Spokane, Portland and Seattle Railway Engineering Drawing: Tie Frame Plan, Bridge 47.0 - Hamilton Creek, east of Skamania, Washington, Line Segment 047, Milepost 47.02. Sheet 00 - 626, undated.

Spokane, Portland and Seattle Railway Engineering Drawing: Steel Design, Bridge 47.5 - Access Road, east of Skamania, Washington, Line Segment 047, Milepost 47.46. Sheet 315 - 6991 - 2, undated.

Spokane, Portland and Seattle Railway Engineering Drawing: Site Map, Bridge 47.5 - Access Road, east of Skamania, Washington, Line Segment 047, Milepost 47.46. Sheet 315 - 6991 - 9, undated.

Spokane, Portland and Seattle Railway Engineering Drawing: Shop Plan - Piece Location, Bridge 47.5 - Access Road, east of Skamania, Washington, Line Segment 047, Milepost 47.46. Sheet 315 - 6991 - 15, undated.

Spokane, Portland and Seattle Railway Engineering Drawing: Shop Plan - Miscellaneous Steel, Bridge 47.5 - Access Road, east of Skamania, Washington, Line Segment 047, Milepost 47.46. Sheet 315 - 6991 - 13, undated.

Spokane, Portland and Seattle Railway Engineering Drawing: Shop Plan - Girder/Cross Frame, Bridge 47.0 - Hamilton Creek, east of Skamania, Washington, Line Segment 047, Milepost 47.02, undated.

Spokane, Portland and Seattle Railway Engineering Drawing: Shop Plan - Deck Drain, Bridge 47.5 - Access Road, east of Skamania, Washington, Line Segment 047, Milepost 47.46. Sheet 315 - 6991 - 14, undated.

Spokane, Portland and Seattle Railway Engineering Drawing: Shop Plan - Bridge Bear, Bridge 47.5 - Access Road, east of Skamania, Washington, Line Segment 047, Milepost 47.46. Sheet 315 - 6991 - 12, undated.

Spokane, Portland and Seattle Railway Engineering Drawing: Shop Plan - Bridge Beam, Bridge 47.5 - Access Road, east of Skamania, Washington, Line Segment 047, Milepost 47.46. Sheet 315 - 6991 - 11, undated.

Spokane, Portland and Seattle Railway Engineering Drawing: Shop Plan - Bridge Beam, Bridge 47.5 - Access Road, east of Skamania, Washington, Line Segment 047, Milepost 47.46. Sheet 315 - 6991 - 10, undated.