BASIN 13.4
31898
6213 road
6034 hard
0 50 100
1 INCH = 50 FEET
POST IMPROVEMENTS
DRAINAGE BASINS
APPENDIX A
Project Number
Building Number
Drawing Number
Project Title
Location
Issue Date Checked Drawn
Drawing Title
Approved:
VA FORM 08 - 6231
A
N/A
National Cemetery Administration
Design and Construction Service
U.S. Department of Veterans Affairs
B
C
D
E
F
A
B
C
D
E
F
21 4 5 6 7 8 9 10
PhaseARCHITECT/ENGINEER OF RECORD STAMPCONSULTANT
321 4 5 6 7 8 9 10
18300 East 71st Ave., Denver, CO, 80249 504.684.4408; Sean Fitzpatrick
FORT BAYARD NC - PAVE ROADS,
REPAIR STORM DRAINS & WATER
UTILITIES
Fort Bayard, NM
885CM3011
N/A Project Director
Revisions: Date:
Jani McCreary Department of Veterans Affairs, NCA
Phone: 202.236.4737 Email: jani.mccreary@va.gov Sheet of 2
VCI Project Management Construction Management Engineering
LEGEND AND SYMBOLS
FLOW PATH
EXISTING DRAINAGE BASIN
EXISTING MINOR CONTOUR
EXISTING MAJOR CONTOUR
BID DOCUMENTS
07/08/2021
BID DOCUMENTS
No. 44593
PROFESSIONAL
R
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G
I S
TE
R
E
D
J
O
R
D
A
D
VA
N
D
E
R
M
E
E
R
E
N
G
IN
E
E
R
7/08/2021
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KCI CONTROL POINT #12 SET 60D NAIL N:654718.35 E:2624580.33 ELEV:6172.88
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COMMITTAL SHELTER
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STUCCO STORAGE BUILDING FFE 6182.77
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STUCCO PIC BUILDING FFE 6179.42
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CONCRETE CURB
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STUCO BUILDING FFE 6144.83
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NEW SECTION MARKER BASE
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ST-1 TOP BOX-6116.30 15"CPP IN-6114.05 15"RCP OUT-6113.90
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ST-2 TOP BOX-6118.80 15"CPP IN-6116.07 15"CPP OUT-6116.03
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ST-3 TOP BOX-6122.07 15"CPP IN-6118.57 15"CPP OUT-6118.50
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15"RCP (PARTIALLY BURIED) TOP PIPE-6113.69 TOP DIRT-6113.21
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ST-4 TOP BOX-6125.06 15"CPP IN-6121.65 15"CPP OUT-6121.88
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ST--5 TOP BOX-6128.06 15"CPP IN-6125.23 15"CPP OUT-6124.99
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ST-6 TOP BOX-6131.60 15"CPP OUT-6128.13
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2"PVC PIPES
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INV. 15"CMP 6131.55
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ST-18 STORM MH RIM-6166.93 15"CPP OUT-6160.90
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ST-7 TOP BOX-6134.50 15"CPP IN-6132.06 15"CPP OUT-6132.02
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INV.15"CMP 6158.66
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INV.15"CMP 6163.71
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INV.15"CMP 6164.80
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ST-12 TOP BOX-6152.25 15"CPP IN-6149.43 15"CPP OUT-6149.30
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INV.15"CMP PARTIALLY BURIED-6156.17 TOP OF DIRT-6157.50
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ST-11 TOP BOX-6150.25 15"CPP IN-6147.64
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ST-13 TOP BOX-6155.00 15"CPP IN-6151.09 15"CPP OUT-6151.04
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ST-17 TOP BOX-6164.76 15"CPP IN-6160.16 15"CPP OUT-6160.09
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ST-24 TOP BOX-6162.33 15"CPP IN-6159.00 15"CPP OUT-6158.82
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ST-25 TOP BOX-6167.60 15"CPP IN-6164.04 15"CPP OUT-6164.06
