Plat Map of Great Northern facilities at Helena, Montana, March 1, 1913, Sheet Number 1, Line Segment 713, showing the Great Northern fairgrounds spur.

Plat Map of Great Northern facilities at Helena, Montana, March 1, 1913, Sheet Number 2, Line Segment 713, showing the Great Northern, Northern Pacific mainlines, interchange.

Plat Map of Great Northern facilities at Helena, Montana, December 1, 1915, Sheet Number 2, Line Segment 713, showing the Great Northern, Northern Pacific mainlines.

Plat Map of Great Northern facilities at Helena, Montana, December 1, 1915, Sheet Number 1, Line Segment 713, showing the Great Northern, Northern Pacific mainlines.

Plat Map of Great Northern facilities at Helena, Montana, November 1, 1930, Sheet Number 1, Line Segment 713, showing the Great Northern mainline, industry spur, Northern Pacific mainline.

Plat Map of Great Northern facilities at Helena, Montana, November 1, 1930, Sheet Number 2, Line Segment 713, showing the Great Northern industry spurs.

Plat Map of Great Northern facilities at Helena, Montana, August 1, 1960, Sheet Number 2, Line Segment 713, showing the Great Northern industry spurs, Northern Pacific yard.

Plat Map of Great Northern facilities at Helena, Montana, August 1, 1960, Sheet Number 1, Line Segment 713, showing the Great Northern right of way, Northern Pacific yard.

Plat Map of Great Northern facilities at Helena, Montana, August 1, 1960, Sheet Number 3, Line Segment 713, showing the Great Northern-Northern Pacific interchange, spurs.

Plat Map of Great Northern facilities at Helena, Montana, August 1, 1960, Sheet Number 1, Line Segment 713, showing the Great Northern, Northern Pacific mainlines, industry spurs.