Oklahoma City Water Utilities Trust, Oklahoma City, Oklahoma, has been awarded a $100,589,044 modification (P00005) to a 50-year contract (SP0600-20-C-8331) with no option periods for the ownership, operation and maintenance of the water and wastewater utility systems at Tinker Air Force Base, Oklahoma. This is a regulated tariff type contract. Location of performance is Oklahoma, with an Oct. 31, 2071, performance completion date. Using military service is the Air Force. Type of appropriation is fiscal 2022 through 2072 Air Force operations and maintenance funds. The contracting activity is the Defense Logistics Agency Energy, Fort Belvoir, Virginia.