Spokane, Portland and Seattle Railway Engineering Drawing: Turntable Bearings, Bridge 8.8 - Oregon Slough, north of North Portland Junction, Oregon, Line Segment 047, Milepost 8.62. Sheet Z - 3 - 20 - 8, undated.

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

Spokane, Portland and Seattle Railway Engineering Drawing: Turntable and Radial Beams, Bridge 5.1 - Willamette River, north of Willbridge, Oregon, Line Segment 047, Milepost 5.15. Sheet Z - 1 - 1 - 10, undated.

Spokane, Portland and Seattle Railway Engineering Drawing: Turnout/West Approach, Bridge 31.8 - Underpass, Foster, Oregon, Line Segment 457, Milepost 31.83, undated.

Spokane, Portland and Seattle Railway Engineering Drawing: Turnout, Bridge A100.4 - Columbia River, Astoria, Oregon, Line Segment 440, Milepost 100.4. Sheet SS - 344, 1957.

Spokane, Portland and Seattle Railway Engineering Drawing: Turning Shaft Details, Bridge 5.1 - Willamette River, north of Willbridge, Oregon, Line Segment 047, Milepost 5.15. Sheet Z - 1 - 2 - 20, undated.

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.