|
Mine
|
County
|
|
D & J Mine
|
Saguache
|
|
D & RGW Construction Company
|
Fremont
|
|
D & S. L. Railway Tunnel No. 10
|
Boulder
|
|
D. A. Sullivan Claim
|
Garfield
|
|
Dail Owen
|
Boulder
|
|
Daisy Mine
|
Gunnison
|
|
Dakota
|
Montrose
|
|
Dakota Leasing Company
|
Eagle
|
|
Dalco
|
Hinsdale
|
|
Dalelu Group
|
Mesa
|
|
Dallas Mine
|
Gilpin
|
|
Damon and Hardwood
|
Teller
|
|
Dan
|
San Miguel
|
|
Dan Kelly Drilling Company
|
Mesa
|
|
Dan Patch
|
Montrose
|
|
Dana Mining Company
|
Boulder
|
|
Dante Mine
|
Teller
|
|
Dara Mine
|
San Juan
|
|
Dauser Mine and Mill
|
Park
|
|
Davenport Tunnel
|
Clear Creek
|
|
Davey Leasing & Mining Company
|
Ouray
|
|
David Lode
|
Boulder
|
|
Davis Tunnel
|
San Miguel
|
|
Davy Leasing & Mining Company
|
San Juan
|
|
Dawn of Hope
|
Hinsdale
|
|
Dawn Tunnel
|
Custer
|
|
Day Spring
|
Gilpin
|
|
Day Star Mines
|
Gunnison
|
|
De Beque Shale Oil Company
|
Garfield
|
|
De Caprivi Mine
|
Clear Creek
|
|
De Lux Mine
|
Gilpin
|
|
Dead Horse Mine
|
Teller
|
|
Dead Jack Mine
|
Clear Creek
|
|
Dead Medicine Mine
|
Boulder
|
|
Dead Shot Mine
|
Teller
|
|
Deadwood
|
San Miguel
|
|
Deadwood Mine
|
Teller
|
|
Deal Mining Company
|
Mesa
|
|
Dear Runs
|
Mesa
|
|
Debbie Jean
|
Fremont
|
|
Deceiver
|
Custer
|
|
Deer Season #1
|
Montrose
|
|
Deer Shaft
|
Montrose
|
|
Defender Mine
|
Custer
|
|
Degge - Clark Tungsten Mining Milling & Refining Company
|
Boulder
|
|
Del Oro #2
|
Saguache
|
|
Del Oro Mines
|
Lake
|
|
Delano - Jer - Bar Group
|
San Juan
|
|
Delaware
|
Gilpin
|
|
Delaware Mine
|
Chaffee
|
|
Delaware Mine
|
Summit
|
|
Delmonico
|
Gilpin
|
|
Delmonico Mine
|
Teller
|
|
Delores & Eleanor
|
Gilpin
|
|
Delta
|
San Miguel
|
|
Deluxe Shaft
|
San Miguel
|
|
Democracy Shaft
|
Gilpin
|
|
Demsey
|
Park
|
|
Dendet Gold Mining Corporation
|
Gilpin
|
|
Dendet Mining Company
|
Gilpin
|
|
Denton Strip
|
Routt
|
|
Denver
|
Custer
|
|
Denver - Boulder Tungsten P & D Company
|
Boulder
|
|
Denver - Napoleon
|
San Juan
|
|
Denver & Rio Grande Western Railroad Tunnel
|
Mesa
|
|
Denver Group
|
Boulder
|
|
Denver Mine
|
Montrose
|
|
Denver Mine
|
Summit
|
|
Denver Mining & Manufacturing Company
|
Chaffee
|
|
Denver Mining & Milling
|
Lake
|
|
Denver Municipal Water Project
|
Boulder
|
|
Denver No. 2
|
Lake
|
|
Denver Tungsten Mining & Milling Company
|
Boulder
|
|
Denver Tunnel
|
Clear Creek
|
|
Denver Tunnel Company
|
Boulder
|
|
Dependable #9
|
Saguache
|
|
Depression
|
San Miguel
|
|
Depression Mine
|
Larimer
|
|
Depression No. 6
|
Mesa
|
|
Deremo
|
