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Home My WebLink About20170921 Ver 1 _PostContractMemo_7_25_2017 _20170731MEMORANDUM July 31, 2017 RE: Major Hill Stream and Wetland Mitigation Site Post -IRT Site Visit Notes DMS Project ID: 100015 Attendees: USAGE: Todd Tugwell, Kim Browning NCDWR: Mac Haupt NCWRC: Travis Wilson NCDMS: Melonie Allen, Lindsay Crocker, Jeff Schaffer AXE: Grant Lewis, Kenan Jernigan RS: JD Hamby, Worth Creech On Tuesday July 25, 2017, representatives of the Interagency Review Team (IRT) met with representatives from North Carolina Division of Mitigation Services (NCDMS), Restoration Systems (RS), and Axiom Environmental (AXE) at the Major Hill Stream and Wetland Mitigation Site to review proposed site mitigation features and approaches. Below is a summary of what was discussed onsite and how those comments will be addressed as the mitigation plan moves forward. This proposal will be further refined in the development of the mitigation plan Please see the proposed asset map (attached) for reference. UTI: There was a discussion about dam removal for stream restoration credit. The IRT would like to see as much of the dam removed as possible. In addition, ponds with cattle access may require sediment removed from the pond bed. The goal for dam removal should include channel connectivity to a wide floodplain. The IRT also requested proactive channel design and construction occur within the abandoned pond bed and to not rely on passive channel formation. RS and AXE will take these comments into consideration during the design phase of the project, and the upper portion of UT 1 is proposed for restoration. There was a discussion about functional uplift within the lower portion of UT 1 given the condition of the stream and the bedrock substrate. It was determined that the understory was impacted by cattle (hoof sheer, etc.) which does warrant the enhancement (level lI) approach at a 2.5:1 mitigation ratio. Given that cattle removal will be the main argument for enhancement (level II), it was suggested that water quality monitoring and benthic sampling may provide good information on the uplift occurring in the enhancement (level II) reaches. These 1101 Haynes St., Suite 211 • Raleigh, NC 27604 • www.restorationsystems.com • Ph 919.755.9490 • Fx 919.755.9492 UT 2: UT 3: comments will be considered when developing a pre- and post -construction monitoring plan. The approach of enhancement (level II) at a credit ratio of 2.5:1 was agreed upon by all parties for this reach. The approach of enhancement (level II) at a credit ratio of 2.5:1 was agreed upon by all parties for this reach. Since cattle removal is the main argument for the enhancement (level II) approach, the IRT suggested high-quality crossings at all crossings as well as a high quality fence and serious discussion with the landowner about the penalty for livestock encroachment in the easement. It was also suggested that water quality monitoring and benthic sampling may provide good information on the uplift occurring in the enhancement (level II) reaches. This will be considered when developing a pre- and post -construction monitoring plan. All remnant fencing will be removed within the easement Invasive vegetation will be treated. Wetland Restoration/Enhancement: • All proposed wetland approaches were agreed upon by the IRT. Thank you, 401ro Aoe Worth Creech Restoration Systems 1101 Haynes St., Suite 211 • Raleigh, NC 27604 • www.restorationsystems.com • Ph 919.755.9490 • Fx 919.755.9492 i I Legend Alamance County Parcels _ N Easement = 15.4 acres Stream Restoration = 1856 linear feet C Stream Enhancement (Level II) = 3445 linear feet Non-credit Generating Area MarshTreatment O ® Wetland Restoration = 0.55 acres Wetland Enhancement = 0.41 acres a �k f - �� N� tY ti•M 9. yi�� .ro• ,� A A M- \ 7q� ,1 N "N'( 8 room Oilt .,**..-� n ri QL alp F r r x 1 T - t r A a �it S.♦ ) Y.. a tr ,'r.,r'As_E - t d t>r. V VrT , ^. " 0 70 140 280 420 560 Feet Dwn. By: WGL FIGURE Date: Jul 2017 A Axiom Environmental Snow Ave Ral Raleigh, NC 27607 PROPOSED CONDITIONS Ma or Hill Stream and Wetland Miti ation 1 J (919) 215-1693 Alamance County, North Carolina Project: 17-009 Major Hill Proposed Asset Table: Riparian Stream Riparian Stream Mitigation Type Stream Wetland Mitigation Mitigation Wetland (linear feet) (acreage) Ratio Units Mitigation Units Restoration 1856 -- 1:1 1856 -- Enhancement (Level II) 3445 -- 2.5:1 1378 -- Wetland Restoration -- 0.55 1:1 -- 0.55 Wetland Enhancement -- 0.41 2:1 -- 0.20 Totals 5301 If 0.96 ac 3234 SMU 0.75 WMU