Spokane, Portland and Seattle Railway Engineering Drawing: Circuit Breaker Details, Bridge 5.1 - Willamette River, north of Willbridge, Oregon, Line Segment 047, Milepost 5.15. Sheet Z - 1 - 5 - 29, undated.

Spokane, Portland and Seattle Railway Engineering Drawing: Chord, Laterals and Packing, Bridge 5.1 - Willamette River, north of Willbridge, Oregon, Line Segment 047, Milepost 5.15. Sheet Z - 1 - 6 - 4, undated.

Spokane, Portland and Seattle Railway Engineering Drawing: Chain Link Fence, Bridge 6.2 - Lombard Street, north of Willbridge, Oregon, Line Segment 047, Milepost 6.20. Sheet AA502, undated.

Spokane, Portland and Seattle Railway Engineering Drawing: Center Tower and Portals, Bridge 5.1 - Willamette River, north of Willbridge, Oregon, Line Segment 047, Milepost 5.15. Sheet Z - 1 - 1 - 5, undated.

Spokane, Portland and Seattle Railway Engineering Drawing: Bracket for Girders, Bridge 5.7 - Union Pacific Railroad, north of Willbridge, Oregon, Line Segment 047, Milepost 5.73. Sheet NN - 103, undated.

Spokane, Portland and Seattle Railway Engineering Drawing: Bottom Stringer and Beams, Bridge 5.1 - Willamette River, north of Willbridge, Oregon, Line Segment 047, Milepost 5.15. Sheet Z - 1 - 1 - 9, undated.