SW6230703_Design Calculations_20231030

BRAYDEN PRESERVE SUBDIVISION
STORM WATER CALCULATIONS
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STORM DRAINAGE/HYDRAULIC GRADE LINE DATE DESIGN PHASE
ANALYSIS(10 YEAR) 1-17-2023 PRELIM / /
PROJECT NAME PROJECT NO CONSTR / X/
BAYWOOD FOREST SUBDIVISION 1916 REVISION / //
LOCATION BY RECORD / /
Cumberland County,North Carolina BPB OTHER / //
CHECKED BY (SPECIFY)
CSB
n= 0.013 STORM DRAINAGE SCHEDULE CONTINUED —r.226
h= 26
INLET 0(+) Q(-) CAPTURED Tc I Cc
INLET Cc INLET UPSTREAM INLET INLET TOTAL INLET PIPE TIME RUNOFF
FROM TO AREAS AREA RUNOFF DISCHARGE BYPASS BYPASS DISCHARGE AREAS TIME TIME OF CONC. INTENSITY COEFF.
(INLETS) (AC) COEFF. (CFS) (CFS) (CFS) (CFS) (AC) (MIN) (MIN) (MIN) (IN/HR)
PIPE 1 IN PIPE 1 OUT PIPE 1 IN
PIPE 2 IN PIPE 2 OUT PIPE 2 IN
PIPE 3 IN PIPE 3 OUT PIPE 3 IN
1916-Storm Drainage for Spread.xls 10-YEAR Date:10/30/2023 Time:12:02 PM Page 1 of 4

STORM DRAINAGE/HYDRAULIC GRADE LINE DATE DESIGN PHASE
ANALYSIS(10 YEAR) 1-17-2023 PRELIM / /
PROJECT NAME PROJECT NO CONSTR / X/
BAYWOOD FOREST SUBDIVISION 1916 REVISION / //
LOCATION BY RECORD / /
Cumberland County,North Carolina BPB OTHER / //
CHECKED BY (SPECIFY)
CSB
n= 0.013 STORM DRAINAGE SCHEDULE-CONTINUED
g= 226
h= 26
Q Q UPSTREAM
SIDE- CAPACITY SEGMENT UPPER LOWER TOP
FROM TO DISCHARGE STREAM SLOPE DIA. (FULL) V FULL LENGTH TIME INV. INV. ELEV.
(CFS) (CFS) (IN) • (CFS) (FPS) (FT) (MIN) (FT) (FT) (FT)
PIPE 1 IN PIPE 1 OUT 1.73 0.00 0.0058 18 8.0 4.5 52 0.19 129.55 129.25 132.00
PIPE 2 IN PIPE 2 OUT 1.20 0.00 0.0052 18 7.6 4.3 48 0.19 129.70 129.45 132.50
PIPE 3 IN PIPE 3 OUT 7.64 0.00 0.0050 18 7.4 4.2 40 0.16 128.00 127.80 130.10
1916-Storm Drainage for Spread.ols 10-YEAR Date.10/30/2023 Time.12.02 PM Page 2 of 4

STORM DRAINAGE/HYDRAULIC GRADE LINE DATE DESIGN PHASE
ANALYSIS(10 YEAR) 1-17-2023 PRELIM / /
PROJECT NAME PROJECT NO CONSTR / X/
BAYWOOD FOREST SUBDIVISION 1916 REVISION / //
LOCATION BY RECORD / /
Cumberland County,North Carolina BPB OTHER / //
CHECKED BY (SPECIFY)
CSB
n= 0.013 HYDRAULIC GRADE LINE CONTINUED -r.
g= 226 BEND LOSS K'S
h= 26 90 DEG=0.7 30 DEG=0.28
60 DEG=0.55 15 DEG=0.10
PIPE HYDRAULIC SIDESTREAM HEAD LOSS BEND FRICTION FRICTION
FROM TO AREA RADIUS SUMMATION Hf He He Hb Ht LOSS SLOPE VELOCITY
(FT) (FT) (CFS) K (FT/FT) (FPS)
PIPE 1 IN PIPE 1 OUT 1.7671 0.3750 0.00 0.01 0.00 0.01 0.00 0.02 0.10 0.0003 0.97
PIPE 2 IN PIPE 2 OUT 1.7671 0.3750 0.00 0.01 0.00 0.00 0.00 0.01 0.10 0.0001 0.68
PIPE 3 IN PIPE 3 OUT 1.7671 0.3750 0.00 0.21 0.07 0.10 0.03 0.41 0.10 0.0053 4.31
1916-Storm Drainage for Spread.xls 10-YEAR Date:10/30/2023 Time:12:02 PM Page 3 of 4

