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 |
|---|---|---|---|---|
| Nu Gap No 3 MineGarfield, COMSHA 0500441 | Coal (Bituminous)Underground | AbandonedStatus date: 09/30/1976 | Henry Bendetti Coal CompanyReported operatorBendetti HenryReported controller | Neither history importedView source coverage → |
| Nu-Gap (Ug)Garfield, COMSHA 0500352 | Coal (Bituminous)Underground | AbandonedStatus date: 08/29/1974 | Bendetti Bros Coal CoReported operatorBendetti Bros Coal CoReported controller | Neither history importedView source coverage → |
| NystromMesa, COMSHA 0503900 | Construction Sand and GravelSurface | AbandonedStatus date: 05/30/1985 | Corn Construction CompanyReported operatorLarry W CornReported controller | Neither history importedView source coverage → |
| Oaklands Ranch PitDouglas, CONear SedaliaMSHA 0505078 | Construction Sand and GravelSurface | AbandonedStatus date: 11/02/2023 | Oaklands RanchReported operatorDavid Kenneth Curtis; David Alastair CurtisReported controller | Production / employmentSafety recordsView source coverage → |
| Occhiato-GersickPueblo, COMSHA 0503349 | Construction Sand and GravelSurface | AbandonedStatus date: 10/09/1979 | Colorado Department Of HighwaysReported operatorState Of ColoradoReported controller | Neither history importedView source coverage → |
| O C Coal MineGunnison, CONear GunnisonMSHA 0500259 | Coal (Bituminous)Underground | Abandoned and SealedStatus date: 06/12/1992 | O C Coal MineReported operatorWeaver RobertReported controller | Neither history importedView source coverage → |
| OctoberMesa, COMSHA 0500918 | Uranium-Vanadium OreUnderground | AbandonedStatus date: 03/23/1984 | Rajah Ventures LtdReported operatorSwerdfeger R MReported controller | Neither history importedView source coverage → |
| Ohline QuarriesLarimer, COMSHA 0504192 | Dimension SandstoneSurface | AbandonedStatus date: 07/05/1990 | Doc'S Stone CompanyReported operatorGerner RobertReported controller | Neither history importedView source coverage → |
| Ohline Quarry Pablo Vasquez LeaseLarimer, COMSHA 0500861 | Dimension SandstoneSurface | AbandonedStatus date: 06/17/1981 | Pablo VasquezReported operatorPablo VasquezReported controller | Neither history importedView source coverage → |
| Old Hundred MineSan Juan, COMSHA 0503736 | Lead-Zinc OreUnderground | AbandonedStatus date: 06/02/1982 | Asamera Minerals (Us) IncReported operatorAsamera Resources IncReported controller | Neither history importedView source coverage → |
| Old River MillMontrose, COMSHA 0501589 | Construction Sand and GravelSurface | AbandonedStatus date: 08/18/1992 | Western Earth MoversReported operatorWatson Tom & Mike GuffeyReported controller | Neither history importedView source coverage → |
| Old Settler Mine & MillClear Creek, COMSHA 0503716 | Silver OreUnderground | AbandonedStatus date: 12/30/1986 | Jupiter Gold Company Of ColoradoReported operatorLeavitt Hafen WReported controller | Neither history importedView source coverage → |
| Ophir 27San Miguel, COMSHA 0504088 | Gold OreUnderground | AbandonedStatus date: 11/07/1985 | Ex-Terra Corp IiReported operatorChurch Ray KReported controller | Neither history importedView source coverage → |
| Oro-FinoGilpin, COMSHA 0503604 | Gold OreUnderground | AbandonedStatus date: 11/18/1980 | Paul S CoupeyReported operatorPaul S CoupeyReported controller | Neither history importedView source coverage → |
| Oro Plata MillLa Plata, COMSHA 0503756 | Crushed, Broken SandstoneFacility | AbandonedStatus date: 04/15/1988 | Stewart Operation & ConstructionReported operatorStewart SteveReported controller | Neither history importedView source coverage → |
