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Photograph

Northern Pacific railroad bridge, circa 1910

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In about 1910, the Northern Pacific Railroad built a bascule bridge in one of its railroad trestles. In this kind of bridge, a large weight is used as a counterbalance. When the weight is pulled downwards, the span of the bridge tilts upwards so that boats can pass underneath.

In this photo, scaffolding supports the large weight while the railroad bridge is being built.

Photographer's Reference Number: 883
ID Number: 1983.10.6724
Date: Circa 1910
Creator(s): Webster & Stevens, Photographer
Physical Description: 1 negative : glass, b&w ; 8 x 10 in.
Credit: MOHAI, PEMCO Webster & Stevens Collection, 1983.10.6724
Copyright: No Known Copyright