STORM DRAINAGE/HYDRAULIC GRADE LINE DATE DESIGN PHASE
ANALYSIS(10 YEAR) 1-17-2023 PRELIM / /
PROJECT NAME PROJECT NO CONSTR / X/
BAYWOOD FOREST SUBDIVISION 1916 REVISION / //
LOCATION BY RECORD / /
Cumberland County,North Carolina BPB 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 FLOW FREE- (g and h were derived from Raleigh-Durham Intensity-
FROM TO W.S.ELEV CONTOL CONTROL CONDITION I BOARD COMMENTS Duration-Frequency Charts,REF:NC Erosion and
(FT) (FT) (FT) (FT) CONTROL (FT) Sediment Control Planning and Design Manual)
4.MANNINGS"n"FACTOR=0.013
PIPE 1 IN PIPE 1 OUT 130.45 130.47 130.34 130.47 OUTLET 1.53 OK 5.RUNOFF COEFICIENT Cc=0.50(Per CR-7107)
PIPE 2 IN PIPE 2 OUT 130.65 130.66 130.47 130.66 OUTLET 1.84 OK
PIPE 3 IN PIPE 3 OUT 129.00 129.41 129.56 129.56 INLET 0.54 OK
1916-Storm Drainage for Spread.ols 10-YEAR Data:10/30/2023 Time:12:02 PM Page 4 of 4

1916-BAYWOOD FOREST SUBDIVISION
EC Matting Calculations
Ditch#1
nNorth American Green ECMDS Version 4.3-Channel Protection Design,Output Form
File Specifications Options Help
'ENGLISH. (USER I 1/17/2023 03:40 PM
HYDRAULIC RESULTS
Discharge Peak Flow 'Velocity(fps) Area(sq.ft) Hydraulic Normal Unreinforced Vegetation(n=0.040)
(cfs) Period(hrs), Radius(ft) ., Depth(ft)
0.8 0.1 1.02 0.79 0.24 0.44
S=0.0050
1 L Bottom _I 1
3.0 Width=0.50 ft 3.0
LINER RESULTS Not to Scale
Matting Type Vegetation Characteristics
Reach Stability Analysis Permissible Calculated Safety Factor Remarks
Staple Pattern ' 'Phase Class Type Density Shear Stress Shear Stress
(psi) (psi)
Straight Unreinforced Vegetation D Bunch 50-75% 3.33 0.14 24.53 STABLE
Soil Sandy Loam 0.035 0.012 2.83 STABLE
Ditch#2
n North American Green ECMDS Version 4.3-Channel Protection Design,Output Form
File Specifications Options Help
'ENGLISH. 'USER I 1/17/2023 03:41 PM I
HYDRAULIC RESULTS
Discharge Peak Flow Velocity(fps) Area(sq.ft) Hydraulic Normal Unreinforced Vegetation(n=0.040)
(cfs) Period(hrs) Radius(ft) Depth(ft)
114 0.1 1.55 0.26 0.14 0.22
S=0.0250
1 L Bottom _1 1
3.0 Width=0.50 ft 3.0
LINER RESULTS Not to Scale
Matting Type Vegetation Characteristics
Reach Stability Analysis Permissible Calculated Safety Factor Remarks
Staple Pattern Phase Class Type Density Shear Stress Shear Stress
(psi) (psi)
Straight Unreinforced Vegetation D Bunch 50-75% 3.33 0.35 9.64 STABLE
Soil Sandy Loam 0.035 0.032 1.11 STABLE

Ditch#3
III North American Green ECMDS Version 4.3-Channel Protection Design,Output Form
File Specifications Options Help
(ENGLISH. IUSER I 1/17/2023 03:42 PM I
HYDRAULIC RESULTS
Discharge Peak Flow Velocity(fps) Area(sq.ft) Hydraulic Normal Unreinforced Vegetation(n=0.040)
(cfs) Period(hrs) Radius(ft) , Depth(ft) I I
0.3 0.1 1.44 0.21 0.12 0.19
S=0.0250
1 L Bottom _1 1
3.0 Width=0.50 ft 3.0
LINER RESULTS Not to Scale
Matting Type Vegetation Characteristics
Reach Stability Analysis Permissible Calculated Safety Factor Remarks
Staple Pattern ' Phase Class Type Density Shear Stress Shear Stress
(psf) (psi)
Straight Unreinforced Vegetation D Bunch 50.75% 3• .33 0.30 11.05 _ STABLE _
Soil Sandy Loam 0.035 0.028 1.27 STABLE
Ditch#4
Q North American Green ECMDS Version 4.3-Channel Protection Design,Output Form
File Specifications Options Help
ENGLISH. IUSER I 11/17/2023 03:43 PM
HYDRAULIC RESULTS
Discharge Peak Flow Velocity(fps) Area(sq.ft) Hydraulic Normal Unreinforced Vegetation(n=0.040)
(cfs) Period(hrs) Radius(ft) Depth(ft)
1.2 0.1 2.06 0.58 0.21 0.37
S=0.0250
1 L Bottom _I 1
3.0 Width=0.50 ft 3.0
LINER RESULTS Not to Scale
Matting Type Vegetation Characteristics
Reach Stability Analysis Permissible Calculated Safety Factor Remarks
Staple Pattern Phase Class Type Density Shear Stress Shear Stress
(psi) (psi)
Straight Unreinforced Vegetation D Bunch 50.75% 3.33 0.57 5.84 STABLE
Soil Sandy Loam 0.035 0.052 0.67 UNSTABLE

