20080166 Ver 1_More Info Received_20080211

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ECS CARULI.NAS, LLP
Geotechni~cal~-Constructiola Materials ~Enviranmental
Ms. Cyndi Karoly
NC Division of Water Quality
401 Oversight/Express Review Permitting Unit
1650 Mail Service Center
Raleigh, NC 27699
RE: Request for More Information
Colleton Crossing Subdivision
Carrboro, Orange County, North Carolina
ECS Project #15105
DWQ# 08-0166
Dear Ms. Karoly:
February 7, 2008
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Please find attached the additional. information you requested via letter dated February 5, 2008.
Should you need any other information, please contact me at (y19) 861-9839.
Respectfully submitted,
ECS Carolinas, LLP
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Christina Breen, Mark Brown, LG, PG, RSM, Principal,
Senior Environmental Scientist Environmental Services Department Manager
Enclosures: Memorandum from Mr. Patrick Morrow, Phillip Post & Associates
Copies: Mr. Andrew Williams, U.S. Army Corps of Engineers, 6508 Falls of the Neuse
Road, Suite 120, Raleigh, North Carolina 27615
Mr. Jim Melville, MBI Development, PO Box 2684, Chapel Hill, NC 27514
Mr. Patrick Morrow, Phillip Post and Associates, 401 Providence Road, Suite 200,
Chapel Hill, NC 27514
9001 Glenwood Avenue, Ra18lgh, North Carolina 2~76L7-7505 • (919) 861-99,10 'FAX (919} 861-991 i " L-800-327-5832 • www.ecslimited.corai
Abeideen, MII- Atlanta, ~'rA -Austin, T.x - Baltimore, MD Buford, QA ~ Chantilly, VA • Charlptte, NC , Ghicagp, IL • Dallas, T'x
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Memorandum
Date: February 6, 2008
To: Mrs. Cyndi Karoly, Supervisor
From: Patrick Morrow, Project Manager
RE: Colleton Crossing DWQ Project # OS-0166
Request For More Information Feb. 5, 2008
Mrs. Karoly,
The reason for the location of the culvert in resper_t to Reynard Road and the existing channel is due to
several factors and are outlined in the following summary.
Summary:
The natural creek channel is not straight at the point where the existing stub for Reynard Road is located
and the proposed extension is going to go. The topography is such that there needs to be a
considerable amount of fill placed in order to make the crossing. Due to the large amount of fill
required, the side slopes of the road are increased considerably. This increase in the side slopes of the
road result in a situation where placing the culvert in the natural channel where it crosses the road to
result in the disturbance of an additional ±175 feet of the existing creek to the north and an additional
±175 feet to the south. (Please see Exhibits previously furnished). This would increase the disturbance
to the existing channel to over 500 feet.
We believe, and hope you concur, that putting the culvert outside of the existing channel would limit
the disturbance to the existing creek channel to the absolute minimum.
1 hope this answers your question. If further information is need, please feel free to contact me at 919-
929-1173.
Sincere)
Patrick L. Morrow, Project Manager
401 Providence Road, Suite 200 Chapel Hill, NC 27514 [phone] [phone] FAX [phone]