Burlington Northern Engineering Drawing: Deck Plan, Bridge 57 (formerly Northern Pacific), west of Phosphate, Montana, Line Segment 042, Milepost 57.5. Sheet VF 421 - 34, 1984.

Burlington Northern Engineering Drawing: Deck Plan, Bridge 59.1 (99) - Hell Gate River (formerly Northern Pacific), west of Phosphate, Montana, Line Segment 042, Milepost 59.9. Sheet 775 - 23, 1979.

Northern Pacific Engineering Drawing: Alter 32 Foot Span, Bridge 0 - Clark Fork River, north of Phosphate, Montana, Line Segment 368, Milepost 0.06. Sheet 1268 - 26, 1955.

Northern Pacific Engineering Drawing: Bent 10 and 14, Bridge 0 - Clark Fork River, north of Phosphate, Montana, Line Segment 368, Milepost 0.06. Sheet 1268 - 26, undated.

Northern Pacific Engineering Drawing: Cross Section on Centerline Between Tracks, Bridge 59.1 (99) - Hell Gate River, west of Phosphate, Montana, Line Segment 042, Milepost 59.9. Sheet 775 - 23, undated.

Northern Pacific Engineering Drawing: Detail of End Bearings, Bridge 59 (98) - Hell Gate River, west of Phosphate, Montana, Line Segment 042, Milepost 59.6. Sheet 775 - 22, undated.

Northern Pacific Engineering Drawing: Detail of Floor Beam/Stringer, Bridge 59 (98) - Hell Gate River, west of Phosphate, Montana, Line Segment 042, Milepost 59.6. Sheet 775 - 22, undated.