There are three levels of analysis in the NEPA process: Categorical Exclusion (CX), Environmental Assessment (EA) and Environmental Impact Statement (EIS). Wild horse management actions often fall into the middle category but major changes, such as the Rock Springs RMP Amendments, require an EIS.
A project involving wild horses and burros may begin with a scoping request, to receive input from the public, followed by staff work to formulate an action plan and draft an environmental assessment. The EA looks at the consequences of a preferred action and one or more alternatives.
The preliminary plan and EA are posted for public review and may be revised in light of substantive comments.
If there are no major issues, a decision record and finding of no significant impact may be is issued, allowing the plan to go forward. This does not mean the roundup starts the following week! There are priorities and funding is not unlimited. The plan may face legal challenges.
The process can take several years to complete although it may be shortened or bypassed altogether in the case of emergencies.
The Sulphur HMA is in western Utah on the Nevada border.