|
Mine
|
County
|
|
T & T Drilling Company
|
San Miguel
|
|
T. N. T. #1 & #3
|
Montrose
|
|
T. P. M. Leasing Company
|
Eagle
|
|
Tabor's Luck
|
San Miguel
|
|
Tacoma Mine
|
Gilpin
|
|
Taff Oil Shale
|
Garfield
|
|
Tail Holt
|
San Miguel
|
|
Taisish
|
Lake
|
|
Tam O' Shanter
|
Pitkin
|
|
Tamasoa
|
Clear Creek
|
|
Tambourine Mine
|
Boulder
|
|
Tammany
|
Boulder
|
|
Tango
|
Montrose
|
|
Tarbox Tunnel
|
Boulder
|
|
Tarn
|
San Juan
|
|
Tarryall Gold and Placer
|
Park
|
|
Tateman Shaft
|
Teller
|
|
Tatum Exploration Drilling
|
San Miguel
|
|
Taylor Gulch
|
Teller
|
|
Taylor Mining Syndicate
|
Chaffee
|
|
Taylor Tunnel
|
Eagle
|
|
Tea Pot Dome Mine
|
San Miguel
|
|
Teagarden Mine
|
Clear Creek
|
|
Teakee
|
Garfield
|
|
Teapot Dome
|
Montrose
|
|
Teddy Bear Mine
|
Clear Creek
|
|
Tek Mining, Milling & Leasing Company
|
Clear Creek
|
|
Telegraph
|
Gilpin
|
|
Telescope Mountain Mining
|
San Juan
|
|
Teller County Air Company
|
Teller
|
|
Telluride
|
Montrose
|
|
Tempest
|
San Juan
|
|
Tempest Mine
|
Summit
|
|
Ten Mile Tunnel
|
Summit
|
|
Tenderfoot - R. A. P. Groups
|
Montezuma
|
|
Tenderfoot Hill Consolidated Mining Company
|
Teller
|
|
Tenderfoot Mine
|
Boulder
|
|
Tenderfoot Mine
|
Lake
|
|
Tenderfoot Mining Company
|
Teller
|
|
Tennessee #1
|
Park
|
|
Tennessee Mine
|
Boulder
|
|
Tennessee Mine
|
Gunnison
|
|
Tennessee Mining, Milling & Tunnel Company
|
Clear Creek
|
|
Tennessee Pass Railroad Tunnel
|
Lake
|
|
Teresa Tunnel
|
Mineral
|
|
Ternahan Mine
|
Gunnison
|
|
Terra Haute Gold & Silver Mining Company
|
Clear Creek
|
|
Terrible Dunderberg
|
Clear Creek
|
|
Terrible Mine
|
Custer
|
|
Terry
|
Boulder
|
|
Teton Exploration
|
Montrose
|
|
Teutonic Mine
|
Teller
|
|
Texas Chief Group
|
La Plata
|
|
Texas Mine
|
Boulder
|
|
Texas Mine
|
Clear Creek
|
|
Thatcher Brothers Company
|
Hinsdale
|
|
The Cave
|
Mesa
|
|
Thelma Mine
|
San Juan
|
|
Theresa Shaft Trail Tunnel
|
Teller
|
|
Thielen
|
Lake
|
|
Third Adventure Mining Company
|
Lake
|
|
Third Venture Mining Company
|
Lake
|
|
Thistledown Mine
|
Ouray
|
|
Thodab
|
Larimer
|
|
Thodave
|
Larimer
|
|
Thomas & Anthony
|
Lake
|
|
Thompson Creek
|
Pitkin
|
|
Thompson Leasing Company
|
Eagle
|
|
Thompson Mine
|
Teller
|
|
Thorn
|
Fremont
|
|
Three Brothers
|
Boulder
|
|
Three Brothers
|
Park
|
|
Three B's Group
|
Gilpin
|
|
Three Jacks
|
Montrose
|
|
Three Kings Mine
|
Summit
|
|
Three Sisters
|
Moffat
|
|
