Oregon Slough Branch of Columbia River, Oregon

Thursday, February 1, 1912

Tuesday, March 31, 1914

A2009-018

M/1786

Blueprint map of Columbia Slough, showing soundings. Center of the map is at the Spokane, Portland, and Seattle Railroad (S.P.&S.) crossing and the Portland Union Stock Yards. "Oregon Slough Branch of Columbia River, Oregon Surveyed February 1912 Under the Direction of Major Jay J. Morrow, Corps of Engineers, U.S.A. J.S. Polhemus, Ass't Engineer Scale 1:5000 Channel dredged Dec. 1913 - Mar. 1914" Also visible are Hayden Island, Electric Railroad Trestle, Portland Railway Lighting and Power Company Electric Railroad Trestle, Monarch Lumber Company, and Multnomah Trunk and Bag Company. Tear is right side of map.

Public Works Administration (Archival) - Public Works Administrator - Maps & Plans