Northern Pacific Engineering Drawing: Underpinning - Abutment 1, Bridge 124 - Underpass, south of Ridgefield, Washington, Line Segment 052, Milepost 124.45. Sheet 1073 - 18, undated.

Northern Pacific Engineering Drawing: Tie Plan, Bridge 128 - Salmon Creek, south of Ridgefield, Washington, Line Segment 052, Milepost 128.59. Sheet 779 - 18, 1957.

Northern Pacific Engineering Drawing: Tie Plan, Bridge 128 - Salmon Creek, south of Ridgefield, Washington, Line Segment 052, Milepost 128.59. Sheet 779 - 18, 1946.

Northern Pacific Engineering Drawing: Tie Plan, Bridge 128 - Salmon Creek, south of Ridgefield, Washington, Line Segment 052, Milepost 128.59. Sheet 779 - 18, 1928.

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

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

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

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

Northern Pacific Engineering Drawing: Standard Plan 50 Foot Plate, Bridge 128 - Salmon Creek, south of Ridgefield, Washington, Line Segment 052, Milepost 128.59. Sheet 779 - 18, undated.