Reports

On this page you will find various published reports from Interior Region 7 – Upper Colorado Basin. Those reports that are recurring are grouped together and listed chronologically, those that do not fall in to a grouped category are listed chronologically in the Miscellaneous Reports section.

  • Operating Reports
  • Project Reports
  • Annual Reports
  • Consumptive Uses and Loss Reports
  • Historic Resources Documentation
  • Miscellaneous Reports

Annual Reports on the Colorado River Basin Salinity Control Program

Publication Date Report Title
12/2020 Annual Report on the Colorado River Basin Salinity Control Program 2020 Link is to a PDF file

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Arizona Portion of the Upper Colorado River Basin - Consumptive Uses and Losses Reports

The Arizona portion of the Upper Colorado River Basin covers approximately 6,900 square miles in the north-east corner of Arizona. Except for Page, Arizona; a small area around Lees Ferry; and a portion of the Paria Plateau administered by the Bureau of Land Management; the study area lies entirely within the Navajo Nation.

Water is used for irrigation, municipal and industrial purposes, thermal electric power generation, livestock, fish and wildlife, and recreation. During the Retirement Period of the Navajo Generating Station (which began on December 23, 2019 and continues through December 22, 2024), the water usage will be no more than 1,500 acre-feet per calendar year.

The Colorado River Basin Project Act of 1968, Public Law 90-537, Section 601 (b)(1), dated September 30, 1968, directs the Secretary of the Interior to

"make reports as to the annual consumptive uses and losses of water from the Colorado River System after each successive five-year period, beginning with the five-year period starting on October 1, 1970… Such reports shall include a detailed breakdown of the beneficial consumptive use of water on a state-by-state basis."

Additionally, in compliance with Section 49 of the Navajo Project Participation Agreement dated September 30, 1969, which states in part:

"The Secretary of the Interior further agrees to make the reports required by Section 601 (b)(1) of Public Law 90-537 as they pertain to Arizona's Upper Basin uses annually rather than every five years. Within fifteen days following the completion of said reports, the Secretary of the Interior shall furnish copies of such reports to the Co-Tenants, the Navajo Tribe, each of the Upper Basin States, and the Upper Colorado River Commission."

These reports reflect the Department of the Interior's best estimate of actual consumptive uses and losses for each year within the Arizona portion of the Upper Colorado River Basin. The reliability of the estimates is affected by the availability of data and the current capabilities of data evaluation. The reports include a breakdown of the beneficial consumptive use by major types of use

Publication Date Report Title
07/01/2020 Consumptive Uses and Losses: Provisional Estimate, Arizona Portion of the Upper Colorado River Basin Report 2019 Link is to a PDF file
07/16/2019 Consumptive Uses and Losses: Provisional Estimate, Arizona Portion of the Upper Colorado River Basin Report 2018 Link is to a PDF file
09/28/2018 Consumptive Uses and Losses: Provisional Estimate, Arizona Portion of the Upper Colorado River Basin Report 2017 Link is to a PDF file
03/13/2018 Consumptive Uses and Losses: Provisional Estimate, Arizona Portion of the Upper Colorado River Basin Report 2016 Link is to a PDF file
02/15/2017 Consumptive Uses and Losses: Provisional Estimate, Arizona Portion of the Upper Colorado River Basin Report 2015 Link is to a PDF file
02/18/2016 Consumptive Uses and Losses: Provisional Estimate, Arizona Portion of the Upper Colorado River Basin Report 2014 Link is to a PDF file
10/01/2014 Consumptive Uses and Losses: Provisional Estimate, Arizona Portion of the Upper Colorado River Basin Report 2013 Link is to a PDF file
09/23/2014 Consumptive Uses and Losses: Provisional Estimate, Arizona Portion of the Upper Colorado River Basin Report 2012 Link is to a PDF file
09/24/2014 Consumptive Uses and Losses: Provisional Estimate, Arizona Portion of the Upper Colorado River Basin Report 2011 Link is to a PDF file

For more infomation about Arizona Portion of the Upper Colorado River Basin – Consumptive Uses and Losses Reports contact: Jim Prairie at jprairie@usbr.gov

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Colorado River System/Basin – Consumptive Uses and Losses Reports

The main stem of the Colorado River rises in the Rocky Mountains of Colorado, flows southwesterly about 1,400 miles and terminates in the Gulf of California. Its drainage area of 242,000 square miles in this country represents one-fifteenth of the area of the United States. Water is used for irrigation, municipal and industrial purposes, thermal electric power generation, mineral activities, livestock, fish and wildlife, and recreation. Large amounts are exported from the system to adjoining areas.

The Colorado River Basin Project Act of 1968, Public Law 90-537, directs the Secretary of the Interior to

"make reports as to the annual consumptive uses and losses of water from the Colorado River System after each successive five-year period, beginning with the five-year period starting on October 1, 1970. Such reports shall be prepared in consultation with the States of the lower Basin individually and with the Upper Colorado River Commission and shall be transmitted to the President, the Congress, and to the Governors of each State signatory to the Colorado River Compact."

These reports reflect the Department of the Interior's best estimate of actual consumptive uses and losses for each year within the Colorado River Basin. The reliability of the estimates is affected by the availability of data and the current capabilities of data evaluation.

The reports include a breakdown of the beneficial consumptive use by major types of use (except mainstream reservoir evaporation), by major tributary streams, and, where possible, by individual States.

