Northern Pacific Engineering Drawing: Signal and Section Crew Building at Superior, Montana, prepared in 1969. Burlington Northern File Number 1283-1, Reference Number 10107, Sheet 001.

Northern Pacific Engineering Drawing: Signal and Section Crew Building at Superior, Montana, prepared in 1969. Burlington Northern File Number 1283-2, Reference Number 10107, Sheet 002.

Northern Pacific Engineering Drawing: Signal and Section Crew Building at Superior, Montana, prepared in 1976. Burlington Northern File Number 1283-4, Reference Number 10110.

Northern Pacific Engineering Drawing: Signal and Section Crew Building at Superior, Montana, prepared in 1976. Burlington Northern File Number 1283-3, Reference Number 10110.

Northern Pacific Engineering Drawing: Signal and Section Crew Building at Superior, Montana, prepared in 1977. Burlington Northern File Number 1283-E1, Reference Number 10104.

Northern Pacific Engineering Drawing: Signal and Section Crew Building at Superior, Montana, undated. Burlington Northern File Number 1283, Reference Number 101.