20171374 Ver 1_SW Plan_20171030

I Il�ll�c.l\ North Carollna Department of TransportEtfon '-
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STORMWATER MANAGEMENT PLAN _.._
Raknsatl Juno
Atltlress:l375 Silas Creek Parkway
winston Salem, NC 27727
General
Birch RidBe Dr.
�h, NC 27610
_--��+ ^-^•-�•-^•�•��-�sr� �asi nirunre: 1tu Year 2017 Existin : 210 Year: 2013
' Projed Narrative: WBS 178P.C.9.0 is ihe replacement o( 2@ 96" Cortugatetl Metal Pipes on SR 1696 (Du89ins Road) over Lynn B2nch. The existlng pipes are delenorating and Ihe headwal!
�tion of Minimization of Water are tailing to ihe poin[ of disrepaic A 61ow hole is present at lhe outlet of the existing slmcture. The proposed design calls ro replace lhe 2@ 9G' CMP with a single 15'-7" X ti
Impacts) 2" Cornigatetl Aluminum StmcNral Plale Pipe Amh with heatlwall antl entlwall. The proposed stmcture wiil be burietl 1' below the ezisting channel bed vnth t.5' silis. The i5'
sills will have a 6" low flow notch �o match the existing Iow flow wldth of the s�ream through the culvert. Interior baRles are also provitled to further promote low flaw contlilions
through lhe s�ructure, which will also have the 6" low flow notch provided. Bank stabilization is atltletl at the inlet and outlet ot the sWcture to stabilize lhe existing banks end
promate vegitation growlh along the banks. Class II np rap is placed at the toe of the oullel for the proposed structure to tlissipate enerBY at ihe existin8 biow hole. All neturel,
existing tlrainage pattems are meintainetl for the proposed roaUway. No dreina9e sVuctures are required.
Surtace Water C�assification Tor Water Botly
None
in the
yes.
yes,
in the Generel Pmject Narrallv
Gene21 Project Narrative)