SW1230501_Design Calculations_20230612

STORMWATER/DrETENTION FACILITIES
(STORMTiECH CHAMBER SYSTEM)
CALCULATION MANUAL
VERNER CHILD CARE
NORTH LOUI'SIANA AVENUE
BUNCOMBE COUNTY, NORTH CAROLINA
ON& a&
L)avis CivilSolutions, rA
March 2020
19161

TABLE OF CONIE'NTS
1
NARRATIVE
2
SUMMARY OF FLOWS FOR DETENTION
3-4
SYSTEM 1: 1-YR STORM PRE -DEVELOPMENT RUNOFF
5-6
SYSTEM 1: 1-YR STORM POST -DEVELOPMENT RUNOFF
7-13
SYSTEM 1: 1-YR STORM DETENTIONIINDICATING DISCHARGE BELOW PRE-DEV RATE
14-15
SYSTEM 1: 10-YR STORM PRE -DEVELOPMENT RUNOFF
16-17
SYSTEM 1: 10-YR STORM POST -DEVELOPMENT RUNOFF
18-24
SYSTEM 1: 10-YR STORM DETENTION INDICATING DISCHARGE BELOW PRE-DEV RATE
25-26
SYSTEM, 1: 25-YR STORM PRE -DEVELOPMENT RUNOFF
27-28
SYSTEM 1': 25-YR STORM POST -DEVELOPMENT RUNOFF
29-35
SYSTEM 1: 25-YR STORM DETENTION INDICATING DISCHARGE BELOW PRE-DEV RATE
36-37
SYSTEM 2: 1-YR STORM PRE -DEVELOPMENT RUNOFF
38-39
SYSTEM 2: 1-YR STORM POST -DEVELOPMENT RUNOFF
40-46
SYSTEM 2: 1-YR STORM DETENTION IINDICATING DISCHARGE BELOW PRE-DEV RATE
47-48
SYSTEM 2: 10-YR STORM PRE -DEVELOPMENT RUNOFF
49-50
SYSTEM 2: 10-YR STORM POST -DEVELOPMENT RUNOFF
51-57
SYSTEM 2: 10-YR STORM DETENTION INDICATING DISCHARGE BELOW PRE-DEV RATE
58-59
SYSTEM 2: 25-YR STORM PRE -DEVELOPMENT RUNOFF
60-61
SYSTEM 2: 25-YR STORM POST -DEVELOPMENT RUNOFF
62-68
SYSTEM 2: 25-YR STORM DETENTION INDICATING DISCHARGE BELOW PRE-DEV RATE
69-70
BYPASS, 1-YR STORM PRE -DEVELOPMENT RUNOFF
71-72
BYPASS, 1-YR STORM POST -DEVELOPMENT RUNOFF
73-74
BYPASS, 10-YR STORM PRE -DEVELOPMENT RUNOFF
75-76
BYPASS, 10-YR STORM POST -DEVELOPMENT RUNOFF
77-78
BYPASS, 25-YR STORM PRE -DEVELOPMENT RUNOFF
79-80
BYPASS, 25-YR STORM POST -DEVELOPMENT RUNOFF
81-82
OPERATION & MAINTENANCE PLAN
83
STORM WATER DRAINAGE PIPE FLOW CHART
84-85
NOAA RAINFALL DATA (INTENSITY, INIHR)
Project 19161

NARRATIVE
STORM WATER/DETENTION
(STORMTECH CHAMBER SYSTEM)
North Louisiana Avenue
Buncombe County, North Carolina
This project is located on North Louisiana Avenue in north Buncombe County, North Carolina
adjacent to and north of the campus of Emma Elementary School on approximately 6.11 acres of
land. The subject project generally consists of the construction of an approximately 11.500
square Moot day care facility, along with associated parking areas playground areas. The work
includes grading and installation of water, aevver, and storm drainage utilities, paved parking and
entrance drives, and artificial turf playground areas.
8homn water faoN#ea include curb inlets drop in|ats, junction boxes, and connecting piping.
These faoUdUem have been designed for the 25'year storm event. Storm water detention is
provided utilizing two (2) OkonmTeoh below -ground detention feoi|ities, each with inlet diversion
and outlet control structures with orifice and weirs capable ofcontrolling the post -construction
runoff for the 1-year. 18'yeor.end25-yearstormmventabvn*duoimgthonebsofruoofftothepre-
cVmatruotiom rates. Water quality is provided utilizing the detention systems for storage tocontrol
the runoff from the 1-year storm event with a restricted orifice that will detain the runoff for an
extended period.
Aoumnnary of the pre+conetruotion, poat-onnstrmction, and detained flows for the regulated design

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Verner Child Care 1, I-yr Storm (Pre-Const) Rainfall Duration=5 min, Inten=3.95inlhr
Prepared by Davis CivilSolutions, PA Printed 3/13/2020
HydroCAD@10.10-3a sin 03655 @2020 HydroCAD Software Solutions LLC Page 1
Summary for Subcatchment 1S: Runoff
Verner Child Care 1, 1-yr. Storm Event (Pre -Construction)
Runoff = 2.56 cfs @ 0.08 hrs, Volurne= 796cf, Depth= 0.13"
Runoff by Rational method, Rise/Fall=1.0/1.0 xTc, Time Span= 0.00-3,00 hrs, dt= 0.01 hrs
Rainfall Duration=5 min, Inten=3.95 in/hr
Area (ac) C Description
0,440
0.25
Woodlands
1.020
0.40
Playground, Sparse Grass
0.250
0.60
Bare Packed Soil, Smooth
1.710
0.39
Weighted Average
1.710
100.00% Pervious Area
Tc Length Slope Velocity Capacity Description
(min) (feet) (ft/ft) (ft/sec) (cfs)
5.0 Direct Entry,
ca
0
LL
Time (hours)
Id

Verner Child Care 1, 1-yr Storm (Pre-Const) Rainfall Durafion=5 min, Inten=3.95 in1hr
Prepared by Davis CivilSolutions, PA Printed 3/13/2020
HydroCADO 10.10-3a s/n 03655 @ 2020 Hy,droCAD Software Solutions LLC Pa2
Time Runoff
(hours) (cfs)
0.00 0,00
0.02 0.64
0,04 1,27
0.06 1.91
0.08 2.55
0.10 2,12
0.12 1.49
0.14 0.85
0.16 0.21
0.18 0.00
0.20 0.00
0,22 0,00
0.24 0.00
026 0.00
0.28 0,00
0.30 0,00
0.32 0.00
0.34 0,00
0.36 0.00
0.38 0.00
0.40 OM
0.42 0.00
0.44 0.00
0.46 0.00
0.48 0.00
0.50 0.00
0.52 0.00
0.54 0.00
0,56 0.00
0.58 0.00
0.60 0.00
0.62 0.00
0.64 0.00
0,66 0.00
0.68 0.010
0.70 0.00
0.72 0.00
0.74 0.00
0.76 0.00
0.78 0.00
0.80 0.00
0.82 0.00
0.84 0,00
0.86 0.00
0.88 0,00
0.90 0.00
0.92 0.00
0,94 0.00
0.96 0.00
0.98 0.00
1.00 0.00
1.02 0.00
Hydrogiraph for Subcatchment 1S: Runoff
Time Runoff
(hours) (cfs)
1,04 0.00
1.06 0.00
1.08 0,00
1.10 0.00
1.12 0.00
1,14 0,00
1.16 0.00
1 A 8 0.00
1,20 0.00
1.22 0.00
1.24 0.00
1,26 0,00
1.28 0.00
1.30 0.00
1,32 0,00
1,34 0.00
1.36 0.00
1.38 0.00
1.40 MO
1.42 0.00
1.44 0.00
1.46 0,00
1.48 0.00
1.50 0.00
1.52 0.00
1.54 0.00
1.56 0.00
1.58 0.00
1.60 0.00
1.62 0.00
1.64 0.00
1.66 0.00
1.68 0.00
1.70 0.00
1.72 0.00
1.74 0.00
1.76 0.00
1.78 0.00
1.80 0.00
1.82 0.00
1.84 0.00
1.86 0.00
1,88 0,00
1.90 0.00
1.92 0.00
1.94 0.00
1.96 0.00
1.98 0.00
2.00 0.00
2.02 0.00
2.04 0.00
2.06 0.00
Time Runoff
(hours)
(cfs)
2.08
0.00
2.10
0.00
2.12
0.00
2.14
0.00
2.16
0.00
2.18
0.00
2.20
0.00
2.22
0.00
2.24
0.00
2.26
0.00
2.28
0.00
2.30
0.00
2.32
0.00
2.34
0.00
2.36
0.00
2.38
0.00
2.40
0.00
2,42
01.00
2,44
0.00
2.46
0.00
2.48
0.00
2.50
0.00
2.52
0.00
2,54
0.00
2.56
0,00
2.58
0.00
2.60
0,00
2.62
0,00
2.64
0.00
2.66
0,00
2.68
0,00
2.70
0.00
2.72
0,00
2.74
0,00
2.76
0.00
2.78
0,00
2.80
0,00
2.82
0.00
2.84
0.00
2.86
0.00
2.88
0.00
2.90
0.00
2.92
0.00
2.94
0.00
2,96
0.00
2.98
0.00
3.00
0.00
H

Verner Child Care 1, 1-yr Storm (Post-Const) Rainfall Durafion=5 min, Inten=3.95 in1hr
Prepared by Davis CivilSolutions, PA Printed 3/13/2020
HydroCAD@10.10-3a sin 03655 @2020 HydroCAD Software Solutions LLC Page 1
Summary for Subcatchment IS: Runoff
Verner Child Care 1, 1-yr Storm {Post -Construction)
Runoff 5.39 cfs @ 0.08 hrs, Volume= 0.038 af, Depth= 0.27"
Runoff by Rational method, Rise/Fall=1.0/1.0 xTc, Time Span= 0.00-50.00 hrs, dt= 0.01 hrs
Rainfall Duration=5 min, Inten=3.95 in/hr
Area (act C. Description
0.140
0.20
Lawns, Maintained
0,400
0.80
Turf
1J70
0.90
Rooftop, Pavement
1.710
0.82
Weighted Average
1.710
100.00% Pervious Area
Tc Length Slope Velocity Capacity Description
(min) (feet) (ft/ft) (ft/sec) (cfs)
5.0 220 073 Direct Entry, Tc Entered Directly
0-1-
0 '1'6 '12' 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 '4' 50
Time (hours)
12

Verner Child Care 1, I-yr Storm (Post-Const) Rainfall Duration=5 min, Inten=3.95 in✓hr
Prepared by Davis CivilSolutions, PA Printed 3/13/2020
HydroCAD(010.10-3a sin 03655 @2020 HydroCAD Software Solutions LLC Page 2
Time Runoff
{hours) WS)
0.00 0.00
0.50 0.00
1.00 0.00
1.50 MO
2.00 0.00
2.50 0,00
3.00 0.00
3.60 0.00
4.00 0.00
4.50 0.00
5.00 0.00
5.50 0.00
6.00 0.00
6.50 0.00
7.00 0.00
7.50 0.00
8.00 0.00
8,50 0.00
9,00 0.00
9.50 OM
10,00 0.00
10.50 0.00
11.00 0.00
11.50 0.00
12.00 0.00
12.50 MO
13.00 MO
13.50 0.00
14.00 0.00
14.50 0,00
15.00 0.00
15.50 0.00
16.00 0.00,
16.50 0.00
17.00 0.00
17.50 0,00
18.00 0.00
18.50 0.00
19,00 0.00
19,50 0.00
20.00 0.00
20.50 0.00
21.00 0.00
21.50 0,00
22.00 0.00
22.50 0.00
23.00 0.00
23,50 0.00
24.00 0.00
24.50 0.00
25.00 0.00
25.50 0.00
Hydrograph for Subcatchment 1 S: Runoff
Time Runoff
(hours) (cfs)
26.00 0,00
26.50 MO
27.00 0.00
27.50 0.00
28.00 0,00
28.50 0.00
29.00 0.00
29,50 0.00
30.00 0.00
30.50 0,00
31.00 0.00
31.50 0.00
32.00 0.00
32.50 0,00
33.00 0.00
33.50 0,00
34,00 0,00
34,50 0.00
35.00 0.00
35.50 OM
36,00 MO
36.50 UO
37,00 0,00
37.50 0.00
38.00 0.00
38.50 0.00
39.00 0.00
39.50 0.00
40.00 0.00
40.50 0.00
41.00 0.00
41.50 0.00
42.00 0.00
42.50 0.00
43,00 0.00
43.50 0.00
44.00 0.00
44,50 0.00
45.00 0.00
45.50 0,00
46,00 0,00
46.50 0.00
47.00 0.00
47.50 0.00
48.00 0.00
4&50 0.00
49.00 0.00
49.50 0.00
50,00 0.00
0

Verner Child Care 1, 1 -yr Storm (Post-Const) Rainfall Duration=5 min, Inten=3.95 jn1hr
Prepared by Davis CivilSolutions, PA Printed 3/13/2020
Hy4roCAD@10.10-3a s/n03655 @2020 HydroCAD Software Solutions LLC Page 3
Summary for Pond 1 P: StormTech
StormTech Detention Facility
Inflow Area = 1.710 ac, 0.00% Impervious. Inflow Depth = 0.27"
Inflow 5.39 cfs @ 0.08 hrs, Volume= 0M8 of
Outflow 0.08 cfs @ 0.17 hrs, Volume= 0.038 af, Atten= 99%, Lag= 5.3 m,in
Primary 0.08 cfs @ 0.17 hrs, Volume= 0.038 of
Routing by Stor-Ind method, Time Span= 0.00-50.00 hrs, dt= 0.01 hrs
Peak Elev= 1.76' @ 0.17 hrs Surf.Area= 1,458 sf Storage= 1,642 cf
Plug -Flow detention time= 225.2 min calculated for 0.038 of (100% of inflow)
Center -of -Mass det. time= 225,0 min ( 230.0 - 5.0 )
Volume Invert AvaiI.Storage Storage Description
#1A 0.00, 2,103 cf 29.92'W x 48.72'L x 5.50'H Field A
8,016 cf Overall - 2,758 cf Embedded = 5,258 cf x 40.0% Voids
#2A 0.75' 2,758 cf ADS StormTech MC-3500 d +Cap x 24 Inside #1
Effective Size= 70.4"W x 45,0"H => 15.33 sf x 7.171 = 110.0 cf
Overall Size= 77.0"W x 45.0"H x 7,501 with, 0.33'Overlap
24 Chambers in 4 Rows
Cap Storage= + 14.9 cf x 2 x 4 rows = 119.2 cf
4,861 cf Total Available Storage
Storage Group A created with Chamber Wizard
Device Routing Invert Outlet Devices
#1 Primary 0.00' 18.0" Vert. Orifice/Grate C= 0.600 Limited to weir flow at low heads
#2 Device 1 0,00' 1.5" Vert. Orifice/Grate C= 0.600 Limited to weir flow at low heads
#3 Device 1 2.00' 10.0" Vert. Orifice/Grate C= 0.600 Limited to weir flow at low heads
#4 Device 1 3.00' 3.0' long Sharp -Crested Rectangular Weir 2 End Contraction(s)
05 Crest Height
Primary OutFlow Max=0.08 cfs @ 0.17 hrs HW=1.76' (Free Discharge)
't-rOrif i ce/G rate (Passes 0,08 cfs of 8.55 cfs potential flow)
A-2=Orifice/Grate (Orifice Controls 0.08 cfs @ 6.27 fps)
-3=Orifice/Grate ( Controls 0,00 cfs)
-4=Sharp-Crested Rectangular Weir ( Controls 0.00 cfs)
M,

Verner Child Care 1, 1-yr Storm (Post-Const) Rainfall Duration=5 min, Inten=3.95 in1hr
Prepared by Davis CivilSolutions, PA Printed 3/13/2020
HydroCAD@10.10-3a s/n03655 @2020 HydroCAD Software Solutions LLC Pa 4
Pond 1 P: StormTech - Chamber Wizard Field A
Chamber Model = ADS—StormTech MC-3500 d +Cap (ADS StormTech@ MC-3500 d rev 03/14 with Cap
volume)
Effective Size= 70,4"W x 45.0"H => 15.33 sf x 7.1 TL = 110.0 cf
Overall Size= 77.0"W x 45.0"H x 7.501 with 0.33'Overlap
Cap Storage= +14,9 of x 2 x 4 rows = 119.2 cf
77,0" Wide + 9.0" Spacing = 86.0" C-C Row Spacing
6 Chambers/Row x 7.17' Long +1.85' Cap Length x 2 = 46,72' Row Length +12.0" End Stone x 2 = 48.72'
Base Length
4 Rows x 77.0" Wide + 9.0" Spacing x 3 + 12.0" Side Stone x 2 = 29.92' Base Width
9,0" Stone Base + 45.0" Chamber Height + 12.0" Stone Cover = 5.50'Fie,ld Height
24 Chambers x 110.0 cf + 14.9 of Cap Volume x 2 x 4 Rows = 2,758.0 cf Chamber Storage
8,016,5 cf Field - 2,758.0 cf Chambers = 5,258.4 cf Stone x 40.0% Voids = 2,103A cf Stone Storage
Chamber Storage + Stone Storage =: 4,861.4 cf = 0.112 of
Overall Storage Efficiency = 60.6%
Overall System Size = 48.72'x 29.92'x 5.50'
24 Chambers
296.9 cy Field
194.8 cy Stone

Verner Child Care 1, 1 -yr Storm (Post-Const) Rainfall Durafion=5 min, Inten=3,95in1hr
Prepared by Davis CivilSolutions, PA Printed 3/13/2020
HydroCAD@10,10-3a s/n03655 @2020 HydroCAD Software Solutions LLC Page 5
U
yU
LL
Pond 1 P: StormTech
Hydrograph
Time (hours)
Pond I P: StormTech
Stage -Discharge
5-
4-
I'M
3
W
2-
:7'
0-�
0 2 4 6 8 10 12 14 1 6 18
Discharge (cfs)
Inflpw
L79 Primary
tl�] Primary
4�'

Verner Child Care 1, I-yr Storm (Post-Const) Rainfall Duration=5 min, Inten=3.95 in1hr
Prepared by Davis CivilSolutions, PA Printed 3/13/2020
HydroCADO 10. 1 0-3a s/n 03655 @ 2020 Hy_droQAD Software Solutions LLC PaQe-6
Pond 1P: StormTech
Stage -Area -Storage
Storage (cubic -feet)
IE

Verner Child Care 1, 1-yr Storm (Post-Const) Rainfall Duration=5 min, Inten=3.95 in1hr
Prepared by Davis CivilSolutions, PA Printed 3/13/2020
HydroCADO 10.10-3a s/n 03655 @ 2020 HydroCAD Software Solutions LLC Pa 7
Hydro,graph for Pond 1P: StormTech
Time
Inflow
Storage
Elevation
Primary
(hours)
(cfs)
(cubic -feet)
(feet)
(cfs)
0.00
0.00
0
0.00
0.00
1.00
0.00
1,418
1.57
0.07
2.00
0.00
1,167
1.36
0.07
3.00
0.00
934
1.16
0.06
4.00
0,00
721
0,98
0.06
5.00
0.00
526
0.82
0.05
6.00
0.00
352
0.60
0.04
7.00
UO
215
0.37
0.03
8.00
0.00
117
0.20
0.02
9.00
0.00
58
0.10
0,01
10.00
0,00
32
0,06
0.00
11 1.00
0,00
20
0,03
0.00
12.00
0.00
13
0.02
OM
13.00
0.00
8
0,01
UO
14.00
0.00
5
0.01
0.00
15.00
0.00
3
0.01
0.00
16.00
0,00
2
0,00
0.00
17,00
0,00
1
0.00
0.00
18.00
0.00
1
0.00
0,00
19.00
0.00
0
0.00
0,00
20.00
0.00
0
0.00
0.00
21.00
0.00
0
UO
0,00
22.00
0.00
0
0.00
0.00
23.00
0.00
0
0.00
0.00
24.00
0.00
0
OM
0.00
25.00
0.00
0
0.00
0.00
26.00
0.00
0
0.00
0.00
27.00
0.00
0
0.00
UO
28.00
0.00
0
0.00
0,00
29.00
MO
0
0.00
0.00
30.00
OM
0
0.00
0.00
31.00
0.00
0
0.00
0.00
32.00
0.00
0
0.00
0.00
33.00
0.00
0
OM
0.00
34.00
0.00
0
0.00
0.00
35.00,
0.00
0
0.00
0.00
36.00
0.00
0
0.00
0.00
37.00
0.00
0
0.00
0.00
38.00
0.00
0
0.00
0.00
39,00
0.00
0
0.00
0,00
40.00
0.00
0
0.00
0.00
41,00
0,00
0
MO
0.00
42.0,0
0.00
0
MO
0,00
43.00
0.00
0
0,00
0.00
44.00
0.00
0
0,00
0.00
45.00
0.00
0
0.00
0.00
46.00
0.00
0
0.00
0.00
47.00
0.00
0
0.00
0.00
4&00
0.00
0
0.00
0.00
49.00
0.00
0
0.00
0.00
50.00
OM
0
0.00
0.00

Verner Child Care 1, 1 -yr Storm (Post-Const) Rainfall Duration=5 min, Inten=3.95 in1hr
Prepared by Davis CivilSolutions, PA Printed 3/13/2020
HydroCAD@10,10-3a s/n03655 @2020 HydroCAD Software Solutions LLC Page 8
Elevation Primary
(feet)
(cfs�
0.00
0.00
0.04
0,00
OM
0.01
0.12
0.01
0,.16
0,02
0.20
OM
0.24
0.02
0.28
0.03
0.32
0.03
0,36
0.03
0.40
0,03
0.44
0,04
0.48
0.04
0.52
0,04
0.56
0.04
0.60
0.04
0.64
0,04
OM
0.05
0.72
0.05
0.76
0.05
0.80
0.05
0.84
0.05
0.88
0.05
0.92
0.05
0.96
0.06
1.00
0.06
1.04
0.06
1.08
0.06
1.12
0.06
1.16
0,06
1.20
0.06
1.24
0.06
1.28
0.07
1.32
0.07
1.36
0.07
1.40
O„07
1.44
0.07
1.48
0.07
1.52
0,07
1.56
0.07
1.60
0,07
1.64
0,07
1.68
0.08
1.72
0.08
1.76
0.08
1.80
0.08
1.84
0.08
1.88
0.08
1.92
0,08
1,96
0,08
2.00
0.08
2.04
0.09
Stage -Discharge for Pond 1 P: Stormy Tech
Elevation Primary
{feet)
(cf S)
2.08
0.11
2.12
0.14
2.16
0,19
2,20
0,24
2,24
0.30
2.28
0,38
2,32
0,46
2.36
0.55
2.40
0.65
2,44
0,75
2,48
0.86
2.52
0.97
2,56
1,09
2.60
1.20
2.64
1,32
2,68
1.43
2.72
1.54
2.76
1,65
2.80
1.74
2.84
1.81
2.88
1.89
2.92
1.96
2.96
2.04
3.00
2.11
3.04
2.25
3.08
2.47
3.12
2.72
3.16
3.01
3.20
3.34
3.24
3.69
3.28
4.07
3.32
4.48
136
4.91
3.40
5.36
3.44
5.84
3.48
6.35
3.52
6.87
3.56
7.42
3.60
7.99
3,64
8.58
3,68
9.19
3.72
9,82
3,76
10.47
3.80
11.15
3.84
11.84
3.88
12.56
3.92
13.29
3.96
14.04
4.00
14.82
4.04
15,43
4,08
15,53
4.12
15.62
Elevation Primary
(feet)
(cfS)
4.16
15.71
4.20
15.80
4.24
15.90
4.28
15.99
4.32
16.08
4.36
16.17
4.40
16.26
4.44
16.34
4.48
16.43
4.52
16.52
4.56
16.61
4.60
16.70
4.64
16.78
4.68
16.87
4.72
16,95
4.76
17.04
4.80
17.12
4.84
17,21
4.88
17,29
4.92
17.38
4.96
17,46
5.00
17.54
5.04
17.62
5,08
17.71
5.12
17.79
5,16
17.87
5.20
17.95
5.24
18.03
5,28
18.11
5,32
18.19
5.36
18.27
5,40
1&35
5,44
18.43
5.48
18.51
2!

