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  • All fields: pit
(700 results)



Display: 50

    • Borrow Pit at Station 2726

    • Borrow Pit at Station 2726

    • Borrow pit at Station 2726 to Station 2728 man at left in bottom of pit, Showing excessive width of Borrow Pit not required for excavation," Eagle or Garfield County, Colorado, shows the Denver and Rio Grande Western railroad tracks to Glenwood...

    • Denver and Rio Grande Western Railroad Company--1920-1930.; Eagle County (Colo.)--1920-1930.; Garfield County (Colo.)--1920-1930.; Railroad tracks--Colorado--Eagle County--1920-1930.

    • [between 1925 and 1929]
    • The open pit at Climax mine near Leadville, Colorado.

    • The open pit at Climax mine near Leadville, Colorado.

    • View of an open pit Molybdenum mine near Leadville, Lake County, Colorado; mining machinery includes a scoop-crane, a dump truck, a tracklayer tractor, and a truck.

    • Climax Mine (Lake County, Colo.)--1940-1970.; Leadville (Colo.)--1940-1970.; Dump trucks--Colorado--Leadville--1940-1970.; Hoisting machinery--Colorado--Leadville--1940-1970.; Mining--Colorado--Leadville--1940-1970.

    • [between 1940 and 1970?]
    • Glenwood Canyon series

    • Glenwood Canyon series

    • View of Shoshone borrow pit, Station 2994 and 3002, on Denver and Rio Grande Western Railroad tracks in Glenwood Canyon, Garfield County, Colorado (beginning of contract #11962); shows rock canyon walls, power lines, and men.

    • Denver and Rio Grande Western Railroad Company--1920-1930.; Garfield County (Colo.)--1920-1930.; Glenwood Canyon (Colo.)--1920-1930.; Holes--Colorado--Garfield County--1920-1930.; Railroad tracks--Colorado--Garfield County--1920-1930.

    • [between 1925 and 1929]
    • Open pit mining comes to Butte - to stay

    • Open pit mining comes to Butte - to stay

    • View inside the Berkeley copper open pit mine, Silver Bow County, Montana. Shows Steam shovels and trucks.

    • Berkeley Pit (Silver Bow County, Mont.)--1950-1960.; Silver Bow County (Mont.)--1950-1960.; Copper mining--Montana--Silver Bow County--Butte--1950-1960.; Mining--Montana--Silver Bow County--Butte--1950-1960.; Steam shovels--Montana--Silver Bow...

    • October 27, 1957
    • Gold Pan Pit

    • Gold Pan Pit

    • Miners pose on wooden scaffolding and near the pit of the Gold Pan Pit near Breckenridge (Summit County), Colorado.

    • Breckenridge (Colo.)--1900-1920.; Gold Pan Mine (Summit County, Colo.)--1900-1920.; Holes--Colorado--Breckenridge--1900-1920.; Hydraulic mining--Colorado--Breckenridge--1900-1920.; Miners--Colorado--Breckenridge--1900-1920.;...

    • [between 1900 and 1913]
    • Borrow pit

    • Borrow pit

    • Standing at Station 2852 plus 50 looking easterly at a borrow pit, along the Denver and Rio Grande Western railroad tracks to Glenwood Springs, Eagle of Garfield County, Colorado.

    • Denver and Rio Grande Western Railroad Company--1920-1930.; Eagle County (Colo.)--1920-1930.; Garfield County (Colo.)--1920-1930.; Railroad tracks--Colorado--Garfield County--1920-1930.

    • [between 1925 and 1929]
    • Borrow pit

    • Borrow pit

    • "Standing at Station 2751 looking easterly," Eagle or Garfield County, Colorado, along the borrow pit and the Denver and Rio Grande Western railroad tracks to Glenwood Springs.

    • Denver and Rio Grande Western Railroad Company--1920-1930.; Eagle County (Colo.)--1920-1930.; Garfield County (Colo.)--1920-1930.; Railroad tracks--Colorado--Eagle County--1920-1930.

    • [between 1925 and 1929]
    • Shooting pit

    • Shooting pit

    • View of a cement shooting pit at the Denver Municipal Trap Club at Sloans Lake Park in Denver, Colorado. Another shooting pit is nearby.

    • Denver Municipal Trap Club--Facilities--1930-1940.; Trapshooting--Colorado--Denver--1930-1940.; Denver (Colo.)--1930-1940.; Sloans Lake Park (Denver, Colo.)--1930-1940.; Parks--Colorado--Denver--1930-1940.; Sports & recreation...