Three Sisters Mine
|
Chaffee
|
|
Thunder Mine
|
Montezuma
|
|
Thunder Tunnel
|
San Juan
|
|
Thunderbird
|
Gilpin
|
|
Thunderbird Mine
|
Gunnison
|
|
Thunderbolt
|
Montrose
|
|
Thunderbolt Mine
|
Boulder
|
|
Thundercloud & Sunspot
|
Mesa
|
|
Tiger and Shields
|
Lake
|
|
Tiger Mine
|
Gilpin
|
|
Tiger Mine
|
Summit
|
|
Tilden
|
Teller
|
|
Tilden Mine
|
Chaffee
|
|
Timberline Mine
|
Fremont
|
|
Times Mine
|
Boulder
|
|
Tiny #1 & 2
|
San Miguel
|
|
Tioga
|
Gunnison
|
|
Tip Top
|
Boulder
|
|
Tip Top Claims
|
Chaffee
|
|
Tip Top Mine
|
Eagle
|
|
Tip Top Mine
|
Summit
|
|
Tippecanoe Mine
|
Boulder
|
|
Titan
|
Gunnison
|
|
Titan Products Company
|
Gunnison
|
|
Titusville
|
San Juan
|
|
To Ka Han Development & Mining Company
|
Summit
|
|
Todd & William Company
|
San Miguel
|
|
Togo
|
Gilpin
|
|
Toledo Mine
|
Clear Creek
|
|
Tolendal Mining Company
|
Lake
|
|
Toll Gate
|
Gilpin
|
|
Tolland County Tunnel
|
Clear Creek
|
|
Toltec Mine
|
San Juan
|
|
Tom & Jerry Mine
|
Summit
|
|
Tom Collins Mine
|
Chaffee
|
|
Tom Moore Mine
|
Clear Creek
|
|
Tom Moore Mine
|
San Juan
|
|
Tom Thumb & M. R. Claims
|
Lake
|
|
Tom Thumb Mine
|
Saguache
|
|
Tom, Dick & Harry Mining
|
Chaffee
|
|
Tomahawk
|
La Plata
|
|
Tomahawk Strip
|
Delta
|
|
Tomboy
|
Custer
|
|
Tomboy
|
Custer
|
|
Tomboy Mine
|
San Miguel
|
|
Tommy White Drilling Company
|
San Miguel
|
|
Tomsick
|
Custer
|
|
Tonopah Ajax
|
Teller
|
|
Too High
|
Montrose
|
|
Top Coal
|
Denver
|
|
Topaz
|
San Miguel
|
|
Tornado Group
|
Saguache
|
|
Tornado Mine
|
Boulder
|
|
Toronto Mine
|
Gilpin
|
|
Torpedo Eclipse
|
Ouray
|
|
Torpedo Mine
|
Clear Creek
|
|
Tourtellotte Park Group
|
Pitkin
|
|
Town House
|
Montrose
|
|
Town Lot
|
Boulder
|
|
Trace Elements Corporation
|
Moffat
|
|
Tracy Brothers Drilling
|
San Miguel
|
|
Trafalgar
|
Chaffee
|
|
Trail Creek
|
Grand
|
|
Trail Creek Project
|
Clear Creek
|
|
Trail Mines Incorporated
|
El Paso
|
|
Tramp
|
Montrose
|
|
Trans-World
|
Mesa
|
|
Trapper Mine
|
Moffat
|
|
Travis Gulch Mining Company
|
Gilpin
|
|
Treasure Comstock Mining, Milling & Tunnel Company
|
Rio Grande
|
|
Treasure Key
|
Gilpin
|
|
Treasure Mine
|
San Juan
|
|
Treasure Mountain Company
|
Routt
|
|
Treasure Mountain Gold Mining Company
|
San Juan
|
|
Treasure Mountain Project
|
San Juan
|
|
Treasure Vault Mine
|
Clear Creek
|
|
Tremont Mining Company
|
Clear Creek
|
|
Tremont Mining Company
|
Gilpin
|
|
Trevillion Tunnel
