SW6241006_Design Calculations_20241118 (6)

STORM DRAINAGE/HYDRAULIC GRADE LINE DATE DESIGN PHASE
ANALYSIS(1 09-23-24 PRELIM / /
PROJECT NAME PROJECT NO CONSTR / X /
Fayetteville Cumberland Road DG 2093 REVISION / /
LOCATION BY RECORD / /
Fayetteville,North Carolina CSB OTHER / /
CHECKED BY (SPECIFY)
CSB
n= 0.013 STORM DRAINAGE SCHEDULE CONTINUED P.
g= 226
h= 26
_ INLET Q(+) Q(-) CAPTURED Tc I Cc
INLET Cc INLET JPSTREAN INLET INLET TOTAL INLET PIPE TIME RUNOFF
FROM TO AREAS AREA RUNOFF )ISCHARGE BYPASS BYPASS )ISCHARGE AREAS TIME TIME OF CONC.INTENSITY COEFF.
(INLETS) (AC) COEFF. (CFS) (CFS) (CFS) (CFS) (AC) (MIN) (MIN) (MIN) (IN/HR)
DI-1 SDMH-3 DI-1 3.97 0.40 6.35 0.00 PI.00 6.35 3.97 5.00 0.00 15.00 5.28 0.40
SDMH-3 DI-8 SDMH-3 0.00 0.40 0.00 0.00 0.00 0.00 3.97 5.00 1.20 16.20 5.36 0.40
DI-8 CI#8441 DI-8 0.37 0.60 0.89 0.00 0.00 0.89 4.34 5.00 1.45 16.45 5.32 0.42
2093-Storm drainage.xlsx 10-YEAR Date:11/18/2024 Time:9:59 AM Page 1 of 4

STORM DRAINAGE/HYDRAULIC GRADE LII DATE DESIGN PHASE
ANALYSIS(10 YEAR) 09-23-24 PRELIM / /
PROJECT NAME PROJECT NO CONSTR / X /
Fayetteville Cumberland Road DG 2093 REVISION / /
LOCATION BY RECORD / /
Fayetteville,North Carolina CSB OTHER / /
CHECKED BY (SPECIFY)
CSB
n= 0.013 STORM DRAINAGE SCHEDULE-CONTINUED
g= 226 f
h= 26
Q Q UPSTREAM
SIDE- CAPACITY SEGMENT UPPER LOWER TOP
FROM TO )ISCHARGE STREAM SLOPE DIA. (FULL) V FULL LENGTH TIME INV. INV. ELEV.
(CFS) (CFS) (IN) (CFS) (FPS) (FT) (MIN) (FT) (FT) (FT)
DI-1 SDMH-3 8.38 0.00 0.0031 15 3.6 2.9 213 1.20 EMMEN= 187.20
SDMH-3 DI-8 8.50 0.00 0.0030 15 3.6 2.9 43 0.25 MM. 184.44 188.29
DI-8 CI#8441 9.64 0.00 0.0028 24 12.0 3.8 18 0.08 184.44 184.39 188.95
2093-Storm drainage.xlsx 10-YEAR Date:11/18/2024 Time:9:59 AM Page 2 of 4

BEND LOS; KS
n= 0.013 90 DEG=0.7 30 DEG=0.28
g= 226'0 DEG=0.55 15 DEG=0.10
h= 26
CI COVER
BOX COVER BELOW IDESTREA BEND
FROM TO DEPTH SUBGRADBUMMATIOI LOSS
I (8") (CFS) K
DI-1 SDMH-3 1.96 0.71 (0.42) 0.00 0.55
SDMH-3 DI-8 3.72 2.47 1.35 0.00 0.10
DI-8 CI#8441 4.51 2.51 1.38 0.00 0.10
2093-Storm drainage.xlsx 10-YEAR Date:11/18/2024 Time:9:59 AM Page 3 of 4

STORM DRAINAGE/HYDRAULIC GRADE LINE DATE DESIGN PHASE
ANALYSIS(10 YEAR) 09-23-24 PRELIM / /
PROJECT NAME PROJECT NO CONSTR / X /
Fayetteville Cumberland Road DG 2093 REVISION / //
LOCATION BY RECORD / /
Fayetteville,North Carolina CSB OTHER / /
CHECKED BY (SPECIFY)
CSB
DESIGN CRITERIA:
n= 0.013 HYDRAULIC GRADE LINE-CONTINUED 1.DESIGN FOR THE 10 YR STORM
g= 226 2.ASSUME TIME OF CONCENTRATION TO
h= 26 AN INDIVIDUAL INLET=5 MIN.(Unless otherwise noted)
INLET W.S.ELEV. 3.INTENSITY=g/(h+T),FOR 10 YR STORM
OUTLET OUTLET INLET USE 1 FLOW FREE- HGL (g and h were derived from Raleigh-Durham Intensity-
FROM TO W.S.ELEV CONTOL CONTROL CONDITIO BOARD 1-0 CROWN COMMENTS CAPACITY VS Duration-Frequency Charts,REF:NC Erosion and
(FT) (Fr) (FT) (FT) CONTROL (Fr) I DISCHARGE Sediment Control Planning and Design Manual)
4.MANNINGS"n"FACTOR=0.013
DI-1 SDMH-3 187.38 191.77 187.88 191.77 OUTLET (4.57) (5.28) OVERFLOW -4.76 5.RUNOFF COEFICIENT Cc=0.50(Per CR-7107)
SDMH-3 DI-8 186.12 187.38 187.27 187.38 OUTLET 0.91 (1.56) OK -4.94
DI-8 CI#8441 185.99 186.12 185.85 186.12 OUTLET 2.83 0.32 OK 2.35
EXISTING INV OUT 184.39
2093-Storm drainage.xlsx 10-YEAR Date:11/18/2024 Time:9:59 AM Page 4 of 4