Kirkham Bridge - What's the true story?

I was advised by the BCCT that Transurban intends to demolish the Kirkham road bridge.
However this is in direct contravention of the M2 Upgrade Environmental Assessment issued by the NSW Roads and Traffic Authority which specifically states:
Kirkham Street/Kirkham Street Bridge "During construction there would be one of two footpaths closed for the lengthening works at the each end. Temporary road crossing may be used to facilitate access."
That is hardly consistent with their newly reported intention to demolish the bridge and spend "at least six months" rebuilding it!