Dam: 2,720 cfs
Kirby: 3,390 cfs
Varney: 4,530 cfs
Just want to give everybody a quick heads-up that flows out of Hebgen Dam will likely be increasing over the weekend. We received a letter from PPL, and the long and the short of it is this:
“ ‘The excess precipitation this spring, around 150 percent of normal for the first half of June, combined with the large snowpack in the upper Madison River high country has the potential to result in a Hebgen Lake elevation above our federal operating license limit of 6,534.87 feet if we do not increase outflows,’ said Jon Jourdonnais, manager of hydro licensing and compliance for PPL Montana.
Jourdonnais said that, depending on weather patterns and the rate of projected runoff, PPL Montana will, over the next several days, adjust flows into the downstream Madison River to between 3,400 and 4,000 cubic feet per second at the Kirby U.S. Geological Survey gauge, on the river downstream of Hebgen.”