| BlackjackBlaine, MTNear Chinook MontanaMSHA 2401510 | Coal (Bituminous)Surface | Abandoned and SealedStatus date: 12/01/1980 | Blaine WarburtonReported operatorWarburton BlaineReported controller | Neither history importedView source coverage → |
| Black Jack Slate & StoneBeaverhead, MTNear PumaMSHA 2402299 | Dimension Stone NECSurface | AbandonedStatus date: 03/17/2008 | Black Jack Slate & StoneReported operatorDARRIN CLOUSEReported controller | Neither history importedView source coverage → |
| Black Patchmine ClaimsJefferson, MTMSHA 2401782 | Gold OreSurface | AbandonedStatus date: 06/27/1985 | A-Gem Exploration & Mining Company IncReported operatorRoy L ArmstrongReported controller | Neither history importedView source coverage → |
| Black Pine MineGolden Valley, MTMSHA 2401147 | Misc. Nonmetallic Mnls. NECUnderground | AbandonedStatus date: 03/09/1994 | Asarco IncReported operatorAsarco IncReported controller | Neither history importedView source coverage → |
| Black WidowLewis And Clark, MTMSHA 2401526 | Gold OreUnderground | AbandonedStatus date: 08/21/1980 | Leroy MckellarReported operatorLeroy MckellarReported controller | Neither history importedView source coverage → |
| Blahnik PortableRavalli, MTNear HamiltonMSHA 2401910 | Construction Sand and GravelSurface | AbandonedStatus date: 03/25/2006 | Blahnik Construction IncReported operatorCRH PLCReported controller | Production / employmentSafety recordsView source coverage → |
| Blaine Ready MixBlaine, MTNear ChinookMSHA 2401995 | Construction Sand and GravelSurface | AbandonedStatus date: 08/22/2003 | Blaine Ready Mix IncReported operatorDean Van VoastReported controller | Production / employmentSafety recordsView source coverage → |
| Blaine Sand & GravelBlaine, MTMSHA 2401397 | Construction Sand and GravelSurface | AbandonedStatus date: 12/16/1983 | Blaine Sand & GravelReported operatorCedarberg Brice CReported controller | Neither history importedView source coverage → |
| BLM BENT #4Valley, MTNear GlasgowMSHA 2402691 | Clay, Ceramic, Refractory Mnls.Surface | AbandonedStatus date: 10/29/2019 | Imerys Minerals USA, Inc.Reported operatorPlatinum Equity LLCReported controller | Production / employmentView source coverage → |
| BLM SCREEN PLANTFergus, MTMSHA 2402106 | Construction Sand and GravelSurface | AbandonedStatus date: 11/05/2001 | U S Bureau Of Land ManagementReported operatorUnited States GovernmentReported controller | Production / employmentSafety recordsView source coverage → |
| Blue Bird MineLincoln, MTMSHA 2401423 | Silver OreUnderground | AbandonedStatus date: 07/26/1985 | Libby Resources IncReported operatorLibby Resources IncReported controller | Neither history importedView source coverage → |
| Blue Moon PitFlathead, MTNear Columbia FallsMSHA 2400500 | Construction Sand and GravelSurface | AbandonedStatus date: 07/28/2022 | Hamilton Sand & Gravel LLCReported operatorHoward D HamiltonReported controller | Production / employmentSafety recordsView source coverage → |
| Blue Moon PitFlathead, MTMSHA 2401729 | Construction Sand and GravelSurface | AbandonedStatus date: 08/01/1984 | Lawrence NesuacilReported operatorLawrence NesuacilReported controller | Neither history importedView source coverage → |
| B & N PortableFallon, MTMSHA 2400866 | Crushed, Broken Stone NECSurface | AbandonedStatus date: 08/11/1986 | B & N ConstructionReported operatorHufford Gordon AReported controller | Neither history importedView source coverage → |
| B & N Portable CrusherPark, MTMSHA 2401495 | Construction Sand and GravelSurface | AbandonedStatus date: 10/29/1984 | B & N Construction IncReported operatorArthur R BrandReported controller | Neither history importedView source coverage → |
