Spokane, Portland and Seattle Railway Engineering Drawing: Marking Diagram, Bridge 9.6 - Columbia River, Vancouver, Washington, Line Segment 047, Milepost 9.31. Sheet Z - 2 - 14 - 10, undated.

Spokane, Portland and Seattle Railway Engineering Drawing: Marking Diagram, Bridge 8.8 - Oregon Slough, north of North Portland Junction, Oregon, Line Segment 047, Milepost 8.62. Sheet Z - 3 - 26 - 7, undated.

Spokane, Portland and Seattle Railway Engineering Drawing: Marking Diagram, Bridge 66.4 - Little White Salmon River, east of Cooks, Washington, Line Segment 047, Milepost 66.32. Sheet NN193, undated.

Spokane, Portland and Seattle Railway Engineering Drawing: Map Sketch, Bridge 58.8 - Wind River, east of Stevenson, Washington, Line Segment 047, Milepost 58.74. Sheet N - S - 6 - 3, undated.

Spokane, Portland and Seattle Railway Engineering Drawing: Map Showing Topography, Bridge T125.7 - Crooked River, south of Opal City, Oregon, Line Segment 053, Milepost 125.71. Sheet 0 - 4 - 14, undated.

Spokane, Portland and Seattle Railway Engineering Drawing: Map of Willow Creek, Bridge T105.6 - Willow Creek, Madras, Oregon, Line Segment 053, Milepost 105.57. Sheet 9372, undated.

Spokane, Portland and Seattle Railway Engineering Drawing: Map of Ravine Section, Bridge T125.7 - Crooked River, south of Opal City, Oregon, Line Segment 053, Milepost 125.71. Sheet 0 - 4 - 14, undated.

Spokane, Portland and Seattle Railway Engineering Drawing: Map and Profile, Bridge 270.0 - Box Canyon, north of Farrington, Washington, Line Segment 047, Milepost 270.0, undated.

Spokane, Portland and Seattle Railway Engineering Drawing: Manlift Cage, Bridge T0.4 - Columbia River, south of Wishram, Washington, Line Segment 053, Milepost 0.37. Sheet WX - 208, undated.