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  • All fields: Clear Creek (Clear Creek County, Colo.)--1970-1980.
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    • Eisenhower Tunnel

    • View of scaffolding and concrete forms during construction of the Eisenhower Memorial tunnel in either Clear Creek or Summit County, Colorado. Snow and mud dot building materials under an open section of the roof; men work at the side.
    • Eisenhower Memorial Tunnel (Colo.)--1970-1980.; Clear Creek (Clear Creek County, Colo.)--1970-1980.; Summit County (Colo.)--1970-1980.; Road construction--Colorado--1970-1980.; Tunnels--Colorado--1970-1980.
    •  
    • Dr. Larry Brown, kneeling, explains the growth processes of experimental grass seed mixture at the...

    • Dr. Larry Brown demonstrates to his co-workers the growth processes of an experimental mixture of grass seed using crushed rock, wood chips, and dried sludge during the reclamation of the Urad mine site, Clear Creek County, Colorado.
    • Henderson Mine (Clear Creek County, Colo.)--People--1970-1980.; Clear Creek (Clear Creek County, Colo.)--1970-1980.; Mining--Colorado--Clear Creek County--1970-1980.; Reclamation of land--Colorado--Clear Creek County--1970-1980.; Brown, Larry.
    • [between 1975 and 1980]

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