SW4220801_Design Calculations_20221208

CaIOEESIGN &
ENGINEERING, PLLC
CLIENT -FOCUSED • COMPREHENSIVE • COST-EFFECTIVE
2537E. LYON STATION RD, STE 102
PO BOX 361
CREEDMOOR, NC 27522
919 230-0996
DITCH/DIVERSION

Diversion / Ditch Schedule
Name
Q25
c s
V25
s
Sies opes
X.17
Slope (%)
Depth (ft)
Flow Dept
Shear Stress
s
Lining
TD-1 /PD-1
2.56
3.04
3
4.20%
1.50
0.53
1.39
NAG-DS75
TD-2 / PD-2
7.71
3.64
3
3.25%
1.50
0.84
1.71
NAG-DS150
TD-3
7.21
2.65
3
1.45%
1.50
0.95
0.86
NAG-DS75
TD-4
2.03
2.77
3
3.83%
1.50
0.49
1.18
NAG-DS75

DESIGN AIL
2537 E. Lyon Station Road
Suite 102, PO Box0361
FIRM LICA
ENGINEERING, RLLC
Creedmoor, NC 27522
P-1764
919-230-0996
Project NO:
21-026
Calculated/
Joel H. Sain, EIT
Project Name:
Newlin Meadow
Prepared by:
Mineral Springs Road
Project Location:
Checked by:
Chad E. Abbott, PE
Graham, NC 27253
Diversion / Ditch Schedule Calculations
Diversion / ditch name:
TD-1 / PD-1
Drainage area (A)
28,836 sf
0.66
ac
Impervious area
11,065 sf
0.25
ac
Impervious coefficient number (Cj
0.95
Pervious area
17,771 sf
0.41
ac
Pervious coefficient number (C2)
0.20
Diversion / ditch coefficient number (Cc)
0.49
Intensity (1)
7.92
in/hr
Peak flow (Q25); Q = C x I x A = 1.49 / n x AW x R2/3
x S0.5
2.56
cfs
Start elevation 558.00
Stop elevation
525.00
Length 786 ft
Slope (S)
4.20%
Sideslopes (X:1) 3
n-value
0.04
Wet area (AW) 0.84 sf
Wet parameter (Wp)
3.35
ft
Hydrulic radius (R) 0.25 ft
Total Depth
1.50
ft
Depth of flow 0.53 ft
Shear stress
1.39
Ibs/sf
Free board 0.97 ft
Velocity (V25)
3.04
ft/s
Lining:
NAG-DS75
Diversion / ditch name:
TD-2 / PD-2
Drainage area (A)
96,141 sf
2.21
ac
Impervious area
30,929 sf
0.71
ac
Impervious coefficient number (Cj
0.95
Pervious area
65,212 sf
1.50
ac
Pervious coefficient number (C2)
0.20
Diversion / ditch coefficient number (Cc)
0.44
Intensity (1)
7.92
in/hr
Peak flow (Q25); Q = C x I x A = 1.49 / n x AW x R2/3
x S0.5
7.71
cfs
Start elevation 558.00
Stop elevation
530.00
Length 861 ft
Slope (S)
3.25%
Sideslopes (X:1) 3
n-value
0.04
Wet area (AW) 2.12 sf
Wet parameter (WO
5.32
ft
Hydrulic radius (R) 0.40 ft
Total Depth
1.50
ft
Depth of flow 0.84 ft
Shear stress
1.71
Ibs/sf
Free board 0.66 ft
Velocity (V25)
3.64
ft/s
Lining:
NAG-DS150

