Spokane, Portland and Seattle Railway Engineering Drawing: Topo Vicinity of Map, Bridge E81.4 - Underpass, south of Orville, Oregon, Line Segment 442, Milepost 81.41. Sheet S - 1 - 3, undated.

Spokane, Portland and Seattle Railway Engineering Drawing: Top Struts and Stringers, Bridge 9.6 - Columbia River, Vancouver, Washington, Line Segment 047, Milepost 9.31. Sheet Z - 2 - 14 - 7, undated.

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

Spokane, Portland and Seattle Railway Engineering Drawing: Top Re - Bar Spacing, Bridge E43.4 - Willamette River, south of Tualatin, Oregon, Line Segment 442, Milepost 43.24. Sheet 370 - 6592, undated.

Spokane, Portland and Seattle Railway Engineering Drawing: Top Laterals, Struts, Bridge A84.8 - Blind Slough, west of Clifton, Oregon, Line Segment 440, Milepost 84.71, undated.

Spokane, Portland and Seattle Railway Engineering Drawing: Top Laterals, Portal Strut, Bridge A62.7 - Clatskanie River, west of Clatskanie, Oregon, Line Segment 440, Milepost 62.67, undated.

Spokane, Portland and Seattle Railway Engineering Drawing: Top Laterals and Ports, Bridge A62.7 - Clatskanie River, west of Clatskanie, Oregon, Line Segment 440, Milepost 62.67, undated.

Spokane, Portland and Seattle Railway Engineering Drawing: Top and Bottom Lateral Strut, Bridge A94.9 - John Day River, west of Knappa, Oregon, Line Segment 440, Milepost 94.80, undated.

Spokane, Portland and Seattle Railway Engineering Drawing: Top and Bottom Chord Section, Bridge A84.8 - Blind Slough, west of Clifton, Oregon, Line Segment 440, Milepost 84.71, undated.