HISTORICAL SITES / RESEARCH DIRECTORY

Abandoned mines in California

Find the public record behind a former mining site. Explore reported locations, mined materials and operating history as a starting point for acquisition, reuse or reclamation research.

2,021 matching recordsMSHA snapshot · 2026-10-31

Browse all states →

Reset

History means records exist in the imported sources, including older periods. Missing history is not evidence of a clean safety record. Operator and controller names are the last relationships reported in the Mines snapshot; they are not verified current property owners.

Mine / reported locationMaterial / typeReported statusReported relationshipsAvailable history
Borello Ranch QuarryMarin, CAMSHA 0405144Crushed, Broken Stone NECSurfaceAbandonedStatus date: 08/26/1993Borello Ranch QuarryReported operatorBorello Robert AReported controllerNeither history importedView source coverage →
BoronKern, CANear BoronMSHA 0405671Boron MineralsSurfaceAbandonedStatus date: 05/30/2008Carlton Global Resources, LLCReported operatorSelect Resources; Main Capital Partners LLCReported controllerProduction / employmentSafety recordsView source coverage →
BORON OPERATIONS UNDERGROUND MINKern, CANear kernMSHA 0405366Boron MineralsUndergroundAbandonedStatus date: 05/04/2001U S Borax IncReported operatorRio Tinto GroupReported controllerProduction / employmentSafety recordsView source coverage →
Boron RefineryKern, CAMSHA 0403886Boron MineralsFacilityAbandonedStatus date: 01/01/1987United States Borax & Chemical CorpReported operatorRio Tinto GroupReported controllerNeither history importedView source coverage →
Boseker Ranch Channel Rehabilitation ProSan Diego, CAMSHA 0405198Construction Sand and GravelSurfaceAbandonedStatus date: 03/04/1996Burl Stolworthy Flood Control MaintenanceReported operatorStolworthy BurlReported controllerNeither history importedView source coverage →
Bostrum TalcInyo, CAMSHA 0404892TalcUndergroundAbandonedStatus date: 01/01/1988Cal-Vada MiningReported operatorSchmeling Max & MikeReported controllerNeither history importedView source coverage →
Bottlerock AggregatesLake, CAMSHA 0404609Crushed, Broken Stone NECSurfaceAbandonedStatus date: 11/07/1984Baldwin Contracting Company IncReported operatorM & T IncReported controllerNeither history importedView source coverage →
Boulder Bar Placer MineSiskiyou, CAMSHA 0405047Gold OreSurfaceAbandonedStatus date: 07/23/1990Earl AndersReported operatorAnders EarlReported controllerNeither history importedView source coverage →
Boulevard PlantLos Angeles, CAMSHA 0401742Construction Sand and GravelSurfaceAbandonedStatus date: 05/14/1992Calmat CompanyReported operatorCalmat CompanyReported controllerNeither history importedView source coverage →
Bowman Canyon Quarry IncorporatedMarin, CAMSHA 0405221Crushed, Broken Stone NECSurfaceAbandonedStatus date: 05/15/1995Bowman Canyon Quarry IncReported operatorMarvin K SoilandReported controllerNeither history importedView source coverage →
BOWMAN PITKern, CANear ridgecrestMSHA 0404739Construction Sand and GravelSurfaceAbandonedStatus date: 04/04/2007Holliday Rock Company Inc.Reported operatorPenny J HollidayReported controllerProduction / employmentSafety recordsView source coverage →
Bowstring OperationKern, CANear RandsburgMSHA 0405691Gold OreSurfaceAbandonedStatus date: 07/19/2006Bowstring OperationReported operatorRick SchipperReported controllerProduction / employmentView source coverage →
Bradley PlantMonterey, CANear BradleyMSHA 0405572Construction Sand and GravelSurfaceAbandonedStatus date: 04/01/2016Calportland ConstructionReported operatorTaiheiyo Cement CorpReported controllerProduction / employmentSafety recordsView source coverage →
BRADLEY PLANT & BORROW PITMonterey, CANear montereyMSHA 0405184Construction Sand and GravelSurfaceAbandonedStatus date: 05/19/1999Madonna Construction CompanyReported operatorMadonna AlexReported controllerNeither history importedView source coverage →
BRANDEN SAND PITShasta, CANear Hat CreekMSHA 0405477Construction Sand and GravelSurfaceAbandonedStatus date: 03/27/2003Hat Creek Construction IncReported operatorPerry ThompsonReported controllerProduction / employmentSafety recordsView source coverage →
