Plat Map of Northern Pacific facilities at Perma, Montana, January 19, 1933, Sheet Number 3, Line Segment 42, showing the Helena-Paradise line.

Plat Map of Northern Pacific facilities at Philipsburg, Montana, August 11, 1916, Sheet Number 1, Line Segment 340, showing the Drummond-Philipsburg line.

Plat Map of Northern Pacific facilities at Philipsburg, Montana, August 11, 1916, Sheet Number 2, Line Segment 340, showing the Drummond-Philipsburg line.

Plat Map of Northern Pacific facilities at Philipsburg, Montana, August 6, 1891, Sheet Number 1, Line Segment 340, showing the Drummond-Philipsburg line, mine spur.

Plat Map of Northern Pacific facilities at Philipsburg, Montana, August 6, 1891, Sheet Number 2, Line Segment 340, showing the Drummond-Philipsburg line, mine spur.

Plat Map of Northern Pacific facilities at Phosphate, Montana, December 14, 1953, Sheet Number 2, Line Segment 342, showing the Phosphate spur.

Plat Map of Northern Pacific facilities at Phosphate, Montana, December 14, 1953, Sheet Number 1, Line Segment 342, showing the Phosphate spur.

Plat Map of Northern Pacific facilities at Phosphate, Montana, September 13, 1955, Drawing Number 31134-2, Sheet Number 1, Line Segment 342, showing the Phosphate spur.

Plat Map of Northern Pacific facilities at Phosphate, Montana, September 13, 1955, Drawing Number 31134-2, Sheet Number 2, Line Segment 342, showing the Phosphate spur.

Plat Map of Northern Pacific facilities at Phosphate, Montana, September 13, 1955, Drawing Number 31134-2, Sheet Number 3, Line Segment 342, showing the Phosphate spur.