20090056 Ver 1_Staff Comments_20090130

RE: Greenbrier Creek Stream Restoration - Alamance and Chatham... O q - D D S 6
Subject: RE: Greenbrier Creek Stream Restoration - Alamance and Chatham Counties (09-0056)
From: "Toni Wyche Jones" <[e-mail]>
Date: Fri, 30 Jan 2009 12:47:53 -0500
To: Eric Kulz"' <[e-mail]>
CC: <[e-mail]>, "'Kristie Corson"' <[e-mail]>
k. RIA- C.
Hi Eric,
Thank you for the speedy review and approval.
EEP voiced the same concern to Biohabitats about the atypical riffle structures. Biohabitats provided justification
for their design by referencing literature for the Newbury Weir. The riffle structures are patterned after the
Newbury Weir, as it, too, is often used in low gradient systems.
In the meantime, if additional questions/concerns arise, please do not hesitate to contact me
Enjoy your weekend!
Toni Wyche Jones, El, CFM
NCDENR Ecosystem Enhancement Program
1652 Mail Service Center
Raleigh, NC 27699-1652
ph: 919.715.1324
cell: 919.218.0497
fax: [phone]
http://www.nceep.net/
NOTICE: E-mail correspondence to and from this address may be subject to the North Carolina Public Records Law and
may be disclosed to third parties.
From: Eric Kulz [mailto:[e-mail]]
Sent: Wednesday, January 28, 2009 2:54 PM
To: Toni Wyche Jones
Cc: Laurie.][e-mail]
Subject: Greenbrier Creek Stream Restoration - Alamance and Chatham Counties (09-0056)
Toni:
DWQ has reviewed the proposed stream enhancement and preservation plans for the above-referenced
property. Our only question/concern is that due to the low gradient of the mainstem of Greenbrier
Creek, installation of the raised riffle structures may restrict base flow, resulting in a series of pools
separated by the riffle structures. We hope the riffle material selected for the project will allow for
both downstream flow through the interstitial spaces and for exchange between groundwater and the
base flow (development of a hyporheic zone).
However, DWQ deems the project issued, and we hope you work with the designed and construction
contractor to address these concerns.
Have a great day,
Eric
Eric W. Kulz
1 of2 1/30/2009 1:09 PM
RE: Greenbrier Creek Stream Restoration - Alamance and Chatham...
Environmental Specialist
401 Oversight and Express Permitting Unit
2321 Crabtree Blvd., Suite 250
Raleigh, NC 27604
Phone: [phone]
Fax: [phone]
2 of 2 1/30/2009 1:09 PM