20171067 Ver 1_SW Plan_20170828

(Version 2.06; Released June 2016)
17BP.9.R.62 TIP No.:County(ies):Rowan Page 1 of 2
TIP Number:Date:
Phone:Phone:
Email:Email:
County(ies):
CAMA County?
No
Design/Future:Year:Existing:Year:
Aquatic T&E Species?Comments:
Yes N/A
No
Project Includes Bridge Spanning Water Body?Deck Drains Discharge Over Buffer?Dissipator Pads Provided in Buffer?N/A
Deck Drains Discharge Over Water Body?(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)
Annual Avg Daily Traffic (veh/hr/day):
Existing Site
Project Length (lin. miles or feet):
ac.
Surface Water Body (1):
Class CNCDWR Surface Water Classification for Water Body
ac.
NRTR Stream ID:
Approximately 20' wide clear roadway with approximately 10' lanes with average 3'
grassed shoulders and roadside ditches.
The crossing will remain in the current location and maintain the current roadway alignment. The proposed 2 @ 10' x 8' culvert system will employ variable height sills to
maintain low flow width and provide flow capacity for larger events . There will be 10' travel lanes with 4' paved shoulders and grassed shoulders with grassed and lined ditches.
Existing drainage patterns will be maintained.
N/A
260
2 @ 10' travel lanes, 4' paved shoulders (7' W/ GR). Proposed ditches will be utilized to
maintain existing drainage patterns as practicable.
Impairments:
9/7/2016
W. Galen Cail, P.E.
RALEIGH, N.C. 27610
SEPI ENGINEERING AND CONSTRUCTION CO. INC.
2011
NCDWR Stream Index No.:
Waterbody Information
919-707-6711
Other Stream Classification:
Primary Classification:
Project Built-Upon Area (ac.)
General Project Narrative:
(Description of Minimization of Water
Quality Impacts)
Supplemental Classification:
Little Creek 12-110-3
0.1
North Carolina Department of Transportation
Highway Stormwater Program
STORMWATER MANAGEMENT PLAN
FOR NCDOT PROJECTS
Project Type:
WBS Element:
Bridge ReplacementWBS Element:17BP.9.R.62
River Basin(s):
NCDOT Contact:
General Project Information
[e-mail]
Address:
Contractor / Designer:
919-789-9977
CHINA GROVE
MOSTLY RURAL W/ SOME DEVELOPMENT
RALEIGH, N.C. 27605
[e-mail]
Rowan
Address:1025 WADE AVE.1020 BIRCH RIDGE DR.
Yadkin-Pee Dee
City/Town:
0.2
Typical Cross Section Description:
Surrounding Land Use:
No
0.049 MI.
Project Description
Proposed Project
(If yes, provide justification in the General Project Narrative)
Buffer Rules in Effect:N/A
None
Wetlands within Project Limits?
(Version 2.06; Released June 2016)
17BP.9.R.62 TIP No.:County(ies):Rowan Page 2 of 2
Sheet No.:4 Station:14+26.3
Barrel Height (ft):
Culvert Length (ft)
%
%
North Carolina Department of Transportation
Highway Stormwater Program
STORMWATER MANAGEMENT PLAN
FOR NCDOT PROJECTS
WBS Element:
Bridge to Culvert Avoidance and Minimization
Proposed Structure Summary
Sheet No. & Station
Drainage Area (ac or sq mi):1.52 SQ MI.
Number of Barrels:2
Barrel Width/Diameter (ft):10
Surface Water Body:(1)Little Creek
46.5Culvert Type:RCBC
8
Avoidance and Minimization Efforts:
(Bridge to Culvert)
Minimal Change to existing footprint and profile / 2:1 fill slopes used / Minimal channel improvements required to tie back to existing
Stream Slope Fish and/or Aquatic Life Passage
Existing Average Stream Slope (%):0.64 Existing Low Flow Channel Dimensions
in the Stream:
9'-11' FT Base - Low Flow Chanel (+/-)
Proposed Culvert Slope (%):0.64
Culvert Burial
Proposed Culvert Burial Depth (ft):1 FT (LT Barrel) / 1.5 FT (RT Barrel)
Existing Streambed Material:SAND, SMALL TO MEDIUM ROCKS, SMALL
BOULDERS
Proposed Low Flow Dimensions
Through the Culvert:
10 FT Low Flow Barrel Width
Proposed Sills/Baffles:1 FT Sill LT / 1.5 FT Sill RT Barrel (Both Sides)
Existing Low Flow Velocities in the
Stream (ft/s):3.3 fps (2-yr)
Proposed Low Flow Velocities Through
the Culvert (ft/s):2.2 fps (2-yr)
Alternating Low Flow Sills/Baffles:Sills provided as described to the left - no
baffles proposed (no meandering low flow
channel to retain)
Culvert/Stream Alignment
Stream Patterns Upstream and Downstream
of the Culvert that Could Affect Fish
Passage and Bank Stability:
Relatively straight alignment in vicinity of culvert / Banks relatively stable
Bed Forms Impacted by Culvert (riffles,
pools, glides, etc.):
Bed forms are not well defined near the existing bridge.
Low Flow Floodplain Bench Required?
(provide justification)
Yes
Bank Stabilization:Minor Channel improvements required - see Culvert Survey Report in Plan View
Natural Stream Channel 2-yr Velocity (ft/s):2.9
Outlet Velocities
Sharp Bends at Inlet/Outlet?
(describe culvert alignment with stream)
No
Stream Realignment Necessary? (provide
justification)
No
Evaluate/Describe Roadway Geometric Constraints:
Proposed roadway geometry generally matches existing - Bridge replacement is primary reason for project.
Proposed Culvert 2-yr Outlet Velocity (ft/s):2.19
Natural Stream Channel 10-yr Velocity (ft/s):5.6
Proposed Culvert 10-yr Outlet Velocity (ft/s):3.94
Roadway Geometric Considerations