Verner Child Care 1, I-yr Storm (Post-Const) Rainfall Duration=5 min, Inten=3.95 in1hr
Prepared by Davis CivilSolutions, PA Printed 3/13/2020
HydroCAD@10.10-3a s/n03655 @2020 HydroCAD Software Solutions LLC Page 9
Elevation
Storage
----(feet)
(cubic -feet)
0,00
0
0.04
23
0,08
47
0,12
70
0.16
93
0,20
117
0,24
140
0.28
163
0,32
187
0.36
210
0.40
233
0,44
257
0,48
280
0.52
303
0,56
326
0.60
350
0.64
373
0.68
396
0.72
420
0.76
449
0.80
498
0.84
547
0.88
5,95
0.92
643
0.96
692
1.00
740
1.04
788
1.08
836
1 A 2
884
1.16
932
1.20
980
1.24
1,028
1.28
1,076
1.32
1,123
1.36
1,171
1.40
1,219
1.44
1,266
1.48
1,313
1.52
1,360
1.56
1,408
1.60
1,455
1,64
1,501
1.68
1,548
1.72
1,595
1.76
1,641
1.80
1,688
1.84
1,734
1.88
1,781
1.92
1,827
1.96
1,873
2,00
1,919
2.04
1,964
Stage -Area -Storage for Pond 1 P: StormTech
Elevation
Storage
(feet)
(cubic -feet)
2.08
2,010
2.12
2,055
2.16
2,101
2.20
2,146
2.24
2,191
2.28
2,236
2.32
2,281
2.36
2,325
2.40
2,370
2.44
2,414
2.48
2,458
2.52
2,502
2.56
2,546
2.60
2,589
2.64
2,633
2.68
2,676
2.72
2,719
2.76
2,762
2.80
2,804
2.84
2,846
2.88
2,889
2.92
2,931
2.96
2,972
100
3,014
3,04
3,055
3.08
3,096
3,12
3,137
3.16
3,177
3.20
3,217
3,24
3,257
3,28
3,297
3.32
3,336
3,36
3,375
3.40
3,414
3.44
3,452
3,48
3,490
3.52
3,528
3.56
3,565
3,60
3,602
3.64
3,639
3.68
3,675
3.72
3,711
3.76
3,746
3.80
3,781
3.84
3,815
188
3,849
3,92
3,882
3.96
3,915
4.00
3,946
4.04
3,977
4.08
4,008
4.12
4,037
Elevation
Storage
(feet)
(cubic -feet)
4.16
4,065
4.20
4,092
4.24
4,118
4.28
4,144
4,32
4,169
4.36
4,194
4.40
4,219
4.44
4,243
4.48
4,267
4.52
4,290
4.56
4,313
4.60
4,337
4.64
4,360
4.68
4,383
4.72
4,407
4.76
4,430
4.80
4,453
4.84
4,477
4.88
4,500
4,92
4,,523
4.96
4,547
5.00
4,570
5.04
4,593
5.08
4,617
5.12
4,640
5.16
4,663
5.20
4,687
5.24
4,710
5.28
4,733
5.32
4,756
5.36
4,780
5.40
4,803
5,44
4,826
5.48
4,850
R

Verner Child Care 1, 10-yr Storm (Pre-Const) Rainfall Duration=5 min, Inten=6.37 in1hr
Prepared by Davis CivilSolutions, PA Printed 3113/2020
HydroCADO 10.10-3a s/n 03655 @ 2020 HydroCAD Software Solutions LLC - Page I
Summary for Subcatchment IS: Runoff
Verner Child Care 1, 1 O-yr Storm (Pre -Construction)
Runoff 4.13 cfs @ 0.08 hrs, Volume= 0.029 af, Depth= 0.21"
Runoff by Rational method, Rise/FWI=1.0/1.0 xTc, Time Span= 0,00-3.00 hrs, dt= 0.01 hrs
Rainfall Duration=5 min, Inten=6.37 in/hr
Area (ac) C. Description
0.440
0.25
Woodlands
1.020
0.40
Playgrounds, Sparse Grass
0,250
0.60
Bare Packed Soil, Smooth
1.710
0.39
Weighted Average
1,710
100.00% Pervious Area
Tc Length Slope Velocity Capacity Description
(min) (feet )(ft/ft) (ft/sec) (cfsj
5.0 220 0.73 Direct Entry, Tc Entered Directly
Subcatchment IS: Runoff
Hydrograph
4.13 cls
4-
Rainfall
Duration=5 min,
3-
Runoff Area=1.710 ac
Runoff Vol ume=0.029 of
2, --R� 11­off DWh1_­0-.21"
Flow Length=220'
C=0.39
0-
0 2
Time (hours)
M

Verner Child Care 1, 10-yr Storm (Pre-Const) Rainfall Duration=5 min, Inten=6.37inlhr
Prepared by Davis CivilSolutions, PA Printed 3/13/2020
HydroCADO 10, 1 0-3a s/n 03655 @ 2020 HydroCAD Software Solutions LLC Page 2
Time Runoff
(hours) (cfs)
0.00 0.00
0,02 1.03
0.04 2.06
OM 3.08
0.08 4.11
0.10 3.43
0,12 2.40
0.14 1.37
0.16 0.34
0,18 0.00
0,20 0.00
0.22 0.00
0,24 0.00
0.26 0.00
0.28 0.00
0.30 0.00
0.32 0.00
0.34 0.00
0.36 0.00
0.38 0.00
0.40 0.00
0.42 0.00
0.44 0.00
0.46 0.00
0.48 0,00
0.50 0.00
0.52 0.00
0.54 0,00
0.56 0.00
0.58 0.00
0.60 0,00
OM 0.00
0.64 0.00
0.66 0,00
0.68 0,00
0.70 0.00
0.72 0,00
0.74 0.00
0.76 0.00
0.78 MO
0.80 0.00
0.82 OM
0.84 0.00
0.86 0.00
0.88 0.00
0,90 0,00
0,.92 0.00
0.94 0.00
0.96 0.00
0.98 0.00
1.00 0.00
1.02 0.00
Hydrograph for Subcatchment 1S: Runoff
Time Runoff
(hours) (cf S)
1.04 0.00
1.06 0.00
1.08 0.00
1.10 0.00
1.12 0.00
1.14 0.00
1.16 0.00
1.18 0.00
1.20 0.00
1.22 0.00
1.24 MO
1.26 OM
1.28 0.00
1.30 0.00
1.32 0.00
1.34 0.00
1.36 0,00
1.38 0,00
1.40 0.00
1.42 0,00
1.44 UO
1,46 0.00
1.48 0.00
1.50 0.00
1.52 0.00
1.54 0.00
1,56 0.00
1,58 0.00
1.60 0-00
1,62 0.00
1.64 0.00
1.66 0.00
1,68 0.00
1.70 0.00
1.72 0.00
1.74 0.00
1,76 0.00
1.78 0.00
1.80 0,00
1.82 0.00
1.84 0,00
1.86 0.00
1.88 0.00
1.90 0.00
1,92 0.00
1.94 0.00
1,96 0.00
1.98 0.00
2.00 0.00
2.02 0,00
2.04 0.00
2.06 0,00
Time Runoff
(hours)
(cfs)
2.08
0.00
2.10
0,00
2.12
0.00
2.14
OM
2.16
0.00
2.18
0,00
2.20
0.00
2.22
0,00
2.24
0.00
2.26
0.00
2.28
0.00
2.30
0.00
2,32
0.00
2.34
0.00
2.36
0.00
2.38
0.00
2,40
0.00
2.42
01.00
2,44
0.00
2,46
0.00
2.48
0.00
2.50
0.00
2.52
0.00
2.54
0,00
2.56
0.00
2.58
0.00
2.60
0,00
2.62
0,00
2.64
0.00
2.66
0.00
2.68
MO
2.70
MO
2.72
0,00
2.74
0,00
2.76
0.00
2.78
0,00
2.80
0,00
2.82
0.00
2,84
0.00
2.86
0.00
2,88,
0.00
2.90
0.00
2,92
0.00
2.94
0.00
2.96
0.00
2.98
0.00
3.00
OM
16

Verner Child Care 1, 10-yr Storm (Post-Const) Rainfall Duration=5 min, Inten=6.37inlhr
Prepared by Davis CivilSolutions, PA Printed 3/1312020
HydroCAD@10.10-3a s/n03655 @2020_HydroCAD Software Solutions LLC Page 1
Summary for Subcatchment 1S: Runoff
Verner Child Care 1, Detention, 10-yr. Storm {Post -Construction)
Runoff = 8.69 cfs @ 0.08 hrs, Volume= 0.062 af, Depth= 0.43"
Runoff by Rational method, Rise/Fall=1.0/1 0 xTc, Time Span= 0.00-50.00 hrs, dt= 0.01 hrs
Rainfall Duration=5 min, lnten=6.37 in/hr
Area (ac) C Descriotion
0.140
0.20
Lawns, Maintained
0.400
0.80
Turf
1.170
0.90
Rooftop, Pavement
1.710
0,82
Weighted Average
1.710
100.00% Pervious Area
Tc Length Slope Velocity Capacity Descrilption
(min) (feet) (ft/ft) (ft/sec) (cfs)
5.0 Direct Entry, Tc entered directly
0
LL
IR

Verner Child Care 1, 10-yr Storm (Post-Const) Rainfall Duration=5 min, Inten=6.37inlhr
Prepared by Davis CivHSolutions, PA Printed 3/1312020
HydroCADO 10.10-3a s/n 03655 @ 2020 HydroCAD Software Solutions LLC Pagge 2
Time Runoff
(hours) (cfs)
0.00 0.00
0.50 0.00
1.00 0.00
1.50 0.00
2.00 0.00
2.50 0.00
3,00 0.00
150 0.00
4.00 0.00
4,50 0.00
5,00 0.00
5.50 0.00
6.00 0.00
6,50 0.00
7.00 0.00
7.50 0.00
8.00 0.100
8.50 0.00
9.00 0.00
9.50 0.00
10.00 0.00
10.50 0.00
11.00 0.00
11.50 0.00
12.00 0.00
12.50 0.00
13.00 0.00
13.50 0.00
14.00 0.00
14.50 0,00
15.00 0.00
15.50 0.00
16.00 0.00
16.50 0.00
17.00 0.00
17.50 0.00
18.00 0.00
18.50 0.00
19.00 0.00
19-50 0.00
20.00 0.00
20.50 0.00
21,00 0.00
21,50 0,00
22.00 0.00
22.50 0,00
23.00 0.00
23.50 0.00
24.00 0.00
24.50 0.00
25.00 0.00
25,50 0,00
Hydrograph for Subcatchment 1S: Runoff
Time Runoff
(hours) (cf S)
26.00 0.00
26.50 0.00
27.00 0.00
27.50 0.00
28.00 MO
2&50 0.00
29.00 0.00
29.50 MO
30.00 0.00
30.50 0.00
31.00 0.00
31.50 MO
32.00 0.00
32.50 0.00
33.00 0.00
33.50 0.00
34.00 0.00
34.50 0.00
35.00 0.00
35.50 0.00
36.00 0.00
36.60 0.00
37.00 0,00
37,50 0,00
38.00 0.00
38.50 0,00
39,00 0,00
39.50 0.00
40.00 0,00
40.50 0,00
41.00 0.00
41,50 0.00
42,00 0,00
42.50 0.00
43,00 0,00
43.50 0,00
44.00 0.00
44.50 0,00
45.00 0.00
45.50 0.00
46.00 0.00
46.50 0.00
47.00 0.00
47.50 0.00
48.00 OM
48,50 OM
49.00 0.00
49.50 0.00
50.00 OM
Ud

Verner Child Care 1, 10-yr Storm (Post-Const) Rainfall Duration=5 min, Inten=6.37 in1hr
Prepared by Davis CivilSolutions, PA Printed 3/13/2020
HydroCADO 10.10-3a s/n 03655 @ 2020 HydroCAD Software Solutions LLC Page 3
Summary for Pond 1 P: Detention Facility (H)
StormTech Detention Facility
Inflow Area = 1.710 ac, 0.00% Impervious, Inflow Depth = 0.43"
Inflow 8.69 cfs @ 0.08 hrs, Volume= 0.062 of
Outflow 1.06 cfs @ 0,16 hrs, Volume= 0.062 af, Atten= 88%, Lag= 4.5 min
Primary = 1.06 cfs @ 0.16 hrs, Volume= 0,062 of
Routing by Stor-Ind method, Time Span= 0,00-50.00 hrs, dt= 0.01 hrs
Peak Elev= 2.55' @ 0.16 hrs Surf.Area= 1,458 sf Storage= 2,536 cf
Plug -Flow detention time= 213.3 min calculated for 0.062 of (100%© of inflow)
Center -of -Mass det. time= 213.1 min ( 218.1 - 5.0 )
Volume Invert AvaiI.Storage Storage Description
#11A MY 2,103 cf 29.92M x 48.721 x 5.50'H Field A
8,016 cf Overall - 2,758 cf Embedded = 5,258 cf x 40.0% Voids
#2A 0. 75' 2,758 cf ADS StorrnTech MC-3500 d +Cap x 24 Inside #1
Effective Size= 70.4"W x 45.0"H => 15.33 sf x 7.1171 = 110.0 cf
Overall Size= 77.0"W x 45.0"H x 7.50'L with 0.33'Overlap
24 Chambers in 4 Rows
Cap Stora9e= +14.9 cf x 2 x 4 rows = 119.2 cf
4,861 cf Total Available Storage
Storage Group A created with Chamber Wizard
Device
Routing
Invert
Outlet Devices
#1
Primary
MO'
18.0" Vert. Orifice/Grate C=0.600 Limited to weir flow at low heads
#2
Device 1
0.00'
1.5" Vert. Orifice/Grate C= 0.16,00 Limited to weir flow at low heads
#3
Device 1
2.00'
10.0" Vert. Orifice/Grate C=0.6010 Limited to weir flow at low heads
#4
Device 1
3.00'
3.0' long Sharp -Crested Rectangular Weir 2 End Contraction(s)
0.5' Crest Height
Primary OutFlow Max=1.05 cfs @ 0,16 hrs HW=2.55' (Free Discharge)
t- =Orifice/Grate (Passes 1.05 cfs of 11.41 cfs potential flow)
A6
-2=Orifice/Grate (Orifice Controls 0.09 cfs @ 7.59 fps)
-3=Orifice/Grate (Orifice Controls 0,96 cfs @ 2.52 fps)
-4=S ha rp-C rested Rectangular Weir ( Controls 0,00 cfs)
M

Verner Child Care 1, 1 0-yr Storm (Post-Const) Rainfall Durafion=5 min, Inten=6.37inlhr
Prepared by Davis CivilSolutions, PA Printed 3/13/2020
HydroCADO 10.10-3a s/n 03655 @ 2020 HydroCAD Software Solutions LLC Page 4
Pond 1 P: Detention Facility (H) - Chamber Wizard Field A
Chamber Model = ADS-StormTech MC-3500 d +Cap (ADS StormTecho MC-3500 d rev 03/14 with Cap
volume)
Effective Size= 70.4"W x 45.0"H => 15.33 sf x 7.171 = 110.0 cf
Overall Size= 77.0"W x 45.0"H x 7.501 with 0.33'Overlap
Cap Storage= +14.9 cf x 2 x 4 rows = 119.2 cf
77.0" Wide + 9.0" Spacing = 86.0" C-C Row Spacing
6 Chambers/Row x 7.17' Long +1.85' Cap Length x 2 = 46.72' Row Length +12.0" End Stone x 2 = 48.72'
Base Length
4 Rows x 77.0" Wide + 9.0" Spacing x 3 + 12.0" Side Stone x 2 = 29.92' Base Width
9.0" Stone Base + 45.0" Chamber Height + 12.0" Stone Cover = 5.50' Field Height
24 Chambers x 110.0 cf + 14.9 cf Cap Volume x 2 x 4 Rows = 2,758.0 cf Chamber Storage
8,016.5 cf Field - 2,758.0 cf Chambers = 5,258.4 cf Stone x 40.0% Voids = 2,103.4 cf Stone Storage
Chamber Storage + Stone Storage = 4,861.4 cf = 0.112 of
Overall Storage Efficiency = 60.6%
Overall System Size = 48.72'x 29.92'x 5.50'
24 Chambers @ $ 0.00 lea = $ 0.00
296.9 cy Field Excavation @ $ 0.00 Icy = $ 0.00
194.8 cy Stone @ $ 0.00 Icy = $ 0.00
Total Cost = $ 0.00
I I ki EARN M
I I

Verner Child Care 1, 10-yr Storm (Post-Const) Rainfall Duration=5 min, Inten=6.37 in1hr
Prepared by Davis CivilSolutions, PA Printed 3/13/2020
HydroCADO 10.10-3a s/n 03655 @ 2020 HydroCAD Software Solutions LLC Page 5
Inflovw
� Primary
0
U.
0
w
K

Verner Child Care 1, 10-yr Storm (Post-Const) Rainfall Duration=5 min, Inten=6.37 in✓hr
Prepared by Davis CivilSolutions, PA Printed 3/13/2020
HydroCAD@10.10-3a s/n03655 @2020 HydroCAD Software Solutions LLC Page 6
Pond 1 P: Detention Facility (H)
Stage -Area -Storage
5
it
. . . ...... . .... ... .. ..........
2-
-7 --------
0-
0 500 1,000 1,500 2,600, 2,900, 3,000 3,500 4,000 4,500
Storage (cubic -feet)
a

Verner Child Care 1, 10-yr Storm (Po,st=Const) Rainfall Duration=5 min, Inten=6.37inlhr
Prepared by Davis CivilSolutions, PA Printed 3/13/2020
HydroCAD@10,10-3a s/n03655 @2020 HydroCAD Software Solutions LILC Page 7
Hydrograph for Pond 1 P. Detention Facility (H)
Time
Inflow
Storage
Elevation
Primary
(hours)
(cfs)
(culbic-feet)
(feet)
(Cf S)
0.00
0.00
0
0.00
0.00
1.00
0.00
1,886
1.97
0.08
2.00
0.00
1,602
1.73
OM
3.00
0.00
1,337
1.50
0.07
4.00
0.00
1,092
1.29
0,07
5.00
0.00
865
1.10
0.06
6.00
0.00
657
0.93
0.06
7.00
0.00
468
0.78
0.05
8.00
MO
305
0.52
0.0,4
9.00
MO
180
0.31
0.03
10.00
0.00
94
0.16
0.02
11.00
MO
47
0.08
0.01
12.00
OM
28
0.05
0.00
13.00
0.00
17
0.03
0.00
14.00
0.00
11
0.02
0.00
15.00
0.00
7
Mi
0.00
16.00
0.00
4
0.01
0.00
17.00
0.00
3
0.00
0.010
18.00
0.00
2
0.00
0.00
19.00
0.00
1
0.00
0.00
20.0,0
0.00
1
0.00
0.00
21.00
0.00
0
0.00
0.00
22.00
0.00
0
0.00
0.00
23.00
UO
0'
0.00
0.00
24,00
0.00
0
0.00
0.00
25,00
0.00
0
0.00
0.00
26.00
0.00
0
0,00
0.00
27.00
0.00
0
0,00
0.00
28.00
0.00
0
0.00
0.00
29.00
0.00
0
0,00
0.00
30,00
0.00
0
OM
0.00
31.00
0.00
0
0.00
0,00
32.00
0,00
0
0,00
0.00
33.00
0.00
0
0,00
OM
34.00
0.00
0
OM
0,00
35.00
0.00
0
0,00
0.00
36,00
0.00
0
0.00
0.00
37.00
0.00
0
0.00
0.010
38.00
0.00
0
0'00
0.00
39.00
OM
0
0.00
0.00
40.00
0.00
0
0.00
0.00
41.00
0,00
0
0.00
0.00
42.00
OM
0
0.00
0.00
43.00
0.00
0
0.00
0.00
44.00
0,00
0
0.00
0.00
45,00
0.00
0
0.00
0.00
46.00
0.00
0
0,00
0.00
47,00
0.00
0
0.010
0.00
48.00
0.00
0
0.00
0.00
49.00
0.00
0
0.00
0.00
50.00
0.00
0
0.00
0.00

