SW6220401_Design Calculations_20220621 (5)

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PROJECT NAME
Cameron Commercial
DATE
)3-16-22
PROJECT NO
1766
DESIGN PHASE
PRELIM
CONSTR / X /
REVISION
LOCATION
Harnett County, North Carolina
BY
CSB
RECORD
OTHER
CHECKED BY
(SPECIFY)
n= 0.013
9= 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
DI-1
DI-2
DI-1
0.30
0.92
2.01
0.00
0.00
2.01
0.30
5.00
0.00
5.00
7.29
0.92
DI-2
DI-3
DI-2
0.38
0.92
2.55
0.00
0.00
2.55
0.68
5.00
0.29
5.29
7.22
0.92
DI-3
CI-4
DI-3
0.30
0.92
2.01
0.00
0.00
2.01
0.98
5.00
0.57
5.57
7.16
0.92
CI-4
DI-5
CI-4
0.19
0.85
1.18
0.00
0.00
1.18
1.17
5.00
0.88
5.88
7.09
0.91
DI-5
SDMH-6
DI-5
0.10
0.65
0.47
0.00
0.00
0.47
1.27
5.00
1.42
6.42
6.97
0.89
SDMH-6
PO-7
SDMH-6
0.00
0.00
0.00
0.00
0.00
0.00
1.27
5.00
1.66
6.66
6.92
0.89
Roof Drain
SDMH-6
Roof Drain
0.39
0.95
2.70
0.00
0.00
2.70
0.39
5.00
0.00
5.00
7.29
0.95
RI-8
FES-9
RI-8
1766-Storm Drainage.As 10-YEAR Date: 6/21/2022 Time: 7:10 AM Page 1 of 4

• " I " `c
PROJECT NAME
Cameron Commercial
DATE
03-16-22
PROJECT NO
1766
DESIGN PHASE
PRELIM / /
CONSTR / X /
REVISION
LOCATION
Harnett County, North Carolina
BY
CSB
RECORD
OTHER
CHECKED BY
0
(SPECIFY)
n= 0.013
9= 226
h= 26
STORM DRAINAGE SCHEDULE - CONTINUED
Q
DISCHARGE
(CFS)
Q
SIDE-
STREAM
(CFS)
SLOPE
DIA.
(IN)
CAPACITY
(FULL)
(CFS)
V FULL
(FPS)
LENGTH
(FT)
SEGMENT
TIME
(MIN)
UPPER
INV.
(FT)
LOWER
INV.
(FT)
UPSTREAM
TOP
ELEV.
(FT)
FROM TO
CIA
DI-2
2.01
0.00
0.0050
15
4.6
3.7
64
0.29
322.00
321.68
325.54
DI-2
DI-3
4.52
0.00
0.0050
15
4.6
3.7
64
0.29
321.68
321.36
326.02
DI-3
CI-4
6.45
0.00
0.0050
18
7.4
4.2
76
0.30
321.11
320.73
326.52
CI-4
DI-5
7.54
0.00
0.0050
24
16.0
5.1
165
0.54
320.23
319.40
326.65
DI-5
SDMH-6
7.86
0.00
2.70
0.0052
24
16.3
5.2
77
0.25
319.40
319.00
328.07
SDMH-6
PO-7
10.51
0.0387
24
44.5
14.2
39
0.05
318.00
316.50
327.09
2.70
Roof Drain
SDMH-6
0.00
0.0101
15
6.5
5.3
238
0.75
325.50
323.10
RI-8
FES-9
3.33
0.0306
18
18.4
10.4
49
0.08
319.50
318.00
323.65
1766-Storm Dminagexls 10-YEAR Date: 6/21/2022 Time: 7:10 AM Page 2 of 4

• " ` `
PROJECT NAME
Cameron Commercial
`
DATE
03-16-22
PROJECT NO
1766
DESIGN PHASE
PRELIM
CONSTR
REVISION
/ /
/ X /
LOCATION
Harnett Count , North Carolina
BY
CSB
RECORD
OTHER
CHECKED BY
0
(SPECIFY)
n=
g=
h=
0.013
226
26
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
CONTINUED
FRICTION
SLOPE
(FT/FT)
FRICTION
VELOCITY
(FPS)
FROM TO
CIA
DI-2
1.2272
0.3125
0.00
0.06
0.01
0.01
0.00
0.09
0.10
0.0010
1.63
DI-2
DI-3
1.2272
0.3125
0.00
0.31
0.05
0.07
0.02
0.46
0.10
0.0049
3.67
DI-3
CI-4
1.7671
0.3750
0.00
0.29
0.05
0.07
0.02
0.43
0.10
0.0038
3.64
CI-4
DI-5
3.1416
0.5000
0.00
0.18
0.02
0.03
0.06
0.30
0.70
0.0011
2.39
DI-5
SDMH-6
3.1416
0.5000
0.00
0.09
0.02
0.03
0.01
0.16
0.10
0.0012
2.49
SDMH-6
PO-7
3.1416
0.5000
2.70
0.08
0.04
0.06
0.09
0.28
0.55
0.0021
3.33
Roof Drain
SDMH-6
1.2272
0.3125
0.00
0.41
0.02
0.03
0.04
0.50
0.55
0.0017
2.19
RI-8
FES-9
1.7671
0.3750
0.00
0.05
0.01
0.02
0.02
0.10
0.28
0.0010
1.88
1766-Storm Dminagexls 10-YEAR Date: 6/21/2022 Time: 7:10 AM Page 3 of 4

" I"`DESIGN
NAME
Commercial
7H.,'..ft
03-16-22
PROJECT NO
1766
PHASE
PRELIMCT
CONSTR / Xron
REVISIONION
County, North Carolina
BY
CSB
RECORD
OTHER
CHECKED BY
0
(SPECIFY)
n= 0.013
g= 226
h= 26
HYDRAULIC
GRADE LINE - CONTINUED
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)
OUTLET
W.S. ELEV
(FT)
INLET W.S. ELEV.
FLOW
CONDITION
CONTROL
FREE-
BOARD
(FT)
COMMENTS
FROM TO
OUTLET INLET USE
CONTOL CONTROL
(FT) (FT) (FT)
DI-1
DI-2
322.89
322.98
322.74
322.98
OUTLET
2.56
OK
DI-2
DI-3
322.44
322.89
322.89
322.89
OUTLET
3.13
OK
DI-3
CI-4
321.93
322.36
322.44
322.44
INLET
4.08
OK
CI-4
DI-5
321.44
321.74
321.48
321.74
OUTLET
4.91
OK
DI-5
SDMH-6
321.28
321.44 320.67
321.28 319.48
WATER SURFACE:
321.44
321.28
321.00
OUTLET
6.63
OK
SDMH-6
PO-7
321.00
OUTLET
5.81
OK
324.10
Roof Drain
SDMH-6
324.60
326.33
326.33
INLET
RI-8
FES-9
319.20
319.30
320.40
320.40
INLET
3.25
OK
EXISTING GROUND:
318.50
1766-Storm Drainage.As 10-YEAR Date: 6/21/2022 Time: 7:10 AM Page 4 of 4