Spokane, Portland and Seattle Railway Engineering Drawing: Proposed Changes, Bridge 291.4 - Oregon - Washington Railroad and Navigation Company Crossing, Washtucna, Washington, Line Segment 047, Milepost 291.4. Sheet 00 - 607, 1930.

Spokane, Portland and Seattle Railway Engineering Drawing: Proposed Change, Bridge 66.4 - Little White Salmon River, east of Cooks, Washington, Line Segment 047, Milepost 66.32. Sheet H - 3 - 1, 1913.

Spokane, Portland and Seattle Railway Engineering Drawing: Proposed Change, Bridge 24.8 - Washougal River (West End), Camas, Washington, Line Segment 047, Milepost 24.75. Sheet AA - 418, 1911.

Spokane, Portland and Seattle Railway Engineering Drawing: Proposed Bridge, Bridge T149.6 - Underpass, Bend, Oregon, Line Segment 053, Milepost 149.60. Sheet NN - 267, undated.

Spokane, Portland and Seattle Railway Engineering Drawing: Proposed Bridge, Bridge S15.1 Canal, west of Lebanon, Oregon, Line Segment 457, Milepost 15.06. Sheet SS - 429, 1930. Note: Pile trestle

Spokane, Portland and Seattle Railway Engineering Drawing: Proposed Bridge, Bridge 44.3 - Woodard Creek, east of Skamania, Washington, Line Segment 047, Milepost 44.30. Sheet N - 1 - 11, 1909.

Spokane, Portland and Seattle Railway Engineering Drawing: Proposed Bridge, Bridge 24.8 - Washougal River (West End), Washington, Line Segment 047, Milepost 28.78. Sheet 444 - 31, 1906.

Spokane, Portland and Seattle Railway Engineering Drawing: Proposed Alterations, Bridge T151.0 - Greenwood Ave, Bend, Oregon, Line Segment 053, Milepost 151.03. Sheet NO - 328B, undated.

Spokane, Portland and Seattle Railway Engineering Drawing: Proposed Abutments, Bridge 31.3 - Hathaway Creek, east of Washougal, Washington, Line Segment 047, Milepost 31.32. Sheet N - 1 - 7, 1908.

Spokane, Portland and Seattle Railway Engineering Drawing: Project Map and Index, Bridge 47.5 - Access Road, east of Skamania, Washington, Line Segment 047, Milepost 47.46. Sheet 315 - 6991 - 8, undated.