. North American Green ECMDS Version 4.3-Channel Protection Design,Output Form
File Specifications Options Help
'ENGLISH. IUSER I 1/17/2023 03:44PM
HYDRAULIC RESULTS
Discharge Peak Flow Velocity(fps) Area(sq.ft) Hydraulic Normal S75(n=0.055)
(cfs) Period(hrs) Radius(ft) , Depth(ft)
11.2 0.1 1.62 0.74 0.23 0.42
S =0.0250
1 L Bottom _1 1
3.0 Width=0.50 ft 3.0
LINER RESULTS Not to Scale
Matting Type Vegetation Characteristics
Reach Stability Analysis Permissible Calculated Safety Factor Remarks
Staple Pattern ' Phase Class Type Density Shear Stress Shear Stress
(psi) (psf)
Straight S75 Unvegetated 1.55 0.66 2.37 STABLE
Staple D
Ditch#5
nNorth American Green ECMDS Version 4.3-Channel Protection Design,Output Form
File Specifications Options Help
'ENGLISH. IUSER I 1/17/2023 03:45PM
HYDRAULIC RESULTS
Discharge Peak Flow Velocity(fps) Area(sq.ft) Hydraulic Normal Unreinforced Vegetation(n=0.040)
(cfs) Period(hrs). Radius(ft) Depth(ft) I I
2.6 0.1 2.50 1.04 0.28 0.51
S=0.0250
1 L Bottom _I 1
3.0 Width=0.50 ft 3.0
LINER RESULTS Not to Scale
Matting Type Vegetation Characteristics
Reach Stability Analysis Permissible Calculated Safety Factor Remarks
Staple Pattern- Phase Class Type Density Shear Stress Shear Stress
(psi) (psi)
Straight Unreinforced Vegetation D Bunch 50-75% 3.33 0.80 4.18 STABLE
Soil Sandy Loam 0.035 0.073 0.48 UNSTABLE

• III North American Green ECMDS Version 4.3-Channel Protection Design,Output Form
File Specifications Options Help
(ENGLISH. IUSER I 1117I2023 03:45 PM
HYDRAULIC RESULTS
Discharge Peak Flow Velocity(fps) Area(sq.ft) Hydraulic Normal S75(n=0.053)
(cfs) Period(hrs). Radius(ft) . Depth(ft) I I
2.6 0.1 2.02 1.29 0.31 0.58
S=0.0250
1 L Bottom _I 1
3.0 Width=0.50 ft 3.0
LINER RESULTS Not to Scale
Matting Type Vegetation Characteristics
Reach Stability Analysis Permissible Calculated Safety Factor Remarks
Staple Pattern Phase Class Type Density Shear Stress Shear Stress
(psi) (psi)
Straight S75 Unvegetated 1.55 0.90 1.72 STABLE
Staple D
Ditch#6
LI North American Green ECMDS Version 4.3-Channel Protection Design,Output Form
File Specifications Options Help
(ENGLISH. (USER ( 1l1712023 03:46 PM I
HYDRAULIC RESULTS
Discharge Peak Flow Velocity(fps) Area(sq.ft) - Hydraulic Normal Unreinforced Vegetation(n=0.040)
(cfs) Period(hrs) Radius(ft) _ Depth(ft) I
3.8 0.2 2.53 1.50 0.34 0.63
S =0.0200
1 L Bottom _I 1
3.0 Width=0.50 ft 3.0
LINER RESULTS Not to Scale
Matting Type Vegetation Characteristics
Reach Stability Analysis Permissible Calculated Safety Factor Remarks
Staple Pattern Phase Class Type Density Shear Stress Shear Stress
(psi) (psi)
Straight Unreinforced Vegetation D Bunch 50-75% 3.33 0.78 4.25 STABLE
Soil Sandy Loam 0.035 0.072 0.49 UNSTABLE

III North American Green ECMDS Version 4.3-Channel Protection Design,Output Form
File Specifications Options Help
IENGLISH. [USER 1 1/17/2023 03:47 PM 1
HYDRAULIC RESULTS
Discharge Peak Flow Velocity(fps) Area(sq.ft) Hydraulic Normal S75(n=0.051)
(cis) _Period(hrs) _ Radius(ft) . Depth(ft)
3.8 0.2 2.12 1.79 0.37 0.69
S=0.0200
1 L Bottom _I 1
3.0 Width=0.50 ft 3.0
LINER RESULTS Not to Scale
Matting Type Vegetation Characteristics
Reach Stability Analysis Permissible Calculated Safety Factor Remarks
Staple Pattern Phase Class Type Density Shear Stress Shear Stress
(psi) (psi)
Straight S75 Unvegetated 1.55 0.87 1.79 STABLE
Staple D
Ditch#7
g North American Green ECMDS Version 4.3-Channel Protection Design,Output Form
File Specifications Options Help
'ENGLISH. (USER I 1/17/2023 03:48 PM 1
HYDRAULIC RESULTS
Discharge Peak Flow Velocity(fps) Area(sq.ft) Hydraulic Normal Unreinforced Vegetation(n=0.040)
(cis) Period(hrs) , Radius(ft) ., Depth(ft)
13.8 0.1 2.95 1.29 0.31 0.58
S=0.0300
1 L Bottom _I 1
3.0 Width=0.50 ft 3.0
LINER RESULTS Not to Scale
Matting Type Vegetation Characteristics
Reach Stability Analysis Permissible Calculated Safety Factor Remarks
Staple Pattern ' Phase Class Type Density Shear Stress Shear Stress
(psi) (psi)
Straight Unreinforced Vegetation D Bunch 50.75% 3.33 1.08 3.08 STABLE
Soil Sandy Loam 0.035 0.099 0.35 UNSTABLE

