. . . Mt Storm in WV could get you to 100 ft, but it is no longer open unless you dive from a boat. (No shore access). . .
The old shore access was a little dangerous, anyway. You had to climb down a fairly steep slope, fully rigged up, just to get to the water. And while someone had gone in and put a couple concrete steps in, they were irregular, and didn't help much.
As for Mt. Storm itself, all of the local (within 2-3 hours) dive shops use it for their check out dives. It holds the "waste" water from the local power plant, and its fairly warm year round - I've seen people dive it in swim trunks. Plus, people have built up an area to dive through. There are four platforms, one at 25' down, two at 50', and one around 90'-100'. Navigation lines connect them all, and to several other manmade things to see (one's a motorcycle, deliberately submerged as a memorial).
There
were plans to submerge a school bus, too - but that may have fallen through. That was right around the time the lake was closed to us (temporarily), and one of the guys who was really gung-ho about the idea got busted for multiple felonies in the interim. So . . .
As for how deep the lake is, I've run into people who've made it down to about 112' (when the weather's right). However, visibility gets to be an issue. There's a lot of silt in the lake, and the catfish have learned that divers mean food . . . and not just from handouts (local divers often prank each other by slipping chunks of hot dog into each other's pockets). It is kind of fun to watch someone get mobbed by hundreds of catfish, though.
Mt. Storm is kind of in the middle of nowhere, though. Other than the power plant, and a gas station, its pretty much farm country. On the bright side, that means you can get really great produce, if you pass through at the right time of year. The last time I was there, I picked up some really great sweet corn from a roadside stand . . .
Edit: I just pulled it up on Google maps - Woodbridge is about 2.5 hours east of Mt. Storm. Or if you've heard of Deep Creek Lake (or the Wisp ski resort), Mt. Storm is about an hour south of there.