TWO workers have died, another is feared drowned and a fourth has life-threatening injuries in a spate of workplace accidents in Victoria.

The most recent workplace fatalities occurred in the space of 24 hours on Wednesday and Thursday and take to five the number of deaths in the state in the past 11 days.

A 26-year-old man died in hospital from his head injuries after a 150kg piece of machinery fell six metres on to him at a Campbellfield boat manufacturing business yesterday afternoon, a WorkSafe spokeswoman said.

Another man died after being struck by a street sweeper at a roadworks site in Bayswater North on Wednesday night.

And a search was continuing for a man feared drowned at a water treatment plant while carrying out routine sampling works yesterday morning.

A 37-year-old man also sustained life-threatening injuries in a separate incident in Laverton North yesterday, WorkSafe said.

He was working underneath a loading dock leveller doing service repair works when it fell and crushed his head, the spokeswoman said.

The latest incidents follow the deaths of a 73-year-old farmer gored by a bull, a 45-year-old man who fell to his death from a cherry picker, and a 46-year-old man who was crushed by a vehicle at a factory.

WorkSafe health and safety executive director Ian Forsyth warned employers against cutting corners to get jobs done ahead of Christmas.

"What we have seen in the last 10 days is a reminder of the bad old days," he told AAP.

Mr Forsyth said Victoria had an enviable workplace safety record.

"It is ironic that Victorian workplaces have never been safer," he said.

"They are the safest in the country."

In 1992, 38 people were killed in Victorian workplaces.

Last year, 23 died while so far this year 21 have been killed at work.

http://www.couriermail.com.au/ipad/spate-of-workplace-deaths-injuries/story-fn6ck4a4-1226211721965