You are here: 

Environment

Categorical exclusions are posted here to promote transparency and openness. Some actions may have environmental impacts that require an environmental assessment and a detailed analysis to determine the extent and severity of the impacts. For actions that have significant impacts or consequences to the environment or human health, UGP prepares environmental impact statements.

• Categorical Exclusions
  • Routine Activities (1.45mb pdf)
  • 2021 Power Marketing Initiative Proposal (387kb pdf)
  • Bristol to Groton Transmission Line Upgrade Project (191kb pdf)
  • Circle Substation Expansion (125kb pdf)
  • Construction of Appledorn Substation (170kb pdf)
  • Dawson County Maintenance Facility, Construction of Additional Buildings (148kb pdf)
  • Elliot Substation Construction and Transmission Line (143kb pdf)
  • Fort Randall-Sioux City Hazard Tree and Vegetation Control/Removal (474kb pdf)
  • Garrison Switchyard Transmission Line Reconstruction (804kb pdf)
  • Havre Substation Addition (544kb pdf)
  • Jamestown-Grand Forks Transmission Line Reroute (647kb pdf)
  • Letcher-Mitchell Interconnection (689kb pdf)
  • North Oakes (139kb pdf)
  • Prairie Rose Transmission Line Crossing (688kb pdf)
  • Pronghorn Gas Plant Transmission Line Interconnection (198kb pdf)
  • Shirley Pump Relocation and Transformer Replacement (134kb pdf)

  NOTE: The Lake Bowdoin, Additon of New Substation Categorical Exclusion and the O'Fallon Creek Substation Yard Expansion Categorical Exclusion have been withdrawn by Western. The National Environmental Protection Act compliance for these projects will be covered by the Keystone XL Pipeline project Final Environmental Impact Statement.
  
  

• Environmental Assessment (EA)
  • Williston to Stateline Transmission Line Project Final EA (4.93mb pdf)
• Williston to Stateline Transmission Line Project Finding of No Significant Impact (1.52mb pdf)
• Williston to Stateline Transmission Line Project Draft EA (5.8mb pdf)
• Williston to Tioga Transmission Line Project EA for Pre-approval Review
• Baldwin Wind Energy Center Project Finding of No Significant Impact (1.83mb pdf)
• Baldwin Wind Energy Center Final EA (9.12mb pdf)

• Environmental Impact Statement (EIS)
  • Groton Generation Projects
  • Draft EIS, Deer Creek Station Energy Facility Project, Brookings County, South Dakota (12.7mb pdf)
  • Deer Creek Station Energy Facility Project Record of Decision (900kb pdf)
  • Grande Praire Wind Farm, O'Neill, NE
  • Wilton IV Wind Energy Center EIS (DOE/EIS-0469)
  • Upper Great Plains Wind Energy Programmatic EIS (DOE/EIS-0408)
  • Antelope Valley Station to Neset Transmission Project