|
Mine
|
County
|
|
1905
|
Boulder
|
|
1-F Tunnel
|
Moffat
|
|
45 - 90
|
Montezuma
|
|
5 Mine
|
Boulder
|
|
A & B Mining Company
|
Clear Creek
|
|
A & H
|
Montrose
|
|
A. B. G.
|
Dolores
|
|
A. C. A. Mine
|
Clear Creek
|
|
A. E. C.
|
San Juan
|
|
A. E. C.
|
San Juan
|
|
A. L. & M. Mine
|
Boulder
|
|
A. L. Bradford
|
San Miguel
|
|
A. P. Tunnel
|
Clear Creek
|
|
A. V. Shaft
|
Lake
|
|
A. V. Slag Dump
|
Lake
|
|
A. Y. & Minnie Mine
|
Lake
|
|
Aaberite
|
Gunnison
|
|
Abandon Shaft
|
Custer
|
|
Abe Lincoln
|
Teller
|
|
Ace in the Hole Mine
|
Gilpin
|
|
Acme Mine
|
Boulder
|
|
Acme Uranium Mill
|
San Miguel
|
|
Acme Uranium Mill
|
Summit
|
|
Aco Mining Company
|
Summit
|
|
Ada Bell Mine
|
Teller
|
|
Adak
|
Montrose
|
|
Adams
|
San Juan
|
|
Adams Shaft
|
Lake
|
|
Adelaide Mine
|
Lake
|
|
Adeline & Corydon
|
Gilpin
|
|
Adna Group
|
Clear Creek
|
|
Aetna Mine
|
Gilpin
|
|
After Dinner &
Perseverance
|
Gilpin
|
|
Agnes Mine
|
Teller
|
|
Aguilar Imperial
|
Las Animas
|
|
Air Academy Tunnel
|
El Paso
|
|
Ajax - Cave - Lucky Day
|
Mesa
|
|
Ajax #2 Tunnel
|
Hinsdale
|
|
Ajax & Canyon
Portals
|
Mesa
|
|
Ajax Mine
|
Clear Creek
|
|
Ajax Mine
|
Mesa
|
|
Ajax Mine
|
Teller
|
|
Ajax Mine
|
Teller
|
|
Akers & Kunz
|
San Juan
|
|
Akin Tunnel
|
Custer
|
|
Akney Copper Mining
Company
|
Larimer
|
|
Akron Mine
|
Gunnison
|
|
Aksarben Mine
|
Chaffee
|
|
Al
|
San Miguel
|
|
Ala Makee Mine
|
Boulder
|
|
Aladdin Gold Mining
Company
|
Lake
|
|
Alamo Mines Company
|
Teller
|
|
Alaska & Yukon
|
Saguache
|
|
Alaska Mine
|
Gilpin
|
|
Alaska Tunnel
|
Boulder
|
|
Albers Mine
|
Ouray
|
|
Albert Beacon Gold
Mining Company
|
Teller
|
|
Albert Lea Tungsten
Mining & Milling Company
|
Boulder
|
|
Albert Tunnel
|
Gilpin
|
|
Albro Mine
|
Clear Creek
|
|
Alcante District
|
Lake
|
|
Alcoa Shaft
|
Jackson
|
|
Alexander Mine
|
Clear Creek
|
|
Alhambra #2
|
Gunnison
|
|
Alhambra Mine
|
Teller
|
|
Alhambra Tunnel
|
Boulder
|
|
Alice
|
Gilpin
|
|
Alice
|
San Miguel
|
|
Alice Blue Gown
|
Summit
|
|
Alice Mine
|
Boulder
|
|
Alice MIne
|
Clear Creek
|
|
Alice Mine
|
Custer
|
|
Alice Mine
|
Teller
|
|
Alie Bell Mine
|
Chaffee
|
|
Alke
|
Montrose
|
|
All Right Shaft
|
Lake
|
|
All Star
|
Montrose
|
|
Allard Beryllium Mine
|
Chaffee
|
|
Allard Mining Company
|
La Plata
|
|
Allegany Shaft
|
Lake
|
|
Allegheny Mine
|
San Miguel
|
|
Allen Emery
|
Summit
|
|
Allen Mine
|
Las Animas
|
|
Allen Park Power &
Mining Company
|
Boulder
|
|
Allgrove Mining &
Milling Company
|
Boulder
|
|
Alliance Gold Mining
Company
|
Teller
|
|
Alliance Mine
|
Summit
|
|
Allie Mine
|
Gilpin
|
|
Allied Gold Mining
Company
|
Boulder
|
|
Allied Metals
Corporation
|
Denver
|
|
Alligator Tunnel
|
Eagle
|
|
Allison Drilling Company
|
San Miguel
|
|
Alllison Drilling
Company
|
Dolores
|
|
Alma
|
Ouray
|
|
Alma Lincoln
|
Clear Creek
|
|
Alma P. M. & S.
