SW3200801_2019-08-14-EC-Drain-Calc-Furr_20200911

DRAINAGE & EROSION CONTROL CALCULATIONS
for
FURR COMERCIAL BUILDING
CABARRUS COUNTY, NORTH CAROLINA
Revised August 14, 2020
Prepared for:
Tim Furr
5615 Shoreview Drive
Concord, NC 28205
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ZAviv
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Bluestone Land Management, PLLC
P-1444
Office: [phone]
Cell: [phone]
Physical Address: Mailing Address:
47o North Broad Street, Suite A 115 Autumn Frost Avenue
Mooresville, NC 28115 Statesville, NC 28677

NARRATIVE
Furr Commercial Building is 3 proposed commercial buildings in Cabarrus County. The
work will include clearing, stripping, erosion & sediment control, grading, and paving.
Bluestone Land Management, PLLC

PRECIPITATION DATA
Bluestone Land Management, PLLC

NOAA Atlas 14, Volume 2, Version 3
Location name: Mount Pleasant, North Carolina,
USA"
Latitude: 35.4117°, Longitude:-80.4308'
Elevation: 704.72 ft"
'source: ESRI Maps
source: USGS
POINT PRECIPITATION FREQUENCY ESTIMATES
G M. Bonnin D Martin, B. Lin, T Parzybok, M Yekla, and D. Riley
NOAA, National Weather Service, Silver Spring, Maryland
PF tabular I PF graphical I Maps & aerials
PF tabular
PDS-based point precipitation frequency estimates with 90% confidence intervals (in inches/hourll
Average recurrence interval (years)
�rationll f-lf�f�f 10 f 2s so 100 if 200 1f soo f 1000
5-minjjj
5.69
6.61
7.26
8.00
8.48 8.93 9.30
9.70
9.97
(5.24-6.19)
(6.08-7.20)
(6,66-7,88)
(7.31-8.66)
(770-919) (8,08-9.67) (8.38-10.1)
(8.66-10.5)
(8.83-10.8)
10-mtn4.54
5.30
5.81
6.37
6.76 7.09 7.37
7.67
7.85(4.19-4.95)
(4.87-5.77)
(5,33-6,31)
(5.82-6.90)
(6.14-7.32) (6.41-7.68) (6.64-7.99)
(6.85-8.33)
(6.95-8.52)
15-minE((2.03-2.38)
20
3.81
4.90
5.39
5.70
5.98
6.20
6.44
6.57
-348)
!2�20
(3,51-4.15)
6)
(4,50-5,32)
(492-5.83)
(5.18-6.18)
(5.40-647)
(558-672)
(5.75-6.99)
(5.82-7.13)
30-min
2.63
Ell
3.55
3.99
4.30
4.58
4.83
5.12
5.32
(2,43-2,87)
5)
(3.26-3.85)
(3.64-4.32)
(3.90-4.65)
(4,14-4.96)
(4,35-5,23)
(4.58-5.56)
(4.71-5.77)
60-min
1.37
1.65
2.04
2.31
2.66
2.91
3.15
3.38
3.67
3.88
(1.26-149)
(L52-1.80)
(1.87-2.21)
(212-2.51)
(242-2.88)
(2.64-3.15)
(2.85-341)
(3.05-367 )
(3.28-3.99)
(3.44-422)
2-hr
0.792
0.959
1.19
1.36
1.58
1.75
1.91
2.07
2.28
2.43
(0.725-0.866)
(0.876-1 05)
(1 09-1 30)
(1.24-1 49)
(1 44-1.73)
(1.58-1.91 )
(1.72-2.09)
1 (1.84-2 26)
1 (2.00-2.48)
(2.12-2.66)
3-hr 0.564 11 0.680 10.8491 0.977 11 1.15 11 1.28 11 1.41 11.55 1.73 1.87
(0.516-0.616) (0624-0745) (0.777-0.929) (0890-1.07) 1 L (104-125) 1 (1.16-1.39) 1 (127-1.53) (1.38-168) (152-1.88) (1.62-2.03)
6-hr 0.343 0.413 0.515 0.595 0.702 0.786 0.871 0.957 1.08 1.17
(0.314-0.376) (0.378.0 4531 (0.470-0.563) 0.542-0.649) 10 635-0.764 (0 706-0.855) (0.777-0.948) (0.847-1 041 (0.940-1.17) 11.01-1 271
12-hr
0.202
(0.186-0.220)
0.121
(0.112-0.130)
0.244
(0.224-0.267)
0.146
(0,135-0.158)
0.307
(0281-0.335)
0.183
(0.169-0.198)
0.356
0.325-0.389)
0.212
0.196-0.229)
0.423
(0.383-0.460
0.252
(0232-0272)
0.477
(0.428-0.517)
0.283
(0.261-0.306)
0.532 0.590
