Solar Array A new 350 kilowatt-hour solar array was installed near the Hill Aerospace Museum at Hill Air Force Base, Utah, June 25, 2021. Rocky Mountain Power built the array and will own and operate it for the next 25 years as part of its Blue Sky program. The base will add the energy generated to its power grid. SHARE: Download: Full Size (3.8 MB) Credit: Cynthia Griggs, Hill Air Force Base VIRIN: 210625-F-EF974-1004Q.JPG Photo Gallery