    • [1939]
    • Mesa Verde, excavating

    • Mesa Verde, excavating

    • A pit between Pithouses B and C of Step House, a cliff dwelling in Mesa Verde National Park, stands in the foreground. Small slabs of sandstone line the sides of the pithouse in the background. A piece of dark wood protrudes from the dirt ground of...

    • Mesa Verde National Park (Colo.)--1920-1930.; Step House (Colo.)--1920-1930.; Pit dwellings--Colorado--1920-1930.; Archaeological sites--Colorado--1920-1930.; Cliff dwellings--Colorado--1920-1930.

    • [1926?]
    • Mesa Verde, excavations

    • Mesa Verde, excavations

    • A large, dirt pit stands between Pithouses B and C at the Step House cliff dwelling in Mesa Verde National Park. Pithouse C is in the background. People have left footprints on the dirt ground.

    • Mesa Verde National Park (Colo.)--1920-1930.; Step House ( Colo.)--1920-1930.; Pit dwellings--Colorado--1920-1930.; Archaeological sites--Colorado--1920-1930.; Cliff dwellings--Colorado--1920-1930.

    • [1926?]
    • Bingham copper mine

    • Bingham copper mine

    • View of the Bingham Copper Mine, in Bingham Canyon, Utah. Shows an enormous open pit mine with tiers, mine railroad tracks, freight cars filled with ore, and electric towers for the railroad.

    • Kennecott Copper Corporation. Utah Copper Division--1920-1950.; Bingham Canyon (Utah)--1920-1950.; Bingham Copper Mine (Salt Lake County, Utah)--1920-1950.; Utah--1920-1950.; Copper mining--Utah--1920-1950.; Mine railroads--Utah--1920-1950.;...

    • [between 1920 and 1950?]
    • Copper mine, S. - L. City

    • Copper mine, S. - L. City

    • View shows surface mining equipment and buildings at the bottom of the open pit Kennecott Bingham Copper mine, Utah. Other equipment is visible working on the many tiers of the pit.

    • Kennecott Copper Corporation. Utah Copper Division--1910-1930.; Mine buildings--Utah--1910-1930.; Bingham Copper Mine (Salt Lake County, Utah)--1910-1930.; Utah--1910-1930.; Copper mining--Utah--1910-1930.; Mining--Utah--1910-1930.; Strip...

    • [between 1910 and 1930?]
    • Stage at Red Rocks Park

    • Stage at Red Rocks Park

    • A view of the orchestra pit and stage at Red Rocks Amphitheater during construction, Red Rocks Park, Morrison, Jefferson County, Colorado. The ramp houses and "Sounding rocks" are in the background.

    • Denver Mountain Parks--1930-1950.; Red Rocks Amphitheater (Colo.)--1930-1950.; Morrison (Colo.)--1930-1950.; Red Rocks Park (Colo.)--1930-1950.; Amphitheaters--Colorado--Morrison--1930-1950.; Construction--Colorado--Morrison--1930-1950.;...

    • [between 1930 and 1950?]
    • Placer mining, Mont.

    • Placer mining, Mont.

    • Two miners in a gold placer mine pit, Montana; one operates a nozzle (monitor) and one uses a shovel. Shows sluice boxes in pit, a woman with a horse stands on the rim.

    • Gold mining--Montana--1880-1890.; Hydraulic Mining--Montana--1880-1890.; Mining--Montana--1880-1890.; Women--Montana--1880-1890.

    • [between 1880 and 1890?]
    • Glenwood Canyon series

    • Glenwood Canyon series

    • View of borrow pit at Station 2849 to 2857, and Denver and Rio Grande Western Railroad tracks, Glenwood Canyon, Garfield County, Colorado.

    • Denver and Rio Grande Western Railroad Company--1920-1930.; Garfield County (Colo.)--1920-1930.; Glenwood Canyon (Colo.)--1920-1930.; Holes--Colorado--Garfield County--1920-1930.; Railroad tracks--Colorado--Garfield County--1920-1930.

    • [between 1925 and 1929]
    • Glenwood Canyon series

    • Glenwood Canyon series

    • View of Shoshone borrow pit and Denver and Rio Grande Western Railroad tracks in Glenwood Canyon, Garfield County, Colorado.

    • Denver and Rio Grande Western Railroad Company--1920-1930.; Garfield County (Colo.)--1920-1930.; Glenwood Canyon (Colo.)--1920-1930.; Holes--Colorado--Garfield County--1920-1930.; Railroad tracks--Colorado--Garfield County--1920-1930.

