20090266 Ver 1_USACE Correspondence_20100322

o - 0 2?.P LP
LAS
,
IN REPLY REFER TO
Regulatory Division
DEPARTMENT OF THE ARMY
WILMINGTON DISTRICT, CORPS OF ENGINEERS
Washington Regulatory Field Office
Post Office Box 1000
Washington, North Carolina 27889-1000
March 17, 2010
I ROW [A ?
MAR 2 2 2010
DENR - WAVR Qugm
WE IJV= ANDS ATER IRANCN
ORM ID SAW-2008-02444 / Greenville Utilities Raw Water Pumping Station Project
Mr. Ricky Langley
Greenville Utilities
Post Office Box 1847
Greenville, North Carolina 27835-1847
Dear Mr. Langley:
This correspondence confirms my receipt of the March 11, 2010, plans submitted on your
behalf by Ms. Shearin Dramby, Brown and Caldwell, regarding the Greenville Utilities Raw
Water Pumping Station Improvement project located off Old River Road, within the Tar River,
in Greenville, Pitt County, North Carolina. This letter also confirms our March 10, 2010, onsite
meeting. Also in attendance was Mr. Josh Pelletier of my staff.
For the purposes of the U.S. Army Corps of Engineers (Corps) Regulatory Program, the Code
of Federal Regulations (CFR) published in the Federal Register on March 12, 2007, lists
nationwide permits.. Authorization, pursuant to Section 10 of the Rivers and Harbors Act and
Section 404 of the Clean Water Act, was provided under Nationwide Permit 12 for work within
waters of the United States associated with utility line activities.
By copy of this correspondence, you are hereby notified that this additional work is authorized
by Nationwide Permit 12 provided it is accomplished in strict accordance with the enclosed plans
and the following special conditions. It is also understood that all conditions of the original
authorization remain applicable and that the expiration date is unchanged. Please be advised that
this correspondence does not relieve you of the responsibility to obtain any other required State
or local approval.
Special Conditions
a. Within 14 days of completion of the placement of the rock, the Permittee shall submit
an As-Built survey of the final project contours to Mr. Josh Pelletier of the Washington
Regulatory Field Office, Post Office Box 1000, Washington, North Carolina 27889.
b. The Permittee shall contact Mr. Pelletier of the Washington Regulatory Field Office,
telephone [phone], at least two (2) weeks prior to implementing the final planting plan to
schedule an inspection of the project area.
c. No work authorized by this correspondence may commence until the Permittee has
received written concurrence from the North Carolina Wildlife Resources Commission regarding
the fish moratorium.
Thank you for your time and cooperation. The Wilmington District is committed to providing
the highest level of support to the public. To help us ensure we continue to do so, please
complete the Customer Satisfaction Survey located at our website at
http://re ug latory.usacesurveco. If you have any questions, please contact Mr. Pelletier at the
Washington Regulatory Field Office, telephone [phone].
Sincerely,

David M. Lekson, P.W.S.
Chief, Washington Regulatory Field Office
Enclosures
Copies furnished (with enclosures):
Mr. Ian McMillan, PWS
NCDENR/Division of Water Quality
2321 Crabtree Blvd Suite 250
Raleigh, NC 27604
Ms. Maria Tripp
North Carolina Wildlife Resources Commission
943 Washington Square Mall
Washington, North Carolina 27889
2

