POSSIBLE severe weather could derail plans to open the Matagarup Bridge to pedestrians in May as planned, according to Transport and Planning Minister Rita Saffioti.
The first of four arches was craned into place today in "a big step in the construction" of the pedestrian bridge that will connect Optus Stadium and East Perth.
The other arches will be hoisted into place in April, with the deck to follow in May.
Ms Saffioti said staff was working around the clock to have the bridge open in time for football season, but bad weather could slow things down.
"We are currently looking good (to open) for the end of May," she said.
Ms Saffioti said the river would be closed from April 4, as planned, with negotiations taking place with ferry and cruise operators.
"Main Roads and the Department of Transport are working with the commercial users to negotiate alternative plans," she said.
She said the closures would be in place for up to eight weeks.