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Yellowstone National Park
Winter Use Technical Documents
Photo of the Grand Tetons covered in snow in front of a clear blue sky.
Grand Tetons in winter.

Documents pertaining to winter use are available below. On November 7, 2008, the U.S. District Court for the District of Wyoming ordered the National Park Service to reinstate the 2004 rule for snowmobile and snowcoach use in Yellowstone and Grand Teton National Parks and the John D. Rockefeller, Jr. Memorial Parkway. That rule allows up to 720 snowmobiles per day into Yellowstone, along with 78 snowcoaches. Additional information may be obtained from Yellowstone National Park at (307) 344-2019.




2008 Winter Use Plans Environmental Assessment

On Nov. 3, 2008, the NPS released an environmental assessment for winter use plans for Yellowstone and Grand Teton National Park. Public comment was accepted on the EA from Nov. 3 to 17. The EA is available here: Part I (1.9 MB pdf), Part II (745 Kb pdf). A proposed rule to implement the preferred alternative contained in the new plan was also published in the Federal Register, and was also open for a 15 day public review and comment period. The rulemaking process supports but is separate from the public review and comment period on the EA. However, as noted above, pursuant to the Nov. 7 court order, the National Park Service will be reinstating the 2004 regulation. Information in the comments on both the EA and the rule will be used in the development of a new long-term winter use plan.



2007-2008 Monitoring Reports and Other Studies

These draft reports summarize Yellowstone's monitoring results for soundscapes, wildlife, air quality, and exhaust exposure monitoring from last winter. The reports are available for technical review by all interested parties. Please provide focused substantive, technical comments about the information presented. In particular, comments regarding methodology, experimental design, analysis and scientific reasoning would be valuable. Once technical and internal reviews are completed and the authors have the opportunity to address any comments that are provided, the on-line draft report will be replaced with the finalized report. Please submit your comments to this office by November 30, 2008. Comments may be mailed to: Winter Use Planning, PO Box 168, Yellowstone National Park, WY 82190.

• Natural Soundscape Monitoring in Yellowstone National Park, December 2007-March 2008, June 30, 2008 (part 1, 1.4 MB pdf) (part 2, 2MB pdf)

• Wildlife Responses to Motorized Winter Recreation in Yellowstone: 2008 Annual Report (December 14, 2007 through March 24, 2008) (340 Kb pdf)

• Winter Air Quality in Yellowstone National Park, 2007-2008 (818 KB pdf)

• Safety Memo (251 Kb pdf)

The following draft report provides information about sound testing last February of selected snowcoaches and snowmobiles at Yellowstone's South Entrance. It was on review for several months this summer and fall. Once technical and internal reviews are completed and the author has the opportunity to address any comments that were provided, the on-line draft report will be replaced with the finalized report.

Exterior Sound Level Measurements of Over-Snow Vehicles at Yellowstone National Park (1.18 MB pdf)

This draft report summarizes three related surveys of park visitors by the University of Montana. Done last winter, the surveys asked visitors about their perceptions of park soundscapes and of their interactions with bison; the third study asked guides about their perceptions of mandatory guiding. The report is available for technical review by all interested parties. Please provide focused substantive, technical comments about the information presented. In particular, comments regarding methodology, experimental design, analysis and scientific reasoning would be valuable. Once technical and internal reviews are completed and the author has the opportunity to address any comments that are provided, the on-line draft report will be replaced with the finalized report. Please submit your comments to this office by November 30, 2008. Comments may be mailed to: Winter Use Planning, PO Box 168, Yellowstone National Park, WY 82190.

Winter Experiences of Old Faithful Visitors in Yellowstone National Park (1.4 MB pdf)

This report provides information about the effects of implementing the two alternatives on the socioeconomic environment of local communities, counties, and the region. The information in this report was used in the 2008 EA. The report is available for technical review by all interested parties. Please provide focused substantive, technical comments about the information presented. In particular, comments regarding methodology, analysis and scientific reasoning would be valuable. Please submit your comments to this office by November 30, 2008. Comments may be mailed to: Winter Use Planning, PO Box 168, Yellowstone National Park, WY 82190.

Economic Analysis: Proposed Winter Use Plans for the Greater Yellowstone Area (156 Kb pdf)


 

2007 Winter Use Plans and Associated Documents

On September 15, 2008, the U.S. District Court for the District of Columbia vacated and remanded the 2007 FEIS, ROD, and Final Rule to the agency. They are provided here, along with associated modeling reports and other analyses.