    • [between 1925 and 1929]
    • Glenwood Canyon series

    • Glenwood Canyon series

    • View of Station 2879 and 2886 on Denver and Rio Grande Western Railroad tracks with canyon walls and power lines, Glenwood Canyon, Garfield County, Colorado. A man is in the borrow pit.

    • Denver and Rio Grande Western Railroad Company--1920-1930.; Garfield County (Colo.)--1920-1930.; Glenwood Canyon (Colo.)--1920-1930.; Holes--Colorado--Garfield County--1920-1930.; Railroad tracks--Colorado--Garfield County--1920-1930.

    • [between 1925 and 1929]
    • Glenwood Canyon series

    • Glenwood Canyon series

    • Borrow pit Station 3104 to 3110 showing east portion of pit along the Denver and Rio Grande Western Railroad tracks, Glenwood Canyon, Garfield County, Colorado.

    • Denver and Rio Grande Western Railroad Company--1920-1930.; Garfield County (Colo.)--1920-1930.; Glenwood Canyon (Colo.)--1920-1930.; Railroad tracks--Colorado--Garfield County--1920-1930.

    • [between 1925 and 1929]
    • Glenwood Canyon series

    • Glenwood Canyon series

    • Borrow pit Station 3104 to 3110 showing west portion of pit along Denver and Rio Grande Western Railroad tracks, Glenwood Canyon, Garfield County, Colorado.

    • Denver and Rio Grande Western Railroad Company--1920-1930.; Garfield County (Colo.)--1920-1930.; Glenwood Canyon (Colo.)--1920-1930.; Holes--Colorado--Garfield County--1920-1930.; Railroad tracks--Colorado--Garfield County--1920-1930.

    • [between 1925 and 1929]
    • Glenwood Canyon series

    • Glenwood Canyon series

    • View of borrow pit at Station 3083 and 3085 on Denver and Rio Grande Western Railroad tracks in Glenwood Canyon, Garfield County, Colorado. Man on center of old track; signal light reads: "3522."

    • Denver and Rio Grande Western Railroad Company--1920-1930.; Garfield County (Colo.)--1920-1930.; Glenwood Canyon (Colo.)--1920-1930.; Holes--Colorado--Garfield County--1920-1930.; Railroad tracks--Colorado--Garfield County--1920-1930.

    • [between 1925 and 1929]
    • Glenwood Canyon series

    • Glenwood Canyon series

    • View of Shoshone borrow pit on Denver and Rio Grande Western Railroad tracks in Glenwood Canyon, Garfield County, Colorado; shows rock canyon walls and power lines.

    • Denver and Rio Grande Western Railroad Company--1920-1930.; Garfield County (Colo.)--1920-1930.; Glenwood Canyon (Colo.)--1920-1930.; Holes--Colorado--Garfield County--1920-1930.; Railroad tracks--Colorado--Garfield County--1920-1930.

    • [between 1925 and 1929]
    • Glenwood Canyon series

    • Glenwood Canyon series

    • View of borrow pit at Station 3088 and 3092, on Denver and Rio Grande Western Railroad tracks in Glenwood Canyon, Garfield County, Colorado. Man on center of old track.

    • Denver and Rio Grande Railroad Company--1920-1930.; Garfield County (Colo.)--1920-1930.; Glenwood Canyon (Colo.)--1920-1930.; Holes--Colorado--Garfield County--1920-1930.; Railroad tracks--Colorado--Garfield County--1920-1930.

    • [between 1925 and 1929]
    • Glenwood Canyon series

    • Glenwood Canyon series

    • View of Station 2879 and 2886 on Denver and Rio Grande Western Railroad tracks, Glenwood Canyon, Garfield County, Colorado; Colorado River and power lines show in background. A man is in the borrow pit.

    • Denver and Rio Grande Western Railroad Company--1920-1930.; Garfield County (Colo.)--1920-1930.; Glenwood Canyon (Colo.)--1920-1930.; Holes--Colorado--Garfield County--1920-1930.; Railroad tracks--Colorado--Garfield County--1920-1930.

    • [between 1925 and 1929]
    • Glenwood Canyon series

    • Glenwood Canyon series

    • View of Shoshone borrow pit on Denver and Rio Grande Western Railroad tracks in Glenwood Canyon, Garfield County, Colorado; also shows sheer rock formations.

