Under the 140 bridge is not part of the state park. The park area is posted and there are fences put in place temporarily....although people have already torn down the signs and cut holes in the fence.

The park starts at the parking lot at the north end of the industrial area to the north of the 140 bridge and goes north. It's the southern end of the park that is closed off. (see above) There are sections of private property that are also closed off temporarily so look for those signs too.
The areas to the north and south of the 140 bridge are private property (where the factories are) so you can't go onto that property without permission above the high tide line.