The one he is thinking of is off of Red top mountain road. Next to the Yacht club. The way to get there driving is, cross Bethany bridge and go through the park. Just after you get out of the park hang a left at the first caution light and drive out that road until you see the closed off road on your right. Park at the gate and walk in. I haven't been out there in 2 years though, I sold my jet ski. I grew up jumping off of them, but the last time I was out that way they had signs up about jumping and I think they were issuing some pretty big fines.