• North American Green ECMDS Version 4.3-Channel Protection Design,Output Form
File Specifications Options Help
'ENGLISH. (USER I 1/17/2023 03:48PM
HYDRAULIC RESULTS
Discharge Peak Flow Velocity(fps) Area(sq.ft) Hydraulic Normal S75(n=0.052)
(cfs) Period(hrs) Radius(ft) , Depth(ft) I
3.8 0.1 2.43 1.56 0.34 0.64
S=0.0300
1 L Bottom _I 1
3.0 Width=0.50 ft 3.0
LINER RESULTS Not to Scale
Matting Type Vegetation Characteristics
Reach Stability Analysis Permissible Calculated Safety Factor Remarks
Staple Pattern Phase Class Type Density Shear Stress Shear Stress
(psi) (psi)
Straight S75 Unvegetated , 1.55 1.20 1.29 STABLE
Staple D
Ditch#8
LINorth American Green ECMDS Version 4.3-Channel Protection Design,Output Form
File Specifications Options Help
'ENGLISH. (USER I 1/17/2023 03:49 PM
HYDRAULIC RESULTS
Discharge Peak Flow Velocity(fps) Area(sq.ft) -Hydraulic ` Normal Unreinforced Vegetation(n=0.040)
(cfs) Period(hrs) Radius(ft) . Depth(ft)
3.5 0.1 2.48 1.41 0.32 0.61
S =0.0200
1 L Bottom _I 1
3.0 Width=0.50 ft 3.0
LINER RESULTS Not to Scale
Matting Type Vegetation Characteristics
Reach Stability Analysis Permissible Calculated Safety Factor Remarks
Staple Pattern 1 Phase Class Type Density Shear Stress Shear Stress
(psi) (psi)
Straight Unreinforced Vegetation D Bunch 50.75%. 3.33 - 0.76 4.39 STABLE
Soil Sandy Loam 0.035 0.069 0.51 UNSTABLE

IIINorth American Green ECMDS Version 4.3-Channel Protection Design,Output Form
File Specifications Options Help
(ENGLISH. IUSER I 1/17/2023 03:50 PM
HYDRAULIC RESULTS
Discharge Peak Flow Velocity(fps) Area(sq.ft) Hydraulic Normal S75(n=0.051)
(cfs) Period(hrs) Radius(ft) Depth(ft)
3.5 0.1 2.07 1.69 0.36 0.67
S=0.0200
1 L Bottom _I 1
3.0 Width=0.50 ft 3.0
LINER RESULTS Not to Scale
Matting Type Vegetation Characteristics
Reach Stability Analysis Permissible Calculated Safety Factor Remarks
Staple Pattern Phase Class Type Density Shear Stress Shear Stress
(psi) (psi)
,
Straight S75 Unvegetated 1.55 0.84 1.85 STABLE
Staple D
Ditch#9
LINorth American Green ECMDS Version 4.3-Channel Protection Design,Output Form
File Specifications Options Help
(ENGLISH. (USER I 11/17/2023 03:50 PM
HYDRAULIC RESULTS
Discharge Peak Flow Velocity(fps) Area(sq.ft) Hydraulic Normal Unreinforced Vegetation(n=0.040)
(cfs) ,Period(hrs). , Radius(ft) , Depth(ft) I I
11.5 0.1 2.64 1.70 0.36 0.67
S=0.0200
1 L Bottom 1
3.0 Width=0.50 ft 3.0
LINER RESULTS Not to Scale
Matting Type Vegetation Characteristics
Reach Stability Analysis Permissible Calculated Safety Factor Remarks
Staple Pattern Phase Class Type Density Shear Stress Shear Stress
(psi) (psi)
Straight Unreinforced Vegetation D Bunch 50-75% 3.33 0.84 3.96 STABLE
Soil Sandy Loam 0.035 0.077 0.46 UNSTABLE

