Northern Pacific Engineering Drawing: Standard 30 Foot Beam Span, Bridge 128 - Salmon Creek, south of Ridgefield, Washington, Line Segment 052, Milepost 128.59. Sheet 779 - 18, undated.

Northern Pacific Engineering Drawing: Sketch of Base Casting, Bridge 128 - Salmon Creek, south of Ridgefield, Washington, Line Segment 052, Milepost 128.59. Sheet 779 - 18, undated.

Northern Pacific Engineering Drawing: Shop Plan - Cross Frame and Laterals, Bridge 124 - Underpass, south of Ridgefield, Washington, Line Segment 052, Milepost 124.45. Sheet 1073 - 18, undated.

Northern Pacific Engineering Drawing: Shop Plan - Bottom Laterals, Bridge 124 - Underpass, south of Ridgefield, Washington, Line Segment 052, Milepost 124.45. Sheet 1073 - 18, undated.

Northern Pacific Engineering Drawing: Shop Plan - Bill of Material, Bridge 128 - Salmon Creek, south of Ridgefield, Washington, Line Segment 052, Milepost 128.59. Sheet 779 - 18, undated.

Northern Pacific Engineering Drawing: Shop Plan - Bill of Material Washers, Bridge 124 - Underpass, south of Ridgefield, Washington, Line Segment 052, Milepost 124.45. Sheet 1073 - 18, undated.

Northern Pacific Engineering Drawing: Shop Plan - Bill of Material Pedestals, Bridge 124 - Underpass, south of Ridgefield, Washington, Line Segment 052, Milepost 124.45. Sheet 1073 - 18, undated.

Northern Pacific Engineering Drawing: Shop Plan - Bill of Material Bolts, Bridge 124 - Underpass, south of Ridgefield, Washington, Line Segment 052, Milepost 124.45. Sheet 1073 - 18, undated.

Northern Pacific Engineering Drawing: Shop Plan - Bill of Material Bolts, Bridge 124 - Underpass, south of Ridgefield, Washington, Line Segment 052, Milepost 124.45. Sheet 1073 - 18, undated.

Northern Pacific Engineering Drawing: Shop Plan - Beam Span, Bridge 128 - Salmon Creek, south of Ridgefield, Washington, Line Segment 052, Milepost 128.59. Sheet 779 - 18, undated.