Plat Map of Northern Pacific facilities at Park City, Montana, March 22, 1898, Sheet Number 1, Line Segment 41, showing the Billings-Helena line.

Plat Map of Northern Pacific facilities at Park City, Montana, March 22, 1898, Sheet Number 2, Line Segment 41, showing the Billings-Helena line.

Plat Map of Northern Pacific facilities at Park City, Montana, March 22, 1898, Sheet Number 3, Line Segment 41, showing the Billings-Helena line.

Northern Pacific Engineering Drawing: Walk Addition, Bridge 29, west of Park City, Montana, Line Segment 041, Milepost 29.8. Sheet 787 - 48, undated.

Northern Pacific Engineering Drawing: Walk Addition, Bridge 28 - Irrigation Ditch, west of Park City, Montana, Line Segment 041, Milepost 28.6. Sheet 1068 - 10, undated.

Northern Pacific Engineering Drawing: Walk Addition, Bridge 24, west of Park City, Montana, Line Segment 041, Milepost 24.3. Sheet 1068 - 9, undated.

Northern Pacific Engineering Drawing: Rebuild Span Reinforcement, Bridge 26 - Tilden Creek, west of Park City, Montana, Line Segment 041, Milepost 26.95. Sheet 2004 - 12, 1958. Note: Rebuild as concrete trestle

Northern Pacific Engineering Drawing: General Plan/Details, Bridge 28 - Irrigation Ditch, west of Park City, Montana, Line Segment 041, Milepost 28.6. Sheet 1068 - 10, 1925.

Northern Pacific Engineering Drawing: General Plan/Detail Substation, Bridge 24, west of Park City, Montana, Line Segment 041, Milepost 24.3. Sheet 1068 - 9, 1925. Note: Steel spans