    • Denver and Rio Grande Western Railroad Company--1920-1930.; Garfield County (Colo.)--1920-1930.; Glenwood Canyon (Colo.)--1920-1930.; Holes--Colorado--Garfield County--1920-1930.; Railroad tracks--Colorado--Garfield County--1920-1930.

    • [between 1925 and 1929]
    • Ludlow strike

    • Ludlow strike

    • Mining camp in Forbes (Las Animas County), Colorado shows: rows of miner's cabins, and ore pit carts on tracks.

    • Mine railroads--Cars--Colorado--Forbes--1910-1920.; Forbes (Colo.)--1910-1920.; Cabins--Colorado--Forbes--1910-1920.; Coal mining--Colorado--Forbes--1910-1920.; Mining--Colorado--Forbes--1910-1920.

    • [1914]
    • The Bottomless Pit, Pike's Peak

    • The Bottomless Pit, Pike's Peak

    • View of the Bottomless Pit, a crater, and rock formations on Pikes Peak, El Paso County, Colorado.

    • Bottomless Pit (Colo.)--1880-1900.; El Paso County (Colo.)--1880-1900.; Pikes Peak (Colo.)--1880-1900.; Craters--Colorado--El Paso County--1880-1900.

    • [between 1882 and 1900?]
    • The Bottomless Pit, Pikes Peak

    • The Bottomless Pit, Pikes Peak

    • View of the Bottomless Pit, a crater, and rock formations on Pikes Peak, El Paso County, Colorado.

    • Bottomless Pit (Colo.)--1880-1900.; El Paso County (Colo.)--1880-1900.; Pikes Peak (Colo.)--1880-1900.; Craters--Colorado--El Paso County--1880-1900.

    • [between 1882 and 1900?]
    • San Miguel Valley below Saw Pit, Colo.

    • San Miguel Valley below Saw Pit, Colo.

    • View of Rio Grande Southern Railroad tracks below Saw Pit (San Miguel County), Colorado; San Juan mountains are in the background.

    • Rio Grande Southern Railroad--1890-1900.; Sawpit (Colo.)--1890-1900.; Railroad tracks--Colorado--Sawpit--1890-1900.

    • [between 1890 and 1900]
    • Saw Pit, Colo.

    • Saw Pit, Colo.

    • View of Saw Pit (San Miguel County), Colorado, shows wooden buildings, Rio Grande Southern Railroad tracks, San Juan mountains, and the San Miguel River.

    • San Miguel River (Colo.)--1890-1900.; Rio Grande Southern Railroad--1890-1900.; Sawpit (Colo.)--1890-1900.; Railroad tracks--Colorado--Sawpit--1890-1900.; Rivers--Colorado--Denver--1890-1900.

    • [between 1890 and 1900]
    • Swink / Holly sugar mill construction concrete pit

    • Swink / Holly sugar mill construction concrete pit

    • A man poses in a concrete pit at the Holly Sugar Company mill construction site near Swink (Otero County), Colorado. He wears a wide-brimmed hat.

    • Holly Sugar Corporation--1900-1910.; Swink (Colo.)--1900-1910.; Construction--Colorado--Swink--1900-1910.; Sugar industry--Colorado--Swink--1900-1910.

    • [between 1904 and 1906]
    • On the edge of the crater, Pikes Peak

    • On the edge of the crater, Pikes Peak

    • View of the edge of the Bottomless Pit, a crater on Pike's Peak, El Paso County, Colorado.

    • Bottomless Pit (Colo.)--1880-1900.; El Paso County (Colo.)--1880-1900.; Pikes Peak (Colo.)--1880-1900.; Craters--Colorado--El Paso County--1880-1900.

    • [between 1882 and 1900?]
    • Gold Pan Pit showing timbering

    • Gold Pan Pit showing timbering

    • Miners work on timber supports near a crane at the Gold Pan Pit near Breckenridge (Summit County), Colorado. Other miners aim monitors or nozzles at the ground nearby.

    • Breckenridge (Colo.)--1900-1920.; Gold Pan Mine (Summit County, Colo.)--1900-1920.; Hoisting machinery--Colorado--Breckenridge--1900-1920.; Holes--Colorado--Breckenridge--1900-1920.; Hydraulic mining--Colorado--Breckenridge--1900-1920.;...

    • [between 1900 and 1913]
    • Gold Pan Pit and Gold Pan Shops north end of Breckenridge

    • Gold Pan Pit and Gold Pan Shops north end of Breckenridge

    • Panoramic view of the Gold Pan Pit and Shops near Breckenridge (Summit County), Colorado.

