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Spokane, Portland and Seattle Railway Engineering Drawing: Turning Machinery, Bridge 8.8 - Oregon Slough, north of North Portland Junction, Oregon, Line Segment 047, Milepost 8.62. Sheet Z - 3 - 22 - 24, undated.

Spokane, Portland and Seattle Railway Engineering Drawing: Turning Machinery, Bridge 5.1 - Willamette River, north of Willbridge, Oregon, Line Segment 047, Milepost 5.15. Sheet Z - 1 - 2 - 22, undated.

Spokane, Portland and Seattle Railway Engineering Drawing: Turning Machine Details, Bridge 5.1 - Willamette River, north of Willbridge, Oregon, Line Segment 047, Milepost 5.15. Sheet Z - 1 - 2 - 16, undated.

Spokane, Portland and Seattle Railway Engineering Drawing: Turning Gears, Bridge 8.8 - Oregon Slough, north of North Portland Junction, Oregon, Line Segment 047, Milepost 8.62. Sheet Z - 3 - 22 - 16, undated.

Spokane, Portland and Seattle Railway Engineering Drawing: Turning Gears, Bridge 8.8 - Oregon Slough, north of North Portland Junction, Oregon, Line Segment 047, Milepost 8.62. Sheet Z - 3 - 22 - 17, undated.

Spokane, Portland and Seattle Railway Engineering Drawing: Turning Gears, Bridge 5.1 - Willamette River, north of Willbridge, Oregon, Line Segment 047, Milepost 5.15. Sheet Z - 1 - 2 - 18, undated.

Spokane, Portland and Seattle Railway Engineering Drawing: Turning Gear Shaft, Bridge 8.8 - Oregon Slough, north of North Portland Junction, Oregon, Line Segment 047, Milepost 8.62. Sheet Z - 3 - 22 - 21, undated.

Spokane, Portland and Seattle Railway Engineering Drawing: Turning Gear Shaft Bearing, Bridge 8.8 - Oregon Slough, north of North Portland Junction, Oregon, Line Segment 047, Milepost 8.62. Sheet Z - 3 - 22 - 19, undated.

Spokane, Portland and Seattle Railway Engineering Drawing: Turning Gear Bearings, Bridge 8.8 - Oregon Slough, north of North Portland Junction, Oregon, Line Segment 047, Milepost 8.62. Sheet Z - 3 - 22 - 20, undated.

Spokane, Portland and Seattle Railway Engineering Drawing: Truss Span Stress Sheet, Bridge E43.4 - Willamette River, south of Tualatin, Oregon, Line Segment 442, Milepost 43.24. Sheet 370 - 6592 - 20, undated.