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Glen Canyon Dam Long-Term Experimental and Management Plan EIS


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Glen Canyon Dam Long-Term Experimental and Management Plan EIS news, events, and announcements

December 15, 2016

LTEMP ROD Is Signed

PDF Record of Decision for the Glen Canyon Dam Long-Term Experimental and Management Plan Final Environmental Impact Statement (3.5 MB)

October 7, 2016

LTEMP FEIS Is Published

The Long-Term Experimental and Management Plan (LTEMP) Final Environmental Impact Statement (FEIS) is now available for downloading or viewing on this website. The FEIS updated text based on cooperating agency input and public comments on the DEIS received during the 122-day public comment period. The Department of the Interior will not issue a final decision on the proposed action for a minimum of 30 days after the date that the Environmental Protection Agency publishes its Notice of Availability of Weekly Receipt of Environmental Impact Statements in the Federal Register. After the 30-day public review period, the Department of the Interior will complete a Record of Decision (ROD). The ROD will state the action that will be implemented and discuss all factors leading to that decision.

For more information, see the Notice of Availability, press release, and Executive Summary available below.

PDF DOI Notice of Availability for the Final Environmental Impact Statement for the Long-Term Experimental and Management Plan for the Operation of Glen Canyon Dam, Page, Arizona (200 KB)
Web page Interior Department Releases Final Environmental Impact Statement for Glen Canyon Dam Adaptive Management October 7, 2016
PDF LTEMP FEIS Executive Summary (3.0 MB)

May 10, 2016

LTEMP DEIS Public Comment Period Closed

The public comment period for the Glen Canyon Dam Long-Term Experimental and Management Plan (LTEMP) Draft Environmental Impact Statement (DEIS) is now closed. The public comment period began on January 8, 2016, and ended May 9, 2016.


April 5, 2016

Federal Register Notice for LTEMP DEIS Comment Period Extension to May 9, 2016

PDF Notice of Extension of Public Comment Period for the Draft Environmental Impact Statement for Adoption of a Long-Term Experimental and Management Plan for the Operation of Glen Canyon Dam, Page, Arizona (189 KB) published in the Federal Register on April 5, 2016.


March 18, 2016

LTEMP DEIS Comment Period Extended to May 9, 2016

In response to several requests for an extension, the Department of the Interior, through the Bureau of Reclamation (Reclamation) and the National Park Service (NPS), is extending the public comment period for the Glen Canyon Dam Long-Term Experimental and Management Plan (LTEMP) Draft Environmental Impact Statement (DEIS). The public comment period for the DEIS was originally scheduled to end on Thursday, April 7, 2016, but has been extended to May 9, 2016. Reclamation and the NPS will accept comments that are received or postmarked by that date.

A Federal Register notice of the extension will be published in the near future.


January 8, 2016

LTEMP DEIS Now Available for Public Review

The Long-Term Experimental and Management Plan (LTEMP) Draft Environmental Impact Statement (DEIS) is now available for downloading or viewing on this website. Reclamation and NPS invite the public and other interested parties to provide comments on the DEIS as described on the Getting Involved page. Public meetings will be held in February and March 2016 to present an overview of the findings of the LTEMP DEIS and allow the public to ask questions about the DEIS. The comment period ends on April 7, 2016.

For more information, see the Notice of Availability, press release, and Executive Summary available below.

PDF DOI Notice of Availability and Notice of Public Meetings for the Draft Environmental Impact Statement for the Long-Term Experimental and Management Plan for the Operation of Glen Canyon Dam, Page, Arizona (204 KB)
Web page Interior Department Proposes Adaptive Management Framework for Glen Canyon Dam January 8, 2016
PDF LTEMP DEIS Executive Summary (3.1 MB)

April 21, 2014

LTEMP EIS Alternatives

Six alternatives, including the No-Action Alternative, have been developed for consideration in the Glen Canyon Dam Long-Term Experimental and Management Plan (LTEMP) Environmental Impact Statement (EIS). The alternatives represent different ways Glen Canyon Dam could be operated under the LTEMP over the next 20 years, and will serve as the basis of the National Environmental Policy Act (NEPA) assessment to be presented in the LTEMP EIS. At the February 20, 2014, Adaptive Management Working Group (AMWG) Meeting in Phoenix, Arizona, the LTEMP EIS team presented an overview of the alternatives. This presentation and a description of these alternatives can be downloaded using the links below. Although these are subject to change as the NEPA process continues, they are being provided now as an update to interested members of the public.

