Foster electrical reliability upgrades

THIS POST IS TO CORRECT THE NOTICE ID TO W9127N21R0060

Foster Dam and Powerhouse was constructed in the 1960s and most of the electrical equipment throughout the facility is over 40 years old. While there does not appear to be a standard expected design life for electrical equipment, the industry standard is 35 to 40 years. Some of the factors that affect the expected design life are equipment loading, maintenance, and environmental factors. As such, most of the electrical equipment in the Foster powerhouse should be considered for replacement. Replacement of the existing air blast main unit breakers; new station service equipment, new station service transformers, and new powerhouse motor control centers are recommended.

The U. S. Army Corps of Engineers (USACE), Portland District, requires a contractor to replace the existing 4160 V switchgear (including the original air blast main unit breakers with vacuum breakers); replace the existing 480 V double ended-switchgear (including new station service transformers); new powerhouse motor control centers; replacement of powerhouse 480 V CQ panels; the DC system (including new station battery); preferred AC equipment; related protection and controls; new wiring for power, protection, controls, annunciation and ancillaries.