San Miguel
|
|
Dermo
|
San Miguel
|
|
Des Moines Mine
|
Boulder
|
|
Desdemona
|
Chaffee
|
|
Design Mines Company
|
Clear Creek
|
|
Desperado
|
Rio Blanco
|
|
Detroit and Colorado Mining Company
|
San Juan
|
|
Detroit Group
|
Hinsdale
|
|
Detroit Mine
|
Summit
|
|
Devercaux Brother Claims
|
Rio Blanco
|
|
Dew Drop
|
Boulder
|
|
Dew Drop
|
Gilpin
|
|
Dewarest Tungsten Manufacturing Company
|
Boulder
|
|
Deweese - Dye Dam
|
Custer
|
|
Dewey Milling Company
|
Denver
|
|
Dexter Mine
|
Clear Creek
|
|
Dexter Mine
|
Teller
|
|
Diamond Drillers
|
Rio Blanco
|
|
Diamond Jack Mine
|
Summit
|
|
Diamond Joe Mine
|
Clear Creek
|
|
Diamond Lil Tunnel
|
Gilpin
|
|
Diamond Mountain
|
Clear Creek
|
|
Diamond Mountain Mining Company
|
Clear Creek
|
|
Diamond Shaft
|
Lake
|
|
Diana
|
Montrose
|
|
Dick #3
|
San Juan
|
|
Dickie #3
|
San Miguel
|
|
Dierks Mine
|
Clear Creek
|
|
Dig Gold Mine
|
Teller
|
|
Dig More Mining & Milling Company
|
Boulder
|
|
Dillion Dam Tunnel
|
Summit
|
|
Dime Mine
|
Boulder
|
|
Dinero Tunnel
|
Lake
|
|
Dinkirk Mine
|
Clear Creek
|
|
Dire Gold
|
San Juan
|
|
Dirigo Mine & Mill
|
Gilpin
|
|
Dirt Merchants Construction
|
Gunnison
|
|
Discovery #1
|
Park
|
|
Dismant Adit
|
Moffat
|
|
Dividend
|
San Miguel
|
|
Dividend Gold Mines Company
|
Ouray
|
|
Dixie
|
Mesa
|
|
Dixie Group
|
Larimer
|
|
Dixie Mine
|
Boulder
|
|
Dixie Mine
|
Clear Creek
|
|
Dixie Mine
|
Custer
|
|
Doagy No. 2
|
Montrose
|
|
Doctor Group
|
Clear Creek
|
|
Doctor Jack Pot Mine
|
Teller
|
|
Doctor Mine
|
Gunnison
|
|
Dodd Group
|
San Juan
|
|
Dodge Patent
|
Boulder
|
|
Dolly B Shaft
|
Lake
|
|
Dolly Varden
|
Teller
|
|
Dolly Varden Mine
|
Boulder
|
|
Dolly Varden Mine
|
Hinsdale
|
|
Dolly Varden Mine
|
Park
|
|
Dolmite Shaft
|
Lake
|
|
Dolomite
|
Chaffee
|
|
Dolores
|
Gilpin
|
|
Dolores
|
San Miguel
|
|
Dolores Group
|
Montrose
|
|
Dolores Mine
|
Hinsdale
|
|
Dolores River Mine
|
San Miguel
|
|
Dome
|
San Juan
|
|
Dome Mine
|
Lake
|
|
Domingo Company
|
San Juan
|
|
Dominion Mine
|
Clear Creek
|
|
Don Pedro
|
Summit
|
|
Donald L
|
Montrose
|
|
Donaldson
|
Clear Creek
|
|
Donell Group
|
Larimer
|
|
Donna Juanita
|
Clear Creek
|
|
Donna K
|
Montrose
|
|
Doodle Bug Gold Mining
|
Teller
|
|
Doolittle Mine
|
Boulder
|
|
Doris Lode
|
Gilpin
|
|
Doris Ruby Group
|
Chaffee
|
|
Dorothy
|
Montrose
|
|
Dorothy
|
Teller
|
|
Dorothy May
|
San Miguel
|
|
Dorothy Mine
|
Boulder
|
|
Dorothy Mine
|
Gilpin
|
|
Dotsero Cutoff Tunnel
|
Eagle
|
|
Double Cross
|
Dolores
|
|
Double Eagle
|
Gilpin
|
|
Double Eagle
