Plat Map of Great Northern, Northern Pacific facilities at Helena, Montana, December 1, 1915, Drawing Number 31079-1, Sheet Number 2, Line Segment 713, showing the Great Northern mainline, Northern Pacific yard.

Plat Map of Northern Pacific facilities at Helena, Montana, June 14, 1917, Sheet Number 4, Line Segment 713, showing the Northern Pacific mainline, Rimini branch.

Plat Map of Northern Pacific facilities at Helena, Montana, June 14, 1917, Sheet Number 4, Line Segment 713, showing the Northern Pacific mainline, Great Northern interchange.

Plat Map of Northern Pacific facilities at Helena, Montana, June 14, 1917, Sheet Number 2, Line Segment 713, showing the Northern Pacific mainline, Great Northern interchange.

Plat Map of Northern Pacific facilities at Helena, Montana, June 14, 1917, Sheet Number 1, Line Segment 713, showing the Northern Pacific mainline, Great Northern interchange.

Plat Map of Northern Pacific facilities at Helena, Montana, September 30, 1931, Sheet Number 1, Line Segment 713, showing the Northern Pacific yard, Great Northern mainline.

Plat Map of Northern Pacific facilities at Helena, Montana, September 30, 1931, Sheet Number 2, Line Segment 713, showing the Northern Pacific yard, industry spurs, Great Northern mainline.

Plat Map of Northern Pacific facilities at Helena, Montana, September 30, 1931, Sheet Number 3, Line Segment 713, showing the Northern Pacific yard, spurs, depot.

Plat Map of Northern Pacific facilities at Helena, Montana, September 30, 1931, Sheet Number 3, Line Segment 713, showing the Northern Pacific mainline, industry spurs.

Plat Map of Northern Pacific facilities at Helena, Montana, August 1, 1933, Sheet Number 1, Line Segment 713, showing the Helena yard, fairgrounds.