30 Dec 2024

NWO-2021-01961-PIE

Expiration date: 1/20/2025

The U.S. Army Corps of Engineers, Omaha District (Corps), is evaluating a permit application submitted by Westwood Professional Services to expand an existing open pit quarry that would impact wetlands. The applicant is proposing to expand an existing open pit quarry in Minnehaha County, South Dakota for the purpose of mining quartzite. The project would be located on 232.5 acres and consist of the realignment of an existing access road in the site and the realignment of 2,937 linear feet of an unnamed intermittent tributary to Split Rock Creek to facilitate access to the whole of the site for the open pit quarry. Mining is currently underway within the southern portion of the project area. The proposed project would result in impacts to 6,778 linear feet of jurisdictional stream and 10.52 acres of jurisdictional riparian wetlands adjacent to the stream corridor. Based on the available information, the overall project purpose is to provide quartzite aggregate for construction and transportation projects in the Sioux Falls, South Dakota region. The applicant’s project purpose, as stated in the application, is to mine the large quartzite deposits in the area to support future construction and transportation projects in the Sioux Falls, South Dakota region.

26 Nov 2024

NWO-2024-01309-PIE

Expiration date: 12/26/2024

The District Engineer has received a prospectus from the Sponsor titled, “Prospectus – Wink Meadows Mitigation Bank”, hereon referred to as the Prospectus. The Corps is soliciting comments on the Prospectus. The Prospectus described herein is not being proposed by the Corps, but by the Sponsor. The Corps will evaluate the Prospectus according to the requirements of the Mitigation Rule (33 CFR 332) to determine if the Prospectus has the potential to produce compensatory mitigation suitable to offset unavoidable impacts to waters of the United States authorized through the issuance of Department of the Army (DA) permits pursuant to section 404 of the Clean Water Act (33 U.S.C. 1344) and/or sections 9 or 10 of the Rivers and Harbors Act of 1899 (33 U.S.C. 401, 403). The Sponsor is proposing to develop a compensatory mitigation site within the Upper Big Sioux Geographic Service Area (GSA). If approved, the Mitigation Site would produce credits available to offset the loss of waters of the United States within the GSA. The Sponsor proposes to restore wetlands by diverting water to restore hydrology to the site and by reestablishing connection to the historic floodplain.

28 Oct 2024

Regional Streamflow Duration Assessment Methods for the Arid West, Western Mountains, and Great Plains

The U.S. Army Corps of Engineers (Corps) Albuquerque, Chicago, Detroit, Fort Worth, Galveston, Kansas City, Los Angeles, Omaha, Rock Island, Sacramento, San Francisco, St. Louis, St. Paul, and Tulsa Districts, and the U.S. Environmental Protection Agency (EPA), Regions 5, 6, 7, 8, and 9 jointly announce the availability of the Regional Streamflow Duration Assessment Methods (Regional SDAMs) for the Arid West, Western Mountains and Great Plains. The methods are rapid assessment tools for distinguishing between ephemeral, intermittent, and perennial streamflow at the reach scale for the Arid West, Western Mountains and Great Plains regions.