Spokane, Portland and Seattle Railway Engineering Drawing: Soundings, Bridge 5.1 - Willamette River, north of Willbridge, Oregon, Line Segment 047, Milepost 5.15. Sheet G - 4 - 8, undated.

Spokane, Portland and Seattle Railway Engineering Drawing: Soundings, Bridge 5.1 - Willamette River, north of Willbridge, Oregon, Line Segment 047, Milepost 5.15, undated.

Spokane, Portland and Seattle Railway Engineering Drawing: Soundings, Bridge 5.1 - Willamette River, north of Willbridge, Oregon, Line Segment 047, Milepost 5.15. Sheet G - 4 - 8 - 1, undated.

Spokane, Portland and Seattle Railway Engineering Drawing: Slow Down Engine, Bridge 5.1 - Willamette River, north of Willbridge, Oregon, Line Segment 047, Milepost 5.15. Sheet Z - 1 - 5 - 28, undated.

Spokane, Portland and Seattle Railway Engineering Drawing: Sketch Oregon Railroad and Navigation Company Crossing, Bridge 5.7 - Union Pacific Railroad, north of Willbridge, Oregon, Line Segment 047, Milepost 5.73, undated.

Spokane, Portland and Seattle Railway Engineering Drawing: Signal Light Box, Bridge 5.1 - Willamette River, north of Willbridge, Oregon, Line Segment 047, Milepost 5.15. Sheet Z - 1 - 5 - 9, undated.

Spokane, Portland and Seattle Railway Engineering Drawing: Shop Plan - Web Plate, Bridge 5.1 - Willamette River, north of Willbridge, Oregon, Line Segment 047, Milepost 5.15. Sheet 231 - 7065 - 31, undated.

Spokane, Portland and Seattle Railway Engineering Drawing: Shop Plan - Turning Machinery, Bridge 5.1 - Willamette River, north of Willbridge, Oregon, Line Segment 047, Milepost 5.15. Sheet Z - 1 - 4 - 1, undated.

Spokane, Portland and Seattle Railway Engineering Drawing: Shop Plan - Tower Posts, Bridge 5.1 - Willamette River, north of Willbridge, Oregon, Line Segment 047, Milepost 5.15. Sheet Z - 1 - 3 - 17, undated.

Spokane, Portland and Seattle Railway Engineering Drawing: Shop Plan - Tow Brace, Bridge 5.1 - Willamette River, north of Willbridge, Oregon, Line Segment 047, Milepost 5.15. Sheet Z - 1 - 3 - 38, undated.