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ST-27 TOP BOX-6176.68 15"CPP OUT-6172.88
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ST-19 TOP BOX-6154.00 15"CPP IN-6150.96 15"CPP OUT-6150.94
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INV.15"CMP 6167.40
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INV.15"CMP 6175.82
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ST-8 TOP BOX-6135.75 15"CPP IN-6133.44 15"CPP OUT-6133.31
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ST-9 TOP BOX-6137.90 15"CPP IN-6134.36 15"CPP OUT-6134.38
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ST-10 STORM MH RIM-6139.63 15"CPP IN-6134.25 15"CPP OUT-6134.02
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INV 15"CPP 6131.80
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INV 15"CMP 6145.50
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ST-28 15"CPP IN-6168.47 15"CPP OUT-6168.37
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INV. 15"CMP 6132.15
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GRATE OVER OPEN 15"CMP
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6"PVC
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KCI CONTROL POINT #15 SET 60D NAIL N:654119.51 E:2624128.00 ELEV:6140.08
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KCI CONTROL POINT #10 SET 60D NAIL N:654971.41 E:2624443.14 ELEV:6175.78
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ST-11 TOP BOX-6150.25 15"CPP IN-6146.69
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GRATE OVER OPEN 15"CMP
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12" TRENCH DRAIN
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80160 FD ALUM CAP N:654083.76 E:2624155.78 ELEV:6141.33
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MOW CURB
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CONTROL POINT 12" BWC SMA CONTROL N:653511.14 E:2624045.47 ELEV:6134.03
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Project #885CM3011 | 6/4/2020 Page 5
Appendix B
Pre-Development Hydraulic Study
1S
Basin #1
4S
Basin #2 5S
Basin #3
6S
Basin #4
7S
Basin #5
8S
Basin #6
9S
Basin #7
10S
Basin #9
11S
Basin #8
12S
Basin #10
13S
Basin #11
14S
Basin #12
15S
Basin #13
16S
Basin #14
17S
Basin #15
18S
Basin #16
19S
Basin #17
20S
Basin #18
21S
Basin #19
22S
Basin #20
23S
Basin #21
24S
Basin #22
25S
Basin #23
26S
Basin #24
27S
Basin #25
28S
Basin #26
29S
Basin #27
30S
Basin #28
31S
Basin #29
32S
Basin #30
33S
Basin #31
34S
Basin #32
35S
Basin #33
36S
Basin #34
37S
Basin #35
38S
Basin #36
39S
Basin #37
40S
Basin #38
41P
CB
ST-1
42P
CB
ST-2
43P
CB
ST-3
44P
CB
ST-4
45P
CB
ST-5
46P
CB
ST-6
48P
CB
ST-7
49P
CB
ST-8
50P
CB
ST-9
51P
CB
ST-10
52P
CB
ST-11
53P
CB
ST-12
54P
CB
ST-13
55P
CB
ST-14
56P
CB
ST-15
57P
CB
ST-16
58P
CB
ST-17
59P
CB
ST-18
60P
CB
ST-19
61P
CB
ST-20
62P
CB
ST-21
63P
CB
ST-22
64P
CB
ST-23
65P
CB
ST-24
66P
CB
ST-25
67P
CB
ST-26
68P
CB
ST-27
69P
CB
ST-28
3L
Bypass
47L
PRE
Routing Diagram for Fort Bayard-885CM3011 Pre Development Prepared by Vali Cooper International, LLC, Printed 12/21/2020
HydroCAD® 10.10-4b s/n 11580 © 2020 HydroCAD Software Solutions LLC
Subcat Reach Pond Link
Fort Bayard-885CM3011 Pre Development Printed 12/21/2020Prepared by Vali Cooper International, LLC
Page 2HydroCAD® 10.10-4b s/n 11580 © 2020 HydroCAD Software Solutions LLC
Rainfall Events Listing (selected events)
Event# Event
Name
Storm Type Curve Mode Duration
(hours)
B/B Depth
(inches)
AMC
1 100-year Type II 24-hr Default 24.00 1 3.79 2
Type II 24-hr 100-year Rainfall=3.79"Fort Bayard-885CM3011 Pre Development
Page 3HydroCAD® 10.10-4b s/n 11580 © 2020 HydroCAD Software Solutions LLC
Summary for Subcatchment 1S: Basin #1
[49] Hint: Tc<2dt may require smaller dt
Runoff = 0.79 cfs @ 11.89 hrs, Volume= 0.037 af, Depth> 2.44"
Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-24.00 hrs, dt= 0.10 hrs
Type II 24-hr 100-year Rainfall=3.79"
Area (sf) CN Description
3,294 74 >75% Grass cover, Good, HSG C
4,560 96 Gravel surface, HSG D
7,854 87 Weighted Average
7,854 100.00% Pervious Area
Tc Length Slope Velocity Capacity Description
(min) (feet) (ft/ft) (ft/sec) (cfs)
0.5 50 0.0800 1.57 Sheet Flow, Smooth surfaces n= 0.011 P2= 1.81"
0.9 215 0.0650 4.10 Shallow Concentrated Flow, Unpaved Kv= 16.1 fps
1.4 265 Total
Subcatchment 1S: Basin #1
Runoff
Hydrograph
Time (hours) 2423222120191817161514131211109876543210
F lo w
(c fs
0.85
0.8
0.75
0.7
0.65
0.6
0.55
0.5
0.45
0.4
0.35
0.3
0.25
0.2
0.15
0.1
0.05
Type II 24-hr
100-year Rainfall=3.79"
Runoff Area=7,854 sf
Runoff Volume=0.037 af
Runoff Depth>2.44"
Flow Length=265'
Tc=1.4 min
CN=87
0.79 cfs
Page 4HydroCAD® 10.10-4b s/n 11580 © 2020 HydroCAD Software Solutions LLC
Summary for Subcatchment 4S: Basin #2
Runoff = 1.37 cfs @ 12.21 hrs, Volume= 0.122 af, Depth> 1.50"
Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-24.00 hrs, dt= 0.10 hrs
Type II 24-hr 100-year Rainfall=3.79"
Area (sf) CN Description
40,649 74 >75% Grass cover, Good, HSG C
2,014 96 Gravel surface, HSG D
42,663 75 Weighted Average
42,663 100.00% Pervious Area
Tc Length Slope Velocity Capacity Description
(min) (feet) (ft/ft) (ft/sec) (cfs)
25.0 255 0.0650 0.17 Sheet Flow, Grass: Dense n= 0.240 P2= 1.81"
0.5 80 0.0250 2.55 Shallow Concentrated Flow, Unpaved Kv= 16.1 fps
25.5 335 Total
Subcatchment 4S: Basin #2
Runoff
Hydrograph
Time (hours) 2423222120191817161514131211109876543210
F
Type II 24-hr
100-year Rainfall=3.79"
Runoff Area=42,663 sf
Runoff Volume=0.122 af
Runoff Depth>1.50"
Flow Length=335'
Tc=25.5 min
CN=75
1.37 cfs
Page 5HydroCAD® 10.10-4b s/n 11580 © 2020 HydroCAD Software Solutions LLC
Summary for Subcatchment 5S: Basin #3
[49] Hint: Tc<2dt may require smaller dt
Runoff = 0.84 cfs @ 11.93 hrs, Volume= 0.052 af, Depth> 3.55"
Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-24.00 hrs, dt= 0.10 hrs
Type II 24-hr 100-year Rainfall=3.79"
Area (sf) CN Description
7,644 98 Unconnected pavement, HSG D
7,644 100.00% Impervious Area
7,644 100.00% Unconnected
Tc Length Slope Velocity Capacity Description
(min) (feet) (ft/ft) (ft/sec) (cfs)
4.5 550 0.0100 2.03 Shallow Concentrated Flow, Paved Kv= 20.3 fps
Subcatchment 5S: Basin #3
Runoff
Hydrograph
Time (hours) 2423222120191817161514131211109876543210
F
0.9
0.85
0.8
0.75
0.7
0.65
0.6
0.55
0.5
0.45
0.4
0.35
0.3
0.25
0.2
0.15
0.1
0.05
Type II 24-hr
100-year Rainfall=3.79"
Runoff Area=7,644 sf
Runoff Volume=0.052 af
Runoff Depth>3.55"
Flow Length=550'
Slope=0.0100 '/'
Tc=4.5 min
CN=98
0.84 cfs
Page 6HydroCAD® 10.10-4b s/n 11580 © 2020 HydroCAD Software Solutions LLC
Summary for Subcatchment 6S: Basin #4
Runoff = 0.98 cfs @ 12.27 hrs, Volume= 0.098 af, Depth> 1.50"
Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-24.00 hrs, dt= 0.10 hrs
Type II 24-hr 100-year Rainfall=3.79"
Area (sf) CN Description
32,483 74 >75% Grass cover, Good, HSG C
1,876 96 Gravel surface, HSG D
34,359 75 Weighted Average
34,359 100.00% Pervious Area
Tc Length Slope Velocity Capacity Description
(min) (feet) (ft/ft) (ft/sec) (cfs)
29.8 291 0.0550 0.16 Sheet Flow, Grass: Dense n= 0.240 P2= 1.81"
0.5 80 0.0250 2.55 Shallow Concentrated Flow, Unpaved Kv= 16.1 fps
30.3 371 Total
Subcatchment 6S: Basin #4
Runoff
Hydrograph
Time (hours) 2423222120191817161514131211109876543210
F
Type II 24-hr
100-year Rainfall=3.79"
Runoff Area=34,359 sf
Runoff Volume=0.098 af
Runoff Depth>1.50"
Flow Length=371'
Tc=30.3 min
0.98 cfs
Page 7HydroCAD® 10.10-4b s/n 11580 © 2020 HydroCAD Software Solutions LLC
Summary for Subcatchment 7S: Basin #5
Runoff = 0.67 cfs @ 12.28 hrs, Volume= 0.069 af, Depth> 1.50"
Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-24.00 hrs, dt= 0.10 hrs
