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 |
|---|---|---|---|---|
| Morse Sand And Gravel PitLa Plata, COMSHA 0501012 | Construction Sand and GravelSurface | AbandonedStatus date: 10/27/1983 | Morse Sand & GravelReported operatorMorse Sand & GravelReported controller | Neither history importedView source coverage → |
| Moss PitEl Paso, COMSHA 0503121 | 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 → |
| Mound MineChaffee, COMSHA 0502385 | Silver OreUnderground | AbandonedStatus date: 04/09/1980 | Big Basin Mining CorpReported operatorBig Basin Mining CorpReported controller | Neither history importedView source coverage → |
| Mountain Mobil PitGarfield, COMSHA 0503670 | Construction Sand and GravelSurface | AbandonedStatus date: 10/06/1981 | Empire Contracting CorpReported operatorMtn Mobile Mix IncReported controller | Neither history importedView source coverage → |
| Mountain Monarch MineOuray, COMSHA 0503074 | Lead-Zinc OreUnderground | AbandonedStatus date: 12/23/1981 | Don Nordlander Mining CompanyReported operatorNordlander Donald BReported controller | Neither history importedView source coverage → |
| Mountain Shadows Gravel PitEl Paso, COMSHA 0504174 | Construction Sand and GravelSurface | AbandonedStatus date: 03/28/1988 | R D Figgie Excavating IncReported operatorFiggie Richard DReported controller | Neither history importedView source coverage → |
| Mountain Top MineOuray, COMSHA 0503588 | Silver OreUnderground | AbandonedStatus date: 03/18/1981 | Silver Eagle Mining CompanyReported operatorNoble Mining Co-Edward GaylordReported controller | Neither history importedView source coverage → |
| Mountain Top MineOuray, COMSHA 0503602 | Gold OreUnderground | AbandonedStatus date: 04/23/1985 | Silver Eagle Mining CompanyReported operatorNoble Mining Co-Edward GaylordReported controller | Neither history importedView source coverage → |
| MOUNTAIN TOP MINEOuray, COMSHA 0504535 | Misc. Metal Ore NECUnderground | AbandonedStatus date: 01/27/1997 | M G M-Maple Grove Mill/MineReported operatorPonderosa TrustReported controller | Neither history importedView source coverage → |
| Mount Emmons ProjectGunnison, CONear GunnisonMSHA 0500409 | Molybdenum OreUnderground | AbandonedStatus date: 01/29/2014 | U.S. Energy Corp.Reported operatorU S Energy CorpReported controller | Production / employmentSafety recordsView source coverage → |
| M P M Fort Collins Timberline PitLarimer, COMSHA 0503541 | Construction Sand and GravelSurface | AbandonedStatus date: 07/07/1988 | Sterling Sand & Gravel CompanyReported operatorRedland PlcReported controller | Neither history importedView source coverage → |
| M P M Greeley 35th AvenueWeld, COMSHA 0500926 | Construction Sand and GravelSurface | AbandonedStatus date: 03/09/1989 | Sterling Sand & Gravel CompanyReported operatorRedland PlcReported controller | Neither history importedView source coverage → |
| MPRC PitPueblo, CONear PuebloMSHA 0504839 | Construction Sand and GravelSurface | AbandonedStatus date: 10/31/2006 | Tug Hill Construction, Inc.Reported operatorJeff KelloggReported controller | Production / employmentSafety recordsView source coverage → |
| Mt EmmonsGunnison, COMSHA 0503142 | Molybdenum OreUnderground | AbandonedStatus date: 01/09/1979 | Climax Molybdenum CompanyReported operatorCyprus Amax Minerals CompanyReported controller | Neither history importedView source coverage → |
| Mt Harris Coal CompanyRoutt, CONear HaydenMSHA 0503217 | Coal (Bituminous)Facility | AbandonedStatus date: 09/05/1985 | Mt Harris Coal CompanyReported operatorAnderson DuaneReported controller | Neither history importedView source coverage → |
