Upper Diamond Fork Tunnel and Pipeline Design/Build, Phase 2
JV Project: Obayashi Corporation & W.W. Clyde & Co.
18,000' of 12'6" bored TBM water tunnel in rock (sandstone, siltstaone), and cut & cover pipeline excavations for 8' dia. steel pipe (6,500') and RCP (2,000'), at depths of 20' to 40' and slopes up to 15 degrees. A 700' deep shaft and a drill & blast underground flow control chamber 30'w x 40'h x 90' long. Irrigation.