Shots of freighters moored to sides of frozen Lachine Canal. Shot of crane loading ships with coal instead of steel, which weight complicated movement of ship in frozen canal. MS of ice-encrusted lock gates, PAN to Squat Lake freighter "Westcliffe Hall" inching her way through ice. CU of lower part of ice-covered lock gates, water seeping through. LAS of the "Westcliffe Hall" superstructure, TILT DOWN to man poking at tightly packed ice alongside hull. Several shots of tugboat "Sinmac" manoeuvering behind freighter, nosing to freighter's stern and shoving with all her might. Shot of steam, turbulence in water as tugboat's screws strain at their job. LS of several cranes at work unloading ships of their heavy cargo, loading them with coal instead. LSs of ships in harbour, ice closing in, of ships at docks being unloaded. LAS of skipper of one of the freighters on his bridge. Shot of tugboat butting its way through freezing slush in canal, men wielding steel tipped pike-poles in effort to chip away ice from canal lock gate. (00/12/1958)