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  • All fields: dredges
(78 results)



Display: 50

    • Mining dredge

    • A man stands near the Derry Dredge, Empire Gold Dredging Company's hydraulic placer bucket-line vessel, near Leadville (Lake County), Colorado.
    • Lake County (Colo.)--1910-1930.; Dredges--American--Colorado--Lake County--1910-1930.; Gold mining--Colorado--Lake County--1910-1930.; Hydraulic mining--Colorado--Lake County--1910-1930.
    • [between 1915 and 1926]
    • The Colo. Gold Dredging Co. on the D.& R.G.R.R. at Russell, Colo.

    • Men in suits, one woman and workmen stand on top of and beside a Colorado Gold Dredging Company hydraulic placer gold mining dredge near Russell, Veta Pass (La Veta Pass), Colorado. Shows an American flag on a flagpole.
    • Russell (Colo.)--1900-1910.; Dredges--American--Colorado--Russell--1900-1910.; Gold mining--Colorado--Russell--1900-1910.; Hydraulic mining--Colorado--Russell--1900-1910.
    • [between 1900 and 1910?]
    • The Colo. Gold Dredging Co. on the D.& R.G.R.R. at Russell Colo.

    • View of workmen on a Colorado Gold Dredging Company hydraulic placer gold mining dredge near Russell (Costilla County) Veta Pass (La Veta Pass), Colorado. Shows men in suits near workmen, construction tools, barrels, railroad ties and planks.
    • Russell (Colo.)--1900-1910.; Dredges--American--Colorado--Russell--1900-1910.; Gold mining--Colorado--Russell--1900-1910.; Hydraulic mining--Colorado--Russell--1900-1910.
    • [between 1900 and 1910?]
    • Placer mining near Russel [sic], La Veta Pass

    • Men in suits, one woman and workmen stand on top of, in windows and beside a Colorado Gold Dredging Company hydraulic placer gold mining dredge near Russell (Costilla County), Veta Pass (La Veta Pass), Colorado. Shows an American flag on a flagpole.
    • Russell (Colo.)--1900-1910.; Dredges--American--Colorado--Russell--1900-1910.; Gold mining--Colorado--Russell--1900-1910.; Hydraulic mining--Colorado--Russell--1900-1910.
    • [between 1900 and 1910?]
    • So. Platte Dr. Co. gen. view

    • View of the South Platte Dredging Company hydraulic placer gold mining dredge probably near Fairplay (Park County), Colorado. Tailings piles are nearby.
    • South Platte Dredging Co.--Equipment & supplies--1930-1950.; Fairplay (Colo.)--1930-1950.; Dredges--Colorado--Fairplay--1930-1950.; Hydraulic mining--Colorado--Fairplay--1930-1950.; Mining--Colorado--Fairplay--1930-1950.
    • [between 1930 and 1950?]
    • So. Platte Dr. Co., rollers

    • View of roller mechanism on the South Platte Dredging Company hydraulic placer gold mining dredge near Fairplay (Park County), Colorado.
    • South Platte Dredging Co.--Equipment & supplies--1930-1950.; Mining machinery--Parts--Colorado--Fairplay--1930-1950.; Fairplay (Colo.)--1930-1950.; Dredges--Colorado--Fairplay--1930-1950.; Hydraulic mining--Colorado--Fairplay--1930-1950.;...
    • [between 1930 and 1950?]
    • Water supply ditch, So. Platte Dr. Co.

    • View of a ditch that leads to the South Platte Dredging Company hydraulic placer gold mining dredge near Fairplay (Parker County). Gravel tailing piles are nearby and mountains are in the distance. Shows part of the dredge.
    • South Platte Dredging Co.--Equipment & supplies--1930-1950.; Fairplay (Colo.)--1930-1950.; Dredges--Colorado--Fairplay--1930-1950.; Hydraulic mining--Colorado--Fairplay--1930-1950.; Mining--Colorado--Fairplay--1930-1950.; Tailings...
    • [between 1930 and 1950?]
    • So. Platte Dr. Co.

    • View of an extended arm and conveyor belt on the South Platte Dredging Company hydraulic placer gold mining dredge near Fairplay (Park County), Colorado. Gravel tailing piles are on the ground at the end of the mechanical arm.
    • South Platte Dredging Co.--Equipment & supplies--1930-1950.; Fairplay (Colo.)--1930-1950.; Conveying systems--Colorado--Fairplay--1930-1950.; Dredges--Colorado--Fairplay--1930-1950.; Hydraulic mining--Colorado--Fairplay--1930-1950.;...
    • [between 1930 and 1950?]
    • So. Platte Drg. Co.