1111 North American Green ECMDS Version 4.3-Channel Protection Design,Output Form
File Specifications Options Help
'ENGLISH. (USER I 1/17/2023 03:51 PM I
HYDRAULIC RESULTq
Discharge Peak Flow 'Velocity(fps) Area(sq.ft) Hydraulic Normal S75(n=0.050)
(cfs) Period(hrs)- Radius(ft) . Depth(ft) I I
4.5 0.1 2.25 2.00 0.39 0.74
S =0.0200
1 L Bottom 1
3.0 Width=0.50 ft 3.0
LINER RESULTS Not to Scale
Matting Type Vegetation Characteristics
Reach Stability Analysis Permissible Calculated Safety Factor Remarks
Staple Pattern 1 Phase Class Type Density Shear Stress Shear Stress
(psi) (psf)
Straight S75 Unvegetated 1.55 0.92 1.68 : STABLE
Staple D
Ditch#10
II North American Green ECMDS Version 4.3-Channel Protection Design,Output Form
File Specifications Options Help
'ENGLISH. IUSER I 1/17/2023 03:52 PM I
HYDRAULIC RESULTS
Discharge Peak Flow Velocity(fps) Area(sq.ft) Hydraulic Normal Unreinforced Vegetation(n=0.040)
(cfs) Period(hrs), , Radius(ft) , Depth(ft) I I
0.9 0.1 1.58 0.57 0.20 0.36
S=0.0150
1 L Bottom _I 1
3.0 Width=0.50 ft 3.0
LINER RESULTS Not to Scale
Matting Type Vegetation Characteristics
Reach Stability Analysis Permissible Calculated Safety Factor Remarks
Staple Pattern 1 Phase Class Type Density Shear Stress Shear Stress
(psi) (psi)
Straight Unreinforced Vegetation D Bunch 50.75% 3.33 0.34 9.88 STABLE
Soil Sandy Loam 0.035 0.031 1.14 STABLE

Ditch#11
n North American Green ECMDS Version 4.3-Channel Protection Design,Output Form
File Specifications Options Help
ENGLISH. (USER I 11/17/202311-. 1v11
HYDRAULIC RESULTS
Discharge Peak Flow Velocity(fps) Area(sq.ft) Hydraulic Normal Unreinforced Vegetation(n 0.040)
(cfs) _Period[hrs) , Radius(ft) Depth(ft)
11.2 0.1 2.20 0.54 0.20 0.35
S =0.0300
1 L Bottom _1 1
3.0 Width=0.50 ft 3.0
LINER RESULTS Not to Scale
Matting Type Vegetation Characteristics
Reach Stability Analysis Permissible Calculated Safety Factor Remarks
Staple Pattern ' Phase Class Type Density Shear Stress Shear Stress
(psf) (psf)
Straight Unreinforced Vegetation D Bunch 50.75% 3.33 0.66 5.07 STABLE
Soil Sandy Loam 0.035 0.060 0.58 UNSTABLE
III North American Green ECMDS Version 4.3-Channel Protection Design,Output Form
File Specifications Options Help
(ENGLISH. IUSER I 1/17/2023 03:53 PM
HYDRAULIC RESULTS
Discharge Peak Flow Velocity(fps) Area(sq.ft) Hydraulic Normal S75(n=0.055)
., (cfs) Period(hrs) Radius(ft) _ Depth(ft)
1.2 0.1 1.74 0.69 0.23 0.40
S=0.0300
1 L Bottom _i 1
3.0 Width=0.50 ft 3.0
LINER RESULTS Not to Scale
Matting Type Vegetation Characteristics
Reach Stability Analysis Permissible Calculated Safety Factor Remarks
Staple Pattern Phase Class Type Density Shear Stress Shear Stress
(psi) (psi)
Straight S75 Unvegetated 1.55 0.76 2.05 STABLE
Staple D

Ditch#12
IN North American Green ECMDS Version 4.3-Channel Protection Design,Output Form
File Specifications Options Help
(ENGLISH. IUSER I 1/17/2023 03:54 PM
HYDRAULIC RESULTS
Discharge Peak Flow Velocity(fps) Area(sq.ft) Hydraulic Normal Unreinforced Vegetation(n=0.040)
(cfs) Period(hrs). Radius(ft) Depth(ft) I I
10.1 0.2 1.93 5.24 0.63 1.24
S=0.0050
1 L Bottom _I 1
3.0 Width=0.50 ft 3.0
LINER RESULTS Not to Scale
Matting Type Vegetation Characteristics
Reach Stability Analysis Permissible Calculated Safety Factor Remarks
Staple Pattern Phase Class Type Density Shear Stress Shear Stress
(psi) (psi)
Straight Unreinforced Vegetation D Bunch 50.75% 3.33 0.39 8.60 STABLE
Soil Sandy Loam 0.035 0.035 0.99 ' UNSTABLE
1111 North American Green ECMDS Version 4.3-Channel Protection Design,Output Form
File Specifications Options Help
ENGLISH. IUSER I 111 :123 03:55 PM I
HYDRAULIC RESULTS
Discharge Peak Flow Velocity(fps) Area(sq.ft) Hydraulic Normal S75(n=0.039)
(cfs) Period(hrs) Radius(ft) Depth(ft)
110.1 ` 0.2 1.98 5.10 0.62 1.22
S=0.0050
1 L Bottom J 1
3.0 Width=0.50 ft 3.0
LINER RESULTS Not to Scale
Matting Type Vegetation Characteristics .b
Reach Stability Analysis Permissible Calculated Safety Factor Remarks 4.1
Staple Pattern Phase Class Type Density Shear Stress Shear Stress
(psi) (psi) 4
Straight S75 Unvegetated 1.55 - 0.38 4.06 STABLE
Staple D

