Spokane, Portland and Seattle Railway Engineering Drawing: Proposed Channel Change, Bridge T57.5 - Waupanita Creek, south of Cambrai, Oregon, Line Segment 053, Milepost 57.47. Sheet 0 - 3 - 2, undated.
Spokane, Portland and Seattle Railway Engineering Drawing: Proposed Changes, Bridge E98.6 - Calapooia River, south of Albany, Oregon, Line Segment 442, Milepost 98.44. Sheet Y - 6 - 9, undated.
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.