Brems PitSanta Clara, CAMSHA 0401708Construction Sand and GravelSurfaceAbandonedStatus date: 01/01/1979Brems Sand & GravelReported operatorBrems Sand & GravelReported controllerNeither history importedView source coverage →
BriggsInyo, CAMSHA 0404860Gold OreSurfaceAbandonedStatus date: 06/12/1991Cr BriggsReported operatorAtna Resources Ltd.Reported controllerNeither history importedView source coverage →
Briggs MineInyo, CANear TronaMSHA 0405276Gold OreSurfaceAbandonedStatus date: 10/15/2019DV Natural Resources, LLCReported operatorAna M ClarkeReported controllerProduction / employmentSafety recordsView source coverage →
Briggs Road PlantVentura, CAMSHA 0404823Construction Sand and GravelSurfaceAbandonedStatus date: 02/13/1995Southern Pacific Milling CompanyReported operatorHanson PLCReported controllerNeither history importedView source coverage →
Briney MineMono, CAMSHA 0404886Gold OreUndergroundAbandonedStatus date: 06/22/1988Briney FoundationReported operatorBriney Guy AReported controllerNeither history importedView source coverage →
BrisbaneSan Mateo, CAMSHA 0405213Construction Sand and GravelSurfaceAbandonedStatus date: 08/22/1995Kiewit Pacific Co.Reported operatorKiewit Infrastructure Group IncReported controllerNeither history importedView source coverage →
Brisbane PlantSan Mateo, CANear South San FranciscoMSHA 0405541Construction Sand and GravelSurfaceAbandonedStatus date: 12/02/2002Brisbane Recycling Co., Inc.Reported operatorJoseph B NublaReported controllerProduction / employmentView source coverage →
Bristol Dry LakeSan Bernardino, CAMSHA 0401052Salt, Brine EvaporatedSurfaceAbandonedStatus date: 05/21/1982National Chloride Company Of AmericaReported operatorNational Chloride Company Of AmericaReported controllerNeither history importedView source coverage →
Britten Granite PitTulare, CAMSHA 0405166Crushed, Broken GraniteSurfaceAbandonedStatus date: 11/15/1993L E Britten ConstructionReported operatorBritten Lawrence EReported controllerNeither history importedView source coverage →
Brown Bear MineTrinity, CAMSHA 0403206Gold OreUndergroundAbandonedStatus date: 07/25/1983Shasta Bird Mine AssociatesReported operatorShasta Mine Associates-Bird DrillingReported controllerNeither history importedView source coverage →
BROWN CLAYImperial, CAMSHA 0405400Clay, Ceramic, Refractory Mnls.SurfaceAbandonedStatus date: 03/07/2001Protech Minerals IncReported operatorChul L ChoeReported controllerProduction / employmentSafety recordsView source coverage →
BrownsSiskiyou, CANear YrekaMSHA 0405797Crushed, Broken Stone NECSurfaceAbandonedStatus date: 03/12/2025L.P. EnterprisesReported operatorMichael T Peters; Eric W PetersReported controllerProduction / employmentSafety recordsView source coverage →
BROWN SAND INCSan Joaquin, CAMSHA 0404284Construction Sand and GravelSurfaceAbandonedStatus date: 05/19/1998Brown Sand IncReported operatorRobert H Brown JrReported controllerNeither history importedView source coverage →
BROWN SAND PLANT #4San Joaquin, CAMSHA 0404985Construction Sand and GravelFacilityAbandonedStatus date: 01/02/1998Brown Sand IncReported operatorRobert H Brown JrReported controllerNeither history importedView source coverage →
Brownstone QuarryColusa, CANear maxwellMSHA 0405453Dimension SandstoneSurfaceAbandonedStatus date: 12/20/2007Brownstone Quarry Reported operatorCharles J CoffynReported controllerProduction / employmentSafety recordsView source coverage →

Take the research further

Acquisition & reuse

Use the mine name and reported location to investigate county parcel and title records, mineral rights, access and planning constraints. MSHA mailing addresses are addresses of record and may not locate the mine. Confirm the parcel and current ownership separately.

EPA mine-site redevelopment primer ↗

Reclamation projects

Check official reclamation inventories and state or tribal programmes for documented hazards, project status and programme criteria. A matching name or an MSHA abandoned status alone does not confirm a programme match.

OSMRE abandoned mine land programme ↗

Source: MSHA public datasets. Production history checks quarterly and annual mine production/employment records. Safety history checks violations, inspections and accident reports; other source coverage is available on each mine profile.