Deer Flat Dam Outlet Works Rehabilitation

Excavate into earth embankment dam and emergency berm at the Caldwell outlet works to demo, remove, and replace the existing concrete outlet structure, install sheet pile cut off wall, new earth embankment section, and deepwell dewatering system. The new 40’ft tall intake tower includes an electrical supply system for operation of the new slide gates, and 200lf  of concrete encased  of 60” diameter welded steel pipe that is entirely .  Excavate the Nampa outlet conduit to construct a new conduit and toe drain pipe, modify the filter collar, and plug one conduit.

Location: Nampa, ID
Cost: $ 6,487,000
Owner: US Bureau of Reclamation
Designer: USBR
Construction Period: 11/2007 – 02/2009