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 |
|---|---|---|---|---|
| Nola Z C-Sr-16San Miguel, COMSHA 0503084 | Uranium OreUnderground | AbandonedStatus date: 01/04/1979 | Starks MiningReported operatorStarks R L & BobReported controller | Neither history importedView source coverage → |
| Nordberg AssemblyMontezuma, CONear DoloresMSHA 0504867 | Construction Sand and GravelSurface | AbandonedStatus date: 11/05/2015 | Skanska USA Civil West RMDReported operatorSkanska ABReported controller | Production / employmentSafety recordsView source coverage → |
| Northern Coal #1Rio Blanco, CONear MeekerMSHA 0503227 | Coal (Lignite)Underground | AbandonedStatus date: 11/01/1982 | Northern Coal CompanyReported operatorInternorth IncReported controller | Neither history importedView source coverage → |
| Northern Portable #1Garfield, CONear Glenwood SpringsMSHA 0504821 | Construction Sand and GravelSurface | AbandonedStatus date: 07/28/2005 | Lafarge West, Inc.Reported operatorHolcim LtdReported controller | Production / employmentView source coverage → |
| Northern Portable Plant #10Otero, CONear ManzanolaMSHA 0504531 | Construction Sand and GravelSurface | AbandonedStatus date: 01/01/2023 | Martin Marietta MaterialsReported operatorMartin Marietta Materials IncReported controller | Production / employmentSafety recordsView source coverage → |
| Northern Portable Plant #11Jefferson, CONear GoldenMSHA 0503984 | Construction Sand and GravelSurface | AbandonedStatus date: 03/04/2024 | Martin Marietta MaterialsReported operatorMartin Marietta Materials IncReported controller | Production / employmentSafety recordsView source coverage → |
| Northern Portable Plant #11Eagle, CONear GypsumMSHA 0504059 | Construction Sand and GravelSurface | AbandonedStatus date: 01/22/2016 | Martin Marietta MaterialsReported operatorMartin Marietta Materials IncReported controller | Production / employmentSafety recordsView source coverage → |
| Northern Portable Plant #12Larimer, CONear Fort CollinsMSHA 0504526 | Construction Sand and GravelSurface | AbandonedStatus date: 07/27/2026 | Martin Marietta MaterialsReported operatorMartin Marietta Materials IncReported controller | Production / employmentSafety recordsView source coverage → |
| Northern Portable Plant #13Larimer, CONear GoldenMSHA 0504556 | Construction Sand and GravelSurface | AbandonedStatus date: 05/08/2006 | Lafarge West IncorporatedReported operatorHolcim LtdReported controller | Production / employmentSafety recordsView source coverage → |
| NORTHERN PORTABLE PLANT #15Garfield, CONear SiltMSHA 0504647 | Construction Sand and GravelSurface | AbandonedStatus date: 10/01/2015 | Martin Marietta MaterialsReported operatorMartin Marietta Materials IncReported controller | Production / employmentSafety recordsView source coverage → |
| Northern Portable Plant #17Larimer, CONear Fort CollinsMSHA 0504735 | Construction Sand and GravelSurface | AbandonedStatus date: 10/16/2023 | Martin Marietta MaterialsReported operatorMartin Marietta Materials IncReported controller | Production / employmentSafety recordsView source coverage → |
| Northern Portable Plant #18Adams, CONear Fort CollinsMSHA 0501057 | Construction Sand and GravelSurface | AbandonedStatus date: 05/22/2008 | Lafarge West IncorporatedReported operatorHolcim LtdReported controller | Production / employmentSafety recordsView source coverage → |
| Northern Portable Plant #19Weld, CONear GreeleyMSHA 0504382 | Construction Sand and GravelSurface | AbandonedStatus date: 03/30/2020 | Martin Marietta MaterialsReported operatorMartin Marietta Materials IncReported controller | Production / employmentSafety recordsView source coverage → |
| NORTHERN PORTABLE PLANT #2Larimer, CONear DenverMSHA 0504360 | Construction Sand and GravelSurface | AbandonedStatus date: 09/29/2006 | Lafarge West IncorporatedReported operatorHolcim LtdReported controller | Production / employmentSafety recordsView source coverage → |
| NORTHERN PORTABLE PLANT #22Garfield, CONear GarfieldMSHA 0503802 | Construction Sand and GravelSurface | AbandonedStatus date: 11/19/2002 | Lafarge West IncorporatedReported operatorHolcim LtdReported controller | Production / employmentSafety recordsView source coverage → |
