Spokane, Portland and Seattle Railway Engineering Drawing: Masonry Plan, 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: Masonry Plan, 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: Masonry Plan, 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: Plan - Cast Iron Base, Bridge 270.0 - Box Canyon, north of Farrington, Washington, Line Segment 047, Milepost 270.0. Sheet A - A - 435, undated.

Spokane, Portland and Seattle Railway Engineering Drawing: Plan - Cast Iron Bases, Bridge 269.1 - Wilson Canyon, Farrington, Washington, Line Segment 047, Milepost 269.1. Sheet A - A - 435, undated.

Spokane, Portland and Seattle Railway Engineering Drawing: Plan - Concrete Head Block, 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: Raise east Abutment, Bridge 269.1 - Wilson Canyon, Farrington, Washington, Line Segment 047, Milepost 269.1, undated.

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

Spokane, Portland and Seattle Railway Engineering Drawing: Revision to Abutment, Bridge 270.0 - Box Canyon, north of Farrington, Washington, Line Segment 047, Milepost 270.0. Sheet 0 - 1 - 1, 1926.