20070979 Ver 1_Information Letter_20100930

Ridings, Rob
Fiom: Montague, Heather W
Sint: Thursday, September 30, 2010 3:32 PM
Tip: Ridings, Rob; Alsmeyer, Eric C SAW
Cc: Murray, Christopher A, Rierson, Dawn; Pearson, Donald R; Harris, Michael A; Evans, Jennifer
A
Sijbject: WBS No. 39878; pipe replacement project on SR 1004 (Old Oxford Road) in Granville County
Aitachments: SR 1004 pipe replacement detail.pdf; inlet.jpg; outlet.jpg
Rid: NCDOT Permit Application dated May 29,2007 for TIP No. R-4905
USACE Action ID No. 2007-1020 (Permit not issued)
NCDENR-DWQ Project No. 20070979 dated June 11, 2007
Rob and Eric-

N(.-DOT Division 5 applied for a permit to construct this project through an application dated
May 29, 2007. The proposed TIP project involved buffer and stream impacts associated with
road improvements to SR 1004 (Old Oxford Road). The project proposed minor widening for
adding turn lanes for the new driveway entrance to CertainTeed Corporation (a driveway which
was built by Granville County Maintenance in the Summer of 2007). The permit application ,.
noted the existing structures conveying Fishing Creek were 3@38"x24" pipes [recently
determined to actually be 3@30" pipes] that are 50ft long (see attached pictures)'. The permit
application also :noted.that- the replacement structures would be 3@43"x26" pipes :,thatt_are_.50ft;c;r. :.,
ling. Permanent-impacts at the site associated with the pipe replacement total no new pipe;..::
length. However, rip-rap-.armoring along the stream banks and within theflow,line.•totaling
24LF (10LF at :the inlet an& 14,LF at the outlet of the pipes) was proposed and permitted dissipate the energy out of the pipes where a severe scour hole has developed and.to prevent.
additional undercutting of the road embankment on the inlet. The installation of a=new dry.._.,,,
dross line was 'proposed approximately 150ft south of the old triple line,, which:,would;also.-
required associated ditch work:and extra'buffer impacts'to carry watery clown.-to the creek-:
crossing. However, TIP NO:'.R-4905: has not been placed under contract and.,•timing for;.-turn lane ::•::.
construction and roadway 'improvements are uncertain. Therefore there will be no, widening, -
improvements, no new dry line pipe installation, and no ditch alterations at-this.time.;
However as apart of routine maintenance SR 1004 is up for resurfacing: Ahead of;the
resurfacing project, Granville County Maintenance would like to replace the triple line.
crossing under state funding WBS No. 39878.
Without the road work, the scope of this project is significantly reduced and being-3.years
later than originally presented, a new review by Randy Boyd with Hydraulics was warranted..
Based on the recommendation from the Hydraulics Unit, Maintenance now plans to install 2@57"
x 38" corrugated aluminum pipe arches that are 50ft long with pre-built aluminum headwalls to
be welded on to both ends of the pipes. The footprint of the pipe replacement with headwalls
w;Lll not exceed the footprint originally permitted to include 24LF of surface water impacts,
as needed for stabilization. The use of headwalls may minimize the amount of rip rap armoring
needed along the fill slope, stream banks, and within the flow line.
Attached for your records is a pipe replacement detail to be performed under the referenced
authorizations. This drawing is a larger scale drawing highlighting impacts presented in the
original permit drawing. It also depicts the use of headwalls and a double line of new pipes
Office this work is complete, I plan to submit the certificate of completion attached to this
same drawing with a note that all other aspects approved under authorization 20070979.and
non-reporting nwp 14 were not built yet. Should roadway improvements and turn lanes
construction eventually take place here, new/revised roadway plans will be drawn and the
permits would be re-evaluated at that time. If you have any questions or need additional
information please contact me.
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