SW4200601_12052-Southwick Solar LLC-Calc Book_20200702

SOUTHWICK SOLAR, LLC
CDC Project No.: 12052
Mailing Address: P.O. Box 5432, Asheville, NC 28813
168 Patton Avenue Asheville, NC 28801 52 Walnut Street – Suite 9, Waynesville, NC 28786
Phone [phone] Fax [phone] Phone: [phone] Fax: [phone]

TABLE OF CONTENTS

1. Erosion Control and Stormwater Narrative
2. Impervious Calculations
3. Drainage Area Maps
 EC Drainage

4. Erosion Control Calculations
 Sediment Basin
 Temporary Ditch
5. Culvert Calculations
 Driveway Culvert
6. Rip-Rap Apron Calculations
7. NRCS Soil Report
8. Figures
 USGS Topo Map
 FEMA FIRMette Map
 NOAA Precipitation Tables

Mailing Address: P.O. Box 5432, Asheville, NC 28813
168 Patton Avenue, Asheville, NC 28801 52 Walnut Street – Suite 9, Waynesville, NC 28786
Phone [phone] Fax [phone] Phone: [phone] Fax: [phone]

EROSION CONTROL AND STORMWATER NARRATIVE

General

The property located at 3058 Boy Wood Rd in Alamance County, NC is comprised of two (2)
adjacent parcels (8892-12-0463 & 8892-12-1987) which combined have an area of 42.5 acres.

The property is situated between the Haw River (East) and Boy Wood Rd (West). A portion of
the property on which the project will take place lies in the FEMA 100-yr floodplain, however,
none of the project area will lie in the floodplain. Existing features on the property consist
primarily of agricultural fields and wooded areas. Other features include fences, overhead utility
lines, and a natural draw in the topography which develops into a small stream as it goes east
where it flows into the Haw River. The predevelopment impervious area total is 0%.

The proposed solar farm, Southwick Solar, LLC, will consist of solar arrays, inverter pads, utility
line, a 30’ landscape buffer, and a new gravel access road with driveway culvert, connecting to
Boy Wood Rd. Ground cover conditions after construction will consist of grassy fields, some
wooded areas and landscaped buffer areas. The post-development impervious area total is
approximately 2.8%

Erosion Control

The proposed erosion control devices consist of a construction entrance, silt fences, temporary
ditches with check dams, and two sediment basins. The project area will cover approximately
38.16 acres.

Impervious Calculations:
SOUTHWICK SOLAR, LLC
CDC Project No.: 12052
Pre-Development Post Development
(SF) (SF)
Grass, Woods 1,057,012 1,027,784
Total Pervious: 1,057,012 1,027,784
Gravel 0 29,025
Concrete 0 203
Total Impervious: 0 29,228
% Impervious: 0.0% 2.8%
Total Area:1,057,012 1,057,012
ONSITE PROPERTY
Area Type
IMPERVIOUS CALCULATIONS
Issued 6/11/2020

Drainage Area Maps:

Erosion Control Calculations:

Clovelly Solar Farm
CDC Project No.: 12049
A B Units
Skimmer Basin
10 100 acre NCDENR E&SC Manual (Ch 6.6)
2.31 21.63 acre
2.31 * acre
0.6 *Weighted Coefficient
7.13 * in/hr at TC
120 325 feet
30 130 feet
4.0:1 2.5:1 feet 2:1 Min, 6:1 Max
2.00 2.00 feet 2' min for Skimmer & Basin
2.00 2.00 X:1
112 317 feet = Lt - 2 (Slope x Depth)
22 122 feet = Wt - 2 (Slope x Depth)
9.88 89.38 cfs = DA x C x I
4,158 33,444 cu-ft
6,064 80,924 cu-ft
3,212 38,880 sq-ft
3,600 42,250 sq-ft
3 3 days In NC assume 3 days
4.0 4.0 inch Faircloth Skimmer Chart
6.0 6.0 inch Faircloth Orifice Factors

