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

Spokane, Portland and Seattle Railway Engineering Drawing: Typical Tower Details, Bridge 270.0 - Box Canyon, north of Farrington, Washington, Line Segment 047, Milepost 270.0. Sheet 0 - 1 - 1, undated.

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

Spokane, Portland and Seattle Railway Engineering Drawing: Tie Plan, Bridge 269.1 - Wilson Canyon, Farrington, Washington, Line Segment 047, Milepost 269.1. Sheet NO2332, 1959.

Spokane, Portland and Seattle Railway Engineering Drawing: Tie Plan, Bridge 269.1 - Wilson Canyon, Farrington, Washington, Line Segment 047, Milepost 269.1. Sheet NO233B, 1959.

Spokane, Portland and Seattle Railway Engineering Drawing: Tie Framing Plan, Bridge 270.0 - Box Canyon, north of Farrington, Washington, Line Segment 047, Milepost 270.0. Sheet NO - 410, undated.

Spokane, Portland and Seattle Railway Engineering Drawing: Tie Framing Plan, Bridge 270.0 - Box Canyon, north of Farrington, Washington, Line Segment 047, Milepost 270.0. Sheet N0 - 410A, undated.

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