PDF Presentation to AMWG: February 20, 2014 (951 KB)
PDF Alternatives for Consideration in the Glen Canyon Dam Long-Term Experimental and Management Plan Environmental Impact Statement (322 KB)

November 28, 2012

Public Presentation Originally Scheduled for August 22-23 Postponed

The public presentation on alternatives that was previously scheduled for August 22-23, 2012, in Flagstaff, Arizona, has been postponed. Information on the presentation will be posted on this website as soon as it is available.


September 18, 2012

Public Input Received on LTEMP EIS Alternatives

The Bureau of Reclamation and the National Park Service extended an opportunity for members of the public to provide input on LTEMP EIS alternatives after preliminary alternative concepts were published in a newsletter on March 30, 2012, and the agencies hosted a public workshop on alternatives in Flagstaff, Arizona on April 4 and 5, 2012. Input was received from the Basin States (consisting of the seven Colorado River Basin states and the Upper Colorado River Commission), the Colorado River Energy Distributors Association (CREDA), the Grand Canyon Trust, and the Irrigation and Electrical Districts Association of Arizona (IEDA). This input can be viewed at the following links:

PDF Basin States input (1.5 MB)
PDF CREDA input (262 KB)
PDF Grand Canyon Trust input (53 KB)
PDF IEDA input (303 KB)

The LTEMP joint-lead agencies are reviewing this material and using it to inform development of alternatives to be considered in the LTEMP EIS.


July 23, 2012

Public Presentation Originally Scheduled for August 22-23 Postponed

The public presentation that was previously scheduled for August 22-23, 2012, in Flagstaff, Arizona, has been postponed until the early fall. The revised dates will be posted on this website as soon as they are determined.


July 23, 2012

LTEMP EIS Public Involvement Plan Released

The Bureau of Reclamation (Reclamation) and the National Park Service (NPS) have developed a Public Involvement Plan to fulfill and exceed the public involvement requirements of the National Environmental Policy Act (NEPA) and the Council on Environmental Quality regulations implementing NEPA. Both Reclamation and NPS highly value public participation and strive to encourage public participation in the NEPA process. This Plan is designed to establish a process that maximizes public participation and information at the same time it creates opportunities for stakeholders and members of the interested public to provide input throughout the environmental analysis process.

PDF Public Involvement Plan for the Glen Canyon Dam Long-Term Experimental and Management Plan EIS (64 KB)

May 29, 2012

Salazar Announces Improvements to Glen Canyon Dam Operations

Secretary of the Interior Ken Salazar announced on May 23 that, as part of the Glen Canyon Dam Adaptive Management Program, the Bureau of Reclamation has approved two long-term research and experimental programs of high-flow releases and native fish protection to preserve and improve the Grand Canyon and its resources. For more information, see the entire press release below.

PDF Salazar Announces Improvements to Glen Canyon Dam Operations to Restore High Flows and Native Fish in Grand Canyon May 23, 2012 (80 KB)

May 11, 2012

Reclamation and NPS Announce Current Schedule for the LTEMP EIS

The Bureau of Reclamation (Reclamation) and the National Park Service have announced the current schedule for drafting the Glen Canyon Dam Long Term Experimental and Management Plan Environmental Impact Statement (LTEMP EIS). This schedule is intended to help interested parties plan for key involvement periods. The letter announcing the schedule is available in PDF format below.

PDF Reclamation and NPS Announce Schedule for the LTEMP EIS May 10, 2012 (71 KB)

April 17, 2012

Public Meeting Held in Flagstaff to Discuss Preliminary LTEMP Alternatives

Members of the public participated in a two-day meeting on alternatives being considered for inclusion in the LTEMP EIS. The meeting was held on April 4 and 5, 2012 at the High Country Conference Center in Flagstaff, Arizona. A call-in number was provided for those unable to attend in person. Over 70 people attended the meeting, including members of the public, stakeholders, and project staff from Reclamation, NPS, and Argonne National Laboratory.

For more information about the meeting and to view slides from presentations made at the meeting see the Public Meetings page.


April 17, 2012

Web-based Public Meetings Were Held to Discuss LTEMP Scoping Report

Two Web-based meetings were held on March 27, 2012 to provide a summary of public comments on the scope of the LTEMP EIS. A total of about 30 people participated in the meetings. Staff from Reclamation, NPS, and Argonne National Laboratory presented a slide-show overview of public scoping comments. Members of the public were afforded the opportunity to ask questions about the scoping process and other aspects of the project. The presentation slides used for the Web-based meetings are available below.

PDF Presentation: Summary of Scoping Comments for the LTEMP EIS (415 KB)

March 30, 2012

LTEMP EIS Preliminary Alternative Concepts Newsletter

The Bureau of Reclamation (Reclamation) and the National Park Service (NPS) have published a newsletter presenting preliminary alternative concepts for the LTEMP EIS. Other topics discussed include the Alternatives Meeting on April 4 and 5, and an overview of the purpose, need, and objectives for the LTEMP EIS. The newsletter is available in PDF format below.