Does the basin have a spillway?Yes
20x1.5' 20x1.5' feet
0.50 0.50 feet
1.00 1.00 feet
Notes:
1. Spillway dimensions are based on Table 6.60a "Design of Spillways" from the NC Erosion & Sediment Control Planning & Design
Manual
2. Rainfall Intensity, I, is obtained from Appendix 8.03.07 from the NC Erosion & Sediment Control Planning & Design Manual
3. Skimmer Design is based off of the Faircloth Skimmer Packet
4. Drawdown time is per NCDENR requirements
Skimmer Size
Orifice Diameter
SPILLWAY SIZE
Spillway Dimensions
Water Depth
Free-Board
*SCS METHOD USED FOR DRAINAGE AREAS OVER 10 ACRES. SEE CALCULATIONS.
Drawdown Time
Water Depth
Side Slope Ratio
Bottom of Basin Length
Bottom of Basin Width
SURFACE AREA & VOLUME
Runoff (10 Year Event)
Minimum Volume
Volume Provided
Minimum Surface Area
Surface Area Provided
SKIMMER SIZE
L/W Ratio
TEMPORARY SEDIMENT BASIN SCHEDULE
BASIN INFORMATION
Trap/Basin ID
Basin Type
Maximum Drainage Area
Drainage Area (DA)
Disturbed Area
Runoff Coefficient (C)
Rainfall Intensity (I10)
Top of Water Length
Top of Water Width
Issued 6/12/2020
2S
During Construction
3P
Temporary Sediment
Basin
Routing Diagram for Southwick Sed Basin Calc
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Subcat Reach Pond Link
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Southwick Sed Basin Calc
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Area Listing (all nodes)
Area
(sq-ft)
CN Description
(subcatchment-numbers)
132,858 65 2 acre lots, 12% imp, HSG B (2S)
809,345 86 Fallow, bare soil, HSG B (2S)
942,203 83 TOTAL AREA
SOUTHWICK SOLAR, LLC
Southwick Sed Basin Calc
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Soil Listing (all nodes)
Area
(sq-ft)
Soil
Group
Subcatchment
Numbers
0 HSG A
942,203 HSG B 2S
0 HSG C
0 HSG D
0 Other
942,203 TOTAL AREA
SOUTHWICK SOLAR, LLC
Southwick Sed Basin Calc
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Ground Covers (all nodes)
HSG-A
(sq-ft)
HSG-B
(sq-ft)
HSG-C
(sq-ft)
HSG-D
(sq-ft)
Other
(sq-ft)
Total
(sq-ft)
Ground
Cover
Subcatch
Numbers
0 132,858000132,858 2 acre lots, 12%
imp
0 809,345000809,345 Fallow, bare soil
0 942,203 0 0 0 942,203 TOTAL AREA
SOUTHWICK SOLAR, LLC
Southwick Sed Basin Calc
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Pipe Listing (all nodes)
Line# Node
Number
In-Invert
(feet)
Out-Invert
(feet)
Length
(feet)
Slope
(ft/ft)
n Diam/Width
(inches)
Height
(inches)
Inside-Fill
(inches)
1 3P 0.00 -1.00 100.0 0.0100 0.011 18.0 0.0 0.0
SOUTHWICK SOLAR, LLC
Type II 24-hr 10yr Rainfall=4.97"Southwick Sed Basin Calc
Printed 6/12/2020Prepared by {enter your company name here}
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Time span=0.00-24.00 hrs, dt=0.05 hrs, 481 points
Runoff by SCS TR-20 method, UH=SCS, Weighted-CN
Reach routing by Stor-Ind+Trans method - Pond routing by Stor-Ind method
Runoff Area=21.630 ac 1.69% Impervious Runoff Depth>3.14"Subcatchment 2S: During Construction
Flow Length=1,071' Tc=14.1 min CN=83 Runoff=89.38 cfs 246,337 cf
Peak Elev=2.95' Storage=132,847 cf Inflow=89.38 cfs 246,337 cfPond 3P: Temporary Sediment Basin
Primary=9.97 cfs 154,883 cf Secondary=0.00 cfs 0 cf Outflow=9.97 cfs 154,883 cf
Total Runoff Area = 942,203 sf Runoff Volume = 246,337 cf Average Runoff Depth = 3.14"
98.31% Pervious = 926,260 sf 1.69% Impervious = 15,943 sf
SOUTHWICK SOLAR, LLC
Type II 24-hr 10yr Rainfall=4.97"Southwick Sed Basin Calc
Printed 6/12/2020Prepared by {enter your company name here}
Page 7HydroCAD® 10.00-12 s/n 04679 © 2014 HydroCAD Software Solutions LLC
Summary for Subcatchment 2S: During Construction
Runoff = 89.38 cfs @ 12.06 hrs, Volume= 246,337 cf, Depth> 3.14"
Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-24.00 hrs, dt= 0.05 hrs
Type II 24-hr 10yr Rainfall=4.97"
Area (ac) CN Description
3.050 65 2 acre lots, 12% imp, HSG B
18.580 86 Fallow, bare soil, HSG B
21.630 83 Weighted Average
21.264 98.31% Pervious Area
0.366 1.69% Impervious Area
Tc Length Slope Velocity Capacity Description
(min) (feet) (ft/ft) (ft/sec) (cfs)
10.9 100 0.0350 0.15 Sheet Flow, Sheet Flow
Grass: Dense n= 0.240 P2= 3.50"
1.2 186 0.0671 2.59 Shallow Concentrated Flow, Sheet To Ditch
Nearly Bare & Untilled Kv= 10.0 fps
2.0 785 0.0271 6.48 12.95 Channel Flow,
Area= 2.0 sf Perim= 4.5' r= 0.44' n= 0.022
14.1 1,071 Total
Subcatchment 2S: During Construction
Runoff
Hydrograph
Time (hours)
2423222120191817161514131211109876543210Flow (cfs)100
95
90
85
80
75
70
65
60
55
50
45
40
35
30
25
20
15
10
5
0
Type II 24-hr
10yr Rainfall=4.97"
Runoff Area=21.630 ac
Runoff Volume=246,337 cf
Runoff Depth>3.14"
Flow Length=1,071'
Tc=14.1 min
CN=83
89.38 cfs
SOUTHWICK SOLAR, LLC
Type II 24-hr 10yr Rainfall=4.97"Southwick Sed Basin Calc
Printed 6/12/2020Prepared by {enter your company name here}
Page 8HydroCAD® 10.00-12 s/n 04679 © 2014 HydroCAD Software Solutions LLC
Hydrograph for Subcatchment 2S: During Construction
Time
(hours)
Precip.
(inches)
Excess
(inches)
Runoff
(cfs)
0.00 0.00 0.00 0.00
0.25 0.01 0.00 0.00
0.50 0.03 0.00 0.00
0.75 0.04 0.00 0.00
1.00 0.05 0.00 0.00
1.25 0.07 0.00 0.00
1.50 0.08 0.00 0.00
1.75 0.09 0.00 0.00
2.00 0.11 0.00 0.00
2.25 0.12 0.00 0.00
2.50 0.14 0.00 0.00
2.75 0.16 0.00 0.00
3.00 0.17 0.00 0.00
3.25 0.19 0.00 0.00
3.50 0.20 0.00 0.00
3.75 0.22 0.00 0.00
4.00 0.24 0.00 0.00
4.25 0.26 0.00 0.00
4.50 0.27 0.00 0.00
4.75 0.29 0.00 0.00
5.00 0.31 0.00 0.00
5.25 0.33 0.00 0.00
5.50 0.35 0.00 0.00
5.75 0.38 0.00 0.00
6.00 0.40 0.00 0.00
6.25 0.42 0.00 0.00
6.50 0.44 0.00 0.03
6.75 0.47 0.00 0.07
7.00 0.49 0.00 0.12
7.25 0.52 0.01 0.17
7.50 0.54 0.01 0.22
7.75 0.57 0.01 0.28
8.00 0.60 0.02 0.33
8.25 0.63 0.02 0.40
8.50 0.66 0.03 0.50
8.75 0.69 0.03 0.61
9.00 0.73 0.04 0.75
9.25 0.77 0.05 0.88
9.50 0.81 0.07 0.97
9.75 0.85 0.08 1.08
10.00 0.90 0.09 1.30
10.25 0.95 0.11 1.57
10.50 1.01 0.14 1.93
10.75 1.08 0.17 2.38
11.00 1.17 0.20 3.02
11.25 1.27 0.26 3.94
11.50 1.41 0.33 5.51
11.75 1.92 0.64 16.34
12.00 3.30 1.69 78.69
12.25 3.51 1.87 35.48
12.50 3.65 1.99 13.81
12.75 3.75 2.07 8.33
Time
(hours)
Precip.
(inches)
Excess
(inches)
Runoff
(cfs)
13.00 3.84 2.15 6.74
13.25 3.91 2.21 5.67
13.50 3.97 2.26 4.98
13.75 4.03 2.31 4.38
14.00 4.08 2.35 3.90
14.25 4.12 2.39 3.51
14.50 4.16 2.43 3.32
14.75 4.20 2.46 3.16
15.00 4.24 2.50 3.00
15.25 4.28 2.53 2.84
15.50 4.31 2.56 2.67
15.75 4.34 2.59 2.51
16.00 4.37 2.61 2.35
16.25 4.40 2.64 2.21
16.50 4.43 2.66 2.14
16.75 4.46 2.69 2.08
17.00 4.48 2.71 2.02
17.25 4.51 2.73 1.97
17.50 4.53 2.75 1.91
17.75 4.55 2.77 1.85
18.00 4.58 2.79 1.79
18.25 4.60 2.81 1.73
18.50 4.62 2.83 1.67
18.75 4.64 2.85 1.61
19.00 4.66 2.87 1.55
19.25 4.68 2.89 1.49
19.50 4.70 2.90 1.44
19.75 4.71 2.92 1.38
20.00 4.73 2.93 1.32
20.25 4.75 2.95 1.27
20.50 4.76 2.96 1.25
20.75 4.78 2.98 1.24
21.00 4.79 2.99 1.23
21.25 4.81 3.00 1.22
21.50 4.83 3.02 1.20
21.75 4.84 3.03 1.19
22.00 4.86 3.04 1.18
22.25 4.87 3.06 1.17
22.50 4.89 3.07 1.16
22.75 4.90 3.08 1.15
23.00 4.91 3.10 1.14
23.25 4.93 3.11 1.12
23.50 4.94 3.12 1.11
23.75 4.96 3.13 1.10
24.00 4.97 3.15 1.09
SOUTHWICK SOLAR, LLC
Type II 24-hr 10yr Rainfall=4.97"Southwick Sed Basin Calc
Printed 6/12/2020Prepared by {enter your company name here}
Page 9HydroCAD® 10.00-12 s/n 04679 © 2014 HydroCAD Software Solutions LLC
Summary for Pond 3P: Temporary Sediment Basin
Inflow Area = 942,203 sf, 1.69% Impervious, Inflow Depth > 3.14" for 10yr event
Inflow = 89.38 cfs @ 12.06 hrs, Volume= 246,337 cf
Outflow = 9.97 cfs @ 12.64 hrs, Volume= 154,883 cf, Atten= 89%, Lag= 35.2 min
Primary = 9.97 cfs @ 12.64 hrs, Volume= 154,883 cf
Secondary = 0.00 cfs @ 0.00 hrs, Volume= 0 cf
Routing by Stor-Ind method, Time Span= 0.00-24.00 hrs, dt= 0.05 hrs
Peak Elev= 2.95' @ 12.64 hrs Surf.Area= 47,764 sf Storage= 132,847 cf
Plug-Flow detention time= 212.5 min calculated for 154,883 cf (63% of inflow)
Center-of-Mass det. time= 107.5 min ( 923.7 - 816.2 )
Volume Invert Avail.Storage Storage Description
#1 0.00' 234,667 cf 130.00'W x 325.00'L x 5.00'H Prismatoid Z=2.0
Device Routing Invert Outlet Devices
#1 Primary 0.00'18.0" Round Culvert
L= 100.0' CPP, projecting, no headwall, Ke= 0.900
Inlet / Outlet Invert= 0.00' / -1.00' S= 0.0100 '/' Cc= 0.900
n= 0.011, Flow Area= 1.77 sf
#2 Device 1 0.00'0.310 cfs Constant Flow/Skimmer
#3 Device 1 2.00'48.0" Horiz. Orifice/Grate C= 0.600
Limited to weir flow at low heads
#4 Secondary 3.00'20.0' long x 16.0' breadth Broad-Crested Rectangular Weir
Head (feet) 0.20 0.40 0.60 0.80 1.00 1.20 1.40 1.60
Coef. (English) 2.68 2.70 2.70 2.64 2.63 2.64 2.64 2.63
Primary OutFlow Max=9.97 cfs @ 12.64 hrs HW=2.95' (Free Discharge)
1=Culvert (Inlet Controls 9.97 cfs @ 5.64 fps)
2=Constant Flow/Skimmer (Passes < 0.31 cfs potential flow)
3=Orifice/Grate (Passes < 38.23 cfs potential flow)
Secondary OutFlow Max=0.00 cfs @ 0.00 hrs HW=0.00' (Free Discharge)
4=Broad-Crested Rectangular Weir ( Controls 0.00 cfs)
SOUTHWICK SOLAR, LLC
Type II 24-hr 10yr Rainfall=4.97"Southwick Sed Basin Calc
Printed 6/12/2020Prepared by {enter your company name here}
Page 10HydroCAD® 10.00-12 s/n 04679 © 2014 HydroCAD Software Solutions LLC
Pond 3P: Temporary Sediment Basin
Inflow
Outflow
Primary
Secondary
Hydrograph
Time (hours)
2423222120191817161514131211109876543210Flow (cfs)100
95
90
85
80
75
70
65
60
55
50
45
40
35
30
25
20
15
10
5
0
Inflow Area=942,203 sf
Peak Elev=2.95'
Storage=132,847 cf
89.38 cfs
9.97 cfs9.97 cfs
0.00 cfs
Pond 3P: Temporary Sediment Basin
Total
Primary
Secondary
Stage-Discharge
Discharge (cfs)
160140120100806040200Elevation (feet)5
4
3
2
1
0
Culvert + Constant Flow/Skimmer
Orifice/Grate
Broad-Crested Rectangular Weir
SOUTHWICK SOLAR, LLC
Type II 24-hr 10yr Rainfall=4.97"Southwick Sed Basin Calc
Printed 6/12/2020Prepared by {enter your company name here}
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Pond 3P: Temporary Sediment Basin
Storage
Stage-Area-Storage
Storage (cubic-feet)
200,000150,000100,00050,0000Elevation (feet)5
4
3
2
1
0
Prismatoid
SOUTHWICK SOLAR, LLC
Type II 24-hr 10yr Rainfall=4.97"Southwick Sed Basin Calc
Printed 6/12/2020Prepared by {enter your company name here}
Page 12HydroCAD® 10.00-12 s/n 04679 © 2014 HydroCAD Software Solutions LLC
Hydrograph for Pond 3P: Temporary Sediment Basin
Time
(hours)
Inflow
(cfs)
Storage
(cubic-feet)
Elevation
(feet)
Outflow
(cfs)
Primary
(cfs)
Secondary
(cfs)
0.00 0.00 0 0.00 0.00 0.00 0.00
0.50 0.00 0 0.00 0.00 0.00 0.00
1.00 0.00 0 0.00 0.00 0.00 0.00
1.50 0.00 0 0.00 0.00 0.00 0.00
2.00 0.00 0 0.00 0.00 0.00 0.00
2.50 0.00 0 0.00 0.00 0.00 0.00
3.00 0.00 0 0.00 0.00 0.00 0.00
3.50 0.00 0 0.00 0.00 0.00 0.00
4.00 0.00 0 0.00 0.00 0.00 0.00
4.50 0.00 0 0.00 0.00 0.00 0.00
