20160955 Ver 1_justification to Corps_20161004

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7"ransportation
September 30, 2016
Andrew Williams
Regulatory Project Manager
US Army Corps of Engineers
3331 Heritage Trade Drive, Suite 105
Wake Forrest, NC 27587
PAT McCR4RY
Governor
NICH4LAS ,J. TENNYSON
Secretary
Subject: Bridge 371 in Randolph County, SR 2182 over Penwood Branch
Dear Mr. Williams:
Please let this serve as written justification as to why a culvert was chosen to replace the subject
deteriorated bridge. The location of the existing y-line (Ridgewood Circle) is too close to the
existing bridge to allow for the minimum length of a guardrail anchor unit to protect the parapet
wall of a new bridge. Ridgewood Circle practically ties to the I-line (SR 2182) at the existing
bridge. It is not in the best interest of the traveling public to have an inadequately protected
concrete obstruction in the clear zone of the roadway.
For your information, the guardrail anchor unit would need to be a minimum of 50 feet to meet
design standards. A proposed bridge would need to be approximately 90 feet in length to
satisfy construction and hydraulic design standards.
Thank you for your time and consideration in dealing with this matter. Please let me know if
you need additional information.
Sincerely,
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T.F. Welch, PE
Division 8 Bridge Program Manager
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cc: Art King, Division 8 Environmental Engineer
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State of North Carolina � Department of Transportation � Division 8
902 N. Sandhills Blvd. ( Aberdeen, N.C. 28315
910-944-2344 T