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: Soundings, Bridge 5.1 - Willamette River, north of Willbridge, Oregon, Line Segment 047, Milepost 5.15. Sheet G - 4 - 8 - 2, 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, 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 - 3, 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, 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: Span Swing Motors, Bridge 5.1 - Willamette River, north of Willbridge, Oregon, Line Segment 047, Milepost 5.15. Sheet Z - 1 - 5 - 12, undated.

Spokane, Portland and Seattle Railway Engineering Drawing: Stairway Operating House, Bridge 5.1 - Willamette River, north of Willbridge, Oregon, Line Segment 047, Milepost 5.15. Sheet Z - 1 - 1 - 15, undated.