Great Northern Railway Historical Society Blueprint Collection JSBP4757, Sieben, Montana, undated. Great Northern Blueprint Number 174-1570-11-B, Bridge Number 40. Plan and Elevation. Interstate Commerce Commission Account Number 6, Bridges, Trestles, and Culverts. Other ICC account descriptions: ICC Account Number 6, Bridge.
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Taken From: "GN Locations" database compiled by Jim Chinquist, year 1950.