The power plant originally operated on a peaking basis which caused large daily fluctuations in river flow, with sharp peaks in the daytime and extremely low flows at night. In 1992, the release patterns from the dam were placed under legal constraints due to a biological opinion to protect endangered fish species. In 2006 the release patterns were further modified under an "Action Alternative" designed by the U.S. Fish and Wildlife Service in order to mimic natural flows. The power plant now releases water based on the natural seasonal hydrograph of the Green River before damming. In addition, water flows must be maintained above at all times.