Project Links
A comment period for this project closes
May 29, 2026:
Days, Hours, Min.
Days, Hours, Min.
Yellowstone National Park Bison Management Plan SEIS
Yellowstone National Park » Yellowstone National Park Bison Management Plan SEIS
SUMMARY:
The National Park Service (NPS) intends to prepare a Supplemental Environmental Impact Statement (SEIS) to update the analysis in the Yellowstone National Park Bison Management Plan Final Environmental Impact Statement (EIS), 2024. Seasonal bison migration out of the park has become less predictable in timing and duration. This change affects the reliability of management assumptions that informed the 2024 analysis, warranting supplemental review.
DATES:
All comments must be received or postmarked on or before May 29, 2026.
FOR FURTHER INFORMATION CONTACT:
Linda Veress, (307) 344-2015
yell_public_affairs@nps.gov.
SUPPLEMENTARY INFORMATION:
The 2024 EIS evaluated three alternatives that considered various approaches and tools to maintain an ecologically sustainable population of wild, migratory bison while continuing to work with partners to address brucellosis transmission, human safety, and property damage, and fulfill tribal trust responsibilities. The NPS will supplement the 2024 Final EIS by developing one or more new alternatives, in addition to those previously considered. These new alternative(s) may incorporate elements previously dismissed from detailed analyses or include elements not previously considered. The SEIS will provide additional analysis on the reasonably foreseeable effects of the new alternative(s). Further, the 2024 Final EIS has been challenged in two lawsuits in the District of Montana (Alliance for the Wild Rockies et al. v. Carlstrom et al., CV-25-12-BLG-BMM & State of Montana v. Burgum et al., CV-24-180-BLG-BMM). As part of the SEIS process, NPS will determine whether additional analysis of any issues raised in those lawsuits is appropriate, and if so, will include such analysis in the SEIS.
While a Notice of Intent is not required for a SEIS, the NPS is soliciting information or studies or analyses relevant to this process and environmental impacts in the form of public comments. The NPS will request additional public comments on a draft SEIS before publishing a final SEIS.
Relevant Information, Studies, or Analyses:
Information, studies, or analyses relevant to the SEIS are found beginning on page 121 of the 2024 Final EIS and at the below address: https://parkplanning.nps.gov/YellowstonebisonEIS.
The National Park Service (NPS) intends to prepare a Supplemental Environmental Impact Statement (SEIS) to update the analysis in the Yellowstone National Park Bison Management Plan Final Environmental Impact Statement (EIS), 2024. Seasonal bison migration out of the park has become less predictable in timing and duration. This change affects the reliability of management assumptions that informed the 2024 analysis, warranting supplemental review.
DATES:
All comments must be received or postmarked on or before May 29, 2026.
FOR FURTHER INFORMATION CONTACT:
Linda Veress, (307) 344-2015
yell_public_affairs@nps.gov.
SUPPLEMENTARY INFORMATION:
The 2024 EIS evaluated three alternatives that considered various approaches and tools to maintain an ecologically sustainable population of wild, migratory bison while continuing to work with partners to address brucellosis transmission, human safety, and property damage, and fulfill tribal trust responsibilities. The NPS will supplement the 2024 Final EIS by developing one or more new alternatives, in addition to those previously considered. These new alternative(s) may incorporate elements previously dismissed from detailed analyses or include elements not previously considered. The SEIS will provide additional analysis on the reasonably foreseeable effects of the new alternative(s). Further, the 2024 Final EIS has been challenged in two lawsuits in the District of Montana (Alliance for the Wild Rockies et al. v. Carlstrom et al., CV-25-12-BLG-BMM & State of Montana v. Burgum et al., CV-24-180-BLG-BMM). As part of the SEIS process, NPS will determine whether additional analysis of any issues raised in those lawsuits is appropriate, and if so, will include such analysis in the SEIS.
While a Notice of Intent is not required for a SEIS, the NPS is soliciting information or studies or analyses relevant to this process and environmental impacts in the form of public comments. The NPS will request additional public comments on a draft SEIS before publishing a final SEIS.
Relevant Information, Studies, or Analyses:
Information, studies, or analyses relevant to the SEIS are found beginning on page 121 of the 2024 Final EIS and at the below address: https://parkplanning.nps.gov/YellowstonebisonEIS.