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

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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
Richlue MineEl Dorado, CAMSHA 0404697Gold OreUndergroundAbandonedStatus date: 10/23/1984Teddy Bear Mining CompanyReported operatorGillespie Thomas AReported controllerNeither history importedView source coverage →
RICHMARK CANYON TALC INC.Inyo, CAMSHA 0405327TalcSurfaceAbandonedStatus date: 03/15/1999Richmark Canyon Talc IncReported operatorRichmark Resources LtdReported controllerNeither history importedView source coverage →
Richmond Mill/StocktonContra Costa, CAMSHA 0402315LimeFacilityAbandonedStatus date: 07/17/1990Chemstar Lime CompanyReported operatorLhoist GroupReported controllerNeither history importedView source coverage →
Richmond PlantContra Costa, CAMSHA 0400919GypsumFacilityAbandonedStatus date: 05/21/1982National Gypsum CompanyReported operatorLafarge S AReported controllerNeither history importedView source coverage →
RICHMOND QUARRYContra Costa, CAMSHA 0400228Crushed, Broken Stone NECSurfaceAbandonedStatus date: 03/12/1998Dutra MaterialsReported operatorBill T DutraReported controllerNeither history importedView source coverage →
Rich Ranch ReclamationShasta, CANear PlymouthMSHA 0405599Construction Sand and GravelSurfaceAbandonedStatus date: 10/22/2007North Fork AggregateReported operatorRobin RichReported controllerProduction / employmentSafety recordsView source coverage →
Rich & Whillock IncorporatedSan Diego, CAMSHA 0404631Crushed, Broken GraniteSurfaceAbandonedStatus date: 08/07/1984Rich & Whillock IncReported operatorRich & Whillock IncReported controllerNeither history importedView source coverage →
Right Star Calcite MineSan Bernardino, CANear Lucerne ValleyMSHA 0405133Chem. and Fertil. Mnls. NECSurfaceAbandonedStatus date: 08/27/2007Right Star CalciteReported operatorDonald L FifeReported controllerProduction / employmentSafety recordsView source coverage →
Rio Tinto MineKern, CANear BoronMSHA 0405925Construction Sand and GravelSurfaceAbandonedStatus date: 06/21/2019KiewitReported operatorKiewit Infrastructure Group IncReported controllerProduction / employmentSafety recordsView source coverage →
Ripley QuarryRiverside, CAMSHA 0404797Crushed, Broken Stone NECSurfaceAbandonedStatus date: 08/01/1988Fairfax & Rogers ConstructionReported operatorFairfax John & L W RogersReported controllerNeither history importedView source coverage →
RIVER PLANTKern, CANear BakersfieldMSHA 0405085Construction Sand and GravelSurfaceAbandonedStatus date: 01/15/2019Kern Brothers Trucking IncReported operatorJerry T KernReported controllerProduction / employmentSafety recordsView source coverage →
River Road Sand JobRiverside, CANear CoronaMSHA 0405505Construction Sand and GravelSurfaceAbandonedStatus date: 11/28/2008KEC EngineeringReported operatorJim ElfringReported controllerProduction / employmentSafety recordsView source coverage →
River Rock PlantFresno, CANear FresnoMSHA 0401711Construction Sand and GravelSurfaceAbandonedStatus date: 07/01/2021CalMat CoReported operatorVulcan Materials CompanyReported controllerProduction / employmentSafety recordsView source coverage →
River Rock Sand And GravelYuba, CAMSHA 0404305Construction Sand and GravelSurfaceAbandonedStatus date: 08/09/1982River Rock Construction IncReported operatorRiver Rock Construction IncReported controllerNeither history importedView source coverage →
River Sand & GravelSan Luis Obispo, CAMSHA 0404924Construction Sand and GravelSurfaceAbandonedStatus date: 09/23/1991River Sand & Gravel IncReported operatorRiver Sand & Gravel IncReported controllerNeither history importedView source coverage →