    • Breckenridge (Colo.)--1900-1920.; Gold Pan Mine (Summit County, Colo.)--1900-1920.; Hydraulic mining--Colorado--Breckenridge--1900-1920.; Mining--Colorado--Breckenridge--1900-1920.

    • [between 1900 and 1913]
    • Gold Pan Mining Co, pit

    • Gold Pan Mining Co, pit

    • Miners pose near the scaffolding of the Gold Pan Pit near Breckenridge (Summit County), Colorado. Elevated conveyor belts are nearby.

    • Breckenridge (Colo.)--1900-1920.; Gold Pan Mine (Summit County, Colo.)--1900-1920.; Holes--Colorado--Breckenridge--1900-1920.; Hydraulic mining--Colorado--Breckenridge--1900-1920.; Miners--Colorado--Breckenridge--1900-1920.;...

    • [between 1900 and 1913]
    • Kennecott pit, Bingham, Utah

    • Kennecott pit, Bingham, Utah

    • View shows equipment working the many tiers of the Bingham copper mine, the world's largest open pit copper mine, Utah.

    • Kennecott Copper Corporation. Utah Copper Division--1960-1970.; Bingham Copper Mine (Salt Lake County, Utah)--1960-1970.; Utah--1960-1970.; Copper mining--Utah--1960-1970.; Mining--Utah--1960-1970.; Strip mining--Utah--1960-1970.

    • December, 1960
    • Work train, Kennecott Copper Co. pit, Bingham, Utah

    • Work train, Kennecott Copper Co. pit, Bingham, Utah

    • View shows a train working one of the many tiers of the Bingham copper mine, the world's largest open pit copper mine, Utah.

    • Kennecott Copper Corporation. Utah Copper Division--1960-1970.; Bingham Copper Mine (Salt Lake County, Utah)--1960-1970.; Utah--1960-1970.; Copper mining--Utah--1960-1970.; Hoisting machinery--Utah--1960-1970.; Mine railroads--Utah--1960-1970.;...

    • 1960
    • Ore train, Kennecott Copper pit, Bingham, Utah

    • Ore train, Kennecott Copper pit, Bingham, Utah

    • View shows a fully loaded ore train on its way out of the Bingham copper mine, the world's largest open pit copper mine, Utah.

    • Kennecott Copper Corporation. Utah Copper Division--1960-1970.; Bingham Copper Mine (Salt Lake County, Utah)--1960-1970.; Utah--1960-1970.; Copper mining--Utah--1960-1970.; Freight cars--Utah--1960-1970.; Mine railroads--Utah--1960-1970.;...

    • 1960
    • Kennecott pit, Bingham, Utah

    • Kennecott pit, Bingham, Utah

    • View shows railroad tracks and equipment working on many levels of the Bingham copper mine, the world's largest open pit copper mine, Utah.

    • Kennecott Copper Corporation. Utah Copper Division--1960-1970.; Bingham Copper Mine (Salt Lake County, Utah)--1960-1970.; Utah--1960-1970.; Copper mining--Utah--1960-1970.; Mine railroads--Utah--1960-1970.; Mining--Utah--1960-1970.; Strip...

    • 1960
    • Borrow pit

    • Borrow pit

    • "Borrow pit at Station 2803 to Station 2806," along the Denver and Rio Grande Western railroad tracks to Glenwood Springs, Eagle or Garfield County, Colorado.

    • Denver and Rio Grande Western Railroad Company--1920-1930.; Eagle County (Colo.)--1920-1930.; Garfield County (Colo.)--1920-1930.; Railroad tracks--Colorado--Garfield County--1920-1930.

    • [between 1925 and 1929]
    • Borrow pit

    • Borrow pit

    • View of borrow pit Station 2849 to Station 2857 at east end looking westerly, along the Colorado River and Denver and Rio Grande Western railroad tracks to Glenwood Springs, Garfield County, Colorado.

    • Denver and Rio Grande Western Railroad Company--1920-1930.; Colorado River (Colo.-Mexico)--1920-1930.; Garfield County (Colo.)--1920-1930.; Railroad tracks--Colorado--Garfield County--1920-1930.; Rivers--Colorado--Garfield County--1920-1930.

    • [between 1925 and 1929]
    • Borrow pit

    • Borrow pit

    • "View in east end of borrow pit Station 2743 to Station 2759," Eagle or Garfield County, Colorado, shows the Denver and Rio Grande Western railroad tracks to Glenwood Springs.

