Mortenson was selected to construct two of the world's largest solar facilities located in Rosamond, California. Solar Star I & II span over 3,200 acres across two counties. Mortenson built the foundations, trackers, civil site work and oversaw general site management. The civil component includes caisson installation and 85 miles of road construction. SunPower provided all system components using their Oasis™ Power Plant Technology and 1.7M solar modules.