Northern Pacific Engineering Drawing: Detail of Pier 3, Bridge 51 - Bitter Root River, Grantsdale, Montana, Line Segment 333, Milepost 51.1. Sheet 1274 - 13, undated.

Northern Pacific Engineering Drawing: Detail of Piers 2 and 6, Bridge 51 - Bitter Root River, Grantsdale, Montana, Line Segment 333, Milepost 51.1. Sheet 1274 - 13, undated.

Northern Pacific Engineering Drawing: Detail of Piers 4 and 5, Bridge 51 - Bitter Root River, Grantsdale, Montana, Line Segment 333, Milepost 51.1. Sheet 1274 - 13, undated.

Northern Pacific Engineering Drawing: Detail Timber Deck Span, Bridge 59 - Rock Creek, south of Grantsdale, Montana, Line Segment 333, Milepost 59.9. Sheet 1059 - 7, 1941. Note: Timber bridge - remove pony truss

Northern Pacific Engineering Drawing: General Plan, Bridge 51 - Bitter Root River, Grantsdale, Montana, Line Segment 333, Milepost 51.1. Sheet 1274 - 13, 1948. Note: Rebuild with steel spans