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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.

Spokane, Portland and Seattle Railway Engineering Drawing: Progress Profile, Bridge T74.6 - Deschutes River, south of Dixon, Oregon, Line Segment 053, Milepost 74.65. Sheet RR - 544, undated.

Spokane, Portland and Seattle Railway Engineering Drawing: Progress Profile, Bridge T67.0 - Eagle Creek, Dant, Oregon, Line Segment 053, Milepost 67.00. Sheet RR - 542, undated.

Spokane, Portland and Seattle Railway Engineering Drawing: Progress Profile, Bridge T60.6 - Nena Creek, south of Cambrai, Oregon, Line Segment 053, Milepost 60.54. Sheet RR - 540, undated.

Spokane, Portland and Seattle Railway Engineering Drawing: Progress Profile, Bridge T57.5 - Waupanita Creek, south of Cambrai, Oregon, Line Segment 053, Milepost 57.47. Sheet RR - 538, undated.

Spokane, Portland and Seattle Railway Engineering Drawing: Progress Profile, Bridge T43.7 - Deschutes River, south of Oakbrook, Oregon, Line Segment 053, Milepost 43.65. Sheet RR - 533, undated.