A.03.09 Plans (26RA007).pdf

This file is a plans document for the Lower Monumental Dam Powerhouse HVAC System Upgrade project. The document contains technical drawings and specifications for the modernized HVAC system installation at Lower Monumental Dam in Kahlotus, Washington, issued by the Department of the Army Corps of Engineers, Walla Walla District under Solicitation Number W912EF26RA007.

The project requires the design and installation of a comprehensive HVAC system utilizing river water as heating and cooling sources to ventilate, heat, and cool powerhouse spaces while enabling efficient pressurization to reduce smoke and dust infiltration. Key requirements include upgrading to a modern electronic control system operable from the control room, providing permanent access platforms for maintenance of system components such as mixed air plenum dampers and air filters, and ensuring the control room and stairwells are capable of being pressurized with clean outside air during fire events while maintaining adequate ventilation and comfort conditioning throughout occupied spaces. The procurement is issued as a Lowest Price Technically Acceptable (LPTA) firm-fixed price construction contract with 100% performance and payment bonds required. The NAICS code 238220 applies with a small business size standard of $19,000,000, and the procurement is unrestricted and open to both large and small businesses, with small business subcontracting plans required for large business offerors. Offerors must be registered in the System for Award Management (SAM) prior to award.