On 3 November 1909, the Lethbridge Viaduct over the Oldman River valley at Lethbridge, Alberta, was opened. It is long and, at its maximum, high, making it one of the longest railway bridges in Canada. In 1916, the CPR replaced its line through Rogers Pass, which was prone to avalanches (the most serious of which killed 62 men in 1910) with the Connaught Tunnel, an eight-kilometre-long (5-mile) tunnel under Mount Macdonald that was, at the time of its opening, the longest railway tunnel in the Western Hemisphere.