20070624 Ver 1_Staff Comments_20070521 (1384)

Jarmans Oak feedback
Subject: Jarmans Oak feedback
From: Tammy Hill <[e-mail]>
Date: Mon, 21 May 2007 13:44:12 -0400
To: Randy Turner <[e-mail]>
CC: Eric Kulz <[e-mail]>, Cyndi Karoly <[e-mail]>
Hi, Randy. I'm getting back to you about the Jarmans Oak restoration plan. Our
comments are below - I understand you have already addressed the issue of the
ditches by adding treatment wetlands. The wetland portion of the proposal looks
fine. The only further concerns involve some wording in the success criteria
section, as detailed below.
1) Concerns and Comments
a) _Overall_: Due to the level of disturbance from agricultural use
(non-existent riparian buffer, straightened and eroding channels, input of
agricultural chemicals, etc.), it appears that the site and related water quality
will benefit from stream and wetland restoration and enhancement.
b) _Streams_: Our main concern involves the direct discharge of two
agricultural ditches into restored streams, as detailed in Figure 12A of the
restoration plan. Input from these ditches will not have had the water quality and
force attenuation benefits associated with passing through a riparian buffer. We
want to make sure that Restoration Systems has adequately explored the potential
impacts of these inputs on the proposed restored system.
c) _Wetlands_: The proposed design of low gradient, braided stream flow, and
wetland-stream complex at the confluence of the Southern (East) and Main tributaries
is interesting and appears to be well-placed within hydric Muckalee soils. We
appreciate the proposals to reestablish floodplain connectivity and to minimize
construction impacts in appropriate areas.
d) Success criteria_
i) Section 7.0 of the restoration plan should specify that monitoring will
take place for a *minimum of five years* and will continue until success criteria
are fulfilled.
ii) Section 7.6 Vegetation Success Criteria: The restoration plan suggests
supplemental planting if the *average* site density does not meet designated success
criteria. We suggest that, in order to receive full mitigation credit and maximize
potential for site success, the applicant should perform supplemental planting in
significantly failing subsets of the site, even if the overall site average meets or
exceeds the criteria.
Thank you for the heads up about the project. We look forward to working with you
toward its success. If you have any questions, feel free to contact me.
Kind regards,
Tammy
Tammy Hill
Environmental Senior Specialist
NC Division of Water Quality (401/Wetlands)
2321 Crabtree Blvd., Suite 250
Raleigh, NC 27604
919-715-9052 (voice)
919-733-6893 (fax)
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