Filters: Date Range: {"choice":"year"} (X) > Tags: {"scheme":"http://www.sciencebase.gov/vocab/undefined/DenverHistoryPhotoLibrary/Collections"} (X) > Categories: Image (X) > partyWithName: Hess, Frank Lee (X)

Filters Date Types (for Date Range) Contacts U.S. Geological Survey Tag Types collection (2) Tags (with Scheme=http://www.sciencebase.gov/vocab/undefined/DenverHistoryPhotoLibrary/Collections) black metal reduction company mill (1) primos exploration company (1) View Results as: JSON ATOM CSV

Open cut on the "Copeland property" of the Primos Exploration Company. Boulder County, Colorado. 1917. South Boulder Creek, 1 1/2 miles north of Boulder looking south. Categories: Image; Tags: Boulder County, Colorado, Hess, F.L. Collection, Mills, Mines, Quarries, Photographers, Primos Exploration Company, All tags... photo print, Fewer tags Black Metal Reduction Company's Tungsten mill at the mouth of Boulder Canyon. Boulder County, Colorado. 1917. Black Metal Reduction Company's Tungsten mill at the mouth of Boulder Canyon. Boulder County, Colorado. March 9, 1917. Categories: Image; Tags: Black Metal Reduction Company Mill, Boulder County, Colorado, Hess, F.L. Collection, Mills, Mines, Quarries, Photographers, All tags... photo print, Fewer tags