Ditch#13
o North American Green ECMDS Version 4.3-Channel Protection Design,Output Form
File Specifications Options Help
ENGLISH. (USER I 1/17/2023 03:56 PM I
HYDRAULIC RESULTS
Discharge Peak Flow Velocity(fps) Area(sq.ft) Hydraulic Normal Unreinforced Vegetation(n=0.040)
(cfs) .Period(hrs), , Radius(ft) Depth(ft)
19.0 0.2 2.43 3.71 0.53 1.03
S=0.0100
1 L Bottom _I 1
3.0 Width=0.50 ft 3.0
LINER RESULTS Not to Scale
Matting Type Vegetation Characteristics
Reach Stability Analysis Permissible Calculated Safety Factor Remarks
Staple Pattern ' Phase Class Type Density Shear Stress Shear Stress
(psi) (psi)
Straight Unreinforced Vegetation D Bunch.50-75%. 3.33 0.64 5.17 STABLE
•
Soil Sandy Loam 0.035 0.059 0.60 UNSTABLE
• II North American Green ECMDS Version 4.3-Channel Protection Design,Output Form
File Specifications Options Help
EENGLISH. (USER I 11/17/2023 03:57 PM I
HYDRAULIC RESULTS
Discharge Peak Flow Velocity(fps) Area(sq.ft) Hydraulic Normal S75(n=0.042)
(cis) Period(hrs) Radius(ft) , Depth(ft) I I
9.0 0.2 2.32 3.87 0.54 1.06
S=0.0100
1 L Bottom J 1
3.0 Width=0.50 ft 3.0
LINER RESULTS Not to Scale
Matting Type Vegetation Characteristics
Reach Stability Analysis Permissible Calculated Safety Factor Remarks
Staple Pattern ' Phase Class Type Density Shear Stress Shear Stress
(psi) (psi)
Straight S75 Unvegetated 1.55 0.66 2.35 STABLE
Staple D

Ditch#14
® North American Green ECMDS Version 4.3-Channel Protection Design,Output Form
File Specifications Options Help
IENGLISH. IUSER I 11/17/2023 11 .11
HYDRAULIC RESULTS
Discharge Peak Flow Velocity(fps) Area(sq.ft) Hydraulic Normal Unreinforced Vegetation(n=0.040)
(cfs) Period(hrs) Radius(ft) Depth(ft) I
11.8 0.1 1.25 1.44 0.33 0.61
S=0.0050
1 L Bottom _I 1
3.0 Width=0.50 ft 3.0
LINER RESULTS Not to Scale
Matting Type Vegetation Characteristics
Reach Stability Analysis Permissible Calculated Safety Factor Remarks
Staple Pattern Phase Class Type Density Shear Stress Shear Stress
(psi) (psi)
Straight Unreinforced Vegetation D Bunch 50-75% 3.33 0.19 17.37 STABLE
Soil Sandy Loam 0.035 0.017 2.00 STABLE

4D Site Solutions, Inc.
DITCH CALCULATIONS
NOTE:sheet only set up to handle Tc from 5 min to 30 min
A. Flow velocity<2.0 fps when discharging to wetlands B. Flow velocity<4.5 fps all other cases** C. Channel slope<5.0%for curb outlet swales
1916-BAYWOOD FOREST SUBDIVISION
Rainfall Intensity
Storm Event
5-min 10-min 15-min 30-min
10-yr 7.94 6.35 5.36 3.88
25-yr 8.92 7.10 6.00 4.45
50-yr 9.64 7.67 6.47 4.88
100-yr 10.30 8.21 6.92 5.30
Tc
Drainage Impervious Grassed Storm Rainfall
Ditch No. C Kerby Kirpich Intensity Q(cfs)
Area(ac) Area(ac) Area(ac) Event(yr)
Total Tc Tc Used (m/hr)
L(ft) n s Toy, L(ft) S Tch
1 0.20 0.06 0.14 0.50 n/a 200.0 0.004 3.86 3.86 5 10-yr 7.94 0.79
2 0.10 0.03 0.07 0.50 n/a 105.0 0.018 1.32 1.32 5 10-yr 7.94 0.40
3 0.07 0.02 0.05 0.50 n/a 115.0 0.020 1.36 1.36 5 10-yr 7.94 0.28
4 0.34 0.08 0.26 0.45 n/a 275.0 0.012 3.24 3.24 5 10-yr 7.94 1.21
5 0.73 0.17 0.56 0.45 n/a 410.0 0.011 4.55 4.55 5 10-yr 7.94 2.61
6 1.49 0.23 1.26 0.40 n/a 625.0 0.007 7.71 7.71 10 10-yr 6.35 3.78
7 1.21 0.19 1.02 0.40 n/a 375.0 0.016 3.68 3.68 5 10-yr 7.94 3.84
8 0.99 0.23 0.76 0.45 n/a 485.0 0.010 5.37 5.37 5 10-yr 7.94 3.54
9 1.26 0.29 0.97 0.45 n/a 525.0 0.010 5.71 5.71 5 10-yr 7.94 4.50
10 0.25 0.06 0.19 0.45 n/a 350.0 0.008 4.55 4.55 5 10-yr 7.94 0.89
11 0.33 0.08 0.25 0.45 n/a 375.0 0.013 3.98 3.98 5 10-yr 7.94 1.18
12 3.97 0.61 3.36 0.40 n/a 805.0 0.010 7.94 7.94 10 10-yr 6.35 10.08
13 3.56 0.55 3.01 0.40 n/a 720.0 0.009 7.58 7.58 10 10-yr 6.35 9.04
14 0.50 0.12 0.38 0.45 n/a 480.0 0.005 6.96 6.96 5 10-yr 7.94 1.79
printed:7/21/2023 11:36 AM Page 1 of 1

