This is a solicitation for recurring and preventative maintenance, including an upgrade of the refrigeration system, at the Permafrost Tunnel Research Facility located at 2100 Steese Hwy, Fairbanks, AK. The required services over a 12-month period include annual de-winterization and winterization, weekly inspections, and responding to trouble calls and repairs. The performance start date is 15 April 2026. An escorted site visit is required during the solicitation period, and award will be based on best value, not just lowest price.