March 12, 1857 A Great Western Railway train from Toronto to Hamilton ON plunges 60 feet into the frozen Desjardins Canal after the bridge collapses. A broken locomotive axle chewing through the crossties on the bridge weakened the structure, causing the collapse. Seventy persons die from trauma, drowning, or exposure. Only 20 passengers survive. (Some sources say 59 people killed in total, others put the date as March 17.)
