Spokane, Portland and Seattle Railway Engineering Drawing: Plan and Profile, Bridge 47.5 - Access Road, east of Skamania, Washington, Line Segment 047, Milepost 47.46. Sheet 315 - 6991 - 7, undated.

Spokane, Portland and Seattle Railway Engineering Drawing: Plan of Abutment, Bridge 42.7 - Duncan Creek, east of Skamania, Washington, Line Segment 047, Milepost 42.67. Sheet N - 1 - 10, undated.

Spokane, Portland and Seattle Railway Engineering Drawing: Plan of Abutment, Bridge 42.7 - Duncan Creek, east of Skamania, Washington, Line Segment 047, Milepost 42.67. Sheet N - 1 - 10, undated.

Spokane, Portland and Seattle Railway Engineering Drawing: Position of Bearing as Built, Bridge 42.7 - Duncan Creek, east of Skamania, Washington, Line Segment 047, Milepost 42.67. Sheet N - 1 - 10, undated.

Spokane, Portland and Seattle Railway Engineering Drawing: Precast Shims, Bridge 44.3 - Woodard Creek, east of Skamania, Washington, Line Segment 047, Milepost 44.30. Sheet SS 631, undated.

Spokane, Portland and Seattle Railway Engineering Drawing: Project Map and Index, Bridge 47.5 - Access Road, east of Skamania, Washington, Line Segment 047, Milepost 47.46. Sheet 315 - 6991 - 8, undated.

Spokane, Portland and Seattle Railway Engineering Drawing: Proposed Bridge, Bridge 44.3 - Woodard Creek, east of Skamania, Washington, Line Segment 047, Milepost 44.30. Sheet N - 1 - 11, 1909.

Spokane, Portland and Seattle Railway Engineering Drawing: Replace Stringer, Bridge 45.8 - Highway - Plan, east of Skamania, Washington, Line Segment 047, Milepost 45.8. Sheet NO 456, 1966. Note: Timber stringer - gone now

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.