Renovation of a military facility in Tenkiller, Oklahoma. Conceptual plans call for the renovation of a military facility.

This market research seeks information from interested firms regarding the replacement of three existing 15kV switchgear lineups for generator breakers and station service transformer feeder breakers at Lake Tenkiller, Oklahoma. Work includes removal of the existing 500 kVA 13.8kV/480V station service transformer, removal of existing 15kV switchgear and breakers beneath the control room, removal of 480V station service switchgear in the control room, and removal of existing 15kV cables to the switchyard, including associated potheads and asbestos cable trays in the cable tunnel. Work further includes installation of new 15kV cables to the switchyard, new potheads for cable transitions to the switchyard bus, and new cable trays in the cable tunnel. The scope includes installation of front-accessible double-ended 480V switchgear beneath the control room with feeder circuit breakers and installation of 15kV switchgear equipped with new vacuum circuit breakers and redundant 500 kVA 13.8kV/480V high-resistance grounded wye station service transformers. The project diesel generator shall be reconfigured to a wye-grounded configuration with a high-resistance grounding resistor. Additional work includes providing new control and annunciation wiring for both 480V and 15kV switchgear where existing cables cannot be reused, modifications to protective relay settings and installation of new protection relays for station service feeders, automatic transfer functionality for 480V switchgear main and tie breakers with local arc flash mitigation switches, and replacement and relocation of the existing lighting transformer. The estimated construction price range is between $1,000,000 and $5,000,000 and the applicable NAICS code is 238210 with a $19M small business size standard. The Method of Contractor Selection has not been determined at this Time. *The value for this project is based on a financial range. The value is listed as the highest possible cost from the range provided by a stakeholder or official project document.