RiversideRiverside, CANear RiversideMSHA 0405735Sand, Industrial NECSurfaceAbandonedStatus date: 04/07/2016A-1 GritReported operatorHarold NewmanReported controllerProduction / employmentSafety recordsView source coverage →
R J MILES CO-SECRET TOWN PLANTNevada, CAMSHA 0404262Construction Sand and GravelSurfaceAbandonedStatus date: 08/28/2000R J Miles CompanyReported operatorScott MilesReported controllerProduction / employmentSafety recordsView source coverage →
R.J.Noble Co.Riverside, CANear CoronaMSHA 0405658Construction Sand and GravelSurfaceAbandonedStatus date: 09/10/2019R.J.Noble Co.Reported operatorMichael CarverReported controllerProduction / employmentSafety recordsView source coverage →
RMQ Plant 1San Bernardino, CANear FallbrookMSHA 0405902Construction Sand and GravelSurfaceAbandonedStatus date: 01/01/2017Edison Construction Inc.Reported operatorCathy RameyReported controllerProduction / employmentSafety recordsView source coverage →
Road Builders PitSanta Clara, CAMSHA 0404111Crushed, Broken Stone NECSurfaceAbandonedStatus date: 03/01/1978Thomas R BessReported operatorThomas R BessReported controllerNeither history importedView source coverage →
Roadrunner 32San Bernardino, CANear HighlandMSHA 0405632Construction Sand and GravelSurfaceAbandonedStatus date: 10/30/2018North County Sand & Gravel IncReported operatorMike J LaPagliaReported controllerProduction / employmentSafety recordsView source coverage →
Roads End MineSierra, CAMSHA 0404713Gold OreSurfaceAbandonedStatus date: 04/16/1985Geo Placers IncReported operatorSchmittel RichardReported controllerNeither history importedView source coverage →
ROBBERS ROOSTKern, CANear kernMSHA 0404676Gold OreSurfaceAbandonedStatus date: 01/27/1997Oro LimitedReported operatorHammond Glen RReported controllerSafety recordsView source coverage →
Robertson Sand & GravelSacramento, CAMSHA 0401928Construction Sand and GravelSurfaceAbandonedStatus date: 08/27/1980Robertson Sand & GravelReported operatorRobertson Sand & GravelReported controllerNeither history importedView source coverage →
Robertsons Lucern ValleySan Bernardino, CANear LUCERN VALLEYMSHA 0405640Construction Sand and GravelSurfaceAbandonedStatus date: 10/01/2006SLSN INCReported operatorSteve BubaloReported controllerProduction / employmentSafety recordsView source coverage →
Robertson's Portable Powerscreen PlantSan Bernardino, CANear Redlands Cemex 8203 Orange StMSHA 0405662Construction Sand and GravelSurfaceAbandonedStatus date: 12/06/2007Robertson's Ready-MixReported operatorRRM Development Corporation; Mitsubishi CorpReported controllerProduction / employmentSafety recordsView source coverage →
Robison Acosta & Blanton Port. Rock CrusCalaveras, CANear VernalisMSHA 0405231Construction Sand and GravelSurfaceAbandonedStatus date: 07/21/2003Robison Acosta Blanton Portable Rock CrushingReported operatorRobert RobisonReported controllerProduction / employmentSafety recordsView source coverage →
Robuck/Schmidt QuarryVentura, CAMSHA 0404332Construction Sand and GravelSurfaceAbandonedStatus date: 09/15/1994Robuck Construction IncReported operatorHartnett Robin & Charles W Poss IiiReported controllerNeither history importedView source coverage →
Rocklite Pit & MillVentura, CAMSHA 0400553Common Clays NECSurfaceAbandonedStatus date: 10/23/1985Lightweight Processing CompanyReported operatorJoseph BairdReported controllerNeither history importedView source coverage →
Rock-O Travertine QuarryPlumas, CAMSHA 0404125Crushed, Broken MarbleSurfaceAbandonedStatus date: 04/07/1981Rock-OReported operatorRock-OReported controllerNeither history importedView 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.