| CarnationSan Miguel, COMSHA 0501106 | Uranium OreUnderground | AbandonedStatus date: 11/19/1982 | Pinon Ridge Mining LLCReported operatorGeorge GlasierReported controller | Neither history importedView source coverage → |
| Carpenter FlatsMontrose, COMSHA 0504115 | Uranium-Vanadium OreUnderground | AbandonedStatus date: 04/01/1986 | Minerals Recovery CorpReported operatorNewman EricReported controller | Neither history importedView source coverage → |
| Carr Gravel Resource Weld, CONear CarrMSHA 0504441 | Construction Sand and GravelSurface | AbandonedStatus date: 08/27/2014 | L.G. Everist, Inc.Reported operatorL G Everist IncReported controller | Production / employmentSafety recordsView source coverage → |
| Carruthers PitEl Paso, COMSHA 0502961 | Construction Sand and GravelSurface | AbandonedStatus date: 01/08/1979 | El Paso County Dept Of TransportationReported operatorEl Paso County-CoReported controller | Neither history importedView source coverage → |
| CarterGunnison, COMSHA 0500575 | Gold OreUnderground | AbandonedStatus date: 03/24/1986 | Atlas Precious Metals IncReported operatorAtlas CorpReported controller | Neither history importedView source coverage → |
| Carter Lake Enterprises IncLarimer, CONear MasonvilleMSHA 0504123 | Dimension Stone NECSurface | AbandonedStatus date: 03/31/2014 | Carter Lake Enterprises IncReported operatorMatthew SpragueReported controller | Production / employmentSafety recordsView source coverage → |
| Carter-RaymondGunnison, COMSHA 0503300 | Gold OreUnderground | AbandonedStatus date: 04/12/1979 | Timberline Mining CompanyReported operatorTimberline Mining CompanyReported controller | Neither history importedView source coverage → |
| CashierSummit, COMSHA 0503861 | Silver OreUnderground | AbandonedStatus date: 04/23/1985 | Windsor Resources (Us) LtdReported operatorWindsor Resources IncReported controller | Neither history importedView source coverage → |
| Cashin MineMontrose, COMSHA 0503474 | Copper Ore NECUnderground | AbandonedStatus date: 10/25/1982 | New Star CorpReported operatorNew Star CorpReported controller | Neither history importedView source coverage → |
| Cash MineBoulder, CONear BoulderMSHA 0503884 | Gold OreUnderground | AbandonedStatus date: 07/09/2009 | Mount Royale Ventures, LLCReported operatorConsolidated Global Minerals LTDReported controller | Production / employmentSafety recordsView source coverage → |
| CASTLE ROCK QUARRYDouglas, COMSHA 0503930 | Construction Sand and GravelSurface | AbandonedStatus date: 06/18/1998 | Centennial Materials CompanyReported operatorEdward C Levy JrReported controller | Neither history importedView source coverage → |
| Castle Sand PitEl Paso, COMSHA 0500958 | Construction Sand and GravelSurface | AbandonedStatus date: 01/23/1990 | Castle Concrete CompanyReported operatorContinental Materials CorpReported controller | Neither history importedView source coverage → |
| Castle Sand PlantEl Paso, COMSHA 0503669 | Construction Sand and GravelSurface | AbandonedStatus date: 01/31/1990 | Castle Concrete CompanyReported operatorContinental Materials CorpReported controller | Neither history importedView source coverage → |
| Cathedral BluffsGarfield, COMSHA 0503140 | Oil ShaleUnderground | AbandonedStatus date: 02/26/1992 | Emrx CorpReported operatorKofford Kay GReported controller | Neither history importedView source coverage → |
| CATHEY CANYON PITMontezuma, COMSHA 0504718 | Construction Sand and GravelSurface | AbandonedStatus date: 08/30/2001 | Nielsons IncReported operatorSkanska ABReported controller | Production / employmentView source coverage → |