| Orphan Boy MinePark, COMSHA 0503751 | Gold OreSurface | AbandonedStatus date: 12/10/1984 | Orphan Boy LimitedReported operatorOrphan Boy LimitedReported controller | Neither history importedView source coverage → |
| OrtizGarfield, COMSHA 0503914 | Construction Sand and GravelSurface | AbandonedStatus date: 05/30/1985 | Corn Construction CompanyReported operatorLarry W CornReported controller | Neither history importedView source coverage → |
| Osborn PitLarimer, COMSHA 0503297 | Construction Sand and GravelSurface | AbandonedStatus date: 08/20/1982 | Loveland Excavating CompanyReported operatorRichard ConnellReported controller | Neither history importedView source coverage → |
| Osceola-Pride MineSan Juan, COMSHA 0503428 | Lead-Zinc OreUnderground | AbandonedStatus date: 10/26/1982 | P & G Mining IncReported operatorPeck Richard FReported controller | Neither history importedView source coverage → |
| Otero County CrusherOtero, CONear Rocky FordMSHA 0504139 | Construction Sand and GravelSurface | AbandonedStatus date: 09/15/2026 | Otero CountyReported operatorOtero County-COReported controller | Production / employmentSafety recordsView source coverage → |
| Ouray County Gravel PitOuray, COMSHA 0504036 | Construction Sand and GravelSurface | AbandonedStatus date: 09/23/1991 | County Of Ouray ColoradoReported operatorOuray County-COReported controller | Neither history importedView source coverage → |
| Ouray County Portable Screening PlantOuray, CONear RidgewayMSHA 0504806 | Construction Sand and GravelSurface | AbandonedStatus date: 12/16/2005 | Ouray CountyReported operatorOuray County-COReported controller | Production / employmentSafety recordsView source coverage → |
| Outwest Mine & MillMontezuma, COMSHA 0503721 | Gold OreUnderground | AbandonedStatus date: 10/12/1982 | Mancos Mining CompanyReported operatorMancos Mining CompanyReported controller | Neither history importedView source coverage → |
| Overlook Mine Grand, CONear GrantMSHA 0504890 | Construction Sand and GravelSurface | AbandonedStatus date: 08/01/2024 | Overlook Mine, LLCReported operatorKenneth J EvansReported controller | Production / employmentSafety recordsView source coverage → |
| Owen UptainMontrose, COMSHA 0504410 | Gold OreSurface | AbandonedStatus date: 08/22/1990 | Owen UptainReported operatorUptain OwenReported controller | Neither history importedView source coverage → |
| Owl Canyon Quarry (Section 16)Larimer, COMSHA 0503283 | Crushed, Broken Limestone NECSurface | AbandonedStatus date: 07/03/1985 | Divide Constructors IncReported operatorJerome J DohertyReported controller | Neither history importedView source coverage → |
| OWL Western Gravel & DisposalRio Blanco, CONear RangelyMSHA 0504929 | Construction Sand and GravelSurface | AbandonedStatus date: 10/16/2019 | Oilfield Water LogisticsReported operatorNevin BannisterReported controller | Production / employmentSafety recordsView source coverage → |
| Oyla MineSan Miguel, COMSHA 0503194 | Uranium OreUnderground | AbandonedStatus date: 04/11/1979 | Sage & Sage Mining CompanyReported operatorSage & Sage Mining CompanyReported controller | Neither history importedView source coverage → |
| P-11-6600 PORTABLE CONVEYORWeld, COMSHA 0503381 | Construction Sand and GravelSurface | AbandonedStatus date: 09/07/1999 | Colorado Department Of TransportationReported operatorState Of ColoradoReported controller | Production / employmentView source coverage → |
| P11-6600 Portable ConveyorKit Carson, COMSHA 0503318 | Construction Sand and GravelSurface | AbandonedStatus date: 08/27/1979 | Colorado Department Of HighwaysReported operatorState Of ColoradoReported 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.