Company
|
Ouray
|
|
Almaden Mine
|
Clear Creek
|
|
Aloha Gold Mining
Company
|
Teller
|
|
Alpha Gold & Silver
Mining Company
|
Gilpin
|
|
Alphidor Mining &
Refining Company
|
San Juan
|
|
Alpine Horn Mine
|
Boulder
|
|
Alpine Mine
|
Park
|
|
Alpine Mine
|
Pitkin
|
|
Alpine Mine
|
Routt
|
|
Alpine Mine
|
Saguache
|
|
Alpine Tunnel
|
Eagle
|
|
Alpine Tunnel
|
Lake
|
|
Alps Consolidated Mining
Company
|
Lake
|
|
Alps Group
|
Gilpin
|
|
Alsa R. Shaft
|
Teller
|
|
Alta - St. Louis Mine
|
San Miguel
|
|
Alta Group
|
Montrose
|
|
Alta Mines Leasing
Company
|
San Juan
|
|
Alter & Walcott
|
Teller
|
|
Altoona
|
Ouray
|
|
Alturas Shale Oil
Company
|
Garfield
|
|
Amanda Mine
|
Teller
|
|
Amazon
|
Gunnison
|
|
America
|
Dolores
|
|
American
|
Lake
|
|
American Eagle
|
Montrose
|
|
American Eagle
|
Summit
|
|
American Eagle Mine
|
San Miguel
|
|
American Eagles Mine
|
Teller
|
|
American Fluorspar
|
Chaffee
|
|
American Frenchman
Tunnel
|
San Miguel
|
|
American Girl
|
Gilpin
|
|
American Gold &
Platinum Company
|
Boulder
|
|
American Gold Mining
|
Ouray
|
|
American Leduc
|
Mesa
|
|
American Metals of
Colorado
|
Summit
|
|
American Mine
|
Boulder
|
|
American Mine
|
San Miguel
|
|
American Mine
|
Summit
|
|
American Mine and Mill
|
Park
|
|
American Mine Services
|
Saguache
|
|
American Mineral Oil
Company
|
Mesa
|
|
American Minerals
|
La Plata
|
|
American Mines
Development Company
|
Gilpin
|
|
American Mining &
Refining Corporation
|
San Juan
|
|
American Nettie
|
Ouray
|
|
American Rare Metals
Company
|
San Miguel
|
|
American Resource
Company
|
San Miguel
|
|
American Shale Refining
|
Garfield
|
|
American Sisters
|
Clear Creek
|
|
American Smelting &
Refining Tunnel
|
Lake
|
|
American Tunnel
|
San Juan
|
|
American Uranium
Engineering Company
|
Mesa
|
|
Amethyst Queen
|
Mesa
|
|
Amity Mine
|
Lake
|
|
Amy Mining Company
|
Lake
|
|
Amy Paul Mine
|
Boulder
|
|
Anaconda
|
Eagle
|
|
Anaconda Mine
|
Gunnison
|
|
Anaconda Mine
|
Teller
|
|
Anamosa
|
Clear Creek
|
|
Anaweep Mine
|
San Miguel
|
|
Anchor
|
Montrose
|
|
Anchor Mine
|
Boulder
|
|
Anchor Mine
|
Gilpin
|
|
Anchor Tunnel
|
Lake
|
|
Anchoria Leland Mine
|
Teller
|
|
Anderson and Benkelman
|
Teller
|
|
Andrew & Jackson
|
San Juan
|
|
Andrus
|
San Miguel
|
|
Andy Lowe Mine
|
Clear Creek
|
|
Angel Mining Company
|
Ouray
|
|
Angeline Lode
|
Gilpin
|
|
Anglo Celt
|
Gilpin
|
|
Anglo Saxon
|
Clear Creek
|
|
Ann Ritiage Mine &
Milling Company
|
Gilpin
|
|
Anna B Mine
|
Clear Creek
|
|
Anna C & L7
|
Gilpin
|
|
Anna J Shaft
|
Teller
|
|
Anna Lee
|
Custer
|
|
Anna May
|
Montrose
|
|
Anna May Wells Mine
|
Teller
|
|
Annex Milling &
Mines Company
|
Gilpin
|
|
Annex No. 2 Strip
|
Fremont
|
|
Annie
|
Rio Grande
|
|
Annie C.