| NORTHERN PORTABLE PLANT #3Larimer, CONear Fort CollinsMSHA 0504361 | Construction Sand and GravelSurface | AbandonedStatus date: 12/01/2017 | Martin Marietta MaterialsReported operatorMartin Marietta Materials IncReported controller | Production / employmentSafety recordsView source coverage → |
| Northern Portable Plant #4Larimer, CONear DevnerMSHA 0504320 | Construction Sand and GravelSurface | AbandonedStatus date: 01/22/2016 | Martin Marietta MaterialsReported operatorMartin Marietta Materials IncReported controller | Production / employmentSafety recordsView source coverage → |
| NORTHERN PORTABLE PLANT #4Larimer, CONear Fort CollinsMSHA 4801565 | Construction Sand and GravelSurface | AbandonedStatus date: 10/02/2019 | Martin Marietta MaterialsReported operatorMartin Marietta Materials IncReported controller | Production / employmentSafety recordsView source coverage → |
| Northern Portable Plant #5Larimer, CONear Fort CollinsMSHA 0504330 | Construction Sand and GravelSurface | AbandonedStatus date: 09/29/2004 | Lafarge West IncorporatedReported operatorHolcim LtdReported controller | Production / employmentSafety recordsView source coverage → |
| NORTHERN PORTABLE PLANT #7Larimer, CONear DenverMSHA 0504364 | Construction Sand and GravelSurface | AbandonedStatus date: 08/18/2008 | Lafarge West IncorporatedReported operatorHolcim LtdReported controller | Production / employmentSafety recordsView source coverage → |
| NORTHERN PORTABLE PLANT #8Eagle, CONear WestminsterMSHA 0504365 | Construction Sand and GravelSurface | AbandonedStatus date: 03/24/2009 | Lafarge West IncorporatedReported operatorHolcim LtdReported controller | Production / employmentSafety recordsView source coverage → |
| Northern Portable Plant #9Larimer, CONear DenverMSHA 0504515 | Construction Sand and GravelSurface | AbandonedStatus date: 04/07/2004 | Lafarge West IncorporatedReported operatorHolcim LtdReported controller | Production / employmentSafety recordsView source coverage → |
| NorthfieldFremont, CONear FLORENCEMSHA 0504918 | Coal (Bituminous)Underground | AbandonedStatus date: 10/01/2015 | Northfield Partners LLCReported operatorRobert H Scott; Scott LeonhartReported controller | Neither history importedView source coverage → |
| North Fork Coal YardDelta, COMSHA 0502625 | Coal (Bituminous)Surface | AbandonedStatus date: 01/13/1977 | North Fork Coal YardReported operatorBarkoff Larry HReported controller | Neither history importedView source coverage → |
| North Fork Sand & GravelDelta, COMSHA 0501017 | Construction Sand and GravelSurface | AbandonedStatus date: 04/03/1989 | Coleman Sand & GravelReported operatorKelly ColemanReported controller | Neither history importedView source coverage → |
| North Star 1Las Animas, CONear TrinidadMSHA 0504187 | Coal (Bituminous)Surface | AbandonedStatus date: 06/14/1990 | North Star MiningReported operatorWiggins JohnReported controller | Neither history importedView source coverage → |
| North Star MinePark, COMSHA 0503784 | Gold OreUnderground | AbandonedStatus date: 09/30/1985 | Alma American Mining CorpReported operatorCoors William KReported controller | Neither history importedView source coverage → |
| North Weld GravelWeld, CONear PIERCEMSHA 0505004 | Construction Sand and GravelSurface | AbandonedStatus date: 12/27/2016 | Bucklen Equipment Company IncReported operatorRandy Bucklen; Michael A Bucklen; Judy MayReported controller | Production / employmentView source coverage → |
| Northwest Industrial PitJefferson, COMSHA 0504135 | Construction Sand and GravelSurface | AbandonedStatus date: 06/16/1988 | Northwest Industrial/Gravel IncReported operatorNorthwest Industrial/Gravel IncReported controller | Neither history importedView source coverage → |
| Nucla Sand & GravelMontrose, COMSHA 0504048 | Construction Sand and GravelSurface | AbandonedStatus date: 08/03/1987 | Cotter CorpReported operatorCommonwealth Edison 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.