| C-A TractRio Blanco, COMSHA 0503180 | Oil ShaleUnderground | AbandonedStatus date: 02/14/1980 | Ams Inc Of NevadaReported operatorC M IncReported controller | Neither history importedView source coverage → |
| Cautrell & Sons Excavating Murphy PitJackson, COMSHA 0503632 | Construction Sand and GravelSurface | AbandonedStatus date: 08/25/1993 | Cautrell & Sons ExcavatingReported operatorCautrell Dave LReported controller | Neither history importedView source coverage → |
| C Bl 23Montrose, COMSHA 0502963 | Uranium-Vanadium OreUnderground | AbandonedStatus date: 07/16/1980 | Starks MiningReported operatorStarks R L & BobReported controller | Neither history importedView source coverage → |
| C-Bl-23bMontrose, COMSHA 0503465 | Uranium-Vanadium OreUnderground | AbandonedStatus date: 11/19/1982 | Pioneer Uravan IncReported operatorPioneer CorpReported controller | Neither history importedView source coverage → |
| C B Shale Oil LeaseRio Blanco, COMSHA 0503148 | Oil ShaleUnderground | AbandonedStatus date: 04/15/1980 | Ralph M Parsons CompanyReported operatorRalph M Parsons CompanyReported controller | Neither history importedView source coverage → |
| C-B Tract Or C-B Shale Oil TractRio Blanco, COMSHA 0503149 | Oil ShaleUnderground | AbandonedStatus date: 07/01/1980 | Gilbert Corp Of DelawareReported operatorPeter Kiewit Sons' IncReported controller | Neither history importedView source coverage → |
| C-CM-25Montrose, COMSHA 0502338 | Uranium OreUnderground | AbandonedStatus date: 11/14/1984 | Cotter CorpReported operatorGeneral Atomics Uranium ResourcesReported controller | Neither history importedView source coverage → |
| Cdoh PitMesa, COMSHA 0504126 | Construction Sand and GravelSurface | AbandonedStatus date: 04/04/1986 | Kiewit Western CompanyReported operatorPeter Kiewit Sons' IncReported controller | Neither history importedView source coverage → |
| CEDARAPIDS PLANT #2X310Mesa, COMSHA 0503801 | Construction Sand and GravelSurface | AbandonedStatus date: 01/31/2001 | Elam Construction IncReported operatorSummit Materials LLCReported controller | Production / employmentSafety recordsView source coverage → |
| CEDARAPIDS SCREEN-ALLMoffat, CONear CRAIGMSHA 0504956 | Construction Sand and GravelSurface | AbandonedStatus date: 07/08/2011 | Operator not reportedReported operatorController not reportedReported controller | Neither history importedView source coverage → |
| Cedar Canon Strip & AugerFremont, COMSHA 0502775 | Coal (Bituminous)Surface | AbandonedStatus date: 11/12/1980 | Cedar Canon Coal CompanyReported operatorAlvidrez MaryReported controller | Neither history importedView source coverage → |
| Cedar Canon UgFremont, COMSHA 0500247 | Coal (Bituminous)Underground | AbandonedStatus date: 12/08/1975 | Cedar Canon Coal CompanyReported operatorAlvidrez CasimiroReported controller | Neither history importedView source coverage → |
| Cedar Rapids Jaw CrusherCrowley, CONear ManzanolaMSHA 0505122 | Construction Sand and GravelSurface | AbandonedStatus date: 10/09/2020 | Castle Rock Const. Co. of Colo. LLCReported operatorAmy Brooks; Ralph BellReported controller | Neither history importedView source coverage → |
| Cedar Rapids L J - TSKit Carson, CONear FlaglerMSHA 0504589 | Construction Sand and GravelSurface | AbandonedStatus date: 02/01/2022 | Castle Rock Construction Company of Colorado, LLCReported operatorAmy Brooks; Ralph BellReported controller | Production / employmentSafety recordsView source coverage → |
| CEDAR RAPIDS PLANT #3Moffat, COMSHA 0504559 | Construction Sand and GravelSurface | AbandonedStatus date: 11/18/1998 | Elam Construction IncReported operatorSummit Materials LLCReported controller | Neither history importedView source coverage → |