Loosing the Railroad Ranch

There has been a flurry of posts on various forums and blogs about possibility of the State of Idaho shutting down Harriman State Park in a effort to cut costs. If the park is shut down under the agreement by which the land was awarded to the state, the land reverts to the Harrimans.

While I think it a pretty bone headed and shortsighted move, would the park being shut down cut access to the river?

If I understand Idaho law, no. The river is navigable and the public would still have access rights to the normal high water mark. Easy access across the meadows and along the banks could potentially be eliminated, but I do think that access from Last Chance and from the Osborne Bridge would still be legal. As the public has used the banks for the last 25 years there could also possibly be a public easement along the banks.

If I am off in my thinking please correct me.