| Sheep Mtn MineFergus, MTMSHA 2401291 | Gold OreUnderground | AbandonedStatus date: 01/14/1980 | Sheep Mtn Mining CoReported operatorSheep Mtn Mining CoReported controller | Neither history importedView source coverage → |
| Shenandoah MinesMadison, MTNear Virginia CityMSHA 2402679 | Gold OreUnderground | AbandonedStatus date: 10/31/2014 | Kern River LLCReported operatorAdam StullReported controller | Neither history importedView source coverage → |
| SheridanMadison, MTNear SheridanMSHA 2402640 | Crushed, Broken Stone NECSurface | AbandonedStatus date: 09/11/2013 | Pumco IncReported operatorBrett PumneaReported controller | Production / employmentSafety recordsView source coverage → |
| Sheridan Ready MixSheridan, MTNear PlentywoodMSHA 2400792 | Construction Sand and GravelSurface | AbandonedStatus date: 12/06/2018 | Montana Aggregate Holdings IncReported operatorTravis HaynesReported controller | Production / employmentSafety recordsView source coverage → |
| Sheryl Ann IncorporatedCascade, MTNear Great FallsMSHA 2402701 | Construction Sand and GravelSurface | AbandonedStatus date: 12/08/2016 | Sheryl Ann IncorporatedReported operatorSheryl A ChabarriaReported controller | Neither history importedView source coverage → |
| Sickler Shale & Gravel Portable CrusherFlathead, MTNear MarionMSHA 2402372 | Construction Sand and GravelSurface | AbandonedStatus date: 08/07/2015 | Sickler Shale & Gravel, Inc.Reported operatorNorman K HansonReported controller | Production / employmentSafety recordsView source coverage → |
| Sidney PitYellowstone, MTMSHA 2401625 | Construction Sand and GravelSurface | AbandonedStatus date: 07/09/1987 | Fisher Sand & Gravel CompanyReported operatorThomas G FisherReported controller | Neither history importedView source coverage → |
| Sierra Rock & Dirt IncCascade, MTNear Great FallsMSHA 2402115 | Construction Sand and GravelSurface | AbandonedStatus date: 05/02/2017 | Sierra Rock & Dirt, Inc.Reported operatorRick McDanielReported controller | Production / employmentSafety recordsView source coverage → |
| Silica QuarryGallatin, MTMSHA 2401464 | Construction Sand and GravelSurface | AbandonedStatus date: 07/22/1981 | Janney Construction Company IncReported operatorJanney EdReported controller | Neither history importedView source coverage → |
| Silver ApexPowell, MTMSHA 2401428 | Silver OreUnderground | AbandonedStatus date: 09/04/1980 | Joe Heisdorf Silver ApexReported operatorHeisdorf JosephReported controller | Neither history importedView source coverage → |
| Silver Bell MineMissoula, MTMSHA 2401670 | Copper Ore NECUnderground | AbandonedStatus date: 12/22/1982 | Silver Bell MiningReported operatorKoepke MarieReported controller | Neither history importedView source coverage → |
| Silver Bow PlantSilver Bow, MTMSHA 2400151 | Crushed, Broken SandstoneFacility | AbandonedStatus date: 05/21/1982 | Rhone-Poulenc Basic Chemicals CompanyReported operatorRhone-Poulenc S AReported controller | Neither history importedView source coverage → |
| Silver BullionMadison, MTMSHA 2401579 | Silver OreSurface | AbandonedStatus date: 09/04/1981 | Alder Gulch Trucking CompanyReported operatorScheitlin Edward EReported controller | Neither history importedView source coverage → |
| Silver ButteLincoln, MTMSHA 2400551 | Silver OreUnderground | AbandonedStatus date: 07/28/1982 | Berscham Energy & Mineral IncReported operatorChambers KevinReported controller | Neither history importedView source coverage → |
| Silver City Sand & GravelLewis And Clark, MTNear HelenaMSHA 2402393 | Construction Sand and GravelSurface | AbandonedStatus date: 01/03/2006 | Silver City Sand & Gravel LLPReported operatorHelmer Howard Anderson; Andre Bowen PhillipsReported controller | Production / employmentView source coverage → |
