Excavate into earth embankment dam and emergency berm at the Caldwell outlet works to demo, remove and replace the existing concrete outlet structure. Work included installing sheet pile cut off wall, and new earth embankment section. Constructing, furnishing, and installing of deepwell dewatering system and new electrical supply system for gate operation in outlet works. Excavate the Nampa outlet conduit to construct a new conduit and toe drain pipe, modify the filter collar, and plug one conduit.
- Cost: $6,487,000
- Owner: Bureau of Reclamation
- Designer: Bureau of Reclamation
- Construction Period: 11/2007 - 02/2009