| Ree Scoria PitDawson, MTNear GlendiveMSHA 2402664 | Construction Sand and GravelSurface | AbandonedStatus date: 09/09/2014 | Operator not reportedReported operatorController not reportedReported controller | Neither history importedView source coverage → |
| Rehbein Portable CrusherSanders, MTMSHA 2401542 | Construction Sand and GravelSurface | AbandonedStatus date: 03/14/1983 | Rehbein Contracting IncReported operatorDouglas RehbeinReported controller | Neither history importedView source coverage → |
| Relyea MillPowell, MTMSHA 2400150 | Phosphate RockSurface | AbandonedStatus date: 10/03/1984 | Relyea MiningReported operatorRelyea MiningReported controller | Neither history importedView source coverage → |
| R E Miller & Sons - Sprint ScreenBeaverhead, MTNear DillonMSHA 2402446 | Construction Sand and GravelSurface | AbandonedStatus date: 05/20/2006 | R E Miller & SonsReported operatorRex Leipheimer; John JefferyReported controller | Production / employmentView source coverage → |
| Revier PitSanders, MTNear PlainsMSHA 2402524 | Crushed, Broken Stone NECSurface | AbandonedStatus date: 02/05/2021 | J & K Revier TruckingReported operatorJohn D RevierReported controller | Production / employmentSafety recordsView source coverage → |
| Rexford PitLincoln, MTNear EurekaMSHA 2402557 | Construction Sand and GravelSurface | AbandonedStatus date: 09/01/2009 | R. E. HarrellReported operatorR.E. HarrellReported controller | Production / employmentSafety recordsView source coverage → |
| Reynolds City ClaimGranite, MTMSHA 2401902 | Gold OreSurface | AbandonedStatus date: 07/18/1990 | Skyland MiningReported operatorTakle Robert DReported controller | Neither history importedView source coverage → |
| Richardson Sand & Gravel PitStillwater, MTMSHA 2401226 | Construction Sand and GravelSurface | AbandonedStatus date: 11/29/1983 | Richardson Sand & Gravel Company IncReported operatorRichardson Sand & Gravel Company IncReported controller | Neither history importedView source coverage → |
| RICHARDS PITMissoula, MTNear Seeley LakeMSHA 2402070 | Construction Sand and GravelSurface | AbandonedStatus date: 04/13/2026 | John Richards ConstReported operatorJohn RichardsReported controller | Production / employmentSafety recordsView source coverage → |
| Richem Construction Inc PitTeton, MTNear ChoteauMSHA 2400452 | Construction Sand and GravelSurface | AbandonedStatus date: 12/08/2021 | Richem Construction IncReported operatorPaul Hinderager; Cynthia M HayworthReported controller | Production / employmentSafety recordsView source coverage → |
| Richland PortableRichland, MTMSHA 2402033 | Construction Sand and GravelSurface | AbandonedStatus date: 04/08/1994 | Richland CountyReported operatorRichland County-MtReported controller | Neither history importedView source coverage → |
| RICHLAND PORTABLERichland, MTNear SidneyMSHA 2402092 | Construction Sand and GravelSurface | AbandonedStatus date: 02/22/2024 | Richland County Public WorksReported operatorRichland County-MtReported controller | Production / employmentSafety recordsView source coverage → |
| Ridgeway MineMadison, MTMSHA 2401631 | Gold OreUnderground | AbandonedStatus date: 09/20/1982 | Ridgeway Mining CompanyReported operatorRidgeway Mining CompanyReported controller | Neither history importedView source coverage → |
| Rip Rap QuarryLake, MTMSHA 2402036 | Dimension Stone NECSurface | AbandonedStatus date: 01/28/1994 | L A Construction--Dick Anderson Construction-J VReported operatorL A Construction--Dick Anderson Construction-J VReported controller | Neither history importedView source coverage → |
| River Gravel LLCGallatin, MTNear BelgradeMSHA 2402478 | Crushed, Broken Stone NECSurface | AbandonedStatus date: 03/25/2008 | River Gravel LLCReported operatorBob L Radcliffe; Kenneth P WilliamsReported controller | Production / employmentSafety recordsView source coverage → |
