Spokane, Portland and Seattle Railway Engineering Drawing: 74 Foot - 7 1/2 Inch Girder, 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: Abutment and Temporary Truss Application, 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: Ballast Bridge Details, Bridge 270.0 - Box Canyon, north of Farrington, Washington, Line Segment 047, Milepost 270.0. Sheet CC - 526, 1921.

Spokane, Portland and Seattle Railway Engineering Drawing: Bearings - 60 Foot Girder, Bridge 270.0 - Box Canyon, north of Farrington, Washington, Line Segment 047, Milepost 270.0. Sheet WW - 103, undated.

Spokane, Portland and Seattle Railway Engineering Drawing: Details - Pedestals, 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: End Frame Bents, Bridge 269.1 - Wilson Canyon, Farrington, Washington, Line Segment 047, Milepost 269.1. Sheet N - 4 - 11, undated.

Spokane, Portland and Seattle Railway Engineering Drawing: End Frame Bents, Bridge 269.1 - Wilson Canyon, Farrington, Washington, Line Segment 047, Milepost 269.1. Sheet N - 4 - 11, undated.

Spokane, Portland and Seattle Railway Engineering Drawing: Falsework Plan, Bridge 270.0 - Box Canyon, north of Farrington, Washington, Line Segment 047, Milepost 270.0. Sheet NO - 235, 1926.