Wilmot River walks are currently affected by high water levels due to spilling from the Lake Gairdner dam. Hydro have a maintenance operation on the tunnel which will make spilling more prevalent for a while, coupled with the higher rainfall and snow of late.
End result is that the river is far too high to cross. Lucy's Track on the east bank is in good order if you want a pleasant stroll.
If I get more information from Hydro on the engineering works, which are of course a necessary part of operations, I will post it.