Heart Butte Dam Modification Sources Sought Notice December 18, 2025 This announcement is being used for market research and advanced planning purposes. Proposals are not requested and will not be accepted from this Sources Sought Notice. THIS IS NOT A SOLICITATION FOR PROPOSALS AND A CONTRACT WILL NOT BE AWARDED AS A RESULT OF THIS NOTICE. In accordance with FAR 15.201 Exchanges with Industry Before Receipt of Proposals, the United States Bureau of Reclamation (Reclamation), Missouri Basin Regional Office, previously hosted an Industry Day Event for the Heart Butte Dam Safety of Dams Modification (HBSDM) project located near Elgin, North Dakota. Please see special notice number DOIRFB0240024 on sam.gov for additional information regarding the industry day previously held in relation to this Sources Sought notice. Heart Butte Dam Safety Modification (HBSDM) Project ¿ Scope of Work The Heart Butte Dam Safety Modification project encompasses a comprehensive suite of civil, geotechnical, and structural construction activities designed to enhance the long-term safety, stability, and performance of the dam infrastructure. The scope of work includes, but is not limited to, the following major components: 1. Dewatering and Unwatering Systems ¿ Design, installation, operation, and maintenance of temporary dewatering and unwatering systems to facilitate dry working conditions within the outlet works and adjacent excavation zones. ¿ Systems shall be capable of managing both surface water and groundwater inflows throughout all phases of construction. 2. Cofferdam Works ¿ Engineering design, construction, and subsequent removal of temporary cofferdams to isolate work areas from reservoir and tailwater influences. ¿ Cofferdams shall meet all applicable safety and hydraulic performance criteria and be coordinated with dewatering operations. 3. Foundation Void Remediation ¿ Injection grouting to fill and stabilize voids or discontinuities within the foundation materials, accessed from within the outlet works conduit. ¿ Grouting operations shall be performed using low-mobility or chemical grout, as specified, to ensure compatibility with existing geologic conditions. 4. Outlet Works Conduit Rehabilitation ¿ Selective demolition of deteriorated concrete sections using saw cutting and hydro-demolition techniques. ¿ Installation of temporary structural shoring to support conduit integrity during repair operations. ¿ Reinforcement repair and reconstruction of the conduit to restore structural capacity and hydraulic performance. 5. Jet Grouting Operations ¿ Execution of jet grouting from both interior and exterior access points of the outlet works conduit to improve ground strength and reduce permeability. ¿ Grouting shall be performed in accordance with engineered patterns and quality control protocols to ensure uniform treatment. 6. Embankment Excavation ¿ Controlled excavation of designated portions of the existing dam embankment to facilitate installation of new …