Big Bend Lower Brule North Ecosystem Restoration, Element 1 Phase 2, Lower Brule, SD

The U.S. Army Corps of Engineers Engineering District Omaha is soliciting competitive sealed bids for the Big Bend Lower Brule North Ecosystem Restoration Project, Element 1 Phase 2, located in Lower Brule, South Dakota. This construction project involves ecosystem restoration activities including the construction of a 100-foot-wide riparian planting bench, gravel maintenance path, stone-toe revetment, and a 920-foot-long L-head dike to protect a 2.12-acre peninsula, which will create approximately 3.75 acres of emergent wetland and 17 acres of riparian habitat. Key contract requirements include mandatory attendance at a pre-bid site visit on November 24, 2025, submission of comprehensive safety and environmental protection plans, compliance with Davis-Bacon Act wage requirements and Executive Order 14026 minimum wage provisions, and adherence to extensive governmental safety regulations including antiterrorism and operations security requirements. The contract will be awarded to the lowest responsive bidder meeting all technical specifications and requirements outlined in the solicitation and amendments. Critical deadlines include the original bid due date of December 17, 2025, extended to December 19, 2025 at 2:00 PM Central Time, with contractor questions required to be submitted through the ProjNet Bidder Inquiry system by December 2, 2025.

This solicitation is designated as a 100% small business set-away, restricting eligibility to certified small business concerns. The estimated contract value ranges between $10,000,000 and $25,000,000, with eleven competitive bids received ranging from approximately $8.2 million to $14.9 million. The project schedule requires completion within 450 calendar days from the Notice to Proceed. Major line items include L-head breakwater structure placement, mobilization and demobilization, stone riprap placement, excavation (cut and fill operations), borrow source material, loamy topsoil material, aggregate surface course, and culvert pipe placement, with estimated quantities including 115,000 cubic yards of excavation fill and 9 culvert pipes. Performance will take place in Lower Brule, South Dakota, with contractors required to maintain a 20% bid guarantee, obtain performance and payment bonds, and comply with a 4.5% Tribal Employment Rights Ordinance tax assessment on 48.77% of the contract award amount.