DRAFT ENVIRONMENTAL IMPACT STATEMENT

Post-2026 Guidelines for operation of Hoover and Glen Canyon Dams (P26)  
Released on Friday January 9, 2026 (project website)

Public comments due on March 2, 2026

The Draft EIS will be published in the Federal Register on January 16, 2026, initiating a 45-day comment period that will end on March 2, 2026. Comments may be submitted via the following methods:

• Email to: crbpost2026@usbr.gov
• Telephone: (602) 609-6739
• Mail to: Bureau of Reclamation, Attn: BCOO-1000, P.O. Box 61470, Boulder City, NV 89006

Reclamation will hold two virtual public meetings to provide information on the Draft EIS:

• Virtual meeting — Thursday, January 29, 2026, at 1:00 – 3:00 p.m. Mountain time
• Virtual meeting — Tuesday, February 10, 2026, at 5:30 – 7:30 p.m. Mountain time

To register for a virtual public meeting, please go to the project website. The virtual public meetings will be available in Spanish.
 
For further information, contact the project team by email at crbpost2026@usbr.gov or call the project telephone line at (602) 609-6739.

NEWS

• December 19 2025 - Environmental groups & tribal leader decry Colorado River stalemate. By Tony Davis for AZ Daily Star.
• January 9, 2026 - Feds release plan for Colorado River if States don't strike a deal. By Ben Winslow for Fox 13, SL City.
• January 9, 2026 - With Upper/Lower Basin States still snagged, Feds give them more time to craft Colorado River plan. By Jeniffer Solis for Nevada Current.

DOCUMENTS

• All Documents Combined (2,190 pages and searchable)
• 00 - Executive Summary

• 01 - Volume One (Table of Contents)
• 02 - Chapter One (Need and Purpose)
• 03 - Chapter Two (Description of Alternatives)
• 04 - Chapter Three (Affected Environment & Consequences)
• 05 - Chapter Four (Consultation and Coordination)
• 06 - Chapter Five (Preparers and Partners)

Volume Two - Supporting Appendices

• 07 - Volume Two 
• 08 - Appendix A (CRSS Model Documentation)
• 09 - Appendix B (Modeling Conserved Water)
• 10 - Appendix C (Allocation and Distribution)
• 11- Appendix D (Sensitivity Analysis)
• 12 - Appendix E (Deep Uncertainty)
• 13 - Appendix F (Hydrologic Uncertainty)
• 14 - Appendix G (Initial Conditions)
• 15 - Appendix H (Demand Schedule and Unused Tribal Water)
• 16 - Appendix I (Upper Basin Demand)
• 17 - Appendix J (602a Storage)
• 18 - Appendix K (Deliveries to Mexico)
• 19 - Appendix L (Upper Basin Depletion Schedules)
• 20 - Appendix M (International Border Area)
• 21 - Appendix N (Lower Basin Depletion Schedules)
• 22 - Appendix O (Lake Powell Infrastructure)

Volume Three - Technical Appendices

• 23 -Volume Three
• 24 - Technical Appendix 3 (Hydrologic Resources)
• 25 - Technical Appendix 4 (Water Deliveries)
• 26 - Technical Appendix 5 (Geomorphology and Sediment)
• 27 - Technical Appendix 6 (Water Quality)
• 28 - Technical Appendix 7 (Air Quality)
• 29 - Technical Appendix 8 (Biological Resources)
• 30 - Technical Appendix 9 (Vegetation)
• 31 - Technical Appendix 10 (Terrestrial Wildlife)
• 32 - Technical Appendix 11 (Cultural Resources)
• 33 - Technical Appendix 12 (Paleontological Resources)
• 34 - Technical Appendix 13 (Tribal Resources)
• 35 - Technical Appendix 14 (Recreation)
• 36 - Technical Appendix 15 (Dams and Electrical Power)
• 37 - Technical Appendix 16 (Socioeconomics)
• 38 - Technical Appendix 17 (Population and Land Use)
• 39 - Technical Appendix 18 (Indian Trust Assets)
• 40 - Technical Appendix 19 (Visual Resources)

ADDITIONAL INFORMATION

The administrative record of 2007 Guidelines

The administrative record of 2012 Basin Study

A partial administrative record of 2019 to 2022 Drought Contingency Planning

The administrative record for 2023 Supplemental EIS for Glen Canyon Dam

The administrative record of 2024 Supplemental Interim Guidelines