Great Northern Railway Historical Society Blueprint Collection JSBP1148, Dedham, Minnesota, 1914. Great Northern Blueprint Number 205-2576-2, Bridge 20.0. 1.5 Miles West of Dedham, General Plan and Masonry, Also Known As Br. 30. Authorization for Expenditure 24066. Interstate Commerce Commission Account Number 6, Bridges, Trestles, and Culverts. Other ICC account descriptions: ICC Account Number 6, Bridges and Trestles.