SW6190602_Engineering Calculations (Storm Drains)_20190619

NAME
7Ed.rton Industrial Park Storm Pond
DATE
)5-23-19
PROJECT NO
1479
DESIGN PHASE
PRELIMCT
CONSTR / X
REVISIONION
North Carolina
BY
CSB
RECORDon,
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
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
RI-1
FES-2
RI-1
Storm Drainage.As 10-YEAR Date: 6/19/2019 Time: 7:51 PM Page 1 of 4

7NAME
7Ederton Storm Pond
DATE
5-23-19
DESIGN PHASE
PRELIM
CONSTR / Xark
REVISION
PROJECT NO
1479
BY
CSB
RECORDlina
OTHER
CHECKED BY
CSB
(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
RI-1
FES-2
39.49
0.00
0.0089
36
62.9
8.9
112
0.21
146.00
145.00
150.00
Starm Drainage.As 10-YEAR Date: 6/19/2019 Time: 7:51 PM Page 2 of 4

NAME
7Ed.rton Industrial Park Storm Pond
DATE
05-23-19
DESIGN PHASE
PRELIMCT
CONSTR / X
REVISIONION
PROJECT NO
1479
North Carolina
BY
CSB
RECORDon,
OTHER
CHECKED BY
CSB
(SPECIFY)
n= 0.013
g= 226
h= 26
HYDRAULIC GRADE LINE
PIPE HYDRAULIC SIDESTREAM
AREA RADIUS SUMMATION Hf
(FT) (FT) (CFS)
90 DEG=0.7
60 DEG=0.55
HEAD LOSS
He He
BEND LOSS
Hb
K'S
30 DEG=0.28
15 DEG=0.10
Ht
BEND
LOSS
K
CONTINUED
FRICTION FRICTION
SLOPE VELOCITY
(FT/FT) (FPS)
FROM TO
RI-1
FES-2
7.0686
0.7500
0.00
0.39
0.12
0.17
0.13
0.81
0.28
0.0035
5.55
Starm Drainage.As 10-YEAR Date: 6/19/2019 Time: 7:51 PM Page 3 of 4

"1"DATE
05-23-19
DESIGN PHASE
PRELIMCT
CONSTR / X
REVISIONION
NAME
7Ederton Industrial Park Storm Pond
PROJECT NO
1479
North Carolina
BY
CSB
RECORDon,
OTHER
CHECKED BY
CSB
(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)
RI-1
FES-2
147.40
148.21
148.85
148.85
INLET
1.15
Starm Drainagexls 10-YEAR Date: 6/19/2019 Time: 7:51 PM Page 4 of 4