The Government plans a single firm-fixed-price construction contract for roof replacement at the Dworshak Powerhouse in Ahsahka, Idaho, covering the powerhouse and ancillary roofs by removing the existing roofing to the structural decks and installing a new fully adhered EPDM assembly with gypsum sheathing, vapor retarder, polyisocyanurate insulation, and cover board, supported by 2-year installer and 30-year manufacturer warranties. The scope also includes FRP fall-protection guardrails, fabricated metal stairs replacing ladder access, and replacement of the elevator machine room AC with a split heat pump, with cranes/boom lifts required and constrained by high-voltage equipment and overhead transmission lines. The procurement is unrestricted, open to large and small businesses, with a small business subcontracting plan required for large businesses and 100% performance and payment bonds required; NAICS is 238160 with a $19 million average annual receipts size standard. The solicitation is expected to post to SAM.gov on or about mid-to-late October 2026, a site visit will be offered about two weeks after posting, award is anticipated in January 2027, and foreign nationals should request site-visit clearance about four weeks in advance. The contractor must comply with EM 385-1-1 and manage safety, quality, submittals, and reporting through an on-site SSHO, CQC System Manager, and Government-furnished RMS/QCS.