| Lemoine PitDelta, COMSHA 0504015 | Construction Sand and GravelSurface | AbandonedStatus date: 06/10/1985 | Delta County CommissionersReported operatorDelta County-CoReported controller | Neither history importedView source coverage → |
| Lemon PitLa Plata, COMSHA 0503423 | Construction Sand and GravelSurface | AbandonedStatus date: 10/13/1982 | Burnett Construction CompanyReported operatorSiegrist Construction CompanyReported controller | Neither history importedView source coverage → |
| Lemon PitLa Plata, COMSHA 0503459 | Construction Sand and GravelSurface | AbandonedStatus date: 04/24/1980 | Price ConstructionReported operatorAA PriceReported controller | Neither history importedView source coverage → |
| Leone-GardnerHuerfano, COMSHA 0504010 | Construction Sand and GravelSurface | AbandonedStatus date: 06/05/1986 | Domenic Leone Construction CompanyReported operatorLeone John VReported controller | Neither history importedView source coverage → |
| Leroux Creek MineDelta, COMSHA 0502530 | Coal (Bituminous)Underground | AbandonedStatus date: 04/01/1974 | Leroux Creek MiningReported operatorOwens Richard OReported controller | Neither history importedView source coverage → |
| Letty Jones MineSan Miguel, COMSHA 0502671 | Uranium OreUnderground | AbandonedStatus date: 08/18/1981 | Dravo CorpReported operatorDravo CorpReported controller | Neither history importedView source coverage → |
| LevicyGunnison, COMSHA 0503949 | Gold OreUnderground | AbandonedStatus date: 07/20/1987 | Halcyon Mining CompanyReported operatorHines Alex EReported controller | Neither history importedView source coverage → |
| Leyden PitJefferson, COMSHA 0500201 | Common ShaleSurface | AbandonedStatus date: 06/17/1981 | G C Bennetts & Sons IncReported operatorBennetts RonReported controller | Neither history importedView source coverage → |
| LibertyOuray, CONear OurayMSHA 0504893 | Gold OreUnderground | AbandonedStatus date: 10/12/2018 | The Mining Company, Inc.Reported operatorKenneth J Orvis; Cristy L OrvisReported controller | Production / employmentSafety recordsView source coverage → |
| Liberty BellMesa, COMSHA 0503130 | Uranium OreSurface | AbandonedStatus date: 12/11/1978 | Marion BirchReported operatorArthur Marion BirchReported controller | Neither history importedView source coverage → |
| Liberty MineMesa, CONear GatewayMSHA 0504819 | Uranium-Vanadium OreUnderground | AbandonedStatus date: 06/10/2005 | Liberty Mining LLCReported operatorMike D ShumwayReported controller | Production / employmentView source coverage → |
| Lily Mine PortableChaffee, COMSHA 0504405 | Crushed, Broken MarbleSurface | AbandonedStatus date: 09/12/1995 | U S SoilReported operatorLionelle Joe EReported controller | Neither history importedView source coverage → |
| Lily Mine/Portable CrusherChaffee, CONear MonarchMSHA 0504907 | Dimension MarbleSurface | AbandonedStatus date: 01/28/2009 | Kiewit Western CompanyReported operatorPeter Kiewit Sons' IncReported controller | Neither history importedView source coverage → |
| Limon PlantLincoln, COMSHA 0501995 | Construction Sand and GravelSurface | AbandonedStatus date: 06/14/1993 | Andrews Sand & GravelReported operatorOrtis AndrewsReported controller | Neither history importedView source coverage → |
| LincolnMesa, COMSHA 0503612 | Uranium-Vanadium OreUnderground | AbandonedStatus date: 10/13/1983 | S S & S CompanyReported operatorSeymour Frank L & Kimball J M CormackReported controller | Neither history importedView source coverage → |
| Lincoln MineWeld, CONear ErieMSHA 0500305 | Coal (Lignite)Underground | Abandoned and SealedStatus date: 03/29/1982 | Coal Operating CompanyReported operatorAsher James DReported controller | Neither history importedView source coverage → |
| Lindauer PitGarfield, COMSHA 0503494 | Construction Sand and GravelSurface | AbandonedStatus date: 08/13/1982 | Colorado Department Of HighwaysReported operatorState Of ColoradoReported controller | Neither history importedView source coverage → |
| LindseyWeld, COMSHA 0503390 | Construction Sand and GravelSurface | AbandonedStatus date: 08/27/1979 | Colorado Department Of HighwaysReported operatorState Of ColoradoReported controller | Neither history importedView source coverage → |
| Ling MinePark, COMSHA 0503974 | Gold OreUnderground | AbandonedStatus date: 05/23/1985 | Century ExplorationReported operatorInternational Brenmac Development CorpReported controller | Neither history importedView source coverage → |
| LinklodeGilpin, COMSHA 0502760 | Gold OreUnderground | AbandonedStatus date: 06/27/1977 | Linklode Mining CompanyReported operatorLinklode Mining CompanyReported controller | Neither history importedView source coverage → |
| Little Bonanza MillSaguache, COMSHA 0502951 | Gold OreFacility | AbandonedStatus date: 02/29/1984 | Griffin Ranch PartnershipReported operatorGriffin Ranch PartnershipReported controller | Neither history importedView source coverage → |
| Little CommanderKit Carson, COMSHA 0504030 | Construction Sand and GravelSurface | AbandonedStatus date: 06/01/1987 | Sterling Paving CompanyReported operatorKoppers Company IncReported controller | Neither history importedView source coverage → |
| Little FawnMontrose, COMSHA 0502924 | Uranium OreUnderground | AbandonedStatus date: 02/12/1979 | C & D Exploration IncReported operatorDeitz Ralph KReported controller | Neither history importedView source coverage → |
| Little GiantSan Juan, COMSHA 0502611 | Gold OreUnderground | AbandonedStatus date: 07/01/1976 | Little Giant Mining CompanyReported operatorLittle Giant Mining CompanyReported controller | Neither history importedView source coverage → |
| Little Hope MineTeller, CONear Cripple CreekMSHA 0504837 | Gold OreUnderground | AbandonedStatus date: 11/15/2007 | Rhino Mining, LLCReported operatorMilford R Ashworth; Melvin R GydesenReported controller | Production / employmentSafety recordsView source coverage → |
| Little Ida MineSan Juan, COMSHA 0503212 | Gold OreUnderground | AbandonedStatus date: 08/27/1979 | Frank Montonati Mining CompanyReported operatorFrank Montonati Mining CompanyReported controller | Neither history importedView source coverage → |
| Little MaudeSan Juan, COMSHA 0503081 | Gold OreUnderground | AbandonedStatus date: 08/16/1985 | Little Maude IncReported operatorSmith Loren EReported controller | Neither history importedView source coverage → |
| Little SilverDolores, COMSHA 0503878 | Silver OreUnderground | AbandonedStatus date: 11/17/1983 | James J CostelloReported operatorCostello James JReported controller | Neither history importedView source coverage → |
| Littleton PlantArapahoe, COMSHA 0500964 | Construction Sand and GravelSurface | AbandonedStatus date: 12/14/1988 | Cooley Gravel CompanyReported operatorEnglish China Clays PLCReported controller | Neither history importedView source coverage → |
| L & M Oro Ii IncorporatedYuma, COMSHA 0503491 | Gold OreUnderground | AbandonedStatus date: 12/08/1981 | L & M Oro Ii IncReported operatorL & M Oro Ii IncReported controller | Neither history importedView source coverage → |