Spokane, Portland and Seattle Railway Engineering Drawing: Centers of River Bottom, Bridge 9.6 - Columbia River, Vancouver, Washington, Line Segment 047, Milepost 9.31. Sheet Z - 3 - 27 - 6, undated.

Spokane, Portland and Seattle Railway Engineering Drawing: Centrifugal Switch, Bridge 9.6 - Columbia River, Vancouver, Washington, Line Segment 047, Milepost 9.31. Sheet Z - 2 - 13 - 10, undated.

Spokane, Portland and Seattle Railway Engineering Drawing: Chord Lateral/Packing Diagram, Bridge 9.6 - Columbia River, Vancouver, Washington, Line Segment 047, Milepost 9.31, undated.

Spokane, Portland and Seattle Railway Engineering Drawing: Chord, Laterals, Pack Diagonal, Bridge 9.6 - Columbia River, Vancouver, Washington, Line Segment 047, Milepost 9.31. Sheet Z - 2 - 14 - 5, undated.

Spokane, Portland and Seattle Railway Engineering Drawing: Chord, Laterals, Pack Diagonal, Bridge 9.6 - Columbia River, Vancouver, Washington, Line Segment 047, Milepost 9.31. Sheet Z - 2 - 14 - 5, undated.

Spokane, Portland and Seattle Railway Engineering Drawing: Control Interlock Details, Bridge 9.6 - Columbia River, Vancouver, Washington, Line Segment 047, Milepost 9.31. Sheet Z - 2 - 13 - 25, undated.

Spokane, Portland and Seattle Railway Engineering Drawing: Control Interlock Details, Bridge 9.6 - Columbia River, Vancouver, Washington, Line Segment 047, Milepost 9.31. Sheet Z - 2 - 13 - 26, undated.

Spokane, Portland and Seattle Railway Engineering Drawing: Controller Details, Bridge 9.6 - Columbia River, Vancouver, Washington, Line Segment 047, Milepost 9.31. Sheet Z - 2 - 13 - 33, undated.

Spokane, Portland and Seattle Railway Engineering Drawing: Controller Support, Bridge 9.6 - Columbia River, Vancouver, Washington, Line Segment 047, Milepost 9.31. Sheet Z - 2 - 13 - 34, undated.

Spokane, Portland and Seattle Railway Engineering Drawing: Controller Table, Bridge 9.6 - Columbia River, Vancouver, Washington, Line Segment 047, Milepost 9.31. Sheet Z - 2 - 13 - 35, undated.