A Manitoba community is getting concrete weights ready to place on its bridge to prevent a rising river from lifting the deck and carrying the structure away.

An ice jam has formed south of the community where the Waterhen River enters Lake Manitoba.

Waterhen mayor Larry Chartrand says an engineer with Manitoba Infrastructure and Transportation has warned if the water rises above the bridge deck, it will float.

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An excavator works on dike breach in floodwater along South Waterhen Road. ((Waterhen Community Council))

So far three homes and one business have been evacuated.

This is the fourth time in six years that the Waterhen River has flooded in November due to ice jams.

About 180 people live in the community, 270 kilometres northwest of Winnipeg.