(0.474-0.576) (0.526-0.637)
0.315 0.349
(0.289-0.341) (0.319-0.377)
0.670
(0.581-0.722)
0.394
0.359-0.427)
0.734
(0.627-0392)
0.430
(0.391-0.467)
24-hr
2-day 0.071 0.085 0.106 ) 0.123 0.145 0.163 0.181 0.199 0.225 0.245 �
(0.065-0 076) (0.079-0.092) (0.098-0.114 (0.113-0.132) (0.134-0 156) (0,150-0.175) (0.166-0.195) (0.183-0.215) (0.205-0.243) (0.223-0.265
3-day 0.050 0.060 0.075 0.086 0.101 0.114 0.126 0.139 0.157 0.171 N
(0.046-0.054) ItO056.0.065) (0.069-0.080) 0.080-0.092) (0.094-0109) (0.105-0.122) 0.116-0.136) (0.127-0150) 0.143-0.169 (0.155-0.184
4-day 0.040 0.048 0.059 0.068 0.080 0.089 0.099 6.169 0.123 0.134
(
0037.0043) k (0.044-0.051) (0055-0063) 0.063-0.072) (0.073.0085) (0.082-0.096) (0,091-0.106) (0.100-0.117) (0.112-0.132) (0.122-0144)
7-day ( 0.026 0.031 0.038 0.043 0.051 0.057 0.063 0.069 0.077 0.084
0 024.0 028) 10.029-0.033) (0.035-0.040) 0.040-0.046) (0 047-0.054 (0.053-0 060) (0.058-0 067) (0,064-0.073) (0.071-0.083) (0.077-0.090)
10-day 0.021 0.025 0.030 0.034 0.039 0.043 0.047 0.052 0.058 0.062
(0,020-0,022) (0.023-0.026) (0028-0032) 0.032-0.036) (0.037-0.042) (0.040-0.046) (0.044-0.051) (0.048-0.055) (0.053-0.061) (0.057-0.066)
20-day 0.014 0.017 0.020 0.022 0.028 0.030 0.033 0.036 0.039
(0.013-0.015) (0 016-0 017) (0.018-0.021) 0.021-0.023) F��Q(0,026-0 029) (0.028-0.032) (0.030-0 034) (0 034-0 038) (0 036-0 041
f30-day 0.011 0.014 0.016 0.017 0.020 0.021 0.023 0.025 0.027 0.029
� (0.011-0,012) (0 013-0 014) (0 015-0 017) (0.016-0.018) (0.019-0.021 (0.020-0.022) (0.022-0.024) (0.023.0.026) (0 025-0,029) (0.027-0.030)
45-day 0.010 0.011 0.013 0.014 0.016 0.017 0.018 0.019 0.021 0.022
(0.009-0.010) (0.011-0.012) (0 012-0 013) 0.013-0.015) (0.015.0.016)(0.016-0.018) (0 017-0.019) (0.018-0.020) (0 020-0.022) (0.021-0.023)
60-day 0.009 0.010 0.011 0.012 0.014 0.015 0.016 0.017 0.018 0.019
(0 008-0.009) (0.010-0 011) (0 011-0 012) (0.012-0 013) (0.013.0.014 (0.014-0.015) (0 015-0.016) (0.016-0,017) (0.017-0.019) (0.018-0.020
Precipitation frequency (PF) estimates in this table are based on frequency analysis of partial duration series (PDS).
Numbers in parenthesis are PF estimates at lower and upper bounds of the 90% confidence interval. The probability that precipitation frequency estimates (for
given duration and average recurrence interval) will be greater than the upper bound (or less than the lower bound) is 5%. Estimates at upper bounds are not
khecked against probable maximum precipitation (PMP) estimates and may be higher than currently valid PMP values-
lPlease refer to NOAAAtlas 14 document for more information.
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SKIMMER BASIN
Bluestone Land Management, PLLC

Selection of Sediment Control Measure SK-1
3.07 Total Drainage Area User entry
Do Not Use Temporary Sediment Trap Calculated Value
Okay Skimmer Sediment Basin
Okay Temporary Sediment Basin
1.90 Disturbed Area (Acres)
8.91528 Peak Flow from 10-year Storm (cfs) = CIA = 0.40 7.26 3.07
5 MIN TC
Updated to comply with NPDES Permit Conditions
TGH and BRB 07/03/2012

