Environmental Impact Statements and Records of Decision

(6) results
1995 EIS on Glen Canyon Dam Operations
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 […]
2015 Runge, et al., Decision Analysis to Support Development of the Glen Canyon Dam Long-Term Experimental and Management Plan
1996 ROD on Glen Canyon Dam Operations Final EIS
The 1996 RoD formally adopted the preferred alternative from the 1995 EIS stipulating the Modified Low Fluctuating Flow Alternative for operating Glen Canyon Dam. It also initiated the Glen Canyon Dam Adaptive Management Program (GCDAMP) by establishing the Adaptive Management Work Group (AMWG) under the Federal Advisory Committee Act (FACA). AMWG’s stipulated purpose was to […]
1995 Operation of Glen Canyon Dam Colorado River Storage Project Arizona Final EIS
This final environmental impact statement (EIS) analyzes the impacts of operations from 1963 to 1990 (baseline conditions) and alternative operations of Glen Canyon Dam on downstream environmental and cultural resources of Glen and Grand Canyons. Alternative operations evaluated include three that would provide steady flows and six, including no action, that would provide various levels of fluctuating flows. Additional measures have been combined with the alternative operations, where appropriate, either to mitigate adverse impacts of the alternative or to enhance...