5.00 0.00 0 0.00 0.00 0.00 0.00
5.50 0.00 0 0.00 0.00 0.00 0.00
6.00 0.00 0 0.00 0.00 0.00 0.00
6.50 0.03 10 0.00 0.00 0.00 0.00
7.00 0.12 142 0.00 0.00 0.00 0.00
7.50 0.22 448 0.01 0.00 0.00 0.00
8.00 0.33 941 0.02 0.00 0.00 0.00
8.50 0.50 1,657 0.04 0.01 0.01 0.00
9.00 0.75 2,745 0.06 0.02 0.02 0.00
9.50 0.97 4,259 0.10 0.04 0.04 0.00
10.00 1.30 6,126 0.14 0.09 0.09 0.00
10.50 1.93 8,742 0.21 0.18 0.18 0.00
11.00 3.02 12,638 0.30 0.31 0.31 0.00
11.50 5.51 19,379 0.45 0.31 0.31 0.00
12.00 78.69 63,570 1.46 0.31 0.31 0.00
12.50 13.81 131,931 2.93 9.93 9.93 0.00
13.00 6.74 130,291 2.90 9.85 9.85 0.00
13.50 4.98 123,186 2.75 9.50 9.50 0.00
14.00 3.90 114,401 2.56 9.05 9.05 0.00
14.50 3.32 104,961 2.36 8.53 8.53 0.00
15.00 3.00 98,861 2.23 4.90 4.90 0.00
15.50 2.67 96,585 2.18 3.53 3.53 0.00
16.00 2.35 95,401 2.16 2.87 2.87 0.00
16.50 2.14 94,629 2.14 2.48 2.48 0.00
17.00 2.02 94,140 2.13 2.25 2.25 0.00
17.50 1.91 93,789 2.12 2.08 2.08 0.00
18.00 1.79 93,498 2.12 1.94 1.94 0.00
18.50 1.67 93,230 2.11 1.82 1.82 0.00
19.00 1.55 92,972 2.10 1.70 1.70 0.00
19.50 1.44 92,716 2.10 1.58 1.58 0.00
20.00 1.32 92,433 2.09 1.48 1.48 0.00
20.50 1.25 92,156 2.09 1.38 1.38 0.00
21.00 1.23 91,969 2.08 1.31 1.31 0.00
21.50 1.20 91,842 2.08 1.26 1.26 0.00
22.00 1.18 91,746 2.08 1.23 1.23 0.00
22.50 1.16 91,665 2.08 1.20 1.20 0.00
23.00 1.14 91,592 2.07 1.17 1.17 0.00
23.50 1.11 91,524 2.07 1.15 1.15 0.00
24.00 1.09 91,457 2.07 1.12 1.12 0.00
SOUTHWICK SOLAR, LLC
Type II 24-hr 10yr Rainfall=4.97"Southwick Sed Basin Calc
Printed 6/12/2020Prepared by {enter your company name here}
Page 13HydroCAD® 10.00-12 s/n 04679 © 2014 HydroCAD Software Solutions LLC
Stage-Discharge for Pond 3P: Temporary Sediment Basin
Elevation
(feet)
Discharge
(cfs)
Primary
(cfs)
Secondary
(cfs)
0.00 0.00 0.00 0.00
0.05 0.01 0.01 0.00
0.10 0.04 0.04 0.00
0.15 0.10 0.10 0.00
0.20 0.17 0.17 0.00
0.25 0.26 0.26 0.00
0.30 0.31 0.31 0.00
0.35 0.31 0.31 0.00
0.40 0.31 0.31 0.00
0.45 0.31 0.31 0.00
0.50 0.31 0.31 0.00
0.55 0.31 0.31 0.00
0.60 0.31 0.31 0.00
0.65 0.31 0.31 0.00
0.70 0.31 0.31 0.00
0.75 0.31 0.31 0.00
0.80 0.31 0.31 0.00
0.85 0.31 0.31 0.00
0.90 0.31 0.31 0.00
0.95 0.31 0.31 0.00
1.00 0.31 0.31 0.00
1.05 0.31 0.31 0.00
1.10 0.31 0.31 0.00
1.15 0.31 0.31 0.00
1.20 0.31 0.31 0.00
1.25 0.31 0.31 0.00
1.30 0.31 0.31 0.00
1.35 0.31 0.31 0.00
1.40 0.31 0.31 0.00
1.45 0.31 0.31 0.00
1.50 0.31 0.31 0.00
1.55 0.31 0.31 0.00
1.60 0.31 0.31 0.00
1.65 0.31 0.31 0.00
1.70 0.31 0.31 0.00
1.75 0.31 0.31 0.00
1.80 0.31 0.31 0.00
1.85 0.31 0.31 0.00
1.90 0.31 0.31 0.00
1.95 0.31 0.31 0.00
2.00 0.31 0.31 0.00
2.05 0.77 0.77 0.00
2.10 1.61 1.61 0.00
2.15 2.70 2.70 0.00
2.20 3.99 3.99 0.00
2.25 5.45 5.45 0.00
2.30 7.06 7.06 0.00
2.35 8.50 8.50 0.00
2.40 8.63 8.63 0.00
2.45 8.76 8.76 0.00
2.50 8.89 8.89 0.00
2.55 9.01 9.01 0.00
Elevation
(feet)
Discharge
(cfs)
Primary
(cfs)
Secondary
(cfs)
2.60 9.14 9.14 0.00
2.65 9.26 9.26 0.00
2.70 9.38 9.38 0.00
2.75 9.50 9.50 0.00
2.80 9.62 9.62 0.00
2.85 9.73 9.73 0.00
2.90 9.85 9.85 0.00
2.95 9.96 9.96 0.00
3.00 10.08 10.08 0.00
3.05 10.79 10.19 0.60
3.10 11.99 10.30 1.69
3.15 13.52 10.41 3.11
3.20 15.31 10.51 4.79
3.25 17.33 10.62 6.71
3.30 19.57 10.73 8.84
3.35 21.99 10.83 11.16
3.40 24.60 10.94 13.66
3.45 27.34 11.04 16.30
3.50 30.23 11.14 19.09
3.55 33.27 11.24 22.03
3.60 36.44 11.34 25.10
3.65 39.58 11.44 28.14
3.70 42.81 11.54 31.27
3.75 46.12 11.63 34.49
3.80 49.51 11.73 37.78
3.85 53.17 11.83 41.34
3.90 56.92 11.92 45.00
3.95 60.77 12.02 48.75
4.00 64.71 12.11 52.60
4.05 68.85 12.20 56.65
4.10 73.09 12.29 60.80
4.15 77.44 12.39 65.05
4.20 81.88 12.48 69.41
4.25 86.36 12.57 73.79
4.30 90.92 12.66 78.26
4.35 95.57 12.75 82.82
4.40 100.30 12.83 87.46
4.45 105.02 12.92 92.10
4.50 109.82 13.01 96.82
4.55 114.70 13.09 101.60
4.60 119.64 13.18 106.45
4.65 124.75 13.27 111.48
4.70 129.94 13.35 116.59
4.75 135.21 13.43 121.77
4.80 140.55 13.52 127.03
4.85 145.96 13.60 132.36
4.90 151.44 13.68 137.76
4.95 157.00 13.77 143.23
5.00 162.62 13.85 148.78
SOUTHWICK SOLAR, LLC
Type II 24-hr 10yr Rainfall=4.97"Southwick Sed Basin Calc
Printed 6/12/2020Prepared by {enter your company name here}
Page 14HydroCAD® 10.00-12 s/n 04679 © 2014 HydroCAD Software Solutions LLC
Stage-Area-Storage for Pond 3P: Temporary Sediment Basin
Elevation
(feet)
Storage
(cubic-feet)
0.00 0
0.05 2,115
0.10 4,234
0.15 6,358
0.20 8,486
0.25 10,619
0.30 12,757
0.35 14,899
0.40 17,046
0.45 19,197
0.50 21,353
0.55 23,514
0.60 25,679
0.65 27,848
0.70 30,023
0.75 32,202
0.80 34,385
0.85 36,573
0.90 38,766
0.95 40,963
1.00 43,165
1.05 45,372
1.10 47,583
1.15 49,799
1.20 52,020
1.25 54,245
1.30 56,475
1.35 58,709
1.40 60,948
1.45 63,192
1.50 65,441
1.55 67,694
1.60 69,951
1.65 72,214
1.70 74,481
1.75 76,753
1.80 79,030
1.85 81,311
1.90 83,597
1.95 85,887
2.00 88,183
2.05 90,483
2.10 92,787
2.15 95,097
2.20 97,411
2.25 99,730
2.30 102,054
2.35 104,382
2.40 106,715
2.45 109,053
2.50 111,396
2.55 113,743
Elevation
(feet)
Storage
(cubic-feet)
2.60 116,095
2.65 118,452
2.70 120,814
2.75 123,180
2.80 125,551
2.85 127,927
2.90 130,308
2.95 132,694
3.00 135,084
3.05 137,479
3.10 139,879
3.15 142,284
3.20 144,693
3.25 147,107
3.30 149,527
3.35 151,950
3.40 154,379
3.45 156,813
3.50 159,251
3.55 161,694
3.60 164,142
3.65 166,595
3.70 169,053
3.75 171,516
3.80 173,983
3.85 176,455
3.90 178,932
3.95 181,414
4.00 183,901
4.05 186,393
4.10 188,890
4.15 191,391
4.20 193,898
4.25 196,409
4.30 198,925
4.35 201,446
4.40 203,972
4.45 206,503
4.50 209,039
4.55 211,579
4.60 214,125
4.65 216,675
4.70 219,231
4.75 221,791
4.80 224,356
4.85 226,926
4.90 229,502
4.95 232,082
5.00 234,667
Hydrology Report
Hydraflow Express Extension for Autodesk® Civil 3D® by Autodesk, Inc. Wednesday, Jun 10 2020
TEMPORARY DITCH A1
Hydrograph type = Rational Peak discharge (cfs) = 8.125
Storm frequency (yrs) = 10 Time interval (min) = 1
Drainage area (ac) = 1.900 Runoff coeff. (C) = 0.6
Rainfall Inten (in/hr) = 7.128 Tc by User (min) = 5
IDF Curve = 12052-Graham NC.IDF Rec limb factor = 1.00
Hydrograph Volume = 2,438 (cuft); 0.056 (acft)
0 5 10
Q (cfs)
0.00 0.00
2.00 2.00
4.00 4.00
6.00 6.00
8.00 8.00
10.00 10.00
Q (cfs)
Time (min)
Runoff Hydrograph
10-yr frequency
Runoff Hyd - Qp = 8.13 (cfs)
Channel Report
Hydraflow Express Extension for Autodesk® Civil 3D® by Autodesk, Inc. Friday, Jun 12 2020
TEMPORARY DITCH A1
Trapezoidal
Bottom Width (ft) = 1.00
Side Slopes (z:1) = 2.00, 2.00
Total Depth (ft) = 1.00
Invert Elev (ft) = 541.00
Slope (%) = 3.00
N-Value = 0.035
Calculations
Compute by: Known Q
Known Q (cfs) = 8.13
Highlighted
Depth (ft) = 0.77
Q (cfs) = 8.130
Area (sqft) = 1.96
Velocity (ft/s) = 4.16
Wetted Perim (ft) = 4.44
Crit Depth, Yc (ft) = 0.80
Top Width (ft) = 4.08
EGL (ft) = 1.04
0 1 2 3 4 5 6 7
Elev (ft)Depth (ft)Section
540.50 -0.50
541.00 0.00
541.50 0.50
542.00 1.00
542.50 1.50
543.00 2.00
Reach (ft)
Hydrology Report
Hydraflow Express Extension for Autodesk® Civil 3D® by Autodesk, Inc. Wednesday, Jun 10 2020
TEMPORARY DITCH A2
Hydrograph type = Rational Peak discharge (cfs) = 2.138
Storm frequency (yrs) = 10 Time interval (min) = 1
Drainage area (ac) = 0.500 Runoff coeff. (C) = 0.6
Rainfall Inten (in/hr) = 7.128 Tc by User (min) = 5
IDF Curve = 12052-Graham NC.IDF Rec limb factor = 1.00
Hydrograph Volume = 641 (cuft); 0.015 (acft)
0 5 10
Q (cfs)
0.00 0.00
1.00 1.00
2.00 2.00
3.00 3.00
Q (cfs)
Time (min)
Runoff Hydrograph
10-yr frequency
Runoff Hyd - Qp = 2.14 (cfs)
Channel Report
Hydraflow Express Extension for Autodesk® Civil 3D® by Autodesk, Inc. Friday, Jun 12 2020
TEMPORARY DITCH A2
Trapezoidal
Bottom Width (ft) = 1.00
Side Slopes (z:1) = 2.00, 2.00
Total Depth (ft) = 1.00
Invert Elev (ft) = 549.00
Slope (%) = 13.00
N-Value = 0.035
Calculations
Compute by: Known Q
Known Q (cfs) = 2.14
Highlighted
Depth (ft) = 0.28
Q (cfs) = 2.140
Area (sqft) = 0.44
Velocity (ft/s) = 4.90
Wetted Perim (ft) = 2.25
Crit Depth, Yc (ft) = 0.40
Top Width (ft) = 2.12
EGL (ft) = 0.65
0 1 2 3 4 5 6 7
Elev (ft)Depth (ft)Section
548.50 -0.50
549.00 0.00
549.50 0.50
550.00 1.00
550.50 1.50
551.00 2.00
Reach (ft)
Hydrology Report
Hydraflow Express Extension for Autodesk® Civil 3D® by Autodesk, Inc. Wednesday, Jun 10 2020
TEMPORARY DITCH B1
Hydrograph type = Rational Peak discharge (cfs) = 66.71
Storm frequency (yrs) = 10 Time interval (min) = 1
Drainage area (ac) = 15.600 Runoff coeff. (C) = 0.6
Rainfall Inten (in/hr) = 7.128 Tc by User (min) = 5
IDF Curve = 12052-Graham NC.IDF Rec limb factor = 1.00
Hydrograph Volume = 20,014 (cuft); 0.459 (acft)
0 5 10
Q (cfs)
0.00 0.00
10.00 10.00
20.00 20.00
30.00 30.00
40.00 40.00
50.00 50.00
60.00 60.00
70.00 70.00
Q (cfs)
Time (min)
Runoff Hydrograph
10-yr frequency
Runoff Hyd - Qp = 66.71 (cfs)
Channel Report
Hydraflow Express Extension for Autodesk® Civil 3D® by Autodesk, Inc. Friday, Jun 12 2020
TEMPORARY DITCH B1
Trapezoidal
Bottom Width (ft) = 5.00
Side Slopes (z:1) = 2.00, 2.00
Total Depth (ft) = 1.50
Invert Elev (ft) = 559.00
Slope (%) = 3.70
N-Value = 0.035
Calculations
Compute by: Known Q
Known Q (cfs) = 66.71
Highlighted
Depth (ft) = 1.22
Q (cfs) = 66.71
Area (sqft) = 9.08
Velocity (ft/s) = 7.35
Wetted Perim (ft) = 10.46
Crit Depth, Yc (ft) = 1.45
Top Width (ft) = 9.88
EGL (ft) = 2.06
0 2 4 6 8 10 12 14 16
Elev (ft)Depth (ft)Section
558.50 -0.50
559.00 0.00
559.50 0.50
560.00 1.00
560.50 1.50
561.00 2.00
Reach (ft)
Hydrology Report
Hydraflow Express Extension for Autodesk® Civil 3D® by Autodesk, Inc. Wednesday, Jun 10 2020
TEMPORARY DITCH B2
Hydrograph type = Rational Peak discharge (cfs) = 15.82
Storm frequency (yrs) = 10 Time interval (min) = 1
Drainage area (ac) = 3.700 Runoff coeff. (C) = 0.6
Rainfall Inten (in/hr) = 7.128 Tc by User (min) = 5
IDF Curve = 12052-Graham NC.IDF Rec limb factor = 1.00
Hydrograph Volume = 4,747 (cuft); 0.109 (acft)
0 5 10
Q (cfs)
0.00 0.00
3.00 3.00
6.00 6.00
9.00 9.00
12.00 12.00
15.00 15.00
18.00 18.00
Q (cfs)
Time (min)
Runoff Hydrograph
10-yr frequency
Runoff Hyd - Qp = 15.82 (cfs)
Channel Report
Hydraflow Express Extension for Autodesk® Civil 3D® by Autodesk, Inc. Friday, Jun 12 2020
TEMPORARY DITCH B2
Trapezoidal
Bottom Width (ft) = 3.00
Side Slopes (z:1) = 2.00, 2.00
Total Depth (ft) = 1.00
Invert Elev (ft) = 547.00
Slope (%) = 7.00
N-Value = 0.035
Calculations
Compute by: Known Q
Known Q (cfs) = 15.82
Highlighted
Depth (ft) = 0.59
Q (cfs) = 15.82
Area (sqft) = 2.47
Velocity (ft/s) = 6.41
Wetted Perim (ft) = 5.64
Crit Depth, Yc (ft) = 0.80
Top Width (ft) = 5.36
EGL (ft) = 1.23
0 1 2 3 4 5 6 7 8 9
Elev (ft)Depth (ft)Section
546.50 -0.50
547.00 0.00
547.50 0.50
548.00 1.00
548.50 1.50
549.00 2.00
Reach (ft)

