Northern Pacific Engineering Drawing: General Plan, Bridge 48 - Deer Lodge River, north of Deer Lodge, Montana, Line Segment 327, Milepost 48.9. Sheet 1074 - 7, 1928. Note: Steel spans

Northern Pacific Engineering Drawing: General Plan, Bridge 5 - Highway, south of Zangar Junction, Washington, Line Segment 451, Milepost 5.07. Sheet 1064 - 5, 1932. Note: Steel span and AFE timber trestle

Northern Pacific Engineering Drawing: General Plan, Bridge 50 - Little Blackfoot River, north of Deer Lodge, Montana, Line Segment 327, Milepost 50.3. Sheet VF 1263 - 5, undated. Note: Shift steel spans

Northern Pacific Engineering Drawing: General Plan, Bridge 51 - Bitter Root River, Grantsdale, Montana, Line Segment 333, Milepost 51.1. Sheet 1274 - 13, 1948. Note: Rebuild with steel spans

Northern Pacific Engineering Drawing: General Plan, Bridge 51 - Hannaford Creek, south of Wabash, Washington, Line Segment 052, Milepost 51.9. Sheet 443 - 26, 1897. Note: Steel spans

Northern Pacific Engineering Drawing: General Plan, Bridge 51 - Hannaford Creek, south of Wabash, Washington, Line Segment 052, Milepost 51.9. Sheet 443 - 26, 1934. Note: New steel spans

Northern Pacific Engineering Drawing: General Plan, Bridge 51 - Hannaford Creek, south of Wabash, Washington, Line Segment 052, Milepost 51.9. Sheet 443 - 26, undated.

Northern Pacific Engineering Drawing: General Plan, Bridge 51 - Hannaford Creek, south of Wabash, Washington, Line Segment 052, Milepost 51.9. Sheet 443 - 26, undated.

Northern Pacific Engineering Drawing: General Plan, Bridge 51 (50), west of Spire Rock, Montana, Line Segment 326, Milepost 51.5. Sheet 293 - 1, undated. Note: Steel viaduct

Northern Pacific Engineering Drawing: General Plan, Bridge 51 (78) - Yellowstone River, west of Craver, Montana, Line Segment 041, Milepost 51.5. Sheet 441 - 13, 1917. Note: Steel trusses