Interim Guidelines - Revision history

Cellsworth at 20:53, 21 August 2026

2026-08-21T20:53:09Z

Cellsworth at 20:42, 21 August 2026

2026-08-21T20:42:37Z

Cellsworth at 20:41, 21 August 2026

2026-08-21T20:41:33Z

Cellsworth at 22:30, 9 June 2025

2025-06-09T22:30:00Z

Cellsworth at 16:02, 10 January 2025

2025-01-10T16:02:44Z

Cellsworth at 16:51, 23 August 2024

2024-08-23T16:51:13Z

Cellsworth at 21:30, 1 April 2024

2024-04-01T21:30:37Z

Cellsworth at 21:29, 1 April 2024

2024-04-01T21:29:46Z

Cellsworth at 20:25, 20 November 2023

2023-11-20T20:25:01Z

Cellsworth at 21:01, 12 October 2023

2023-10-12T21:01:16Z

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 Several reservoir and water management decisional documents and agreements that govern the operation of Colorado River facilities and management of the Colorado River are scheduled to expire at the end of 2026. These include the 2007 Colorado River Interim Guidelines for Lower Basin Shortages and Coordinated Operations for Lake Powell and Lake Mead (2007 Interim Guidelines), the 2019 Drought Contingency Plans, as well as international agreements between the United States and Mexico pursuant to the United States-Mexico Treaty on Utilization of Waters of the Colorado and Tijuana Rivers and of the Rio Grande (1944 Water Treaty).

