The Glen Canyon Dam Final EIS analyzed baseline impacts of dam operations on downstream environmental and cultural resources from 1963 to 1990, and compared those baseline impacts to possible alternative operations of Glen Canyon Dam, including three alternatives that would provide steady flows from the dam and six alternatives that would provide various levels of fluctuating flows. The EIS team and the cooperating agencies identified a preferred alternative called: the Modified Low Fluctuating Flow Alternative. This EIS served as the culmination of the Glen Canyon Environmental Studies launched in the early 1980s to document the effects of Glen Canyon Dam on downstream resources, fulfilling one of the mandates of the Grand Canyon Protection Act of 1992.
ABSTRACT: This is the original cultural resources compliance document that was prepared in conjunction with the 1996 Environmental Impact Statement on the operations of Glen Canyon Dam. Broadly, it stipulated that cultural resources along the Colorado River corridor would be identified and evaluated for National Register eligibility, a Monitoring and Remedial Action Plan would be developed that would guide future monitoring activities and remedial actions necessary to address any adverse effects to historic properties that was identified through the monitoring. Finally, a Historic Preservation Plan was to be developed that would guide the long-term management of the historic properties under the 1994 PA. This document would incorporate all of the previous actions.
