Plat Map of Northern Pacific facilities at Trident, Montana, April 29, 1910, Sheet Number 1, Line Segment 41, showing the Billings-Helena line.

Plat Map of Northern Pacific facilities at Trident, Montana, April 29, 1910, Sheet Number 2, Line Segment 41, showing the Billings-Helena line.

Northern Pacific Engineering Drawing: Depot at Trident, Montana, prepared in 1976. Burlington Northern File Number 1254-6, Reference Number 10109.

Northern Pacific Engineering Drawing: Depot at Trident, Montana, prepared in 1976. Burlington Northern File Number 1254-E1, Reference Number 10109.

Northern Pacific Engineering Drawing: Depot at Trident, Montana, prepared in 1910. Burlington Northern File Number 1254-4, Reference Number 10112.

Northern Pacific Engineering Drawing: Depot at Trident, Montana, prepared in 1910. Burlington Northern File Number 1254-5, Reference Number 10112.

Northern Pacific Engineering Drawing: Depot at Trident, Montana, prepared in 1910. Burlington Northern File Number 1254-3, Reference Number 10112.

Northern Pacific Engineering Drawing: Depot at Trident, Montana, prepared in 1910. Burlington Northern File Number 1254-2, Reference Number 10112.

Northern Pacific Engineering Drawing: Depot at Trident, Montana, prepared in 1910. Burlington Northern File Number 1254-1, Reference Number 10112.

Northern Pacific Engineering Drawing: General/Masonry Plan, Bridge 178, west of Trident, Montana, Line Segment 041, Milepost 178.4. Sheet 1058 - 14, 1919.