How Many Wild Horses Can the Sonoma Range HA Support?

It’s one of three areas identified for wild horses in the East Pershing Complex that’s now managed principally for livestock.

Table 9 in the Final EA for pest control and resource enforcement indicates eight allotments that overlap the HA.

The National Data Viewer suggests that roughly half of Thomas Creek is outside the HA so 50% was used for the amount of overlap instead of 100% as indicated in the table.

The other percentages look okay.

The Allotment Master Report provides management status, acreage and active AUMs.

Sonoma Range Calcs 12-08-23

Approximately 61% of the public acreage is in the Improve category.

The forage assigned to livestock inside the HA is 9,989 AUMs per year, enough to support 832 wild horses.  The current AML is zero so the True AML would be 832.

The HA covers 212,587 total acres, including 150,095 public acres, so the stocking rate at the new AML would be 5.5 wild horses per thousand public acres.

An assumption in the calculations above is that forage is evenly distributed across the allotments.  If 95% of Clear Creek is inside the HA, then so is 95% of the forage.

The base property tied to the Sonoma Allotment was on the market earlier this year for $11.2 million.

The base property tied to Clear Creek sold last year to J6 Ranches.

RELATED: Habitat Loss in the East Pershing Complex.

Sonoma Range HA with Allotments 12-08-23

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