|
Park
|
|
Doublejack
|
Montrose
|
|
Douglas Mountain Copper Mine
|
Moffat
|
|
Dove
|
Clear Creek
|
|
Doves Nest Extension
|
Clear Creek
|
|
Doyle Mine
|
Montezuma
|
|
Doyle Schuyler Holdings
|
Garfield
|
|
Dozer
|
Boulder
|
|
Dragon Claim
|
San Miguel
|
|
Drake Shaft
|
Park
|
|
Dreamer
|
Fremont
|
|
Dreckshage Company
|
Gunnison
|
|
Driscoll Trucking Company
|
Fremont
|
|
Driscoll Tunnel
|
Fremont
|
|
Dropner Company
|
Clear Creek
|
|
Druid Mine
|
Gilpin
|
|
Drum Major
|
Park
|
|
Drummond Mine
|
Clear Creek
|
|
Dublin Mine
|
Gilpin
|
|
Duchess No. 1 & 2
|
Montrose
|
|
Duggan Adit
|
Montrose
|
|
Dumas Mine
|
Gilpin
|
|
Dump Mine
|
Gilpin
|
|
Dumpite
|
Chaffee
|
|
Duncan
|
Gunnison
|
|
Duncan Mine
|
Clear Creek
|
|
Dunkin Mine
|
Summit
|
|
Dunkin Shaft
|
Lake
|
|
Dunmore Mine
|
Ouray
|
|
Dupont Tunnel
|
Gunnison
|
|
Durango Girl Gold Mining & Milling Company
|
La Plata
|
|
Durfee Mining
|
Mesa
|
|
Durfee Wagon Drill
|
Mesa
|
|
Durgen Tunnel
|
Pitkin
|
|
Durias Mine
|
Boulder
|
|
Dusty
|
Montrose
|
|
Dutch Creek # 1
|
Pitkin
|
|
Dutch Creek # 2
|
Pitkin
|
|
Dutch Park Mine
|
Boulder
|
|
Dutchess Mine
|
Gilpin
|
|
Dyer Mountain Extension Mine
|
Lake
|
|
Dynamite
|
Montrose
|
|
Dynamo
|
San Miguel
|
|
E - D
|
Saguache
|
|
E. A. Alexander Mine
|
Ouray
|
|
E. B. F. Mine
|
Teller
|
|
E. P. Webb Drilling Company
|
Rio Blanco
|
|
Eagen Mine
|
Clear Creek
|
|
Eagle
|
Clear Creek
|
|
Eagle - Hawk
|
Saguache
|
|
Eagle - New Jersey - Zinc - Empire Zinc
|
Eagle
|
|
Eagle #12
|
Montrose
|
|
Eagle & Mary Alice Claims
|
Hinsdale
|
|
Eagle Bird
|
San Juan
|
|
Eagle Coal
|
Weld
|
|
Eagle Mine
|
Clear Creek
|
|
Eagle Mine
|
Saguache
|
|
Eagle Mine
|
Summit
|
|
Eagle No. 5 & No. 9
|
Moffat
|
|
Eagle Pass Mining & Milling Company
|
La Plata
|
|
Eagle River Tunnel & Mining Company
|
Eagle
|
|
Eagle Tunnel
|
Dolores
|
|
Eagles Nest
|
Clear Creek
|
|
Eagles Nest
|
Gilpin
|
|
Earl
|
Boulder
|
|
Earl W. Lode
|
Gunnison
|
|
Early Bird
|
San Juan
|
|
Early Bird Mining & Milling Company
|
Ouray
|
|
Early Morning
|
San Miguel
|
|
East Boston Mine
|
Boulder
|
|
East Butte Mine
|
Clear Creek
|
|
East Calamity
|
Mesa
|
|
East Columbia Mine
|
Boulder
|
|
East Griffith Mine
|
Clear Creek
|
|
East Harsh Mine
|
Gilpin
|
|
East Lake Milling & Mining Company
|
Eagle
|
|
East Lake Mine
|
Clear Creek
|
|
East London
|
Park
|
|
East Opera Box
|
Montrose
|
|
East Portal
|
Larimer
|
|
East Queen of the Hills
|
Mesa
|
|
East Red Mountain
|
Chaffee
|
|
East Salt Creek
|
Garfield
|
|
East Santa Fe Mine