Verner Child Care 1, 10-yr Storm (Post-Const) Rainfall Duration=5 min, Inten=6.37 in1hr
Prepared by Davis CivilSolutions, PA Printed 3/13/2020
HydroCAD@10.10-3a s/n03655 02020 HydroCAD Software Solutions LLC Page 8
Elevation Primary
(feet)
(Cfs)
0.00
0.00
0.04
0.00
0.08
0.01
0.12
0,01
0.16
0,02
0.20
0.02
0.24
0,02
0.28
0,03
0.32
0.03
0.36
0,03
0.40
0,03
0.44
0.04
0.48
0,04
0.52
0,04
0.56
0.04
MO
0.04
M4
0.04
0.68
0.05
0.72
0.05
0.76
0.05
0.80
0.05
0.84
0.05
0.88
0.05
0,92
0.05
0.96
0.06
1,00
0.06
1.04
0.06
1.08
0.06
1,12
0.06
1.16
0.06
1.20
0.06
1,24
0.06
1.28
0.07
1.32
0.07
1,36
0,07
1,40
0.07
1.44
0.07
1.48
0.07
1.52
0.07
1.56
0.07
1.60
0,07
1.64
0.07
1.68
0,08
1.72
0.08
1.76
0.08
1.80
0.08
1.84
0.08
1.88
0.08
1.92
0.08
1.96
0.08
MO
0,08
2,04
0.09
Stage -Discharge for Pond 1 P: Detention Facility (H)
Elevation Primary
(feet)
(cfs)
2.08
0.11
2.12
0.14
2.16
0.19
2.20
0.24
2.24
0.30
2.28
0,38
2.32
0.46
2.36
0.55
2.40
0.65
2.44
0.75
2.48
0.86
2.52
0.97
2.56
1.09
2.60
1.20
2.64
1,3
2.68
1.43
2.72
1.54
2.76
1,65
2.80
1,74
2.84
1. 81
2.88
1.89
2.92
1.96
2.96
2.04
3.00
2.11
104
2.25
3.08
2.47
3.12
2.72
3.16
3.01
3,20
3.34
3.24
3.69
3,28
4.07
332
4.48
3.36
4.91
3.40
5.36
3,44
5.84
3.48
6.35
3.52
6.87
3.56
7.42
3.60
7.99
3.64
8,58
3.68
9.19
3.72
9,82
3.76
10.47
3.80
11.15
3,84
11.84
3,88
12.56
3.92
13.29
3.96
14.04
4.00
14.82
4.04
15.43
4.08
15,53
4.12
15.62
Elevation Primary
(feet)
(Cfs)
4.16
15,71
4.20
15.80
4.24
15.90
4.28
15.99
4.32
16.08
4.36
16.17
4.40
16.26
4.44
16.34
4.48
16.43
4.52
16.52
4.56
16.61
4.60
16.70
4.64
16.78
4.68
16.87
4,72
16.95
4.76
17.04
4,80
17.12
4.84
17.21
4.88
17,29
4,92
17.38
4.9,6
17.46
5.00
17.54
5.04
17.62
5.08
17,71
5.12
17.79
5A6
17.87
5.20
17.95
5.24
18.03
5.28
18.11
5.32
18.19
5.36
18.27
5.40
18.35
5.44
18.43
5.48
18.61

Verner Child Care 1, 1 O-yr Storm (Post-Const) Rainfall Duration=5 min, Inten=6,37 in1hr
Prepared by Davis CivilSolutions, PA Printed 3/13/2020
HydroCADG 10.10-3a s/n 03655 @ 2020 HydroCAD Software Solutions LLC Page 9
Stage -area -Storage for Pond 1P: Detention Facility (H)
Elevation
Storage
feet
(cubic -feet)
0.00
0
0.04
23
0.08
47
0.12
70
0.16
93
0.20
117
0.24
140
0.28
163
0.32
187
0.36
210
OAO
233
0.44
257
0.48
280
0.52
303
0.56
326
0.60
350
0.64
373
0.68
396
0.72
420
0.76
449
0.80
498
0.84
547
0.88
595
0.92
643
0.96
692
UO
740
1.04
788
1.08
836
1.12
884
1.16
932
1.20
980
1.24
1,028
1.28
1,076
1.32
1,123
1.36
1,171
1 A
1,219
1.44
1,266
1.48
1,313
1.52
1,360
1.56
1,408
1.60
1,455
1.64
1,501
1,68
1,548
1,72
1,595
1.76
1,641
1.80
1,688
1.84
1,734
1.88
1,781
1.92
1,827
1.96
1,873
2.00
1,919
2,04
1,964
Elevation
Storage
(feet)
(cubic -feet)
2.08
2,010
2.12
2,055
2.16
2,101
2.20
2,146
2.24
2,191
2.28
2,236
2.32
2,281
2.36
2,325
2.40
2,370
2.44
2,414
2,48
2,458
2.52
2,502
2.56
2,546
2.60
2,589
2.64
2,633
2.68
2,676
2.72
2,719
2.76
2,762
2.80
2,804
2.84
2,846
2.88
2,889
2.92
2,931
2.96
2,972
3.00
3,014
3.04
3,055
3.08
3,096
3,12
3,137
3,16
3,177
3.20
3,217
3,24
3,257
3.28
3,297
3.32
3,336
336
3,375
3.40
3,414
&44
3,452
3,48
3,490
3.52
3,528
3.56
3,565
3.60
3,602
3.64
3,639
3.68
3,675
3.72
3,711
3.76
3,746
3.80
3,781
3.84
3,815
3.88
3,849
3,92
3,882
3.96
3,915
4.00
3,946
4.04
3,977
4.08
4,008
4.1�2
4,037
Elevation
Storage
(feet)
(cubic -feet)
4.16
4,065
4.20
4,092
4.24
4,118
4.28
4,144
4.32
4,169
4.36
4,194
4.40
4,219
4.44
4,243
4.48
4,267
4.52
4,290
4.56
4,313
4.60
4,337
4.64
4,360
4.68
4,383
4.72
4,407
4.76
4,430
4.80
4,453
4.84
4,477
4.88
4,500
4.92
4,523
4.96
4,547
5.00
4,570
5.04
4,593
5.08
4,617
5,12
4,640
5.16
4,663
5.20
4,687
5,24
4,710
5,28
4,733
5.32
4,756
5.36
4,780
5,40
4,803
5.44
4,826
5,48
4,850
MAI

Verner Child Care 1, 25-yr Storm (Pre-Const) Rainfall Duration=5 min, 1nten=7.32in1hr
Prepared by Davis CivilSolutions, PA Printed 3/13/2020
HydroCAD@10,10-3a s/n03655 @2020 HydroCAD Software Solutions LLC Page I
Summary for Subcatchment 1S: Runoff
Verner Child Care 1, 25-yr Storm (Pre -Construction)
Runoff 4.75 efs @ 0.08 hrs, Volume= 0.034 af, Depth= 0.24"
Runoff by Rational method, Rise/Fall=1.0/1.0 xTc, Time Span= 0.00-3.00 hrs, dt= 0.01 hrs;
Rainfall Duration=5 min, Inten=7.32 in/hr
Area (act C Description
0.440
0,25
Woodlands
1.020
0.40
Playground, Sparse Grass
0.25,0
0.60
Bare Packed Soil, Smooth
1.710
0.39
Weighted Average
1710
100.00% Pervious Area
Tc Length Slope Velocity Capacity Description
(min) (feet) (ft/ft) (ft/sec) (cfs)
5.0 220 0,73 Direct Entry, Tc: Entered Directly
Subcatchment 1S: Runoff
Hydrograph
5 4.75 ds
Rainfall
.-Dulration=5-min­
4
lnten=7.32 in/hr
RunoffVolume=0.034 of
Runoff Depth=0.24"
2-
Flow Length=220'
Tc=5.0 min
C=0.39
0'
2
6 1
Time (hours)
10 Runoff
Luw-.NN.A
M

Verner Child Care 1, 25-yr Storm (Pre-Const) Rainfall Durafion=5 min, Inten=7,32 in1hr
Prepared by Davis CivilSolutions, PA Printed 3/13/2020
HydroCADO 10. 1 O-3a s/n 03655 @ 2020 HydroCAD Software Solutions LLC Page 2
Time Runoff
(hours) (cfs)
0.00 0.00
OM 1.18
0.04 2.36
0.06 3.54
0.08 4.73
0,10 194
0,12 2.76
0,14 1.58
0.16 0.39
0.18 0.00
0.20 0.00
0.22 0.00
0.24 0.00
0.26 0.00
0.28 0.00
0,30 0.00
0.32 0.00
0.34 0.00
0.36 0.00
0.38 OM
0.40 0.00
0.42 0.00
0.44 MO
0.46 0.00
0.48 0.00
0.50 0.00
0.52 0.00
0,54 01.00
0.56 0,00
0.58 0.00
OZO 0.00
0,62 0,00,
0.64 0,00
0,66 0.00
0.68 0,00
0.70 0.00
0,72 0.00
0.74 0.00
0.76 0.00
0.78 0.00
0.80 0.00
0.82 0.00
0.84 0.00
0.86 OM
0.88 0.00
0.90 0,00
0.92 0.00
0.94 0.00
0.96 0.00
0.98 0.00
1.00 0.00
1.02 0.00
Hydrograph for Subcatchment IS: Runoff
Time Runoff
(hours) (cfs)
1.04 0,00
1.06 0.00
1.08 0.00
1.10 0.00
1.12 0.00
1.14 0.00
1.16 0.00
1.18 0.00
1.20 0.00
1.22 0.00
1.24 0.00
1.26 0.00
1.28 0.00
1.30 0.00
1.32 0.00
1.34 0.00
1.36 0.00
1.38 0.00
1.40 0,00
1.42 0,00
1,44 0.00
1,46 0,00
1.48 0.00
1,50 0.00
1,52 OM
1.54 0,00
1.56 0.00
1.58 0.00,
1.60 0.00
1.62 0.00
1.64 0.00
1.66 0.00
1.68 OM
1.70 0.00
1.72 0.00
1.74 0.00
1,76 0.00
1.78 0.00
1,80 0.00
1.82 0.00
1.84 0.00
1,86 0.00
1.88 0.00
1.90 0.00
1.92 0.00
1.94 0.00
1.96 0.00
1,98 0.00
2.00 OM
2,02 01.00
2.04 0.00
2.06 0.00
Time Runoff
(hours)
- (cfs)
2.08
0,00
2,10
0.00
2,12
0,00
2.14
0.00
2,16
0.00
2.18
0.00
2.20
0.00
2,22
0.00
2.24
0,00
2.26
0.00
2,28
0.00
2.30
0,00
2.32
0.00
2,34
0.00
2.36
0,00
2.38
0.00
2.40
0.00
2,42
0.00
2.44
0.00,
2.46
0.00
2.48
0.00
2.50
0.00
2.52
0.00
2.54
0.00
2.56
0.00
2.58
0.00
2.60
0.00
2.62
0.00
2.64
0.00
2.66
0.00
2.68
MO
2.70
0.00
2,72
0.00
2.74
0,00
2.76
0.00
2.78
0.00
2.80
0.00
2.82
0.00
2.84
0.00
2.86
0.00
2.88
0.00
2,90
0.00
2.92
0,00
2,94
0.00
2.96
0,00
2.98
0.00
3.00
0.00

Verner Child Care 1, 25-yr Storm (Post-Const) Rainfall Duration=5 min, Inten=7.32 in1hr
Prepared by Davis CivilSolutions, PA Printed 3/13/2020
HydroCAD@10.10-3a s/n03655 @2020 HydroCAD Software Solutions LLC Page 1
Summary for Subcatchment 1 S: Runoff
Verner Child Care 1, Detention, 25-yr Storm (Post -Construction)
Runoff 9.99 cfs @ 0.08 hrs, Volume= 0.071 af, Depth= 0.50"
Runoff by Rational' method, Rise/Fall=1.0/1.0 xTc, Time Span= 0.00-50.00 hrs, dt= 0.01 hrs
Rainfall Duration=5 min, Inten=7.32 in/hr
Area (ac) C Description
0.140
0.20
Lawns, Maintained
0.400
0.80
Turf
1.170
0.90
Rooftop, Pavement
1.710
0,82
Weighted Average
1.710
100,00% Pervious Area
Tc Length, Slope Velocity Capacity Description
(min) (feet) (ft/ft) (ft/sec) (cfs)
5.0 220 0.73 Direct Entry, Tc Entered Directly
FE=-----'
Mi
DM

Verner Child Care 1, 25-yr Storm (Post-Const) Rainfall Duration=5 min, Inten=7.32 in✓hr
Prepared by Davis CivilSolutions, PA Printed 3/13/2020
HydroCAD@10.10-3a s/nO3655 @2020 HydroCAD Software Solutions LLC Page 2
Time Runoff
(hours) (cfs)
0.00 U01
0.50 0.00
1.00 0.00
1.50 MO
2.00 0.00
2.50 OM
3.00 0.00
3,50 0.00
4.00 0.00
4,50 0.00
5.00 0.00
5.50 0.00
6,00 0.00
6.50 0.00
7.00 0.00
7.50 0.00
8.00 0.00
8.50 0.00
9.00 MO
9.50 01.00
10.00 0.00
10.50 OM
11.00 0.00
11.50 0.00
12.00 0,00
12.50 0.00
13.00 0.00
13.50 0,00
14.00 0.00
14.50 0.00
15.00 0.00
15.50 0.00
16.00 0.00
16.50 0,00
17.00 0,00
17.50 0.00
18.00 0.00
18.50, 0.00
19.00 0.00
19.50 0.00
20.00 OM
20.50 0.00
21,00 MO
21.50 0.00
22.00 0.00
22.50 MO
23.00 MO
23.50 0.00
24.00 0.00
24.50 0.00
25,00 0.00
25.50 0.00
Hydrograph for Subcatchment 1 S: Runoff
Time Runoff
(hours} (cfs)
26.00 0.00
26.50 UO
27,00 0.00
27,50 0.00
28.00 0,00
28,50 0.00
29,00 0.00
29.50 0.00
MOO 0.00
30.50 0.00
31.00 0,00
31,50 0,00
32,00 0.00
32.50 0,00
33,00 0,00
33.50 0.00
34.00 0,00
34,50 UO
35.00 0.00
35.50 0.00
36-00 0.00
36.50 0.00
37.00 0.00
37.50 0.00
38.00 0.00
38.50 0.00
39.00 0.00
39.50 0.00
40.00 0.00
40.50 0.00
41.00 0.00
41.50 0.00
42.00 0.00
42.50 0.00
43.00 0.00
43.50 0,00
44.00 MO
44.50 UO
45.00 0,00
45,50 0.00
46.00 0,00
46.50 0.00
47.00 0.00
47.50 0.00
48.00 0.00
48.50 0.00
49.00 0.00
49.50 0.00
50.00 0,00

Verner Child Care 1, 25-yr Storm (Past -Coast) Rainfall Duration=5 min, Inten=7.32 in1hr
Prepared by Davis CivilSolutions, PA Printed 3/13/2020
HydroCAD@10.10-3a s/n03655 @2020 HydroCAD Software Solutions LLC Page 3
Summary for Pond I P: StormTech
StormTech Detention Facility
I nfl ow Area = 1,710 ac, 0.00% Impervious, Inflow Depth = 0.50"
Inflow = 9.99 cfs @ 0.08 hrs, Volume= 0.071 of
Outflow = 1.75 cfs, @ 0.15 hrs, Volume= 0.071 af, Atten= 83%, Lag= 4.2 min
Primary = 1.75 cfs @ 0.15 hrs, Volume= 0.071 of
Routing by Stor-Ind method, Time Span= 0,00-50.00 hrs, dt= 0.01 hrs
Peak Elev= 2.80' @ O� 15 hrs Surf.Area= 1,458 sf Storage= 2,809 cf
Plug -Flow detention time= 188.4 min calculated for 0.071 of (100% of inflow)
Center -of -Mass det. time= 188.7 min ( 193.7 - 5.0 )
Volume Invert Avail.Storage Storage Des"i tion
#1A 0.00, 2,103 of 29.92'W x 48.72'L x 5.50'H Field A
8,016 cf Overall - 2,758 cf Embedded = 5,258 cf x 40.0% Voids
#2A 0.75' 2,758 cf ADS StormTech MC-3500 d +Cap x 24 Inside #1
Effective Size= 70.4"W x 45.0"H => 15.33 sf x 7,171 = 110.0 cf
Overall Size= 77.0"W x 45.0"H x 7.501 with 0.33' Overlap
24 Chambers in 4 Rows
Cap Storage= +14.9 cf x 2 x 4 rows = 119.2 cf
4,861 cf Total Available Storage
Storage Group A created with Chamber Wizard
Device
Routing_
Invert
Outlet Devices
#1
Primary
0,00'
18.0" Vert. Orifice/Grate C= 0.600 Limited to weir flow at low heads
#2
Device 1
0.00'
1.5" Vert. Orifice/Grate C= 0.600 Limited to weir flow at low heads
#3
Device 1
2,00'
10.0" Vert. Orifice/Grate C= 0.600 Limited to weir flow at low heads
#4
Device 1
3.00'
3.0' long Sharp -Crested Rectangular Weir 2 End Contraction(s)
0.5' Crest Height
Primary OutFlow Max=1,74 cfs @ 0.15 hrs HW=2.80' (Free Discharge)
=Orifice/Grate (Passes 1.74 cfs of 12.18 cfs potential flow)
A 6
-2=Orifice/G rate (Orifice Controls 0.10 cfs @ 7.97 fps)
-3=Orifi ce/G rate (Orifice Controls 1.64 cfs @ 3.05 fps)
-4=Sharp-Crested Rectangular Weir ( Controls 0.00 cfs)
24

Verner Child Care 1, 25-yr Storm (Post-Const) Rainfall Duration=5 min, 1nten=732in1hr
Prepared by Davis CivilSolutions, PA Printed 3113/2020
,HydroCAD@10.10-3a s/n03655 @2020 HydroCAD Software Solutions LLC Paae. 4
Pond I P: StormTech - Chamber Wizard Field A
Chamber Model = ADS—StormTech, MC-3500 d +Cap (ADS StormTech@ MC-3500 d rev 03/14 with Cap
volume)
Effective Size= 70.4"W x 45.0"H => 15.33 sf x 7.17'L = 110.0 cf
Overall Size= 77.0"W x 45.0"H x 7.50'L with 0.33'Overlap
Cap Storage= +14.9 cf x 2 x 4 rows = 119.2 cf
77.0" Wide + 9.0" Spacing = 86.0" C-C Row Spacing
6 Chambers/Row x 7.17' Long +1.85'Cap Length x 2 = 46.72' Row Length +12.0" End Stone x 2 = 48,72'
Base Length
4 Rows x 77.0" Wide + 9,0" Spacing x 3 + 12.0" Side Stone x 2 = 29.92' Base Width
9.0" Stone Base + 45.0" Chamber Height + 12.0" Stone Cover = 5.50'Field Height
24 Chambers x 110.0 cf + 14,9 cf Cap Volume x 2 x 4 Rows = 2,758.0 cf Chamber Storage
8,016.5 cf Field - 2,758.0 cf Chambers = 5,258.4 cf Stone x 40,0% Voids = 2,103.4 cf Stone Storage
Chamber Storage + Stone Storage = 4,861.4 cf = 0.112 of
Overall Storage Efficiency= 60.6%
Overall System Size = 48.72'x 29.92'x 5.50'
24 Chambers
296.9 cy Field
194.8 cy Stone
E*

Verner Child Care 1, 25-yr Storm (Fast -Coast) Rainfall Duration=5 min, Inten=732inlhr
Prepared by Davis CivilSolutions, PA Printed 3/13/2020
HydroCAD@10.10-3a s/nO3655 @2020 HydroCAD Software Solutions LLC Page 5
w
Discharge (cfs)
�' Primary
31

Verner Child Care 1, 25-yr Storm (Post-Const) Rainfall Duration=5 min, Inten=7.32 inAhr
Prepared by Davis CivilSolutions, PA Printed 3/13/2020
HydroCAD@10.10-3a s/n03655 @2020 HydroCAD Software Sdutions. LLC Page 6
4!
Pond I P. StormTech
'Stage -Area -Storage
III III
. ....... ........... . ... . .. . ... .........
4•
3.
.. . . . .....
2-pXpd
0 -7,
560 60 �O 60
0 1,000
'0 1 0 2 0 2,900 3,600 3,500 4,600 4,500
Storage (cubic -feet)
I® S1�Orage