DESIGN &
2537 E. Lyon Station Road
Suite 102, PO Box0361
FIRM LICA
ENGINEERING, FLLC
Creedmoor, NC 27522
P-1764
919-230-0996
Project NO:
21-026
Calculated/
Joel H. Sain, EIT
Project Name:
Newlin Meadow
Prepared by:
Mineral Springs Road
Project Location:
Checked by:
Chad E. Abbott, PE
Graham, NC 27253
Diversion / Ditch Schedule Calculations
Diversion / ditch name:
TD-3
Drainage area (A)
85,833 sf
1.97
ac
Impervious area
30,000 sf
0.69
ac
Impervious coefficient number (Cj
0.95
Pervious area
55,833 sf
1.28
ac
Pervious coefficient number (C2)
0.20
Diversion / ditch coefficient number (Cc)
0.46
Intensity (1)
7.92
in/hr
Peak flow (Q25); Q = C x I x A = 1.49 / n x AW x R2/3
x S0.5
7.21
cfs
Start elevation 531.50
Stop elevation
530.00
Length 103 ft
Slope (S)
1.45%
Sideslopes (X:1) 3
n-value
0.04
Wet area (AW) 2.73 sf
Wet parameter (Wp)
6.03
ft
Hydrulic radius (R) 0.45 ft
Total Depth
1.50
ft
Depth of flow 0.95 ft
Shear stress
0.86
Ibs/sf
Free board 0.55 ft
Velocity (V25)
2.65
ft/s
Lining:
NAG-DS75
Diversion / ditch name:
TD-4
Drainage area (A)
36,950 sf
0.85
ac
Impervious area
5,000 sf
0.11
ac
Impervious coefficient number (Cj
0.95
Pervious area
31,950 sf
0.73
ac
Pervious coefficient number (C2)
0.20
Diversion / ditch coefficient number (Cc)
0.30
Intensity (1)
7.92
in/hr
Peak flow (Q25); Q = C x I x A = 1.49 / n x AW x R2/3
x S0.5
2.03
cfs
Start elevation 558.00
Stop elevation
525.00
Length 861 ft
Slope (S)
3.83%
Sideslopes (X:1) 3
n-value
0.04
Wet area (AW) 0.73 sf
Wet parameter (WO
3.12
ft
Hydrulic radius (R) 0.23 ft
Total Depth
1.50
ft
Depth of flow 0.49 ft
Shear stress
1.18
Ibs/sf
Free board 1.01 ft
Velocity (V25)
2.77
ft/s
Lining:
NAG-DS75

TEMPORARY
Designip
Product Description
Longevity
Applications
Permissible Shear
lbs/ft'
Velocity ft/s (m/s)
ERONET
Stress (Pa)
-'
IS lb., accelerated photodegradable, polypropylene
days
45 d
Low Flow Channels
Unvegetated 1.55 (74)
Unvegetated 5.0 (1.52)
top net, 100 % straw fiber matrix
4:1 - 3:1 Slopes
Ib., 5
Moderate Flow Channels
;-!
1.S photodegradable, polypropylene top
60 days
Unvegetated 1.75 (84)
Unvegetated 6.0 (1.83)
bottom net, 100 %straw fiber matrix
3:1 - 2:1 Slopes
0s150
1.S lb., photodegradable, polypropylene top net,
12 months
Low Flow Channels
Unvegetated 1.55 (74)
Unvegetated S.0 (1.52)
100 % straw fiber matrix
4:1 - 3:1 Slopes
S75
IS lb., photodegradable, polypropylene top 5
12 months
Moderate Flow Channels
Unvegetated 1.75 (84)
Unvegetated 6.0 (1.83)
bottom net, 100 % straw fiber matrix
3:1 - 2:1 Slopes
50
kkI
2.9 lb., UV -stable polypropylene top net,
70 %straw/30 % coconut fiber matrix, 1.5 lb.,
24 months
Medium Flow Channels
Unvegetated 2.0 (96)
Unvegetated 8.0 (2A4)
photodegradable polypropylene bottom net
2:1diu Slopes
SG1so
00
2.9 lb., UV stable polypropylene top 5 bottom nets,
36 months
High Flow Channels
Unvegetated 2.25 (108)
Unvegetated 10.0 (3.05)
100 % coconut fiber matrix
1:1 and Greater Slopes
C125
BIONET
-�
9.3 lb., leno woven biodegradable jute top net,
12 months
Low Flow Channels
Unvegetated 1.60 (76)
Unvegetated 5.0 (1.52)
.
100 % straw fiber matrix
4:1 - 3:1 Slopes
S75BN
op
9.3 lb., leno woven biodegradable jute top net, 100%
fiber 7.7lb., biodegradable
12
Moderate Flow Channels
Unvegetated 1.85 (88)
Unvegetated 6.0 (1.83)
straw matrix, woven jute
bottom net
months
3:1 - 2:1 Slopes
S150BN
9.3 lb., leno woven biodegradable jute top net, 70 %
Medium Flow Channels
straw/30%coconut fiber matrix, 7.7lb., woven
18 months
Unvegetated 2.10 (100)
Unvegetated 8.0 (2A4)
biodegradable jute bottom net
2:1-1:1 Slopes
SC150BN

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1 A -
(DESIGN & I USGS MAP
ENGINEERING, I-LLC
PROJECT #: 21-026
NEWLIN MEADOWS SUB. PH II