20190786 Ver 1_SF830167_HYD_SMPv2.07_20180329(Oct 2016)_20190614

(Version 2.07; Released October 2016)
North Carolina Department of Transportation
Highway Stormwater Program =�
STORMWATER MANAGEMENT PLAN
FOR NCDOT PROJECTS
WBS Element: 17BP.10.R.157 TIP No.: SF-830167 County(ies): Stanly Page 1 of 1
General Project Information
WBS Element:
17BP.10.R.157 ITIP Number: SF-830167 Project Type: Bridge Replacement Date: 3/29/2018
NCDOT Contact:
Marc Shown
Contractor / Desi ner:
STV En iners Inc. / Shirshant Sharma
Address:
1020 Birch Ridge Drive
Raleight, NC 27610
Address:
900 West Trade Street, Ste. 715
Charlotte, NC 28202
Phone:
919 707-6751
Phone:
704 816-2556
Email:
mshown(@ncdot.gov
Email:
[e-mail]
City/Town:
Albemarle
Count ies :
Stanl
River Basin(s):
Yadkin -Pee Dee
ICAMA County?
I No
Wetlands within Project Limits?
No
Project Description
Project Length (lin. miles or feet):
0.07 Surrounding Land Use: JRural, wooded, agricultural
ANIM Proposed Project
Existing Site
Project Built -Upon Area ac.
0.3 ac.
0.2 ac.
Typical Cross Section Description:
Bridge : Two I V lanes, 2'-11" paved shoulders
Approach: Two 10' lanes, 2'-11" paved shoulders
Bridge: Two 10' lanes, no shoulders
Approach: Two 10' lanes, grass shoulders
Annual Avg Daily Traffic (veh/hr/day):
Design/Future: 4200 Year: 2025
Existing: 2100 Year: 2013
General Project Narrative:
(Description of Minimization of Water
Quality Impacts)
The existing single span 30'-7" bridge over Town Creek on SR 1421 (Bethany Rd) is being replaced with a single span (1 @70') 24" cored slab bridge. The bridge will be normal
crown at 2.0% with 11' travel lanes and 2'-11" shoulders, 27"-10" clear width and 30'-0" OTO width. The existing bridge structure will be removed. Overall drainage patterns will
be maintained. There are roadside ditches that flow towards the bridge on either side of the structure. The proposed design will interfere with three of the existing ditches flow
patterns, and proposed ditches will be used to maintain flow to the bridge, and down the floodbench. On the begin side of the bridge, traffic bearing 2GI drainage inlets were
placed on both sides of the roadway to pick up runoff from the bridge. Class -II rip rap abutment protection on both banks of the stream is also proposed to prevent future erosion
and stream migration. Deck drains were placed on both sides of stream; discharging onto the rip rap abutment. Deck drains are needed to prevent stormwater spread from
entering the roadway. No dissipator pads were used because the Class-ll rip rap will prevent erosion and dissipate flow. Dual proposed water line crossing construction will also
be performed as part of this project which will cross the stream upstream of the proposed bridge. The work area shall be cordoned off with impervious dikes and pump around
operation and the sediment laden water within the work area shall be filtered out using a special stilling basin.
Waterbody Information
Surface Water Body 1 : Town Creek
NCDWR Stream Index No.:
13-17-31-1-1
NCDWR Surface Water Classification for Water Body
Primary Classification:
Class C
Supplemental Classification:
None
Other Stream Classification:
None
Impairments:
None
Aquatic T&E Species?
No Comments:
NRTR Stream ID:
Buffer Rules in Effect: N/A
Project Includes Bridge Spanning Water Body?
iYes
I Deck Drains Discharge Over Buffer? iYes
Dissipator Pads Provided in Buffer? INo
Deck Drains Discharge Over Water Body?
IN2
(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)