| MTNS-Portable Plant #5Garfield, CONear Fort CollinsMSHA 0504474 | Dimension Stone NECSurface | AbandonedStatus date: 10/15/2004 | Lafarge West IncorporatedReported operatorHolcim LtdReported controller | Production / employmentSafety recordsView source coverage → |
| Mt Olivet DevelopmentJefferson, COMSHA 0504206 | Construction Sand and GravelSurface | AbandonedStatus date: 03/19/1990 | L G Everist IncReported operatorL G Everist IncReported controller | Neither history importedView source coverage → |
| Mt Shadow PitPueblo, COMSHA 0503523 | Construction Sand and GravelSurface | AbandonedStatus date: 04/10/1980 | Southway Const Co Inc & Asphalt Gravel Prod IncReported operatorEstate of Henry T. Southway Jr.Reported controller | Neither history importedView source coverage → |
| MULE CREEK GRAVEL PITTeller, CONear DivideMSHA 0504711 | Construction Sand and GravelSurface | AbandonedStatus date: 07/08/2016 | Mule Creek Gravel PitReported operatorPete KuyperReported controller | Production / employmentSafety recordsView source coverage → |
| Mum MineMontrose, COMSHA 0502588 | Uranium OreUnderground | AbandonedStatus date: 12/04/1979 | Pioneer Uravan IncReported operatorPioneer CorpReported controller | Neither history importedView source coverage → |
| Munger Canyon MineGarfield, CONear LomaMSHA 0503119 | Coal (Bituminous)Underground | Abandoned and SealedStatus date: 06/09/1992 | Lodestar Energy IncReported operatorIracoal IncorporatedReported controller | Neither history importedView source coverage → |
| MUNROE QUARRYLarimer, COMSHA 0503114 | GypsumSurface | AbandonedStatus date: 05/12/1997 | Colorado Lien CompanyReported operatorPete Lien & Sons IncReported controller | Neither history importedView source coverage → |
| Murco MillFremont, COMSHA 0504148 | GypsumFacility | AbandonedStatus date: 12/14/1987 | Murco Wall ProductsReported operatorMurco Wall ProductsReported controller | Neither history importedView source coverage → |
| MuriettaMontrose, COMSHA 0502946 | Uranium-Vanadium OreUnderground | AbandonedStatus date: 01/23/1985 | Urralburu Mining CompanyReported operatorUrralburu BenReported controller | Neither history importedView source coverage → |
| MurphyKit Carson, COMSHA 0503320 | Construction Sand and GravelSurface | AbandonedStatus date: 08/27/1979 | Colorado Department Of HighwaysReported operatorState Of ColoradoReported controller | Neither history importedView source coverage → |
| Murphy PitRoutt, COMSHA 0502644 | Construction Sand and GravelSurface | AbandonedStatus date: 06/25/1981 | Schmidt-Tiago Construction CompanyReported operatorRogers Construction IncReported controller | Neither history importedView source coverage → |
| Murphy PitGrand, COMSHA 0503628 | Construction Sand and GravelSurface | AbandonedStatus date: 09/17/1987 | Clayton Construction CompanyReported operatorClayton G CliffordReported controller | Neither history importedView source coverage → |
| M. Vasquez QuarryBoulder, CONear LyonsMSHA 0504729 | Dimension SandstoneSurface | AbandonedStatus date: 10/01/2010 | O & A Stone CompanyReported operatorArthur VasquezReported controller | Production / employmentSafety recordsView source coverage → |
| MW Sorter LLC (London Mine)Park, CONear AlmaMSHA 0505178 | Gold OreFacility | AbandonedStatus date: 07/28/2026 | MW Sorter LLCReported operatorJoseph HarringtonReported controller | Production / employmentSafety recordsView source coverage → |
| Myers PitAlamosa, COMSHA 0503872 | Construction Sand and GravelSurface | AbandonedStatus date: 05/06/1985 | J & J Gravel Company IncReported operatorMyers JerroldReported 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.