Verner Child Care 1, 25-yr Storm (Post-Const) Rainfall Durafion=5 min, Inten=7.32 in1hr
Prepared by Davis CivilSolutions, PA Printed 3/13/2020
HydroCAD@10.10-3a s/n03655 @2020 HydroCAD Software Solutions LLG Page 7
Hydrograph for Pond 1P: StormTech
Time
Inflow
Storage
Elevation
Primary
(hours)
(cfs)
(cubic -feet)
(feet)
(cfs)
0.00
0.00
0
0.00
0.00
1.00
0.00
1,901
1.98
0.08
2.00
0.00
1,616
1,74
0,08
3.00
0.00
1,350
1,51
0.07
4.00
0.00
1,104
1.30
0.07
5.00
0.00
876
1,11
0,06
6.00
0.00
668
0,94
0.06
7.00
0.00
478
0.78
0.05
8.00
0.00
313
0,54
0,04
9.00
0.00
186
0,32
0.03
10.00
0.00
98
0.17
0,02
11.00
0.00
48
0,08
0,01
12.00
0.00
28
0.05
UO
13.00
0.00
18
0.03
0.00
14.00
0.00
11
0.02
0,00
15.00
0.00
7
0.01
0,00
16.00
0.00
4
0.01
0.00
17.00
0.00
3
0.00
0.00
1&00
0.00
2
0.00
MO
19.00
0.00
1
0.00
0,00
20.00
0.00
1
0.00
0.00
21.00
0,00
0
0.00
OM
22.00
0,00
0
0.00
MO
23.00
0.00
0
0.00
0.00
24.00
0,00
0
0.00
0.00
25,00
0.00
0
0.00
MO
26.00
0.00
0
0.00
MO
27,00
0,00
0
0.00
OM
28.00
0.00
0
0.00
0.00
MOO
0.00
0
0.00
0.00
30,00
0,00
0
0.00
0.00
31.00
0,00
0
0.00
0.00
32.00
0.00
0
0.00
0.00
33,00
0,00
0
0.00
0.00
34.00
0,00
0
0.00
0.00
35.00
0.00
0
0.00
0.00
36.00
0.00
0
0.00
0.00
37.00
0.00
0
0.00
0.00
38.00
0.00
0
0.00
0.00
39.00
0.00
0
0.00
0.00
40.00
0.00
0
0.00
0.00
41.00
0.00
0
0.00
0.010
42.00
0.00
0
MO
0,00
43.00
0.00
0
MO
0.00
44.00
0.00
0
0.00
0,00
45,00
0.00
0
0.00
0.00
46.00
0.00
0
MO
0.00
47.00
0,00
0
0.00
0.00
48.00
0,00
0
0.00
0.00
49.00
0.00
0
0.00
0.00
50.00
0.00
0
0.00
0.00

Verner Child Care 1, 25-yr Storm (Post-Const) Rainfall Duration=5 min, Inten=7.32 in1hr
Prepared by Davis CivilSolutions, PA Printed 3/13/2020
HydroCAD010.10-3a s/n03655 @2020 HydroCAD Software Solutions LLC Page 8
Elevation Primary
(feet)
(Cfs)
0.00
0.00
0.04
0.00
0.08
0.01
0.12
0.01
0.16
0.02
0.20
0.02
0.24
0.02
0.28
0.03
OM
0.03
0.36
0.03
0.40
0.03
0.44
0.04
0.48
0.04
0.52
0.04
0.56
0.04
0.60
0.04
0.64
0.04
0.68
0.05
0.72
0.05
0.76
0.05
OM
0.05
0.84
0.05
OM
0.05
0.92
0.05
0.96
0.06
1.00
0,06
1.04
0,06
1.08
0.06
1.12
0.06
1.16
0,06
1.20
0.06
1.24
0,06
1.28
0.07
1.32
0.07
1.36
0,07
1.40
0.07
1.44
0.07
1.48
M7
1.52
0.07
1.56
0.07
1.60
0.07
1.64
0.07
1.68
0.08
1.72
0.08
1.76
0.08
1.80
0,08
1.84
0.08
1.88
0.08
1.92
0.08
1.96
0.08
2.00
0.08
2,04
0.09
Stage -Discharge for Pond 1 P: StormTech
Elevation Primary
(feet)
(Cfs)
2.08
0.11
2,12
0.14
2,16
0.19
2.20
0.24
2,24
0.30
2,28
0.38
2.32
0.46
2,36
0.55
2,40
0.65
2.44
0.75
2,48
0.86
2,52
0.97
2.56
1.09
2,60
1.20
2,64
1.32
2.68
1.43
2,72
1.54
2.76
1.65
2.80
1.74
2.84
1.81
2.88
1.89
2.92
1.96
2.96
2.04
3.00
2.11
3.04
2.25
3.08
2.47
3.12
2.72
3.16
3.01
3.20
&34
3.24
&69
3.28
4.07
3.32
4.48
3.36
4.91
3.40
5.36
3.44
5.84
3.48
6.35
3.52
6.87
3.56
7.42
3,60
7.99
3.64
8.58
3,68
9.19
3.72
9,82
3.76
10.47
3.80
11, 15
3.84
11.84
&88
12.56
3.92
13.29
3.96
14.04
4.00
14.82
4.04
15,43
4.08
15.53
4,12
15.62
Elevation Primary
(feet)
(Cfs)
4.16
15.71
4,20
15.80
4,24
15.90
4.28
15.99
4,32
16.08
4.36
16.17
4.40
16.26
4,44
16.34
4,48
16.43
4.52
16.52
4.56
16.61
4,60
16.70
4.64
16.78
4,68
16.87
4,72
16.95
4.76
17.04
4.80
17.12
4.84
17,21
4.88
17.29
4.92
17,38
4.96
17,46
5.00
17.54
5.04
17,62
5.08
17,71
5.12
17.79
5.16
17,87
5.20
17.95
5.24
18.03
5.28
18.11
5.32
18.19
5.36
18.27
5.40
18.35
5.44
18.43
5.48
18.51
ul

Verner Child Care 1, 25-yr Storm (Post-Const) Rainfall Duration=5min, Inten=7,32inlhr
Prepared by Davis CivilSolutions, PA Printed 3/13/2020
HydroCAD@10.10-3a s/n03655 @2020 HydroCAD Software Solutions LLC Page 9
Elevation
Storage
(feet)
(cubic -feet)
MO
0
0.04
23
0.08
47
0,12
70
0.16
93
0,20
117
0,24
140
0.28
163
0,32
187
0,36
210
0.40
233
0.44
257
0.48
280
0.62
303
0,56
326
0,60
350
0.64
373
0.68
396
0.72
420
0.76
449
0.80
498
0.84
547
0.88
595
0.92
643
0,96
692
1.00
740
1.04
788
1.08
836
1.12
884
1.16
932
1.20
980
1.24
1,028
1.28
1,076
1.32
1,123
1.36
IIJ71
1.40
1,219
1.44
1,266
1.48
1,313
1.52
1,360
1.56
1,408
1.60
1,455
1.64
1,501
1,68
1,548
1.72
1,595
1.76
1,641
1.80
1,688
1.84
1,734
1.88
1,781
1.92
1,827
1.96
1,873
2.00
1,919
2.04
1,964
Stage -Area -Storage for Pond I P: StormTech
Elevation
Storage
(feet)-
(cubic -feet)
2.08
2,010
2.12
2,055
2.16
2,101
2.20
2,146
2.24
2,191
2.28
2,236
2.32
2,281
2.36
2,325
2.40
2,370
2.44
2,414
2.48
2,458
2.52
2,502
2.56
2,546
2.60
2,589
2.64
2,633
2.68
2,676
2.72
2,719
2.76
2,762
2.80
2,804
2.84
2,846
2.88
2,889
2.92
2,931
2.96
2,972
3.00
3,014
3.04
3,055
3,08
3,096
112
3,137
3,16
3,177
3.20
3,217
3.24
3,257
3,28
3,297
3,32
3,336
3.36
3,375
3,40
3,414
3.44
3,452
3.48
3,490
3,52
3,528
3.56
3,565
3.60
3,602
3.64
3,639
3.68
3,675
3.72
3,711
3.76
3,746
180
3,781
184
3,815
&88
3,849
192
3,882
196
3,915
4.00
3,946
4.04
3,977
4.08
4,008
4.12
4,037
Elevation
Storage
(feet)
(cubic -feet)
4,16
4,065
4.20
4,092
4.24
4,118
4.28
4,144
4.32
4,169
4.36
4,194
4.40
4,219
4.44
4,243
4.48
4,267
4.52
4,290
4.56
4,313
4.60
4,337
4,64
4,360
4.68
4, 383
4.72
4,407
4,76
4,430
4,80,
4,453
4.84
4,477
4,88
4,500
4.92
4,523
4.96
4,547
5.00
4,570
5.04
4,593
5.08
4,617
5.12
4,640
5.16
4,663
5.20
4,687
5.24
4,710
5.28
4,733
5.32
4,756
5.36
4,780
5.40
4,803
5.44
4,826
5.48
4,850

Verner Child Care 2, 1-yr Storm (Pre-Const) Rainfall Duration=5 min, Inten=3,95 in1hr
Prepared by Davis CivilSolutions, PA Printed 3/13/2020
HydroCAD@110.10-3a s/n03655 @2020 HydroCAD Software Solutions LLC Page 1
Summary for Subcatchment IS: Runoff
Verner Child Care 2, 1 -yr. Storm Event (Pre -Construction)
Runoff = 0.50 cfs @ 0.08 hrs, Volume= 155 cf, Depth= 0.08"
Runoff by Rational method, Rise/Fall=1.0/1.0 xTc, Time Span= 0.00-3.00 hrs, dt= 0.01 hrs
Rainfall Duration=5 min, Inten=3,95 in/hr
Area (ac) C Description
0.520 025 Woodlands
0.520 100.00% Pervious Area
Tc Length Slope Velocity Capacity Description
(min) (feet) (ft/ft) (ft/sec) (cfs)
5.0 Direct Entry,
Subcat�chment IS: Runoff
Hydrograpih
Rainfall
---- -- Duration=5min,
3._9in/_hr__
--,..Runofll-,Area=0.520--ac---
I
---Runoff! Volume=l 55--cf
0

Verner Child Care 2, 1 -yr Storm (Pre-Const) Rainfall Duration=5 min, Inten=3,95 in1hr
Prepared by Davis CivilSolutions, PA Printed 3/13/2020
HydroCAD@10.10-3a s/n03655 @2020 HydroCAD Software Solutions ILLC Page 2
Time Runoff
(hours) (cf S)
0.00 0.00
0,0,2 0,12
0.04 0.25
0.06 0.37
0.08 0.50
0.10 0.41
0.12 0.29
0,14 0,17
0.16 0.04
OA8 0.00
0,20 0.00
0.22 0,00
0.24 0.00
0,26 0.00
0.28 0,00
0,30 0.00
0.32 0,00
0.34 0.00
0.36 0.00
0.38 0.00
0.40 0.00
0.42 0.00
0.44 0.00
0.46 0.00
0.48 0.00
0.50 0.00
0.52 0.00
0.54 0.00
0.56 0.00
0.58 0.00
0.60 0.00
0.62 0.00
0.64 0.00
0.66 0.00
0.68 0.00
0.70 0.00
0.72 0.00
0.74 0.00
0.76 0.00
0.78 0.00
OM 0.00
0,82 0,00
0.84 0.00
0,86 0,00
0.88 0.00
0.90 0.00
0.92 OM
0.94 OM
0.96 01-00
0.98 0,00
1.00 OM
1.0,2 0.00
Hydrograph for Subcatchme,nt 1 S. Runoff
Time Runoff
(hours) (cfs)
1.04 0.00
1.06 0.00
1,08 0.00
1AO 0.00
1,12 0.00
1.14 0.00
1.16 0.00
1,18 0.00
1.20 0.00
1.22 0.00
1,24 0.00
1.26 0.00
1.28 0.00
1.30 0.00
1,32 0.00
1.34 0.00
1.36 0.00
1.38 0.00
1.40 0.00
1.42 0.00
1.44 0,00
1.46 0.00
1.48 0.00
1.50 0,00,
1.52 0.00
1.54 0.00
1.56 0,00
11.58 0.00
1.60 0.00
1,62 0,00
1.64 0.00
1.66 0.00
1.68 0,00
1.70 0,00
1.72 0.00
1,74 0,00
1.76 0,00
1.78 0.00
1.80 0.00
1.82 0.00
1.84 0.00
1.86 OM
1.88 0.00
1.90 0.00
1.92 0.00
1.94 0.00
1.96 0,00
1.98 0.00
2.00 0.00
2.02 0.00
2.04 0.00
2.06 0.00
Time Runoff
(hours)
(cfs)
2.08
0.00
2.10
UO
2A2
OM
2.14
0.00
2.16
0,00
2,18
0.00
2.20
0.00
2.22
0,00
2,24
0.00
2.26
0.00
2.28
0,00
2.30
UO
2.32
MO
2.34
0,00
2.36
MO
2.38
0.00
2.40
OM
2.42
OM
2.44
0.00
2.46
0.00
2.48
0.00
2.50
OM
2.52
0.00
2.54
OM
2.56
0.00
2.58
0.00
2.60
OM
2.62
0.00
2.64
0.00
2.66
OM
2.68
0.00
2.70
0.00
2,72
0,00
2.74
0.00
2.76
0.00
2.78
0.00
2.80
0.010
2.82
0.00
2.84
0.00
2.86
0.00
2.88
0.00
2.90
0.00
2.92
0.00
2.94
0.00
2.96
0,00
2.98
0.00
3,00
0,00
M

Verner Child Care 2, I-yr Storm (Post-Const) Rainfall Duration=5 min, Inten=3.95 in1hr
Prepared by Davis CivilSolutions, PA Printed 3/13/2020
HydroCAD@10,10-3a s/n03655 @2020 HydroCAD Software Solutions LLC Page 1
Summary for Subcatchment IS: Runoff
Verner Child Care 2, 1 -yr Storm (Post -Construction)
Runoff 1.80 cfs @ 0.08 hrs, Volume= 0.013 af, Depth= 0.30"
Runoff by Rational method, Rise/Fall=1.0/1,0 xTc, Time Span= 0,00-50.00 hrs, dt= 0.01 hrs
Rainfall Duration=5 min, Inten=3.95 in/hr
Area (ac) C Dtsl �riflon
0.520 0.90 Pavement
0,520 100.00% Pervious Area
Tc Length Slope Velocity Capacity Description
(min) (j2�ttL (ftift) (ft/sec) (cfs)
5.0 220 0.73 Direct Entry, Tc Entered Directly
4 .
23:
LL
Subcatchment IS: Runoff
Hydrograph
...... ... .... . . . . . .
2-
I M cf.%
j ���nfa
uratiqin=5 ir
I ten ' 3.�99 i /hr
Ru ioff il%r'ezll= ri 0 a,
0�
V
U�Oif De t =0. 1 0'
�j
F Ow Leh th� i �2�
Tq= 5. T n
c,l II
C!O 91
-- ----- -----
map"
0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48 50
Time (hours)
0

Verner Child Care 2, 1-yr Storm (Post -Coast) Rainfall Duration=5 min, Inten=3.95 in1hr
Prepared by Davis CivilSolutions, PA Printed 3/13/2020
HydroCAD@10.10-3a s/n03655 @2020 HydroCAD Software Solutions LLC Page 2
Time Runoff
(hours) (cfs)
0.00 0.00
0.50 0.00
1.00 0.00
1.50 0.00
2.00 0.00
2.50 0.00
100 MO
3.50 0.00
4.00 0.00
4.50 0.00
5.00 0.00
5.50 0.00
6.00 0.00
6.50 0.00
7.00 0.00
7.50 0.00
8.00 0.00
8.50 0.00
9,00 0.00
9,50 0.00
10.00 0.00
10,50 0.00
11,00 0.00
11.50 0.00
12,00 0.00
12.50 0.00
1100 0.00
13.50 0.00
14.00 0.00
14.50 0,00
15.00 0.00
15.50 0.00
16.00, 0.00
16.50 0.00
17.00 0.00
17.50 0.00
18,00 0.00
18,50 0.00
19.00 0.00
19,50 0.00
20.00 0-00
20.50 01.00
21.00 MO
21.50 OM
22.00 MO
22,50 0.00
23.00 0.00
23,50 0.00
24.00 0.00
24.50 0.00
25.00 0.00
25.50 0.00
Hydrograph for Subcatchment 1S: Runoff
Time Runoff
(hours) (cfs)
26.00 0,00
26.50 0.00
27.00 0,00
27.50 0,00
28.00 MO
2&50 0,00
29.00 0,00
29.50 0.00
30.00 0,00
30.50 0.00
31.00 0.00
31.50 0,00
32.00 0,00
32.50 0.00
3100 MO
33.50 MO
34.00 0.00
34.50 0,00
35.00 0.00
35.50 0.00
36.00 0.00
36.50 0.00
37.00 0.00
37.50 0.00
38.00 0.00
38.50 0.00
39.00 0.00
39.50 MO
40.00 0.00
40,50 0.00
41.00 0.00
41.50 0.00
42.00 0.00
42.50 0.00
43,00 0.00
43.50 0.00
44.00 0.00
44.50 0.00
45.00 0.00
45.50 0.00
46.00 0.00
46.50 0.00
47.00 0.00
47.50 0.00
48.00 0.00
48.50 0.00
49.00 0.00
49.50 MO
50.00 0.00

Verner Child Care 2, 1-yr Storm (Post-Const) Rainfall Duration=5 min, Inten=3.95 in1hr
Prepared by Davis CivilSolutions, PA Printed'! 3/13/2020
HydroCAD810.10-3a s/n03655 @2020 HydroCAD Software Solutions LLC Page 3
Summary for Pond I P: StormTech
StormTech Detention Facility
Inflow Area = 0.520 ac, 0.00% Impervious, Inflow Depth = 0.30"
Inflow 1 80 cfs @ 0.08 hrs, Volume= 0.013 of
Outflow = 0.06 cfs @ 0.17 hrs, Volume= 0.013 af, Atten= 97%, Lag= 5,1 min
Primary 0.06 cfs @ 0.17 hrs, Volurne= 0.013 of
Routing by Stor-Ind method, Time Span= 0.00-50.00 hrs, dt= 0.01 hrs
Peak Elev= 0.97' @ 0.17 hrs Surf.Area= 1,108 sf Storage= 536 cf
Plug -Flow detention time= 107.3 min calculated for 0.013 of (100% of inflow)
Center -of -Mass det. time= 107.1 min ( 112.1 - 5.0 )
Volume Invert Avail.Storage Storage Description
#1A 0.00, 1,611 cf 22.75'W x 48.72'L x 5.50'H Field A
6,096 cf Overall - 2,069 cf Embedded = 4,028 cf x 40,0% Voids
#2A 0. 75' 2,069 cf ADS StormTech MC-3500 d +Cap x 18 Inside #1
Effective Size= 70.4"W x 45.0"H => 15.33 sf x 7.171 = 110.0 cf
Overall Size= 77.0"W x 45,0"H x 7.501 with 0.33'Overlap
18 Chambers in 3 Rows
Cap Storage= +14.9 cf x 2 x 3 rows = 89A cf
3,680 cf Total Available Storage
Storage Group A created with Chamber Wizard
Device
Routing
Invert
Outlet Devices
#1
Primary
0.00'
18.0" Vert. Orifice/Grate C= 0.600 Limited to weir flow at low heads
#2
Device 1
0.00'
1.5" Vert. Orifice/Grate C= 0.600 Limited to weir flow at low heads
#3
Device 1
1. 00'
8.0" Vert. Orifice/Grate C= 0.600 Limited to weir flow at low heads
#4
Device 1
2. 00'
3.0' long Sharp -Crested Rectangular Weir 2 End Contraction(s)
05 Crest Height
Primary OutFlow Max=0.06 cfs @ 0.17 hrs HW=0.97' (Free Discharge)
=Orifice/Grate (Passes 0.06 cfs of 4.07 cfs potential flow)
-2=Orifice/Grate (Orifice Controls 0.06 cfs @ 4.59 fps)
-3=Orifice/Grate ( Controls 0.00 cfs)
-4=Sharp-,Crested Rectangular Weir ( Controls 0.00 cfs)
MR

Verner Child Care 2, 1-yr Storm (Post-Gonst) Rainfall Duration=5 min, Inten=3.95 in1hr
Prepared by Davis CivilSolutions, PA Printed 3/13/2020
HydroCAD@10.10-3a s/n03655 @2020 HydroCAD Software Solutions LLC Page 4
Pond 1 P: StormTech - Chamber Wizard Field A
Chamber Model = ADS—StormTech MC-3500 d +Cap (ADS StormTech@ MC-3500 d rev 03/14 with Cap
volume)
Effective Size= 70.4"W x 45.0"H => 15.3,3 sf x 7.171 = 110.0 cf
Overall Size= 77.0"W x 45.0"H x 7.501 with 0.33'Overlap
Cap Storage= +14.9 cf x 2 x 3 rows = 89.4 cf
77.0" Wide + 9.0" Spacing = 86.0" C-C Row Spacing
6 Chambers/Row x 7.17' Long +1.85' Cap Length x 2 = 46.72' Row Length +12,0" End Stone x 2 = 48.72'
Base Length
3 Rows x 77.0" Wide + 9.0" Spacing x 2 + 12.0" Side Stone x 2 = 22.75' Base Width
9.0" Stone Base + 45.0" Chamber Height + 12.0" Stone Cover = 5.50'Field Height
18 Chambers x 110.0 cf + 14.9 cf Cap Volume x 2 x 3 Rows = 2,068.5 cf Chamber Storage
6,096.1 cf Field - 2,068.5 of Chambers = 4,027.6 cf Stone x 40.0% Voids = 1,611,0 cf Stone Storage
Chamber Storage + Stone Storage = 3,679.6 cf = 0.084 of
Overall Storage Efficiency = 60A%
Overall System Size = 48.72'x 22.75'x 5.50'
18 Chambers
225.8 cy Field
149.2 cy Stone
Z

Verner Child Care 2, 1-yr Storm (Post-Const) Rainfall Duration=5 min, Inten=3.95 in1hr
Prepared by Davis CivilSolutions, PA Printed 3/13/2020
HydroCADO 10-10-3a s/n 03655 C 2020 HydroCAD Software Solutions LLC Page 5
M Infl
El Primary ow
i
4r
9
U-
0

