It seems that the time has come for us to cut our losses on the reservoir. As a civil engineer, I understand the benefits of having a reservoir, for recreation, water supply, and flood control. I also appreciate the immense effort that goes into designing, constructing, and maintaining dams. As a geologist, I understand that in the end, all reservoirs are doomed to failure, succumbing to the natural forces that created watercourses and canyons in the first place.
Consider that we really have no further need of the reservoir, as we have moved beyond the needs for which it was constructed in the first place.