Albeni Falls Dam Main Unit Transformer Installation, Oldtown, Idaho

U.S. Army Corps of Engineers (USACE), Seattle District, requires installation of 3 recently manufactured transformers with a rating of 20 MVA, three-phase, and voltage class of 115 kV. These transformers are currently on-site, final movement and placement will need to be coordinated with the contractor who manufactured the units. Work will also need to be coordinated closely to complete concrete placement, transformer movements during work windows, scheduled outages, and seasonal weather. 

Remove and dispose of three existing three-phase GSU transformers and the associated neutral current transformers and surge arresters. Remove and dispose of three existing panelboards designated 440VAC Power Cabinet, 120VAC panelboard, and 120/240V panelboard. Provide two new panelboards designated 480VAC Power Cabinet and 120/240V panelboard. Remove and Provide new cables and conductors originating from the 440VAC power cabinet, and the 120VAC cabinet to the nearest point of termination. Remove cables originating from the 120VAC cabinet and Provide new cables to existing loads from new panelboard. Modify 15kV tubular bus to make connection with the new transformer bushings. Install oil containment, quench stone, and new transformer pads for each of the three new GSU transformers. Design of transformer support base, per contract drawings. Make external connections to new GSU transformers. Provide and install new neutral current transformers and surge arresters for each new GSU transformer. Remove three existing nitrogen cabinets and install Government Furnished nitrogen cabinets. Provide, install and commission Dissolved Gas Analyzer. Provide and install new MOD switch operator grounding pad and new switchyard tower lights.

See attached solicitation W912DW21R0021 for additional information.