Type II 24-hr 100-year Rainfall=3.79"
Area (sf) CN Description
22,026 74 >75% Grass cover, Good, HSG C
1,030 96 Gravel surface, HSG D
* 916 85 zero scape
23,972 75 Weighted Average
23,972 100.00% Pervious Area
Tc Length Slope Velocity Capacity Description
(min) (feet) (ft/ft) (ft/sec) (cfs)
31.0 280 0.0460 0.15 Sheet Flow, Grass: Dense n= 0.240 P2= 1.81"
0.6 85 0.0250 2.55 Shallow Concentrated Flow, Unpaved Kv= 16.1 fps
31.6 365 Total
Subcatchment 7S: Basin #5
Runoff
Hydrograph
Time (hours) 2423222120191817161514131211109876543210
F
0.7
0.65
0.6
0.55
0.5
0.45
0.4
0.35
0.3
0.25
0.2
0.15
0.1
0.05
Type II 24-hr
100-year Rainfall=3.79"
Runoff Area=23,972 sf
Runoff Volume=0.069 af
Runoff Depth>1.50"
Flow Length=365'
Tc=31.6 min
0.67 cfs
Page 8HydroCAD® 10.10-4b s/n 11580 © 2020 HydroCAD Software Solutions LLC
Summary for Subcatchment 8S: Basin #6
Runoff = 1.75 cfs @ 12.32 hrs, Volume= 0.192 af, Depth> 1.50"
Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-24.00 hrs, dt= 0.10 hrs
Type II 24-hr 100-year Rainfall=3.79"
Area (sf) CN Description
64,597 74 >75% Grass cover, Good, HSG C
1,627 96 Gravel surface, HSG D
* 945 85 zero scape
67,169 75 Weighted Average
67,169 100.00% Pervious Area
Tc Length Slope Velocity Capacity Description
(min) (feet) (ft/ft) (ft/sec) (cfs)
34.6 300 0.0400 0.14 Sheet Flow, Grass: Dense n= 0.240 P2= 1.81"
0.3 52 0.0400 3.22 Shallow Concentrated Flow, Unpaved Kv= 16.1 fps
34.9 352 Total
Subcatchment 8S: Basin #6
Runoff
Hydrograph
Time (hours) 2423222120191817161514131211109876543210
F
Type II 24-hr
100-year Rainfall=3.79"
Runoff Area=67,169 sf
Runoff Volume=0.192 af
Runoff Depth>1.50"
Flow Length=352'
Slope=0.0400 '/'
Tc=34.9 min
1.75 cfs
Page 9HydroCAD® 10.10-4b s/n 11580 © 2020 HydroCAD Software Solutions LLC
Summary for Subcatchment 9S: Basin #7
Runoff = 0.31 cfs @ 12.15 hrs, Volume= 0.025 af, Depth> 1.50"
Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-24.00 hrs, dt= 0.10 hrs
Type II 24-hr 100-year Rainfall=3.79"
Area (sf) CN Description
7,728 74 >75% Grass cover, Good, HSG C
* 936 85 zero scape
8,664 75 Weighted Average
8,664 100.00% Pervious Area
Tc Length Slope Velocity Capacity Description
(min) (feet) (ft/ft) (ft/sec) (cfs)
20.7 176 0.0500 0.14 Sheet Flow, Grass: Dense n= 0.240 P2= 1.81"
0.1 10 0.0400 3.22 Shallow Concentrated Flow, Unpaved Kv= 16.1 fps
20.8 186 Total
Subcatchment 9S: Basin #7
Runoff
Hydrograph
Time (hours) 2423222120191817161514131211109876543210
F
0.34
0.32
0.3
0.28
0.26
0.24
0.22
0.2
0.18
0.16
0.14
0.12
0.1
0.08
0.06
0.04
0.02
Type II 24-hr
100-year Rainfall=3.79"
Runoff Area=8,664 sf
Runoff Volume=0.025 af
Runoff Depth>1.50"
Flow Length=186'
Tc=20.8 min
0.31 cfs
Page 10HydroCAD® 10.10-4b s/n 11580 © 2020 HydroCAD Software Solutions LLC
Summary for Subcatchment 10S: Basin #9
[49] Hint: Tc<2dt may require smaller dt
Runoff = 0.08 cfs @ 11.99 hrs, Volume= 0.004 af, Depth> 1.72"
Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-24.00 hrs, dt= 0.10 hrs
Type II 24-hr 100-year Rainfall=3.79"
Area (sf) CN Description
766 74 >75% Grass cover, Good, HSG C
* 519 85 zero scape
1,285 78 Weighted Average
1,285 100.00% Pervious Area
Tc Length Slope Velocity Capacity Description
(min) (feet) (ft/ft) (ft/sec) (cfs)
7.8 55 0.0550 0.12 Sheet Flow, Grass: Dense n= 0.240 P2= 1.81"
0.1 10 0.0400 3.22 Shallow Concentrated Flow, Unpaved Kv= 16.1 fps
7.9 65 Total
Subcatchment 10S: Basin #9
Runoff
Hydrograph
Time (hours) 2423222120191817161514131211109876543210
F
0.085
0.08
0.075
0.07
0.065
0.06
0.055
0.05
0.045
0.04
0.035
0.03
0.025
0.02
0.015
0.01
0.005
Type II 24-hr
100-year Rainfall=3.79"
Runoff Area=1,285 sf
Runoff Volume=0.004 af
Runoff Depth>1.72"
Flow Length=65'
Tc=7.9 min
CN=78
0.08 cfs
Page 11HydroCAD® 10.10-4b s/n 11580 © 2020 HydroCAD Software Solutions LLC
Summary for Subcatchment 11S: Basin #8