|
Clear Creek
|
|
Triangulation
|
Montrose
|
|
Trilby Lode
|
San Juan
|
|
Trinidad Basin Strip
|
Las Animas
|
|
Trinidad Lake Project
|
Las Animas
|
|
Trio
|
Boulder
|
|
Tripod Group
|
Montrose
|
|
Trisha Lee Mine
|
Clear Creek
|
|
Triumph
|
Mesa
|
|
Triumph Mine
|
Lake
|
|
Trojan No. 20
|
Mesa
|
|
Tropic Mine
|
Clear Creek
|
|
Troublesome Mine
|
Gilpin
|
|
Trout Creek No. 1
|
Routt
|
|
Troy Mining Company
|
Park
|
|
Truchas Limited
|
Mesa
|
|
Truchas Limited
|
San Miguel
|
|
True Blue Mine
|
Gunnison
|
|
Tucson Mine
|
Lake
|
|
Tungsten Development Company
|
Boulder
|
|
Tungsten King
|
Gilpin
|
|
Tungsten Mine
|
Boulder
|
|
Tungsten Mines Company
|
Boulder
|
|
Tungsten Mountain Mines Company
|
Boulder
|
|
Tungsten Production Company Incorporated
|
Boulder
|
|
Tungsten Products Company
|
Boulder
|
|
Tungsten Uranium Incorporated
|
Rio Blanco
|
|
Tunnel Lode No. 3
|
Clear Creek
|
|
Turner Mine
|
Clear Creek
|
|
Turquoise Chief
|
Lake
|
|
Turquoise Mine
|
Saguache
|
|
Turret Copper Company
|
Chaffee
|
|
Turret Independence Mining Company
|
Chaffee
|
|
Turret Mining & Milling Company
|
Chaffee
|
|
Twenty One
|
El Paso
|
|
Twenty Six
|
Custer
|
|
Twenty Two Mine
|
Montezuma
|
|
Twilight #1
|
Montrose
|
|
Twilight Lode
|
San Juan
|
|
Twin Brothers Mine
|
Boulder
|
|
Twin Butte
|
Gilpin
|
|
Twin Buttes
|
Gilpin
|
|
Twin Canyon Group
|
Montezuma
|
|
Twin Canyon Group
|
Montrose
|
|
Twin Lakes Mining & Milling Company
|
Lake
|
|
Twin Lakes Water Tunnel
|
Pitkin
|
|
Twin Lode Mine
|
Clear Creek
|
|
Twin Pines
|
Fremont
|
|
Twin Ports & Empire
|
Clear Creek
|
|
Twin Sister
|
Boulder
|
|
Two Bar
|
San Miguel
|
|
Two Bit Mining Company
|
Lake
|
|
Two Bits Mine
|
Montrose
|
|
Two Brothers Gold Mining & Milling
|
Boulder
|
|
Two Forks Dam Site Project
|
Jefferson
|
|
Two Kids
|
Ouray
|
|
Two Lassies Mine
|
Gilpin
|
|
Two Sisters
|
Gilpin
|
|
Two Sisters Mine
|
Boulder
|
|
U - Naweep
|
Mesa
|
|
U & V Alloys Corporation
|
Mesa
|
|
U. C. N. C.
|
Mesa
|
|
U. C. N. C.
|
Montrose
|
|
U. C. N. C. Mining Department
|
Dolores
|
|
U. M. U. C. Group
|
Mesa
|
|
U. P.
|
Boulder
|
|
U. S. Bureau of Reclamation
|
Gunnison
|
|
U. S. Bureau of Reclamation
|
Mesa
|
|
U. S. Grant
|
Montrose
|
|
U. S. Treasury Mine
|
Ouray
|
|
U. S. V.
|
San Miguel
|
|
U. S. Vanadium Corporation
|
Garfield
|
|
U. S. Vanadium Salt Works
|
Montrose
|
|
Uintah
|
San Miguel
|
|
