The primary objective of this index is to contain a comprehensive listing of place names or sites in Colorado that would direct the researcher
to recent and readily available publications. Included in this publication for each site or place name,...
Index originally created by Henrietta Bromwell in 1933 of 31,000 items regarding biographies and portraits of politicians, miners, club women, newspaper editors, artists, businessmen, legislators, early settlers, settlements, mines, geographical...
View of a placer mine by a river; miners pose by a rocker and sluice, climbing a pole, and in an ore car. A furnace and barrels are by pipes and a ditch; frame buildings, automobiles, and a freight car with letters: "C N N" [?] are in the...
View of a wooden flume at probably a placer mine on Chicago Creek near Idaho Springs in Clear Creek County, Colorado. Shows a timber foot bridge over the creek, log cabins and tailings piles.
Chicago Creek (Colo.)--1860-1870.; Clear Creek County (Colo.)--1860-1870.; Flumes--Colorado--Clear Creek County--1860-1870.; Hydraulic mining--Colorado--Clear Creek County--1860-1870.; Streams--Colorado--Clear Creek County--1860-1870.
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.
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.
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.
View of the Golconda Group Mine near Summitville in Rio Grand County, Colorado. A sluice box sits in an excavated trench. Men work near the trench. Mount Hesperus (Hesperus Mountain) is in the distance.
Golconda Group Mine (Rio Grande County, Colo.)--1890-1900.; Hesperus Mountain (Colo.)--1890-1900.; Summitville (Colo.)--1890-1900.; Hydraulic mining--Colorado--Summitville--1890-1900.; Mining--Colorado--Summitville--1890-1900.;...
View of the Golconda Group Mine in Summitville, Rio Grande County, Colorado. Shows wood plank building, log cabin, and tent. A sluice box sits in an excavated trench. Men are in the distance.
Golconda Group Mine (Rio Grande County, Colo.)--1890-1900.; Summitville (Colo.)--1890-1900.; Hydraulic mining--Colorado--Summitville--1890-1900.; Mining--Colorado--Summitville--1890-1900.; Sluices--Colorado--Summitville--1890-1900.
View of the Keystone Placer Mine in San Miguel County Colorado. Shows mining buildings and sluice apparatus.
Keystone Mine (San Miguel County, Colo.)--1880-1900.; San Miguel County (Colo.)--1880-1900.; Flumes--Colorado--San Miguel County--1880-1900.; Hydraulic mining--Colorado--San Miguel County--1880-1900.; Mine buildings--Colorado--San Miguel...
View of mining operations at the Keystone Mine in San Miguel County, Colorado. Shows sluice boxes and a large pipe with hydraulic nozzles.
Keystone Mine (San Miguel County, Colo.)--1880-1900.; San Miguel County (Colo.)--1880-1900.; Flumes--Colorado--San Miguel County--1880-1900.; Hydraulic mining--Colorado--San Miguel County--1880-1900.; Mining--Colorado--San Miguel County--1880-1900.
View of mining operations along the San Miguel River in San Miguel County, Colorado. Plumes of water emerge from pipes with hydraulic nozzles (monitors).
San Miguel County (Colo.)--1880-1900.; San Miguel River (Colo.)--1880-1900.; Hydraulic mining--Colorado--San Miguel County--1880-1900.; Mining--Colorado--San Miguel County--1880-1900.; Rivers--Colorado--San Miguel County--1880-1900.
A man loads rubble onto an ore car in a tunnel at the West Portal of the Alva B. Adams Tunnel (Continental Divide Tunnel) of the Colorado Big Thompson project in Grand County, Colorado.
Alva B. Adams Tunnel (Colo.)--1940-1950.; Grand County (Colo.)--1940-1950.; Hydraulic facilities--Colorado--Grand County--1940-1950.; Interiors--Colorado--Grand County--1940-1950.; Laborers--Colorado--Grand County--1940-1950.;...
Men load rubble onto ore cars in a tunnel at the West Portal of the Alva B. Adams Tunnel (Continental Divide Tunnel) of the Colorado Big Thompson project in Grand County, Colorado.
