2023-22077: Notice of Intent To Prepare a Supplemental Environmental Impact Statement for the December 2016 Record of Decision Entitled Glen Canyon Dam Long-Term Experimental and Management Plan

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Summary

On June 6, 2023, the Secretary of the Interior's Acting Designee to the Glen Canyon Dam Adaptive Management Work Group (AMWG), a Federal advisory committee, directed the Bureau of Reclamation (Reclamation) to prepare a Supplemental Environmental Impact Statement (SEIS). The supplement is to the December 2016 Record of Decision for the Glen Canyon Dam Long-Term Experimental and Management Plan (LTEMP) Final Environmental Impact Statement and will analyze flow options to prevent smallmouth bass and other warmwater invasive nonnative fish from establishing below Glen Canyon Dam (by preventing additional spawning) and will analyze new information regarding the sediment accounting window associated with the LTEMP High-Flow Experiment (HFE) protocol.

The agency’s own summary, as published.

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