Plat Map of Northern Pacific facilities at Chestnut, Montana, May 10, 1918, Sheet Number 3, Line Segment 41, showing the Billings-Helena line.

Plat Map of Northern Pacific facilities at Chestnut, Montana, May 10, 1918, Sheet Number 1, Line Segment 41, showing the Billings-Helena line.

Plat Map of Northern Pacific facilities at Chestnut, Montana, May 10, 1918, Sheet Number 4, Line Segment 41, showing the Billings-Helena line.

Plat Map of Northern Pacific facilities at Chestnut, Montana, May 10, 1918, Sheet Number 2, Line Segment 41, showing the Billings-Helena line.

Northern Pacific Engineering Drawing: Repair Right End of Pier, Bridge 134 (169), west of Chestnut, Montana, Line Segment 041, Milepost 134.1. Sheet 1069 - 31, undated.

Northern Pacific Engineering Drawing: Plan of Pier/Abutment, Bridge 134 (169), west of Chestnut, Montana, Line Segment 041, Milepost 134.1. Sheet 1069 - 31, 1901. Note: 3 steel spans