The waters near the Siberian shore -- when free of ice -- are too shallow for giant cargo ships, and the infrastructure needed for navigation has deteriorated. But a study conducted from 1993 to 1999 by researchers from Russia, Norway and Japan found that a route once sustained by Soviet diktat could also be viable for private enterprise.

There is, of course, a third Arctic shipping route besides the Arctic Bridge and the Northern Sea Route: the Northwest Passage. It would be the last of the three main routes to succumb to the thaw. But some Canadian officials, eyeing what will happen in 20 years, say it is all the more justification for investing in the rebirth of Churchill.

"We're gearing up for the future," said Mr. Lemieux, the Manitoba transportation minister. "We look to be the gateway, the logistical hub of the world for circumpolar navigation."

A lucky winner would be Pat Broe, the American who bought the Port of Churchill in 1997 almost as an afterthought, for a token $10 Canadian. Looking to expand his railroad company, OmniTrax, he had already paid $11 million for 810 miles of denationalized tracks in Manitoba. He acquired the port at auction, figuring he would rather own it than have someone else use it as a "toll booth" for his railroad.

Mr. Broe, a private man, declined to be interviewed for this article.

Since his acquisitions, OmniTrax estimates it has spent $50 million modernizing the port to accommodate big ships carrying exports like grain and farm machinery to Murmansk, and incoming Russian products, including fertilizer and steel. By some hopeful estimates, Churchill's shipping season could eventually grow to 8 or even 10 months a year, compared with the current 4.

Michael J. Ogborn, OmniTrax's managing director, said he could see a future for Churchill when "the activity at the port will be as busy as an anthill, with machines, people, freight and ships at dock."

For now, though, there is a problem. While the port has continued to ship grain to Europe and North Africa, it is still waiting for its ship to come in -- any ship from Russia, to demonstrate the advantages of the Arctic Bridge.