20171041 Ver 1_IRT meeting minutes_2017_20170929

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Date: September 29, 2017
Re: Little Sebastian Site Post -Contract IRT Site Visit Meeting Minutes
CU: 03040101
DMS Project No.: 100027
DEQ Contract No.: 7187
County: Surry
Location: 36.395995° N, -80.861755° W; Ed Nixon Road, Thurmond, NC
DMS Project Manager: Paul Wiesner
Meeting Summary
Date: August 15, 2017
RES Attendees: Daniel Ingram, Cara Conder, David Godley, Daniel Ramsay
DMS Attendees: Paul Wiesner, Harry Tsomides, Kirsten Ullman
IRT Attendees: Todd Tugwell (USACE), Mac Haupt (NCDWR), Olivia Munzer (NCWRC)
General Summary: IRT members generally agreed the Little Sebastian Site is suitable to provide
compensatory stream mitigation credits. IRT members commented on the proposed mitigation
ratios for several stream reaches. Because of the IRT comments a modified conceptual plan is
attached to this memorandum detailing the updated approach, ratios, and estimated credit yield.
Total site credits were originally proposed as 4,653 have been reduced to 4,368 (285 credit
reduction). However, some opportunities exist to increase credit yield based on the final
mitigation approach and buffer widths. The proposed mitigation approach and crediting will be
justified in the final mitigation plan. Specific discussions related to each reach are discussed
below.
Reach JN 1-A: RES proposed this reach as EII with a 2.5:1 credit ratio. IRT members
questioned the appropriateness of this ratio and proposed bank stabilization efforts. The upper
end of this reach lacks obvious livestock impacts and has an intact buffer on the right bank. Bed
material is mostly cobble and lacks obvious sedimentation issues. To address IRT comments the
proposed credit ratio has been changed to 10:1 above the driveway crossing and 5:1 through the
remainder of the pasture.
Reach JNl-B: IRT members agreed this reach merits restoration along most of its length. Todd
Tugwell questioned the proposed upstream limit of restoration and suggested it be moved
downstream based on channel conditions. In response, the revised conceptual plan begins
restoration approximately 100' downstream from where originally proposed. Due to the tie-in
with JN3 and elevation constraints RES believes that is a feasible break point between
enhancement and restoration. Topo survey and detailed channel assessments will determine the
412 N. 4th St. #300 1200 Camellia Blvd. #220 1434 Odentdh Rd. 10055 Red Run Blvd. #130 302 Jefferson St. #110 33 Terminal Way #431
Baton Rouge, LA 70802 Lafayette, LA 70508 Odenton, MD 21113 Owings Mills, MD 21117 Raleigh, NC 27605 Pittsburgh, PA 15219
701 E. Bay St. #306 5020 Montrose Blvd. #650 2750 Prosperity Ave. #220 1521 W. Main 21d Floor 3751 Westerre Pkwy. #A 5367 Telephone Rd. 1371h East Main St. #210
Charleston, SC 29403 Houston, TX 77006 Fairfax, VA 22031 Richmond, VA 23233 Richmond, VA 23220 Warrenton, VA 20187 Oak Hill, WV 25901

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final proposed limits of restoration. The proposed Gideon RES Bank Site located between JNI
and MCI was also discussed. RES intends to permit and construct this bank site in sequence
with the Little Sebastian project, However, due to its downstream location from JN1 it is not
expected to impact development of the full delivery project.
Reach JN2: This reach was originally proposed as restoration and EII. IRT members questioned
the necessity for restoration on the upper reach but generally accepted EII as an appropriate ratio
for most of the reach. IRT members agreed the upstream most segment in the upper pasture area
is highly impaired by livestock access and a higher level of intervention is appropriate. RES has
proposed this short segment as EI to address IRT comments. The ephemeral reach proposed for
protection and BMP placement was discussed as potentially intermittent and appropriate for
preservation at either 10:1 or 5:1 credit based on protected buffer width. If the reach is
intermittent the BMP will not be constructed, rather the easement will be extended to provide
preservation to the origin point in the forested watershed. The JD will ultimately determine the
limits of preservation. The downstream end of Reach JN2 near the confluence with Mill Creek
is proposed as EI based on IRT comments. Mac Haupt stated that restoration may also be
acceptable based on survey and detailed channel assessment results.
Reach JN3: RES originally proposed JN3 as a combination of EII on the upstream end and
restoration along most of its length. The IRT generally agreed with this approach, however they
suggested the upstream segment is more appropriate as preservation at a 10:1 ratio. IRT
members commented that the upstream limit of restoration could be extended to better tie-in with
the valley low point and provide adequate buffer from the farm road. The revised concept plan
incorporates these modifications.
Reach MCI: RES originally proposed this reach as EII with a consistent 2.5:1 ratio. Based on
IRT feedback throughout the Little Sebastian site visit that concept has been refined to include a
short segment of 10:1 preservation at the upstream end, EII along most of the reach, EI at the
ford crossing, and 5:1 enhancement below the crossing. The EII segment will include bank
stabilization and riparian plantings in conjunction with an improved ford crossing. The EI ratio
is intended to include substantial bank stabilization and instream structures to provide a stable
ford crossing. The 5:1 enhancement will include livestock exclusion and left bank riparian
plantings. The final exact limits of each mitigation prescription will be based on topo survey and
design.
Reach BSI: No changes to the BSI conceptual plan are proposed. IRT members generally
agreed with the enhancement and restoration approach based on impairment and construction
access. Restoration in-place was discussed with the group and agreed to be an acceptable
approach where floodplain access is limited. Final limits of restoration and enhancement will be
based on topo survey and detailed channel assessments.
412 N. 4th St. #300 1200 Camellia Blvd. #220 1434 Odenton Rd. 10055 Red Run Blvd. #130 302 Jefferson St. #110 33 Terminal Way #431
Baton Rouge, LA 70802 Lafayette, LA 70508 Odenton, MD 21113 Owings Mills, MD 21117 Raleigh, NC 27605 Pittsburgh, PA 15219
701 E. Bay St. #306 5020 Montrose Blvd. #650 2750 Prosperity Ave. #220 1521 W. Main 21d Floor 3751 Westerre Pkwy. #A 5367 Telephone Rd. 1371h East Main St. #210
Charleston, SC 29403 Houston, TX 77006 Fairfax, VA 22031 Richmond, VA 23233 Richmond, VA 23220 Warrenton, VA 20187 Oak Hill, WV 25901

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