    • View of equipment on the South Platte Dredging Company hydraulic placer gold mining dredge probably near Fairplay (Park County), Colorado. Shows chains, cables, and iron beams.
    • South Platte Dredging Co.--Equipment & supplies--1930-1950.; Mining machinery--Colorado--Fairplay--1930-1950.; Fairplay (Colo.)--1930-1950.; Dredges--Colorado--Fairplay--1930-1950.; Hydraulic mining--Colorado--Fairplay--1930-1950.;...
    • [between 1930 and 1950?]
    • So. Platte Drg. Co.

    • View of bucket mechanisms on the South Platte Dredging Company hydraulic placer gold mining dredge near Fairplay (Park County), Colorado. Shows iron beams, cables, and buckets.
    • South Platte Dredging Co.--Equipment & supplies--1930-1950.; Fairplay (Colo.)--1930-1950.; Dredges--Colorado--Fairplay--1930-1950.; Dredging--Colorado--Fairplay--1930-1950.; Hydraulic mining--Colorado--Fairplay--1930-1950.;...
    • [between 1930 and 1950?]
    • So. Platte Drg. Co.

    • Mechanized buckets scoop up soil on the South Platte Dredging Company hydraulic placer gold mining dredge near Fairplay (Park County), Colorado. Shows rock filled alluvial soil, cables, iron beams, and buckets.
    • South Platte Dredging Co.--Equipment & supplies--1930-1950.; Fairplay (Colo.)--1930-1950.; Dredges--Colorado--Fairplay--1930-1950.; Dredging--Colorado--Fairplay--1930-1950.; Hydraulic mining--Colorado--Fairplay--1930-1950.;...
    • [between 1930 and 1950?]
    • So. Platte Drg. Co.

    • View of a tall iron beam structure that is part of the South Platte Dredging Company hydraulic placer gold mining dredge near Fairplay (Park County), Colorado. Shows the iron beam framework, pulleys, and cables.
    • South Platte Dredging Co.--Equipment & supplies--1930-1950.; Fairplay (Colo.)--1930-1950.; Dredges--Colorado--Fairplay--1930-1950.; Hoisting machinery--Colorado--Fairplay--1930-1950.; Hydraulic mining--Colorado--Fairplay--1930-1950.;...
    • [between 1930 and 1950?]
    • So. Platte Drg. Co.

    • View of an iron framework of machinery on the South Platte Dredging Company hydraulic placer gold mining dredge near Fairplay (Park County), Colorado. Shows cables, pulleys, and buckets.
    • South Platte Dredging Co.--Equipment & supplies--1930-1950.; Fairplay (Colo.)--1930-1950.; Dredges--Colorado--Fairplay--1930-1950.; Hoisting machinery--Colorado--Fairplay--1930-1950.; Hydraulic mining--Colorado--Fairplay--1930-1950.;...
    • [between 1930 and 1950?]
    • So. Platte Drg. Co.

    • View of an iron framework on the South Platte Dredging Company hydraulic placer gold mining dredge near Fairplay (Park County), Colorado. Shows mechanized buckets transporting dirt, cables, iron beams, and the Platte River.
    • South Platte Dredging Co.--Equipment & supplies--1930-1950.; Fairplay (Colo.)--1930-1950.; Conveying systems--Colorado--Fairplay--1930-1950.; Dredges--Colorado--Fairplay--1930-1950.; Hydraulic mining--Colorado--Fairplay--1930-1950.;...
    • [between 1930 and 1950?]
    • So. Platte Drg. Co.

    • Buckets scoop soil from the Middle Fork South Platte River bed to be processed on the South Platte Dredging Company hydraulic placer gold mining dredge near Fairplay (Park County), Colorado. Shows iron beam framework, pulleys, and cables.
    • South Platte Dredging Co.--Equipment & supplies--1930-1950.; Fairplay (Colo.)--1930-1950.; Dredges--Colorado--Fairplay--1930-1950.; Dredging--Colorado--Fairplay--1930-1950.; Hydraulic mining--Colorado--Fairplay--1930-1950.;...
    • [between 1930 and 1950?]
    • So. Platte Drg. Co.

