I went to look on Saturday. They have temporary reroutes on both sides with some new pavement in place for bikes/people. They've started building a curved berm on the south side of Higgins for the trail leading to the bridge. The overall trail will be a little shorter when finished, but they're also taking out one of the road crossings for the main parking lot entrance.
You can zoom in for the reroutes here:
http://www.strava.com/activities/81133393