A group of people walk on the narrow gauge railroad tracks between the Mary Verna mine and the power plant on Tenmile Creek in Summit County, Colorado.
Mine buildings--Colorado--Summit County--1900-1910.; Mary Verna Tunnel Mine (Summit County, Colo.)--1900-1910.; Summit County (Colo.)--1900-1910.; Tenmile Creek (Summit County, Colo.)--1900-1910.; Mining--Colorado--Summit County--1900-1910.; Narrow...
between 1906 and 1909
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