Plat Map of Northern Pacific facilities at Townsend, Montana, August 15, 1929, Sheet Number 3, Line Segment 41, showing the Billings-Helena line.

Plat Map of Northern Pacific facilities at Townsend, Montana, August 15, 1929, Sheet Number 5, Line Segment 41, showing the Billings-Helena line.

Plat Map of Northern Pacific facilities at Trentwood, Washington, September 30, 1942, Sheet Number 1, Line Segment 45, showing the Kootenai-Spokane line.

Plat Map of Northern Pacific facilities at Trentwood, Washington, September 30, 1942, Sheet Number 2, Line Segment 45, showing the Kootenai-Spokane line.

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.

Plat Map of Northern Pacific facilities at Trout Creek, Montana, February 22, 1933, Sheet Number 1, Line Segment 44, showing the Paradise-Kootenai line.

Plat Map of Northern Pacific facilities at Trout Creek, Montana, February 22, 1933, Sheet Number 2, Line Segment 44, showing the Paradise-Kootenai line.

Plat Map of Northern Pacific facilities at Trout Creek, Montana, February 22, 1933, Sheet Number 4, Line Segment 44, showing the Paradise-Kootenai line.

Plat Map of Northern Pacific facilities at Trout Creek, Montana, February 22, 1933, Sheet Number 3, Line Segment 44, showing the Paradise-Kootenai line.