19970722 Ver 1_Mitigation Plan Review_19980925

State of North Carolina
Department of Environment
and Natural Resources
Division of Water Quality
James B. Hunt, Jr., Governor
Wayne McDevitt, Secretary
A. Preston Howard, Jr., P.E., Director
10 Nook
NCDENR
NORTH CAROLINA DEPARTMENT OF
ENVIRONMENT AND NATURAL RESOURCES
September 25, 1998
Andrea M. Spangler
Environmental and Special Projects Manager
Piedmont Triad Regional Water Authority
Wilmington Building, Suite 207
2216 West Meadowview Road
Greensboro, NC 27407 -3480
Dr. Gerald McCrain
EcoScience Corporation
612 Wade Avenue
Raleigh, NC 27604
Re: Randleman Lake Compensatory Mitigation Proposal
Dear Ms. Spangler and Dr. McCrain:
Pete Colwell and I have reviewed the July 1998 Preliminary Wetland Assessment
prepared by EcoScience for the wetland mitigation for the Randleman Lake project. The
proposal identifies 10 potential wetland mitigation sites, which are projected to yield 122
acres of wetland restoration, or creation, which will satisfy the 1:1 wetland mitigation
requirement for the project. At six of the sites a total of 69 acres of wetlands are
proposed to be restored or created by the use of in- stream structures to put water back
onto existing floodplains. The remaining 4 sites will create wetlands through "green tree
impoundments" along the associated stream.
As stated in our July 20, 1198 correspondence, the Division feels that the
proposed wetland mitigation sites are worthy of further examination. We also realize
that the Authority may acquire property through the power of eminent domain. However
this process may take a considerable amount of time. Prior to the issuance of the 401
WQC the Division will need to have a time frame for acquiring the proposed mitigation
properties. The items listed below from our July 20 letter should be addressed in the
detailed mitigation plan, which should be submitted for written approval prior to any
construction activities in wetlands.
Environmental Sciences Branch 4401 Reedy Creek Road Raleigh, North Carolina 27607
Telephone [phone] FAX # [phone]
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1) Minimal release of water with the instream structures to maintain existing
uses in the streambed.
2) Design criteria that might allow for fish migration in the larger streams.
3) Maintenance and management of the water control structures, particularly
with the green tree impoundments.
4) Possible use of "forebays" to collect sediments and protect the wetland
mitigation sites downstream.
5) Planting schemes for each mitigation site.
6) Monitoring plan with success criteria.
We still encourage the Authority to identify some additional potential mitigation
sites should any of those proposed fail to produce the wetland acres estimated or are
simply not available for mitigation. It is our understanding the Environmental
Management Commission will review the Watershed Management Plan for the proposed
reservoir at their November meeting. We will consider the issuance of the 401 WQC
after the Management Plan is approved by the EMC. Should you have any questions or
wish to discuss additional mitigation sites please contact Pete Colwell or myself at 919-
733 -1786.
S'ncerel
Jo n R. Dorney
W tlands / 401 Grou
cc: Ed Powell, DMP
Ron Linville, DWQ Winston -Salem Regional Office
David Franklin, US Army Corps of Engineers -
Pete Colwell, DWQ Central Office