Verner Child Care 2, 1-yr Storm (Post-Const) Rainfall Duration=5 min, Inten=3,95 in1hr
Prepared by Davis CivilSolutions, PA Printed 3/13/2020
HydroCADOIO.10-3a s/n03655 @2020 HydroCAD Software Solutions LLC Page 6
4!
U
Pond, 1 P: StormTech
Stage -Area -Storage
5-
4-
3
2-
_10410 WhIM ift
0 �All �t
0 500 1,000 1,500 2,000 2,500 3,dOO' 3,500
Storage (cubic -feet)

Verner Child Care 2, 1-yr Storm (Post-Cons,t) Rainfall Duration=5 min, Inten=3, 95 in1hr
Prepared by Davis CivilSolutions, PA Printed 3/13/2020
HydroCADO 10.10-3a s/n 03655 @ 2020 HydroCAD Software Solutions LLC Page 7
Hydrograph for Pond 1 P: StormTech
Time
Inflow
Storage
Elevation
Primary
(hours)
(cfs)
(cubic -feet)
(feet)
(cfs)
0.00
0.00
0
0.00
0.00
1.00
0.00
376
0.80
0.05
2.00
0,00
214
0,48
0.04
3.00
0,00
102
0,23
0.02
4.00
0.00
41
0.09
0.01
5.00
0,00
20
0,05
0.00
6.0,0
0,00
11
0.02
0.00
7.00
0.00
6
0.01
0.00
8.00
0,00
3
0.01
0.00
9.00
UO
2
0.00
0.00
10.00
0.00
1
0.00
0.00
11.00
0,00
1
0,00
0.00
12.00
0,00
0
0.00
0.00
13.00
0.00
0
0.00
0.00
14.00
0,00
0
0,00
MO
15.00
0.00
0
0,00
0.00
16.00
0.00
0
0.00
0.00
17M
0.00
0
0.00
0.00
18.00
0.00
0
0.00
0.00
19.00
0.00
0
0.00
0.00
20.00
0.00
0
0.00
0.00
21.00
MO
0
0.00
0.00
22,00
0.00
0
0.00
0,00
23.00
0.00
0
0.00
0.00
24.00
0.00
0
0.00
0.00
25.00
0.00
0
0.00
0,00
26,00
0.00
0
UO
0.00
27.00
0.00
0
MO
0.00
28,00
0.00
0
OM
UO
29.00
0.00
0
0.00
MO
30.00
0.00
0
0.00
0.00
31.00
0.00
0
0.00
UO
32.00
0.00
0
0.00
0,00
33.00
0.00
0
0.00
0.00
34.00
UO
0
0.00
0,00
35.00
0.00
0
0.00
0,00
36.00
0.00
0
0.00
0.00
37.00
0.00
0
0.00
0,00
38.00
0.00
0
0.00
0.00
39.00
0.00
0
0,00
0.00
40.00
0.00
0
0.00
0.00
41.00
0,00
0
0.00
0.00
42.00
0.00
0
0.00
0.00
43,00
0.00
0
0.00
0.00
44.00
0.00
0
OM
0.00
45.00
0.00
0
OM
0,00
46.00
0.00
0
0.00
0,00
47.00
0.00
0
MO
0.00
48.00
0.00
0
0.00
0.00
49.00
0,00
0
0,00
0.00
50.00
0.00
0
0.00
0.00

Verner Child Care 2, 1-yr Storm (Post-Const) Rainfall Duration=5 min, Inten=3.95 in1hr
Prepared by Davis CivilSolutions, PA Printed 3/13/2020
HydroCAD@10.10-3a s/n03655 @2020 HydroCAD Software Solutions LLC Page 8
Elevation Primary
(feet)
(Cfs)
OM
0,00
0.04
0.00
0.08
0.01
0.12
OV
0.16
0.02
0.20
0.02
0.24
0,02
0.28
0.03
0.32
0.03
0.36
0,03
OAO
0.03
0.44
0.04
0.48
0.04
0.52
0.04
0.56
0.04
0.60
0.04
0.64
0.04
0.68
0.05
0,72
0.05
0.76
0.05
0.80
0.05
0,84
0.05
0,88
0.05
0.92
0.05
0,96
0.06
1.00
OM
1.04
0.06
1.08
0.08
1.12
OAI
1.16
0.15
1.20
0.20
1,24
0.25
1.28
0.32
1.32
0.39
1.36
0,46
1.40
0.54
1,44
0.62
1.48
0.71
1.52
0.79
1.56
0.87
1.60
0.95
1.64
1.01
1.68
1.06
1.72
1.12
1.76
1.17
1.80
1.23
1.84
1.28
1.88
1.32
1.92
1.37
1.96
1.41
2.00
1,45
2.04
1.58
Stage -Discharge for Pond 1 P: StormTech
Elevation Primary
(feet)
(Cfs)
2.08
1.76
2.12
1.99
2.16
2.26
2.20
2.56
2.24
2.89
2.28
3.25
2.32
3.63
2.36
4,04
2.40
4.48
2.44
4.94
2.48
5.42
2.52
5.93
2.56
6.45
2.60
7.01
2.64
7.58
2.68
8.17
2.72
&79
2.76
9.42
2.80
10.08
2.84
10.76
2.88
11.45
2.92
12.17
2.96
12,65
3.00
12.76
3.04
12.88
3.08
12,99
3.12
11110
3.16
13.21
3.20
1132
3.24
13.43
3.28
13.53
3.32
13,64
3.36
13.75
3.40
13.85
3.44
13,96
3.48
14.06
3.52
14A6
3.56
114.26
3.60
14.36
3.64
14.46
3.68
14.56
3.72
14.66
3.76
14.76
3,80
14.86
3.84
14.96
3.88
15.05
3.92
15.15
3.96
15.24
4.00
15.34
4.04
15.43
4.08
15.53
4,12
15.62
Elevation Primary
(feet)
(Cfs)
4.16
15,71
4.20
15.80
424
15.90
4.28
15.99
4,32
16.08
4.36
16.17
4,40
16.26
4,44
16.34
4.48
16.43
4,52
16.52
4,56
16.61
4.60
16.70
4,64
16,78
4.68
16.87
4.72
16.95
4.76
17,04
4.80
17.12
4.84
17.21
4.88
17,29
4.92
17,38
4.96
17.46
5.00
17.54
5.04
17.62
5.08
17.71
5.12
17.79
5.16
17.87
5.20
17.95
5.24
18.03
5.28
18.11
5,32
18.19
5.36
18.27
5.40
18.35
5,44
18.43
5.48
18.51
M

Verner Child Care 2, 1 -yr Storm (Post-Const) Rainfall Duration=5 min, Inten=3.95 in1hr
Prepared by Davis CivilSolutions, PA Printed 3/13/2020
HydroCADO 10.10-3a s/n 03655 @ 2020 HydroCAD Software Solutions LLC Page 9
Elevation
Storage
(feet)
(cubic -feet)
0.00
0
0.04
18
0.08
35
0.12
53
0.16
71
0.20
89
0.24
106
0.28
124
0.32
142
0.36
160
0.40
177
0.44
195
0.48
213
0.52
231
0.56
248
0.60
266
0.64
284
0.68
301
0.72
319
0.76
342
0.80
378
0.84
415
0.88
452
0.92
488
0.96
525
1.00
561
1.04
598
1.08
634
1.12
670
1.16
706
1.20
743
1.24
779
1.28
815
1.32
851
1.36
887
1.40
922
1.44
958
1.48
994
1.52
1,030
1.56
1,065
1,60
1,101
1,64
1,136
1.68
1,171
1,72
1,207
1.76
1,242
1.80
1,277
1.84
1,312
1.88
1,347
1.92
1,382
1,96
1,416
2.00
1,451
2,04
1,486
Stage -Area -Storage for Pond 1 P: StormTech
Elevation
Storage
(feet)
(cubic -feet)
2.08
1,520
2.12
1,554
2.16
1,589
2.20
1,623
2.24
1,657
2.28
1,691
2.32
1,725
2.36
1,758
2.40
1,792
2.44
1,825
2.48
1,859
2.52
1,892
2.56
1,925
2.60
1,958
2.64
1,990
2.68
2,023
2.72
2,056
2.76
2,088
2.80
2,120
2.84
2,152
2.88
2,184
2.92
2,216
2.96
2,247
3.00
2,279
3.04
2,310
3.08
2,341
3.12
2,371
3.16
2,402
3.20
2,432
3.24
2,463
3.28
2,493
132
2,522
3.36
2,552
3.40
2,581
144
2,610
148
2,639
152
2,667
156
2,696
160
2,724
3.64
2,751
3.68
2,779
3.72
2,806
3.76
2,832
3.80
2,859
3.84
2,885
3.88
2,910
3.92
2,935
3.96
2,960
4.00
2,,984
4.04
3,008
4,08
3,031
,4.12
3,053
Elevation
Storage
(feet)
(cubic -feet)
4.16
3,074
4.20
3,094
4.24
3,114
4,28
3,134
4.32
3,,153
4.36
3,172
4,40
3,191
4.44
3,209
4.48
3,227
4,52
3,245
4.56
3,263
4.60
3,281
4.64
3,298
4,68
3,316
4.72
3,334
4.76
3,351
4.80
3,369
4.84
3,387
4.88
3,405
4.92
3,422
4.96
3,440
5.00
3,458
5.04
3,476
5.08
3,493
5.12
3,511
5.16
3,529
5.20
3,547
5.24
3,564
5.28
3,582
5.32
3,600
5.36
3,617
5.40
3,635
5.44
3,653
5.48
3,671
AM,

Verner Child Care 2, 1 0,-yr Storm (Pre-Const) Rainfall Duration=5 min, Inten=6.37inlhr
Prepared by Davis CivilSolutions, PA Printed 3/13/2020
HydroCAD@10.10-3a s/n03655 @2020 HydroCAD Software Solutions LLC Page 1
Summary for Subcatchment IS: Runoff
Verner Child Care 2, 10-yr Storm (Pre -Construction)
Runoff = 0,81 cfs @ 0.08 hrs, Volume= 0.006af, Depth= 0.13"
Runoff by Rational method, Rise/Fall=1.0/1.0 xTc, Time Span= 0.00-3.00 hrs, dt= 0.01 hrs
Rainfall Duration=5 min, Inten=6.37 in/hr
Area (ac) C Description
0.520 0.25 Woodlands
0.520 100, 00% Pervious Area
Tc Length Slope Velocity Capacity Description
(min) (feet ft/ft) (ft/sec) cfs)
5.0 220 0.73 Direct Entry, Tc Entered Directly
Subcatchment IS: Runoff
Hydrograph
1=1
Time (hours)
M
wM

Verner Child Care 2, 10-yr Storm (Pre-Const) Rainfall Duration=5 min, Inten=6.37 in1hr
Prepared by Davis CivilSolutions, PA Printed 3/13/2020
HydroCADO 10.10-3a s/n 03655 @ 2020 HydroCAD Software Solutions LLC Page 2
Time Runoff
hours) (cfs)
0,00 0.00
0.02 0.20
0.04 0.40
0.06 0.60
0,.08 0.80
0,10 0,67
0,12 0.47
0.14 0.27
0,16 0.07
0,18 0.00
0.20 0.00
0,22 OM
0.24 0.00
0.26 OM
0,28 0.00
0,30 0.00
0.32 0.00
0.34 0,00
0.36 0,00
0.38 0.00
0.40 0,00
0.42 0.00
0.44 0.00
0.46 0.00
0.48 0.00
0.50 0.00
0.52 0.00
0.54 0.00
0.56 0.00
0.58 0.00
0.60 0.00
0.62 0.00
0.64 0.00
0.66 0.00
0.68 0.00
0.70 0.00
0.72 OM
0.74 OM
0.76 0.00
078 0.00
0.80 0.00
0.82 0,00
0,84 0.00
0.86 0.00
0,88 0,00
0.90 OM
0.92 0.00
0.94 0,00
0.96 0.00
0.98 0,00
1.00 0.00
1.02 0.00
Hydrograph for Subcatchment 1 S: Runoff
Time Runoff
(hours) (cfs)
1.04 0.00
1.06 0.00
1.08 0.00
1.10 0.00
1.12 0.00
1.14 0.00
1.16 0.00
1.18 OM
1.20 0.00
1.22 OM
1,24 0.00
1.26 0.00
1.28 0.00
1.30 0.00
1.32 0.00
1.34 0.00
1.36 0,00
1.38 0,00
1.40 0.00
1.42 0.00
1.44 0.00
1.46 0.00
1.48 0.00
1.50 0.00
1.52 0.00
1.64 0.00
1.56 0.00
1,58 0.00
1.60 0.00
1,62 0.00
1.64 0.00
1.66 0.00
1,68 0.00
1.70 0.00
1.72 0.00
1,74 0.00
1.76 0.00
1.78 0.00
1.80 0.00
1.82 0.00
1.84 0.00
1.86 0.00
1.88 0.00
1.90 0,00
1.92 0.00
1.94 0.00
1,96 0.00
1.98 0.00
2.00 OM
2.02 0.00
2.04 0.00
2.06 0.00
Offal �TWMITM
(hours_
(cfs)
2.08
0.00
2.10
0.00
2.12
0.00
2.14
0,00
2.16
0.00
2.18
0.00
2.20
0.00
2.22
0.00
2.24
0.00
2.26
0.00
228
0.00
2.30
0.00
2.32
0,00
2.34
0.00
2.36
0.00
2.38
0,00
2.40
0,00
2.42
0.00
2.44
0.00
2,46
0.00
2.48
MO
2.50
0.00
2,52
0.00
2.54
0.00
2.56
0.00
2.58
0.00
2.60
0.00
2.62
0.00
2.64
0.00
2.66
0.00
2.68
0.00
2.70
0.00
2.72
0.00
2.74
0.00
2.76
0.00
2.78
0.00
2.80
0.00
2,82
0.00
2,84
0.00
2.86
0.00
2.88
0,00
2.90
0.00
2.92
0.00
2.94
0.00
2.96
0.00
2.98
0.00
3.00
0.010

Verner Child Care 2, 10-yr Storm (Post-Const) Rainfall Duration=5 min, Inten=6,37 in1hr
Prepared by Davis CivilSolutions, PA Printed 3/13/2020
HydroCAD@ 10.10-3a s/n 03655 @ 2020 HydroCAD Software Solutions LLC Page 1
Summary for Subcatchment IS: Runoff
Verner Child Care 2, Detention, 1 0-yr. Storm (Post -Construction)
Runoff 2.90 cfs @ 0,08 hrs, Volume= 0.021 af, Depth= 0.48"
Runoff by Rational method, Rise/Fall=1.0/1.0 xTc, Time Span= 0.00-50.00 hrs, dt= 0,01 hrs
Rainfall Duration=5 min, lnten=6.37 in/hr
Area (ac) C Description
0.520 0,90 Pavement
0.520 100. 00% Pervious Area
Tc Length Slope Velocity Capacity Description
(min) (feet) (ft/ft) (ft/sec) (cfs)
5.0 Direct Entry, Tc entered directly
LL
MO,

Verner Child Care 2, 10-yr Storm (Post-Const) Rainfall Duration=5 min, Inten=6.37 in1hr
Prepared by Davis CivilSolutions, PA Printed 3/13/2020
HydroCADO 10.10-3a s/n 03655 @ 2020 HydroCAD Software Solutions LLC Page 2
Time Runoff
(hours) (cfs)
0.00 0100
0.50 0.00
1.00 0.00
1.50 0.00
2.00 0,00
2.50 0.00
100 0.00
3.50 0.00
4.00 0.00
4,50 0.00
5.00 0,00
5.50 0.00
6.00 0,00
6.50 0,00
7.00 0.00
7,50 0,00
8.00 0.00
&50 0.00
9.00 0.00
9.50 0.00
10.00 0.00
10.50 0.00
11.00 0.00
11.50 0.00
12.00 0.00
12.50 0.00
13.00 0.00
13.50 0.00
14.00 0.00
14.50 0.00
15.00 0.00
15.50 0.00
16.00 0.00
16.50 0.00
17.00 0.00
17.50 0.00
18-00 0.00
18.50 0.00
19.00 0.00
19.50 0,010
20,00 0.00
20.50 0.00
21.00 0,00
21.50 0.00
22.00 0.00
22.50 0.00
2100 0.00
23.50 0.00
24.00 0.00
24.50 0.00
25,00 0,00
25.50 0.00
Hydrograph for Subcatchment IS: Runoff
Time Runoff
(hours) (cfs)
26-00 0.00
26.50 0.00
27.00 0.00
27.50 0.00
28.00 0.00
28.50 0.00
29-00 0-00
29.50 0.00
30.00 0.00
30,50 0.00
31.00 0.00
31.50 0.00
32.00 0.00
32.50 0.00
33.00 0.00
33-50 0.00
34.00 0.00
34.50 0.00
35-00 0.00
35.50 0.00
36.00 0.00
36.50 0.00
37.00 0.00
37.50 0,00
38.00 0.00
3&50 0,00
39.00 0,00
39.50 0.00
40.00 0,00
40.50 0,00
41.00 0.00
41.50 0,00
42.00 0,00
42.50 0.00
43,00 0,00
43.50 0,00
44.00 0.00
44.50 0.00
45.00 0.00
45.50 0.00
46.00 0.00
46.50 0.00
47.00 0.00
47.50 0.00
48.00 0.00
48,50 0,00
49.00 0,00
49.50 0.00
50,00, 0.00
r--"A
LUF

Verner Child Care 2, 10-yr Storm (Post-Const) Rainfall Duration=5 min, Inten=6.37 in1hr
Prepared by Davis CivilSolutions, PA Printed 3/13/2020
HydroCAD@10.10-3a s/n03655 02020 HydroCAD Software Solutions LLC Page 3
Summary for Pond 1P: Detention Facility (H)
StormTech Detention Facility
Inflow Area = 0.520 ac, 0,00% Impervious, Inflow Depth = 0,48"
Inflow 2.90 cfs @ 0.08 hrs, Volurne= 0M1 of
Outflow 0.35 cfs @ 0.16 hrs, Volume= 0.021 af, Atten= 88%, Lag= 4.5 min
Primary 0,35 cfs @ 0.16 hrs, Vo,lume= 0.021 of
Routing by Stor-Ind method, Time Span= 0.00-50.00 hrs, dt= 0.01 hrs
Peak Elev= 1.30'@ 0,16 hrs Surf.Area=1,108sf Storage= 833 cf
Plug -Flow detention time= 100.2 min calculated for 0.021 of (100% of inflow)
Center -of -Mass clet. time= 100A min ( 105.4 - 5.0 )
Volume Invert Avail.Storage Storage Description
#1A 0.00, 1,611 cf 22.75'W x 48.72'L x 5.50'H Field A
6,096 cf Overall - 2,069 cf Embedded = 4,028 cf x 40.0% Voids
#2A 0. 75' 2,069 cf ADS StormTech MC-3500 d +Cap x 18 Inside #1
Effective Size= 70.4"W x 45,0"H => 15.33 sf x 7.171 = 110.0 cf
Overall Size= 77,0"W x 45.0"H x 7.501 with 0.33'Overlap
18 Chambers in 3 Rows
Cap Storage= +14.9 cf x 2 x 3 rows = 89.4 cf
3,680 cf Total Available Storage
Storage Group A created with Chamber Wizard
Device
Routing
Invert
Outlet Devices
#1
Primary
0.00'
18.0" Vert. Orifice/Grate C= 0.600 Limited to weir flow at low Iheads
#2
Device 1
0.00'
1.5" Vert. Orifice/Grate C= 0.600 Limited to weir flow at low heads
#3
Device 1
1 M'
8.0" Vert. OrificelGrate C= 0.600 Limited to weir flow at low heads
#4
Device 1
2. 00'
3.0' long Sharp -Crested Rectangular Weir 2 End Contraction(s)
0,5' Crest Height
Primary OutFlow Max=0.35 cfs @ 0.16 hrs HW=1.30' (Free Discharge)
t-1 =Orifice/Grate (Passes 0,35 cfs of 6.31 cfs potential flow)
"-2=Orifice/Grate (Orifice Controls 0.07 cfs @ 5.36 fps)
-3=Orifice/Grate (Orifice Controls 0.28 cfs @ 1.86 fps)
-4=Sharp-Crested Rectangular Weir ( Controls 0.00 cfs)
9

Verner Child Care 2, 10-yr Storm (Post-Gonst) Rainfall Duration=5r-nin, Inten=6.37inlhr
Prepared by Davis CivilSolutions, PA Printed 3113/2020
HydroCADO 10,10-3a s/n 03655 @ 2020 HydroCAD Software Solutions LLC Pa g4
Pond 1 P: Detention Facility (H) - Chamber Wizard Field A
Chamber Model = ADS—StormTech MC-3500 d +Cap (ADS StormTech@) MC-3500 d rev 03/14 with Cap
volume)
Effective Size= 70.4"W x 45,0"H => 15.33 sf x 7.171 = 110.0 cf
Overall Size= 77.0"W x 45.0"H x 7.501 with 0.33'Overlap
Cap Storage= +14.9 cf x 2 x 3 rows = 89.4 cf
77.0" Wide + 9.0" Spacing = 86.0" C-C Row Spacing
6 Chambers/Row x 7.17' Long +1.85' Cap Length x 2 = 46.72' Row Length +12.0" End Stone x 2 = 48.72'
Base, Length
3 Rows x 77.0" Wide + 9.0" Spacing x 2 + 12.0" Side Stone x 2 = 22.75' Base Width
9.0" Stone Base + 45.0" Chamber Height + 12.0" Stone Cover = 5,50'Field Height
18 Chambers x 110.0 cf + 14,9 cf Cap Volume x 2 x 3 Rows = 2,068.5 cf Chamber Storage
6,096.1 cf Field - 2,068.5 cf Chambers = 4,027.6 cf Stone x 40.0% Voids = 1,611.0 cf Stone Storage
Chamber Storage + Stone Storage = 3,679.6 cf = 0.084 of
Overall Storage Efficiency = 60.4%
Overall System Size = 48.72'x 22.75'x 5.50'
18 Chambers @ $ 0.00 /ea = $ 0.00
225.8 cy Field Excavation @ $ 0.00 Icy = $ 0.00
149.2 cy Stone @ $ 0.00 /cy = $ 0.00
Total Cost = $ 0,00