Alva B. Adams Tunnel (Colo.)--1940-1950.; Grand County (Colo.)--1940-1950.; Hydraulic facilities--Colorado--Grand County--1940-1950.; Interiors--Colorado--Grand County--1940-1950.; Laborers--Colorado--Grand County--1940-1950.;...
Men work in a tunnel at the West Portal of the Alva B. Adams Tunnel (Continental Divide Tunnel) of the Colorado Big Thompson project in Grand County, Colorado.
Alva B. Adams Tunnel (Colo.)--1940-1950.; Grand County (Colo.)--1940-1950.; Hydraulic facilities--Colorado--Grand County--1940-1950.; Interiors--Colorado--Grand County--1940-1950.; Laborers--Colorado--Grand County--1940-1950.;...
Men load rubble in a tunnel at the West Portal of the Alva B. Adams Tunnel (Continental Divide Tunnel) of the Colorado Big Thompson project in Grand County, Colorado. One man smokes a cigarette.
Alva B. Adams Tunnel (Colo.)--1940-1950.; Grand County (Colo.)--1940-1950.; Hydraulic facilities--Colorado--Grand County--1940-1950.; Interiors--Colorado--Grand County--1940-1950.; Laborers--Colorado--Grand County--1940-1950.;...
View of construction at the East Portal of the Alva B. Adams Tunnel (Continental Divide Tunnel) of the Colorado Big Thompson project in Larimer County, Colorado.; shows tracks, sheds, pipes, pipe sections, tailings, rocky crags, cirrus and cumulus...
Alva B. Adams Tunnel (Colo.)--1940-1950.; Larimer County (Colo.)--1940-1950.; Construction--Colorado--Larimer County--1940-1950.; Hydraulic facilities--Colorado--Larimer County--1940-1950.
Men stand by a muck train that emerges from the West Portal of the Alva B. Adams Tunnel (Continental Divide Tunnel) of the Colorado Big Thompson project in Grand County, Colorado. Sign reads: "Positively No Admittance."
Alva B. Adams Tunnel (Colo.)--1940-1950.; Grand County (Colo.)--1940-1950.; Cable railroads--Colorado--Grand County--1940-1950.; Construction workers--Colorado--Grand County--1940-1950.; Construction--Colorado--Grand County--1940-1950.; Hydraulic...
Men pose by cable driven cars inside the West Portal of the Alva B. Adams Tunnel (Continental Divide Tunnel) of the Colorado Big Thompson project in Grand County, Colorado.
Colorado-Big Thompson Project (U.S.)--People--1940-1950.; Alva B. Adams Tunnel (Colo.)--1940-1950.; Grand County (Colo.)--1940-1950.; Cable railroads--Colorado--Grand County--1940-1950.; Construction workers--Colorado--Grand County--1940-1950.;...
Men examine metal shoring near the West Portal of the Alva B. Adams Tunnel (Continental Divide Tunnel) of the Colorado Big Thompson project in Grand County, Colorado
Alva B. Adams Tunnel (Colo.)--1940-1950.; Grand County (Colo.)--1940-1950.; Construction workers--Colorado--Grand County--1940-1950.; Hydraulic facilities--Colorado--Grand County--1940-1950.; Interiors--Colorado--Grand County--1940-1950.;...
Men load rubble onto ore cars in a tunnel at the West Portal of the Alva B. Adams Tunnel (Continental Divide Tunnel) of the Colorado Big Thompson project in Grand County, Colorado. The men wear work overalls, hard hats, and electric mine lamps....
Colorado-Big Thompson Project (U.S.)--People--1930-1950.; Alva B. Adams Tunnel (Colo.)--1940-1950.; Grand County (Colo.)--1940-1950.; Employees--Colorado--Grand County--1940-1950.; Hydraulic facilities--Colorado--Grand County--1940-1950.; Mine...
View of the South Platte Dredging Company hydraulic placer gold mining dredge probably near Fairplay (Park County), Colorado. Tailings piles are nearby.
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.
Water flows from pipes into long sluice boxes on the South Platte Dredging Company hydraulic placer gold mining dredge probably near Fairplay (Park County), Colorado.
View of iron beams, cables, and pulleys on the South Platte Dredging Company hydraulic placer gold mining dredge near Fairplay (Park County), Colorado.
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.
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.
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.