Just talked with my pops. he and my mom are up for my graduation.
He told me that two things played into the canceling of the original plan to dredge a trench.
1. some group of people (don't know who) were against it and put up a fit. (the park service had ok'ed it and was ready to go)
2. The expected natural water rise
Now everyone is happy
environmentalists and all... or well, environmentalists are at least "happier." Draining the lake would make them happy ;)