John Day Dam Powerhouse HVAC Upgrades

The U.S. Army Corps of Engineers (USACE) Portland District (NWP) has a requirement for HVAC upgrades at the John Day Dam (JDA) Powerhouse. JDA is approximately 109 miles east of Portland, Oregon, and 275 miles from Seattle, Washington. JDA spans two states, with Units 1�14 located in Sherman County, Oregon, and Units 15�16 in Klickitat County, Washington. CMMC: Contractors are advised that Cybersecurity Maturity Model Certification (CMMC) Level 2 (Self) certification is required prior to obtaining the contract drawings containing CUI and prior to contract award. Solicitation documents may be restricted to only those offerors who demonstrate current CMMC Level 2 (Self) compliance. Prior to receiving solicitation documents with CUI, offerors must affirm their CMMC status to maintain eligibility; failure to meet this requirement will result in elimination from further consideration. CMMC requirements apply to prime contractors and subcontractors throughout the supply chain at all tiers that will process, store, or transmit any FCI or CUI on contractor information systems in the performance of this DoD contract or subcontract. Prime contractors shall comply and shall require subcontractors to comply with and to flow down CMMC requirements, such that compliance will be required throughout the supply chain at all tiers with the applicable CMMC level and assessment type for each subcontract as follows: If a subcontractor will only process, store, or transmit FCI (and not CUI) in performance of the subcontract, then a CMMC Status of Level 1 (Self) is required for the subcontractor. If a subcontractor will process, store, or transmit CUI in performance of the subcontract, then a CMMC Status of Level 2 (Self) is the minimum requirement for the subcontractor. Summary of Work: Work includes but is not limited to the following: Complete replacement of the primary and installation of secondary chillers on two chilled water loops serving the majority of the Powerhouse galleries. Demolition and removal of the existing system and installation of four new chiller skid packages totaling approximately 600 tons of refrigeration capacity. New electrical feeds, chilled water pumps, piping, and air handler units, with selective reuse of existing components. Systems must be integrated into a new automated digital HVAC control system. Half of the new systems will be water-cooled; half will be converted to air-cooled. For the air-cooled units, roof-mounted air-cooled condensers will be installed, requiring roof penetrations, piping, and building modifications. HVAC upgrades include new intake and exhaust ducting to prevent smoke propagation through the building in the event of fire, and fire protection measures at all penetrations. HVAC and the building fire protection systems must be fully integrated, replacing all existing pneumatic controls with an integrated digital control system which is capable of functioning to selectively shut down the HVAC to isolate sectors in the event of a fire or smoke event. The work includes mechanical and controls provisions for free cooling using passive outside air during cold nights and modifications to existing intakes, louvers, and penetrations to support smoke ventilation. Localized HVAC units such as mini-splits will be installed for specific spaces, with new electrical supplies, piping, insulation, penetrations, and data reporting to the central HVAC control system. Work will be performed in an active, operational Powerhouse with 6000A, 13.8kV busbars and other heavy electrical equipment, including areas below headwater with nuisance water intrusion risks. Certain pumps must remain operational throughout construction, presenting noise and safety hazards that must be managed. The existing fire suppression system must remain active during construction and be recommissioned upon project completion. Work includes ductwork installation and protection of floor penetrations in close proximity to operational high-volta…