Uintah Basin Producing and Refining Company
|
Garfield
|
|
Ultimate Tunnel
|
Mineral
|
|
Uncle Sam
|
Montrose
|
|
Uncle Sam
|
Teller
|
|
Uncle Sam
|
San Miguel
|
|
Uncle Sam Mine
|
Ouray
|
|
Uncompahgre #1
|
Saguache
|
|
Uncompahgre Chief
|
San Juan
|
|
Undecided Group
|
Grand
|
|
Undine Mine
|
Gunnison
|
|
Unexpected Claim
|
Teller
|
|
Unexpected Mine
|
Gilpin
|
|
Union Carbide Nuclear Corporation
|
Dolores
|
|
Union Carbonite Mine
|
Dolores
|
|
Union Leasing Company
|
Teller
|
|
Union Number Five Mine
|
Park
|
|
Union Pacific
|
Boulder
|
|
Union Pacific Rail Road Oil Development Department
|
Jefferson
|
|
Union Shale Plants
|
Garfield
|
|
Unit Mine
|
Gilpin
|
|
Unit Train Loadout Facility
|
Mesa
|
|
Unitah Leasing Company
|
Denver
|
|
United Carnolite Products Company
|
Mesa
|
|
United Empire Group
|
Boulder
|
|
United Gold Mines
|
Teller
|
|
United Imperial Mining
|
Clear Creek
|
|
United Investors Gold Mines & Tunnel Company
|
Clear Creek
|
|
United Metals & Copper Company
|
Boulder
|
|
United Sand & Gravel
|
Mesa
|
|
United States Bureau of Reclamation
|
Montrose
|
|
United States Vanadium Corporation
|
Montrose
|
|
Unity Developing Company
|
Mesa
|
|
Universal Manufacturing & Sales Company
|
Gunnison
|
|
Universal Ore Reduction Company
|
Denver
|
|
Universal Refractory Ore
|
Boulder
|
|
Unknown Lease
|
Lake
|
|
Upper Bushwaker
|
Pitkin
|
|
Upper Dead Pine Mine
|
Teller
|
|
Upper Granite Mine
|
Teller
|
|
Upper Swan Tunnel
|
Dolores
|
|
Up-to-Date Mine
|
Boulder
|
|
Ura
|
Montrose
|
|
Urad Mine
|
Clear Creek
|
|
Urado Uranium Corporation
|
Mesa
|
|
Uranium Girl
|
Montrose
|
|
Uranium Peak
|
Rio Blanco
|
|
Uranium Queen
|
La Plata
|
|
Uranium Queen Mine
|
Jefferson
|
|
Urantah
|
Mesa
|
|
Uranus Mining Company
|
Gilpin
|
|
Uravan #2
|
Montrose
|
|
US Vanadium Corporation
|
Rio Blanco
|
|
USBM Shaft
|
Rio Blanco
|
|
Utah Construction Company
|
Chaffee
|
|
Utah Construction Company
|
Eagle
|
|
Utah Tunnel
|
Summit
|
|
Utarado Mining Company
|
Mesa
|
|
Ute & Ullay Group
|
Hinsdale
|
|
Ute Gold Mining Company
|
Park
|
|
Ute Mine No. 4
|
Montrose
|
|
Ute Rock Group
|
Garfield
|
|
Ute Water Tunnel
|
Mesa
|
|
Utica Mining Corporation
|
Boulder
|
|
Utida
|
Mesa
|
|
Vacation Mine
|
Montrose
|
|
Vadium Corporation of America
|
Montrose
|
|
Vagabond Mine & Mill
|
Larimer
|
|
Valentine
|
Clear Creek
|
|
Valentine
|
Montrose
|
|
Valkyrie Group
|
Ouray
|
|
Vallejo Mine
|
Saguache