Culvert Calculations:

Hydrology Report
Hydraflow Express Extension for Autodesk® Civil 3D® by Autodesk, Inc. Thursday, Jun 11 2020
DRIVEWAY CULVERT
Hydrograph type = Rational Peak discharge (cfs) = 2.138
Storm frequency (yrs) = 10 Time interval (min) = 1
Drainage area (ac) = 0.500 Runoff coeff. (C) = 0.6
Rainfall Inten (in/hr) = 7.128 Tc by User (min) = 5
IDF Curve = 12052-Graham NC.IDF Rec limb factor = 1.00
Hydrograph Volume = 641 (cuft); 0.015 (acft)
0 5 10
Q (cfs)
0.00 0.00
1.00 1.00
2.00 2.00
3.00 3.00
Q (cfs)
Time (min)
Runoff Hydrograph
10-yr frequency
Runoff Hyd - Qp = 2.14 (cfs)
Culvert Report
Hydraflow Express Extension for Autodesk® Civil 3D® by Autodesk, Inc. Thursday, Jun 11 2020
DRIVEWAY CULVERT
Invert Elev Dn (ft) = 559.50
Pipe Length (ft) = 35.00
Slope (%) = 4.91
Invert Elev Up (ft) = 561.22
Rise (in) = 15.0
Shape = Circular
Span (in) = 15.0
No. Barrels = 1
n-Value = 0.012
Culvert Type = Circular Corrugate Metal Pipe
Culvert Entrance = Projecting
Coeff. K,M,c,Y,k = 0.034, 1.5, 0.0553, 0.54, 0.9
Embankment
Top Elevation (ft) = 562.70
Top Width (ft) = 24.00
Crest Width (ft) = 50.00
Calculations
Qmin (cfs) = 2.14
Qmax (cfs) = 2.14
Tailwater Elev (ft) = (dc+D)/2
Highlighted
Qtotal (cfs) = 2.14
Qpipe (cfs) = 2.14
Qovertop (cfs) = 0.00
Veloc Dn (ft/s) = 2.22
Veloc Up (ft/s) = 3.81
HGL Dn (ft) = 560.42
HGL Up (ft) = 561.80
Hw Elev (ft) = 562.08
Hw/D (ft) = 0.69
Flow Regime = Inlet Control

