SW6220904_Design Calculations_20221102 (4)

• " " ' " ' '
PROJECT NAME
Hidden Valley Subdivision
DATE
07-22-22
PROJECT NO
1860
DESIGN PHASE
PRELIM
CONSTR / X /
REVISION
LOCATION
Quewiffle Township, Raeford, NC
BY
BPB
RECORD
OTHER
CHECKED BY
CSB
(SPECIFY)
n= 0.013
9= 226
h= 26
STORM DRAINAGE SCHEDULE CONTINUED
AREAS
(INLETS)
INLET
AREA
(AC)
INLET
Cc
RUNOFF
COEFF.
INLET
ISCHARG
(CFS)
Q (+)
JPSTREAN
BYPASS
(CFS)
Q(-)
INLET
BYPASS
(CFS)
CAPTURED
INLET TOTAL
ISCHARG AREAS
(CFS) (AC)
INLET
TIME
(MIN)
PIPE
TIME
(MIN)
Tc
TIME
OF CONC.
(MIN)
I
INTENSITY
(IN/HR)
Cc
RUNOFF
COEFF.
FROM TO
OT-1
CI-2
OT-1
7.79
0.35
10.91
0.00
0.00
10.91
7.79
15.00
0.00
15.00
5.51
0.35
CI-2
CI-3
CI-2
0.25
0.65
0.65
0.00
0.00
0.65
8.04
5.00
0.06
15.06
5.50
0.36
CI-3
FES-4
CI-3
0.24
0.65
0.62
0.00
0.00
0.62
8.28
5.00
0.14
15.14
5.49
0.37
OT-5
CI-6
OT5
5.80
0.35
8.12
0.00
0.00
8.12
5.80
15.00
0.00
15.00
5.51
0.35
CI-6
CI-7
CI-6
1.15
0.50
2.30
0.00
0.45
1.85
6.95
5.00
0.06
15.06
5.50
0.37
CI-7
FES-8
CI-7
0.18
0.65
0.47
0.00
0.11
0.36
7.13
5.00
0.14
15.14
5.49
0.38
CI-9
CI-10
CI-9
1.00
0.55
2.65
0.45
0.63
2.02
1.00
5.00
0.00
5.00
7.29
0.55
CI-10
FES-11
CI-10
0.20
0.65
0.63
0.11
0.07
0.56
1.20
5.00
0.10
5.10
7.27
0.57
CI-12
CI-13
CI-12
1.00
0.50
2.63
0.63
0.62
2.01
1.00
5.00
0.00
5.00
7.29
0.50
CI-13
FES-14
CI-13
0.09
0.50
0.25
0.07
0.01
0.24
1.09
5.00
0.10
5.10
7.27
0.50
INLET
CI-15
INLET
22.27
0.35
31.18
0.00
0.00
31.18
22.27
15.00
0.00
15.00
5.51
0.35
CI-15
CI-16
CI-15
0.67
0.50
1.96
0.62
0.00
1.96
22.94
5.00
0.01
15.01
5.51
0.35
CI-16
FES-17
CI-16
0.14
0.65
0.38
0.01
0.00
0.38
23.08
5.00
0.08
15.08
5.50
0.36
CI-18
CI-19
CI-18
1.68
0.55
3.70
0.00
1.22
2.48
1.68
5.00
0.00
5.00
7.29
0.55
CI-19
FES-20
CI-19
0.26
0.65
0.68
0.00
0.09
0.59
1.94
5.00
0.05
5.05
7.28
0.56
CI-21
CI-22
CI-21
1.06
0.55
3.55
1.22
1.28
2.27
1.06
5.00
0.00
5.00
7.29
0.55
CI-22
FES-23
CI-22
0.11
0.65
0.29
0.00
0.02
0.27
1.17
5.00
0.10
5.10
7.27
0.56
CI-24
FES-25
CI-24
0.57
0.60
2.67
1.30
0.00
2.67
0.57
5.00
0.00
5.00
7.29
0.60
1860-Storm drainage.xim 10-YEAR Date: 11/2/2022 Time: 6:40 AM Page 1 of 4

