| Montana Frontier SandStone LLCGolden Valley, MTNear RyegateMSHA 2402705 | Dimension SandstoneSurface | AbandonedStatus date: 12/08/2016 | Montana Frontier SandStone LLCReported operatorBruce Barth; Marie BarthReported controller | Neither history importedView source coverage → |
| Montana Gold & SapphireLewis And Clark, MTMSHA 2401473 | Gold OreSurface | AbandonedStatus date: 09/12/1986 | Montana Gold & Sapphire IncReported operatorMontana Gold & Sapphire IncReported controller | Neither history importedView source coverage → |
| MONTANA LIMESTONE COMPANYCarbon, MTNear CarbonMSHA 2400006 | Crushed, Broken Limestone NECSurface | AbandonedStatus date: 02/05/2003 | Montana Limestone CompanyReported operatorJames W WeaverReported controller | Production / employmentSafety recordsView source coverage → |
| Montana Limestone CompanyCarbon, MTMSHA 2401860 | Crushed, Broken Limestone NECFacility | AbandonedStatus date: 01/07/1992 | Montana Limestone CompanyReported operatorJames W WeaverReported controller | Neither history importedView source coverage → |
| Montana Natural Stone LLCSanders, MTNear PlainsMSHA 2402416 | Crushed, Broken SandstoneSurface | AbandonedStatus date: 01/01/2009 | Montana Natural Stone LLCReported operatorMichael W McClellan; Barbara K FowlerReported controller | Production / employmentSafety recordsView source coverage → |
| MONTANA SAND & GRAVEL PORTABLE #Cascade, MTMSHA 2401977 | Construction Sand and GravelSurface | AbandonedStatus date: 10/27/2000 | United Materials Of Great Falls IncReported operatorLonnie AndersonReported controller | Production / employmentSafety recordsView source coverage → |
| Montana Solid Rock Quarry #1Sanders, MTNear Thompson FallsMSHA 2402425 | Dimension Stone NECSurface | AbandonedStatus date: 05/03/2024 | Montana Solid Rock Quarry, IncReported operatorRobyn DuffyReported controller | Production / employmentSafety recordsView source coverage → |
| Montana Talc CompanyGallatin, MTMSHA 2401809 | TalcFacility | AbandonedStatus date: 06/24/1994 | Montana Talc CompanyReported operatorCostain Group PlcReported controller | Neither history importedView source coverage → |
| Montana Tunnels Mining IncJefferson, MTNear Jefferson CityMSHA 2401769 | Gold OreSurface | AbandonedStatus date: 04/01/2019 | Montana Tunnels Mining IncReported operatorEastern Resources, Inc.Reported controller | Production / employmentSafety recordsView source coverage → |
| MontanoreLincoln, MTMSHA 2401895 | Silver OreUnderground | AbandonedStatus date: 10/30/1995 | Noranda Minerals CorpReported operatorNoranda IncReported controller | Neither history importedView source coverage → |
| Montanore MineLincoln, MTMSHA 2401905 | Silver OreUnderground | AbandonedStatus date: 12/13/1989 | Gilbert/Dynatec J/VReported operatorGilbert/Dynatec J/VReported controller | Neither history importedView source coverage → |
| MontcoRosebud, MTNear BillingsMSHA 2401640 | Coal (Bituminous)Surface | Abandoned and SealedStatus date: 02/19/1986 | MontcoReported operatorTongue River Resources Inc & Thermal Energy IncReported controller | Neither history importedView source coverage → |
| Montgomery CrusherFergus, MTNear HilgerMSHA 2401889 | Construction Sand and GravelSurface | AbandonedStatus date: 02/19/2004 | Montgomery ConstructionReported operatorJohn MontgomeryReported controller | Production / employmentSafety recordsView source coverage → |
| Montgomery MineJudith Basin, MTMSHA 2401531 | Lead-Zinc OreSurface | AbandonedStatus date: 07/08/1981 | Carwyn EiermanReported operatorEierman CarwynReported controller | Neither history importedView source coverage → |
| Montreal MineSilver Bow, MTMSHA 2401667 | Gold OreUnderground | AbandonedStatus date: 07/17/1984 | Northmont Resource & Exploration CompanyReported operatorAntonioli Peter SReported controller | Neither history importedView source coverage → |