• Record of Decision Amendment – Sylvan Pass Management (345 Kb pdf)

• Final Rule (153 Kb pdf)

• Record of Decision (286 Kb pdf)

• Volume 1 Abstract, Table of Contents, and Summary (843 KB pdf)

• Volume 1 Chapters 1, 2, and 3 (2.4 MB pdf)

• Volume 1 Chapters 4, 5, and Bibliography (2.8 MB pdf)

• Volume 2 Appendices A-I (1.4 MB pdf)

• Volume 2 Appendix J (6.7 MB pdf)

Winter-use-related documents:

Below are additional winter-use documents.

Economic Analysis of Winter Use Regulations in the GYA (Final Report) (1.75 MB pdf)

Public Comment Report for Winter Use DEIS (294 KB pdf)

Public Comment Report for the Proposed Rule (274 pdf)

Scoping Report - December 2005 (748KB pdf)

Sylvan Pass Operational Risk Management Assessment (Final Report) (2.5 MB pdf)

Avalanche Hazard Assessment & Mitigation Report Sylvan Pass, Yellowstone National Park - (1 MB pdf)

Snow Water Equivalent and Temperature Data for Oversnow Vehicle Travel Areas in Grand Teton and Yellowstone National Park - September 2005 (1.4 MB pdf)

 

Modeling reports were prepared by consultants to the National Park Service to assist the NPS in preparing the Draft Environmental Impact Statement on Winter Use Planning. Draft modeling reports are made available for technical review and comment. The authors address the technical comments and provide the NPS with final reports, which are posted below.

Draft Supplemental Technical Memorandum, Regional Economic Impact Analysis of Options for Yellowstone and Grand Teton National Parks and John D. Rockefeller, Jr. Memorial Parkway Winter Use Management (102 KB pdf)

Air Quality Report Addendum July '07 (94 KB pdf)

Sound Modeling Report Addendum June 2007 (2.2 MB pdf)

Modeling Report-Sound Due to Over-Snow Vehicles:

Air Quality Modeling Report (Final) (1.24MB pdf)
• Appendices E, F and I are available upon request in a zip file. If you are interested in viewing these large data files, please send an email request to e-mail us

Final Technical Report, Regional Economic Impact Analysis for Yellowstone and Grand Teton National Parks and John D. Rockefeller, Jr., Memorial Parkway Winter Use Draft Environmental Impact Statement (355 kb pdf)

• The following memorandum corrects an error in a recommendation by Dr. P.J. White and others regarding winter visitor use levels in Yellowstone. Memorandum to Tom Olliff (36 kb pdf)


 

Court Rulings:

U.S. District Court for Wyoming, November 7, 2008 ruling (126 Kb pdf)

U.S. District Court for the District of Columbia, September 15, 2008 ruling (or 142 Kb pdf version)

• U.S. District Court for the District of Columbia, September 24, 2007 ruling

U.S. District Court for Wyoming, June 27, 2007 ruling (951 KB pdf)

U.S. District Court for Wyoming, October 15, 2005 ruling (1.9 MB pdf)

U.S. District Court for Wyoming, October 14, 2004 ruling (1.4MB pdf)

U.S. District Court for Wyoming, February 10, 2004 ruling. (95KB pdf)

U.S. District Court for the District of Columbia December 16, 2003 ruling. (162KB pdf)


Previous Winter Use Planning Documents:

The first three files below guided winter use in the parks for the winters 2004-05 through 2006-07. All of these files are listed for reference only; they are not currently guiding management in Yellowstone and Grand Teton national parks.

Final Rule Published in the Federal Register Implementing the Temporary Winter Use Plan - November 10, 2004 (351KB pdf)

Temporary Winter Use Plans - Finding of No Significant Impact, November 2004 (735KB pdf)

Temporary Winter Use Plans Environmental Assessment (1.04MB pdf)- August 20, 2004

Regulation Implementing the SEIS Record of Decision, December 11, 2003 (188KB pdf)

Final SEIS, Winter Use Plans Record of Decision - March 25, 2003 (654KB pdf)

Final Supplemental Environmental Impact Statement, Winter Use Plans - February 2003

Final Rule Implementing the EIS Record of Decision - January 22, 2001 (451KB pdf)

Winter Use Plans, Record of Decision- November 22, 2000 (268KB pdf)

• Please contact the Management Assistant's Office at 307-344-2019 if you would like a copy of the "Temporary Closure for a Winter Road" (1998) or the "Final Winter Use Plan, Final Environmental Impact Statement" (December 2000).

Files labeled "pdf" require Adobe Acrobat Reader to be viewed or printed.



Upper Geyser Basin Hydrothermal Features on a Winter Day.  

Did You Know?
Yellowstone contains approximately one-half of the world’s hydrothermal features. There are over 10,000 hydrothermal features, including over 300 geysers, in the park.

Last Updated: December 23, 2008 at 16:07 EST