HISTORICAL SITES / RESEARCH DIRECTORY
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.
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 location | Material / type | Reported status | Reported relationships | Available history |
|---|---|---|---|---|
| MawMesa, COMSHA 0502950 | Uranium OreSurface | AbandonedStatus date: 05/01/1979 | Four Corners Mining & MineralsReported operatorFour Corners Mining & MineralsReported controller | Neither history importedView source coverage → |
| MaybeMontrose, COMSHA 0501657 | Uranium OreUnderground | AbandonedStatus date: 03/26/1979 | Union Carbide CorpReported operatorUnion Carbide CorpReported controller | Neither history importedView source coverage → |
| MaybellMoffat, COMSHA 0502955 | Crushed, Broken TraprockSurface | AbandonedStatus date: 05/12/1994 | Umetco Minerals CorpReported operatorUnion Carbide CorpReported controller | Neither history importedView source coverage → |
| Maybell Enterprises IncMoffat, CONear MAYBELLMSHA 0504434 | Crushed, Broken Limestone NECSurface | AbandonedStatus date: 08/13/2013 | Maybell Enterprises IncReported operatorDarryl L Steele; Bret L SteeleReported controller | Production / employmentSafety recordsView source coverage → |
| Maybell PitMoffat, COMSHA 0502719 | Uranium OreSurface | AbandonedStatus date: 09/27/1984 | Steele ConstructionReported operatorSteele DonReported controller | Neither history importedView source coverage → |
| Mayday - Idaho MineLa Plata, CONear HesperusMSHA 0503674 | Gold OreUnderground | AbandonedStatus date: 03/11/2017 | Sunrise Mining, LLCReported operatorJohn Nielsen; Sara GlinatsisReported controller | Production / employmentSafety recordsView source coverage → |
| Mayflower MillSan Juan, COMSHA 0503841 | Gold OreFacility | AbandonedStatus date: 06/02/1986 | Sunnyside Gold CorpReported operatorEcho Bay Mines LtdReported controller | Neither history importedView source coverage → |
| Mayflower PitSummit, COMSHA 0502723 | Construction Sand and GravelSurface | AbandonedStatus date: 01/19/1979 | Plains Aggregate CompanyReported operatorPlains Aggregate CompanyReported controller | Neither history importedView source coverage → |
| Mayhew PitEl Paso, COMSHA 0503120 | Construction Sand and GravelSurface | AbandonedStatus date: 07/23/1979 | El Paso County Dept Of TransportationReported operatorEl Paso County-CoReported controller | Neither history importedView source coverage → |
| McCabe PitGunnison, CONear GunnisonMSHA 0505096 | Construction Sand and GravelSurface | AbandonedStatus date: 10/01/2025 | Rocky Mountain Aggregate & Construction LLCReported operatorErin Luttrell; C Zane LuttrellReported controller | Production / employmentSafety recordsView source coverage → |
| Mccann Clay MineBoulder, COMSHA 0501435 | Fire ClaySurface | AbandonedStatus date: 06/17/1986 | Wesley D Conda IncReported operatorNicholas G CondaReported controller | Neither history importedView source coverage → |
| MC CLAIN PITDouglas, CONear FranktownMSHA 0504619 | Construction Sand and GravelSurface | AbandonedStatus date: 06/14/2006 | Schmidt AggregatesReported operatorEdward C Levy JrReported controller | Production / employmentSafety recordsView source coverage → |
| Mc Clane Canyon MineGarfield, CONear LomaMSHA 0503013 | Coal (Bituminous)Underground | Abandoned and SealedStatus date: 08/24/2015 | McClane Canyon Mining, LLCReported operatorRhino Resource Partners LPReported controller | Production / employmentSafety recordsView source coverage → |
| Mc Clelland TunnelClear Creek, COMSHA 0503640 | Gold OreUnderground | AbandonedStatus date: 01/25/1982 | Equity Gold IncReported operatorTatum JimReported controller | Neither history importedView source coverage → |
| McCloskey portable screen plantSummit, CONear SilverthroneMSHA 0504970 | Construction Sand and GravelSurface | AbandonedStatus date: 02/02/2013 | Everist Materials LLCReported operatorTom EveristReported controller | Production / employmentSafety recordsView source coverage → |
