USA
Utah
Washington County Water Conservancy
Massive trench-cut foundation
Approximately 5,800 cy (4,400 m) per day maximum RCC placement, conveyor delivered
Vertical cast-in-place upstream face
The project involved constructing a new RCC dam, beginning in a 60 foot vertical, stepped cutoff trench. The dam replaced an earth dam which failed in 1989, partially due to difficult foundation conditions. Features of the project included extensive sedimentary, gypsum seamed, foundation preparation; leveling and dental concrete; placement of the new dam installation of 72" steel pipe, outlet works, intake tower and gates. All work was completed within a six month period.
Type of Dam: RCC, gravity
Height: 138 feet; 40 m
Crest Length: 2,100 feet; 640 m
RCC Volume: 170,000 cy; 130,000 m3
Conventional Concrete: 22,400 cy; 17,100 m3