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-! <h2 style="margin:0; background:#cedff2; font-size:120%; font-weight:bold; border:1px solid #a3b0bf; text-align:left; color:#000; padding:0.2em 0.4em;">2007 Interim Guidelines</h2>
+! <h2 style="margin:0; background:#cedff2; font-size:120%; font-weight:bold; border:1px solid #a3b0bf; text-align:left; color:#000; padding:0.2em 0.4em;">Supplemental Environmental Impact Statement for Near-term Colorado River Operations </h2>
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-! <h2 style="margin:0; background:#cedff2; font-size:120%; font-weight:bold; border:1px solid #a3bfb1; text-align:left; color:#000; padding:0.2em 0.4em;"> Update </h2>
+! <h2 style="margin:0; background:#cedff2; font-size:120%; font-weight:bold; border:1px solid #a3bfb1; text-align:left; color:#000; padding:0.2em 0.4em;"> 2007 Interim Guidelines </h2>
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-==[https://www.usbr.gov/ColoradoRiverBasin/post2026/pre-scope/index.html Pre-Scoping]==
+==2007 Interim Guidelines Purpose and Need==
-To help develop operating strategies for post-2026, Reclamation published a Federal Register Notice on June 24, 2022 asking for public input in two specific areas:
+The purpose of the proposed federal action is to:
-*Suggested mechanisms for the anticipated NEPA process(es) to ensure that a wide range of Basin partners, stakeholders, and the general public can meaningfully engage and participate in the development of post-2026 operational strategies
+The proposed federal action is needed for the following reasons:
-*Potential substantive elements and strategies that should be considered for post-2026 operations and considered in the anticipated upcoming NEPA process(es)
+*the Colorado River is of unique and strategic importance in the southwestern United States for water supply, hydropower production, flood control, recreation, fish and wildlife habitat, and other benefits. In addition, the United States has a delivery obligation to the United Mexican States (Mexico) for certain waters of the Colorado River pursuant to the February 3, 1944 Treaty between the United States and Mexico Relating to the Utilization of the Waters of the Colorado and Tijuana Rivers and of the Rio Grande (1944 Treaty);
+*the eight-year period from 2000 through 2007 was the driest eight-year period in the 100year historical record of the Colorado River; this drought in the Colorado River Basin has reduced Colorado River system storage, while demands for Colorado River water supplies have continued to increase. From October 1, 1999 through September 30, 2007, storage in Colorado River reservoirs fell from 55.8 maf (approximately 94 percent of capacity) to 32.1 maf (approximately 54 percent of capacity), and was as low as 29.7 maf (approximately 52 percent of capacity) in 2004. This drought was the first sustained drought experienced in the Colorado River Basin at a time when all major storage facilities were in place, and when use by the Lower Division states met or exceeded the annual “normal” apportionment of 7.5 maf pursuant to Article II(B)(1) of the Consolidated Decree. These conditions, among other factors, led the Department to conclude that additional management guidelines are necessary and desirable for the efficient management of the major mainstream Colorado River reservoirs;
-The purpose of the Notice was to receive input on the process and substantive elements for post-2026 operations prior to the anticipated initiation in early 2023 of a formal process pursuant to the National Environmental Policy Act (NEPA). Reclamation was particularly interested in receiving specific recommendations that recognize the need for robust policies that withstand a broad range of future conditions and are not based on a single set of assumptions about water supply and demand; the current and emerging operational challenges resulting from low runoff conditions; and the need for engagement and inclusivity, including all Basin tribes and Mexico, in Colorado River decision-making processes.
+*in the future, low reservoir conditions may occur more frequently due to drought periods and anticipated future demands on Colorado River water supplies;
+*as a result of actual operating experience and through reviews of the LROC and preparation of AOPs, particularly during recent drought years, the Secretary has determined a need for more specific guidelines, consistent with the Consolidated  Decree and other applicable provisions of federal law to assist in the Secretary's determination of annual water supply conditions in the Lower Basin under low reservoir conditions. This increased level of predictability is needed by water managers and the entities that receive Colorado River water to better plan for and manage available water supplies, and to better integrate the use of Colorado River water with other water supplies that they rely on;
-Reclamation held a [https://youtu.be/xEFSfBMwqhE webinar] on Monday, January 30th to provide information on the Post-2026 Pre-Scoping Comment Summary Report. The report summarizes the pre-scoping comments received in response to the Federal Register Notice published in June 2022.
+*to date, storage of water and flows in the Colorado River has been sufficient so that it has not been necessary to reduce Lake Mead annual releases below 7.5 maf; that is, the Secretary has never reduced deliveries by declaring a “shortage” on the lower Colorado River. Without operational guidelines in place, water users in the Lower Division states who rely on Colorado River water are not currently able to identify particular reservoir conditions under which the Secretary would reduce the annual amount of water available for consumptive use from Lake Mead to the Lower Division states below 7.5 maf. Nor are these water users able to identify the frequency or magnitude of any potential future annual reductions in their water deliveries;
+*subsequent to the public consultation meetings held in the summer of 2005, the Secretary has also determined the desirability of developing additional operational guidelines that will provide for releases greater than or less than 8.23 maf from Lake Powell; and
-==[https://www.usbr.gov/ColoradoRiverBasin/post2026/scoping/index.html Scoping]==
+*to further enhance this coordinated reservoir approach, the Secretary has also determined a need for guidelines that provide water users in the Lower Division states the opportunity to conserve, store, and take delivery of water in and from Lake Mead for the purposes of enhancing existing water supplies, particularly under low reservoir conditions. The Secretary has determined the need to modify and extend the ISG to coincide with the duration of the proposed new guidelines. This will provide an integrated approach for reservoir management and more predictability for future Lower Division water supplies.  [https://www.usbr.gov/lc/region/programs/strategies/FEIS/Chp1.pdf]
-−
-*[https://www.usbr.gov/newsroom/news-release/4353 Notice of Intent and Request for Comments]
-−
-==Public Meetings==
-−
-Reclamation held three public scoping webinars to provide summary information and solicit public scoping comments on the development of Post-2026 Operational Guidelines and Strategies for Lake Powell and Lake Mead. The scoping webinar presentation and recordings are available for review. Each meeting presentation covered the same information. The public comment portions of the meetings varied based on the public participants at each meeting.
-−
-*Monday, July 17, 2023, 1 p.m. to 2 p.m. (MDT) – [https://www.youtube-nocookie.com/embed/sNh7S9HOKE8 Webinar Recording]
-*Tuesday, July 18, 2023, 10 a.m. to 11 a.m. (MDT) – [https://www.youtube-nocookie.com/embed/ak0hS4JNyBs Webinar Recording]
-*Monday, July 24, 2023, 6 p.m. to 7 p.m. (MDT) – [https://www.youtube-nocookie.com/embed/_7f9h396Pj4 Webinar Recording]
-−
-*[https://www.usbr.gov/ColoradoRiverBasin/post2026/scoping/CR%20Post-2026%20EIS_Scoping%20Presentation_508.pdf Webinar Presentation]
-−
-*[https://www.usbr.gov/oloradoRiverBasin/post2026/scoping/CR_Post-2026%20EIS_Scoping%20Presentation_SPANISH_508.pdf Presentation del webinar (En Español)]
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 *[https://www.usbr.gov/uc/progact/amp/twg/2024-04-11-twg-meeting/20240411-BiologicalOpinionNear-termColoradoRiverOperationsFinalSEISGlenCanyonDamOperations-508-AMWD.pdf Biological Opinion for the Near-term Colorado River Operations Final Supplemental EIS: Glen Canyon Dam Operations ]
 *[https://www.federalregister.gov/documents/2023/06/16/2023-12923/notice-of-intent-to-prepare-an-environmental-impact-statement-and-notice-to-solicit-comments-and Notice of Intent To Prepare an Environmental Impact Statement and Notice To Solicit Comments and Hold Public Scoping Meetings on the Development of Post-2026 Operational Guidelines and Strategies for Lake Powell and Lake Mead]

