A.H. Beck installs six drilled shafts socketed into dense shale foundation up to 10 feet in diameter and 135 feet deep completed off of barges for this project in Fort Pierre, South Dakota.
South Dakota Department of Transportation set out to replace the John C. Waldron Memorial Bridge built in 1962 that carries U.S. Highways 14 and 83, as well as S.D. Highway 34 over the Missouri River between Fort Pierre and Pierre. Jensen Construction contracted A.H. Beck to install six drilled shafts socketed into a dense shale foundation. The shafts were 2 to 10 feet in diameter and 135 feet deep. Drilling was completed from barges, reinforcing cages were fabricated on land and barged out, and the concrete was delivered to the drilled shafts from the existing bridge.