| Mcginley No 2Mesa, COMSHA 0502819 | Coal (Bituminous)Underground | AbandonedStatus date: 09/30/1976 | Mc Ginley Coal & EnergyReported operatorMc Ginley Coal & EnergyReported controller | Neither history importedView source coverage → |
| Mc Intyre PitJefferson, COMSHA 0501031 | Construction Sand and GravelSurface | AbandonedStatus date: 08/20/1985 | Mobile Premix Concrete IncReported operatorM P M IncReported controller | Neither history importedView source coverage → |
| MCINTYRE PITJefferson, CONear DenverMSHA 0500932 | Construction Sand and GravelSurface | AbandonedStatus date: 04/02/2004 | Asphalt Paving CompanyReported operatorJeffrey W Keller; John M KellerReported controller | Neither history importedView source coverage → |
| MclairDouglas, COMSHA 0503314 | Construction Sand and GravelSurface | AbandonedStatus date: 08/27/1979 | Colorado Department Of HighwaysReported operatorState Of ColoradoReported controller | Neither history importedView source coverage → |
| Mclaughlin-Banber StringerPueblo, COMSHA 0503348 | Construction Sand and GravelSurface | AbandonedStatus date: 10/09/1979 | Colorado Department Of HighwaysReported operatorState Of ColoradoReported controller | Neither history importedView source coverage → |
| Mc Nulty CinderEagle, COMSHA 0503520 | Construction Sand and GravelSurface | AbandonedStatus date: 08/13/1982 | Colorado Department Of HighwaysReported operatorState Of ColoradoReported controller | Neither history importedView source coverage → |
| McNulty Cinder PitEagle, CONear CarbondaleMSHA 0504941 | Construction Sand and GravelSurface | AbandonedStatus date: 05/20/2013 | Zen Excavation, IncReported operatorJustin HelmerReported controller | Production / employmentSafety recordsView source coverage → |
| Mc Nulty PitEagle, COMSHA 0504309 | PumiceSurface | AbandonedStatus date: 08/02/1989 | Mc Nulty Pumice ProductsReported operatorMc Nulty Pumice ProductsReported controller | Neither history importedView source coverage → |
| Mc Phee Reservoir PitDolores, COMSHA 0504093 | Construction Sand and GravelSurface | AbandonedStatus date: 05/11/1987 | U S Bureau Of ReclamationReported operatorUnited States GovernmentReported controller | Neither history importedView source coverage → |
| McveyBaca, COMSHA 0503327 | Construction Sand and GravelSurface | AbandonedStatus date: 10/09/1979 | Colorado Department Of HighwaysReported operatorState Of ColoradoReported controller | Neither history importedView source coverage → |
| Meadow HollowLarimer, CONear BerthoudMSHA 0504971 | Construction Sand and GravelSurface | AbandonedStatus date: 02/08/2018 | Molina Red StoneReported operatorHomero MolinaReported controller | Production / employmentSafety recordsView source coverage → |
| Meadow Hollow Quarry Larimer, CONear Carter LakeMSHA 0504935 | Dimension SandstoneSurface | AbandonedStatus date: 05/24/2014 | Carter Lake EnterprisesReported operatorMatthew SpragueReported controller | Production / employmentSafety recordsView source coverage → |
| Meadows #1Routt, CONear MilnerMSHA 0503039 | Coal (Bituminous)Surface | AbandonedStatus date: 03/09/1982 | Sun Coal Company IncReported operatorMassey Energy CompanyReported controller | Neither history importedView source coverage → |
| MeakinsLogan, COMSHA 0503377 | Construction Sand and GravelSurface | AbandonedStatus date: 10/16/1979 | Colorado Department Of HighwaysReported operatorState Of ColoradoReported controller | Neither history importedView source coverage → |
| MEEKER #870Gilpin, COMSHA 0504583 | Construction Sand and GravelSurface | AbandonedStatus date: 03/30/1998 | Sihoh/Meeker J VReported operatorRamsey RonaldReported controller | Neither history importedView source coverage → |
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 ↗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.