Publication Date Report Title
08/2021 Provisional Upper Colorado River Basin Consumptive Uses and Losses Report: 2016-2020 Link is to a PDF file
10/2019 Provisional Upper Colorado River Basin Consumptive Uses and Losses Report: 2011-2015 Link is to a PDF file – October 2019 Revised report
2017 Upper Colorado River Basin Consumptive Uses and Losses Report: 2006-2010 Link is to a PDF file

For more infomation about Colorado River System/Basin – Consumptive Uses and Losses Reports contact: Jim Prairie at jprairie@usbr.gov

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Historic Resources Documentation

Publication Date

Report Title

02/2021 Level II Documentation of a Segment of the Government Highline Canal (5ME4676.41) in Mesa County, Colorado Link is to a PDF file
12/2020 Level II Documentation of A Portion of The Stewart Ditch (5DT1832.10), Delta County, Colorado Link is to a PDF file
11/2020 Level II Documentation of a Portion of the North Delta Canal (5DT1738.6), Delta County, Colorado Link is to a PDF file
10/2020 Level II Documentation of the Ratliff and Root Ditch (5MT23092), Montezuma County, Colorado Link is to a PDF file
01/2020 Level II Historic Documentation of the Aspen Canal (5DT1584) Delta County, Colorado OAHP #DT.R.R32 Link is to a PDF file
11/2019 Level II Historic Resource Documentation Gould Canal Segments 5DT2146.1 and 5MN10747.4 Montrose and Delta Counties, Colorado Link is to a PDF file
07/2019 Crawford Clipper Ditch Company: Level II Historic Resource Documentation of the Crawford Clipper Ditch—Spurlin Mesa Lateral (5DT1811.6), Delta County, Colorado Link is to a PDF file
01/2019 Level II Documentation of the Grand Valley Diversion Dam Work Complex (5ME12482) in Mesa County, Colorado Link is to a PDF file
03/2018 Summary Report of the Level I Documentation of the Uncompahgre Valley Water Users Association's GK, EU, EO, and GB Laterals in Delta and Montrose Counties, Colorado Link is to a PDF file
03/2018 Fire Mountain Canal Segment 5DT1277.4 and Leroux Creek Ditch Segment 5DT2005.3 Level I Historic Resource Documentation Delta County, Colorado Link is to a PDF file
03/2018 Summary Report of the Level I Documentation of One Segment of the Government Highline Canal, Mesa County, Colorado Link is to a PDF file
05/2017 Summary Report of the Level I Documentation of the Duke Ditch (5DT2083.1), Delta County, Colorado Link is to a PDF file
05/2017 Summary Report of the Level I Documentation of the Cattleman's Ditch, Montrose County, Colorado Link is to a PDF file
03/2017 Summary Report of the Level I Documentation of the Orchard Ranch Ditch, Delta County, Colorado Link is to a PDF file
03/2017 Summary Report of the Level I Documentation of Segments of the Grand Valley Canal, Mesa County, Colorado Link is to a PDF file

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Reports to Congress – Operations of Glen Canyon Dam

Publication Date

Report Title

06/2020 Report to Congress - Operations of Glen Canyon Dam - Pursuant to the Grand Canyon Protection Act of 1992 - Water Year 2018-2019 Link is to a PDF file | Transmittal Letters from the Secretary Link is to a PDF file
08/2018 Report to Congress - Operations of Glen Canyon Dam - Pursuant to the Grand Canyon Protection Act of 1992 - Water Year 2017-2018 Link is to a PDF file
09/2017 Report to Congress - Operations of Glen Canyon Dam - Pursuant to the Grand Canyon Protection Act of 1992 - Water Year 2016-2017 Link is to a PDF file | Transmittal Letters from the Secretary Link is to a PDF file
09/2016 Report to Congress - Operations of Glen Canyon Dam - Pursuant to the Grand Canyon Protection Act of 1992 - Water Year 2015-2016 Link is to a PDF file
08/2015 Report to Congress - Operations of Glen Canyon Dam - Pursuant to the Grand Canyon Protection Act of 1992 - Water Year 2014-2015 Link is to a PDF file

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Miscellaneous Reports

Publication Date Report Title
12/2020 Review of the Colorado River Interim Guidelines for Lower Basin Shortages and Coordinated Operations for Lake Powell and Lake Mead Link is to a PDF file and Appendix A – Operational Documentation for Lake Powell and Lake Mead Operations Under the Colorado River 2007 Interim Guidelines Years 2008 to 2019 Link is to a PDF file
05/2020 Rio Grande Water Surface Elevation Changes in the Los Lunas Reach Link is to a PDF file
02/2020 Taos Indian Water Rights Settlement Mutual-Benefit Projects NEPA Compliance - Public Scoping Report Link is to a PDF file
02/2020 Lake Powell Pipeline Project - Public Scoping Report Link is to a PDF file
02/2019 Zero Liquid Discharge Demonstration Project Final Report Link is to a PDF file
02/2019 Peer Review and Information Quality Plan for the Paradox Valley Environmental Impact Statement Link is to a PDF file
01/2019 Environmental Evaluation - The Allowance of the Installation of Sixteen Boat Slips at the Navajo Lake Marina, Navajo Unit, New Mexico - Supplemental Information Report
12/2018 Paradox Valley Unit 2nd Well Design Final Report
12/2018 Isleta to San Acacia Hydraulic Modeling Report

For more infomation about Miscellaneous Reports contact ucrnepa@usbr.gov

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Last updated 10/25/21