Rip-Rap Apron Calculations:

Appendices
Rev. 12/93 8.06.3
APRON DEPTH IS 1.5 TIMES THE STONE
DIAMETER (18" MINIMUM DEPTH)
10 FT
(MIN. LENGTH)
0.50 FT
(MIN. d50)
STRUCTURE:
DISCHARGE:
PIPE DIA. (D)
SKIMMER BASIN A
0.38 cfs
6 in
LENGTH:
WIDTH:
d50:
DEPTH:
10 ft
10.5 ft
0.50 ft
1.5 ft
Appendices
Rev. 12/93 8.06.3
APRON DEPTH IS 1.5 TIMES THE STONE
DIAMETER (18" MINIMUM DEPTH)
10 FT
(MIN. LENGTH)
0.50 FT
(MIN. d50)
STRUCTURE:
DISCHARGE:
PIPE DIA. (D)
TEMP DITCH A1
8.13 cfs
12 in
LENGTH:
WIDTH:
d50:
DEPTH:
10 ft
11 ft
0.5 ft
1.5 ft
Appendices
Rev. 12/93 8.06.3
APRON DEPTH IS 1.5 TIMES THE STONE
DIAMETER (18" MINIMUM DEPTH)
10 FT
(MIN. LENGTH)
0.50 FT
(MIN. d50)
STRUCTURE:
DISCHARGE:
PIPE DIA. (D)
TEMP DITCH A2
2.14 cfs
12 in
LENGTH:
WIDTH:
d50:
DEPTH:
10 ft
11 ft
0.5 ft
1.5 ft
Appendices
Rev. 12/93 8.06.3
APRON DEPTH IS 1.5 TIMES THE STONE
DIAMETER (18" MINIMUM DEPTH)
10 FT
(MIN. LENGTH)
0.50 FT
(MIN. d50)
STRUCTURE:
DISCHARGE:
PIPE DIA. (D)
SEDIMENT BASIN B
9.97 cfs
18 in
LENGTH:
WIDTH:
d50:
DEPTH:
17 ft
18.5 ft
0.55 ft
1.5 ft
Appendices
Rev. 12/93 8.06.3
APRON DEPTH IS 1.5 TIMES THE STONE
DIAMETER (18" MINIMUM DEPTH)
10 FT
(MIN. LENGTH)
0.50 FT
(MIN. d50)
STRUCTURE:
DISCHARGE:
PIPE DIA. (D)
TEMP DITCH B1
66.71 cfs
18 in
LENGTH:
WIDTH:
d50:
DEPTH:
16 ft
17.5 ft
0.6 ft
1.5 ft
Appendices
Rev. 12/93 8.06.3
APRON DEPTH IS 1.5 TIMES THE STONE
DIAMETER (18" MINIMUM DEPTH)
10 FT
(MIN. LENGTH)
0.50 FT
(MIN. d50)
STRUCTURE:
DISCHARGE:
PIPE DIA. (D)
TEMP DITCH B2
15.82 cfs
12 in
LENGTH:
WIDTH:
d50:
DEPTH:
14 ft
15 ft
0.5 ft
1.5 ft

NRCS Soil Report:

