In 1995, the final EIS was filed with EPA, again recommending a changed operation of the dam. The flood experiment of March 1996 which Secretary Babbitt started was conducted in accordance with the EIS process. The flows also fit within the intent of the Grand Canyon Protection Act of 1992, which provides for operation of Glen Canyon Dam for environmental purposes in Glen and Grand canyons in addition to traditional water and power generation benefits. Scientists conducting the flood experiment expected the high flows to redeposit sediment from the bottom of the river on the banks above the normal high water mark which has been limited to 20,000 cfs since August 1991, thus rebuilding the beaches. These beaches are vital to the establishment of native vegetation, which increases insect populations which in turn provides a strong food base for native fish and birds species.
Increased beaches provide for greater recreational value and protection of the cultural resources.
Also, it was hoped that the flows would serve to scour the backwaters that have silted in and restore critical habitat for the humpback chub, an endangered fish, and native fish species. Secretary Babbitt today released a summary of 34 separate draft scientific studies analyzing the flood. However, it was noted that the actual area of the beaches increased by only 5 to 7 percent. The flood created 82 new sand campsites along the river and destroyed 3. Campsites have been defined as areas which can accommodate up to 20 people.