|
Chaffee
|
|
Annie D. Lode
|
Teller
|
|
Annie H. Mine
|
Gilpin
|
|
Annie Lode
|
Gilpin
|
|
Annie Mine
|
Eagle
|
|
Annie Mine
|
Gilpin
|
|
Anoka Lease
|
Clear Creek
|
|
Anon
|
Clear Creek
|
|
Antelope Mine
|
Clear Creek
|
|
Antelope Tunnel
|
Lake
|
|
Antero
|
Chaffee
|
|
Antlers Gold Mining
& Milling Company
|
Routt
|
|
Apex
|
Gilpin
|
|
Apex #2
|
Routt
|
|
Apex Copper Company Mine
|
Park
|
|
Appel Developing Company
|
Routt
|
|
Appel, A. F.
|
Routt
|
|
Applejack
|
Montrose
|
|
April
|
Gilpin
|
|
April #1
|
San Miguel
|
|
April Fool Leasing
Company
|
Mesa
|
|
April Fool Leasing
Company
|
Mineral
|
|
April Mine
|
San Miguel
|
|
April No. 1
|
Montrose
|
|
Arapahoe Group
|
Boulder
|
|
Arasta Leasing Company
|
San Juan
|
|
Arastra Gulch Mining
& Milling Company
|
Alamosa
|
|
Arcadia Consolidated
Mining Company
|
Teller
|
|
Archibald Mine
|
Park
|
|
Archibell
|
Clear Creek
|
|
Arequa
|
Teller
|
|
Argeata Mutual Mines
Company
|
San Miguel
|
|
Argeata Mutual Mines
Company
|
Summit
|
|
Argentine Mine
|
San Miguel
|
|
Argentine Mine
|
Summit
|
|
Argo Mine
|
Boulder
|
|
Argo Mine
|
Clear Creek
|
|
Argo Reduction & Ore
Purchasing Company
|
Gilpin
|
|
Argo Tunnel
|
Clear Creek
|
|
Argo Tunnel
|
Gilpin
|
|
Argon Gold Mining &
Milling Company
|
Teller
|
|
Ariadne
|
Clear Creek
|
|
Ariadne Corporation
|
San Juan
|
|
Arkansas Mine
|
Lake
|
|
Army and Navy
|
Ouray
|
|
Aro
|
Jackson
|
|
Aroostook
|
San Juan
|
|
Arps Brothers Leasing
Company
|
Ouray
|
|
Arps Leasing Company
|
Ouray
|
|
Arrowhead
|
Mesa
|
|
Arrowhead
|
Montrose
|
|
Arthur Mine
|
Clear Creek
|
|
Arthur Mining &
Exploration Company
|
Clear Creek
|
|
Artic Mine
|
Summit
|
|
Ascension
|
Jefferson
|
|
Ashby Tunnel
|
Clear Creek
|
|
Ashland
|
Clear Creek
|
|
Aspen Bi - Metallic
|
Pitkin
|
|
Aspen Concentrator
|
Pitkin
|
|
Aspen Creek Mine
|
Chaffee
|
|
Aspen Mine
|
San Juan
|
|
Aspen Sampling Company
|
Pitkin
|
|
Aspen Tunnel
|
Ouray
|
|
Athey Group
|
Montrose
|
|
Atkinson Mine
|
Gilpin
|
|
Atlanta
|
Teller
|
|
Atlanta Mine
|
Boulder
|
|
Atlantic & Rifle
Group
|
Clear Creek
|
|
Atlantic Group
|
San Juan
|
|
Atlantic Mine
|
Boulder
|
|
Atlantic Mine
|
Chaffee
|
|
Atlantic Mine
|
Gilpin
|
|
Atlantis Mine
|
Lake
|
|
Atlas
|
Lake
|
|
Atlas
|
Mesa
|
|
Atlas
|
San Miguel
|
|
Atlas Mine
|
Clear Creek
|
|
Atlas Mine
|
Ouray
|
|
Atomic Energy Commission
|
Mesa
|
|
Atomic Energy Commission
|
Montrose
|
|
Auburn
|
San Juan
|
|
Augusta
|
Gunnison
|
|
Augusta
|
Jefferson
|
|
Aurelia Lode
|
Gilpin
|
|
Aurora Rampart Tunnels
No. 1 & No. 2
|
Douglas
|
|
Aurum Enterprises
Incorporated
|
Boulder
|
|
Austin
|
Mesa
|
|
Austria Mine
|
San Juan
|
|
Ava Jay
|
San Miguel
|
|
Avoca Virginia Mine
|
Gunnison
|
|
Aztec
|
Dolores
|
|
Aztec
|
Montrose
|
|
Aztec Mine
|
Boulder
|
