A.02.11 Technical Specifications (Amend 0003).pdf

This is a Technical Specifications document (Amendment 0003) for the Lower Monumental Dam Powerhouse HVAC System Upgrade project located in Kahlotus, Washington. The solicitation (W912EF26RA007) is issued by the Department of the Army Corps of Engineers Walla Walla District as a Lowest Price Technically Acceptable (LPTA) Request for Proposal resulting in a single firm-fixed price construction contract. The procurement is unrestricted and open to both large and small businesses, with the NAICS code 238220 (Plumbing, Heating, and Air-Conditioning Contractors) and a small business size standard of $19,000,000. Large businesses must submit a small business subcontracting plan, and 100% performance and payment bonds are required.

The project requires design and installation of a modernized HVAC system that ventilates, heats, and cools powerhouse spaces using river water as both heating and cooling sources. Key requirements include efficient powerhouse pressurization to reduce smoke and dust ingress, adequate ventilation and comfort conditioning for occupied spaces, pressurization capability in the control room and stairwells to exclude smoke during fire events, and conversion to a modern electronic control system operable from the control room. The work also requires installation of permanent access platforms for maintenance of system components including dampers in the mixed air plenum and air filter replacement equipment. Offerors must register in the System for Award Management (SAM) prior to award consideration.