20090633 Ver 1_DMS IRT Site Visit Request Memo_20151006

Project Summary/Site Visit Request
TO: Interagency Review Team (IRT) members
FROM: Melonie Allen, DMS Project Manager
RE: Request for Establishment of Stream Enhancement and Preservation Mitigation Ratios
UT West Fork Deep River
CU 03030003; Forsythe & Guilford Counties
IMS # 442
Fund Code 2984
DATE: 10/01/2015
The Ut to West Fork Deep River is a DMS DBB stream mitigation project transferred to EEP in 2005 by
NCDOT. There were a number of delays associated with the project including property acquisition
(completion of original DOT acquisition held up by easement expansion), limited construction access and
design concerns. The project was dropped by DMS in 2011 and resurrected in 2014 (see timeline below).
Brief Project History
Task
Project Transfer from NC DOT
EEP PRC Presentation
EEP Project Designer Assigned
Conceptual Plan
Draft Mitigation Plan Submitted
Final Mitigation Plan Approved
404/401 submitted
401/404 issued
Draft Construction Plans Submitted
Project resurrected
Date Completed
? (2005)
3/2007
3/2007
8/2008
9/2008
3/2009
4/15/2009
11/24/2009 (expired
11/24/2011)
Project on hold/dropped 2010
? 2014
Ut to the West Fork Site had a number of factors that resulted in a re-examination of the project's
viability. The concerns associated with the site are:
1. Lateral constraint - the easement limits the belt width of the project
2. Vertical constraint - the existing conditions resulting from historical land use and ongoing
stressors in the watershed have resulted in a channel that is both incised and entrenched through
a combination of downcutting and aggradation of legacy sediment.
3. The project reach is located in a FEMA regulated zone.
These constraints have limited the design options for the site. Priority I restoration is not possible due
to easement width as well as the length of the reach being insufficient to accommodate the profile
adjustment that would be necessary to restore floodplain functionality. Priority II, the original design for
the site, is also not a suitable solution for this reach in particular given that the site is currently
functioning as a sand bed system. The long-term stability of the site would require that the sediment
transport analysis be accurate not only for current conditions but also for future conditions in a

developing watershed. A priority II restoration would entail the typical concerns associated with bank
stabilization and vegetation establishment associated with working in subsoil as well as an added risk of
potential for deposition on benches; which could ultimately re-create a stream system resembling the
current condition. Stream enhancement I accomplished through dimension adjustment would have a
similar risk. In lieu of the limited design options subject to uncertain success, planting the easement and
treating the invasive species would benefit the site. DMS has funded the design and construction of
agricultural BMPs on site. Fencing and alternative watering structures were designed by Guilford Soil &
Water District and installed by DMS contractor in 2011. Given the work proposed; planting, invasive
species treatment, cattle exclusion fencing and alternative watering, DMS is proposing a combination of
stream enhancement and preservation on Ut West Fork of Deep River. Given the level of channel
impairment, DMS is seeking IRT input on steam enhancement and preservation mitigation ratios.
UT West Fork Deep River - Asset Summary
Type of Asset Original Assets Original Credits Revised Assets* Estimated
Revised Credits
Stream Restoration (10
2201
2201
0 0
Stream Enhancement 1 00
990
660
0 0
Stream Enhancement 2 00
0
0
2456 ?
Stream Preservation 00
2040
408
2775 ?
Buffer Restoration & Enhancement (sq. It 237837 237837 242,372
*Buffer assets were revised to reflect the 2014 Consolidated Temporary Buffer Rules, will be re-evaluated
and verified at mitigation plan stage; stream assets to be determined.
Project Location: 1609 Squire Davis Rd Kernersville, NC 27284