Verner Child Care 2, 10-yr Storm (Post-Const) Rainfall Duration=5min, Il5.3701hr
Prepared by Davis Civil Solutions, PA Printed 3/13/2020
HydroCAD@10.10-3a s/n03655 @2020 Hydi Software Solutions LLC Pa 5
Pond 1P: Detention Facility (H)
Hydrograph
11 Inflow
Ej Primary
Time (hours)
Pond IP: Detention Facility (H)
Stag!e-Discharge
5,
4-
3
ENOM"
ill . . . ..... .....
1-10M WON
2,
I W M 10.
0 2 4 8 10 12 14 16 1'8
Discharge ii
29

Verner Child Care 2, 10-yr Storm (Post-Const) Rainfall Duration=5 min, Inten=6,37 in1hr
Prepared by Davis CivilSolutions, PA Printed 3/13/2020
HydroCAD@10.10-3a s/n03655 02020 HydroCAD Software Solutions LLC Pa 6
Pond 1 P: Detention Facility (H)
Stage-Area-Storagie
5
. . . ..... . ..
4-
3
2-
1 AS "AM"Ifflo"M "'IM t"%
0 500 1,000 1,500 2,000 2,500 3,600 3,500
Storage (cubic -feet)
i� Storage
wil

Verner Child Care 2, 10-yr Storm (Post-Const) Rainfall Duration=5 min, Inten=6.37 in1hr
Prepared by Davis CivilSolutions, PA Printed 3/13/2020
HydroCAD010.10-3a s/n03655 @2020 HydroCAD Software Solutions LLC Page 7
Hydrograph for Pond 1P: Detention Facility (H)
Time
Inflow
Storage
Elevation
Primary
hours
(cfs)
(cubic -feet)
(feet)
(cfs)
0.00
0.00
0
0.00
0.00
1.00
0.00
621
0.96
0.06
2.00
0.00
333
0.75
0.05
3.00
0.00
182
0.41
0,03
4.00
0.00
82
0.18
0.02
5.00
0.00
33
0.07
0.01
6.00
0.00
17
0.04
0,00
7.00
0.00
9
0.02
0.00
8.00
0.00
5
0.01
0.00
9.00
0.00
3
0.01
0,00
10.00
0.00
1
0.00
0,00
11.00
0.00
1
0.00
0.00
12.00
0.00
0
0.00
0,00
13.00
0.00
0
0.00
0,00
14.00
MO
Q
0.00
0.00
15.00
0.00
0
0.00
0,00
16.00
0.00
0
0.00
0.00
17.00
0.00
0
0.00
0.00
18,00
0.00
0
OM
UO
19.00
0.00
0
MO
0,00
20.00
0,00
0
0.00
0.00
21.00
10.00
0
0.00
0.00
22.00
OM
0
0.00
0.00
23.00
0,00
0
0.00
0.00
24,00
0.00
0
0.00
0.00
25.00
0,00
0
0,00
0,00
26.00
0.00
0
0.00
0.00
27,00
0.00
0
OM
OM
28.00
0,00
0
0.00
OM
29.00
0.00
0
0.00
0.00
30.00
0.00
0
0,00
0.00
31.00
0.00
0
0.00
0.00
32.00
0.00
0
0.00
0.00
33.00
0.00
0
0,00
0.00
34.00
0.00
0
0,00
0.00
35.00
0.00
0
0.00
0.00
36,00
0.00
0
0,00
0.00
37,00
0,00
0
0.00
0.00
38.00
0,00
0
0.00
0.00
39,00
0.00
0
0.00
0.00
40.00
OM
0
0.00
0.00
41.00
0.00
0
0.00
0.00
42.00
0.00
0
0.00
0.00
43.00
0.00
0
0.00
0.00
44.00
0.00
0
0.00
0.00
45.00
0.00
0
OM
0,00
46.00
0,00
0
0.00
0.00
47,00
0.00
0
0,00
0.00
48.00
0,00
0
0.00
0,00
49.00
0.00
0
0.00
0.00
50.00
0.00
0
0.00
0.00

Verner Child Care 2, 10-yr Storm (Post-Const) Rainfall Duration=5rnin, 1nten=6,37in1hr
Prepared by Davis CivilSolutions, PA Printed 3/1312020
HydroCAD@10.10-3a s/nO3655 @2020 HydroCAD Software Solutions LLC Page 8
Elevation Primary
(feet)
(cf S)
0.00
0.00
0.04
0.00
0.08
0.01
0.12
0.01
0.16
0.02
0.20
OM
0,24
OM
0.28
0.03
0.32
0.03
0.36
0.03
0.40
0.03
0.44
0.04
0.48
0.04
0.52
0.04
0.66
0.04
0.60
0.04
0.64
0.04
0.68
0.05
0.72
0.05
0.76
0,05
0.80
0.05
0.84
0.05
0.88
0.05
0.92
0.05
0,96
0.06
1,00
0,06
1.04
0.06
1.08
0.08
1.12
011
1.16
0.15
1,20
0.20
1,24
0,25
1.28
0.32
1,32
0.39
1.36
0,46
1.40
0.54
1.44
0.62
1.48
0,71
1.52
0.79
1.56
0.87
1.60
0.95
1.64
1.01
1.68
1.06
132
1.12
136
1A7
1,80
1.23
1.84
1.28
1.88
1.32
1.92
1,37
1.96
1.41
2.00
1.45
2.04
1.58
Stage -,Discharge for Pond 1 P: Detention Facility (H)
Elevation Primary
(feet)
(Cfs)
2.08
1.76
2,12
1.99
2.16
2,26
2.20
2,56
2.24
2.89
2,28
3.25
2.32
3,63
2,36
4.04
2,40
4,48
2.44
4.94
2.48
5.42
2,52
5.93
2.56
6,45
2,60
7.01
2.64
7,58
2.68
8.17
2.72
8.79
2.76
9.42
2.80
10.08
2.84
10.76
2.88
11.45
2.92
12.17
2.96
12.65
3.00
12.76
3.04
12.88
3.08
12.99
3.12
13.10
3.16
13.21
3.20
13.32
3,24
13.43
3.28
13.53
3.32
13.64
3.36
13.75
3.40
13,85
3.44
13.96
3.48
14.06
3.52
14.16
3.56
14.26
160
14.36
164
14,46
3.68
14.56
3.72
14.66
3.76
14.76
3,80
14.86
3,84
14,96
3.88
15,05
192
15.15
3.96
1524
4.00
15.34
4.04
15.43
4.08
15.53
4.12
15.62
Elevation Primary
(feet)
ifs)
4,16
15.71
4,20
15.80
4.24
15.90
4,28
15.99
4.32
16.08
4.36
16.17
4.40
16.26
4,44
16.34
4.48
16.43
4,52
16.52
4,56
16.61
4.60
16.70
4.64
16.78
4,68
16.87
4.72
16.95
4,76
17.04
4.80
17.12
4.84
17.21
4.88
17.29
4.92
17.38
4.96
17.46
5.00
17.54
5.04
17,62
5.08
17.71
5.12
17.79
5.16
17.87
5.20
17.95
5.24
18.03
5,28
18,11
5.32
18.19
5.36
18.27
5.40
18.35
5.44
18.43
5.48
18.51
RII

Verner Child Care 2, 10-yr Storm (Post-Const) Rainfall Duration=5 min, Inten=6.37inlhr
Prepared by Davis CivilSolutions, Per Printed 3/13/2020
-HlydroCADO 10. 1 0-3a s/n 03655 @ 2020 HydroCAD Software Solutions LLC Page 9
Stage -Area -Storage for Pond I P: Detention Facility (H)
Elevation
Storage
(feet)
cubic -feet)
0.00
0
0.04
18
0.08
35
0.12
53
0.16
71
0.20
89
0.24
106
0.28
124
0.32
142
U6
160
0.40
177
0.44
195
0.48
213
0.52
231
0.56
248
0.60
266
0.64
284
0.68
301
0.72
319
0.76
342
0,80
378
0.84
415
0.88
452
0,92
488
0.96
525
1.00
561
1.04
598
1,08
634
1.12
670
1,16
706
1.20
743
1.24
779
1.28
815
1.32
851
1.36
887
1,40
922
1.44
958
1.48
994
1,52
1,030
1.56
1,065
1.60
1,101
1.64
1,136
1.68
1,171
1.72
1,207
1.76
1,242
1.80
1,277
1,84
1,312
1.88
1,347
1.92
1,382
1.96
1,416
2.00
1,451
2.04
1,486
Elevation
Storage
(feet)
(cubic -feet)
2.08
1,520
2.12
1,554
2A6
1,589
2.20
1,623
2,24
1,657
2.28
1,691
2.32
1,725
2.36
1,758
2.40
1,792
2.44
1,825
2.48
1,859
2.52
1,892
2.56
1,925
2.60
1,958
2.64
1,990
2.68
2,023
2.72
2,056
2.76
2,088
2.80
2,120
2.84
2,152
2.88
2,184
2.92
2,216
2.96
2,247
3.00
2,279
3.04
2,310
3.08
2,341
3,12
2,371
3,16
2,402
3.20
2,432
3,24
2,463
3.28
2,493
332
2,522
3.36
2,552
3,40
2,581
3.44
2,610
3,48
2,639
3.52
2,667
3.56
2,696
3.60
2,724
3.64
2,751
3.68
2,779
3.72
2,806
3.76
2,832
3.80
2,859
184
2,885
3.88
2,910
3,92
2,935
3.96
2,960
4.00
2,984
4.04
3,008
4.08
3,031
4.12
3,053
Elevation
Storage
(feet)_
(cubic -feet)
4.16
3,074
4.20
3,094
4.24
3,114
4.28
3,134
4.32
3,153
4.36
3,172
4.40
3,191
4.44
3,209
4.48
3,227
4.52
3,245
4.56
3,263
4.60
3,281
4.64
3,298
4.68
3,316
4,72
3,334
4,76
3,351
4.80
3,369
4,84
3,387
4.88
3,405
4,92
3,422
4,96
3,440
5.00
3,458
5.04
3,476
5.08
3,493
5.12
3,511
5.16
3,529
5.20
3,547
5.24
3,564
5.28
3,582
5.32
3,600
5.36
3,617
5.40
3,635
5.44
3,653
5.48
3,671

Verner Child Care 2, 25-yr Storm (Pre-Const) Rainfall Durafion=5 min, Inten=7.32 in1hr
Prepared by Davis CiviiISolutions, PA Printed 3/13/2020
HydroCAD@10.10-3a s/n03655 @2020 HydroCAD Software Solutions LILC Page 1
Summary for Subcatchment 1S: Runoff
Verner Child Care 2, 25-yr Storm (Pre -Construction)
Runoff 0,93 cfs @ 0.08 hirs, Volume= 0.007 af, Depth= 0.15"
Runoff by Rational method, Rise/Fall=1,0/1,0 xTc, Time Span= 0.00-3.00 hirs, dt= 0.01 hirs
Rainfall Duration=5 min, Inten=7.32 in/hr
Area (ac) C. Description
0.520 0.25 Woodlands
0.520 100. 00% Pervious Area
Tc Length Slope Velocity Capacity Description
(min) _ (feet) (ftM) (ft/sec) (cfs)
5.0 220 0.73 Direct Entry, Tc Entered Directly
.2
LL
Subcatchment 1S: Runoff
Hydrograph
0 93 r1s Ii
Rainfall
Duration=5 min,
Inten=7.32 in/hr
Runoff Area=0.520 ac
Run Volume=0.007 of
Zffnoff Depth=0.15"
ow ength=220'
Tc=5.0 min
C=0.25
2 3
Time (hours)
Y� Runoff
M

Verner Child Care 2, 25-yr Storm (Pre-Const) Rainfall Duration=5 min, Inten = 7.32 in1hr
Prepared by Davis CivilSolutions, PA Printed 3113/2020
HydroCAD@10.10-3@ s/n03655 @2020 HydroCAD Software Solutions LLC Page 2
Time Runoff
(hours) (cf S)
0.00 OM
0.02 0.23
0.04 0.46
0.06 0.69
0.08 0.92
0.10 0.77
0.12 0.54
0.14 0.31
0.16 0.08
0.18 0.00
0.20 0.00
0.22 0.00
0.24 0.00
0.26 0.00
0.28 0.00
0.30 0.00
0.32 0.00
0,34 MO
0.36 OM
0.38 0.00
OAO 0.00
0,42 0.00
0.44 0.00
0.46 0.00
0.48 0.00
0.50 0.00
0.52 0,00
0.54 0,00
0.56 0.00
0.58 0,00
0.60 0,00
0.62 0.00
0.64 0,00
0.66 0,00
0.68 0.00
0.70 0,00
0.72 0.00
0.74 0.00
0.76 0.00
0,78 0.00
0.80 0.00
0,82 0.00
0.84 0.00
0.86 0.00
0.88 0.00
0.90 0,00
0.92 OM
0.94 OM
0.96 MO
0.98 OM
1,00 0.00
1.02 0.00
Hydrograph for Subcatchment IS: Runoff
Time Runoff
(hours) (cfs)
1.04 0.00
1.06 0.00
1.08 0.00
1.10 0.00
1.12 0.00
1.14 MO
1.16 0.00
1.18 0,00
1.20 0.00
1.22 0,00
1.24 0,00
1.26 0.00
1.28 0.00
1.30 0.00
1.32 0.00
1.34 0.00
1.36 0.00
1.38 0.00
1.40 0.00
1,42 0.00
1,44 0.00
1.46 0.00
1,48 0.00
1.50 0.00
1.52 0.00
1.54 0.00
1.56 0.00
1.58 0.00
1.60 0.00
1.62 0,00
1.64 0.00
1.66 0,00
1.68 0.00
1.70 0.00
1.72 0,00
1.74 OM
1.76 OM
1.78 0,00
1,80 0.00
1.82 0.00
1,84 &00
1.86 OM
1.88 0.00
1.90 0,00
1.92 0.00
1.94 0,00
1.96 0.00
1.98 0.00
2,00 0.00
2,02 0.00
2.04 0.00
2,06 0.00
Time Runoff
(hours)
(cfs)
2.08
0,00
2.10
0.00
2.12
0,00
214
0,00
2.16
0.00
2.18
0,00
2.20
0,00
2.22
0.00
2.24
0,00
2.26
0.00
2.28
0.00
2.30
0,00
232
0,00
2.34
0.00
2,36
0,00
2,38
0.00
2.40
0.00
2.42
0.00
2.44
0.00
2.46
0.00
2.48
0.00
2,50
0.00
2,52
0.00
2.54
0.00
2,56
0.00
2.58
0.00
2.60
0.00
2.62
0.00
2.64
0.00
2.66
0.00
2.68
0.00
2.70
0.00
2.72
0.00
2.74
0,00
2.76
0.00
2.78
0.00
2,80
0.00
2,82
0.00
2.84
0.00
2,86
0.00
2.88
0.00
2.90
0.00
2.92
0.00
2.94
0.00
2.96
0.00
2.98
0.00
3.00
0,00
&I

Verner Child Care 2, 25-yr Storm (Post-Const)
Prepared by Davis CivilSolutions, PA
HydroCADO 10. 1 0-3a s/n 03655 @ 2020 HydroCAD Softwa
Rainfall Duration=5 min, Inten=7.32 in1hr
Printed 3/13/2020
LLC
Summary for Subcatchment 1 S: Runoff
Verner Child Care 2, Detention, 25-yr Storm (Post -Construction)
Runoff 3.33 cfs @ 0.08 hrs, Volume= 0.024 af, Depth= 0.55"
Runoff by Rational method, Rise/Fall=1'.0/1.0 xTc, Time Span= 0,00-50.00 hrs, dt= 0.01 hrs
Rainfall Duration=5 min, lnten=7,32 in/hr
Area (ac) C Description
0.520 0.90 Pavement
0.520 100-00% Pervious Area
Tc Length Slope Velocity Capacity Description
(min) feet _ (fUft) (ft/sec) (cfs)
5.0 220 0.73 Direct Entry, Tc Entered Directly
Subcatchment IS: Runoff
Hydrograph
3.33 cis
Rainfa I
3-
DurAtion=5 mir
1, ten- '171. 132 ir /hr
7
-
4
U, Off �1,e�=0.520 a,
'Uno f Olu ).0 F, f
U�, oif Dqpffi�O 5
2
Fllow e gth.- 20
­J—
J.r
5.1 r n ll
C =0 9
0.. will, ...........
0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 3"2' 34 06 38 40 42 44 46 48 50
Time (hours)
I'm

Verner Child Care 2, 25-yr Storm (Post-Const) Rainfall Duration=5 min, Inten=7.32inlhf
Prepared by Davis CivilSolutions, PA Printed 3/13/2020
HydroCAD@10.10-3a s/n03655 @2020 HydroCAD Software Solutions LLC Page 2
Time Runoff
�hours) (cfs)
0,00 0.00
0.50 0.00
1.00 0.00
1.50 0.00
2.00 0.00
2.50 0.00
3.00 0.00
3.50 0.00
4.00 0.00
4.50 0.00
5.00 0.00
5.50 0.00
6.00 0.00
6.50 0.00
7.00 0.00
7.50 0.00
8.00 0.00
8.50 0,00
9,00 OM
9,50 0,00
10.00 0,00
10,50 0.00
11.00 0,00
11.50 0.00
12.00 0.00
12.50 0.00
13.00 0.00
13.50 0.00
14.00 0.00
14.50 0.00
15.00 0.00
15.50 0.00
16.00 MO
16.50 0.00
17.00 0.00
17.50 0.00
18.00 0.00
18.50 0,00
19.00 0.00
19,50 0,00
20.00 0,00
20.50 0.00
21,00 0.00
21,50 0.00
22.00 0.00
22.50 0.00
23.00 0,00
23.50 0.00
24.00 0.00
24.50 0.00
25,00 0.00
25.50 0,00
Hydrograph for Subcatchment 1S: Runoff
Time Runoff
(hours) (cfs)
26.00 0.00
26.50 0.00
27.00 0.00
27.50 0.00
28.00 MO
28.50 0.00
29.00 0.00
29.50 0.00
30.00 0.00
30.50 0.00
31.00 UO
31.50 0.00
32.00 0.00
32.50 0.00
33.00 0.00
33.50 0.00
34.00 0.00
34.50 0.00
35.00 0.00
35.50 0.00
36,00 0.00
36,50 0.00
37.00 0.00
37,50 0.00
38,00 0.00
3&50 0,00
39.00 0.00
39.50 0,00
40.00 0,00
40.50 MO
41.00 OM
41.50 0.00
42.00 0.00
42.50 0,00
43.00 0,00
43.50 0.00
44,00 OM
44.50 0.00
45,00 0.00
45.50 0.00
46.00 0.00
46.50 0.00
47.00 0.00
47.50 0.00
48.00 0.00
48.50 0,00
49.00 0.00
49.50 0,00
50.00 0.00
a

Verner Child Care 2, 25-yr Storm (Post-Const) Rainfall Duration=5 min, Inten=7.32 in✓hr
Prepared by Davis CivilSolutions, PA Printed 3/13/2020
HydroCADO 10.10-3a s/n 03655 C 2020 HydroCAD Software Solutions LLC Page 3
Summary for Pond I P: StormTech
StormTech Detention Facility
Inflow Area = 0,520 ac, 0.00% Impervious, Inflow Depth = 0.55"
Inflow 3.33 cfs @ 0.08 hrs, Volume= 0,024 of
Outflow = 0.56 cfs @ 0.15 hrs, Volume= 0.024 af, Atten= 83%,, Lag= 4.3 min
Primary = 0,56 cfs @ 0.15 hrs, Volume= 0.024 of
Routing by Stor-Ind method, Time Span= 0.00-50.00 hrs, dt= 0.01 hrs
Peak Elev= 1.41' @ 0,15 hrs Surf,Area= 1,108 sf Storage= 930 cf
Plug -Flow detention time= 90.7 min calculated for 0.024 of (100% of inflow)
Center -of -Mass clet. time= 90.8 min ( 95.8 - 5.0 )
Volume Invert Avail.Storage Storage Description
#1A 0.00, 1,611 cf 22.75'W x 48.72% x 5.50'H Field A
6,096 cf Overall - 2,069 cf Embedded = 4,028 cf x 40.0% Voids
#2A 0.75' 2,069 cf ADS StormTech MC-3500 d +Cap x 18 Inside #1
Effective Size= 70.4"W x 45.0"H => 15.33 sf x 7.17'L = 110.0 cf
Overall Size= 77.0"W x 45.0"H x 7,501 with 0.33'Overlap
18 Chambers in 3 Rows
Cap Storage= +14.9 cf x 2 x 3 rows = 89A cf
3,680 cf Total Available Storage
Storage Group A created with Chamber Wizard
Device
Routing
Invert
Outlet Devices
#1
Primary
UO'
18.0" Vert. Orifice/Grate C= 0.600 Limited to weir flow at low heads
#2
Device 1
0.00'
1.5" Vert. Orifice/Grate C= 0.600 Limited to, weir flow at low heads
#3
Device 1
1.00'
8.0" Vert, Orifice/Grate C= 0.600 Limited to weir flow at low heads
#4
Device 1
2,00'
3.0' long Sharp -Crested Rectangular Weir 2 End Contraction(s)
0,5' Crest Height
Primary OutFlow Max=0,55 cfs @ 0.15 hrs HW=1.41' (Free Discharge)
=Orifice/Grate (Passes 0.55 cfs of 6.95 cfs potential flow)
1.
-2 =Orifice/Grate (Orifice Controls 0.07 cfs @ 5.58 fps)
-3 =Orif ice/G rate (Orifice Controls 048 cfs @ 2.17 fps)
Sharp -Crested Rectangular Weir ( Controls 0.00 cfs)
n1m

