20080619 Ver 2_Other Agency Comments_20080801

1

STATE
K ti

STATE OF NORTH CAROLINA lacy

DEPARTMENT OF TRANSPORTATION
MICHAEL F. EASLEY LYNDO TIPPETT
GOVERNOR SECRETARY
July 29, 2008

Mr. David Baker, NCDOT Regulatory Project Manager
US Army Corps of Engineers
151 Patton Avenue, Room 208
Asheville, NC 28801-5006

Subject: 401 Permit Application Revision/Modification
Action ID No. SAW-2008-1212
DWQ Project No. 080619
SR 1793 - Tracy Grove Road - Henderson County
State Project No. 14C.045120 (DWQ Minor Permit Fee $240.00)

Dear Mr. Baker:

The North Carolina Department of Transportation (NCDOT) proposes to widen, grade,
drain and pave SR 1793 in Henderson County. The original permit applications dated
March 31, 2008, included four permitted sites with pipe extensions totaling 25 linear
feet of permanent impacts on perennial and intermittent streams. Due to a grade
change at Site #4, Station 130+86, the original length was inadequate. NCDOT
proposes to install an additional 15 linear feet of 42-inch CMP to gain sufficient length
for the stabilization of the fill slope at the intersection. This fill slope is critical in
obtaining sufficient shoulder widths for the installation of guardrail.

I have enclosed a revised PCN application (impact table), topographical map and cross-
sectional drawing for the culvert installation (Site 4). The new culvert will remain
perched, as is the existing culvert.

Impacts to Waters of the United States

In order to construct the project in accordance with our current secondary road
standards, it will be necessary to impact waters of the United States in the French
Broad River Basin. Specifically, NCDOT is requesting to add 15 linear feet of culvert in
an unnamed tributary to Devil's Fork Creek (DWQ Class: C). Listed below is a revised
summary of the proposed impacts.

Stream Impact Perennial or Avg. Stream Impact Area of
Number Stream Name Type of Impact Intermittent? Width Before Length Impact
(indicate on ma) Impact (linear feet) (acres)
Site 1, UT to Devil's Culvert Intermittent 1' 5' 0.00011
Sta 78+12 Fork Creek
Site 1A, UT to Devil's Impervious Dike Intermittent 5' (Dike) 3' 0.00034
Sta 78+12 Fork Creek
Site 1A, UT to Devil's Flow Diversion Intermittent 1' 30' 0.00069
Sta 78+12 Fork Creek
Site 2, UT to Devil's Culvert Perennial 2' 10' 0.00046
Sta 83+93 Fork Creek

Site 2A, UT to Devil's Impervious Dike Perennial 5' (Dike) 10' 0.00115
Sta 83+93 Fork Creek
Site 2A, UT to Devil's Flow Diversion Perennial 2' 60' 0.00275
Sta 83+93 Fork Creek
Site 3, UT to Devil's Culvert Intermittent 1' 0' 0.00000
Sta 117+00 Fork Creek
Site 3A, UT to Devil's Impervious Dike Intermittent 3' 5' 0.00034
Sta 117+00 Fork Creek (Dike)

Site 3A, UT to Devil's Flow Diversion Intermittent 1' 200' 0.00459
Sta 117+00 Fork Creek
Site 36, UT to Devil's
Sta 115+12 to Fork Creek Piped Ditch Intermittent 1' 0' 0.00000
Sta 117+00
*Note for Site 3: The intermittent flow from the outfall of the pond will be diverted through an existing grass lined
ditch to the pipe at Sta. 115+11. The outfall for the pipe at Sta. 115+11 is at the outfall to the piped ditch. This
will minimize the impact to the exposed channel as it presently exists. While the flow is diverted, the pipe in the
existing piped ditch will be excavated and replaced.
Site 4, UT to Devil's Culvert Intermittent 1' 25' 0.00023
Sta 130+86 Fork Creek
Site 4A, UT to Devil's Impervious Dike Intermittent 4' 5' 0.00046
Sta 130+86 Fork Creek
Site 4A, UT to Devil's Flow Diversion Intermittent 1' 35' 0.00080
Sta 130+86 Fork Creek
**Note for Site 4: The existing pipe will remain in place. There will be an extension of 25' at the inlet. A
headwall may be installed on the inlet end of the pipe, if required, due to the convergence of the fill slopes at the
intersection.
Total Perennial Stream Impact (by length and acreage) 10' 0.00046
Total Intermittent Stream Impact 30' 0.00067
Temporary Impacts Flow Diversion and Impervious Dike Respectively 325' 0.00229

Total Permanent Perennial Impact 10 linear feet
Total Permanent Intermittent Impact 30 linear feet
Total Temporary Impacts 325 linear feet

Permits Requested

Also by copy of this letter, I am requesting authorization to proceed under Section 401
of the Clean Water Act from the Division of Water Quality. In addition, I am asking Mr.
McHenry and Mr. Ed Ingle, Roadside Environmental Field Operations Engineer, to
comment directly to me concerning this permit request.

Your earliest consideration for this request would be greatly appreciated. If you have
any questions or need additional information, please contact Mr. Josh Lanning or me at
[phone].

Sincerely,
Per-

Mark T. Gibbs, P.E.
District Engineer

Enclosures

cc: Mr. Brian Wrenn, DWQ, DENR, Raleigh (four copies)
Mr. Troy Wilson, Biologist, U.S. Fish and Wildlife Service
Mr. Mike Parker, DWQ, DENR, Asheville
Mr. David McHenry, Mountain Region Coordinator, NCWRC, Waynesville
Mr. Joel B. Setzer, P.E., Division Engineer, NCDOT
Mr. Mark Davis, Division Environmental Officer, NCDOT
Mr. Ed Ingle, Roadside Environmental Field Operations Engineer, NCDOT
Mr. Steve Cannon, P.E., Henderson County Maintenance Engineer, NCDOT
File

Site # 4 Sta. 130+86 Coordinates 35.31472° N / 82.40750° W
Proj # 14C.045120
SR 1793, Tracy Grove Road
Henderson County

Existing & Prop. Center Line

Oulet Invert Elev. Inlet Invert Elev.
988.8 990.3
2 1

Replace Existing 70', 42" CMP with 95', 42" CMP
"NOTE: A headwall will be installed on the inlet of the pipe, if needed, to stabilize
the fill slope due to the close proximity to the intersection of SR 1793 and SR 1790.

Thalwegs Approximately 20' from shoulder of existing road
1 991.0
2 987.0

JCC jAdi IJ IUI CI UJIUI I UUI Ili UI LJI dVVII IY I IUL LU bUdIC

Henderson County Topographic Map
SR 1793, Tracy Grove Road

q_l
x~
. ~~r i E.. ~>±.w+. I ~~^':.A *~y<~ •a,.i~FLJR V A ~ ~ ~ ~ ? t
k .
'~4:: ; - -w. •-CS,. ~f , ~t v 4 ? • ".R~tr..._ '9s+a~.. ~h` ^Q.~ ~R t T,,.-
[ er
zz ~
t y ~ -
w
,

x

p ~i rte- • M r ~ `~X'w e. . ".£...1
1 1+l
s'~ , ~ . • _ ~4 fem.
r:.
y r ~ ~

Site 4