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Miles City Field Office
Release Date: 12/06/13

American Colloid draft environmental assessment available

MILES CITY, MT. --- The draft environmental assessment for American Colloid Company’s proposal to amend its bentonite mine plan near Alzada in Carter County is now available for public comment.

Written comments will be accepted until Jan. 10, 2014. 

The American Colloid Company submitted a Plan of Operations amendment to the Bureau of Land Management Miles City Field Office and the Montana Department of Environmental Quality to amend its mine plan for bentonite mining in Carter County. Amendment No. 13 proposes to increase the permit area by 2,051 acres, of which 1,649 acres are Federal (BLM-administered) and 401 acres are under private ownership. 

Surface disturbance would not be authorized on all the lands within the permit boundary.

Following the 30-day comment period, the BLM and MDEQ will make separate decisions whether or not to approve the proposed action identified in the EA.

The document may be requested from the BLM Miles City Field Office or accessed via the web at:

Comments may be submitted by email at:, or by regular mail to: BLM Miles City Field Office, Attn: Nate Arave, 111 Garryowen Road, Miles City, MT 59301.

Those providing comments are advised that before including address, phone number, e-mail address, or other personal identifying information, that their entire comment – including personal identifying information – may be made publicly available at any time.  While those commenting can ask in their comments to withhold personal identifying information from public review, the BLM cannot guarantee that they will be able to do so. 

For more information about the EA contact Nate Arave at (406) 233-3163.

The BLM manages more than 245 million acres of public land, the most of any Federal agency. This land, known as the National System of Public Lands, is primarily located in 12 Western states, including Alaska. The BLM also administers 700 million acres of sub-surface mineral estate throughout the nation. The BLM's mission is to sustain the health, diversity, and productivity of America’s public lands for the use and enjoyment of present and future generations. In Fiscal Year 2015, the BLM generated $4.1 billion in receipts from activities occurring on public lands.

Miles City Field Office   111 Garryowen Road      Miles City, MT 59301  

Last updated: 12-10-2013