    • Mechanized buckets lift dirt onto the South Platte Dredging Company hydraulic placer gold mining dredge probably near Fairplay (Park County), Colorado. Shows steel beam framework and cables.
    • South Platte Dredging Co.--Equipment & supplies--1930-1950.; Fairplay (Colo.)--1940-1950.; Conveying systems--Colorado--Fairplay--1940-1950.; Dredges--Colorado--Fairplay--1940-1950.; Dredging--Colorado--Fairplay--1930-1950.;...
    • [between 1940 and 1950?]
    • So. Platte Drg. Co., control room

    • A worker operates the controls of the South Platte Dredging Company hydraulic placer gold mining dredge probably near Fairplay (Park County), Colorado. The man sits in the control room and holds a control lever in each hand. Other control levers...
    • South Platte Dredging Co.--Equipment & supplies--1930-1950.; Control rooms--Colorado--Fairplay--1930-1950.; Fairplay (Colo.)--1930-1950.; Dredges--Colorado--Fairplay--1930-1950.; Hydraulic mining--Colorado--Fairplay--1930-1950.;...
    • [between 1930 and 1950?]
    • So. Platte Drg. Co.

    • View of a control room with levers, switches, and dials on the South Platte Dredging Company hydraulic placer gold mining dredge probably near Fairplay (Park County), Colorado.
    • South Platte Dredging Co.--Equipment & supplies--1930-1950.; Control rooms--Colorado--Fairplay--1930-1950.; Fairplay (Colo.)--1930-1950.; Dredges--Colorado--Fairplay--1930-1950.; Hydraulic mining--Colorado--Fairplay--1930-1950.;...
    • [between 1930 and 1950?]
    • So. Platte Drg. Co.

    • View of the South Platte Dredging Company hydraulic placer gold mining dredge probably near Fairplay (Park County), Colorado. Shows dredge equipment, tailing piles, and hose.
    • South Platte Dredging Co.--Equipment & supplies--1930-1950.; Fairplay (Colo.)--1930-1950.; Dredges--Colorado--Fairplay--1930-1950.; Hydraulic mining--Colorado--Fairplay--1930-1950.; Mining--Colorado--Fairplay--1930-1950.
    • [between 1930 and 1950?]
    • Cooley Bros. Dredge, Gen. view

    • View of a dragline crane, a dredge and a shovel, possibly on Beaver Creek in Park County, Colorado. The crane reads: "Cooley Brothers" and "Bucyrus Monighan."
    • Park County (Colo.)--1930-1950.; Dredges--Colorado--Park County--1930-1950.; Gold dredging--Colorado--Park County--1930-1950.; Hoisting machinery--Colorado--Park County--1930-1950.; Hydraulic mining--Colorado--Park County--1930-1950.
    • [between 1935 and 1945?]
    • Cooley Bros. Dredge, Gen. view

    • View of a dragline crane, a dredge, gabled buildings and mountains on probably Beaver Creek in Park County, Colorado.
    • Park County (Colo.)--1930-1950.; Dredges--Colorado--Park County--1930-1950.; Gold dredging--Colorado--Park County--1930-1950.; Hoisting machinery--Colorado--Park County--1930-1950.; Hydraulic mining--Colorado--Park County--1930-1950.
    • [between 1935 and 1950?]
    • Construction scene

    • Workmen stand by horse-drawn dredges near the edge of Archer Canal in Denver, Colorado. Charles S. Lillybridge's house and studio is in the distance.
    • Lillybridge, Charles S., 1849-1935.--Homes & haunts--1900-1910.; Denver (Colo.)--1900-1910.; Dredges--Colorado--Denver--1900-1910.; Horses--Colorado--Denver--1900-1910.; Laborers--Colorado--Denver--1900-1910.; Photographic...
    • [between 1904 and 1915]
    • Derry gold dredge by Twin Peaks

    • Workmen stand on and near the Derry Dredge, Empire Gold Dredging Company's hydraulic placer bucket-line vessel, near Leadville (Lake County), Colorado.
    • Empire Gold Dredging Company--Equipment & supplies--1910-1930.; Lake County (Colo.)--1910-1930.; Dredges--American--Colorado--Lake County--1910-1930.; Gold mining--Colorado--Lake County--1910-1930.; Hydraulic mining--Colorado--Lake...
    • [between 1915 and 1926]
    • 8 yard shovel Timberline Dredging operation Alma, Colo.

