Gulf Coast Electric Cooperative Inc., Wewahitchka, Florida, has been awarded a $16,581,850 modification (P00165) to a 50-year contract (SP0600-10-C-8253) with no option periods for the electric and water utility systems at Tyndall Air Force Base, Florida. This modification provides for the established annual inflationary adjustment to the contract’s electric and water utility service charges, including an adjustment to the increases in asset inventory, and incorporates the hourly inspection charge rate increase, as approved by the government. This is a firm-fixed-price with economic-price-adjustment contract. Location of performance is Florida, with a May 31, 2061, performance completion date. Using military service is Air Force. Type of appropriation is fiscal 2010 through 2061 Air Force operations and maintenance funds. The contracting activity is the Defense Logistics Agency Energy, Fort Belvoir, Virginia.