File:Photocopy of original construction drawing, dated 23 April 1940 (Original print in the possession of U.S. Army Corps of Engineers, Portland District, Portland, OR.) (P-40-12) HAER ORE,26-BONV,2-E-136.tif
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![File:Photocopy of original construction drawing, dated 23 April 1940 (Original print in the possession of U.S. Army Corps of Engineers, Portland District, Portland, OR.) (P-40-12) HAER ORE,26-BONV,2-E-136.tif](https://upload.wikimedia.org/wikipedia/commons/thumb/3/3f/Photocopy_of_original_construction_drawing%2C_dated_23_April_1940_%28Original_print_in_the_possession_of_U.S._Army_Corps_of_Engineers%2C_Portland_District%2C_Portland%2C_OR.%29_%28P-40-12%29_HAER_ORE%2C26-BONV%2C2-E-136.tif/lossy-page1-774px-thumbnail.tif.jpg?20140802050333)
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