OUTLET PROTECTION DATE DESIGN PHASE
DESIGN 1-17-2023 PRELIM / /
PROJECT NAME PROJECT NO CONSTR / X /
BAYWOOD FOREST SUBDIVISION 1916 REVISION / /
LOCATION BY RECORD / /
Cumberland County, North Carolina BPB OTHER / /
CHECKED BY (SPECIFY)
CSB
Storm Outlet Structure
FES No.= PIPE 1 OUT Q1o/Qfull = 0.22
Pipe Dia= 18 in V/Vfull = 0.78
Q10= 1.73 cfs V= 3.5 fps
Qfull = 7.98 cfs
Vfull = 4.51 fps
From Fig. 8.06.b.1: Zone = 2
From Fig. 8.06.b.2: D50 = 8 in
DMAX = 12 in
11 :1
Riprap Class = B
Apron Thickness = 18 in
Apron Length 9.0 ft
• Apron Width @ Outlet = 4.5 ft
•� 000�•
Apron Width @ End = 10.5 ft
Length
Storm Outlet Structure
FES No.= PIPE 2 OUT Q1o/Qfull = 0.16
Pipe Dia= 18 in V/Vfull = 0.72
Q10= 1.20 cfs V= 3.1 fps
Qfull = 7.58 cfs
Vfull = 4.28 fps
From Fig. 8.06.b.1: Zone = 2
From Fig. 8.06.b.2: D50 = 8 in
DMAX = 12 in
Riprap Class = B
s Apron Thickness = 18 in
3 Apron Length 9.0 ft
Apron Width @ Outlet = 4.5 ft
Apron Width @ End = 10.5 ft
L Length
1916-Storm Drainage for Spread.xls LATEST REVISION:7/21/2023 11:36 AM PAGE 1 OF 2

OUTLET PROTECTION DATE DESIGN PHASE
DESIGN 1-17-2023 PRELIM / /
PROJECT NAME PROJECT NO CONSTR / X /
BAYWOOD FOREST SUBDIVISION 1916 REVISION / /
LOCATION BY RECORD / /
Cumberland County, North Carolina BPB OTHER / /
CHECKED BY (SPECIFY)
CSB
Storm Outlet Structure
FES No.= PIPE 3 OUT Q1o/Qfull = 1.03
Pipe Dia= 18 in V/Vfull = 1.14
Q10= 7.64 cfs V= 4.8 fps
Qfull = 7.43 cfs
Vfull = 4.20 fps
From Fig. 8.06.b.1: Zone = 2
From Fig. 8.06.b.2: D50 = 8 in
DMAX = 12 in
Riprap Class = B
4.4444444 s Apron Thickness = 18 in
3 Apron Length 9.0 ft
Apron Width @ Outlet = 4.5 ft
Apron Width @ End = 10.5 ft
Length
1916-Storm Drainage for Spread.xls LATEST REVISION:7/21/2023 11:36 AM PAGE 2 OF 2

Culvert Report
Hydraflow Express Extension for Autodesk®Civil 3D®by Autodesk, Inc. Tuesday,Jan 17 2023
PIPE 1
Invert Elev Dn (ft) = 129.25 Calculations
Pipe Length (ft) = 52.00 Qmin (cfs) = 1.73
Slope (%) = 0.58 Qmax (cfs) = 1.73
Invert Elev Up (ft) = 129.55 Tailwater Elev (ft) = (dc+D)/2
Rise (in) = 18.0
Shape = Circular Highlighted
Span (in) = 18.0 Qtotal (cfs) = 1.73
No. Barrels = 1 Qpipe (cfs) = 1.73
n-Value = 0.012 Qovertop (cfs) = 0.00
Culvert Type = Circular Concrete Veloc Dn (ft/s) = 1.39
Culvert Entrance = Square edge w/headwall (C) Veloc Up (ft/s) = 3.41
Coeff. K,M,c,Y,k = 0.0098, 2, 0.0398, 0.67, 0.5 HGL Dn (ft) = 130.25
HGL Up (ft) = 130.04
Embankment Hw Elev (ft) = 130.23
Top Elevation (ft) = 132.40 Hw/D (ft) = 0.45
Top Width (ft) = 27.00 Flow Regime = Inlet Control
Crest Width (ft) = 5.00
Flex(R) PIPE 1 fkv Depth(1)
133.00 3.45
/ 41111ii6s
132.00 - 145131.00
40tlfaWtl
13D DD 045
12000 -0.55
120.00 -1.55
0 5 10 15 20 25 30 35 aU 45 50 55 50 65 70 75
GircularC0lveH HGL Embank
Ras.(a)

