20070410 Ver 1_More Info Received_20090219

chnabe/
11-A Oak Branch Drive
Greensboro, NC 27407
Schnabel Engineering South, PC
February 13, 2009
Mr. Andy Williams
U.S. Army Corps of Engineers
6508 Falls of the Neuse Road, Suite
Raleigh, North Carolina 27615
MV91
F Ea 19 2009
DEW- S10eM WA DV
V0C 1
120 WEnODS AND ST
Phone[phone]
Fax[phone]
wvvw.schnabel-eng.com
U1
SUBJECT: City of Greensboro Lake Townsend Dam Spillway Replacement
Individual 404 Permit (SAW# 2007-00895-241)
Dear Mr. Williams:
This letter is in reference to Special Condition No. 8 of the approved Section 404 Permit (SAW#
2007-00895-241) for the Lake Townsend Dam Replacement project. As you are aware, fill material
(inert concrete that may contain rebar) will be generated during the demolition of the existing
spillway and pump house following completion of the new dam and spillway. As stated in the
approved Permit, the fill material will be left underwater as beneficial fill between the existing and
new spillways. This location is within the existing impact boundaries defined in the approved 404
Permit. With regard to Special Condition No. 8 of the approved 404 Permit, the City of Greensboro
has provided verification that the inert concrete is free of paint and/or other contaminants (see
attached letter).
If you require any additional information or have any questions please feel free to contact at (336)
274-9456.
Sincerely,
Schnabe Engineering South, PC
Robert P. Cannon
Project Manager
ROAR
Attachment
cc: Ian McMillan, DWQ;
Melinda King, City of Greensboro;
Robert Teem, Brown and Caldwell
FILE: 0:12000_PROJECTSM210017 (CITY OF GREENSBORO LAKE TOWNSEND)1CORRESPONDENCEICORPS OR SEPA PERMR7ING AGENCIESMILLIAMS 01 • CLARIFICATION ON BENEFICIAL FILL.DOC
"'We are committed to serving our clients by exceeding their expectations."
Geotechnical • Construction Monitoring • Dam Engineering • Geoscience • Environmental
ATER
sources
city of Greensboro
Administration February 3, 2009
[phone]
Fax [phone]
Mr. Robert Cannon
Schnabel Engineering South, PC
Customer Service 11A Oak Branch Drive
[phone] Greensboro, NC 27407
Fax[phone]
Subject: Lake Townsend Dam Spillway Replacement Project; Reuse of
Water Supply Concrete as Beneficial Fill
Mitchell Plant
[phone] Dear Mr. Cannon:
Fax[phone]
Townsend Plant As you are aware, Brown and Caldwell has been engaged in discussions with
[phone] representatives from the United States Army Corps of Engineers (USACE) and the
Fax [phone] North Carolina Department of Environment and Natural Resources (DENR) -
Division of Water Quality (DWQ) regarding the placement of beneficial fill within
the impact boundaries defined in the approved 404 Permit (SAW# 2007-00895-241)
Water Reclamation
North Buffalo Plant and 401 Water Quality Certification (DWQ-2007-0410). The beneficial fill will
[phone] consist of inert concrete (containing rebar and steel) from the existing spillway and
Fax [phone]
pump house that will be demolished upon completion of the new dam and spillway.
T.Z. Osborne Plant A majority of these structures proposed for demolition are located underwater
and
[phone]
Fax [phone] ,
off-site disposal of the concrete debris derived from these structures is significantly
more costly than allowing the concrete to be used as underwater beneficial fill
between the existing and new spillways.
Construction &
Maintenance The City of Greensboro has researched available dam maintenance records and did
[phone] not find any documentation related to the presence or use of paint or other
Fax [phone]
contaminants on the concrete proposed for use as beneficial fill.
Following approval of the use of the beneficial fill by the USACE and DWQ, the
Meter Services
[phone] City of Greensboro authorizes the placement of the beneficial fill as described in the
Fax [phone] approved 404/401 permits.
Please do not hesitate to contact me if you have any questions or require additional
Water Conservation information

[phone] .
Fax [phone] Very truly yours,

Stormwater fill
Management Melinda King
[phone]
Fax [phone]
Enclosures
cc: Robert Teem, Brown and Caldwell
1508 P O. Box 3136, Greensboro, NC 27402-3136 • www.greensboro-nc.v_ • TDD [phone]