[49] Hint: Tc<2dt may require smaller dt
Runoff = 1.21 cfs @ 11.90 hrs, Volume= 0.061 af, Depth> 2.91"
Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-24.00 hrs, dt= 0.10 hrs
Type II 24-hr 100-year Rainfall=3.79"
Area (sf) CN Description
1,758 74 >75% Grass cover, Good, HSG C
9,235 96 Gravel surface, HSG D
10,993 92 Weighted Average
10,993 100.00% Pervious Area
Tc Length Slope Velocity Capacity Description
(min) (feet) (ft/ft) (ft/sec) (cfs)
2.5 230 0.0350 1.53 Sheet Flow, Smooth surfaces n= 0.011 P2= 1.81"
Subcatchment 11S: Basin #8
Runoff
Hydrograph
Time (hours) 2423222120191817161514131211109876543210
F
Type II 24-hr
100-year Rainfall=3.79"
Runoff Area=10,993 sf
Runoff Volume=0.061 af
Runoff Depth>2.91"
Flow Length=230'
Slope=0.0350 '/'
Tc=2.5 min
CN=92
1.21 cfs
Page 12HydroCAD® 10.10-4b s/n 11580 © 2020 HydroCAD Software Solutions LLC
Summary for Subcatchment 12S: Basin #10
Runoff = 2.50 cfs @ 12.31 hrs, Volume= 0.268 af, Depth> 1.63"
Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-24.00 hrs, dt= 0.10 hrs
Type II 24-hr 100-year Rainfall=3.79"
Area (sf) CN Description
70,857 74 >75% Grass cover, Good, HSG C
7,950 96 Gravel surface, HSG D
* 6,961 85 zero scape
85,768 77 Weighted Average
85,768 100.00% Pervious Area
Tc Length Slope Velocity Capacity Description
(min) (feet) (ft/ft) (ft/sec) (cfs)
33.0 300 0.0450 0.15 Sheet Flow, Grass: Dense n= 0.240 P2= 1.81"
1.4 260 0.0350 3.01 Shallow Concentrated Flow, Unpaved Kv= 16.1 fps
34.4 560 Total
Subcatchment 12S: Basin #10
Runoff
Hydrograph
Time (hours) 2423222120191817161514131211109876543210
F
Type II 24-hr
100-year Rainfall=3.79"
Runoff Area=85,768 sf
Runoff Volume=0.268 af
Runoff Depth>1.63"
Flow Length=560'
Tc=34.4 min
CN=77
2.50 cfs
Page 13HydroCAD® 10.10-4b s/n 11580 © 2020 HydroCAD Software Solutions LLC
Summary for Subcatchment 13S: Basin #11
Runoff = 0.90 cfs @ 12.34 hrs, Volume= 0.100 af, Depth> 1.63"
Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-24.00 hrs, dt= 0.10 hrs
Type II 24-hr 100-year Rainfall=3.79"
Area (sf) CN Description
24,921 74 >75% Grass cover, Good, HSG C
2,313 96 Gravel surface, HSG D
* 4,883 85 zero scape
32,117 77 Weighted Average
32,117 100.00% Pervious Area
Tc Length Slope Velocity Capacity Description
(min) (feet) (ft/ft) (ft/sec) (cfs)
36.1 300 0.0360 0.14 Sheet Flow, Grass: Dense n= 0.240 P2= 1.81"
0.6 125 0.0400 3.22 Shallow Concentrated Flow, Unpaved Kv= 16.1 fps
36.7 425 Total
Subcatchment 13S: Basin #11
Runoff
Hydrograph
Time (hours) 2423222120191817161514131211109876543210
F
Type II 24-hr
100-year Rainfall=3.79"
Runoff Area=32,117 sf
Runoff Volume=0.100 af
Runoff Depth>1.63"
Flow Length=425'
Tc=36.7 min
0.90 cfs
Page 14HydroCAD® 10.10-4b s/n 11580 © 2020 HydroCAD Software Solutions LLC
Summary for Subcatchment 14S: Basin #12
Runoff = 0.47 cfs @ 12.15 hrs, Volume= 0.038 af, Depth> 2.09"
Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-24.00 hrs, dt= 0.10 hrs
Type II 24-hr 100-year Rainfall=3.79"
Area (sf) CN Description
2,880 74 >75% Grass cover, Good, HSG C
1,486 96 Gravel surface, HSG D
* 5,229 85 zero scape
9,595 83 Weighted Average
9,595 100.00% Pervious Area
Tc Length Slope Velocity Capacity Description
(min) (feet) (ft/ft) (ft/sec) (cfs)
12.6 95 0.0500 0.13 Sheet Flow, Grass: Dense n= 0.240 P2= 1.81"
9.1 37 0.0500 0.07 Sheet Flow, Grass: Bermuda n= 0.410 P2= 1.81"
0.4 60 0.0300 2.79 Shallow Concentrated Flow, Unpaved Kv= 16.1 fps
22.1 192 Total
Subcatchment 14S: Basin #12
Runoff
Hydrograph
Time (hours) 2423222120191817161514131211109876543210
F
0.52 0.5
0.48 0.46 0.44 0.42 0.4
0.38 0.36 0.34 0.32 0.3
0.28 0.26 0.24 0.22 0.2
0.18 0.16 0.14 0.12 0.1
0.08 0.06 0.04 0.02
Type II 24-hr
100-year Rainfall=3.79"
Runoff Area=9,595 sf
Runoff Volume=0.038 af
Runoff Depth>2.09"
Flow Length=192'
Tc=22.1 min
CN=83
0.47 cfs
Page 15HydroCAD® 10.10-4b s/n 11580 © 2020 HydroCAD Software Solutions LLC
Summary for Subcatchment 15S: Basin #13
Runoff = 6.15 cfs @ 12.30 hrs, Volume= 0.640 af, Depth> 1.71"
Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-24.00 hrs, dt= 0.10 hrs
Type II 24-hr 100-year Rainfall=3.79"
Area (sf) CN Description
147,848 74 >75% Grass cover, Good, HSG C
19,376 96 Gravel surface, HSG D
* 28,934 85 zero scape
196,158 78 Weighted Average
196,158 100.00% Pervious Area
Tc Length Slope Velocity Capacity Description
(min) (feet) (ft/ft) (ft/sec) (cfs)
30.9 300 0.0530 0.16 Sheet Flow, Grass: Dense n= 0.240 P2= 1.81"
0.7 130 0.0400 3.00 Shallow Concentrated Flow, Grassed Waterway Kv= 15.0 fps
1.4 215 0.0250 2.55 Shallow Concentrated Flow, Unpaved Kv= 16.1 fps
33.0 645 Total
Subcatchment 15S: Basin #13
Runoff
Hydrograph
Time (hours) 2423222120191817161514131211109876543210
F
Type II 24-hr
100-year Rainfall=3.79"
Runoff Area=196,158 sf
Runoff Volume=0.640 af
Runoff Depth>1.71"
Flow Length=645'
Tc=33.0 min
6.15 cfs
Page 16HydroCAD® 10.10-4b s/n 11580 © 2020 HydroCAD Software Solutions LLC
Summary for Subcatchment 16S: Basin #14
[49] Hint: Tc<2dt may require smaller dt
Runoff = 0.77 cfs @ 11.91 hrs, Volume= 0.042 af, Depth> 3.22"
Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-24.00 hrs, dt= 0.10 hrs
Type II 24-hr 100-year Rainfall=3.79"
Area (sf) CN Description
857 86 <50% Grass cover, Poor, HSG C
5,957 96 Gravel surface, HSG D
6,814 95 Weighted Average
6,814 100.00% Pervious Area
Tc Length Slope Velocity Capacity Description
(min) (feet) (ft/ft) (ft/sec) (cfs)
2.4 188 0.0250 1.28 Sheet Flow, Smooth surfaces n= 0.011 P2= 1.81"
0.7 105 0.0250 2.55 Shallow Concentrated Flow, Unpaved Kv= 16.1 fps
3.1 293 Total
Subcatchment 16S: Basin #14
Runoff
Hydrograph
Time (hours) 2423222120191817161514131211109876543210
F
0.85
0.8
0.75
0.7
0.65
0.6
0.55
0.5
0.45
0.4
0.35
0.3
0.25
0.2
0.15
0.1
0.05
Type II 24-hr
100-year Rainfall=3.79"
Runoff Area=6,814 sf
Runoff Volume=0.042 af
Runoff Depth>3.22"
Flow Length=293'
Slope=0.0250 '/'
Tc=3.1 min
CN=95
0.77 cfs
Page 17HydroCAD® 10.10-4b s/n 11580 © 2020 HydroCAD Software Solutions LLC
Summary for Subcatchment 17S: Basin #15
Runoff = 0.19 cfs @ 12.16 hrs, Volume= 0.016 af, Depth> 2.80"
Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-24.00 hrs, dt= 0.10 hrs
Type II 24-hr 100-year Rainfall=3.79"
Area (sf) CN Description
306 74 >75% Grass cover, Good, HSG C
2,078 96 Gravel surface, HSG D
* 683 85 zero scape
3,067 91 Weighted Average
3,067 100.00% Pervious Area
Tc Length Slope Velocity Capacity Description
(min) (feet) (ft/ft) (ft/sec) (cfs)
22.9 185 0.0430 0.13 Sheet Flow, Grass: Dense n= 0.240 P2= 1.81"
Subcatchment 17S: Basin #15
Runoff
Hydrograph
Time (hours) 2423222120191817161514131211109876543210
F
0.21
0.2
0.19
0.18
0.17
0.16
0.15
0.14
0.13
0.12
0.11
0.1
0.09
0.08
0.07
0.06
0.05
0.04
0.03
0.02
0.01
Type II 24-hr
100-year Rainfall=3.79"
Runoff Area=3,067 sf
Runoff Volume=0.016 af
Runoff Depth>2.80"
Flow Length=185'
Slope=0.0430 '/'
Tc=22.9 min
CN=91
0.19 cfs
Page 18HydroCAD® 10.10-4b s/n 11580 © 2020 HydroCAD Software Solutions LLC
Summary for Subcatchment 18S: Basin #16
Runoff = 0.64 cfs @ 12.18 hrs, Volume= 0.054 af, Depth> 1.94"
Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-24.00 hrs, dt= 0.10 hrs
Type II 24-hr 100-year Rainfall=3.79"
Area (sf) CN Description
8,270 74 >75% Grass cover, Good, HSG C
2,701 96 Gravel surface, HSG D
* 3,505 85 zero scape
14,476 81 Weighted Average
14,476 100.00% Pervious Area
Tc Length Slope Velocity Capacity Description
(min) (feet) (ft/ft) (ft/sec) (cfs)
22.9 185 0.0430 0.13 Sheet Flow, Grass: Dense n= 0.240 P2= 1.81"
0.5 85 0.0350 3.01 Shallow Concentrated Flow, Unpaved Kv= 16.1 fps
23.4 270 Total
Subcatchment 18S: Basin #16
Runoff
Hydrograph
Time (hours) 2423222120191817161514131211109876543210
