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LETTER OF PERMISSION: The University of Wisconsin – Oshkosh in collaboration with the Wisconsin Department of Natural Resources (WDNR) proposes to conduct a research project on the impacts to headwater streams and lakes from groundwater extraction for irrigation and municipal uses in central Wisconsin.

PROJECT DESCRIPTION AND PURPOSE: The University of Wisconsin – Oshkosh in collaboration with the Wisconsin Department of Natural Resources (WDNR) proposes to conduct a research project on the impacts to headwater streams and lakes from groundwater extraction for irrigation and municipal uses in central Wisconsin. The research project would assess the impacts of surface water discharge reduction on Emmons Creek by manipulating discharge at the reach-scale to simulate groundwater extraction in this tributary. The research project would be conducted from May 2018 through September 2023.

Information for File # MVP-2018-00741-EMN Applicant: State of Wisconsin, c/o Steven DeVitt Corps Contact: Eric Norton Address: 2926 Post Road, Suite B, Stevens Point, Wisconsin 54481 E-Mail: eric.m.norton@usace.army.mil Phone: (651) 290-5879 Project Location: NW ¼ SW ¼ of Section 13, Township 21 North, Range 10 East, Portage County, Wisconsin Information Complete On: April 17, 2018 Posting Expires On: May 17, 2018 Authorization Type: LOP-06-WI This application is being reviewed in accordance with the practices for documenting Corps jurisdiction under Sections 9 & 10 of the Rivers and Harbors Act of 1899 and Section 404 of the Clean Water Act identified in Regulatory Guidance Letter 08-02. Project Description: The University of Wisconsin ­ Oshkosh in collaboration with the Wisconsin Department of Natural Resources (WDNR) proposes to conduct a research project on the impacts to headwater streams and lakes from groundwater extraction for irrigation and municipal uses in central Wisconsin. The research project would assess the impacts of surface water discharge reduction on Emmons Creek by manipulating discharge at the reach-scale to simulate groundwater extraction in this tributary. The research project would be conducted from May 2018 through September 2023. The proposed work would involve the construction of a temporary 75-foot long by 9-foot wide straight-line diversion channel between two tightly meandering bends in Emmons Creek, the installation of a wing deflector, and the installation of a diversion structure upstream of the project area to direct flow into the diversion channel. In addition, a temporary road would be constructed in wetlands using timber mats to facilitate construction access to the project area. All excavated material from the diversion channel would be stockpiled and contained in uplands near the project area as shown on the attached figures. Upon completion of the research project, the temporary diversion channel would be backfilled and the diversion structures would be removed to restore the affected wetlands and natural flow of Emmons Creek. In addition, the stream banks would be stabilized using overhead bank covers and all disturbed soils would be revegetated with a native wetland seed mix. Name, area, and types of waters (including wetlands) subject to loss: The proposed project would temporarily impact 675 square feet of hardwood swamp for the construction of the diversion channel and temporarily impact 0.17-acre of hardwood swamp for the construction of the temporary access road using timber mats. Threatened and Endangered species: The project area may contain critical habitat for the Karner blue butterfly and Northern long-eared bat. Consultation with the U.S. Fish & Wildlife Service would be required to determine if the proposed project would affect these species. Compensatory mitigation: The applicant has proposed to restore the affected wetlands and stream upon completion of the research project. The applicant has proposed to backfill the diversion channel with the original soil in the order it was removed to restore the wetland and Page 1 of 2

stream bank. All disturbed areas would be seeded with a native wetland seed mix to avoid the introduction of non-native and invasive species into the project area. In addition, two overhead bank covers would be installed to stabilize the affected stream banks on the upstream and downstream ends of the project area. Drawings

See attached.

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MVP-2018-00741-EMN, Page 1 of 6

Project Area

Project Overview Map

MVP-2018-00741-EMN, Page 2 of 6

Project Area

Wisconsin Wetland Inventory Map and Hydric Soils

MVP-2018-00741-EMN, Page 3 of 6

Upland Disposal Site

500 feet long by 15 feet wide

75 feet long by 9 feet wide - 3 feet deep with 1:1 slope

MVP-2018-00741-EMN, Page 4 of 6

MVP-2018-00741-EMN, Page 5 of 6 Project Location: Emmons Creek, State of Wisconsin owned land (Emmons Creek Fishery Area) Township of Belmont, Portage County NW1/4, SW1/4, Sec. 13, T21N, R10E GPS - Lat: 44.29614 Long: -89.24019 Time Frame: Starting May 15th, 2021 and will be completed by September 15th, 2021 Seeding Plan: All disturbed soils throughout the project site will be seeded with a stabilizing grass (annual oats) and a mixture of native grasses and forbs either collected/provided by WDNR Wildlife Staff or purchased from Prairie Nursery Inc. All disturbed soils throughout the project will also be mulched with rye and/or oat straw. Bank Stabilization: Mitigation of the excavated channel will include removal of the flow manipulation structure, the installation of 2 overhead bankcovers, and replacement of excavated spoils back into to abandoned diversion channel. -Flow manipulation structure will be completely removed from the bed of the diversion channel. -A total of two overhead bankcovers will be installed on the outside bends of the main channel effected by implementation of diversion channel. Covers will be installed at the head and tail of the abandoned diversion channel. Estimated length of each overhead bankcovers is roughly 60 feet. See attached diagram of Overhead Bankcover. Overhead covers will be seeded with a stabilizing grass and a mix of native grasses and mulched with grain straw. Erosion control blankets (coir and/or Curlex) will be installed along all disturbed water/land interfaces. -The estimated 85 cubic yards of excavated spoils from the implementation of the channel will be replaced to its original site, firmly packed into place, seeded with a stabilizing grass, seeded with a mix of native grasses and forbs, and mulched.

MVP-2018-00741-EMN, Page 6 of 6

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