PDF LTEMP EIS Newsletter March 30, 2012 (314 KB)

March 28, 2012

Press Release for April 4-5 Alternatives Meeting

The Bureau of Reclamation (Reclamation) and the National Park Service (NPS) have announced that the public is invited to participate in a two-day meeting on alternatives being considered for inclusion in the LTEMP EIS. The meeting will be held from 9:00 am to 5:00 pm on April 4 and 5, 2012. For more information, view the press release below. See the Public Meetings page for registration information.

PDF Public Invited to Glen Canyon Dam LTEMP Alternatives Development Meeting (33 KB)

March 21, 2012

Press Release for March 27 Web-Based Public Meetings

The Bureau of Reclamation (Reclamation) and the National Park Service (NPS) have announced that the public is invited to participate in web-based presentations, to be held on March 27 that will summarize public comments on the scope of the LTEMP EIS. For more information, view the press release below. See the Public Meetings page for instructions and registration.

PDF Department of the Interior to Present Summary of Public Input Received on a Long-Term Plan for Glen Canyon Dam Operations (54 KB)

March 19, 2012

LTEMP EIS Upcoming Public Meeting to Discuss Alternatives

The public is invited to participate in a two-day meeting on alternatives being considered for inclusion in the LTEMP EIS. The meeting will be held on April 4 and 5, 2012 in Flagstaff, AZ.

The preliminary draft alternatives being considered for evaluation will be presented and discussed at this meeting hosted by the Bureau of Reclamation and the National Park Service. Stakeholders and other attendees who have alternatives to propose should bring those ideas to the meeting. For more information about this meeting, see the Public Meetings page.


March 16, 2012

LTEMP EIS Upcoming Web-Based Public Meetings

Two Web-based public meetings will be held on March 27, 2012 at 1:00pm and 6:00pm Mountain Daylight Time. The public is invited to participate in these meetings, which will provide a summary of public comments on the scope of the LTEMP EIS. The public will be able to watch a live overview of the Scoping Report, and will have an opportunity to ask questions of technical experts and managers involved in the EIS. For more information, see the Public Meetings page.


March 16, 2012

LTEMP EIS Scoping Report Available

Reclamation and the NPS have reviewed and evaluated the comments received during the public scoping period for the LTEMP EIS and have developed the "Summary of Public Scoping Comments on the Glen Canyon Dam Long-Term Experimental and Management Plan Environmental Impact Statement" (Scoping Report), which is now available on the Documents page.


February 1, 2012

LTEMP EIS Public Scoping Period Closed

The public scoping period for the LTEMP EIS is now closed. The public scoping period began on July 6, 2011 and ended January 31, 2012.


January 9, 2012

Federal Register Notice for LTEMP EIS Public Scoping Period Extension to January 31, 2012

PDF Extension of Public Scoping Period for the Draft Environmental Impact Statement for Adoption of a Long-term Experimental and Management Plan for the Operation of Glen Canyon Dam (150 KB) published in the Federal Register on December 30, 2011.


November 28, 2011

LTEMP EIS Public Scoping Period Extended to January 31, 2012

In response to several requests from interested parties for an extension, the Department of the Interior, through the Bureau of Reclamation and the National Park Service, is extending the public scoping period for the Draft Environmental Impact Statement for Adoption of a Long-Term Experimental and Management Plan for the Operation of Glen Canyon Dam. The public scoping period will now run through January 31, 2012, and Reclamation and the NPS will accept comments that are received or postmarked by that date.

A Federal Register notice of the extension will be published in the near future.


October 17, 2011

Glen Canyon Dam Long-Term Experimental and Management Plan EIS Web Site Launched

The Glen Canyon Dam Long-Term Experimental and Management Plan (LTEMP) Environmental Impact Statement (EIS) Web site was launched October 17, 2011 at http://ltempeis.anl.gov. This Web site is the online center for public information about the LTEMP EIS.

The Department of the Interior, through the Bureau of Reclamation (Reclamation) and the National Park Service (NPS), will prepare a Draft EIS for the adoption of a long-term experimental and management plan for the operation of Glen Canyon Dam. The EIS will fully evaluate dam operations and will provide the basis for decisions that identify management actions and experimental options that will provide a framework for adaptively managing Glen Canyon Dam operations over the next 15 to 20 years.


October 17, 2011

Notice of Intent Published in Federal Register

PDF Notice to Solicit Comments and Hold Public Scoping Meetings on the Adoption of a Long-Term Experimental and Management Plan for the Operation of Glen Canyon Dam (147 KB) published in the Federal Register on October 17, 2011.