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 *[https://www.usbr.gov/ColoradoRiverBasin/post2026/index.html Colorado River Post 2026 Operations - Reclamation page]
 *[https://www.usbr.gov/ColoradoRiverBasin/interimguidelines/index.html 2007 Interim Guidelines - Reclamation page]
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← Older revision		Revision as of 16:51, 23 August 2024
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		+	*[https://www.usbr.gov/uc/progact/amp/twg/2024-04-11-twg-meeting/20240411-BiologicalOpinionNear-termColoradoRiverOperationsFinalSEISGlenCanyonDamOperations-508-AMWD.pdf Biological Opinion for the Near-term Colorado River Operations Final Supplemental EIS: Glen Canyon Dam Operations ]
	*[https://www.federalregister.gov/documents/2023/06/16/2023-12923/notice-of-intent-to-prepare-an-environmental-impact-statement-and-notice-to-solicit-comments-and Notice of Intent To Prepare an Environmental Impact Statement and Notice To Solicit Comments and Hold Public Scoping Meetings on the Development of Post-2026 Operational Guidelines and Strategies for Lake Powell and Lake Mead]		*[https://www.federalregister.gov/documents/2023/06/16/2023-12923/notice-of-intent-to-prepare-an-environmental-impact-statement-and-notice-to-solicit-comments-and Notice of Intent To Prepare an Environmental Impact Statement and Notice To Solicit Comments and Hold Public Scoping Meetings on the Development of Post-2026 Operational Guidelines and Strategies for Lake Powell and Lake Mead]

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-*[Upper Division States’ Alternative https://gunnisonriverbasin.org/wp-content/uploads/2024/03/UDS-Alternative-Submittal-Letter-March-5-2024.pdf]
+*[https://gunnisonriverbasin.org/wp-content/uploads/2024/03/UDS-Alternative-Submittal-Letter-March-5-2024.pdf Upper Division States’ Alternative ]
-*[Lower Basin Alternative https://www.azwater.gov/sites/default/files/2024-03/Lower%20Basin%20Alternative%20Letter%205.6.24.pdf]
+*[https://www.azwater.gov/sites/default/files/2024-03/Lower%20Basin%20Alternative%20Letter%205.6.24.pdf Lower Division States’ Alternative]
 *[https://www.usbr.gov/ColoradoRiverBasin/interimguidelines/seis/index.html Supplemental Environmental Impact Statement for Near-term Colorado River Operations]
 *[https://www.usbr.gov/ColoradoRiverBasin/post2026/index.html Colorado River Post 2026 Operations - Reclamation page]

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-The Notice of Intent to prepare an Environmental Impact Statement asks the public to consider the past 15 years of operating experience since adoption of the 2007 Interim Guidelines, as well as how the best-available science should inform future operational guidelines and strategies that can be sufficiently robust and adaptive to withstand a broad range of hydrological conditions. The NOI also asks the public to consider how and whether the purpose and elements of the 2007 Interim Guidelines should be retained, modified, or eliminated to provide greater stability to water users and the public throughout the Colorado River Basin. The NOI will be available for public comment until August 15, 2023.<br>
+Several reservoir and water management decisional documents and agreements that govern the operation of Colorado River facilities and management of the Colorado River are scheduled to expire at the end of 2026. These include the 2007 Colorado River Interim Guidelines for Lower Basin Shortages and Coordinated Operations for Lake Powell and Lake Mead (2007 Interim Guidelines), the 2019 Drought Contingency Plans, as well as international agreements between the United States and Mexico pursuant to the United States-Mexico Treaty on Utilization of Waters of the Colorado and Tijuana Rivers and of the Rio Grande (1944 Water Treaty).
-Scoping Public Meetings
+The Post-2026 process will be a multi-year NEPA process that will identify a range of alternatives and determine operations for Lake Powell and Lake Mead and other water management actions for potentially decades into the future. Given the scope of the task, and the conditions facing the Colorado River Basin, the Department believes it is important to begin this process as soon as possible to provide ample time for a thorough, inclusive, and science-based decision-making process to be completed before the end of 2026. [https://www.usbr.gov/ColoradoRiverBasin/post2026/index.html]
-−
-*Monday, July 17, 2023, 1 p.m. to 2 p.m. (MDT) – Register
-*Tuesday, July 18, 2023, 10 a.m. to 11 a.m. (MDT) – Register
-*Monday, July 24, 2023, 6 p.m. to 7 p.m. (MDT) – Register
-−
-Comments Due
-−
-*August 15, 2023 [https://www.usbr.gov/ColoradoRiverBasin/post2026/index.html]
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