F
0.7
0.65
0.6
0.55
0.5
0.45
0.4
0.35
0.3
0.25
0.2
0.15
0.1
0.05
Type II 24-hr
100-year Rainfall=3.79"
Runoff Area=14,476 sf
Runoff Volume=0.054 af
Runoff Depth>1.94"
Flow Length=270'
Tc=23.4 min
CN=81
0.64 cfs
Page 19HydroCAD® 10.10-4b s/n 11580 © 2020 HydroCAD Software Solutions LLC
Summary for Subcatchment 19S: Basin #17
Runoff = 1.99 cfs @ 12.29 hrs, Volume= 0.203 af, Depth> 1.93"
Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-24.00 hrs, dt= 0.10 hrs
Type II 24-hr 100-year Rainfall=3.79"
Area (sf) CN Description
32,273 74 >75% Grass cover, Good, HSG C
11,987 96 Gravel surface, HSG D
* 8,514 85 zero scape
* 2,254 98 Concrete Sidewalk
55,028 81 Weighted Average
52,774 95.90% Pervious Area
2,254 4.10% Impervious Area
Tc Length Slope Velocity Capacity Description
(min) (feet) (ft/ft) (ft/sec) (cfs)
32.3 275 0.0400 0.14 Sheet Flow, Grass: Dense n= 0.240 P2= 1.81"
0.3 60 0.0500 3.60 Shallow Concentrated Flow, Unpaved Kv= 16.1 fps
32.6 335 Total
Subcatchment 19S: Basin #17
Runoff
Hydrograph
Time (hours) 2423222120191817161514131211109876543210
F
Type II 24-hr
100-year Rainfall=3.79"
Runoff Area=55,028 sf
Runoff Volume=0.203 af
Runoff Depth>1.93"
Flow Length=335'
Tc=32.6 min
1.99 cfs
Page 20HydroCAD® 10.10-4b s/n 11580 © 2020 HydroCAD Software Solutions LLC
Summary for Subcatchment 20S: Basin #18
Runoff = 1.66 cfs @ 12.07 hrs, Volume= 0.109 af, Depth> 2.02"
Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-24.00 hrs, dt= 0.10 hrs
Type II 24-hr 100-year Rainfall=3.79"
Area (sf) CN Description
18,001 74 >75% Grass cover, Good, HSG C
6,081 96 Gravel surface, HSG D
* 4,198 98 Concrete Sidewalk
28,280 82 Weighted Average
24,082 85.16% Pervious Area
4,198 14.84% Impervious Area
Tc Length Slope Velocity Capacity Description
(min) (feet) (ft/ft) (ft/sec) (cfs)
13.7 115 0.0600 0.14 Sheet Flow, Grass: Dense n= 0.240 P2= 1.81"
0.3 55 0.0350 3.01 Shallow Concentrated Flow, Unpaved Kv= 16.1 fps
14.0 170 Total
Subcatchment 20S: Basin #18
Runoff
Hydrograph
Time (hours) 2423222120191817161514131211109876543210
F
Type II 24-hr
100-year Rainfall=3.79"
Runoff Area=28,280 sf
Runoff Volume=0.109 af
Runoff Depth>2.02"
Flow Length=170'
Tc=14.0 min
CN=82
1.66 cfs
Page 21HydroCAD® 10.10-4b s/n 11580 © 2020 HydroCAD Software Solutions LLC
Summary for Subcatchment 21S: Basin #19
[49] Hint: Tc<2dt may require smaller dt
Runoff = 0.15 cfs @ 11.89 hrs, Volume= 0.007 af, Depth> 2.82"
Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-24.00 hrs, dt= 0.10 hrs
Type II 24-hr 100-year Rainfall=3.79"
Area (sf) CN Description
741 96 Gravel surface, HSG D
* 598 85 zero scape
1,339 91 Weighted Average
1,339 100.00% Pervious Area
Tc Length Slope Velocity Capacity Description
(min) (feet) (ft/ft) (ft/sec) (cfs)
0.7 60 0.0500 1.35 Sheet Flow, Smooth surfaces n= 0.011 P2= 1.81"
0.2 40 0.0400 3.22 Shallow Concentrated Flow, Unpaved Kv= 16.1 fps
0.9 100 Total
Subcatchment 21S: Basin #19
Runoff
Hydrograph
Time (hours) 2423222120191817161514131211109876543210
F
0.17
0.16
0.15
0.14
0.13
0.12
0.11
0.1
0.09
0.08
0.07
0.06
0.05
0.04
0.03
0.02
0.01
Type II 24-hr
100-year Rainfall=3.79"
Runoff Area=1,339 sf
Runoff Volume=0.007 af
Runoff Depth>2.82"
Flow Length=100'
Tc=0.9 min
CN=91
0.15 cfs
Page 22HydroCAD® 10.10-4b s/n 11580 © 2020 HydroCAD Software Solutions LLC
Summary for Subcatchment 22S: Basin #20
Runoff = 0.69 cfs @ 12.14 hrs, Volume= 0.054 af, Depth> 1.94"
Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-24.00 hrs, dt= 0.10 hrs
Type II 24-hr 100-year Rainfall=3.79"
Area (sf) CN Description
7,530 74 >75% Grass cover, Good, HSG C
1,676 96 Gravel surface, HSG D
* 5,415 85 zero scape
14,621 81 Weighted Average
14,621 100.00% Pervious Area
Tc Length Slope Velocity Capacity Description
(min) (feet) (ft/ft) (ft/sec) (cfs)
20.6 175 0.0500 0.14 Sheet Flow, Grass: Dense n= 0.240 P2= 1.81"
