19970616 Ver 3_Information Letter_20050624

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STATE OF NORTH CAROLINA
DEPARTMENT OF TRANSPORTATION
MICHAEL F EASLEY
GOVERNOR
February 24, 2005
Mr John Hennessy
NCDWQ Wetlands Unit
2321 Crabtree Blvd
Suite 250
Raleigh NC 27604 2260
ATTN MS Nicole Thomson
NCDOT Coordinator
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LYNDO NETT
SECRETARY
RECEIVED
N C Deot of ENR
MAY 24M5
Wins on Salem
Regional Of ice
SUBJECT Watauga County US 421 new location from South Fork New River in Boone to
the Blue Ridge Parkway in Deep Gap Federal Aid Project No FR -86 1(6), State
Project No 8 1750601 TIP No R 529BA USACE Action ID No 199707161
DWQ project No 970616
Please find enclosed one copy of the proposed reconstruction plans for a previously
relocated unnamed tributary The stream in question is part of the original US 421 relocation in
Watauga County TIP R 0529 The stream was designated as site 4 in the original permit
application As part of the US 421 project the stream was relocated into a step pool channel and
was considered on site mitigation at 1 1 Since the completion of the project the hillside
adjacent to the relocated channel experienced a failure and sloughed off into the relocated
channel The NCDOT is proposing to repair the slope failure and shift the stream away from the
failed slope to hedge against any future slope failures The stream design will remain essentially
unchanged other than the shift The shift will involve approximately 587 linear feet of stream
channel
Please note that a temporary diversion pipe will be placed in the location of the new
stream channel during the slide repair The stream will flow through this pipe during the slide
repair The use of the pipe will allow a wider work area during the slide repair as opposed to
being c,onstramed by an adjacent open channel Once the slide repair is complete the pipe will
be removed in sections and a pump around system will bE used so that the new stream channel
Ic,atures can be constructed in the dry
MAILING ADDRESS
NC DEPARTMENT OF TRANSPORTATION
PROJECT DEVELOPMENT AND ENVIRONMENTAL ANALYSIS
1548 MAIL SERVICE CENTER
,RALEIGH NC 27699 1548
TELEPHONE [phone]
FAX [phone]
WEBSITE WWW NCDOT ORG
LOCATION
TRANSPORTATION BUILDING
1 SOUTH WILMINGTON STREET
RALEIGH NC

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