SW6200402_1490 Storm System_4/22/2020

PROJECT NAME
Johnsonville School Road Subdivision
DATE
03.17-20
PROJECT NO
1490
DESIGN PHASE
PRELIM
CONSTR / X /
REVISION
LOCATION
Harnett County, North Carolina
BY
CJP
RECORD
OTHER
CHECKED BY
CSB
(SPECIFY)
n= 0.013
g= 226
h= 26
STORM DRAINAGE SCHEDULE CONTINUED
AREAS
(INLETS)
INLET
AREA
(AC)
INLET
Cc
RUNOFF
COEFF.
INLET
DISCHARGE
(CFS)
Q (+)
UPSTREAM
BYPASS
(CFS)
Q(-)
INLET
BYPASS
(CFS)
CAPTURED
INLET
DISCHARGE
(CFS)
TOTAL
AREAS
(AC)
INLET
TIME
(MIN)
PIPE
TIME
(MIN)
Tc
TIME
OF CONC.
(MIN)
I
INTENSITY
(IN/HR)
Cc
RUNOFF
COEFF.
FROM TO
0.35 0.46
SOL
0+28.3
SOL
0.33
0.00
0.00
0.46
0.33
5.00
0.00
5.00
8.75
0.35
SOL
4+03.5
SOL
39.81
0.25 39.81
0.00
0.00
39.81
39.81
5.00
0.00
5.00
5.86
0.25
SOL
29+86.6
SOL
0.85
0.55 1.87
0.00
0.00
1.87
0.85
5.00
0.00
5.00
8.75
0.55
WOL
0+45.4
WOL
0.26
0.40 0.42
0.00
0.00
0.42
0.26
5.00
0.00
5.00
8.75
0.40
WOL
1+93.4
WOL
5.56
0.25 5.56
0.00
0.00
5.56
5.56
5.00
0.00
5.00
8.75
0.25
SEA
2+21
SEA
3.04
0.45 5.47
0.00
0.00
5.47
3.04
5.00
0.00
5.00
8.75
0.45
DOUBLE SEA
5+50.9
DOUBLE SEA
8.29
0.45 14.92
0.00
0.00
14.92
8.29
5.00
0.00
5.00
8.75
0.45
SAM
1+19.8
SAM
1.52
0.45 2.74
0.00
0.00
2.74
1.52
5.00
0.00
5.00
8.75
0.45
1490 Storm System.xlsx 10-YEAR Date: 4/22/2020 Time: 8:10 AM Page 1 of 5

DATE
DESIGN PHASE
PROJECT NAME
Johnsonville School Road Subdivision
03-17-20
PRELIM / /
CONSTR / X /
REVISION
PROJECT NO
1490
LOCATION
Harnett County, North Carolina
BY
CJP
RECORD
OTHER
CHECKED BY
CSB
(SPECIFY)
n= 0.013
9= 226
h= 26
STORM DRAINAGE SCHEDULE - CONTINUED
Q
DISCHARGE
(Cl
Q
SIDE-
STREAM
(Cl
SLOPE
DIA.
(IN)
CAPACITY
(FULL)
(Cl
V FULL
(FPS)
LENGTH
(FT)
SEGMENT
TIME
(MIN)
UPPER
INV.
(FT)
LOWER
INV.
(FT)
UPSTREAM
TOP
El
(FT)
FROM TO
9.4 55 0.10
285.10 288.56
274.78 1 282.23
279.50 283.07
284.05 287.44
284.50 288.77
279.60 284.29
276.20 280.76
275.50 280.34
SOL
0+28.3
1.01
0.00
0.0253
18
16.7
286.50
71.40 13.07
4.09 0.00
0.91 0.00
12.16 0.00
SOL
4+03.5
0.0136
48
167.6
13.3 51 0.06
275.48
SOL
29+86.6
0.0146
18
12.7
7.2 66 0.15
280.46
284.50
285.00
WOL
0+45.4
0.0121
18
11.5
6.5 37 0.10
WOL
1+93.4
0.0090
30
39.0
7.9 55 0.12
SEA
2+21
11.97
0.00
0.0130
24
25.8
8.2 50 0.10
280.25
9.3 46 0.08
12.8 41 0.05
DOUBLE SEA
5+50.9
32.64
0.00
0.0123
45.5
276.77
SAM
1+19.8
10.08
0.0318
24
40.4
276.80
1490 Storm System.xlsx 10-YEAR Date: 4/22/2020 Time: 8:10 AM Page 2 of 5

