Rock Springs Roundup Day 102

Operations resumed on January 6.  Gather stats through January 16:

  • Target: Horses
  • Type: Planned
  • Method: Helicopter
  • Captured: 4,045, up from 3,686 on Day 99
  • Average daily take: 39.7
  • Capture goal: 4,400
  • Removal goal: 3,500
  • Returned: 580, no change from Day 99
  • Deaths: 37, up from 33 on Day 99
  • Shipped: 3,476, up from 3,222 on Day 99

One horse died on Day 101 of unspecified causes and three others were put down due to club feet.  The death rate is 0.9%.

The total includes 1,555 stallions, 1,653 mares and 837 foals.  The gather page shows 1,554 stallions and 1,640 mares.

Foals represented 20.7% of the horses captured.  Of the adults, 48.5% were male and 51.5% were female.

The percentage of foals is consistent with a herd growth rate of 16% per year, assuming a 5% death rate.

Body condition scores were not reported.

Gather activity has moved to White Mountain and Little Colorado but the location of the trap site was not specified.

Rock Springs HMAs 10-13-21

The number of horses shipped has not been included in the cumulative totals and the figure above is based on the daily reports.

If 4,032 horses have been captured as stated at the gather page, 3,476 have been shipped and 37 have died, the maximum number of horses that could be returned to the area is 519, not 580 as stated in the cumulative totals.  The numbers don’t balance.

The number of horses removed to date, based on the cumulative totals, is 3,452, about 99% of the project goal.

Other statistics:

  • AML: 2,165 (across five HMAs)
  • Forage assigned to horses: 25,980 AUMs per year
  • Pre-gather population: 5,105
  • Forage liberated to date: 42,444 AUMs per year, adjusted for horses returned
  • Water liberated to date: 35,370 gallons per day, adjusted for horses returned
  • Forage assigned to livestock: 191,791 AUMs per year (estimated)
  • Horses displaced from HMAs by livestock: 15,982 (32% of off-range holding)
  • True AML: 18,147

RELATED: Rock Springs Roundup Day 99.

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