four jet tubes at the bottom of glen canyon dam allow the release of water when necessary - 山峽國家休養區 個照片及圖片檔
bucket (holds 24 tons) used to pour concrete in building the glen canyon dam, arizona,usa - 山峽國家休養區 個照片及圖片檔
close-up of cable that carried heavy equipment, concrete and generator parts in building the glen canyon dam and powerplant - 山峽國家休養區 個照片及圖片檔水壩
a 15 feet diameter original hydroelectric power plant turbine on display -glen canyon dam, arizona - 山峽國家休養區 個照片及圖片檔