Spokane, Portland and Seattle Railway Engineering Drawing: Proposed Permanent Bridge, Bridge T151.0 - Greenwood Ave, Bend, Oregon, Line Segment 053, Milepost 151.03, undated.

Spokane, Portland and Seattle Railway Engineering Drawing: Proposed Grillage, Bridge A29.4S, west of Saint Helens, Oregon, Line Segment 440, Milepost 0.40. Sheet NO - 240, 1932.

Spokane, Portland and Seattle Railway Engineering Drawing: Proposed Grillage, Bridge A29.4S, west of Saint Helens, Oregon, Line Segment 440, Milepost 0.40. Sheet NO - 241, 1932.

Spokane, Portland and Seattle Railway Engineering Drawing: Proposed Extension, Bridge 10.4 - 5,6,7th Streets, Vancouver, Washington, Line Segment 047, Milepost 10.40, undated.

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.