Great Northern Railway Historical Society Blueprint Collection JSBP2130, Grotto, Washington, 1915. 6' X 6' Reinforced Concrete Culvert. Plan and Elevation With Dimensions. Authorization for Expenditure 25613. Interstate Commerce Commission Account Number 6, Bridges, Trestles, and Culverts. Other ICC account descriptions: ICC Account Number 6, Culvert.
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Taken From: "GN Locations" database compiled by Jim Chinquist, year 1950.