United States
Department of
Agriculture
A product of the National
Cooperative Soil Survey,
a joint effort of the United
States Department of
Agriculture and other
Federal agencies, State
agencies including the
Agricultural Experiment
Stations, and local
participants
Custom Soil Resource
Report for
Alamance County,
North Carolina
SOUTHWICK SOLAR, LLC
Natural
Resources
Conservation
Service
June 8, 2020
Preface
Soil surveys contain information that affects land use planning in survey areas.
They highlight soil limitations that affect various land uses and provide information
about the properties of the soils in the survey areas. Soil surveys are designed for
many different users, including farmers, ranchers, foresters, agronomists, urban
planners, community officials, engineers, developers, builders, and home buyers.
Also, conservationists, teachers, students, and specialists in recreation, waste
disposal, and pollution control can use the surveys to help them understand,
protect, or enhance the environment.
Various land use regulations of Federal, State, and local governments may impose
special restrictions on land use or land treatment. Soil surveys identify soil
properties that are used in making various land use or land treatment decisions.
The information is intended to help the land users identify and reduce the effects of
soil limitations on various land uses. The landowner or user is responsible for
identifying and complying with existing laws and regulations.
Although soil survey information can be used for general farm, local, and wider area
planning, onsite investigation is needed to supplement this information in some
cases. Examples include soil quality assessments (http://www.nrcs.usda.gov/wps/
portal/nrcs/main/soils/health/) and certain conservation and engineering
applications. For more detailed information, contact your local USDA Service Center
(https://offices.sc.egov.usda.gov/locator/app?agency=nrcs) or your NRCS State Soil
Scientist (http://www.nrcs.usda.gov/wps/portal/nrcs/detail/soils/contactus/?
cid=nrcs142p2_053951).
Great differences in soil properties can occur within short distances. Some soils are
seasonally wet or subject to flooding. Some are too unstable to be used as a
foundation for buildings or roads. Clayey or wet soils are poorly suited to use as
septic tank absorption fields. A high water table makes a soil poorly suited to
basements or underground installations.
The National Cooperative Soil Survey is a joint effort of the United States
Department of Agriculture and other Federal agencies, State agencies including the
Agricultural Experiment Stations, and local agencies. The Natural Resources
Conservation Service (NRCS) has leadership for the Federal part of the National
Cooperative Soil Survey.
Information about soils is updated periodically. Updated information is available
through the NRCS Web Soil Survey, the site for official soil survey information.
The U.S. Department of Agriculture (USDA) prohibits discrimination in all its
programs and activities on the basis of race, color, national origin, age, disability,
and where applicable, sex, marital status, familial status, parental status, religion,
sexual orientation, genetic information, political beliefs, reprisal, or because all or a
part of an individual's income is derived from any public assistance program. (Not
all prohibited bases apply to all programs.) Persons with disabilities who require
2
alternative means for communication of program information (Braille, large print,
audiotape, etc.) should contact USDA's TARGET Center at [phone] (voice
and TDD). To file a complaint of discrimination, write to USDA, Director, Office of
Civil Rights, 1400 Independence Avenue, S.W., Washington, D.C. 20250-9410 or
call [phone] (voice) or [phone] (TDD). USDA is an equal opportunity
provider and employer.
3
Contents
Preface....................................................................................................................2
How Soil Surveys Are Made..................................................................................5
Soil Map..................................................................................................................8
Soil Map................................................................................................................9
Legend................................................................................................................10
Map Unit Legend................................................................................................11
Map Unit Descriptions.........................................................................................11
Alamance County, North Carolina...................................................................13
CnB2—Cullen clay loam, 2 to 6 percent slopes, moderately eroded..........13
CnC2—Cullen clay loam, 6 to 10 percent slopes, moderately eroded........14
CnD2—Cullen clay loam, 10 to 15 percent slopes, moderately eroded......15
CnE2—Cullen clay loam, 15 to 45 percent slopes, moderately eroded......16
RvA—Riverview loam, 0 to 2 percent slopes, occasionally flooded............17
W—Water....................................................................................................18
References............................................................................................................20
4
How Soil Surveys Are Made
Soil surveys are made to provide information about the soils and miscellaneous
areas in a specific area. They include a description of the soils and miscellaneous
areas and their location on the landscape and tables that show soil properties and
limitations affecting various uses. Soil scientists observed the steepness, length,
and shape of the slopes; the general pattern of drainage; the kinds of crops and
native plants; and the kinds of bedrock. They observed and described many soil
profiles. A soil profile is the sequence of natural layers, or horizons, in a soil. The
profile extends from the surface down into the unconsolidated material in which the
soil formed or from the surface down to bedrock. The unconsolidated material is
devoid of roots and other living organisms and has not been changed by other
biological activity.
Currently, soils are mapped according to the boundaries of major land resource
areas (MLRAs). MLRAs are geographically associated land resource units that
share common characteristics related to physiography, geology, climate, water
resources, soils, biological resources, and land uses (USDA, 2006). Soil survey
areas typically consist of parts of one or more MLRA.
The soils and miscellaneous areas in a survey area occur in an orderly pattern that
is related to the geology, landforms, relief, climate, and natural vegetation of the
area. Each kind of soil and miscellaneous area is associated with a particular kind
of landform or with a segment of the landform. By observing the soils and
miscellaneous areas in the survey area and relating their position to specific
segments of the landform, a soil scientist develops a concept, or model, of how they
were formed. Thus, during mapping, this model enables the soil scientist to predict
with a considerable degree of accuracy the kind of soil or miscellaneous area at a
specific location on the landscape.
Commonly, individual soils on the landscape merge into one another as their
characteristics gradually change. To construct an accurate soil map, however, soil
scientists must determine the boundaries between the soils. They can observe only
a limited number of soil profiles. Nevertheless, these observations, supplemented
by an understanding of the soil-vegetation-landscape relationship, are sufficient to
verify predictions of the kinds of soil in an area and to determine the boundaries.
Soil scientists recorded the characteristics of the soil profiles that they studied. They
noted soil color, texture, size and shape of soil aggregates, kind and amount of rock
fragments, distribution of plant roots, reaction, and other features that enable them
to identify soils. After describing the soils in the survey area and determining their
properties, the soil scientists assigned the soils to taxonomic classes (units).
Taxonomic classes are concepts. Each taxonomic class has a set of soil
characteristics with precisely defined limits. The classes are used as a basis for
comparison to classify soils systematically. Soil taxonomy, the system of taxonomic
classification used in the United States, is based mainly on the kind and character
of soil properties and the arrangement of horizons within the profile. After the soil
5
scientists classified and named the soils in the survey area, they compared the
individual soils with similar soils in the same taxonomic class in other areas so that
they could confirm data and assemble additional data based on experience and
research.
The objective of soil mapping is not to delineate pure map unit components; the
objective is to separate the landscape into landforms or landform segments that
have similar use and management requirements. Each map unit is defined by a
unique combination of soil components and/or miscellaneous areas in predictable
proportions. Some components may be highly contrasting to the other components
of the map unit. The presence of minor components in a map unit in no way
diminishes the usefulness or accuracy of the data. The delineation of such
landforms and landform segments on the map provides sufficient information for the
development of resource plans. If intensive use of small areas is planned, onsite
investigation is needed to define and locate the soils and miscellaneous areas.
Soil scientists make many field observations in the process of producing a soil map.
The frequency of observation is dependent upon several factors, including scale of
mapping, intensity of mapping, design of map units, complexity of the landscape,
and experience of the soil scientist. Observations are made to test and refine the
soil-landscape model and predictions and to verify the classification of the soils at
specific locations. Once the soil-landscape model is refined, a significantly smaller
number of measurements of individual soil properties are made and recorded.
These measurements may include field measurements, such as those for color,
depth to bedrock, and texture, and laboratory measurements, such as those for
content of sand, silt, clay, salt, and other components. Properties of each soil
typically vary from one point to another across the landscape.
Observations for map unit components are aggregated to develop ranges of
characteristics for the components. The aggregated values are presented. Direct
measurements do not exist for every property presented for every map unit
component. Values for some properties are estimated from combinations of other
properties.
While a soil survey is in progress, samples of some of the soils in the area generally
are collected for laboratory analyses and for engineering tests. Soil scientists
interpret the data from these analyses and tests as well as the field-observed
characteristics and the soil properties to determine the expected behavior of the
soils under different uses. Interpretations for all of the soils are field tested through
observation of the soils in different uses and under different levels of management.
Some interpretations are modified to fit local conditions, and some new
interpretations are developed to meet local needs. Data are assembled from other
sources, such as research information, production records, and field experience of
specialists. For example, data on crop yields under defined levels of management
are assembled from farm records and from field or plot experiments on the same
kinds of soil.
Predictions about soil behavior are based not only on soil properties but also on
such variables as climate and biological activity. Soil conditions are predictable over
long periods of time, but they are not predictable from year to year. For example,
soil scientists can predict with a fairly high degree of accuracy that a given soil will
have a high water table within certain depths in most years, but they cannot predict
that a high water table will always be at a specific level in the soil on a specific date.
After soil scientists located and identified the significant natural bodies of soil in the
survey area, they drew the boundaries of these bodies on aerial photographs and
Custom Soil Resource Report
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identified each as a specific map unit. Aerial photographs show trees, buildings,
fields, roads, and rivers, all of which help in locating boundaries accurately.
Custom Soil Resource Report
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Soil Map
The soil map section includes the soil map for the defined area of interest, a list of
soil map units on the map and extent of each map unit, and cartographic symbols
displayed on the map. Also presented are various metadata about data used to
produce the map, and a description of each soil map unit.
8
9
Custom Soil Resource Report
Soil Map
398610039862003986300398640039865003986600398620039863003986400398650039866003986700646700 646800 646900 647000 647100 647200 647300 647400 647500 647600
646700 646800 646900 647000 647100 647200 647300 647400 647500 647600
36° 0' 49'' N 79° 22' 21'' W36° 0' 49'' N79° 21' 43'' W36° 0' 29'' N
79° 22' 21'' W36° 0' 29'' N
79° 21' 43'' WN
Map projection: Web Mercator Corner coordinates: WGS84 Edge tics: UTM Zone 17N WGS84
0 200 400 800 1200
Feet
0 50 100 200 300
Meters
Map Scale: 1:4,310 if printed on A landscape (11" x 8.5") sheet.
Soil Map may not be valid at this scale.
MAP LEGEND MAP INFORMATION
Area of Interest (AOI)
Area of Interest (AOI)
Soils
Soil Map Unit Polygons
Soil Map Unit Lines
Soil Map Unit Points
Special Point Features
Blowout
Borrow Pit
Clay Spot
Closed Depression
Gravel Pit
Gravelly Spot
Landfill
Lava Flow
Marsh or swamp
Mine or Quarry
Miscellaneous Water
Perennial Water
Rock Outcrop
Saline Spot
Sandy Spot
Severely Eroded Spot
Sinkhole
Slide or Slip
Sodic Spot
Spoil Area
Stony Spot
Very Stony Spot
Wet Spot
Other
Special Line Features
Water Features
Streams and Canals
Transportation
Rails
Interstate Highways
US Routes
Major Roads
Local Roads
Background
Aerial Photography
The soil surveys that comprise your AOI were mapped at
1:12,000.
Warning: Soil Map may not be valid at this scale.
Enlargement of maps beyond the scale of mapping can cause
misunderstanding of the detail of mapping and accuracy of soil
line placement. The maps do not show the small areas of
contrasting soils that could have been shown at a more detailed
scale.
Please rely on the bar scale on each map sheet for map
measurements.
Source of Map: Natural Resources Conservation Service
Web Soil Survey URL:
Coordinate System: Web Mercator (EPSG:3857)
Maps from the Web Soil Survey are based on the Web Mercator
projection, which preserves direction and shape but distorts
distance and area. A projection that preserves area, such as the
Albers equal-area conic projection, should be used if more
accurate calculations of distance or area are required.
This product is generated from the USDA-NRCS certified data as
of the version date(s) listed below.
Soil Survey Area: Alamance County, North Carolina
Survey Area Data: Version 18, Sep 16, 2019
Soil map units are labeled (as space allows) for map scales
1:50,000 or larger.
Date(s) aerial images were photographed: Oct 24, 2018—Oct
30, 2018
The orthophoto or other base map on which the soil lines were
compiled and digitized probably differs from the background
imagery displayed on these maps. As a result, some minor
shifting of map unit boundaries may be evident.
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Map Unit Legend
Map Unit Symbol Map Unit Name Acres in AOI Percent of AOI
CnB2 Cullen clay loam, 2 to 6 percent
slopes, moderately eroded
19.7 32.2%
CnC2 Cullen clay loam, 6 to 10
percent slopes, moderately
eroded
8.7 14.3%
CnD2 Cullen clay loam, 10 to 15
percent slopes, moderately
eroded
4.8 7.8%
CnE2 Cullen clay loam, 15 to 45
percent slopes, moderately
eroded
13.3 21.7%
RvA Riverview loam, 0 to 2 percent
slopes, occasionally flooded
14.4 23.5%
W Water 0.3 0.5%
Totals for Area of Interest 61.1 100.0%
Map Unit Descriptions
The map units delineated on the detailed soil maps in a soil survey represent the
soils or miscellaneous areas in the survey area. The map unit descriptions, along
with the maps, can be used to determine the composition and properties of a unit.
A map unit delineation on a soil map represents an area dominated by one or more
major kinds of soil or miscellaneous areas. A map unit is identified and named
according to the taxonomic classification of the dominant soils. Within a taxonomic
class there are precisely defined limits for the properties of the soils. On the
landscape, however, the soils are natural phenomena, and they have the
characteristic variability of all natural phenomena. Thus, the range of some
observed properties may extend beyond the limits defined for a taxonomic class.
Areas of soils of a single taxonomic class rarely, if ever, can be mapped without
including areas of other taxonomic classes. Consequently, every map unit is made
up of the soils or miscellaneous areas for which it is named and some minor
components that belong to taxonomic classes other than those of the major soils.
