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 12.3 - Van Sycle Creek, south of Zangar Junction, Washington, Line Segment 451, Milepost 12.47. Sheet 1266 - 29, undated.

Northern Pacific Engineering Drawing: Tie Plan, Bridge 12.3 - Van Sycle Creek, south of Zangar Junction, Washington, Line Segment 451, Milepost 12.47. Sheet 1266 - 29, undated.

Northern Pacific Engineering Drawing: Tie Plan, Bridge 122, west of Missoula, Montana, Line Segment 042, Milepost 122.5. Sheet 441 - 41, undated.

Northern Pacific Engineering Drawing: Tie Plan, Bridge 122, west of Missoula, Montana, Line Segment 042, Milepost 122.5. Sheet 441 - 41, 1956.

Northern Pacific Engineering Drawing: Tie Plan, Bridge 12.2 - Van Sycle Creek, south of Zangar Junction, Washington, Line Segment 451, Milepost 12.32. Sheet 1266 - 28, undated.

Northern Pacific Engineering Drawing: Tie Plan, Bridge 12.2 - Van Sycle Creek, south of Zangar Junction, Washington, Line Segment 451, Milepost 12.32. Sheet 1266 - 28, undated.

Northern Pacific Engineering Drawing: Tie Plan, Bridge 12.1 - Van Sycle Creek, south of Zangar Junction, Washington, Line Segment 451, Milepost 12.21. Sheet 2012 - 7, 1953.

Northern Pacific Engineering Drawing: Tie Plan, Bridge 12.1 - Black River, west of Grand Mound, Washington, Line Segment 421, Milepost 12.6. Sheet 447 - 39, 1949.