Eastern Sierra Serving the Eastern Sierra’s structural engineering needs since 2007 In Mono County: Mammoth Lakes, June Lake, Crowley Lake, Tom’s Place, Sunny Slopes, Lee Vining, Mono City, Benton, Bridgeport, Walker, Coleville In Inyo County: Bishop, Big Pine, Lone Pine, Independence, Lake Sabrina, Chalfant Valley, Wilkerson, 40 Acres, Bishop Creek