20080612 Ver 1_More Info Received_20080506

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DR. J.H. CARTER III & ASSOCIATES, INC.
Environmental Consultants
P.O. Box 891 • Southern Pines, N.C. 28388
[phone] • Fax [phone]
1 May 2008
Ms. Cyndi Karoly
401 Oversight/Express Review Permitting Unit
NC Division of Water Quality
1650 Mail Service Center
Raleigh, NC 27699-1650
RE: Pinehurst No. 7 Stream Restoration
DWQ Project #08-0612, Moore County
Dear Ms. Karoly:
Q?c?r?oe?p
MAY 6 2008
DENR - WATER QUAUTY
WETLANDS AND STDRMWATER BRANCH
This letter is in reference to the request for more information in a letter dated 25 April 2008,
regarding the proposed stream restoration at Pinehurst No. 7, Moore County, North Carolina (NC). I
have been in contact with Mr. Ken Averitte at the NC Division of Water Quality Fayetteville Regional
Office concerning this project. He has been onsite and is aware of the current conditions and the
proposed restoration activities. He mentioned that he would communicate with staff at your office to
help clarify our permitting request. In addition to Mr. Averitte's aid, we offer the following
information.
The segment of stream proposed for restoration measures approximately 205 feet and has
undergone severe bank erosion. It originates at an underground pipe containing the stream and ends at
a pond (Enclosure). The severe erosion is a result of scour from water exiting the pipe at high velocity
during periods of high flow, and has also resulted in excessive sedimentation in the pond and adjacent
wetlands. Due to development and subsequent increased impervious surface within the watershed,
high flow events occur nearly every time rain falls.
The proposed restoration aims to repair the current damage and to prevent future erosion and
sedimentation by performing the following tasks: installing a rip-rap or precast cement barrier near the
pipe exit, creating a plunge pool, stabilizing and reducing the grade of the stream banks where needed
and removing sediment from the pond and adjacent wetlands. The barrier will act as an energy
dissipater, slowing water velocity as it exits the pipe. Construction of the barrier will require either
large rip-rap or a precast cement structure in order to be effective. This structure will pose no threats
Endangered Species Surveys • Environmental Assessments • Land Management • Wetlands Mapping and Permitting

to aquatic life passage because stream continuity is nonexistent at this point - the piped section is
above the grade of the open channel (Enclosure).
The plunge pool will store and slow water and will allow sediment to settle. It will be created
by deepening a small section of the stream that has already been widened by erosion, requiring
minimal modification of the current conditions (Enclosure).
Undercutting and erosion of the stream banks will be mitigated by reducing the grade of the
banks and/or using logs or stumps as revetments where appropriate. Reducing the grade of the steep
portions of the bank will alleviate the currently constricted water flow, causing a further reduction in
water velocity. A current cross-section and a proposed cross-section of the bank grade were submitted
with the permit application. Strategic placement of natural materials, such as logs and stumps, will
reinforce vulnerable portions of the stream banks and will not be detrimental to aquatic life within the
stream segment.
Finally, sediment that has been deposited in the pond and adjacent wetlands will be removed.
No portion of the channel will be relocated and there will be no permanent impacts to jurisdictional
areas. The proposed action is not an elaborate stream restoration project, rather a fairly simple
proposal (and a voluntary effort by the proactive landowner) to abate an erosion/sedimentation
problem and prevent further degradation of these aquatic resources.
I hope this letter, in conjunction with the enclosed photographs and collaboration with Mr.
Averitte, clarifies your concerns regarding the proposed stream restoration project at Pinehurst No. 7.
Please contact me if you have additional questions or need more information. Thank you for your
time.
Sincerely,
Ojy?"*
Jennifer M. Archambault
Wildlife Biologist
Enclosure: Photographs of the Proposed Stream Restoration at Pinehurst No. 7, Pinehurst, Moore
County, North Carolina.
CC: Mr. Bob Farren, Pinehurst, Inc.
Mr. Ken Averitte, NC DWQ Fayetteville Regional Office
Ms. Emily Burton, Wilmington Regulatory Field Office, USACE
ENCLOSURE
Photographs of the Proposed Stream Restoration at Pinehurst No. 7,
Pinehurst, Moore County, North Carolina

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1. The stream segment proposed for restoration (above) begins at an underground
pipe (below), which is above the grade of the stream, and ends at a pond (background,
above).

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2. The approximate location of the plunge pool is shown in yellow (above) and the sheer
bank along the stream channel (below). Proposed activity along this bank includes
matching the opposite bank elevation (represented by red line, below) and reducing the
grade from that point to a 3:1 ratio (represented by the blue arrow, below).

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3. The pond downstream from the channel is filling up with sediment (above and below).
Figure 2 of the permit application clearly shows an aerial view of the sedimentation
(2007 Moore County aerial photograph).
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4. Only a stump remains at the former location of the stream bank (above), now located
several feet behind the stump. The cart path formerly meandered left of the current
bridge (represented by orange line, below), however, the land beneath it eroded away.
The area was stabilized with rip-rap and the bridge was built to restore access across the
stream.