Corps plans to seek replacement transformers for 517.8-MW Garrison

The U.S. Army Corps of Engineers plans to seek bids for replacement transformers and site modifications at the 517.8-MW Garrison Dam project on the Missouri River in Garrison, N.D.

The Corps’ Omaha District hired L&S Electric in 2007 to retrofit governors at the hydroelectric project. (Hydro Review April 2007)

The Corps said it plans to issue a request for proposals in early February 2009 for the 115-kilovolt generator step-up transformer installation, with bids to be due about March 5.

Valued at between $2.5 million and $5 million, the work is to include removal of six single-phase 115-kV GSU transformers, reconstruction of the transformer deck to accommodate two new 115-kV three-phase GSU transformers, removal and replacement of the isolated phase bus, replacement of oil-filled high-voltage cables with solid-dielectric high-voltage cables, replacement of the generator neutral grounding system, installation of a transformer deluge and containment system, replacement of transformer controls and relaying, replacement of the annunciation system, and synchronization of potential transformers.

A sources sought notice may be obtained from the Federal Business Opportunities Internet site,, by entering solicitation No. W9128F10R0012 in the “Keyword/Solicitation #” box. Solicitation documents are to be made available on the Internet site. Prospective bidders must register at the Central Contractor Registration database,, and the On-line Representations and Certifications site,

Contractors interested in inspecting the worksite may contact Dale Evenson, (1) 701-654-7441, ext. 3220. For information, contact Donald D. Miller, Corps of Engineers, Omaha District, 1616 Capital Ave., Omaha, NE 68102-4901; (1) 402-995-2051; E-mail:

For more hydropower tenders, click here.

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