Skimmer Basin sK-1
Okay
1.90 Disturbed Area (Acres)
8.91528 Peak Flow from 10-year Storm (cfs)
3420 Required Volume ft3
2897 Required Surface Area ft2
38.1 Suggested Width ft
76.1 Suggested Length ft
42 Trial Top Width at Spillway Invert ft
84 Trial Top Length at Spillway Invert ft
2 Trial Side Slope Ratio Z:1
2 Trial Depth ft (2 to 3.5 feet above grade)
34 Bottom Width ft
76 Bottom Length ft
2584 Bottom Area ft2
6091 Actual Volume ft3 Okay
3528 Actual Surface Area ft2 Okay
5 Trial Weir Length ft
1 Trial Depth of Flow ft
15.0 Spillway Capacity cfs Okay
1.5 Skimmer Size (inches)
0.125 Head on Skimmer (feet)
1.25 Orifice Size (1/4 inch increments)
2.68 Dewatering Time (days)
Suggest about 3 days
Skimmer Size
(Inches)
1.5
2
2.5
3
4
5
6
8

Selection of Sediment Control Measure SK-2
3.10 Total Drainage Area User entry
Do Not Use Temporary Sediment Trap Calculated Value
Okay Skimmer Sediment Basin
Okay Temporary Sediment Basin
1.70 Disturbed Area (Acres)
9.0024 Peak Flow from 10-year Storm (cfs) = CIA = 0.40 7.26 3.1
5 MIN TC
Updated to comply with NPDES Permit Conditions
TGH and BRB 07/03/2012

Skimmer Basin sK-2
Okay
1.70 Disturbed Area (Acres)
9.0024 Peak Flow from 10-year Storm (cfs)
3060 Required Volume ft3
2926 Required Surface Area ft2
38.2 Suggested Width ft
76.5 Suggested Length ft
42 Trial Top Width at Spillway Invert ft
84 Trial Top Length at Spillway Invert ft
2 Trial Side Slope Ratio Z:1
2 Trial Depth ft (2 to 3.5 feet above grade)
34 Bottom Width ft
76 Bottom Length ft
2584 Bottom Area ft2
6091 Actual Volume ft3 Okay
3528 Actual Surface Area ft2 Okay
5 Trial Weir Length ft
1 Trial Depth of Flow ft
15.0 Spillway Capacity cfs Okay
2 Skimmer Size (inches)
0.167 Head on Skimmer (feet)
1 Orifice Size (1/4 inch increments)
3.24 Dewatering Time (days)
Suggest about 3 days
Skimmer Size
(Inches)
1.5
2
2.5
3
4
5
6
8

PERMANENT DITCHES
Bluestone Land Management, PLLC

8/14/2020
NORTH
AMERICAN
GREEN
CHANNEL ANALYSIS
> > > PD-1 - 10yr
Name
PD-1 - 10yr
Discharge
6.58
Channel Slope
0.035
Channel Bottom Width
0
Left Side Slope
3
Right Side Slope
3
Low Flow Liner
Retardence Class
C 6-12 in
Vegetation Type
Mix (Sod and Bunch)
Vegetation Density
Good 65-79%
Soil Type
Clay Loam (CL)
Unreinforced Vegetation
North American Green
5401 St. Wendel -Cynthiana Rd.
Poseyville, Indiana 47633
Tel. [phone]
> Fax [phone]
www.nagreen.com
ECMDS v7.0
Normal Permissible Calculated Safety Staple
Phase Reach Discharge Velocity Mannings N Remarks
Depth Shear Stress Shear Stress Factor Pattern
Jnreinforced Straight 6.58 cfs 3.06 ft/s 0.85 ft 0.049 4 Ibs/ft2 1.85 Ibs/ft2 2.16 STABLE
Vegetation
Underlying Straight 6.58 cfs 3.06 ft/s 0.85 ft 0.049 4 Ibs/ft2 0.88 Ibs/ft2 4.56 STABLE
Substrate
https://ecmds.com/project/l 45149/channel-analysis/187927/show 1 /1

8/14/2020
NORTH
AMERICAN
GREEN
CHANNEL ANALYSIS
>> > PD-2 - 10yr
Name
PD-2 - 10yr
Discharge
2.57
Channel Slope
0.045
Channel Bottom Width
0
Left Side Slope
3
Right Side Slope
3
Low Flow Liner
Retardence Class
C 6-12 in
Vegetation Type
Mix (Sod and Bunch)
Vegetation Density
Good 65-79%
Soil Type
Clay Loam (CL)
Unreinforced Vegetation
North American Green
5401 St. Wendel -Cynthiana Rd.
Poseyville, Indiana 47633
Tel. [phone]
> Fax [phone]
www.nagreen.com
ECMDS v7.0
Normal Permissible Calculated Safety Staple
Phase Reach Discharge Velocity Mannings N Remarks
Depth Shear Stress Shear Stress Factor Pattern
Jnreinforced Straight 2.57 cfs 2.56 ft/s 0.58 ft 0.052 4 Ibs/ft2 1.62 Ibs/ft2 2.46 STABLE
Vegetation
Underlying Straight 2.57 cfs 2.56 ft/s 0.58 ft 0.052 4 Ibs/ft2 0.77 Ibs/ft2 5.19 STABLE
Substrate
https://ecmds.com/project/l 45149/channel-analysis/187928/show 1 /1