    • Denver and Rio Grande Western Railroad Company--1920-1930.; Eagle County (Colo.)--1920-1930.; Garfield County (Colo.)--1920-1930.; Railroad tracks--Colorado--Eagle County--1920-1930.

    • [between 1925 and 1929]
    • Mecca Pit elevator

    • Mecca Pit elevator

    • Miners work on the Mecca Pit elevator (tramway), Colorado.

    • Summit County (Colo.)--1870-1890.; Miners--Colorado--Summit County--1870-1890.; Mining--Colorado--Summit County--1870-1890.

    • [between 1870 and 1890]
    • Auto races at Overland Park

    • Auto races at Overland Park

    • View of automobile races at Overland Park in Denver, Colorado. Spectators sit in grandstands. One man in a pit crew wears coveralls that read: "Baker Special".

    • Pit crews--Colorado--Denver--1920-1930.; Denver (Colo.)--1920-1930.; Overland Park (Denver, Colo.)--1920-1930.; Automobile racing--Colorado--Denver--1920-1930.; Racing automobiles--Colorado--Denver--1920-1930.;...

    • [between 1920 and 1930]
    • Auto races at Overland Park race track

    • Auto races at Overland Park race track

    • Spectators watch as race cars line up at the start of a race at Overland Park in Denver, Colorado. A tow truck from AAA is parked in front of the car line; shows pit crews and race drivers. Overland Park race track became a golf course in the...

    • Pit crews--Colorado--Denver--1920-1930.; Denver (Colo.)--1920-1930.; Overland Park (Denver, Colo.)--1920-1930.; Automobile racing drivers--Colorado--Denver--1920-1930.; Automobile racing--Colorado--Denver--1920-1930.;...

    • [between 1920 and 1930]
    • Early auto race at Overland Park

    • Early auto race at Overland Park

    • Spectators watch an auto race from the grandstand at the Overland Park race track in Denver, Colorado. Pit crews push the race cars to jump start them at the start line.

    • Pit crews--Colorado--Denver--1920-1940.; Denver (Colo.)--1920-1940.; Overland Park (Denver, Colo.)--1920-1940.; Automobile racing--Colorado--Denver--1920-1940.; Racing automobiles--Colorado--Denver--1920-1940.;...

    • [between 1920 and 1931]
    • View of Gold Run pit

    • View of Gold Run pit

    • A miner uses a hydraulic nozzle (monitor) fitted with a rock counterbalance in the pit of the Gold Run Mine, a gold placer mine near Breckenridge, Summit County, Colorado.

    • Gold Run Mine (Breckenridge, Colo.); Breckenridge (Colo.)--1880-1890.; Gold miners--Colorado--Breckenridge--1880-1890.; Gold mining--Colorado--Breckenridge--1880-1890.; Hydraulic Mining--Colorado--Breckenridge--1880-1890.;...

    • [between 1880 and 1890?]
    • Old workings of a pit

    • Old workings of a pit

    • View of an abandoned gold placer mining pit near Breckenridge, Summit County, Colorado shows: pipes and tailings with valley and mountains in background.

    • Abandoned mines--Colorado--Breckenridge--1880-1890.; Breckenridge (Colo.)--1880-1890.; Gold mining--Colorado--Breckenridge--1880-1890.; Hydraulic Mining--Colorado--Breckenridge--1880-1890.; Mining--Colorado--Breckenridge--1880-1890.

    • [between 1880 and 1890?]
    • Miners inside a gold mine pit

    • Miners inside a gold mine pit

    • Miners use shovels and picks in a sluice and operate a crane on a hydraulic placer gold mining dredge, Park County, Colorado. Pipes run down the wall into the pit.

    • Dredges--Colorado--Park County--1900-1910.; Gold dredging--Colorado--Park County--1900-1910.; Park County (Colo.)--1900-1910.; Drilling & boring machinery--Colorado--Park County--1900-1910.; Hydraulic mining--Colorado--Park County--1900-1910.;...

    • [1900?]
    • Gold Pan pit

    • Gold Pan pit

    • Gold Pan mine pit, Breckenridge, Summit County, Colorado shows: dredge, flume, pipe support structure, and ore conveyor.

    • Dredges--Colorado--Breckenridge--1900-1910.; Gold dredging--Colorado--Breckenridge--1900-1910.; Breckenridge (Colo.)--1900-1910.; Hydraulic mining--Colorado--Breckenridge--1900-1910.; Mining--Colorado--Breckenridge--1900-1910.

    • [1900?]

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