Plat Map of Northern Pacific facilities at Avon, Montana, undated, Sheet Number 1, Line Segment 41, showing the Helena-Paradise line.

Plat Map of Northern Pacific facilities at Avon, Montana, undated, Sheet Number 3, Line Segment 42, showing the Helena-Paradise line.

Plat Map of Northern Pacific facilities at Avon, Montana, undated, Sheet Number 2, Line Segment 41, showing the Helena-Paradise line.

Northern Pacific Engineering Drawing: Signal Maintainers House Toilet and Water Facilities at Manitoba Junction, Minnesota (also Medora, North Dakota, Sanders, Montana, Louisville, Montana and Avon, Montana), prepared in 1959. Burlington Northern File Number 4960, Reference Number 10104, Sheet 001.

Northern Pacific Engineering Drawing: Walk Details, Bridge 41 (63), west of Avon, Montana, Line Segment 042, Milepost 41.6. Sheet 441 - 40, undated.

Northern Pacific Engineering Drawing: Tie Plan, Bridge 38 - Little Blackfoot Creek, west of Avon, Montana, Line Segment 042, Milepost 38.4. Sheet 441 - 52, undated.

Northern Pacific Engineering Drawing: Repair to west Abutment, Bridge 41 (63), west of Avon, Montana, Line Segment 042, Milepost 41.6. Sheet 441 - 40, undated.