    • View of a steamshovel at the Timberline Dredging Company Mine near Alma (Park County), Colorado. The side of the machinery reads: "No 2" and "Page".
    • Dredges--Colorado--Alma--1940-1950.; Mining machinery--Colorado--Alma--1940-1950.; Alma (Colo.)--1940-1950.; Hydraulic mining--Colorado--Alma--1940-1950.; Mining--Colorado--Alma--1940-1950.
    • [1940]
    • Timberline Dredge Alma, Colo.

    • View of the Timberline Dredge on the South Platte River near Alma (Park County), Colorado. The covered digging arm extends out over the water.
    • Dredges--Colorado--Alma--1940-1950.; Mining machinery--Colorado--Alma--1940-1950.; Alma (Colo.)--1940-1950.; South Platte River (Colo. and Neb.)--1940-1950.; Hydraulic mining--Colorado--Alma--1940-1950.; Mining--Colorado--Alma--1940-1950.
    • [1940]
    • Timberline Dredging operation Alma, Colo.

    • View of a crane and the Timberline Dredge on the South Platte River near Alma (Park County), Colorado. The covered digging arm extends out over the water. A sign on the dredge reads: "Timberline Dredging Co. Dredge No 2 [...]".
    • Dredges--Colorado--Alma--1940-1950.; Mining machinery--Colorado--Alma--1940-1950.; Alma (Colo.)--1940-1950.; Hoisting machinery--Colorado--Alma--1940-1950.; Hydraulic mining--Colorado--Alma--1940-1950.; Mining--Colorado--Alma--1940-1950.
    • [1940]
    • Old gold dredge near Tiger, Colo.

    • View of an abandoned gold dredge on probably the Swan River near Tiger (Summit County), Colorado. Tailings piles are nearby.
    • Dredges--Colorado--Tiger--1940-1950.; Mining machinery--Colorado--Tiger--1940-1950.; Tiger (Colo.)--1940-1950.; Hydraulic mining--Colorado--Tiger--1940-1950.; Mining--Colorado--Tiger--1940-1950.
    • 1940
    • South Platte Dredge Fairplay, Colo.

    • View of the South Platte Dredge near Fairplay (Park County), Colorado. Tailings piles are nearby.
    • Dredges--Colorado--Fairplay--1940-1950.; Mining machinery--Colorado--Fairplay--1940-1950.; Fairplay (Colo.--1940-1950.; Hydraulic mining--Colorado--Fairplay--1940-1950.; Mining--Colorado--Fairplay--1940-1950.
    • [1940]
    • Placer mining near Russell, La Veta pass

    • Hydraulic placer gold mining dredge near Russell, La Veta Pass, Costilla County, Colorado.
    • Dredges--Colorado--Costilla County--1900-1910.; Gold dredging--Colorado--Costilla County--1900-1910.; Costilla County (Colo.)--1900-1910.; Veta Pass (Colo.)--1900-1910.; Hydraulic mining--Colorado--Costilla County--1900-1910.;...
    • [1900?]
    • Gold dredging

    • Hydraulic placer gold mining dredge, possibly in Summit County, Colorado. Shows conveyor buckets on front of dredge used to dig gravel.
    • Dredges--Colorado--1900-1910.; Gold dredging--Colorado--1900-1910.; Conveying systems--Colorado--1900-1910.; Hydraulic mining--Colorado--1900-1910.; Mining--Colorado--1900-1910.
    • [1900?]
    • 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?]
    • Fairplay, Colorado dredge

    • Distant view of a gold mining dredge and tailings, Fairplay, Park County, Colorado with Mosquito Range in background.
    • Dredges--Colorado--Fairplay--1950-1960.; Gold dredging--Colorado--Fairplay--1950-1960.; Fairplay (Colo.)--1950-1960.; Hydraulic mining--Colorado--Fairplay--1950-1960.; Mining--Colorado--Fairplay--1950-1960.
    • September 1953
    • Gold dredge in Summit County, Colorado

    • View of a Blue River Placer Mining Company hydraulic placer bucket-line dredge, in the Blue River, Summit County, Colorado. The gold mining vessel and processing plant has a covered stacker extending over tailing piles; mountains are in the...
    • Blue River Placer Mining Company--1920-1930.; Dredges--Colorado--Summit County--1920-1930.; Mining machinery--Colorado--Summit County--1920-1930.; Tailings embankments--Colorado--Summit County--1920-1930.; Blue River (Colo. : River)--1920-1930.;...
    • [between 1920 and 1925?]
    • First dredge in Idaho City

