Northern Pacific Engineering Drawing: Shop Plan - Strut and Miscellaneous, Bridge 36 - Clark Fork River, west of Thompson Falls, Montana, Line Segment 044, Milepost 36.6. Sheet 1266 - 25, undated.

Northern Pacific Engineering Drawing: Shop Plan - Structural Steel, Mullan Tunnel, Blossburg, Montana, Line Segment 042, Milepost 19.6, undated.

Northern Pacific Engineering Drawing: Shop Plan - Structural Steel, Mullan Tunnel, Blossburg, Montana, Line Segment 042, Milepost 19.6, undated.

Northern Pacific Engineering Drawing: Shop Plan - Structural Steel, Mullan Tunnel, Blossburg, Montana, Line Segment 042, Milepost 19.6, undated.

Northern Pacific Engineering Drawing: Shop Plan - Stringers, Bridge 9.46 - I-90, south of Wilburton, Washington, Line Segment 405, Milepost 9.9. Sheet 2034 - 1, undated.

Northern Pacific Engineering Drawing: Shop Plan - Stringers, Bridge 9.46 - I-90, south of Wilburton, Washington, Line Segment 405, Milepost 9.9. Sheet 2034 - 1, undated.

Northern Pacific Engineering Drawing: Shop Plan - Stringers, Bridge 9.46 - I-90, south of Wilburton, Washington, Line Segment 405, Milepost 9.9. Sheet 2034 - 1, undated.

Northern Pacific Engineering Drawing: Shop Plan - Stringers, Bridge 9.46 - I-90, south of Wilburton, Washington, Line Segment 405, Milepost 9.9. Sheet 2034 - 1, undated.

Northern Pacific Engineering Drawing: Shop Plan - Stringers, Bridge 81 - Cowlitz River, south of Vader, Washington, Line Segment 052, Milepost 81.5. Sheet 423 - 1, undated.