Most minor soils have properties similar to those of the dominant soil or soils in the
map unit, and thus they do not affect use and management. These are called
noncontrasting, or similar, components. They may or may not be mentioned in a
particular map unit description. Other minor components, however, have properties
and behavioral characteristics divergent enough to affect use or to require different
management. These are called contrasting, or dissimilar, components. They
generally are in small areas and could not be mapped separately because of the
scale used. Some small areas of strongly contrasting soils or miscellaneous areas
are identified by a special symbol on the maps. If included in the database for a
given area, the contrasting minor components are identified in the map unit
descriptions along with some characteristics of each. A few areas of minor
Custom Soil Resource Report
11
components may not have been observed, and consequently they are not
mentioned in the descriptions, especially where the pattern was so complex that it
was impractical to make enough observations to identify all the soils and
miscellaneous areas on the landscape.
The presence of minor components in a map unit in no way diminishes the
usefulness or accuracy of the data. The objective of mapping is not to delineate
pure taxonomic classes but rather to separate the landscape into landforms or
landform segments that have similar use and management requirements. The
delineation of such segments on the map provides sufficient information for the
development of resource plans. If intensive use of small areas is planned, however,
onsite investigation is needed to define and locate the soils and miscellaneous
areas.
An identifying symbol precedes the map unit name in the map unit descriptions.
Each description includes general facts about the unit and gives important soil
properties and qualities.
Soils that have profiles that are almost alike make up a soil series. Except for
differences in texture of the surface layer, all the soils of a series have major
horizons that are similar in composition, thickness, and arrangement.
Soils of one series can differ in texture of the surface layer, slope, stoniness,
salinity, degree of erosion, and other characteristics that affect their use. On the
basis of such differences, a soil series is divided into soil phases. Most of the areas
shown on the detailed soil maps are phases of soil series. The name of a soil phase
commonly indicates a feature that affects use or management. For example, Alpha
silt loam, 0 to 2 percent slopes, is a phase of the Alpha series.
Some map units are made up of two or more major soils or miscellaneous areas.
These map units are complexes, associations, or undifferentiated groups.
A complex consists of two or more soils or miscellaneous areas in such an intricate
pattern or in such small areas that they cannot be shown separately on the maps.
The pattern and proportion of the soils or miscellaneous areas are somewhat similar
in all areas. Alpha-Beta complex, 0 to 6 percent slopes, is an example.
An association is made up of two or more geographically associated soils or
miscellaneous areas that are shown as one unit on the maps. Because of present
or anticipated uses of the map units in the survey area, it was not considered
practical or necessary to map the soils or miscellaneous areas separately. The
pattern and relative proportion of the soils or miscellaneous areas are somewhat
similar. Alpha-Beta association, 0 to 2 percent slopes, is an example.
An undifferentiated group is made up of two or more soils or miscellaneous areas
that could be mapped individually but are mapped as one unit because similar
interpretations can be made for use and management. The pattern and proportion
of the soils or miscellaneous areas in a mapped area are not uniform. An area can
be made up of only one of the major soils or miscellaneous areas, or it can be made
up of all of them. Alpha and Beta soils, 0 to 2 percent slopes, is an example.
Some surveys include miscellaneous areas. Such areas have little or no soil
material and support little or no vegetation. Rock outcrop is an example.
Custom Soil Resource Report
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Alamance County, North Carolina
CnB2—Cullen clay loam, 2 to 6 percent slopes, moderately eroded
Map Unit Setting
National map unit symbol: 2xn4j
Elevation: 330 to 980 feet
Mean annual precipitation: 39 to 47 inches
Mean annual air temperature: 55 to 63 degrees F
Frost-free period: 200 to 250 days
Farmland classification: All areas are prime farmland
Map Unit Composition
Cullen, moderately eroded, and similar soils: 95 percent
Minor components: 5 percent
Estimates are based on observations, descriptions, and transects of the mapunit.
Description of Cullen, Moderately Eroded
Setting
Landform: Interfluves
Landform position (two-dimensional): Summit
Landform position (three-dimensional): Interfluve
Down-slope shape: Convex
Across-slope shape: Convex
Parent material: Mixed residuum weathered from igneous and metamorphic rock
Typical profile
Ap - 0 to 10 inches: clay loam
Bt - 10 to 50 inches: clay
BC - 50 to 69 inches: silty clay
CB - 69 to 80 inches: silty clay loam
Properties and qualities
Slope: 2 to 6 percent
Depth to restrictive feature: More than 80 inches
Natural drainage class: Well drained
Capacity of the most limiting layer to transmit water (Ksat): Moderately high to
high (0.57 to 1.98 in/hr)
Depth to water table: More than 80 inches
Frequency of flooding: None
Frequency of ponding: None
Available water storage in profile: Moderate (about 7.2 inches)
Interpretive groups
Land capability classification (irrigated): None specified
Land capability classification (nonirrigated): 3e
Hydrologic Soil Group: B
Hydric soil rating: No
Minor Components
Enon, moderately eroded
Percent of map unit: 5 percent
Landform: Interfluves
Landform position (two-dimensional): Summit
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Landform position (three-dimensional): Interfluve
Down-slope shape: Convex
Across-slope shape: Convex
Hydric soil rating: No
CnC2—Cullen clay loam, 6 to 10 percent slopes, moderately eroded
Map Unit Setting
National map unit symbol: 2xn4k
Elevation: 330 to 980 feet
Mean annual precipitation: 39 to 47 inches
Mean annual air temperature: 55 to 63 degrees F
Frost-free period: 200 to 250 days
Farmland classification: Farmland of statewide importance
Map Unit Composition
Cullen, moderately eroded, and similar soils: 95 percent
Minor components: 5 percent
Estimates are based on observations, descriptions, and transects of the mapunit.
Description of Cullen, Moderately Eroded
Setting
Landform: Interfluves
Landform position (two-dimensional): Backslope, shoulder
Landform position (three-dimensional): Side slope
Down-slope shape: Concave
Across-slope shape: Linear
Parent material: Mixed residuum weathered from igneous and metamorphic rock
Typical profile
Ap - 0 to 10 inches: clay loam
Bt - 10 to 50 inches: clay
BC - 50 to 69 inches: silty clay
CB - 69 to 80 inches: silty clay loam
Properties and qualities
Slope: 6 to 10 percent
Depth to restrictive feature: More than 80 inches
Natural drainage class: Well drained
Capacity of the most limiting layer to transmit water (Ksat): Moderately high to
high (0.57 to 1.98 in/hr)
Depth to water table: More than 80 inches
Frequency of flooding: None
Frequency of ponding: None
Available water storage in profile: Moderate (about 7.2 inches)
Interpretive groups
Land capability classification (irrigated): None specified
Land capability classification (nonirrigated): 3e
Hydrologic Soil Group: B
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Hydric soil rating: No
Minor Components
Enon, moderately eroded
Percent of map unit: 5 percent
Landform: Interfluves
Landform position (two-dimensional): Backslope, shoulder
Landform position (three-dimensional): Side slope
Down-slope shape: Concave
Across-slope shape: Linear
Hydric soil rating: No
CnD2—Cullen clay loam, 10 to 15 percent slopes, moderately eroded
Map Unit Setting
National map unit symbol: 2xn4l
Elevation: 330 to 980 feet
Mean annual precipitation: 39 to 47 inches
Mean annual air temperature: 55 to 63 degrees F
Frost-free period: 200 to 250 days
Farmland classification: Farmland of statewide importance
Map Unit Composition
Cullen, moderately eroded, and similar soils: 95 percent
Minor components: 5 percent
Estimates are based on observations, descriptions, and transects of the mapunit.
Description of Cullen, Moderately Eroded
Setting
Landform: Interfluves
Landform position (two-dimensional): Backslope
Landform position (three-dimensional): Side slope
Down-slope shape: Concave
Across-slope shape: Linear
Parent material: Mixed residuum weathered from igneous and metamorphic rock
Typical profile
Ap - 0 to 10 inches: clay loam
Bt - 10 to 50 inches: clay
BC - 50 to 69 inches: silty clay
CB - 69 to 80 inches: silty clay loam
Properties and qualities
Slope: 10 to 15 percent
Depth to restrictive feature: More than 80 inches
Natural drainage class: Well drained
Capacity of the most limiting layer to transmit water (Ksat): Moderately high to
high (0.57 to 1.98 in/hr)
Depth to water table: More than 80 inches
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Frequency of flooding: None
Frequency of ponding: None
Available water storage in profile: Moderate (about 7.2 inches)
Interpretive groups
Land capability classification (irrigated): None specified
Land capability classification (nonirrigated): 4e
Hydrologic Soil Group: B
Hydric soil rating: No
Minor Components
Enon, moderately eroded
Percent of map unit: 5 percent
Landform: Interfluves
Landform position (two-dimensional): Backslope
Landform position (three-dimensional): Side slope
Down-slope shape: Concave
Across-slope shape: Linear
Hydric soil rating: No
CnE2—Cullen clay loam, 15 to 45 percent slopes, moderately eroded
Map Unit Setting
National map unit symbol: 2xn4m
Elevation: 330 to 980 feet
Mean annual precipitation: 39 to 47 inches
Mean annual air temperature: 55 to 63 degrees F
Frost-free period: 200 to 250 days
Farmland classification: Not prime farmland
Map Unit Composition
Cullen, moderately eroded, and similar soils: 95 percent
Minor components: 5 percent
Estimates are based on observations, descriptions, and transects of the mapunit.
Description of Cullen, Moderately Eroded
Setting
Landform: Interfluves
Landform position (two-dimensional): Backslope
Landform position (three-dimensional): Side slope
Down-slope shape: Concave
Across-slope shape: Linear
Parent material: Mixed residuum weathered from igneous and metamorphic rock
Typical profile
Ap - 0 to 10 inches: clay loam
Bt - 10 to 50 inches: clay
BC - 50 to 69 inches: silty clay
CB - 69 to 80 inches: silty clay loam
Custom Soil Resource Report
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Properties and qualities
Slope: 15 to 45 percent
Depth to restrictive feature: More than 80 inches
Natural drainage class: Well drained
Capacity of the most limiting layer to transmit water (Ksat): Moderately high to
high (0.57 to 1.98 in/hr)
Depth to water table: More than 80 inches
Frequency of flooding: None
Frequency of ponding: None
Available water storage in profile: Moderate (about 7.2 inches)
Interpretive groups
Land capability classification (irrigated): None specified
Land capability classification (nonirrigated): 6e
Hydrologic Soil Group: B
Hydric soil rating: No
Minor Components
Enon, moderately eroded
Percent of map unit: 5 percent
Landform: Interfluves
Landform position (two-dimensional): Backslope
Landform position (three-dimensional): Side slope
Down-slope shape: Concave
Across-slope shape: Linear
Hydric soil rating: No
RvA—Riverview loam, 0 to 2 percent slopes, occasionally flooded
Map Unit Setting
National map unit symbol: 2xn63
Elevation: 330 to 660 feet
Mean annual precipitation: 39 to 47 inches
Mean annual air temperature: 55 to 63 degrees F
Frost-free period: 200 to 250 days
Farmland classification: All areas are prime farmland
Map Unit Composition
Riverview, occasionally flooded, and similar soils: 90 percent
Minor components: 10 percent
Estimates are based on observations, descriptions, and transects of the mapunit.
Description of Riverview, Occasionally Flooded
Setting
Landform: Flood plains
Landform position (two-dimensional): Toeslope
Landform position (three-dimensional): Tread
Down-slope shape: Linear
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Across-slope shape: Linear
Parent material: Loamy alluvium derived from igneous and metamorphic rock
Typical profile
A - 0 to 8 inches: loam
Bw - 8 to 48 inches: loam
C - 48 to 80 inches: sandy loam
Properties and qualities
Slope: 0 to 2 percent
Depth to restrictive feature: More than 80 inches
Natural drainage class: Well drained
Capacity of the most limiting layer to transmit water (Ksat): Moderately high to
high (0.57 to 1.98 in/hr)
Depth to water table: More than 80 inches
Frequency of flooding: Occasional
Frequency of ponding: None
Available water storage in profile: Very high (about 12.0 inches)
Interpretive groups
Land capability classification (irrigated): None specified
Land capability classification (nonirrigated): 2w
Hydrologic Soil Group: B
Hydric soil rating: No
Minor Components
Buncombe, frequently flooded
Percent of map unit: 5 percent
Landform: Flood plains
Landform position (two-dimensional): Toeslope
Landform position (three-dimensional): Tread
Down-slope shape: Linear
Across-slope shape: Linear
Hydric soil rating: No
Chewacla, frequently flooded
Percent of map unit: 5 percent
Landform: Flood plains
Landform position (two-dimensional): Toeslope
Landform position (three-dimensional): Tread
Down-slope shape: Linear
Across-slope shape: Linear
Hydric soil rating: No
W—Water
Map Unit Composition
Water: 100 percent
Estimates are based on observations, descriptions, and transects of the mapunit.
Custom Soil Resource Report
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Description of Water
Interpretive groups
Land capability classification (irrigated): None specified
Land capability classification (nonirrigated): 8w
Hydric soil rating: No
Custom Soil Resource Report
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References
American Association of State Highway and Transportation Officials (AASHTO).
2004. Standard specifications for transportation materials and methods of sampling
and testing. 24th edition.
American Society for Testing and Materials (ASTM). 2005. Standard classification of
soils for engineering purposes. ASTM Standard D2487-00.
Cowardin, L.M., V. Carter, F.C. Golet, and E.T. LaRoe. 1979. Classification of
wetlands and deep-water habitats of the United States. U.S. Fish and Wildlife
Service FWS/OBS-79/31.
Federal Register. July 13, 1994. Changes in hydric soils of the United States.
Federal Register. September 18, 2002. Hydric soils of the United States.
Hurt, G.W., and L.M. Vasilas, editors. Version 6.0, 2006. Field indicators of hydric
soils in the United States.
National Research Council. 1995. Wetlands: Characteristics and boundaries.
Soil Survey Division Staff. 1993. Soil survey manual. Soil Conservation Service.
U.S. Department of Agriculture Handbook 18. http://www.nrcs.usda.gov/wps/portal/
nrcs/detail/national/soils/?cid=nrcs142p2_054262
Soil Survey Staff. 1999. Soil taxonomy: A basic system of soil classification for
making and interpreting soil surveys. 2nd edition. Natural Resources Conservation
Service, U.S. Department of Agriculture Handbook 436. http://
www.nrcs.usda.gov/wps/portal/nrcs/detail/national/soils/?cid=nrcs142p2_053577
Soil Survey Staff. 2010. Keys to soil taxonomy. 11th edition. U.S. Department of
Agriculture, Natural Resources Conservation Service. http://
www.nrcs.usda.gov/wps/portal/nrcs/detail/national/soils/?cid=nrcs142p2_053580
Tiner, R.W., Jr. 1985. Wetlands of Delaware. U.S. Fish and Wildlife Service and
Delaware Department of Natural Resources and Environmental Control, Wetlands
Section.
United States Army Corps of Engineers, Environmental Laboratory. 1987. Corps of
Engineers wetlands delineation manual. Waterways Experiment Station Technical
Report Y-87-1.
United States Department of Agriculture, Natural Resources Conservation Service.
National forestry manual. http://www.nrcs.usda.gov/wps/portal/nrcs/detail/soils/
home/?cid=nrcs142p2_053374
United States Department of Agriculture, Natural Resources Conservation Service.
National range and pasture handbook. http://www.nrcs.usda.gov/wps/portal/nrcs/
detail/national/landuse/rangepasture/?cid=stelprdb1043084
20
United States Department of Agriculture, Natural Resources Conservation Service.
National soil survey handbook, title 430-VI. http://www.nrcs.usda.gov/wps/portal/
nrcs/detail/soils/scientists/?cid=nrcs142p2_054242
United States Department of Agriculture, Natural Resources Conservation Service.
2006. Land resource regions and major land resource areas of the United States,
the Caribbean, and the Pacific Basin. U.S. Department of Agriculture Handbook
296. http://www.nrcs.usda.gov/wps/portal/nrcs/detail/national/soils/?
cid=nrcs142p2_053624
United States Department of Agriculture, Soil Conservation Service. 1961. Land
capability classification. U.S. Department of Agriculture Handbook 210. http://
www.nrcs.usda.gov/Internet/FSE_DOCUMENTS/nrcs142p2_052290.pdf
Custom Soil Resource Report
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Figures:

