Stereograph dry plate glass negative depicting a crane at the construction site for the east portal of the Moffat Tunnel in Gilpin County, Colorado during winter, circa 1922-1923. The photo was taken by either Herman Frederick Hall (1893-1984) or his one of his brothers, Herbert Harold Hall (1893-1961) or Edmeaux Homer Hall (b. 1897). The Hall family was a mixed-race family of African-American descent who lived at 2350 Glenarm Place in Denver.