Canada utility seeks spillway, dam core drilling at 165-MW Seven Sisters hydro project

Canadian utility Manitoba Hydro seeks bids to perform core drilling on the spillway and concrete dam of the 165-MW Seven Sisters hydroelectric project in Manitoba. Bids are due June 5.

Manitoba Hydro called for bids May 20 for circuit breakers and switchgear modifications at Seven Sisters and the 479-MW Grand Falls project. It took bids in April for a broad range of civil engineering services to its dams, hydroelectric projects and other facilities in Manitoba.

Seven Sisters was built in 1952 on the Winnipeg River and includes six generating units.

Manitoba Hydro seeks bids for diamond core drilling to recover a 6-inch-diameter, 10-foot-long horizontal concrete core from eight locations of the downstream rollway of the spillways as well as a 2.5-inch-diameter, 65-foot-long vertical concrete and rock foundation core from two locations on the deck of the south non-over dam. Other work includes additional core drilling and inspection and testing of the cored holes. The work is to be completed by October 2014.

The solicitation may be obtained from the Canadian Public Tenders Internet site under Questions may be submitted until May 30.

To arrange a site visit, contact Glenn Ferguson, (1) 204-360-4501; Fax: (1) 204-360-6144; E-mail:

Bids are due by 4 p.m., Central time, June 5. For information, contact Manitoba Hydro, Purchasing Dept., P.O. Box 1287 STN MAIN, Winnipeg, MB R3C 2Z1 Canada; Fax: (1) 204-360-6130; E-mail:; Internet:


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