STORMHYDRAULICDATE
ANALYSIS (10 YEAR)
PROJECT NAME
Johnsonville School Road Subdivision
03-17-20
PROJECT NO
1490
LOCATION
Harnett County, North Carolina
BY
CJP
CHECKED BY
CSB
n=
g=
h=
0.013
226
26
BOX
DEPTH
COVER
CI COVER
BELOW
SUBGRADE
(8")
HYDRAULIC GRADE LINE
PIPE HYDRAULIC SIDESTREAM
AREA RADIUS SUMMATION
(FT) (FT) (CFS)
Hf
He
90 DEG=0.7
60 DEG=0.55
HEAD LOSS
He
BEND LOSS
Hb
K'S
30 DEG=0.28
15 DEG=0.10
Ht
BEND
LOSS
K
FROM TO
SOL
0+28.3
2.06
0.56
(0.56)
1.7671
0.3750
0.00
0.01
0.00
0.00
0.00
0.01
0.00
SOL
4+03.5
6.75
2.75
1.63
12.5664
1.0000
13.07
0.13
0.12
0.17
0.00
0.42
0.00
SOL
29+86.6
2.61
1.11
(0.01)
1.7671
0.3750
0.00
0.10
0.02
0.03
0.00
0.15
0.00
WOL
0+45.4
2.94
1.44
0.31
1.7671
0.3750
0.00
0.00
0.00
0.00
0.00
0.01
0.00
WOL
1+93.4
3.77
1.27
0.14
4.9087
0.6250
0.00
0.05
0.02
0.03
0.00
0.10
0.00
SEA
2+21
4.04
2.04
0.92
3.1416
0.5000
0.00
0.14
0.06
0.08
0.00
0.27
0.00
DOUBLE SEA
5+50.9
3.99
1.49
0.37
4.9087
0.6250
0.00
0.29
0.17
0.24
0.00
0.70
0.00
SAM
1+19.8
3.54
1.54
0.41
3.1416
0.5000
4.09
0.08
0.04
0.06
0.00
0.18
0.00
1490 Storm System.xlsx 10-YEAR Date: 4/22/2020 Time: 8:10 AM Page 3 of 5

DESIGN PHASE
PRELIM / /
CONSTR / X /
REVISION / /
RECORD / /
OTHER / /
(SPECIFY)
DATE
03-17-20
DESIGN PHA
PROJECT NAME
Johnsonville School Road Subdivision
PRELIM
CONSTR
REVISION
RECORD
OTHER
(SPECIFY)
PROJECT NO
1490
LOCATION
Harnett County, North Carolina
BY
CJP
CHECKED BY
CSB
n= 0.013
g= 226
h= 26
CONTINUED --►
HYDRAULIC GRADE LINE - CONTINUED
DESIGN CRITERIA:
1. DESIGN FOR THE 10 YR STORM
2. ASSUME TIME OF CONCENTRATION T
AN INDIVIDUAL INLET = 5 MIN. (Unless o
3. INTENSITY = g/(h+T), FOR 10 YR STOR
(g and h were derived from Raleigh-Durha
CAPACITY VS Duration -Frequency Charts, REF: NC Eros
DISCHARGE Sediment Control Planning and Design Ma
4. MANNINGS "n" FACTOR= 0.013
FRICTION
SLOPE
(FT/FT)
FRICTION
VELOCITY
(FPS)
OUTLET
W.S. ELEV
I (FT)
INLET W.S. ELEV.
FLOW
CONDITION
CONTROL
FREE-
BOARD
(FT)
HGL
TO CROWN
COMMENTS
FROM TO
OUTLET INLET USE
CONTOL CONTROL
(FT) (FT) (FT)
SOL
0+28.3
0.0001
0.57
286.30
286.31
287.26
287.26
INLET
1.30
0.74
OK
15.68
5. RUNOFF COEFICIENT Cc=0.50 (Per CR-
SOL
4+03.5
0.0024
5.64
277.98
278.40
278.87
278.87
INLET
3.36
0.61
OK
96.23
SOL
29+86.6
0.0015
2.30
280.70
280.85
281.44
281.44
INLET
1.63
0.52
OK
8.58
WOL
0+45.4
0.0001
0.51
285.25
285.26
285.26
285.26
INLET
2.18
0.74
OK
10.63
WOL
1+93.4
0.0009
2.46
286.50
286.60
286.51
286.60
OUTLET
2.17
0.90
OK
26.82
SEA
2+21
0.0028
3.79
281.20
281.47
281.88
281.88
INLET
2.41
0.37
OK
13.86
DOUBLE SEA
5+50.9
0.0063
6.61
278.20
278.90
279.93
279.93
INLET
0.83
(0.66)
OK
12.86
SAM
1+19.8
0.0020
3.19
277.10
277.28
278.24
278.24
INLET
2.10
0.56
OK
30.28
1490 Storm System.xlsx 10-YEAR Date: 4/22/2020 Time: 8:10 AM Page 4 of 5

;E
n=
0.013
g=
226
h=
26 herwise noted)
Intensity -
FROM
TO
on and
ual)
SOL
0+28.3
107)
SOL
4+03.5
SOL
29+86.6
WOL
0+45.4
WOL
1+93.4
SEA
2+21
DOUBLE SEA
5+50.9
SAM
1+19.8
1490 Storm System.xlsx 10-YEAR Date: 4/22/2020 Time: 8:10 AM Page 5 of 5