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 |
|---|---|---|---|---|
| Mendota MineClear Creek, COMSHA 0503506 | Silver OreUnderground | AbandonedStatus date: 10/26/1980 | Argosy Mining CompanyReported operatorKeith Henry J JrReported controller | Neither history importedView source coverage → |
| Merrill PitPark, CONear FairplayMSHA 0504402 | Construction Sand and GravelSurface | AbandonedStatus date: 02/18/2026 | Heartland Aggregate MiningReported operatorMexted Enterprises Inc; RGV LLC; Heartland Environmental Services LLCReported controller | Production / employmentSafety recordsView source coverage → |
| Merrill PitPark, CONear JeffersonMSHA 0504597 | Construction Sand and GravelSurface | AbandonedStatus date: 09/30/2022 | Park County Road & BridgeReported operatorPark County-COReported controller | Production / employmentSafety recordsView source coverage → |
| Mertens Pit IvLogan, COMSHA 0504355 | Construction Sand and GravelSurface | AbandonedStatus date: 06/17/1993 | Sterling Ready Mix Concrete CompanyReported operatorRobert C Mc AteeReported controller | Neither history importedView source coverage → |
| Mesa County Primary CrusherMesa, COMSHA 0503136 | Construction Sand and GravelSurface | AbandonedStatus date: 06/15/1992 | Mesa CountyReported operatorMesa County-CoReported controller | Neither history importedView source coverage → |
| Mesa No 5 Cg-27Mesa, COMSHA 0501117 | Uranium OreUnderground | AbandonedStatus date: 08/26/1982 | Ralph Foster & SonsReported operatorFoster RalphReported controller | Neither history importedView source coverage → |
| Mesa Rock CompanyMesa, COMSHA 0503945 | Crushed, Broken GraniteSurface | AbandonedStatus date: 09/11/1992 | Mesa Rock CompanyReported operatorMesa Rock CompanyReported controller | Neither history importedView source coverage → |
| MESITA HILLAlamosa, CONear PortableMSHA 0500433 | Crushed, Broken Stone NECSurface | AbandonedStatus date: 02/27/2003 | Mwca IncReported operatorHecla Mining CompanyReported controller | Production / employmentSafety recordsView source coverage → |
| METSO1213S El Paso, CONear Colorado SpringsMSHA 0505160 | Construction Sand and GravelSurface | AbandonedStatus date: 05/02/2024 | Castle Rock Construction Company of Colorado LLCReported operatorAmy Brooks; Ralph BellReported controller | Production / employmentSafety recordsView source coverage → |
| Metso 1213S Crusher CSH-7Grand, CONear GranbyMSHA 0504943 | Construction Sand and GravelSurface | AbandonedStatus date: 07/28/2011 | Overlook Mine, LLCReported operatorKenneth J EvansReported controller | Production / employmentSafety recordsView source coverage → |
| Metso 2.4 North Weld ScreenWeld, CONear NunnMSHA 0505094 | Construction Sand and GravelSurface | AbandonedStatus date: 10/06/2018 | Crossfire Aggregate Services LLCReported operatorEzra Eldon LeeReported controller | Production / employmentView source coverage → |
| Metso LT106 Track Mounted Jaw CrusherRoutt, CONear ToponasMSHA 0504872 | Construction Sand and GravelSurface | AbandonedStatus date: 05/26/2021 | Peak MaterialsReported operatorSummit Materials LLCReported controller | Production / employmentSafety recordsView source coverage → |
| Metso LT120 Jaw Crusher CSH-11Grand, CONear GranbyMSHA 0504945 | Construction Sand and GravelSurface | AbandonedStatus date: 02/01/2022 | Overlook Mine, LLCReported operatorKenneth J EvansReported controller | Production / employmentSafety recordsView source coverage → |
| Metso ST4-8Pueblo, CONear Pueblo WestMSHA 0504969 | Construction Sand and GravelSurface | AbandonedStatus date: 02/12/2019 | Rocky Mountain Landscape Materials, LLCReported operatorDanny Tezak; Rhonda LewisReported controller | Production / employmentSafety recordsView source coverage → |