|
Clear Creek
|
|
East Slide Mine
|
Boulder
|
|
East Spavia Mine
|
Gilpin
|
|
East Williams Mine
|
Gilpin
|
|
Eastern Sioux Mining Company
|
San Juan
|
|
Eastern Star
|
Garfield
|
|
Eastern Star Mine
|
Saguache
|
|
Eastern Star Mine
|
San Juan
|
|
Easton B
|
San Miguel
|
|
Eastside
|
Garfield
|
|
Eastside Mine
|
Park
|
|
Eaton Holdings
|
Garfield
|
|
Echo No. 4 & No. 6
|
Montrose
|
|
Eclipse
|
Mesa
|
|
Eclipse
|
San Miguel
|
|
Eclipse Mine
|
Boulder
|
|
Eclipse Mine
|
Chaffee
|
|
Eclipse Mine
|
Pitkin
|
|
Eclipse Tunnel
|
Lake
|
|
Economy Dump
|
Teller
|
|
Edna and Edna #1
|
Ouray
|
|
Edna Mine
|
Hinsdale
|
|
Edna Mining
|
Lake
|
|
Edna Strip
|
Routt
|
|
Edwards
|
Gunnison
|
|
Edwards Mine
|
Clear Creek
|
|
Ega Mining & Milling Company
|
Boulder
|
|
Eggleston Tunnel
|
Conejos
|
|
Egyptian Mine
|
Gilpin
|
|
Eida Tunnel
|
Gilpin
|
|
Eight Mile
|
Fremont
|
|
Eiler's Dump
|
Lake
|
|
El Capitan
|
Eagle
|
|
El Crest Mining Company
|
Teller
|
|
El Mahdi Mine
|
Ouray
|
|
El Paso Mine
|
Teller
|
|
El Plomo Mining & Reduction Company
|
Fremont
|
|
El Rico
|
Conejos
|
|
Elder Mine
|
San Miguel
|
|
Eldorado
|
Gilpin
|
|
Eldorado Mine
|
Summit
|
|
Eldredge Group
|
Teller
|
|
Eleanor Jane & Capitol Mine
|
Clear Creek
|
|
Electra Gold Mining & Milling Company
|
Eagle
|
|
Electric Tunnel
|
Lake
|
|
Eleven Mile Canon Dam
|
Park
|
|
Eleven O'Clock Lode
|
Chaffee
|
|
Elgin Smelter Dump
|
Lake
|
|
Eliza Tunnel
|
Lake
|
|
Elizabeth
|
Mesa
|
|
Elizabeth Group
|
Mesa
|
|
Elizabeth Mine
|
Park
|
|
Elk Head
|
Boulder
|
|
Elk Head Mine
|
Routt
|
|
Elk Mine
|
San Juan
|
|
Elk Mountain Mines Company
|
Summit
|
|
Elk Mt. Mine
|
Grand
|
|
Elk Park Group
|
San Juan
|
|
Elk Valley
|
Gilpin
|
|
Elkhorn
|
Summit
|
|
Elkhorn & Marino
|
Saguache
|
|
Elkhorn Mine
|
Routt
|
|
Elkhorn Mine
|
Teller
|
|
Elkhorn Shaft
|
Lake
|
|
Elkton Mine
|
Teller
|
|
Ella C Mine
|
Boulder
|
|
Ella Craig
|
Mesa
|
|
Ella Mine
|
Gilpin
|
|
Ella Tunnel
|
Lake
|
|
Ella W. Mine
|
Teller
|
|
Elliott, Barber & Lincoln
|
Clear Creek
|
|
Ellis Mine
|
Teller
|
|
Ellison
|
San Miguel
|
|
Ellithorpe Shaft
|
Teller
|
|
Elmer & Bents Shafts
|
Teller
|
|
Elmore Tunnel
|
Gilpin
|
|
Elsie Mine
|
Boulder
|
|
Elsinore Mine
|
Gilpin
|
|
Elva Elma Tunnel
|
Lake
|
|
Ely
|
San Miguel
|
|
Emancipation Group
|
Clear Creek
|
|
Emancipation Mine
|
Boulder
|
|
Embargo
|
Saguache
|
|
Emerald Exploration Company
|
Chaffee
|
|
Emil Johnson Lease
|
Ouray
|
|
Emily Mine & Mill
|
Boulder
|
|
Emily Mining Company
|
Lake
|
|
Emma L.
