Denison's Ice Road

In savage blizzards, blinding whiteouts and 60-below-zero temperatures, steel axles snap like twigs; brakes and steering wheels seize up; bare hands freeze when they touch metal. The lake ice cracks and sometimes gives way, so the roadbuilders drive with one hand on the door, ready to jump.

John Denison and his crew waited for the coldest, darkest days of winter every year to set out to build a 520-kilometre road made of ice and snow, from Yellowknife in the Northwest Territories to a silver m…