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Spokane, Portland and Seattle Railway Engineering Drawing: Proposed Expansion Bolts, Bridge 265.8 - Burr Canyon, north of Burr, Washington, Line Segment 047, Milepost 265.8. Sheet 270 - 0, undated.

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

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