| River Pit Wash PlantFlathead, MTNear KalispellMSHA 2402110 | Construction Sand and GravelSurface | AbandonedStatus date: 02/24/2009 | Knife River Reported operatorKnife River CorporationReported controller | Production / employmentSafety recordsView source coverage → |
| Riverside Contracting Inc 2Broadwater, MTNear TostonMSHA 2402687 | Construction Sand and GravelSurface | AbandonedStatus date: 06/02/2015 | Operator not reportedReported operatorController not reportedReported controller | Neither history importedView source coverage → |
| RIVERSIDE GRAVELStillwater, MTNear ColumbusMSHA 2401982 | Construction Sand and GravelSurface | AbandonedStatus date: 07/31/2002 | Riverside GravelReported operatorDolores RileyReported controller | Production / employmentSafety recordsView source coverage → |
| Riverside PlacerJefferson, MTMSHA 2401680 | Gold OreSurface | AbandonedStatus date: 02/11/1983 | Montana Placer Company IncReported operatorMontana Placer Company IncReported controller | Neither history importedView source coverage → |
| Riverside ProspectSanders, MTMSHA 2401922 | Lead-Zinc OreUnderground | AbandonedStatus date: 10/05/1990 | Riverside Prospect IncReported operatorRiverside Prospect IncReported controller | Neither history importedView source coverage → |
| River TradersSanders, MTNear PlainsMSHA 2402258 | Dimension SlateSurface | AbandonedStatus date: 01/18/2005 | River TradersReported operatorClint GerberReported controller | Production / employmentSafety recordsView source coverage → |
| R J WilliamsMissoula, MTMSHA 2401818 | Construction Sand and GravelSurface | AbandonedStatus date: 07/14/1987 | R J WilliamsReported operatorR J WilliamsReported controller | Neither history importedView source coverage → |
| Road shop staging areaPark, MTNear LivingstonMSHA 2402796 | Construction Sand and GravelSurface | AbandonedStatus date: 04/13/2026 | Park County RoadReported operatorPark County-MtReported controller | Production / employmentSafety recordsView source coverage → |
| Roadside Mine UgCarbon, MTMSHA 2400092 | Coal (Bituminous)Underground | AbandonedStatus date: 02/12/1971 | Roadside Coal CompanyReported operatorRoadside Coal CompanyReported controller | Neither history importedView source coverage → |
| Robin Rock WorksFlathead, MTNear KalispellMSHA 2402276 | Crushed, Broken Stone NECSurface | AbandonedStatus date: 03/22/2005 | Robin Rock WorksReported operatorWilliam E FishReported controller | Neither history importedView source coverage → |
| Robin's Contracting, Inc. / Tompkins PitSanders, MTNear PlainsMSHA 2402323 | Construction Sand and GravelSurface | AbandonedStatus date: 07/11/2005 | Robin's Contracting, Inc.Reported operatorChari L Wipplinger; Douglas W WipplingerReported controller | Production / employmentSafety recordsView source coverage → |
| Robison MineMadison, MTNear EnnisMSHA 2402503 | Construction Sand and GravelSurface | AbandonedStatus date: 01/01/2009 | Paydirt Exc IncReported operatorPaul A YennyReported controller | Production / employmentSafety recordsView source coverage → |
| RochesterMadison, MTNear Twin BridgesMSHA 2402731 | Construction Sand and GravelSurface | AbandonedStatus date: 02/05/2019 | Operator not reportedReported operatorController not reportedReported controller | Neither history importedView source coverage → |
| Rochester MillMadison, MTNear Twin BridgesMSHA 2402333 | Gold OreFacility | AbandonedStatus date: 08/05/2013 | Snowy Mountain Holdings IncReported operatorDelaney Robert LReported controller | Production / employmentSafety recordsView source coverage → |
| Rock Bottom #1Yellowstone, MTNear LaurelMSHA 2402398 | Construction Sand and GravelSurface | AbandonedStatus date: 06/06/2025 | David RuffReported operatorDavid A RuffReported controller | Production / employmentSafety recordsView source coverage → |