20190687 Ver 1_R5870_HYD_SMP_20190528

North Carolina Department of Transportation °— °`,
Highway Stormwater Program =�
STORMWATER MANAGEMENT PLAN
(Version 2.08; Released April 2018) :Y FOR NCDOT PROJECTS
WBS Element: 47917.1.1 TIP No.: R-5870 County(ies): Alexander Page 1 of 2
General Project Information
WBS Element:
47917.1.1 TIP Number: R-5870 Project Type: New Location Date: 3/4/2019
NCDOT Contact:
Bryan K. Sowell, P.E.
Contractor / Desi ner:
DRMP /Ran P. Mitchell, P.E.
Address:
Highway Division 12
1710 E. Marion Street (US-74 Business)
Shelby, NC 28151
Address:
8000 Regency Parkway
Suite 110
Cary, NC 27518
Phone:
980 552-4208
Phone:
919 650-1038
Email:
bksowell ncdot. ov
Email:
ritcheII drm
.com
City/Town:
Ta lorsville
Count ies :
Alexander
River Basin(s):
Yadkin -Pee Dee
ICAMA County?
No
Wetlands within Project Limits?
No
Project Description
Project Length (lin. miles or feet):
0.492 mi I Surrounding Land Use: I Undeveloped/Open Land
Proposed Project
Existing Site
Project Built -Upon Area ac.
1.54 ac.
0.76 ac.
Typical Cross Section Description:
One (1) 12' travel lane each direction. 2' unpaved shoulders with grass roadway ditches,
both sides. C&G or 7' (4' paved, 3' unpaved) shoulders with guardrail where applicable.
A 12' wide gravel access road for a sanitary sewer lift station at the beginning of the
project. A 25' gravel contruction access road for the now -developed site at the end of
the project and a small portion of W.E. Baab Industrial Road (24' paved roadway).
Annual Avg Daily Traffic (veh/hr/day):
Design/Future: >400 Year: 2018
Existing: N/A Year: N/A
General Project Narrative:
(Description of Minimization of Water
Quality Impacts)
R-5870 proposes to construct a new access road into the Alexander Industrial Park from W.E. Baab Industrial Road (current terminus at the existing cul-de-sac) to White Plains
Road (SR 1422). Approximately 1,100 linear feet of grass swales have been incorporated in roadside ditches, where possible, to reduce the velocity and promote the infiltration
of runoff. Riprap at pipe outlets, ditches, and streambanks has been incorporated to minimize erosion on slopes where vegetation will not be adequate. NCDOT standards for
ground cover, vegetation, and slope stabilization will be adhered to during the life of this project, and will be specified in the NCDOT Erosion and Sediment Control Plan for the
project.
Waterbody Information
Surface Water Body 1 : Trib. to Bull Branch
NCDWR Stream Index No.:
N/A
NCDWR Surface Water Classification for Water Body
Primary Classification:
None
Supplemental Classification:
None
Other Stream Classification:
None
Impairments:
None
Aquatic T&E Species?
No Comments:
NRTR Stream ID:
N/A
Buffer Rules in Effect: N/A
Project Includes Bridge Spanning Water Body?
INo
I Deck Drains Discharge Over Buffer? I N/A
Dissipator Pads Provided in Buffer? N/A
Deck Drains Discharge Over Water Body?
JNo
(If yes, provide justification in the General Project Narrative)
(If yes, describe in the General Project Narrative; if no, justify in the
General Project Narrative)
(If yes, provide justification in the General Project Narrative) I

Hi� hwa North Carolina Department of Transportation
gStormwater
Highway Stormwater Program
STORMWATER MANAGEMENT PLAN
(Version 2.08; Released April 2018) FOR NCDOT PROJECTS
WBS Element: 47917.1.1 TIP No.: R-5870 Count ies : Alexander Page 2 of 2
Swales
Sheet
No.
Station & Coordinates
(Road and Non Road
Projects)
Surface
Water
Body
Base
Width
ft
Front
Slope
H:1
Back
Slope
(H:1)
Drainage
Area
(ac)
Recommended
Treatm't Length
(ft
Actual
Length
ft
Longitudinal
Slope
%
Q2
cfs
V2
f s)
Q10
(cfs)
V10
(f s
Rock
Checks
Used
BMP
Associated w/
Buffer Rules?
4
-L- 13+50 LT
(1)Trib. to
Bull Branch
0.0
4.0
2.0
0.1
14
100
4.00%
0.2
1.6
0.4
2.1
No
No
-L- 14+50 LT
5
-L- 31+00 LT
(1)Trib. to
Bull Branch
0.0
4.0
2.0
0.1
10
50
3.63%
0.2
1.7
0.3
1.8
No
No
-L- 31+50 LT
5
-L- 31+50 LT
(1)Trib. to
Bull Branch
0.0
4.0
2.0
0.1
8
50
2.75%
0.2
1.4
0.2
1.5
No
No
-L- 32+00 LT
5
-L- 32+00 LT
(1)Trib. to
Bull Branch
0.0
4.0
2.0
0.0
4
50
2.12%
0.1
1.1
0.1
1.2
No
No
-L- 32+50 LT
4
-L- 13+50 RT
(1)Trib. to
Bull Branch
0.0
4.0
2.0
0.1
8
200
4.00%
0.1
1.5
0.1
1.6
No
No
-L- 15+50 RT
4
-L- 16+00 RT
(1)Trib. to
Bull Branch
0.0
4.0
2.0
0.1
12
50
2.23%
0.2
1.3
0.2
1.4
No
No
-L- 16+50 RT
4
-L- 16+50 RT
(1)Trib. to
Bull Branch
0.0
4.0
2.0
0.2
15
50
4.00%
0.2
1.7
0.3
1.9
No
No
-L- 17+00 RT
5
-L- 22+00 RT
(1)Trib. to
Bull Branch
0.0
4.0
2.0
0.7
67
100
1.55%
1.3
1.8
1.7
2.0
No
No
-L- 23+00 RT
5
-L- 23+00 RT
(1)Trib. to
Bull Branch
0.0
4.0
2.0
0.8
78
100
0.30%
1.5
1.1
1.7
2.0
No
No
-L- 24+00 RT
5
-L- 32+50 RT
(1)Trib. to
Bull Branch
0.0
4.0
2.0
0.4
40
200
1.44%
0.6
1.6
0.9
1.7
No
No
-L- 34+50 RT
5
-L- 34+50 RT
(1)Trib. to
Bull Branch
0.0
4.0
2.0
0.0
4
50
2.99%
0.2
1.5
0.2
1.6
No
No
-L- 35+00 RT
5
-L- 35+00 RT
(1)Trib. to
Bull Branch
0.0
4.0
2.0
0.2
24
100
1.12%
0.4
1.3
0.5
1.4
No
No
-L- 36+00 RT
Additional Comments
All back slopes on the project are 2:1, which do not explicitly fit swale design criteria, however, an average of the front and back slopes were taken to determine swale locations. This made the majority of the averaged slopes
3:1.