** EFFECTIVE MARCH 2, 2026: The government has posted Amendment No. 0002 hereunder this Notice (please refer to the Attachments Section). ** ** EFFECTIVE FEBRUARY 12, 2026: The government has posted Amendment No. 0001 hereunder this Notice (please refer to the Attachments Section). ** ** Under this Solicitation, the United States Army Corps of Engineers- Chicago District issues Solicitation No. W912P626BA016 for bidding purposes. PROJECT INFORMATION: The scope primarily includes removing the existing material on the upstream face of a stacked masonry stone wall, shotcrete, applying a waterproofing system, and replacing the material to the east and west of the Upper Appleton hydropower plant. The existing wall is roughly 150 years old and has had increased seepage over the past decade. It is founded on bedrock and +/- 20 feet tall. The rehabilitation includes about 365 feet west of the hydropower plant and 140 feet east of the hydropower plant. ACQUISITION INFORMATION: Competition for this acquisition is FULL AND OPEN, UNRESTRICTED TO BUSINESS SIZE. The North American Industry System Classification Code is 237990, with a small business size standard in dollars of $45 Million. The magnitude of cost for construction is estimated between $5,000,000.00 and $10,000,000.00. The requirement is for 439 calendar days. The solicitation IS downloadable from the internet only. The project specification files are PDF files and can be viewed, navigated, or printed using Adobe Acrobat Reader. Responses to this Solicitation (Invitation for Bids) are due by 2:00 p.m. (Central Time) on March 3, 2026. IMPORTANT POLICY: Contractors are REQUIRED to be registered in the System for Award Management (SAM) AT THE TIME ITS BID IS SUBMITTED to comply with the annual representations and certifications requirements. Registration can be completed free of charge at www.sam.gov. Contractors must register with sam.gov, prior to registering with the DoD Procurement Integrated Enterprise Environment (PIEE) system. Your firm must register with PIEE in order to access the solicitation and to place a bid in response to the upcoming USACE Solicitation. Use the PIEE System Registration link: ? https://piee.eb.mil and follow the instructions on their website. Request for Solicitation packages made by telephone, fax, or e-mail will not be honored. The Point of Contacts for this acquisition is Ericka Hillard at ericka.d.hillard@usace.army.mil, and Samantha Stiles at samantha.l.stiles@usace.army.mil. Please include Solicitation number W912P626BA016 on all correspondence. **