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24-Month Study Reports for Colorado River Operations

June 10, 2023
by John Weisheit

A 24-month report is a document from the Bureau of Reclamation which provides information about the conditions of main reservoirs in the Colorado River basin and projections for the near future. For instance, the report is essential for making a determination about operating criteria for shortage and surplus declarations.

VISIT THIS WEBPAGE For additional information on dam operations,

Upper Colorado River Basin Water Resources Division

Lower Colorado River Basin Water Resources Division

NEWS

REPORTS

MONTHLY RESERVOIR SUMMARY

ARCHIVE OF 24-MONTH REPORTS

January 24-Month Reports Only

24-MONTH REPORTS BY THE YEARS

  • The missing years: Reservoir elevations at Lake Powell are located HERE
  • Upper Basin historic reservoir operations are located HERE
  • Lower Basin historic reservoir operations are located HERE

2003

2004

2005 - Begin the development of Shortage Guidelines (Interim Guidelines)

2006

2007 - Conclude the development of Interim Guidelines

2008

2009

2010 - Begin the Supply and Demand "Basin Study" (not a NEPA Process)

2011 - Begin development of Long-Term Experimental and Management Plan for Glen Canyon Dam

2012 - End Supply and Demand "Basin Study (not a NEPA process)

2013

2014 - Begin the development of Drought Contingency Planning (not a NEPA process)

2015

2016

2017

2018 - Finish Tribal Water Basin Study & Develop 5-year projected future conditions

2019  - Conclude the development of Drought Contingency Planning (not a NEPA process)

2022

2023 - Begin reconsultation of 2007 Interim Guidelines

2024

2025

  • January; February; March; April; May; June; July; August; September; October; November; December

2026 - End Reconsultation of 2007 Interim Guidelines

  • January; February; March; April; May; June; July; August; September; October; November; December

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