This Solicitation is an unrestricted full and open competitive acquisition using the Federal Acquisition Regulation (FAR) Subpart 36.3, Two-Phase Design-Build Selection Procedures, and FAR 15.101-1, Tradeoff Source Selection Process (i.e., Best Value Tradeoff). One Solicitation will be issued for the acquisition during Phase One, pursuant to FAR Subpart 36.3. The solicitation will then be amended for Phase Two, pursuant to FAR 36.3 and FAR 15.101-2 best-value tradeoff (BVTO) source selection process. A firm fixed-price (FFP) with economic price adjustment type contract will be awarded for the project titled Albeni Falls Dam (AFD) Fish Passage Facility (FPF) in Oldtown, Idaho.