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36.0000°
36.1250°
-79.3750°-79.2500°
36.1250°
36.0000°-79.2500°-79.3750°
QUADRANGLE LOCATION
MEBANE QUADRANGLE
NORTH CAROLINA
7.5-MINUTE SERIES
MEBANE, NC
2019
Expressway Local Connector
ROAD CLASSIFICATION
Ramp 4WD
Secondary Hwy Local Road
Interstate Route State RouteUS RouteWX./H
U.S. DEPARTMENT OF THE INTERIOR
U.S. GEOLOGICAL SURVEY

This map was produced to conform with the
National Geospatial Program US Topo Product Standard, 2011.
A metadata file associated with this product is draft version 0.6.18
CONTOUR INTERVAL 10 FEET
NORTH AMERICAN VERTICAL DATUM OF 1988
SCALE 1:24 000
1000 500 0 METERS 1000 2000
21KILOMETERS00.51
10.50
MILES
1
1000 0 1000 2000 3000 4000 5000 6000 7000 8000 9000 10000
FEET
×
Ø
GN
MN
1°0´
18 MILS
8°57´
159 MILS
UTM GRID AND 2019 MAGNETIC NORTH
DECLINATION AT CENTER OF SHEET
PV
Grid Zone Designation17S
U.S. National Grid
100,000 - m Square ID
NORTH
CAROLINA
1 Lake Burlington
8 White Cross
2 Burlington NE
3 Cedar Grove
4 Burlington
5 Efland
6 Snow Camp
7 Saxapahaw
ADJOINING QUADRANGLES
2
6
54
13
87
Imagery.....................................................NAIP, May 2016 - November 2016
Roads......................................... U.S. Census Bureau, 2016
Names............................................................................GNIS, 1980 - 2019
Hydrography...............................National Hydrography Dataset, 2001
Contours............................................National Elevation Dataset, 2008
Boundaries..............Multiple sources; see metadata file 2017 - 2018
Wetlands.................FWS National Wetlands Inventory 1982 - 1983
North American Datum of 1983 (NAD83)
World Geodetic System of 1984 (WGS84). Projection and
1 000-meter grid:Universal Transverse Mercator, Zone 17S
Produced by the United States Geological Survey
This map is not a legal document. Boundaries may be
generalized for this map scale. Private lands within government
reservations may not be shown. Obtain permission before
entering private lands.*7643016378981*NSN.7643016378981NGA REF NO.USGSX24K28608PROJECT LOCATION
USGS The National Map: Orthoimagery. Data refreshed April, 2019.
National Flood Hazard Layer FIRMette
0 500 1,000 1,500 2,000250Feet
Ü79°22'32.78"W 36°0'52.43"N 79°21'55.32"W 36°0'23.33"N
SEE FIS REPORT FOR DETAILED LEGEND AND INDEX MAP FOR FIRM PANEL LAYOUT
SPECIAL FLOODHAZARD AR EAS
Without Base Flood Elevation (BFE)Zone A, V, A99With BFE or Depth Zone AE, AO, AH, VE, AR
Regulator y Floodway
0.2% Annual Chance Flood Hazard, Areasof 1% annual chance flood with averagedepth less than one foot or with drainageareas of less than one square mile Zone X
Future Conditions 1% AnnualChance Flood Hazard Zone XArea with Reduced Flood Risk due toLevee. See Notes.Zone X
Area with Flood Risk due to Levee Zone D
NO SCREE N Area of Minimal Flood Hazard Zone X
Area of Undetermined Flood Hazard Zone D
Channel, Culver t, or Storm SewerLevee, Dike, or Floodwall
Cross Sections with 1% Annual Chance17.5 Water Surface ElevationCoastal Transect
Coastal Transect BaselineProfile BaselineHydrographic Feature
Base Flood Elevation Line (BFE)
Effective LOMRs
Limit of StudyJurisdiction Boundar y
Digital Data Available
No Digital Data Available
Unmapped
This map complies with FEMA's standards for the use of digital flood maps if it is not void as described below. The basemap shown complies with FEMA's basemap accuracy standards
The flood hazard information is derived directly from theauthoritative NFHL web ser vices provided by FEMA. This mapwas exported on 6/11/2020 at 3:41:22 PM and does notreflect changes or amendments subsequent to this date andtime. The NFHL and effective information may change orbecome superseded by new data over time.
This map image is void if the one or more of the following mapelements do not appear: basemap imagery, flood zone labels,legend, scale bar, map creation date, community identifiers,FIRM panel number, and FIRM effective date. Map images forunmapped and unmodernized areas cannot be used forregulatory purposes.
Legend
OTHER AREAS OFFLOOD HAZARD
OTHER AREAS
GENERALSTRUCTURES
OTHERFEATURES
MAP PANELS
8
1:6,000
B 20.2
The pin displayed on the map is an approximate point selected by the user and does not represent an authoritative proper ty location.