U-4438 (3)

Wainwright, David
From Willis Thomas C
Sent Monday October 31 2011 3 51 PM
To Wainwright David Ward Garcy
Cc Blankenship Andrew Midgett Randy
Subject U 4438 Elizabeth City Permit Question
Attachments Site1 &2 pdf
David and Garcy,
We had an on site meeting this morning with the contractor about permit Site 1 & Site 2
During some brainstorming over how to rebuild the impacted channels in a dry work area, the
question came up about using sheet pile and a pumping operation versus a diversion channel
Sheet pile would be placed at the head of site 1 with a by pass pump carrying the base water
flow around the site A couple of the sheet pile pieces would be lowered in the middle to
allow storm event high water flow to pass through the channel This would act like a weir to
help handle storm event water that could not be handled by the pumping operation The pumping
operation would be designed to handle base flow and normal rain fall events, but could not
accommodate a heavy rain event Under this scenario, it is anticipated that the channel
reconstruction could be completed in three to four weeks, with seeded and matted stream
banks
My question to you is, would this require a permit modification and would this option be
considered, as long as DOT made a good effort to complete the work quickly, insuring seeded
and matted banks within that 3 4 week time period
The work area is a little cramped and the diversion channel will likely result in more time
with disturbed soil banks exposed around the site We are trying to find the quickest way to
get the channel restored with the least amount of opportunity for erosion to occur
Feel free to give me a call if you have any questions or need further explanation I have
attached a permit drawing of site 1 & site 2
Thanks,
Clay Willis
NCDOT Division One
Environmental Supervisor
252 339 -0112
tcwillis(@ncdot gov
s
Email correspondence to and from this sender is subject to the N C Public Records Law and
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NCDENR - Maps
NC Department of Environment and Natural Resources
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