20180613 Ver 1_Stormwater Report_20180503

High��3y North Carolina Department of Transportation j��� �
Storn'1wc'jtC��. Highway Stormwater Program
STORMWATER MANAGEMENT PLAN �—�
(Version 1.2; Releasetl September2011) FOR LINEAR ROADWAV PROJECTS
Pro ectlTlP No.: 17.BP.1S.R.86 Count (ies): Cherokee Pa e 1 of 1
General Project Information
Pro'ect No.: 17.BP.74.R.86 Pro"ect T pe: Brid e Replacement Date: 9/12/2014
NCDOT Contact: Andrew T. Nottin ham, RE Contractor / Desi ner: WSP I Ana M. Passman, P.E.
Address: NCDOT Hydraulics Unit Address: 15407 Weston Parkway
1020 Birch Ridge Road Suite 700
Ralei h, NC 27610 Ralei h, NC 27513
Phone: [phone] Phone: [phone]
Email: anottin ham ncdot, ov Email: ana.passman wsp roup.com
Cit /Town: Murph Count (ies): Cherokee
River Basin s): Hiwassee CAMA County? No
Prima Receivin Water: West Pron Grape Creek NCDWQ Stream Index No.: 1-60-�
NCDWQ Surtace Water Classification for Primary Receiving Water Prima : Class C
Supplemental: None
Other Stream Classification: None
303(d) Impairments: None
Buffer Rules in Effect Other
Pro ect Descri tion
Pro'ect Len th (lin. Miles or feet): 0.06 miles Surroundin Land Use: Rural residentail wfth woods and grass
Pro osed Pro ect Euistin Site
Pro'ect Built-Upon Area (ac.) 0.16 ac. 0.13 ac.
Typical Cross Section Description: 10' Lanes with 3' Grassed Shoulders 8' to 9' Lanes with Grassed Shoulders
Average Daily Traffic (veh/hr/day): Desi n/Future: 570 (vehlda ) Existin : 570 (vehlda )
General Project Narrative: The project consists of replacement of Bridge'190226 singie span 16'-6" tember floor on timber joists on SR 1350 (Grape Creek Road) over West Prong Grepe Creek and
associated roadway work. The proposed structure with be a 19' x 6'-1" Aluminum Box Culvert with sills and baffles at existing location. The project will increase impervious
area by 0.03 ac. The increased flow from impervious surfaces will be directed through grassed shoulders and channeis. This provides sufficient fltration in accordance with
the NCDOT Aitemative Design Criteria.
References