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Spokane, Portland and Seattle Railway Engineering Drawing: Portal, Bridge 8.8 - Oregon Slough, north of North Portland Junction, Oregon, Line Segment 047, Milepost 8.62. Sheet Z - 2 - 18 - 8, undated.

Spokane, Portland and Seattle Railway Engineering Drawing: Portal, Bridge 5.1 - Willamette River, north of Willbridge, Oregon, Line Segment 047, Milepost 5.15. Sheet Z - 1 - 6 - 7, undated.

Spokane, Portland and Seattle Railway Engineering Drawing: Portal Details, Bridge 9.6 - Columbia River, Vancouver, Washington, Line Segment 047, Milepost 9.31. Sheet Z - 2 - 16 - 6, undated.

Spokane, Portland and Seattle Railway Engineering Drawing: Portal and Top Struts, Bridge 9.6 - Columbia River, Vancouver, Washington, Line Segment 047, Milepost 9.31. Sheet Z - 1 - 9 - 14, undated.

Spokane, Portland and Seattle Railway Engineering Drawing: Portal and Top Strut Detail, Bridge 5.1 - Willamette River, north of Willbridge, Oregon, Line Segment 047, Milepost 5.15. Sheet Z - 1 - 1 - 11, undated.

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

Spokane, Portland and Seattle Railway Engineering Drawing: Portal and Cross Frames, Bridge 9.6 - Columbia River, Vancouver, Washington, Line Segment 047, Milepost 9.31. Sheet Z - 1 - 9 - 15, undated.

Spokane, Portland and Seattle Railway Engineering Drawing: Points for Backwalls, Bridge 7.0 - Maegley Junction, East Saint Johns, Oregon, Line Segment 047, Milepost 7.05. Sheet CC - 532, undated.