Lifton dam

[JR1]

They are walking on a stone walkway that is THREE feet above the Ford the bikers wanted to use to get back. and the walkway is now 8" under

Check the TIDE times next time you can see the sign on one side same on the other
You could hear the bikers swear when they came back an hour after crossing to the other side

You can just see the water over the walkway in the bikers shot

[Shadowman]

Difficult to see even when enlarged.