Methods and assumptions used in this impact analysis include the following:
The number of wild horses would increase by about 18 percent annually and be maintained by periodic removals.
Wild horse removals (gathers) would occur about every 3 to 5 years in each HMA.
Maintenance of wild horse populations at initial appropriate management levels in existing HMAs would be accomplished through removals and selected application of other population control practices.
Wild horse gathers would use existing trap locations for the most part.
Conducting wild horse gathers in the fall, when temperatures are lower, would reduce stress on the animals; however, summer gathers scheduled during the cooler morning hours would also limit such stress.