Northern Pacific Engineering Drawing: Steel Spans S2 east and S2 West, Bridge 1 - State Boulevard, Helena, Montana, Line Segment 042, Milepost 1.9. Sheet 1276 - 9, undated.

Northern Pacific Engineering Drawing: Steel Spans S1 west and S5 East, Bridge 1 - State Boulevard, Helena, Montana, Line Segment 042, Milepost 1.9. Sheet 1276 - 9, undated.

Northern Pacific Engineering Drawing: Steel Spans S1 east and S5 West, Bridge 1 - State Boulevard, Helena, Montana, Line Segment 042, Milepost 1.9. Sheet 1276 - 9, undated.

Northern Pacific Engineering Drawing: Steel Spans 1/2/3, Bridge 150 - Petty Creek, Lothrop, Montana, Line Segment 042, Milepost 150.8. Sheet 2017 - 5, undated.

Northern Pacific Engineering Drawing: Steel Repairs, Bridge 81 - Cowlitz River, south of Vader, Washington, Line Segment 052, Milepost 81.5. Sheet 429 - 17, undated.

Northern Pacific Engineering Drawing: Steel Repairs, Bridge 47 - Skookumchuck River, south of Bucoda, Washington, Line Segment 052, Milepost 47.4. Sheet 778 - 1, undated.

Northern Pacific Engineering Drawing: Steel Repairs, Bridge 36 - Deschutes River, south of East Olympia, Washington, Line Segment 052, Milepost 36.14. Sheet 782 - 22, undated.

Northern Pacific Engineering Drawing: Steel Repairs, Bridge 3.2 - Lake Pend Oreille, west of Sandpoint, Idaho, Line Segment 045, Milepost 3.88. Sheet 1070 - 2, undated.

Northern Pacific Engineering Drawing: Steel Repairs, Bridge 3 - Latah Creek, west of Empire, Washington, Line Segment 046, Milepost 3.29. Sheet 1059 - 6, undated.