t
5410 Trinity Road
Palisades 11, Suite 320
Raleigh, NC 27607
Tel: [phone]
Fax: [phone]
March 11, 2010
D
Mr. Josh Pelletier
Washington Regulatory Field Office
US Army Corps of Engineers
2407 West Fifth Street
Washington, North Carolina 27889 138582-214
Subject: GUC Raw Water Intake Project
Notice of Stabilization Work - Section 404 Permit No. 2009-00541
Dear Mr. Pelletier:
This letter serves as a follow-up to our onsite meeting today with representatives from
Greenville Utilities Commission (GUC), Crowder Construction, Brown and Caldwell, and
the U.S. Army Corps of Engineers (PSACE) for immediate stabilization measures required
to protect the current GUC Raw Water Intake Project. During our meeting, we discussed
the immediate need to stabilize a large scour hole that has developed around the cofferdam
to protect the structural integrity of the cofferdam and ultimately the structural integrity of
the new raw water intakes once the cofferdam is removed.
The proposed stabilization measure is required in an effort to:
¦ prevent a failure of the cofferdam and potential loss of work to date;
¦ protect health and safety of contractors and employees during the final stages of the
river work;
¦ prevent further scouring of the river bottom in this localized area; and
0 expedite completion of all work in the river.
Due to recent rain events and associated high river velocities, the existing scour hole has
developed and now the structural integrity of the cofferdam has been compromised. Two
of three support rings have been removed from inside the coffercell as part of a planned
and phased approach to remove the coffercell from the river. However, once the second
support ring was removed, high river flows bowed the coffercell and construction crews
had to immediately evacuate the area due to health and safety concerns. Lack of lateral
support from the river bed at the foot of the sheet pilings is believed to be the primary
cause for this development.
In order to complete the project, Class B rip rap is required to be placed in the scour hole
at the base of the cofferdam as shown on the attached Figure 1. This will add lateral
support to the coffercell and allow for its safe removal. If the cell is removed without the
rip rap stabilization, the fill under the newly constructed screens will slough off into the
scour hole. After that event fill would have to be replaced under the intake screens.
P:tGreenville Utilities:138582 Raw Water Intake-CA and Add] Serve-600 CA Services:-214 PermittinElLtr J Pelletier USACE Permit
Change Final.doex
E n v i r o n ni e n t a l F_ n g i n e e r s er C o n s u l t a n t s
Mr. Josh Pelletier
March 11, 2010
Page 2
To control the area of fill, survey rods will be placed along the edges of the impact area
and washed Class B rip rap will be placed in shallow layers to prevent mounding. Rip rap
will only be placed to a maximum height of -13 MSL which is well below natural river bed
contours as shown on the attached Figure 1. As a result of the proposed stabilization
measures, impacts to approximately 0.02 acres (160 cubic yards) of Waters of the United
States (WOUS) are required. No impacts to navigation are anticipated.
An as-built survey will be completed and provided to the USACE for documentation of the
final impact area. Additionally, as requested, the applicant will notify the USACE of
project milestones: once stabilization measures are complete, once in-river work is
complete, and once the stream banks are stabilized.
Upon approval, Crowder anticipates 3 to S days to complete stabilization measures
(weather dependent). Once stabilization measures are completed and the cofferdam is
structurally secure, the contractor will move forward with removing the final support ring
and cofferdam from the river.
We appreciate you taking the time to meet with us onsite yesterday to discuss the proposed
project in more detail and thank you for your ongoing understanding, cooperation, and
support of this project. We look forward to a favorable response. Please do not hesitate to
contact me should you have any questions or require additional information.
Very truly yours,
BROWN AND CALDWELL
-Qe
J. Shearin Dramby
Regulatory Specialist
JSD:vb
cc: Barrett Lasater, GUC
David Springer, GUC
David Lekson, USACE
Enclosure
PiiGreenville UtilitiesA38582 Raw Water Intake-CA and Addl Servi-600 CA Servicest-214 PermittinglLtr 3 Pelletier USACE Permit
Change Pinal.dccx

}
PROFILE
HORIZONTAL SCALE: 1" = 30'
VERTICAL SCALE: 1" = 5'
15
EXISTING GRADE (TYP)
TOP OF BANK
\ ?- PROPOSED GRADE (2:1)
10

RIVER BED
INTAKE SCREENS
INTAKE
PIPE #2
1 3+00
I I -7.0' MSL
II
1 \
-\i L
\ \ -11.5' M L
INTAKE PIPE #1 !
CLASS B RIP RAP
(WASHED) APPROX. 160 CY
3+50 4+00
5
TEMPORARY
COFFER CELL WALL
0
15'A
I II I -5
! a
!
!,I I I

-10
I II
I !
-13.0' MSL
LJ!
-15
? SC OUR LIMITS
8.0' MSL (AVE)
7-1
-20
-+ 50 5+00
PROJECT NO: 138582
FIGURE 1 - PROPOSED SCOUR REPAIR DATE: 03/10/2010
B R O W N AND SCALE: SEE FIGURE
CALDW:ELL
GREENVILLE UTILITIES COMMISSION ADDENDUM NO:
SHEET REVISED:
RAW WATER INTAKE IMPROVEMENTS
ATTACHMENT NO: