BLM will remove approximately 200 wild horses from private lands on either side of the southern boundary of the South Steens HMA, starting September 21. Private areas are denoted by white in the following map.
The operation will be carried out with helicopters but will not be open to public observation, according to the news release.
The HMA covers 126,732 acres in southeastern Oregon and has an AML of 304, for an aimed-at stocking rate of 2.4 horses per thousand acres.
The South Steens Herd Area, not shown in the map, is about twice the size of the HMA, meaning the horses have lost half of the land they roamed when the WHB Act was signed into law. The HA appears on page 4 of the Oregon HMA maps. The roundup will likely include lands in the HA.
The HMA intersects three grazing allotments, according to Chapter III, Section C, in the Final EA for wild horse management actions in the HMA. Public-lands ranchers receive an estimated 10,299 AUMs per year inside the HMA, compared to 3,648 AUMs per year for the horses.
The forage diverted to livestock puts the true AML at 1,162, commensurate with the current population.
Captured animals will be taken to the off-range corrals in Hines, OR. Gather stats and daily reports will be posted to this page.
The announcement did not indicate if Oregon is a fence-out state.
RELATED: South Steens Roundup Pending?
UPDATE: The size of the HMA is 134,491 acres, for an aimed-at stocking rate of 2.3 wild horses per thousand acres.