    • Miners pose on a hydraulic placer gold bucket-line dredge, in Idaho City, Boise County, Idaho; a United States flag tops the gantry, over pulleys.
    • Dredges--Idaho--Idaho City--1900-1920.; Mining machinery--Idaho--Idaho City--1900-1920.; Idaho City (Idaho)--1900-1920.; Gold mining--Idaho--Idaho City--1900-1920.; Hydraulic mining--Idaho--Idaho City--1900-1920.; Miners--Idaho--Idaho...
    • [between 1900 and 1920?]
    • Alma Gold Mining Co.

    • Alma Gold Mining Company hydraulic placer dredge, Park County, Colorado shows tailings, settling pond and backhoe with Mosquito Range in background.
    • Alma Gold Mining Company (Colo.)--1930-1940.; Dredges--Colorado--Park County--1930-1940.; Gold dredging--Colorado--Park County--1930-1940.; Park County (Colo.)--1930-1940.; Hydraulic mining--Colorado--Park County--1930-1940.; Mining--Colorado--Park...
    • February 24, 1936
    • Breckenridge, Colo Reliance Gold Dredge

    • View of a Reliance Gold Dredging Company Bucyrus-built hydraulic placer gold bucket-line dredge in Swan River, French Gulch, Summit County, Colorado. Colorado School of Mines students and miners pose on the vessel.
    • Reliance Gold Dredging Company--1900-1910.; Dredges--Colorado--Summit County--1900-1910.; Mining machinery--Colorado--Summit County--1900-1910.; French Gulch (Summit County, Colo.)--1900-1910.; Summit County (Colo.)--1900-1910.; Swan River...
    • 1906?
    • Gold dredge, Breckenridge, Colo

    • View of the Blue River Placer Mining Company (or Continental Mining Company) bucket-line dredging boat, in Breckenridge, Summit County, Colorado. The covered stacker of the hydraulic mine and processing plant extends over tailing piles; a person is...
    • Dredges--Colorado--Breckenridge--1910-1940.; Mining machinery--Colorado--Breckenridge--1910-1940.; Breckenridge (Colo.)--1910-1940.; Gold mining--Colorado--Breckenridge--1910-1940.; Hydraulic mining--Colorado--Breckenridge--1910-1940.;...
    • [between 1917 and 1938?]
    • Dredge

    • View of the Reliance Gold Dredging Company's bucket-line hydraulic placer gold mining boat, in Summit County, Colorado. Miners pose on the gantry, decks, and elevator.
    • Dredges--Colorado--Summit County--1900-1920.; Mining machinery--Colorado--Summit County--1900-1920.; Summit County (Colo.)--1900-1920.; Gold mining--Colorado--Summit County--1900-1920.; Hydraulic mining--Colorado--Summit County--1900-1920.;...
    • [between 1909 and 1913?]
    • North A. M. Gold Dredging Co

    • View of North American Gold Dredging Company placer mining operations in Summit County, Colorado; shows a hydraulic elevator and pond. Men take samples with a churn drill; lettering reads: "Keystone Driller Co."
    • Dredges--Colorado--Summit County--1890-1910.; Mining machinery--Colorado--Summit County--1890-1910.; Summit County (Colo.)--1890-1910.; Gold mining--Colorado--Summit County--1890-1910.; Hydraulic mining--Colorado--Summit County--1890-1910.;...
    • [between 1898 and 1902?]
    • Reliance Dredge, French Gulch

    • View of Revett's Reliance Gold Mining Company Bucyrus-built hydraulic bucket-line dredging boat, in Breckenridge, Summit County, Colorado. Miners pose on the decks and by the placer processing plant; snow covers mountains in the background.
    • Dredges--Colorado--Breckenridge--1900-1920.; Mining machinery--Colorado--Breckenridge--1900-1920.; Breckenridge (Colo.)--1900-1920.; French Gulch (Summit County, Colo.)--1900-1920.; Hydraulic mining--Colorado--Breckenridge--1900-1920.;...
    • [between 1905 and 1913?]
    • Dredges in Swan River Valley capacity of 8000 yds of gold bearing gravel daily

    • Hydraulic placer gold dredge, in Summit County, Colorado; shows the gantry, tail sluices, processing sheds, and the stacker extending over mine tailing piles. Hills are in the background.
    • Dredges--Colorado--Summit County--1890-1910.; Mining machinery--Colorado--Summit County--1890-1910.; Summit County (Colo.)--1890-1910.; Gold mining--Colorado--Summit County--1890-1910.; Hydraulic mining--Colorado--Summit County--1890-1910.;...
    • [between 1890 and 1910?]
    • Two nine and one-half cubic foot placer dredges, the Colorado Gold Dredging Co.