|
Teller
|
|
Emma Lou
|
Pitkin
|
|
Emma May Mine
|
Montrose
|
|
Emma Mine
|
Clear Creek
|
|
Emma Mine
|
Dolores
|
|
Emma Tunnel
|
San Juan
|
|
Emmett Mine
|
Boulder
|
|
Emmons
|
Delta
|
|
Emperius Mine
|
Mineral
|
|
Empire
|
Montrose
|
|
Empire
|
San Miguel
|
|
Empire Chief
|
Hinsdale
|
|
Empire City Mine
|
Clear Creek
|
|
Empire Mine
|
Boulder
|
|
Empire Tunnel
|
Clear Creek
|
|
Empire Zinc Company
|
Lake
|
|
Empire Zinc Division
|
Gunnison
|
|
Empress
|
Clear Creek
|
|
Empress Josephine
|
Saguache
|
|
Empress Mine
|
Boulder
|
|
Empress Mine
|
Summit
|
|
Empress Tunnel
|
Clear Creek
|
|
End of the Trail
|
Garfield
|
|
Endeavor
|
Clear Creek
|
|
Endner Mine
|
Gunnison
|
|
Endomile
|
Jackson
|
|
Energy Strip #1, 2, 3
|
Routt
|
|
Engineers Luck Mine
|
Teller
|
|
England Gold Mining & Milling
|
Clear Creek
|
|
Engleville
|
Las Animas
|
|
Enterprise
|
Gilpin
|
|
Enterprise Mine
|
Boulder
|
|
Enterprise Mine
|
Gunnison
|
|
Enterprise Mine
|
Teller
|
|
Enterprise Mining Company
|
Clear Creek
|
|
Enterprise Strip
|
Delta
|
|
Equator Mine
|
Boulder
|
|
Equinox
|
Montrose
|
|
Equity Consolidated Mines Company
|
Clear Creek
|
|
Equity Mine
|
Mineral
|
|
Erickson Mine
|
Summit
|
|
Erie #28
|
Saguache
|
|
Erie Mines Company
|
Teller
|
|
Escanaba
|
Boulder
|
|
Esmeralda
|
San Juan
|
|
Esmeralda Mine
|
Boulder
|
|
Esmeralda Mine
|
Clear Creek
|
|
Esmerelda Mine
|
Park
|
|
Esperanza Mine
|
Saguache
|
|
Esperanza Tunnel
|
Clear Creek
|
|
Essex Mine
|
Gilpin
|
|
Essie Mine
|
Saguache
|
|
Estel Crosscut
|
San Miguel
|
|
Estelle Company
|
San Juan
|
|
Estrella Mining Compnay
|
Lake
|
|
Ethiopean Mine
|
Gunnison
|
|
Etigrade
|
Summit
|
|
Etna Mine
|
Park
|
|
Etta M Mine
|
Summit
|
|
Ettretura Mining Company
|
Lake
|
|
Euclid Group
|
Montezuma
|
|
Eula Belle
|
Montrose
|
|
Eureka
|
Gunnison
|
|
Eureka
|
Summit
|
|
Eureka Group
|
Clear Creek
|
|
Eureka Mine
|
Boulder
|
|
Eureka Mine
|
Boulder
|
|
Eureka Mine
|
Gilpin
|
|
Eureka Mine
|
Lake
|
|
Eureka Mining Company
|
Chaffee
|
|
European & Park Group
|
Clear Creek
|
|
Eurydice Mine
|
Conejos
|
|
Eva
|
Montrose
|
|
Eva
|
Ouray
|
|
Eva Group
|
Clear Creek
|
|
Eva L. Consolidated Mines Company
|
Teller
|
|
Evans Groups
|
Boulder
|
|
Evelyn Shaft
|
Lake
|
|
Evening Star
|
Eagle
|
|
Evening Star
|
Mesa
|
|
Evening Star
|
Park
|
|
Evening Star No. 1 & 2
|
Montrose
|
|
Everett
|
Clear Creek
|
|
Everett Development Company
|
Saguache
|
|
Everett Mine
|
Clear Creek
|
|
