20001005 Ver 1_Monitoring Report Review_20100929

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NCDENR
North Carolina Department of Environment and Natural Resources
Division of Water Quality
Beverly Eaves Perdue Coleen H. Sullins
Governor Director Dee Freeman
Secretary
September 29, 2010
Mr. Mark A. Saunders
Seascape At Holden Plantation, LLC
131 Ocean Boulevard, West
Holden Beach, NC 28462
Subject: Seascape At Holden Plantation
Brunswick County
Dear Mr. Saunders:
On August 15, 2010, the Division of Water Quality (DWQ) received your well monitoring report
for the lower ponds (pond #2) at Seascape at Holden Plantation. On August 24, 2010, we met
with the U.S. Army Corps of Engineers (USACE) to re-verify the previous wetland jurisdictional
determination. On August 30, 2010, we met with representatives of the Seascape Property
Owner's Association to hear additional concerns regarding the upper (pond #4) and lower ponds
(pond #2) on the development.
After reviewing the information in the well monitoring report, performing site investigations, and
consulting with the experts from the Division of Water Resources (DWR), it is our belief that the
underdrain system with perforated pipes has adversely impacted the hydrology of waters of the
U.S., resulting in impacts to the wetland's existing uses. Moreover, we do not believe that the
restoration plan presented in your report dated August 15, 2010, will provide adequate
restoration of wetland hydrology.
As such, the Division requests that you submit a restoration plan including a schedule for its
implementation that will result in adequate restoration of historic wetland hydrology to the
referenced ponds. In addition to providing restoration of wetland hydrology, it must comply
with the plans and specifications in Stormwater Permit SW8990913 MOD issued as approved on
April 02, 2008. Specifically where hard piping was approved south of pond #2, and perforated
pipe was installed instead, the perforated piping must be removed and replaced with hard piping.
In addition, please include in your restoration plan groundwater monitoring wells to track the
progress of the restoration activities. Monitoring shall be implemented for a minimum of five
years and include proposed success criteria for determining if appropriate wetland hydrology has
been restored to the impacted waters. In addition, your plan should include contingency actions
in the event that the monitoring demonstrates that the restoration plan is not working as
anticipated to restore the hydrology to the wetlands.
I-PA Carolina
North Carolina Division of Water Quality 127 Cardinal Drive Extension Phone [phone] Customer Servicel-877-623-67. 11WA(M !f
Wilmington Regional Office Wilmington, NC 28405-3845 FAX [phone] Internet: h2o.enr.state.nc.us
An Equal Opportunity/Affirmative Action Employer-50% Recycledl10% Post Consumer Paper
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Seascape
Brunswick County
It appears from the stormwater plans that corrugated perforated piping may have been installed
in the area adjacent to the upper pond (pond #4). Also, the September 25, 2000, hydrogeological
investigation report mentions installation of subsurface drainage in this area similar to that
installed near the lower ponds (pond #2) that may be adversely impacting the hydrology to the
wetlands. Please provide accurate drawings showing the type of piping that was installed is this
area. If perforated piping was installed in this area, then a determination will be required to
ascertain the effects the piping has had on the wetlands around the upper pond (pond#4).
Finally, it appears (based on the previous jurisdictional determination) that unauthorized impacts
to wetlands have occurred in other locations in the development. Division staff will be
investigating these possible impacts in the near future. We would appreciate your aid and
cooperation in this matter. If you have any questions, please contact Chad Coburn or myself at
[phone].
Sincerely,

Rick Shiver
Surface Water Protection Section
Wilmington Regional Supervisor
cc: John Hennessey - NPS-ACO Unit, Archdale Building
Ian McMillan - 401 Oversight/Express Review Permitting Unit
David Timpy - USACE Wilmington Field Office
Ronnie Smith - USACE Wilmington Field Office
Nathaniel Wilson - NC Division of Water Resources
John Payne - Attorney General's Office
WiRO