0.2 50 0.0300 3.52 Shallow Concentrated Flow, Paved Kv= 20.3 fps
20.8 225 Total
Subcatchment 22S: Basin #20
Runoff
Hydrograph
Time (hours) 2423222120191817161514131211109876543210
F
0.75
0.7
0.65
0.6
0.55
0.5
0.45
0.4
0.35
0.3
0.25
0.2
0.15
0.1
0.05
Type II 24-hr
100-year Rainfall=3.79"
Runoff Area=14,621 sf
Runoff Volume=0.054 af
Runoff Depth>1.94"
Flow Length=225'
Tc=20.8 min
0.69 cfs
Page 23HydroCAD® 10.10-4b s/n 11580 © 2020 HydroCAD Software Solutions LLC
Summary for Subcatchment 23S: Basin #21
Runoff = 0.83 cfs @ 12.27 hrs, Volume= 0.084 af, Depth> 1.64"
Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-24.00 hrs, dt= 0.10 hrs
Type II 24-hr 100-year Rainfall=3.79"
Area (sf) CN Description
20,791 74 >75% Grass cover, Good, HSG C
1,898 96 Gravel surface, HSG D
* 3,704 85 zero scape
* 431 98 concrete
26,824 77 Weighted Average
26,393 98.39% Pervious Area
431 1.61% Impervious Area
Tc Length Slope Velocity Capacity Description
(min) (feet) (ft/ft) (ft/sec) (cfs)
30.9 300 0.0530 0.16 Sheet Flow, Grass: Dense n= 0.240 P2= 1.81"
0.3 40 0.0200 2.28 Shallow Concentrated Flow, Unpaved Kv= 16.1 fps
31.2 340 Total
Subcatchment 23S: Basin #21
Runoff
Hydrograph
Time (hours) 2423222120191817161514131211109876543210
F
0.9
0.85
0.8
0.75
0.7
0.65
0.6
0.55
0.5
0.45
0.4
0.35
0.3
0.25
0.2
0.15
0.1
0.05
Type II 24-hr
100-year Rainfall=3.79"
Runoff Area=26,824 sf
Runoff Volume=0.084 af
Runoff Depth>1.64"
Flow Length=340'
Tc=31.2 min
0.83 cfs
Page 24HydroCAD® 10.10-4b s/n 11580 © 2020 HydroCAD Software Solutions LLC
Summary for Subcatchment 24S: Basin #22
Runoff = 0.69 cfs @ 12.26 hrs, Volume= 0.068 af, Depth> 1.64"
Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-24.00 hrs, dt= 0.10 hrs
Type II 24-hr 100-year Rainfall=3.79"
Area (sf) CN Description
18,415 74 >75% Grass cover, Good, HSG C
1,557 96 Gravel surface, HSG D
* 1,440 85 zero scape
* 408 98 concrete
21,820 77 Weighted Average
21,412 98.13% Pervious Area
408 1.87% Impervious Area
Tc Length Slope Velocity Capacity Description
(min) (feet) (ft/ft) (ft/sec) (cfs)
29.8 278 0.0500 0.16 Sheet Flow, Grass: Dense n= 0.240 P2= 1.81"
0.4 72 0.0400 3.22 Shallow Concentrated Flow, Unpaved Kv= 16.1 fps
30.2 350 Total
Subcatchment 24S: Basin #22
Runoff
Hydrograph
Time (hours) 2423222120191817161514131211109876543210
F
0.75
0.7
0.65
0.6
0.55
0.5
0.45
0.4
0.35
0.3
0.25
0.2
0.15
0.1
0.05
Type II 24-hr
100-year Rainfall=3.79"
Runoff Area=21,820 sf
Runoff Volume=0.068 af
Runoff Depth>1.64"
Flow Length=350'
Tc=30.2 min
0.69 cfs
Page 25HydroCAD® 10.10-4b s/n 11580 © 2020 HydroCAD Software Solutions LLC
Summary for Subcatchment 25S: Basin #23
Runoff = 0.36 cfs @ 12.28 hrs, Volume= 0.037 af, Depth> 1.50"
Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-24.00 hrs, dt= 0.10 hrs
Type II 24-hr 100-year Rainfall=3.79"
Area (sf) CN Description
11,845 74 >75% Grass cover, Good, HSG C
276 96 Gravel surface, HSG D
* 682 85 zero scape
12,803 75 Weighted Average
12,803 100.00% Pervious Area
Tc Length Slope Velocity Capacity Description
(min) (feet) (ft/ft) (ft/sec) (cfs)
30.7 274 0.0450 0.15 Sheet Flow, Grass: Dense n= 0.240 P2= 1.81"
0.3 49 0.0400 3.22 Shallow Concentrated Flow, Unpaved Kv= 16.1 fps
31.0 323 Total
Subcatchment 25S: Basin #23
Runoff
Hydrograph
Time (hours) 2423222120191817161514131211109876543210
F
0.4
0.38
0.36
0.34
0.32
0.3
0.28
0.26
0.24
0.22
0.2
0.18
0.16
0.14
0.12
0.1
0.08
0.06
0.04
0.02
Type II 24-hr
100-year Rainfall=3.79"
Runoff Area=12,803 sf
Runoff Volume=0.037 af
Runoff Depth>1.50"
Flow Length=323'
Tc=31.0 min
0.36 cfs
Page 26HydroCAD® 10.10-4b s/n 11580 © 2020 HydroCAD Software Solutions LLC
Summary for Subcatchment 26S: Basin #24
Runoff = 0.31 cfs @ 12.15 hrs, Volume= 0.025 af, Depth> 1.50"
Runoff by SCS TR-20 method, UH=SCS,…
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