" ' '
DATE
DESIGN PHASE
NAME
7H,dd.n Valle Subdivision
07-22-22
PROJECT NO
1860
PRELIMCT
CONSTR / X
REVISIONION
RECORDiffle
OTHER
(SPECIFY)
Township, Raeford, NC
BY
BPB
CHECKED BY
CSB
n= 0.013
9= 226
h= 26
STORM DRAINAGE SCHEDULE - CONTINUED
Q
ISCHARG
(CFS)
Q
SIDE-
STREAM
(CFS)
SLOPE
DIA.
(IN)
CAPACITY
(FULL)
(CFS)
V FULL
(FPS)
LENGTH
(FT)
SEGMENT
TIME
(MIN)
UPPER
INV.
(FT)
UPSTREA
LOWER TOP
INV. ELEV.
(FT) (FT)
FROM TO
6.0 22 0.06
337.20 340.00
337.05 340.82
336.78 340.82
334.20 337.00
334.05 338.01
333.80 338.01
OT-1
CI-2
15.03
0.00
0.0069
24
18.8
337.35
337.20
337.05
CI-2
CI-3
15.90
0.00
0.0057
24
17.0
5.4 27 0.08
CI-3
FES-4
16.73
0.00
0.0056
24
16.9
5.4 48 0.15
334.35
334.20
334.05
OT-5
CI-6
11.19
0.00
0.0069
24
18.8
6.0 22 0.06
CI-6
CI-7
14.34
0.00
0.0057
24
17.0
5.4 27 0.08
CI-7
FES-8
14.95
0.00
0.0052
24
16.3
5.2 48 0.15
5.6 34 0.10
324.80 330.00
323.50 329.79
321.95 326.99
321.65 326.99
CI-9
CI-10
4.01
0.00
0.0090
18
9.9
325.10
CI-10
FES-11
4.94
0.00
0.0406
18
21.2
12.0 32 0.04
324.80
CI-12
CI-13
3.65
0.00
0.0057
18
7.9
4.5 27 0.10
322.10
CI-13
FES-14
3.96
0.00
0.0056
18
7.8
4.4 54 0.20
321.95
22
27
56
324.70
324.51
324.51
INLET
CI-15
42.96
0.00
0.0759
36
183.7
26.0
0.01
321.50
319.85
CI-15
CI-16
44.80
0.00
0.0057
36
50.2
7.1
0.06
319.85
319.70
CI-16
FES-17
45.23
0.00
0.0054
36
48.8
6.9
0.14
319.70
319.40
9.6 27 0.05
321.00 326.58
317.30 326.58
315.65 320.77
315.40 320.77
CI-18
CI-19
6.74
0.00
0.0264
18
17.1
321.70
321.00
CI-19
FES-20
7.96
0.00
0.0771
18
29.2
16.5 48 0.05
315.80
CI-21
CI-22
4.25
0.00
0.0057
18
7.9
4.5 27 0.10
CI-22
FES-23
4.76
0.00
0.0052
18
7.6
4.3 48 0.19
315.65
10.7 48 0.07
310.50 315.24
CI-24
FES-25
2.49
0.00
0.0417
15
13.2
312.50
1860-Storm orainage.xim 10-YEAR Date: 11/2/2022 Time: 6:40 AM Page 2 of 4

n= 0.013
g= 226
h= 26
BEND LOSE K'S
90 DEG=0.7 30 DEG=0.28
0 DEG=0.55 15 DEG=0.10
Cl COVER
BOX COVER BELOW IDESTREAl BEND
DEPTH SUBGRADEiUMMATIO LOSS
(8") (CFS) K
FROM TO
OT-1
CI-2
2.65
(0.48)
0.00
0.10
CI-2
CI-3
3.62
0.50
0.00
0.10
CI-3
FES-4
3.77
0.65
0.00
0.10
OT-5
CI-6
2.65
(0.48)
0.00
0.10
CI-6
CI-7
3.81
0.68
0.00
0.10
CI-7
FES-8
3.95
0.83
0.00
0.10
CI-9
CI-10
4.90
2.27
0.00
0.10
CI-10
FES-11
4.99
2.36
0.00
0.10
CI-12
CI-13
4.89
2.26
0.00
0.10
CI-13
FES-14
5.04
2.42
0.00
0.10
INLET
CI-15
3.20
(0.93)
0.00
0.10
CI-15
CI-16
4.66
0.53
0.00
0.10
CI-16
FES-17
4.81
0.68
0.00
0.10
CI-18
CI-19
4.88
2.26
0.00
0.10
CI-19
FES-20
5.58
2.95
0.00
0.10
CI-21
CI-22
4.97
2.34
0.00
0.10
CI-22
FES-23
5.12
2.50
0.00
0.10
CI-24
FES-25
2.74
0.37
0.00
0.10
1860-Storm drainage.xim 10-YEAR Date: 11/2/2022 Time: 6:40 AM Page 3 of 4

NAME
NC
NO
BY
n= 0.013 HYDRAULIC GRADE LINE - CONTINUED
9= 226
h= 26
INLET W.S. ELEV.
OUTLET OUTLET INLET USE FLOW FREE- HGL
FROM TO W.S. ELEV CONTOL CONTROL CONDITIO BOARD FOCROWt COMMENTS CAPACITY VS
(FT) (FT) (FT) (FT) JCONTROL (FT) DISCHARGE
315.40
CI-24 FES-25 311.50 311.62 313.30 313.30 INLET 1.94 0.45 OK 10.69
310.50
DESIGN PHASE
PRELIM
CONSTR / X /
REVISION
RECORD
OTHER
(SPECIFY)
DESIGN CRITERIA:
1. DESIGN FOR THE 10 YR STORM
2. ASSUME TIME OF CONCENTRATION TO
AN INDIVIDUAL INLET = 5 MIN. (Unless otherwise noted)
3. INTENSITY = g/(h+T), FOR 10 YR STORM
(g and h were derived from Raleigh -Durham Intensity -
Duration -Frequency Charts, REF: NC Erosion and
Sediment Control Planning and Design Manual)
4. MANNINGS "n" FACTOR= 0.013
5. RUNOFF COEFICIENT Cc=0.50 (Per CR-7107)
5. RUNOFF COEFICIENT Cc=0.50 (Per CR-7107)
5. RUNOFF COEFICIENT Cc=0.50 (Per CR-7107)
5. RUNOFF COEFICIENT Cc=0.50 (Per CR-7107)
5. RUNOFF COEFICIENT Cc=0.50 (Per CR-7107)
5. RUNOFF COEFICIENT Cc=0.50 (Per CR-7107)
5. RUNOFF COEFICIENT Cc=0.50 (Per CR-7107)
5. RUNOFF COEFICIENT Cc=0.50 (Per CR-7107)
1860-Storm drainage.xim 10-YEAR Date: 11/2/2022 Time: 6:40 AM Page 4 of 4