| Boaz MineBeaverhead, MTNear ArgentaMSHA 2402824 | Gold OreUnderground | AbandonedStatus date: 01/13/2026 | Yellow Band Operating LLCReported operatorGold Express Mines IncReported controller | Production / employmentSafety recordsView source coverage → |
| Boaz Mine GroupMadison, MTMSHA 2401943 | Gold OreSurface | AbandonedStatus date: 04/29/1993 | Gold Eagle MillReported operatorHansard Don & Randy MackReported controller | Neither history importedView source coverage → |
| Boisverts HillLincoln, MTNear PlainsMSHA 2402378 | Dimension Stone NECSurface | AbandonedStatus date: 11/26/2007 | Operator not reportedReported operatorController not reportedReported controller | Neither history importedView source coverage → |
| Bokma PitPondera, MTMSHA 2400831 | Construction Sand and GravelSurface | AbandonedStatus date: 04/09/1984 | Rocky Mountain Ready MixReported operatorLewis Gary AReported controller | Neither history importedView source coverage → |
| Bon-AccordBeaverhead, MTMSHA 2401972 | Gold OreSurface | AbandonedStatus date: 06/30/1993 | Tri-State ConsultingReported operatorGoddard RogerReported controller | Neither history importedView source coverage → |
| BON ACCORD VENTUREBeaverhead, MTNear DillonMSHA 2402190 | Gold OreSurface | AbandonedStatus date: 08/28/2002 | P K M MiningReported operatorMarty PuryerReported controller | Production / employmentSafety recordsView source coverage → |
| Bonanza MineGranite, MTMSHA 2401564 | Silver OreUnderground | AbandonedStatus date: 05/21/1981 | Allan LoobeyReported operatorAllan LoobeyReported controller | Neither history importedView source coverage → |
| Bonser ConstructionCascade, MTNear FairfieldMSHA 2402368 | Construction Sand and GravelSurface | AbandonedStatus date: 07/20/2006 | Bonser ContructionReported operatorGeorge William BonserReported controller | Production / employmentSafety recordsView source coverage → |
| Boroni Portable CrusherSilver Bow, MTMSHA 2401509 | Construction Sand and GravelSurface | AbandonedStatus date: 06/24/1988 | Boroni Construction CompanyReported operatorBoroni FrankReported controller | Neither history importedView source coverage → |
| Bosal #1 ClaimMadison, MTMSHA 2401431 | TalcUnderground | AbandonedStatus date: 10/23/1979 | Cyprus Industrial Minerals CompanyReported operatorCyprus Amax Minerals CompanyReported controller | Neither history importedView source coverage → |
| Boss TweedMadison, MTMSHA 2401407 | Gold OreSurface | AbandonedStatus date: 03/19/1987 | Denimil Resources (Us) IncReported operatorEngel Frank & MichaelReported controller | Neither history importedView source coverage → |
| Boulder Chief MineJefferson, MTMSHA 2401011 | Silver OreUnderground | AbandonedStatus date: 05/02/1985 | Watkins EnterprizesReported operatorWatkins FrankReported controller | Neither history importedView source coverage → |
| Bowman Ranch PitCascade, MTNear BeltMSHA 2402810 | Construction Sand and GravelSurface | AbandonedStatus date: 08/06/2026 | Whiskey Bent, Inc.Reported operatorGlen (OJ) Mortensen JrReported controller | Production / employmentView source coverage → |
| Boyles Brothers Drill SiteCascade, MTMSHA 2401391 | Molybdenum OreSurface | AbandonedStatus date: 06/13/1978 | Boyles BrothersReported operatorBoyles BrothersReported controller | Neither history importedView source coverage → |
| Bozeman Sand & Gravel PitGallatin, MTMSHA 2401214 | Construction Sand and GravelSurface | AbandonedStatus date: 09/02/1988 | Midland O'Leary IncReported operatorDean StuderReported controller | Neither history importedView source coverage → |