8/14/2020
NORTH
AMERICAN
GREEN
CHANNEL ANALYSIS
>> > PD-3 - 10yr
Name
PD-3 - 10yr
Discharge
1.22
Channel Slope
0.01
Channel Bottom Width
0
Left Side Slope
3
Right Side Slope
3
Low Flow Liner
Retardence Class
C 6-12 in
Vegetation Type
Mix (Sod and Bunch)
Vegetation Density
Good 65-79%
Soil Type
Clay Loam (CL)
Unreinforced Vegetation
North American Green
5401 St. Wendel -Cynthiana Rd.
Poseyville, Indiana 47633
Tel. [phone]
> Fax [phone]
www.nagreen.com
ECMDS v7.0
Normal Permissible Calculated Safety Staple
Phase Reach Discharge Velocity Mannings N Remarks
Depth Shear Stress Shear Stress Factor Pattern
Jnreinforced Straight 1.22 cfs 0.82 ft/s 0.71 ft 0.088 4 Ibs/ft2 0.44 Ibs/ft2 9.09 STABLE
Vegetation
Underlying Straight 1.22 cfs 0.82 ft/s 0.71 ft 0.088 4 Ibs/ft2 0.21 Ibs/ft2 19.16 STABLE
Substrate
https://ecmds.com/project/l 45149/channel-analysis/187929/show 1 /1

8/14/2020
NORTH
AMERICAN
GREEN
CHANNEL ANALYSIS
> > > PD-4 - 10yr
Name
PD-4 - 10yr
Discharge
12.94
Channel Slope
0.02
Channel Bottom Width
0
Left Side Slope
3
Right Side Slope
3
Low Flow Liner
Retardence Class
C 6-12 in
Vegetation Type
Mix (Sod and Bunch)
Vegetation Density
Good 65-79%
Soil Type
Clay Loam (CL)
Unreinforced Vegetation
North American Green
5401 St. Wendel -Cynthiana Rd.
Poseyville, Indiana 47633
Tel. [phone]
> Fax [phone]
www.nagreen.com
ECMDS v7.0
Normal Permissible Calculated Safety Staple
Phase Reach Discharge Velocity Mannings N Remarks
Depth Shear Stress Shear Stress Factor Pattern
Jnreinforced Straight 12.94 cfs 2.79 ft/s 1.24 ft 0.053 4 Ibs/ft2 1.55 Ibs/ft2 2.58 STABLE
Vegetation
Underlying Straight 12.94 cfs 2.79 ft/s 1.24 ft 0.053 4 Ibs/ft2 0.74 Ibs/ft2 5.43 STABLE
Substrate
https://ecmds.com/project/l 45149/channel-analysis/187930/show 1 /1

DRAINAGE CALCULATIONS
Bluestone Land Management, PLLC

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RIP RAP APRONS
Bluestone Land Management, PLLC

RIP RAP APRON
Project Name:
Furr Building
Project Number:
2019-0020
APRON:
A-1
PE-1
DISCHARGE
=
8.65
CFS
PIPE DIAMETER =
18
inches
d50 =
6
inches
Figure 8.06a NCDENR Design manual
LENGTH =
8
feet
Figure 8.06a NCDENR Design manual
WIDTH =
10
feet
dMAX
= d50 * 1.5
9
inches
THICKNESS
= dMAX * 1.5
13.5
inches
APRON:
A-2
PE-3
DISCHARGE
=
1.18
CFS
PIPE DIAMETER =
15
inches
d50 =
6
inches
Figure 8.06a NCDENR Design manual
LENGTH =
8
feet
Figure 8.06a NCDENR Design manual
WIDTH =
9
feet
dMAX
= d50 * 1.5
9
inches
THICKNESS
= dMAX * 1.5
13.5
inches
1 of 1

3
Outlet W = Do + La
pipe
diameter (Do) l
T ilwater < 0.5Do
GEMEREMMMMOSM
tn
l�aNV
n
50
J.
-tit
Appendices
3
a)
N 2
Cn
a
(0
a
Q
O
1 'O
3 5 10 20 50 100 200 500 1000
Discharge (0/sec)
Curves may not be extrapolated.
Figure 8.06a Design of outlet protection protection from a round pipe flowing full, minimum tailwater condition (Tw < 0.5 diameter).
Rev. 12/93 8.06.3

MAPS
(see construction plans)
Bluestone Land Management, PLLC