| M H S LabJefferson, COMSHA 0504391 | Gold OreFacility | AbandonedStatus date: 03/13/1990 | Golbal MillingReported operatorGolbal MillingReported controller | Neither history importedView source coverage → |
| Mica LodeFremont, COMSHA 0500052 | Crushed, Broken SandstoneSurface | AbandonedStatus date: 12/08/1978 | Colonna Of Colorado CompanyReported operatorBill MurphreeReported controller | Neither history importedView source coverage → |
| Mickey BreenOuray, COMSHA 0502982 | Gold OreUnderground | AbandonedStatus date: 01/04/1980 | Don Nordlander Mining CompanyReported operatorNordlander Donald BReported controller | Neither history importedView source coverage → |
| Mid-Continent Limestone QuarryGarfield, CONear Glenwood SpringsMSHA 0500004 | Crushed, Broken Limestone NECSurface | AbandonedStatus date: 10/01/2005 | Pitkin Iron CorpReported operatorMid-Continent Resources IncReported controller | Neither history importedView source coverage → |
| Middle CreekRoutt, CONear Steamboat SpringsMSHA 0503177 | Coal (Bituminous)Surface | AbandonedStatus date: 10/01/1979 | Energy Fuels CorpReported operatorEnergy Fuels Coal Resources LtdReported controller | Neither history importedView source coverage → |
| Midget MineTeller, COMSHA 0503687 | Gold OreUnderground | AbandonedStatus date: 07/23/1984 | Midget-Moon Anchor Mining CompanyReported operatorMidget-Moon Anchor Mining CompanyReported controller | Neither history importedView source coverage → |
| Midland MineGunnison, COMSHA 0503564 | Gold OreUnderground | AbandonedStatus date: 09/09/1982 | Martin Trost AssociatesReported operatorTrost Paul B & William F MartinReported controller | Neither history importedView source coverage → |
| Midnight MineRio Blanco, COMSHA 0501754 | Uranium OreUnderground | AbandonedStatus date: 05/20/1982 | Midnight Mining CompanyReported operatorMidnight Mining CompanyReported controller | Neither history importedView source coverage → |
| Midway Gravel QuarryEl Paso, COMSHA 0503942 | Construction Sand and GravelSurface | AbandonedStatus date: 10/31/1996 | Midway Sand & Gravel IncReported operatorVernie HoutchensReported controller | Neither history importedView source coverage → |
| Mike Christian Pit 2El Paso, COMSHA 0503204 | Construction Sand and GravelSurface | AbandonedStatus date: 04/01/1985 | Schmidt-Tiago Construction CompanyReported operatorRogers Construction IncReported controller | Neither history importedView source coverage → |
| MillerWeld, COMSHA 0503391 | Construction Sand and GravelSurface | AbandonedStatus date: 08/27/1979 | Colorado Department Of HighwaysReported operatorState Of ColoradoReported controller | Neither history importedView source coverage → |
| MILLER PITElbert, CONear ElizabethMSHA 0504098 | Construction Sand and GravelSurface | AbandonedStatus date: 04/12/2019 | Schmidt AggregatesReported operatorEdward C Levy JrReported controller | Production / employmentSafety recordsView source coverage → |
| Miller'S CrusherArchuleta, COMSHA 0504348 | Construction Sand and GravelSurface | AbandonedStatus date: 09/30/1988 | Utility CompletionsReported operatorUtility CompletionsReported controller | Neither history importedView source coverage → |
| Mill Iron PitWeld, CONear GreeleyMSHA 0505172 | Construction Sand and GravelSurface | AbandonedStatus date: 02/20/2025 | WW Clyde & Co.Reported operatorCCI (Clyde Companies Inc)Reported controller | Production / employmentSafety recordsView source coverage → |
| Mincic PitLas Animas, COMSHA 0504009 | Construction Sand and GravelSurface | AbandonedStatus date: 08/06/1985 | Aaa Roofing CompanyReported operatorDaniel G HuskinReported controller | Neither history importedView source coverage → |
| Mine 1 & 2Routt, CONear Oak CreekMSHA 0500302 | Coal (Bituminous)Surface | AbandonedStatus date: 12/06/1991 | Colorado Yampa Coal CompanyReported operatorCyprus Amax Minerals CompanyReported 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.