| Silver CrownMadison, MTMSHA 2401528 | Silver OreUnderground | AbandonedStatus date: 03/13/1981 | Silver Crown Mines IncReported operatorSilver Crown Mines IncReported controller | Neither history importedView source coverage → |
| Silver King MineGranite, MTMSHA 2400942 | Silver OreUnderground | AbandonedStatus date: 07/28/1982 | Northwest Gold IncReported operatorSmith DonReported controller | Neither history importedView source coverage → |
| Silver Lake Gravel PitDeer Lodge, MTMSHA 2401938 | Construction Sand and GravelSurface | AbandonedStatus date: 08/20/1991 | Silver Securities IncReported operatorDegenhart ClintReported controller | Neither history importedView source coverage → |
| Silver ReefGranite, MTMSHA 2401592 | Silver OreUnderground | AbandonedStatus date: 09/18/1981 | C & G Mining CompanyReported operatorC & G Mining CompanyReported controller | Neither history importedView source coverage → |
| Silver RidgeBeaverhead, MTMSHA 2401662 | Gold OreUnderground | AbandonedStatus date: 07/11/1984 | S & S Diversified IncReported operatorSiaperas JohnReported controller | Neither history importedView source coverage → |
| Silver SleepersDeer Lodge, MTNear Virgina CityMSHA 2402483 | Silver OreUnderground | AbandonedStatus date: 11/27/2007 | R & D Exploration and Development LLCReported operatorRalph A Johnsrud; Debbie S JohnsrudReported controller | Neither history importedView source coverage → |
| Silver Spruce LeachingGranite, MTMSHA 2401646 | Gold OreFacility | AbandonedStatus date: 07/12/1982 | Silver Spruce Mining CompanyReported operatorPaige B GReported controller | Neither history importedView source coverage → |
| Sir Walter ScottJudith Basin, MTMSHA 2401774 | Silver OreSurface | AbandonedStatus date: 05/07/1985 | Running Wolf MiningReported operatorRunning Wolf MiningReported controller | Neither history importedView source coverage → |
| Six 0 Six Holding LLCLewis And Clark, MTNear TOWNSENDMSHA 2402758 | Gold OreSurface | AbandonedStatus date: 02/05/2021 | Six 0 Six HoldingsReported operatorDavid H ThulosReported controller | Neither history importedView source coverage → |
| S J Kenney Portable CrusherBig Horn, MTMSHA 2401517 | Construction Sand and GravelSurface | AbandonedStatus date: 09/06/1988 | S J Kenney Construction IncReported operatorS J Kenney Construction IncReported controller | Neither history importedView source coverage → |
| Skalkaho MineGranite, MTMSHA 2401931 | GemstonesSurface | AbandonedStatus date: 07/03/1995 | Skalkaho Grazing IncReported operatorGoode RolandReported controller | Neither history importedView source coverage → |
| Skyline D and E #2 Portable CrusherFlathead, MTNear Columbia FallsMSHA 2402618 | Construction Sand and GravelSurface | AbandonedStatus date: 07/20/2015 | Skyline Dredging & ExcavatingReported operatorMark A HerzogReported controller | Production / employmentSafety recordsView source coverage → |
| Skyline Dredging & Exc.-Portable CrusherFlathead, MTNear Columbia FallsMSHA 2402345 | Construction Sand and GravelSurface | AbandonedStatus date: 09/10/2020 | Skyline Dredging & ExcavatingReported operatorMark A HerzogReported controller | Production / employmentSafety recordsView source coverage → |
| Slag CrusherDeer Lodge, MTMSHA 2401618 | Copper Ore NECFacility | AbandonedStatus date: 07/01/1981 | Grey Rock Trucking Company IncReported operatorGrey Rock Trucking Company IncReported controller | Neither history importedView source coverage → |
| Sletten CrushingCascade, MTMSHA 2401759 | Crushed, Broken Stone NECSurface | AbandonedStatus date: 07/30/1986 | Sletten Construction CompanyReported operatorSletten RobertReported controller | Neither history importedView source coverage → |