I'll try to help you out a little, and if I'm in error, hopefully more knowlegable people on the site will help us both.
If you're heading upstream toward the dam, stay on the left side past Fall Creek. There is a pile of rocks under water at the mouth of fall creek that make it pretty shallow during no, or low, generation. After you have passed Fall Creek you will see a white house on the left. When you see the house, cut an angle across stream toward the boat ramp. When you reach the ramp area stick to that side past the condos and look for a rusty set of metal stairs in the weeds on the right bank. When you see the stairs, cut an angle toward the left bank and look for a log that kind of looks like an alligator with its mouth open. Head straigt for that log. When you get over to that side you're pretty safe to motor up to lookout. From there to the dam stay pretty much in the middle.
If there's no generation, or only one or two, be very careful. I've dinged more than one prop by not keeping a close eye on the bottom.
Hope this helps.