| Date | Facility | Type of Activity |
|---|---|---|
| 07/23/2008 | Minor Revision 08-001 to the Bighorn Limestone Company |
Request for a revision to build a new truck dump, rail load out, and haul road near the existing rail loading area. Warren Quarry near Warren, MT |
| 05/14/07 | Elkhorn Goldfields | Operating Plan and Application for an Operating Permit Boulder MT |
| 6/20/06 | Big Horn Limestone Company | Operating Permit Amendment for Warren Limestone Quarry/Permit #00008 Warren Montana Area |
| 07/11/06 | Northfork Stoneworks | Operating Permit Application for Rock Products |
| 06/07/06 | Ruby Valley Garnet LLC | Red Wash Mine Amendment Madison County |
| 4/16/06 | Genesis Inc. Troy Mine |
Revised Reclamation Plan |
| 02/22/06 | Graymont Western US Inc. | Operating and Reclamation Plan Indian Creek Mine Plant Broadwater County |
| 2/03/06 | Barretts Minerals Inc. Regal Mine |
Life-of-Mine Expansion Plan Madison County |
| 01/31/06 | Apex Abrasives Mill-Tailings | Operating Plan and Application for an Operating Permit Glen & Beaverhead Counties |
