I was around the south shore of the lake recently, not far from where the Bluff Creek canal feeds into it. The lake has receded slightly, and to my surprise, the recession of the waters revealed what appeared to be a three-foot diameter iron conduit of some sort, showing about 100 feet of it from the normal edge of the lake to its disappearance under water.

Is there actually a sewer line going through Lake Hefner? If so, is this the only one? if not, what kind of pipes are or could be under the surface? I'd never considered their existence; I'd figured the only stray material there was the various flotsam deposited over the past 50 to 60 years.