The tally includes around 400 wild horses living outside the herd management areas.
"We are proposing this action to return the wild horse population in the complex to its appropriate management level of 228 to 385 horses," said Allen Bollschweiller, manager of the bureau's Surprise field office in Cedarville, California.
"We estimate the current population at 885 to 930 horses. We also propose removing about 400 wild horses that are outside of established herd management areas."
A preliminary document will be released for public review and comment in February.
Comments are being accepted during a 30-day scoping period that opened on December 15, 2010, and closes on January 15, 2011. Comments should be mailed to: Bureau of Land Management, PO Box 460, Cedarville, CA 96104, Attention wild horse gather; or sent by email to email@example.com.