| Moore PeaveyFergus, MTNear LewistownMSHA 2402507 | Construction Sand and GravelSurface | AbandonedStatus date: 02/26/2018 | Niebur Excavating LLCReported operatorJohn NieburReported controller | Production / employmentSafety recordsView source coverage → |
| Mortensen Portable CrusherCascade, MTMSHA 2400436 | Construction Sand and GravelSurface | AbandonedStatus date: 07/30/1981 | Mortensen Construction CompanyReported operatorMortensen GlenReported controller | Neither history importedView source coverage → |
| Mortensen Portable CrusherCascade, MTMSHA 2401398 | Crushed, Broken Stone NECSurface | AbandonedStatus date: 11/14/1980 | Mortensen Construction CompanyReported operatorMortensen GlenReported controller | Neither history importedView source coverage → |
| Mortensen Portable Crusher 2Cascade, MTMSHA 2401403 | Construction Sand and GravelSurface | AbandonedStatus date: 11/19/1979 | Mortensen Construction CompanyReported operatorMortensen GlenReported controller | Neither history importedView source coverage → |
| Mossmain Sand & Gravel PitYellowstone, MTMSHA 2401402 | Construction Sand and GravelSurface | AbandonedStatus date: 07/01/1981 | Mossmain Industrial Park IncReported operatorMossmain Industrial Park IncReported controller | Neither history importedView source coverage → |
| Moudy PitRavalli, MTNear VictorMSHA 2402752 | Construction Sand and GravelSurface | AbandonedStatus date: 12/08/2021 | Operator not reportedReported operatorController not reportedReported controller | Neither history importedView source coverage → |
| Moulton MineBroadwater, MTMSHA 2400448 | Gold OreUnderground | AbandonedStatus date: 05/14/1984 | Westgate Mining & Construction IncReported operatorMowlem John PlcReported controller | Neither history importedView source coverage → |
| Mountain View Gravel Pit/Morten PitRavalli, MTNear HamiltonMSHA 2402565 | Construction Sand and GravelSurface | AbandonedStatus date: 05/13/2010 | Advanced Earthworks IncReported operatorScott Schmiedeke; Mark O BarteauxReported controller | Neither history importedView source coverage → |
| Mountain View MineStillwater, MTMSHA 2401882 | Chromite Chromium OreUnderground | AbandonedStatus date: 06/21/1990 | Chrome Corp Of AmericaReported operatorBoulder Gold NlReported controller | Neither history importedView source coverage → |
| Mountain View MineStillwater, MTMSHA 2401883 | Chromite Chromium OreUnderground | AbandonedStatus date: 01/28/1989 | Chrome Corp Of AmericaReported operatorChrome Corp Of AmericaReported controller | Neither history importedView source coverage → |
| Mp MineMadison, MTMSHA 2401945 | TalcSurface | AbandonedStatus date: 08/17/1992 | Luzenac America, Inc.Reported operatorImerys S AReported controller | Neither history importedView source coverage → |
| MRM crusherPhillips, MTNear MaltaMSHA 2402702 | Construction Sand and GravelSurface | AbandonedStatus date: 12/08/2016 | Malta Ready MixReported operatorBrandon MillicanReported controller | Neither history importedView source coverage → |
| MRM MOBILE CRUSHER #176Lake, MTNear MissoulaMSHA 2402135 | Construction Sand and GravelSurface | AbandonedStatus date: 02/09/2004 | JTL Group IncorporatedReported operatorKnife River CorporationReported controller | Production / employmentSafety recordsView source coverage → |
| MRM WASH PLANT #170Missoula, MTNear MissoulaMSHA 2400486 | Construction Sand and GravelSurface | AbandonedStatus date: 01/03/2007 | JTL Group IncorporatedReported operatorKnife River CorporationReported controller | Production / employmentSafety recordsView source coverage → |
| MUGGLI PITCuster, MTNear Miles CityMSHA 2402118 | Dimension Stone NECSurface | AbandonedStatus date: 09/23/2003 | Muggli Construction LlcReported operatorJohn Muggli; Michelle MuggliReported controller | Production / employmentSafety recordsView source coverage → |