On this day in 1970, two years into the construction of the Westgate Bridge, a 112m span of bridge collapsed onto the ground and water below.
The collapse killed 35 construction workers and injured 18 - and it remains our worst-ever industrial accident.
Construction on the $202 million bridge started on April 22, 1968; after the collapse and a royal commission into the disaster, the bridge finally opened to traffic on November 15, 1978.
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