Verner Child Care 2, 25-yr Storm (Post-Const) Rainfall Duration=5 min, Inten=732inlhr
Prepared by Davis CivilSolutions, PA Printed 3/13/2020
HydroCAD@10.10-3a s/n03655 @2020 HydroCAD Software Solutions LLC Page 4
Pond 1 P: StormTech - Chamber Wizard Field A
Chamber Model = ADS—StormTech MC-3500 d +Cap (ADS StormTech@ MC-3500 d rev 03/14 with Cap
volume)
Effective Size= 70.4"W x 45.0"H => 15.33 sf x 7.17L = 110.0 cf
Overall Size= 77.0"W x 45.0"H x 7.501 with 0.33'Overlap
Cap Storage= +14.9 cf x 2 x 3 rows = 89.4 cf
77.0" Wide + 9.0" Spacing = 86.0" C-C Row Spacing
6 Chambers/Row x 7.17' Long +11.85' Cap Length x 2 = 46.72' Row Length +12.0" End Stone x 2 = 48,72'
Base Length
3 Rows x 77.0" Wide + 9.10" Spacing x 2 + 12.0" Side Stone x 2 = 22.75' Base Width
9.0" Stone Base + 45.0" Chamber Height + 12.0" Stone Cover = 5.50'Field Height
18 Chambers x 110.0 cf + 14.9 cf Cap Volume x 2 x 3 Rows = 2,068.5 cf Chamber Storage
6,096.1 cf Field - 2,068.5 cf Chambers = 4,027.6 cf Stone x 40,0% Voids = 1,611.0 cf Stone Storage
Chamber Storage + Stone Storage = 3,679.6 cf = 0.084 of
Overall Storage Efficiency = 60.4%
Overall System Size := 48.72'x 22.75'x 5,50'
18 Chambers
225.8 cy Field
1492 cy Stone
I
N=
n"I

Verner Child Care 2, 25-yr Storm (Post-Const) Rainfall Duration=5 min, Inten=732inlhr
Prepared by Davis CivilSolutions, PA Printed 3/13/2020
HydroCAD(@10,10-3a s/n03655 @202Q dCAD Software Solutions LLC Pa
_tLro_ - ge 5
TV
Pond 1 P: StormTech
Hydrograph
Time (hOUrs)
Discharge (cfs)
Inflpw
® Primary
� Primary
M

Verner Child Care 2, 25-yr Storm (Post-,Const) Rainfall Duration=5 min, Inten=7.32 in1hr
Prepared by Davis CivilSolutions, PA Printed 3/13/2020
HydroCAM 10, 1 0-3a s/n 03655 @ 202LtLdroCAD Software Solutions LLC Page 6
Pond IP: Storml
Stage -Area -Storage
4
3-
2
AN0,02M
0-
0 500 1,000 1,900' 2,600' 2,5 . 00 3,000 3,500
Storage (cubic -feet)
Storage

Verner Child Care 2, 25-yr Storm (Post-Const) Rainfall Duration=5 min, Inten=7.32 in1hr
Prepared by Davis CivilSofutions, PA Printed 3/13/2020
HydroCAD010.10-3a s/n03655 @202Q_!iydroCAD Software Solutions LLC Pa 7
Hydrograph for Pond 1 P: StormTech
Time
Inflow
Storage
Elevation
Primary
(hours)
(Ofs)
(cubic -feet)
(feet)
(cfs)
0.00
0.00
0
0.00
0.00
1.00,
0.00
533
U7
0.06
2.00
0.00
343
0.76
0.05
3,00
0.00
189
0.43
0.04
4,00
MO
86
0.19
0,02
5.00
0.00
35
OM
0.01
6.00
0.00
18
0.04
0.00
7.00
0.00
10
0.02
0,00
8.00
0.00
5
0.01
0,00
9,00
0.00
3
0.01
0.00
10,00
0.00
2
0.00
0,00
11.00
0.00
1
0.00
0.00
12,00
0.00
0
0.00
OM
13,00
0.00
0
0.00
0,00
14.00
0.00
0
0.00
0,00
15,00
0.00
0
0.00
0.00
16.00
OM
0
0.00
0.00
17.00
0.00
0
0.00
0.00
18-00
0.00
0
0.00
0.00
19.00
0,00
0
0,00
0.00
20.00
0.00
0
0.00
0.00
21.00
0.00
0
0.00
0.00
22.00
UO
0
0,00
0.00
23.00
0,00
0
0.00
MO
24.00
0.00
0
0.00
0.00
25.00
0,00
0
0.00
0.00
26.00
0.00
0
0.00
0.00
27.00
0.00
0
0.00
0.00
28.00
UO
0
0.00
0.00
29.00
0.00
0
0.00
OM
30.00
0.00
0
UO
0.00
31.00
0.00
0
0.00
0.00
32.00
0.00
0
0.00
0,00
33.00
OM
0
0.00
0.00
34.00
OM
0
0.00
OM
35.00
0.00
0
0.00
0.00
36.00
0.00
0
0.00
0.00
37.00
0,00
0
0.00
0.00
38.00
0,00
0
0.00
0.00
39.00
OM
0
0.00
0.00
40.00
0,00
0
0,00
0.00
41.00
0.00
0
0.00
0.00
42,00
0.00
0
0.00
0.00
43.00
0.00
0
0.00
0,00
44.00
0.00
0
0.00
0.00
45.00
0.00
0
0.00
0.00
46.00
OM
0
0.00
0.00
47.00
0.00
0
0.00
0.00
48.00
0,00
0
0.00
0.00
49.00
0.00
0
0,00
0.00
50.00
0.00
0
0.00
0.00
5V

Verner Child Care 2, 25-yr Storm (Post-Const) Rainfall Duration=5 min, Inten=732inlhr
Prepared by Davis CivilSolutions, PA Printed 3/13/2020
HydroCADO 10, 1 0-3a s/n 03655 @ 2020 HydroCAD Software Solutions LLC Page 8
Elevation Primary
(feet)
(Cfs)
0.00
0.00
0.04
0,00
0.08
0.01
0.12
0.01
0.16
0.02
0.20
0.02
0.24
0.02
0.28
0,03
0.32
0.03
0.36
0.03
0.40
0.03
0.44
0.04
0.48
0.04
0.52
0.04
0.56
0.04
0.60
0.04
0.64
0,04
0.68
0,05
0.72
0.05
0.76
0.05
0.80
0,05
0.84
0.05
0.88
0.05
0.92
0.05
0.96
0.06
1.00
0.06
1.04
0.06
1,08
0.08
1,12
0.11
1.16
0.15
1.20
0.20
1.24
0.25
1.28
0.32
1.32
0.39
1.36
0.46
1.40
0.54
1.44
0.62
1.48
0.71
1.52
0.79
1.56
0.87
1.60
0,95
1.64
1.01
1,68
1.06
1.72
1.12
1,76
1.17
1.80
1.23
1.84
1.28
1.88
1.32
1.92
1.37
1.96
1.41
2,00
1.45
2.04
1.58
Stage -Discharge for Pond 1 P. StorrnTech
Elevation Primary
(feet)
(Cfs)
2.08
1.76
2.12
1.99
2.16
2.26
2,20
2.56
2.24
2.89
2,28
3.25
2,32
3.63
2.36
4.04
2.40
4.48
2.44
4.94
2.48
5.42
2.52
5.93
2,56
6.45
2.60
7.01
2,64
7.58
2.68
8.17
2.72
8.79
2.76
9.42
2.80
10.08
2.84
10.76
2.88
11.45
2.92
12.17
2.96
12.65
3.00
12.76
3,04
12.88
3.08
12,99
3.12
13,10
116
13.21
3.20
13,32
3.24
13,43
3.28
13.53
3.32
13,64
3.36
13,75
3.40
13.85
3.44
13,96
3.48
14,06
3.52
14.16
&56
14.26
3.60
14.36
3.64
14.46
3.68
14.56
3.72
14.66
3.76
14.76
3.80
14.86
3,84
14.96
3.88
15,05
3.92
15.15
196
15.24
4.00
15.34
4.04
15.43
4,08
15.53
4.12
15,62
Elevation Primary
(feet)
(Cfs)
4.16
15.71
4.20
15.80
4.24
15.90
4.28
15.99
4.32
16.08
4.36
16.17
4.40
16.26
4.44
16.34
4.48
16.43
4.52
16.52
4.56
16.61
4.60
16.70
4.64
16.78
4.68
16.87
4.72
16.95
4.76
17.04
4.80
17.12
4.84
17.21
4.88
17.29
4.92
17.38
4.96
17.46
5.00
17.54
5.04
17,62
5.08
17.71
5.12
17,79
5.16
17,87
5,20
17.95
5,24
18,03
5.28
18,11
5,32
18.19
5.36
18,27
5.40
18,35
5,44
18.43
5.48
18,51
M

Verner Child Care 2, 25-yr Storm (Post-Const) Rainfall Duration=5 min, Inten=732inlhr
Prepared by Davis CivilSolutions, PA Printed 3/13/2020
HydroCADOIO,10-3a s/n03655 @2020 HydroCAD Software Solutions LLC Page 9
Elevation
Storage
(feet)
(cubic -feet)
0.00
0
0.04
18
0.08
35
0.12
53
0.16
71
0.20
89
0.24
106
0.28
124
0.32
142
0,36
160
0.40
177
0.44
195
0.48
213
0.52
231
0.56
248
0.60
266
0.64
284
0.68
301
0.72
319
0.76
342
0.80
378
0,84
415
0,88,
452
0.92
488
0,96
525
1,00
561
1.04
598
1.08
634
1,12
670
1.16
706
1.20
743
1.24
779
1.28
815
1.32
851
1,36
887
1.40
922
1,44
958
1.48
994
1.52
1,030
1.56
1,065
1.60
1,101
1.64
1,136
1.68
1,171
1.72
1,207
1.76
1,242
1.80
1,277
1.84
1,312
1,88
1,347
1.92
1,382
1.96
1,416
2.00
1,451
2.04
1,486
Stage -Area -Storage for Pond 1 P: StorrnTech
Elevation
Storage
(feet)
(cubic -feet)
2.08
1,520
2.12
1,554
2.16
1,589
2.20
1,623
2,24
1,657
2.28
1,691
232
1,725
2.36
1,758
2.40
1,792
2.44
1,825
2,48
1,859
2.52
1,892
2.56
1,925
2.60
1,958
2,64
1,990
2.68
2,023
2.72
2,056
2.76
2,088
2.80
2,120
2.84
2,152
2.88
2,184
2.92
2,216
2.96
2,247
3.00
2,279
3.04
2,310
3.08
2,341
3.12
2,3711
3.16
2,402
3.20
2,432
124
2,463
3.28
2,493
3.32
2,522
3,36
2,552
3.40
2,581
3.44
2,610
3.48
2,639
3.52
2,667
3.56
2,696
3.60
2,724
3.64
2,751
3.68
2,779
3.72
2,806
3.76
2,832
3,80
2,859
3,84
2,885
3.88
2,910
192
2,935
196
2,960
4.00
2,984
4.04
3,008
4.08
3,031
4.12
3,053
Elevation
Storage
(feet)
(cubic -feet)
4.16
3,074
4.20
3,094
4.24
3,114
4,28
3,134
4.32
3,153
4.36
3,172
4,40
3,191
4.44
3,209
4A8
3,227
4.52
3,245
4.56
3,263
4.60
3,281
4.64
3,298
4.68
3,316
4.72
3,334
4.76
3,351
4.80
3,369
4.84
3,387
4.88
3,405
4.92
3,422
4.96
3,440
5.00
3,458
5.04
3,476
5.08
3,493
5,12
3,511
5.16
3,529
5.20
3,547
5,24
3,564
5.28
3,582
5.32
3,600
5,36
3,617
5,40
3,635
5.44
3,653
5.48
3,671

Verner Child Care, Bypass, 1 -yr Storm (Pre-Const) Rainfall Durafion=5 min, Inten=3, 95 in1hr
Prepared by Davis CivilSolutions, PA Printed 3/13/2020
HydroCADOIO,10-3a s/n03655 @2020, HydroCAD Software Solutions LLC Page 1
Summary for Subcatchment IS: Runoff
Verner Child Care, Bypass, 1 -yr. Storm Event (Pre -Construction)
Runoff 3.88 cfs @ 0.08 hrs, Volume= 0.028 af, Depth= 0,09"
Runoff by Rational method, Rise/Fall=1.0/1.0 xTc, Time Span= 0.00-3.00 hrs, dt= 0,01 hrs
Rainfall Duration=5 min, Inten=3.95 in/hr
Area (ac) C. Description
2.590
0.25
Woodlands
1.130
0.20
Lawns, Maintained
0,160
0.90
Rooftop, Pavement
3.880
0.26
Weighted Average
3,880
100.00% Pervious Area
Tc Length Slope Velocity Capacity Description
(min feet) (ft/ft ftfsec)cfs
5.0 Direct Entry,
0
U_
T%me (hours)
ffol

Verner Child Care, Bypass, 1 -yr Storm (Pre-Const) Rainfall Duration=5 min, Inten=3.95 in1hr
Prepared by Davis CivilSolutions, PA Printed 3/13/2020
HydroCAD@10.10-3a s/n03655 @2020 HydroCAD Software Solutions LLC PgggL2
Time Runoff
(hours) (cfs)
0.00 0.00
0.02 0.96
0.04 1,93
0.06 2.89
OM 3.86
0.10 3.21
0.12 2.25
0.14 1.29
0.16 0.32
0.18 0.00
0.20 0.00
0.22 0.00
0.24 0.00
0.26 0.00
0.28 0.00
0.30 0.00
0.32 0.00
0.34 0,00
0.36 0,00
0.38 0.00
0.40 0,00
0.42 0,00
0.44 0.00
0.46 0.00
0.48 MO
0,50 0.00
0.52 0.00
0.54 0.00
0,56 0.00
0.58 0.00
0.60 0.00
0.62 0.00
0,64 0.00
0.66 MO
0,68 0.00
0.70 0.00
0.72 0.00
0,74 0.00
0.76 0.00
0.78 0.00
0,80 0.00
0.82 0.00
0.84 0.00
0.86 0.00
OM 0.00
0.90 0.00
0.92 0.00
0.94 0.00
0,96 0.00
0.98 0.00
1.00 0,00
1,02 0.00
Hydrograph for Subcatchment IS: Runoff
Time Runoff
(hours) (cfs)
1,04 0.00
1,06 0.00
1.08 0.00
1 A O 0.00
1,12 0.00
1.14 0.00
1,16 OM
1.18 0.00
1.20 0.00
1.22 0.00
1,24 0.00
1.26 0.00
1.28 0.00
1.30 0.00
1.32 0.00
1.34 0.00
1.36 0.00
1.38 0.00
1.40 0.00
1.42 0.00
1.44 0.00
1.46 0.00
1.48 OM
1.50 0,00
1.52 OM
1.54 0.00
1.56 0.00
1.58 0.00
1.60 0.00
1.62 0.00
1.64 OM
1,66 0.00
1,68 0.00
1.70 0.00
1.72 0.00
1.74 0,00
1.76 0.00
1.78 0.00
1.80 0,00
1.82 0,00
1.84 0.00
1.86 0,00
1.88 0.00
1.90 0.00
1.92 0.00
1.94 0.00
1.96 0.00
1.98 OM
2.00 OM
2.02 0,00
2.04 0,00
2.06 0.00
Time Runoff
(hours)
(cfs)
2.08
0.00
210
0.00
2.12
0.00
2.14
0.00
2.16
0.00
2.18
0.00
2.20
0.00
2.22
0.00
2.24
0.00
2.26
0.00
2.28
MO
2.30
0.00
2.32
0.00
2.34
0.00
2.36
0.00
2.38
0.00
2.40
0.00
2.42
0.00
2,44
0.00
2,46
0,00
2.48
0,00
2.50
0.00
2.52
0,00
2.54
0.00
2.56
0.00
2.58
0.00
2.60
0.00
2.62
0.00
2.64
0.00
2.66
0.00
2.68
0.00
2.70
0.00
2.72
0.00
2.74
UO
2.76
0.00
2.78
0.00
2.80
0.00
2.82
0.00
2.84
0.00
2.86
0.00
2,88
0.00
2.90
0,00
2,92
0.00
2,94
UO
2.96
0.00
2,98
0.00
3.00
0.00
M

Verner Child Care, Bypass, I -yr Storm (Post -Cons Rainfall Duration=5 min, Inten=3,95 in1hr
Prepared by Davis CivilSolutions, PA Printed 3/16/2020
HydroCADO 10.1 0-3a s/n 03655 @ 2020 HydroCAD Software Solutions LLC _. Page 1
Summary for Subcatchment 1 S: Runoff
Verner Child Care, Bypass, 1 -yr. Storm Event (Post -Construction)
Runoff = 3.73 cfs @ 0.08 hrs, Volume= 0.027 af, Depth= 0,08"
Runoff by Rational method, Rise/Fall=1.0/1.0 xTc, Time Span= 0,00-3.00 hrs, dt= 0.01 hrs
Rainfall Duration=5 min, Inten=3,.95 in/hr
Area (act C Description
2.590
0.25
Woodlands
1,220
0.20
Lawns, Maintained
0.070
0,90
Rooftop, Pavement
3,880
0.25
Weighted Average
3.880
100.00% Pervious Area
Tc Length Slope Velocity Capacity Description
_(min) (feet) (ft/ft) (ft/sec) (cfs)
5.0 Direct Entry,
U
0
U_
Time (hours)
U

Verner Child Care, Bypass, 1 -Yr Storm (Post -Cons Rainfall Duration=5 min, Inten=3.95 in1hr
Prepared by Davis CivilSolutions, PA Printed 3/16/2020
HydroCADO 10,10-3a s/n 03655 @ 2020 HydroCAD Software SoMions LLC Pa-ge 2
Time Runoff
thours) (cfs)
0,00 0.00
0.02 0,93
U4 1,85
0.06 2.78
0.08 3.71
0,10 3.09
0.12 2A6
0.14 1,24
0,16 0,31
0,18 0.00
0.20 0,00
0,22 0.00
0.24 0.00
0.26 0.00
0,28 0.00
0.30 0.00
0.32 0.00
0.34 0,00
0.36 0.00
0.38 0.00
0.40 0.00
0.42 0.00
0.44 0.00
0.46 0.00
0.48 0.00
0.50 0.00
0.52 0.00
0.54 0,00
0.56 0.00
0.58 OM
0.60 0,00
0.62 0.00
0.64 0.00
0.66 0,00
0.68 0.00
0.70 0.00
0.72 0.00
0.74 0.00
0.76 0.00
0.78 0.00
0.80 0.00
0.82 0.00
0,84 0.00
0.86 0.00
0,88 0.00
0.90 0.00
0.92 0,00
0.94 0.00
0.96 0.00
0.98 0.00
1.00 0.00
1.02 0.00
Hydrograph for Subcatchment 1S: Runoff
Time Runoff
(hours) (cfs)
1.04 0.00
1.06 0,00
1.08 0.00
1.10 0.00
1.12 0.00
1.14 0.00
1.16 0.00
1 A 8 0,00
1.20 0.00
1.22 0.00
1.24 0.00
1.26 0.00
1.28 0,00
1.30 0,00
1.32 0.00
1.34 0,00
1,36 0.00
1,38 0.00
1.40 0.00
1,42 0.00
1.44 0.00
1.46 0.00
1.48 0.00
1.50 OM
1.52 0.00
1.54 0.00
1.56 0.00
1.58 0.00
1.60 0.00
1.62 0.00
1.64 0.00
1.66 OM
1.68 0.00
1.70 0.00
1.72 0.00
1.74 0.00
1.76 0.00
1.78 0.00
1,80 0.00
1.82 0.00
1,84 0.00
1.86 0.00
1.88 0,00
1.90 OM
1.92 0.00
1.94 0,00
1.96 0.00
1.98 0.00
2.00 0.00
2.02 0.00
2.04 0.00
2,06 0.00
Time Runoff
(hours) (cfs)
2.08 0.00
2.10 0,00
2,12 0,00
2,14 0.00
2.16 0,00
2,18 0,00
2.20 UO
2.2�2 0.00
2,24 0.00
2,26 0.00
2.28 OM
2,30 0.00
2.32 0.00
2.34 0.00
2.36 0.00
2.38 0.00
2.40 0.00
2.42 0.00
2.44 0.00
2.46 0.00
2.48 0.00
2.50 0.00
2.52 0.00
2.54 0.00
2.56 0.00
2.58 0.00
2.60 0.00
2,62 0,00
2,64 0.00
2.66 0.00
2,68 0.00
2.70 0.00
2.72 0.00
2,74 0.00
2,76 0.00
2.78 0,00
2,80 0.00
2.82 0.00
2.84 0.00
2.86 0.00
2.88 0.00
2.90 0.00
2.92 0.00
2.94 0.00
2.96 0.00
2.98 0.00
3.00 0,00
M

