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Spokane, Portland and Seattle Railway Engineering Drawing: General Plan, Bridge E35.3 - Tualatin River, south of Tigard, Oregon, Line Segment 442, Milepost 35.21. Sheet WX - 144, 1918.

Spokane, Portland and Seattle Railway Engineering Drawing: General Plan, Bridge E22.1 - Underpass - Detail, south of Bowers Junction, Oregon, Line Segment 442, Milepost 22.09. Sheet WX - 170 - B, undated.

Spokane, Portland and Seattle Railway Engineering Drawing: General Plan, Bridge E20.1 - Highway 26, south of Bowers Junction, Oregon, Line Segment 442, Milepost 22.09. Sheet WX - 170 - A, undated.

Spokane, Portland and Seattle Railway Engineering Drawing: General Plan, Bridge A86.6 - Overpass, Knappa, Oregon, Line Segment 440, Milepost 84.71. Sheet TV - 426, 1961. Note: Frame trestle

Spokane, Portland and Seattle Railway Engineering Drawing: General Plan, Bridge A62.7 - Clatskanie River, west of Clatskanie, Oregon, Line Segment 440, Milepost 62.67, undated.

Spokane, Portland and Seattle Railway Engineering Drawing: General Plan, Bridge A34.4 - Merrill Creek, west of Reichhold, Oregon, Line Segment 440, Milepost 34.36, undated.

Spokane, Portland and Seattle Railway Engineering Drawing: General Plan, Bridge 9.6 - Columbia River, Vancouver, Washington, Line Segment 047, Milepost 9.31. Sheet Z - 2 - 14 - 5, undated.