Culvert Report
Hydraflow Express Extension for Autodesk®Civil 3D®by Autodesk, Inc. Tuesday,Jan 17 2023
PIPE 2
Invert Elev Dn (ft) = 129.45 Calculations
Pipe Length (ft) = 48.00 Qmin (cfs) = 1.20
Slope (%) = 0.52 Qmax (cfs) = 1.20
Invert Elev Up (ft) = 129.70 Tailwater Elev (ft) = (dc+D)/2
Rise (in) = 18.0
Shape = Circular Highlighted
Span (in) = 18.0 Qtotal (cfs) = 1.20
No. Barrels = 1 Qpipe (cfs) = 1.20
n-Value = 0.012 Qovertop (cfs) = 0.00
Culvert Type = Circular Concrete Veloc Dn (ft/s) = 1.01
Culvert Entrance = Square edge w/headwall (C) Veloc Up (ft/s) = 3.07
Coeff. K,M,c,Y,k = 0.0098, 2, 0.0398, 0.67, 0.5 HGL Dn (ft) = 130.40
HGL Up (ft) = 130.11
Embankment Hw Elev (ft) = 130.26
Top Elevation (ft) = 132.50 Hw/D (ft) = 0.37
Top Width (ft) = 27.00 Flow Regime = Inlet Control
Crest Width (ft) = 5.00
Eger 01) PIPE 2 nx Germ 01)
133.00 3.30
132.00 - 2.30
131.00 1.30
- II r Iniatclmra
130.00 0.30
1z3.00 - - -0.70
II5.00 -1.70
0 5 10 15 20 25 30 35 30 /5 50 55 60 55 70
Gircula,CuIve, HGL Embank
Res.01)

Culvert Report
Hydraflow Express Extension for Autodesk®Civil 3D®by Autodesk, Inc. Tuesday,Jan 17 2023
PIPE 3
Invert Elev Dn (ft) = 127.80 Calculations
Pipe Length (ft) = 40.00 Qmin (cfs) = 7.64
Slope (%) = 0.50 Qmax (cfs) = 7.64
Invert Elev Up (ft) = 128.00 Tailwater Elev (ft) = (dc+D)/2
Rise (in) = 18.0
Shape = Circular Highlighted
Span (in) = 18.0 Qtotal (cfs) = 7.64
No. Barrels = 1 Qpipe (cfs) = 7.64
n-Value = 0.012 Qovertop (cfs) = 0.00
Culvert Type = Circular Concrete Veloc Dn (ft/s) = 4.74
Culvert Entrance = Square edge w/headwall (C) Veloc Up (ft/s) = 5.67
Coeff. K,M,c,Y,k = 0.0098, 2, 0.0398, 0.67, 0.5 HGL Dn (ft) = 129.08
HGL Up (ft) = 129.07
Embankment Hw Elev (ft) = 129.75
Top Elevation (ft) = 130.60 Hw/D (ft) = 1.17
Top Width (ft) = 20.00 Flow Regime = Inlet Control
Crest Width (ft) = 5.00
Flex(R) PIPE 3 Mr Dept,(0)
Ii
.
I
-
Inlelcontrol
129.00 1.00
12B00 0.00
r
121.00 -1.00
12fi.00 -2.00
0 5 10 15 20 25 30 35 N 45 55
Graa,Cdve,t HGL Embank
Res.(n)

4D Site Solutions, Inc.
PIPE CALCULATIONS
NOTE:sheet only set up to handle Tc from 5 min to 30 min
A. Cross-pipes to use 25-yr storm inensity
1916-BAYWOOD FOREST SUBDIVISION
1 Rainfall Intensity
Storm Event 5-mi
IO-yr 7.94 6.35 5.36 3.88
25-yr 8.92 7.1 6 4.45
50-yr 9.64 7.67 6.47 4.88
100-yr 10.3 8.21 6.92 5.3
Tc
Drainage Storm Rainfall
Pipe No. C Kerby Kirpich Intensity Q(cfs)
Area(ac) Event(yr)
Total Tc Tc Used (in/hr)
L(ft) n s Toy, L(ft) S Tch
1 0.43 0.45 n/a 275.0 0.012 3.24 3.24 5 25-yr 8.92 1.73
2 0.30 0.45 n/a 200.0 0.004 3.86 3.86 5 25-yr 8.92 1.20
3 2.69 0.40 n/a 625.0 0.007 7.71 7.71 10 25-yr 7.1 7.64
printed:7/21/2023 11:36 AM Page 1 of 1