|
|
Valley
|
Saguache
|
|
Valley Forge
|
San Juan
|
|
Valley Forge Mine
|
Boulder
|
|
Valley Mine
|
Lake
|
|
Valley Queen Mine
|
Costilla
|
|
Valley View
|
Montrose
|
|
Valley View Claims
|
La Plata
|
|
Valley View Group
|
Gunnison
|
|
Valley View No. 1, 2, 3, 4
|
Chaffee
|
|
Van Group
|
Montrose
|
|
Vanadite
|
Montrose
|
|
Vanadium
|
Garfield
|
|
Vanadium
|
San Miguel
|
|
Vanadium Corporation of America
|
Boulder
|
|
Vanadium Corporation of America
|
Dolores
|
|
Vanadium King
|
Montrose
|
|
Vanadium Queen
|
San Miguel
|
|
Vanaking
|
Mesa
|
|
Vandalia Copper Company
|
Huerfano
|
|
Vanden View
|
Montrose
|
|
Vanderbelt
|
Summit
|
|
Vanura
|
San Miguel
|
|
Varney Tunnel
|
Pitkin
|
|
Vasco Group
|
Boulder
|
|
Vasquez Jones Pass Tunnel
|
Grand
|
|
Vasquez Tunnel
|
Clear Creek
|
|
Vay Claims
|
San Juan
|
|
Vega Dam Water Tunnel
|
Mesa
|
|
Velvet Valley Rainbow
|
Gilpin
|
|
Venir Mine
|
Lake
|
|
Vento
|
Fremont
|
|
Ventura Oil Fields
|
Garfield
|
|
Venture
|
Montrose
|
|
Venture Mine
|
Gunnison
|
|
Verde Mining
|
Custer
|
|
Vermillion Mines & Reduction Company
|
Gilpin
|
|
Vermillion Mining Company
|
Gilpin
|
|
Vermillion Tunnel
|
San Juan
|
|
Vernon Mining
|
Ouray
|
|
Vesuvius Mine
|
Lake
|
|
Veta Glad
|
San Miguel
|
|
Veta Mad
|
San Miguel
|
|
Veta Wad
|
San Miguel
|
|
Vicinity
|
Boulder
|
|
Vickery Mine
|
Boulder
|
|
Victor
|
Boulder
|
|
Victor #3 & 6
|
San Miguel
|
|
Victor Mine
|
Boulder
|
|
Victor Mine
|
Clear Creek
|
|
Victor Mine
|
Gunnison
|
|
Victor Mine
|
Teller
|
|
Victoria Mine
|
Boulder
|
|
Victoria Mine
|
Gilpin
|
|
Victory
|
Boulder
|
|
Victory #3
|
La Plata
|
|
Victory Gold and Silver
|
Park
|
|
Victory Mine
|
Gunnison
|
|
Victory Tunnel
|
Summit
|
|
Videll Mining Company
|
Conejos
|
|
Vidler Tunnel
|
Clear Creek
|
|
Vienna Mine
|
Saguache
|
|
View of the Park
|
Hinsdale
|
|
Viking Strip
|
Jackson
|
|
Villa Grove Turquoise
|
Saguache
|
|
Villa Mine
|
Clear Creek
|
|
Village Belle
|
Jackson
|
|
Vindicator
|
Teller
|
|
Vinnie Mine
|
Lake
|
|
Violet Ray Mine
|
Boulder
|
|
Virgin
|
Montrose
|
|
Virginia
|
Custer
|
|
Virginia
|
Gilpin
|
|
Virginia Canyon
|
Clear Creek
|
|
Virginia City Mine
|
Clear Creek
|
|
Virginia Mine
|
Boulder
|
|
Vulcan Lode
|
Custer
|
|
Vulcan Mine
|
Clear Creek
|
|
Vulcan Project
|
Gunnison
|
|
Vulcan Townsite & Mining Company
|
El Paso
|
|
Vulcan Tunnel
|
Custer
|
|
Vulcano Mine
|
Teller
|
|
Vulture
|
San Juan
|
