20191173 Ver 1_SF830192_HYD_SMPv2.07_20190131_20190904

Highway North Carolina Department of Transportation
Stormwater Highway Stormwater Program �=�°
STORMWATER MANAGEMENT PLAN
Version 2.08; Released April 2018 FOR NCDOT PROJECTS
WBS Element: 17BP.10.R.120 TIP No.: SF-830192 County(ies): Stanly Page 1 of 1
General Project Information
WBS Element:
17BP.10.R.120 TIP Number: SF-830192 Project Type: Bridge Replacement Date: 1/31/2019
NCDOT Contact:
Marc Shown
Contractor / Designer:
STV Engineers Inc. / Shirshant Sharma
Address:
1020 Birch Ridge Drive
Raleigh, NC 27610
Address:
900 West Trade Street, Ste. 715
Charlotte, NC 28202
Phone:
[phone]
Phone:
[phone]
Email:
[e-mail]
Email:
[e-mail]
City/Town:
Albemarle
County(ies):
Stanly
River Basin(s):
Yadkin -Pee Dee r
CAMA County?
No
Wetlands within Project Limits?
Yes
Project Description
Project Length (lin. miles or feet):
0.20 Surrounding Land Use: Wooded
Proposed Project
Existing Site
Project Built -Upon Area (ac.)
0.54 ac.
0.46 ac.
Typical Cross Section Description:
Bridge : Two 10' lanes, 3'-11" paved shoulders
Approach: Two 10' lanes, variable paved shoulders
Bridge: Two 7' lanes, without shoulders
Approach: Two 9' lanes, 4' unpaved shoulders
Annual Avg Daily Traffic (veh/hr/day):
Design/Future: 560 Year: 2025
Existing: 310 Year: 2015
General Project Narrative:
(Description of Minimization of Water
Quality Impacts)
The existing 58' double span bridge over Big Bear Creek on SR 1238 (Flint Ridge Rd.) is being replaced with a 90' single -span bridge with a span arrangement of 1@90' (33"
box beam). The bridge will have vertical abutments with the cutoff of existing abutments at 442.5 ft. The bridge will have normal crown at 2% with 10' travel lanes and 3'-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 both sides of the structure. The proposed design will interfere with one of the existing ditches flow patterns. Proposed ditches will be used to
maintain flow to the bridge. On the begin side of the bridge, two traffic bearing grated drop inlets with double frame and grates (2GI) were placed on the right side and left side of
the roadway in the shoulder berm gutter to pick up runoff from the bridge. Class -II rip rap abutment protection around both abutments is also proposed to prevent future erosion
and stream migration. Deck drains are not needed. No dissipator pads were used because the Class -II rip rap will prevent erosion and dissipate flow. Impervious dikes will be
used around existing abutments to prevent the sediment from entering the stream during the removal of existing bridge and will be dewatered as needed.
Waterbody Information
Surface Water Body (1): Big Bear Creek
NCDWR Stream Index No.:
13-17-31-5
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? INo
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 es, provide justification in the General Project Narrative