This antique real photo postcard features the interior of the power house at the Colliers Dam No. 86 hydroelectric power plant near Oneonta, New York. The photo depicts several rugged men who worked at the dam, and was taken Nov. 30 , 1907. The dam was built in the same year at a cost of $200,000 and supplied power to the Otseco-Mohawk trolley line and nearby villages after flooding over 600 acres.

The postcard is an original and has not been postmarked. It is a single unit and falls under the category of non-topographical postcards. The theme of the postcard is the history of the dam, rather than its condition. The features of the postcard include its age and era, as well as the subject matter. The country of manufacture is the United States.

A very rare image of the industrial interior of the Power house Colliers Dam No. 86 .