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

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

Spokane, Portland and Seattle Railway Engineering Drawing: Intermediate and End Truss Stringers, Bridge A62.7 - Clatskanie River, west of Clatskanie, Oregon, Line Segment 440, Milepost 62.67, undated.

Spokane, Portland and Seattle Railway Engineering Drawing: Interlock Device, Bridge 9.6 - Columbia River, Vancouver, Washington, Line Segment 047, Milepost 9.31. Sheet Z - 2 - 13 - 36, undated.

Spokane, Portland and Seattle Railway Engineering Drawing: Interlock Details, Bridge 5.1 - Willamette River, north of Willbridge, Oregon, Line Segment 047, Milepost 5.15. Sheet Z - 1 - 5 - 7, undated.

Spokane, Portland and Seattle Railway Engineering Drawing: Interlock Details, Bridge 5.1 - Willamette River, north of Willbridge, Oregon, Line Segment 047, Milepost 5.15. Sheet Z - 1 - 5 - 8, undated.

Spokane, Portland and Seattle Railway Engineering Drawing: Interior Box Girder, Bridge E26.2 - Beaverton Creek, west of Saint Helens, Oregon, Line Segment 442, Milepost 26.55. Sheet 387 - 8422, undated.

Spokane, Portland and Seattle Railway Engineering Drawing: Index, Bridge 10.7 - Columbia Street, Vancouver, Washington, Line Segment 047, Milepost 10.69. Sheet 362 - 8103, undated.

Spokane, Portland and Seattle Railway Engineering Drawing: Hook Floor and Anchor, Bridge A27.4 (159) - Milton Creek, Saint Helens, Oregon, Line Segment 440, Milepost 27.40, undated.

Spokane, Portland and Seattle Railway Engineering Drawing: Hood Contour Cross, Bridge 72.8 - White Salmon River, east of Hood, Washington, Line Segment 047, Milepost 72.80. Sheet N5 - 10, undated.