20090547 Ver 1_Staff Comments_20090615

Kulz, Eric
From: Kulz, Eric
Sent: Monday, June 15, 2009 9:12 AM
To: 'Jones, Amanda D SAW'
Cc: Johnson, Alan; Karoly, Cyndi 09 d
Subject: Briar Creek Enhancement - Mecklenburg County (DWQ #0 2)
Amanda
I have reviewed the plan for the proposed enhancement of Briar Creek (only Reach 1 to be used for mitigation) and the
restoration of the Museum Drive tributary. Alan Johnson has also reviewed the plans and has visited the site.
The proposed restoration of the Museum Drive tributary looks fine, and DWQ has no comments on the proposed work
or credit ratio (1:1).
For the enhancement of Reach 1 of Briar Creek, while it may be true that their approach is a combiniation of E1 and E2,
the actual in-channel work is pretty limited (plans show installation of two single arm vanes and a double wing
deflector). For the most part, they are doing mostly bank work/benching due to multiple utility constraints. Also, the
buffer planting is restricted to herbaceous plants in many areas due to a sanitary sewer easement. In additiion, multiple
stormwater pipes discharge straight into the stream, and there is no indication in the plans for the installation of level
spreaders or other BMPs.
For these reasons, DWQ feels that 2.5:1 is a more appropriate credit ratio than 2:1. It is our opinion that the level of
functional uplift will be limited.
Please contact Alan Johnson or me if you have any questions regarding this project.
Eric