Verner Child Care, Bypass, 10-yr Storm (Pre -Cons Rainfall Duration=5 min, Inten=6.37 in1hr
Prepared by Davis CivilSolutions, PA Printed' 3/13/2020
HydroCAD@10.10-3a s/n03655 @2020 HydroCAD Software Solutions LLC Page 1
Summary for Subcatchment 1S: Runoff
Verner Child Care, Bypass, 10-yr. Storm Event (Pre -Construction)
Runoff = 6.25 cfs @ 0.08 hrs, Volume= 0,045 af, Depth= 0.14"
Runoff by Rational method, Rise/Fall=1.0/1.0 xTc, Time Span= 0.00-3.00 hrs, dt= 0,01 hrs
Rainfall Duration=5 min, lnten=6.37 in/hr
Area (ac) C Description
2.590 0.25 Woodlands
1.130 0.20 Lawns, Maintained
0.160 0.90 Rooftop, Pavement
3,880 0.26 Weighted Average
3.880 100.00% Pervious Area
Tc Length Slope Velocity Capacity Description
m i n) t/ (feet) ft_ft) (ft/secy(cfs)
5.0 Direct Entry,
0
11
Subcatchment IS: Runoff
Hydrograph
7-
6.25 ds
- ------ Duration min,
5­
lnten=6.37 in/hr
- Runoff Area=3,880-ac--J
RunoffYolume=0.045 of
3-Ruin offDe-ptht-i-0.1411-
Tc=5.0 min
C=0.26
0
Time (hours)
C9 Runoff
19

Verner Child Care, Bypass, 1 O-yr Storm (Pre -Cons Rainfall Duration=5 min, Inten=6.37 in1hr
Prepared by Davis CivilSolutions, PA Printed 3/13/2020
HydroCAD@10.10-3a s/n03655 @2020 HydroCAD Software Solutions LLC Pa-ge 2
Time Runoff
(hours) (cfs�
0.00 MO
0.02 1,56
0.04 3.11
0.06 4.67
0.08 6.22
OAO 5.18
0.12 3.63
0.14 2,07
0.16 0,52
0.18 0.00
0.20 0.00
0.22 0.00
0.24 0.00
0.26 0,00
0.28 0,00
0.30 0.00
0.32 0,00
0.34 0,00
0.36 0.00
0.38 0.00
0.40 0.00
0.42 0.00
0.44 0.00
0.46 0.00
0.48 0.00
0,50 0.00
0.52 0.00
0.54 0.00
0,56 0.00
0.58 UO
0.60 0.00
0,62 0.00
0,64 0.00
0.66 0,00
OM 0.00
0,70 MO
0.72 0.00
0.74 0.00
0.76 0.00
0.78 0.00
0.80 0.00
OM 0.00
0.84 MO
0,86 0.00
0.88 0,00
0.90 0.00
0.92 0.00
0.94 0.00
0,96 0.00
0.98 0,00
1.00 0.00
1,02 0.00
Hydrograph for Subcatchment 1 S: Runoff
Time Runoff
_(hours) -.(cfs)
1.04 0.00
1.06 0.00
1.08 0.00
1.10 0.00
1.12 0.00
1.14 0.00
1.16 0.00
1.18 OM
1.20 0.00
1.22 0.00
1.24 0.00
1.26 0,00
1.28 0,010
1.30 0.00
1.32 0,00
1.34 0,00
1.36 0.00
1.38 0,00
1.40 0.00
1.42 OM
1.44 OM
1,46 0.00
1.48 0.00
1,50 0.00
1,52 0.00
1.64 0.00
1.56 0.00
1.58 0.00
1.60 0.00
1.62 0.00
1.64 0.00
1.66 0.00
1.68 0.00
1.70 OM
1.72 0.00
1.74 0.00
1.76 0.00
1.78 0.00
1,80 0.00
1.82 0.00
1.84 0.00
1.86 0.00
1.88 0.00
1.90 0.00
1.92 0,00
1.94 0.00
1.96 0.00
1.98 OM
2.00 OM
2,02 0.00
2.04 0.00
2.06 0.00
Time Runoff
hours)
(cfs)
2.08
0.00
2.10
0.00
2.12
0.00
2.14
UO
2,16
0.00
2.18
0.00
2.20
0.00
2.22
0.00
2.24
0.00
2.26
0.00
2.28
0.00
2.30
0.00
2.32
0.00
2.34
0.00
2.36
0.00
2.38
0,00
2.40
0,00
2.42
0.00
2.44
0,00
2.46
0.00
2.48
0.00
2,50
0.00
2.52
0.00
2.54
0.00
2,56
0.00
2.58
0.00
2.60
0.00
2.62
0.00
2.64
0.00
2.66
0.00
2.68
0.00
2.70,
0.00
2.72
0.00
2.74
0.00
2.76
0.00
2.78
UO
2.80
0.00
2,82
0.00
2.84
0.00
2,86
0.00
2.88
OM
2.90
0.00
2.92
0.00
2.94
UO
2.96
0.00
2.98
0.00
3.00
0.00
91

Verner Child Care, Bypass, I O-yr Storm (Post -Con Rainfall Duration=5 min, Inten=6.3 7 in1hr
Prepared by Davis CivHSolutions, PA Printed 3/13/2020
HydroCAD@10.10-3a s/n03655 @2020 HydroCAD Software Solutions LLC Page 1
Summary for Subcatchment 1S: Runoff
Verner Child Care, Bypass, 1 0-yr. Storm Event (Post -Construction)
Runoff = 6.01 cfs @ 0.08 hrs, Volurne= 0.043af, Depth= 0,13"
Runoff by Rational method, Rise/Fall=1.0/1.0 xTc, Time Span= 0.00-50.00 hrs, dt= 0,01 hrs
Rainfall Duration:=5 min, lnten=6.37 in/hr
Area (ac) C Description
2,590
0.25
Woodlands
1.220 '
0.20
Lawns, Maintained
0.070
0.90
Rooftop, Pavement
3380
0.25
Weighted Average
3.880
100. 00% Pervious Area
Tc; Length Slope Velocity Capacity Description
(min) (feet j (ft/ft) (ft/sec) (cfs)
5.0 Direct Entry,

Verner Child Care, Bypass, 1 O-yr Storm (Post -Con Rainfall Duration=5 min, Inteo=6.37 in1hr
Prepared by Davis CivilSolutions, PA Printed 3/13/2020
HydroCADO 10.10-3a s/n-03655 @ 2020 HydroCAD Software Solutions LLC Page 2
Time Runoff
(hours) (cfs)
0.00 0.00
0.50 0.00
1.00 MO
1.50 0,00
2.00 0,00
2.50 0.00
3.00 0,00
3.50 0.00
4.00 0.00
4.50 0,00
5,00 0,00
5.50 0.00
6.00 0,00
6.50 0.00
7.00 0.00
7.50 0.00
&00 0,00
8.50 0.00
9.00 0.00
9,50 0.00
10.00 0.00
10.50 0.00
11,00 0.00
11.50 0.00
12.00 0.00
12.50 0.00
13.00 0.00
1&50 0.00
14.00 0.00
14,50 0.00
15.00 0.00
15.50 0,00
16.00 0.00
16.50 0.00
17.00 0,00
17.50 0.00
18.00 0.00
18.50 0.00
19.00 0.00
19.50 0.00
20,00 0.00
20,50 0.00
21.00 0.00
21,50 0.00
22.00 0.00
22.50 0,00
23.00 0.00
23.50 0.00
24.00 0.00
24,50 0.00
25.00 0.00
25.50 0.00
Hydrograph for Subcatchment 1S: Runoff
Time Runoff
(hours) (cfSj
26.00 0.00
26.50 0.00
27.00 0.00
27.50 0.00
28,00 0.00
28.50 0.00
29.00 0.00
29.50 0.00
30.00 0.00
30.50 0.00
31.00 0.00
31.50 0.00
32,00 0.00
32.50 0.00
33.00 0.00
33,50 0.00
34.00 0.00
34,50 0,00
35.00 0.00
35.50 0,00
36.00 0,00
36.50 0.00
37.00 0,00
37.50 0.00
38.00 0.00
38.50 0.00
39.00 0.00
39.50 OM
40.00 0.00
40.50 0.00
41.00 OM
41.50 0.00
42.00 0.00
42.50 0.00
43.00 0.00
43.50 0.00
44.00 0.00
44.50 0.00
45.00 0.00
45.50 0.00
46.00 0.010
46.50 0,010
47.00 0.00
47.50 0,00
48,00 0.00
48.50 0.00
49.00 0.00
49.50 0.00
50.00 0.00
0

Verner Child Care, Bypass, 25-yr Storm (Pre -Cons Rainfall Durafion=5 min, Inten=7.32 in1hr
Prepared by Davis CivilSolutions, PA Printed 3/13/2020
HydroCADO 10. 1 0-3a s/n 03655 @ 2020 HydroCAD Software Solutions LLC Page 1
Summary for Subcatchment 1S: Runoff
Verner Child Care, Bypass, 25-yr. Storm Event (Pre -Construction)
Runoff = 7.19 cfs @ 0.08 hrs, Volume= 0,051 af, Depth= 0.16"
Runoff by Rational method, Rise/Fall=1.0/1.0 xTc, Time Span= 0.00-3,00 hrs, dt= 0.01 hrs
Rainfall Duration=5 min, Inten=7.32 in/hr
Area (ac) C Description
2.590
0.25
Woodlands
1.130
0.20
Lawns, Maintained
0.160
0.90
Rooftop, Pavement
3.880
0.26
Weighted Average
3,880
100.00% Pervious Area
Tc Length Slope Velocity Capacity Description
(min) (feet) (ft/ft) (ft/sec) (Cf s)
5.0 Direct Entry,
.2
LL
Subcatchment 1S: Runoff
Hydrograph
7.19 Os
7- Rainfall
LDu ration=5 -m-In
lnten=7.32 in/hr
Runoff Area=3.880 ac
--RunoffIVolume=O -051--af -
Runoff Depth=0.16"
c=5.0 min
2.' . .. . ........ .... . --C=O-.26
Oo i
2
Time (hours)
I ID Runoff
w

Verner Child Care, Bypass, 25-yr Storm (Pre -Cons Rainfafi Durafian=5 min, 1t7ten=7.32 in1hr
Prepared by Davis CivilSolutions, PA Printed 3/13/2020
HydroCADO 10. 1 0-3a s/n 03655 @ 2020 HydroCAD Software Solutions LLC - Page 2
Time Runoff
�Oursl­ (cf S)
0.00 0.00
0.02 1,79
0.04 3.57
0.06 5.36
0.08 7.15
0.10 5.96
0.12 4.17
0.14 2,38
0.16 0,60
0.18 0.00
0.20 0,00
0.22 0,00
0.24 0.00
0.26 OM
0.28 0,00
0.30 0.00
0.32 0.00
0.34 0.00
0,36 0.00
0.38 0.00
0.40 0.00
0.42 0.00
0,44 0.00
0.46 0.00
0.48 0.00
0.50 0.00
0.52 0.00
0.54 0.00
0.56 0.00
0.58 0.00
0.60 0.00
0.62 0.00
0.64 0.00
0.66 0.00
0.68 0.00
0.70 OM
0.72 0.00
0.74 0.00
0.76 0.00
0.78 0.00
OM 0.00
0.82 0.00
0,84 0.00
0.86 0.00
0.88 0.00
MO 0.00
0.92 0,00
0.94 0.00
0.96 0.00
0.98 0.00
1.00 0.00
1.02 0.00
Hydrograph for Subcatchment IS: Runoff
Time Runoff
(hours) ifs)
1.04 0.00
1.06 OM
1.08 0.00
1.10 0.00
1.12 0.00
1.14 0.00
1.16 0.00
1.18 0.00
1.20 0.00
1.22 0.00
1.24 OM
1.26 0.00
1.28 0.00
1.30 OM
1.32 0.00
1.34 0.00
1.36 0.00
1.38 UO
1,40 0.00
1.42 0.00
1.44 0.00
1,46 0.00
1.48 0.00
1.50 0.00
1,52 0.00
1.54 0.00
1.56 0.00
1.58 0.00
1.60 01-00
1.62 0.00
1.64 0.00
1.66 0.00
1.68 0.00
1.70 0.00
1.72 0.00
1,74 OM
1.76 OM
1.78 0.00
1.80 0.00
1.82 0.00
1.84 0.00
1.86 0.00
1,88 0.00
1.90 0,00
1.92 0,00
1.94 0.00
1.96 0,00
1.98 OM
2.00 UO
2.02 0.00
2.04 0.00
2.06 0.00
Time Runoff
(hours)
(cfs)
2.08
UO
2.10
0.00
2.12
0.00
2.14
0.00
2.16
0.00
2.18
0.00
2.20
0.00
2.22
MO
2.24
0.00
2.26
0.00
2.28
0.00
2.30
0.00
2.32
0.00
2.34
0.00
2.36
OM
2.38
0.00
2.40
0.00
2.42
0,00
2.44
0.00
2.46
0,00
2.48
0.00
2.50
0.00
2.52
0.00
2.54
0,00
2.56
0.00
2,58
0.00
2.60
0.00
2,62
0.00
2.64
0.00
2.66
0.00
2.68
0.00
2.70
0.00
2.72
OM
2.74
01.00
2.76
0.00
2.78
0.00
2.80
0.00
2,82
0.00
2.84
0.00
2,86
0.00
2.88
OM
2.90
OM
2.92
OM
2.94
0.00
2.96
0,00
2.98
0.00
3.00
O'N
M

Verner Child Care, Bypass, 25-yr Storm (Post -Con Rainfall Duration=5 min, Inten=732 in✓hr
Prepared by Davis CivilSolutions, PA Printed 3/13/2020
HydroCADO 10.10-3a s/n 03655 @ 2020 HydroCAD Software Solutions LLC - Page 1
Summary for Subcatchment 1S: Runoff
Verner Child Care, Bypass, 25-yr. Storm Event (Post -Construction)
Runoff = 6.91 cfs @ 0.08 hrs, Volume= 0.049af, Depth= 0.15"
Runoff by Rational method, Rise/Fall=1.0/1.0 xTc. Time Span= 0.00-50,00 hrs, dt= 0.01 hrs
Rainfall Duration=5 min, lnten=7.32 in/hr
Area (ac) C Description
2.590
0.25
Woodlands
1220
0.20
Lawns, Maintained
0.070
0,90
Rooftop, Pavement
3,880
0.25
Weighted Average
3.880
100.00% Pervious Area
Tc Length Slope Velocity Capacity Description
min ) (feetft/ftL (ft/sec) (cfs)
5.0 Direct Entry,
2
LL
K101

Verner Child Care, Bypass, 25-yr Storm (Post -Con Rainfall Durafion=5 min, Inten=7.32 in1hr
Prepared by Davis CivilSolutions, PA Printed 3/13/2020
HydroCADO 10.10-3a s/n 03655 @ 2020 HydroCAD Software Solutions LLC Page 2
Time Runoff
(hours) (cfs)
0.00 0.00
0.50 0.00
1.00 0,00
1.50 0.00
2.00 0.00
2.50 0,00
3.00 0.00
3.50 0.00
4.00 0,00
4.50 0.00
5.00 0.00
5.50 0,00
6.00 0.00
6.50 0.00
7.00 0,00
7.50 0,00
8.00 0.00
8.50 0.00
9.00 0.00
9,50 0.00
10.00 0.00
10.50 0.00
11,00 0.00
11.50 0.00
12.00 0.00
12.50 0.00
13.00 0.00
1&50 0.00
14.00 0.00
14.50 0.00
15.00 UO
15-50 0.00
16.00 0.00
16.50 0.00
17.00 0.00
1T50 0.00
18.00 0.00
18.50 0.00
19.00 UO
19.50 0,00
20,00 0.00
20,50 0.00
21.00 0.00
21.50 0.00
22.00 0,00
22.50 0.00
23.00 0.00
23.50 0.00
24.00 UO
24,50, 0.00
25.00 0.00
25,50 0.00
Hydrograph for Subcatchment 1S: Runoff
Time Runoff
(hours) (cfs)
26-00 0.00
26.50 0.00
27.00 MO
27.50 0.00
28.00 0.00
28.50 0.00
29.00 0.00
29.50 0.00
30.00 0.00
30.50 0.00
31.00 0.00
31.50 0.00
32.00 0.00
32.50 0.00
33.00 0.00
33.50 0.00
34.00 0.00
34.50 UO
35.00 0.00
35.50 0.00
36.00 0,00
36.50 0,00
37.00 0.00
37,50 0,00
38.00 0.00
38.50 0.00
39.00 0.00
39.50 0.00
40,00 0.00
40.50 0.00
41.00 0.00
41.50 0.00
42,00 0.00
42.50 0.00
43.00 0.00
43,50 0.00
44.00 0.00
44,50 0.010
45.00 0,00
45,50 0,00
46,00 0.00
46.50 OM
47.00 0.00
47,50 0.00
48.00 0.00
48.50 0.00
49.00 0.00
49.50 0.00
50,00 0.00
M100

Very �'��.��u�
are
Buncombe County, North Carolina
Operation & Maintenance Plan
Storm Water System
Proiect Description:
Verner Center for Early Learning owns and nl@iDtaiOG a storm water COU|8Ction system located
on North Louisiana Avenue (PIN No. 9039-22-3201)west ofAztec Lane in north Buncombe
County, adjacent to Emma Elementary School. The storm water facility consists of underground
collection piping and two (2) below -ground StormTech detention systems. These facilities serve
a commercial dental office complex.
Storm Water Management Plan:
The storm water management system for this property is designed to meet the requirements of the
Buncombe County Storm Water Ordinance. This includes aonUeution system designed tucollect the
storm water runoff from the rainfall events up to the 25-year rainfall event and transport this water to two
(2)be|nw'gnoundatormvvatermnonagement(detontiom)syutems.whiobpnzvidavvah*rguanUtyandquaUty
control. The system is designed to reduce the amount discharged to the downstream surface water from
the1'yemr. 10-year,and 25-yoorstorm events. The system is sized torestrict the discharge ofthe post -
development volume to that of the pre -development conditions. VVober quality is provided by utilizing
controls to allow appropriate detention time in the systems for reduction of total suspended solids, for the
post -development volume from the f-year storm event.
The water collected in each subsurface oturnn water management system is controlled by an inlet
structure which directs the runoff from the 1-year rainfall into an "isolator" row encased in filter cloth which
provides the required water quality control, Larger ebnrme are directed into e system of arched pipes
where the volume ofwater and the outlet discharge ofthat water is controlled by an outlet structure with
orifices and vveiro, sized to restrict the Movv rate passing through and discharging out of the system. The
StormTech system consists of plastic arched pipes constructed on and surrounded by washed stone, and
are ofsuch quantity bocontain the volume ofrunoff from the above referenced storm events,
Operational Considerations:
The storm water management system has two (2)main components:
Collection System: This consists of inlets and pipes that collect the surface water runoff and transport the
vxeher into the storm water management system. It is critical for these inlets to remain open at all times
and to avoid the entmspmentofsediment and other debris. The system should be inspected periodically
to be uuns it is functioning properly. This ahmw|d include the removal of any accumulated debris or
sediment in the inlets. It is critical for the storm water that reaches the storm water management system
bobeesclean aspossible.
Storm Water Management System (StornmTecb System): This consists of e aeries of arched pipes
encased in washed otone, and inlet distribution and outlet control structures. The inlet and outlet control
structures should be inspected to make sure the area around the orifices is clear nfany sediment or
debris, Any obstructions that could obstruct the outlet should be removed from the structure. The system
should bechecked tomake sure there isnosediment layer. Anaccumulation ofsediment will ^p|ug''the
filter system and diminish the ability of the system in treat the storm water.

Listed below are the recommended' Best Management Practices (BIVIP) for the maintenance of the
system as approved under original permitting with the Buncombe County Storm Water Office.
Storm Draina-ge System Maintenance Schedule:
1. The storm drainage system generally consists of numerous chambers of ADS 8tnrmTeoh 5C`3500
arched pipes with end caps, completely encased by up to a 12" layer of washed stone, with inlet and
outlet distribution and control boxes, and interconnected by 18^ or 24^ plastic piping. These
chambers provide the required storage of runoff to allow the reduction of the rate of discharge from
the system,
2. The storm inlet control structure consists of a weir which directs the runoff from the 1 -year rainfall into
the first now of chambers called the Isolator Row. The outlet control box consists of weirs with orifice
openings attheir base which control the rate ofdischarge from the system.
3. All in|ehs, out|etn, and associated connecting piping should be inspected on a guarterly basis for
trash and/or debris buildup. Any blockages and/or sediment buildup should beremoved
------ allow free
flow ofstorm water runoff. The interiors should be inspected at the same time to assure that all joints
in the piping remain intact and that the pipes are functioning properly.
4, The outlets to all pipes including the storm water management system should be inspected quarterly
for blockages and/or displacement of outlet protection stmne, and for build-up of—
-----�
(where applicable) which might hinder the outlet �ovv, grass/vegetation
5, The outlet control facilities for the management system, located at the outlet end of the 3tonmTech
detention system allow the backup of runoff for delayed discharge from varying storm events. The
control outlet for water quality for the 1 -year storm event is an orifice and weir located at the invert of
weir plate inside the outlet control. Control outlets for water quantity (2-yearthrouOh 25-year storm
events) are an orifice and weir located in the secondary weir plate immediately downstream of the
first plate.
G. The outlet control devices should be inspected on a monthly basis for debris or other items causing
blockage to the entrance. The devices should be inspected a,fter each maior storm event that fills
the detention piping.
7. The StormTeoh piping should be inspected quarterly for build-up of sediment that will daoneeae the
storage capacity of the systems. Sediment should not be allowed' to accumulate over the small
diameter control outlet,
8. Removal of debris and sediment around the curb inlets and drop inlets should be part of the nunna|
parkinB/streetmaintenance program.
A. The inlets and the ShunnTechsystem should beinspected monthly for observancenfoils, excessive
vegetation, orother deleterious substances oritems other than storm water runoff.
10. Removal of high vegetadon, debris and/or sediment around the inlets should be part of the normal
development lawn and parking lot/street maintenance program.
11 The Owner should contract with a |nco| construction company for on -call service in the event ufa
failure ufamyofthe above items.
12 The County should becontacted inthe event offailure mfthe detention system, The Engineer should
also becontacted tudetermine proper repair,
M

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