The county seeks an order to remove "all excess" horses, arguing that the BLM's plan could result in up to $1.1 million in "opportunity costs" to the local economy. The extra horses' depletion of forage and water "infringes upon the rights of Beaver County citizens who hold grazing permits and leases to conduct livestock operations on private, state, and federal lands," the suit states.
The BLM declined to comment on the litigation, but the agency says it lacks the corral space and funding to take in the number of horses Beaver and other rural Utah counties want off the range. The government is prohibited from euthanizing healthy horses, and there are not enough people interested in adopting wild horses. Some 45,000 are already warehoused for life in contract corrals.
Recognizing the situation as unsustainable, the BLM is experimenting with fertility control as a fresh alternative that federal officials hope can appease all sides in an issue that pits horse advocates against ranchers. But that, too, is controversial.
Utah's West Desert is the scene of three big roundups, known as "gathers," this winter; two are completed and the third is slated to begin Saturday after a federal judge declined to an issue an injunction sought by an animal-welfare group.
The Sulphur gather in Beaver County wrapped up Jan. 31. The BLM had planned to return 400 animals back to the range, but decided to return only 192. The eighty mares in this group were injected with fertility-control treatments, while the studs were left intact.
The agency was only able to get authorization for this gather because Sulphur horses have been posing a public-safety threat along State Route 21 and the gather plan relied heavily on fertility control, according to BLM spokeswoman Lisa Reid.
"Removing horses to [appropriate management level] is not on the top of the list of our priorities," Reid said.
During the two-week Sulphur operation, 450 of the herd's estimated 1,150 horses were left on the herd management area outside Milford. This is more than double the 165 to 250 horses the BLM says are appropriate for this area. The agency's plan to return horses defies a legal obligation to keep numbers below 250 here, the Beaver suit alleges.
Horse advocates, meanwhile, blasted the Beaver County suit as a waste of the court's time.
Similar arguments have been rejected in other jurisdictions, according to Suzanne Roy, executive director of the American Wild Horse Preservation Campaign. She said the courts have rejected ranchers' claims that horse numbers above AMLs equate with "overpopulation."
"They [the BLM] have broad discretion to deal with overpopulation — if they decide there is overpopulation — in a variety of ways," Roy said. "They are just wasting taxpayers dollars to pursue this claim that has been rejected by the 10th Circuit Court of Appeals."
Roy said she believes the AMLs are arbitrarily set, with have little grounding in science, and livestock, particularly sheep, are the bigger threat to range conditions at Sulphur, one of Utah's 19 horse management areas.
In its own environmental review, however, the BLM concluded the wild horses will deplete forage if allowed to proliferate.
As a testament to the depleted range, BLM wranglers noted the Sulphur horses were in sub-par condition as they were herded into pens last month, according to Reid. Some 26 were so weak they had to be euthanized, and another four put down after sustaining injuries while being directed toward holding pens or chutes. One severed its spine when it panicked and crashed into a gate.
The BLM takes steps to avoid harming the horses, but injuries do happen and such mishaps are cited by animal-welfare advocates in their own legal battles against horse removals, which they view as costly, ineffective and inhumane.