20161083 Ver 1_SMP v2.01_400254_17BP.7.R.87 Oct 19 2016_20161103

I llg;lltt'�11' North Carolina Department of Transportation
5[lll'it311 rli["I' HighwayStormwater Program
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STORMWATER MANAGEMENT PLAN °`�-::�„�`
(Version 2.01; Released December 2014) FOR NCDOT PROJECTS
WBS Element: 17BP.7.R.87 TIP No.: 17BP.7.R.87 County(ies): Guilford Page 1 of 1
General Project Information
WBS Element: 176P.7.R.87 TIP Number: 176P.7.R.87 Project Type: Bridge Replacement Date: 5/12/2015
NCDOT Contact: W.G. Cail, P.E. Contractor / Designer: Dan Duffield, P.E.
Address: NCDOT Hydraulics Unit Address: Summit Design and Engineering Services
1020 Birch Ridge Drive 100 East Six Forks Road, Suite 300
Raleigh, NC 27609
Phone: [phone] Phone: [phone]
Email: [e-mail] Email: [e-mail]
CitylTown: Kimesville County(ies): Guilford
River Basin(s): Cape Fear CAMA County? No
Wetlands within Project Limits? No
Project Description
Project Length (lin. miles or feet): 325 lin. Feet Surrounding Land Use: Maintained roadway, Residential, Agriculture
Proposed Project Existing Site
Project Built-Upon Area (ac.) 0.15 ac. 0.14 ac.
Typical Cross Section Description: 2 lane road with 10' travel lanes, and 4' grassed shoulder. No guardrail is associated 2 lane road with 9.5' travel lanes and no paved shoulder.
with this project due to close proximity of driveways located at the culvert and to allow for
sight distance for entering and exiting these driveways safely. In lieu of guardrail the
culvert was extended for safer fill slopes.
Annual Avg Daily Traffic (veh/hr/day): Design/Future: Year: Existing: 500 Year:
General Project Narrative: The project consists of replacing Bridge 400254 on SR 3121 (Ferguson Rd) over Upper Tributary to South Prong Stinking Quarter Creek. The existing structure is a 35'x24.75'
(Description of Minimization of Water timber deck on timberjoists with a su�ciency rating of 26.82. The proposed structure is a 2@ 10'X7' reinforced concrete box culvert. The culvert has been sized as to have one
Quality Impacts) barrel match the existing channel to the greatest extent possible and is burried 1.0' below the existing bed and back filled with native stream material. The other barrel will have
a sill and will only allow for high flow. Runoff will be conveyed through a 15" RCP in the northwest quadrant, this is to not disturb the rock wall adjacent to the project. A ditch in
the south west quadrant transitions from an existing V ditch to a proposed rip rap lined base ditch with a Q2 velocity of 3.9 fUsec, rip rap was added to stabilize the ditch. In the
south east quadrant an existing V ditch passes thru a 15" drive pipe and continues to the outlet end of the culvert across some culvert outlet protection, the velocity of this ditch
has a Q2 velocity of 4.0 ft/sec. across the rip rap protection. Runoff will be conveyed through a 15" RCP in the northwest quadrant, this is to not disturb the rock wall adjactent to
the project. A ditch in the south west quadrant transitions from an existing V ditch to a propsoed rip rap lined base ditch with a Q2 velocity of 3.9 ft/sec, rip rap was added to
stablize the ditch. In the south east quadrant an existing V ditch passes thru a 15" drive pipe and continues to the outlet end of the culvert across some culvert outlet protection,
the velocity of this ditch has a Q2 velocity of 4.0 ft/sec. across the rip rap protection. Construction will proceed as follows: Traffic will be detoured off-site. Erosion and
sedimentation control measures will be installed. Water will be diverted around the construction area. The old bridge will be removed. The proposed structure will be replaced
on its existing alignment. The channel will be excavated and realigned for low flow shaping. Water will be gravity flow 24" piped around the work area during construction by
installed impervious dikes upstream and downstream of the existing bridge. Special stilling basins will be utilized on an as needed basis to pump effluent trapped between the
impervious dikes if a storm even overtops the dikes. Equipment to be used includes a track hoe, dump truck, paving equipment, pumps, various hand tools, possibly a crane to
move construction material such as reinforced bars of steel, and concrete buckets to place conrete.
Waterbody Information
Surface Water Body (1): Upper Tributary to South Prong Stinking Quarter Creek Tributary NCDWR Stream Index No.: 16-19-8-2-(2)
NCDWR Surface Water Classification for Water Body Primary Classification: Water Supply V(WS-V)
Supplemental Classification: Nutrient Sensitive Waters (NSW)
Other Stream Classification: None
Impairments: None
Threatened/Endangered Species? Comments:
NRTR Stream ID: Buffer Rules in Effect: Jordan Lake
Project Includes Bridge Spanning Water Body? Yes Deck Drains Discharge Over Buffer? No Dissipator Pads Provided in Buffer? N/A
Deck Drains Discharge Over Water Body? No (If yes, provide justification in the General Project Narrative) (If yes, describe in the General Project Narrative; if no, justify in the
(If yes, provide justification in the General Project Narrative) General Project Narrative)