Spokane, Portland and Seattle Railway Engineering Drawing: Piping Diagram, Bridge 5.1 - Willamette River, north of Willbridge, Oregon, Line Segment 047, Milepost 5.15. Sheet Z - 1 - 5 - 18, undated.

Spokane, Portland and Seattle Railway Engineering Drawing: Portal and Frames, Bridge 5.1 - Willamette River, north of Willbridge, Oregon, Line Segment 047, Milepost 5.15. Sheet Z - 1 - 1 - 12, undated.

Spokane, Portland and Seattle Railway Engineering Drawing: Portal and Top Strut Detail, Bridge 5.1 - Willamette River, north of Willbridge, Oregon, Line Segment 047, Milepost 5.15. Sheet Z - 1 - 1 - 11, undated.

Spokane, Portland and Seattle Railway Engineering Drawing: Portal, Bridge 5.1 - Willamette River, north of Willbridge, Oregon, Line Segment 047, Milepost 5.15. Sheet Z - 1 - 6 - 7, undated.

Spokane, Portland and Seattle Railway Engineering Drawing: Power House, Bridge 5.1 - Willamette River, north of Willbridge, Oregon, Line Segment 047, Milepost 5.15. Sheet Z - 1 - 5 - 21, undated.

Spokane, Portland and Seattle Railway Engineering Drawing: Rail Lock Details, Bridge 5.1 - Willamette River, north of Willbridge, Oregon, Line Segment 047, Milepost 5.15. Sheet Z - 1 - 2 - 11, undated.

Spokane, Portland and Seattle Railway Engineering Drawing: Rail Lock Gear and Detail, Bridge 5.1 - Willamette River, north of Willbridge, Oregon, Line Segment 047, Milepost 5.15. Sheet Z - 1 - 2 - 9, undated.

Spokane, Portland and Seattle Railway Engineering Drawing: Rail Lock Gear and Detail, Bridge 5.1 - Willamette River, north of Willbridge, Oregon, Line Segment 047, Milepost 5.15. Sheet Z - 1 - 2 - 10, undated.

Spokane, Portland and Seattle Railway Engineering Drawing: Rail Lock Gear and Detail, Bridge 5.1 - Willamette River, north of Willbridge, Oregon, Line Segment 047, Milepost 5.15. Sheet Z - 1 - 2 - 10, undated.

Spokane, Portland and Seattle Railway Engineering Drawing: Rail Lock Gear and Detail, Bridge 5.1 - Willamette River, north of Willbridge, Oregon, Line Segment 047, Milepost 5.15. Sheet Z - 1 - 2 - 10A, undated.