    • View of Colorado Gold Dredging Company Bucyrus-built bucket-line hydraulic mine and processing boats, in the Swan River at Valdora, Summit County, Colorado. Tailings are piled between them; buildings are in the background.
    • Dredges--Colorado--Valdora--1900-1910.; Mining machinery--Colorado--Valdora--1900-1910.; Tailings embankments--Colorado--Valdora--1900-1910.; Swan River (Colo.)--1900-1910.; Valdora (Colo.)--1900-1910.; Gold mining--Colorado--Valdora--1900-1910.;...
    • 1908
    • Hydraulic dredges

    • Two hydraulic placer gold mining dredges (probably the Eleanor Dredges, east of Golden), Colorado. A solitary man poses nearby.
    • Dredges--Colorado--1900-1910.; Gold mining--Colorado--1900-1910.; Hydraulic mining--Colorado--1900-1910.; Mining--Colorado--1900-1910.
    • [1900?]
    • Boiler for the first dredge that went into Warren, Idaho

    • Men pose around a wagon carrying a boiler tank in Warren, Idaho County, Idaho. They wear suits, and slouch or planter hats. A team of eight horses in harness pull the conveyance.
    • Warren (Idaho)--1880-1890.; Dredges--Idaho--Warren--1880-1890.
    • [between 1880 and 1890?]
    • Taylor Park Dredge, working on Texas Creek - Gunnison County

    • View of a hydraulic placer bucket-line gold mining dredge on Texas Creek, in Gunnison County, Colorado.
    • Gunnison County (Colo.)--1910-1920.; Texas Creek (Gunnison County, Colo.)--1910-1920.; Dredges--Colorado--Gunnison County--1910-1920.; Gold mining--Colorado--Gunnison County--1910-1920.; Hydraulic mining--Colorado--Gunnison County--1910-1920.;...
    • [between 1910 and 1915]
    • Junction of Gray Back Placer & Middle Creek Placer Colo.

    • View of the Grayback Mining District, Costilla County, Colorado; shows meadows, forest, and hills. A covered wagon and a man on horseback are by the creek bottom; embankments in the background have erosion from hydraulic gold dredges.
    • Costilla County (Colo.)--1900-1910.; Covered wagons--Colorado--Costilla County--1900-1910.; Horseback riding--Colorado--Costilla County--1900-1910.; Hydraulic mining--Colorado--Costilla County--1900-1910.; Mining--Colorado--Costilla...
    • [between 1900 and 1910?]
    • 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?]
    • Dredging gold, Fairplay, Colo.

    • Hydraulic placer gold mining dredge, Fairplay, Park County, Colorado.
    • Dredges--Colorado--Fairplay--1900-1910.; Gold dredging--Colorado--Fairplay--1900-1910.; Fairplay (Colo.)--1900-1910.; Hydraulic mining--Colorado--Fairplay--1900-1910.; Mining--Colorado--Fairplay--1900-1910.
    • [1900?]
    • South Platte dredge, Fairplay, Colo.

    • Hydraulic placer gold mining dredge on the South Platte River, Fairplay, Park County, Colorado.
    • Dredges--Colorado--Fairplay--1930-1940.; Gold dredging--Colorado--Fairplay--1930-1940.; Fairplay (Colo.)--1930-1940.; Hydraulic mining--Colorado--Fairplay--1930-1940.; Mining--Colorado--Fairplay--1930-1940.
    • [1930?]
    • Gold dredge, Fairplay

    • A conveyor belt moves buckets of rocks on a hydraulic placer gold mining dredge, Fairplay, Park County, Colorado.
    • Dredges--Colorado--Fairplay--1940-1950.; Gold dredging--Colorado--Fairplay--1940-1950.; Fairplay (Colo.)--1940-1950.; Conveying systems--Colorado--Fairplay--1940-1950.; Hydraulic mining--Colorado--Fairplay--1940-1950.;...
    • 1942

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