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Spokane, Portland and Seattle Railway Engineering Drawing: Rail Locks, Bridge 8.8 - Oregon Slough, north of North Portland Junction, Oregon, Line Segment 047, Milepost 8.62, undated.

Spokane, Portland and Seattle Railway Engineering Drawing: Rail Locks, Bridge 5.1 - Willamette River, north of Willbridge, Oregon, Line Segment 047, Milepost 5.15. Sheet Z - 1 - 2 - 12, undated.

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

Spokane, Portland and Seattle Railway Engineering Drawing: Rail Lock, Bridge 9.6 - Columbia River, Vancouver, Washington, Line Segment 047, Milepost 9.31. Sheet Z - 2 - 10 - 16, undated.

Spokane, Portland and Seattle Railway Engineering Drawing: Rail Lock Repairs, Bridge A62.7 - Clatskanie River, west of Clatskanie, Oregon, Line Segment 440, Milepost 62.67. Sheet NO - 263B, undated.

Spokane, Portland and Seattle Railway Engineering Drawing: Rail Lock Motors, Bridge 5.1 - Willamette River, north of Willbridge, Oregon, Line Segment 047, Milepost 5.15. Sheet Z - 1 - 5 - 4, undated.

Spokane, Portland and Seattle Railway Engineering Drawing: Rail Lock Industry Switch, Bridge 5.1 - Willamette River, north of Willbridge, Oregon, Line Segment 047, Milepost 5.15. Sheet Z - 1 - 5 - 19, undated.

Spokane, Portland and Seattle Railway Engineering Drawing: Rail Lock Indicator Switch, Bridge 9.6 - Columbia River, Vancouver, Washington, Line Segment 047, Milepost 9.31. Sheet Z - 2 - 13 - 24, undated.

Spokane, Portland and Seattle Railway Engineering Drawing: Rail Lock Gearing, Bridge 9.6 - Columbia River, Vancouver, Washington, Line Segment 047, Milepost 9.31. Sheet Z - 2 - 10 - 4, undated.

Spokane, Portland and Seattle Railway Engineering Drawing: Rail Lock Gear Detail, Bridge 9.6 - Columbia River, Vancouver, Washington, Line Segment 047, Milepost 9.31. Sheet Z - 2 - 10 - 12, undated.