Why GCDAMP exists

In 1992 Congress passed the Grand Canyon Protection Act (GCPA), which mandated development of an environmental impact statement to evaluate the effects of Glen Canyon Dam on downstream resources. The Act also mandated the Secretary to “establish and implement long-term monitoring programs and activities that will ensure that Glen Canyon Dam is operated … to protect, mitigate adverse impacts to, and improve the values for which Grand Canyon National Park and Glen Canyon National Recreation Area were established…”

The US Department of Interior (DOI) published its Final Environmental Impact Statement on the Operation of Glen Canyon Dam in March 1995. In October 1996 it published its Record of Decision and in January 1997 Interior Secretary Bruce Babbitt signed a Notice of Establishment of the Glen Canyon Adaptive Management Work Group as a formal federal advisory committee. The GCDAMP has evolved over time into a complex, collaborative body of scientists and stakeholders and federal agency representatives, but its fundamental purpose remains to fulfill the mandates of the Grand Canyon Protection Act through research, monitoring, and advice to the Secretary of Interior.