View of an unidentified mine in Boulder County, Colorado. Men work near piles of lumber and on a retaining wall. Shows stone retaining walls, a log retaining wall, piles of sand, a long log building with a ventilator on the roof and a stove pipe,...
Boulder County (Colo.)--1890-1900.; Construction.; Houses.; Log buildings.; MIning.; Retaining walls.
1895 July 25
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