Northern Pacific Engineering Drawing: Control Tower at Missoula, Montana, prepared in 1966. Burlington Northern File Number 4821, Reference Number 10111, Sheet 004.

Northern Pacific Engineering Drawing: Control Tower at Missoula, Montana, prepared in 1966. Burlington Northern File Number 4821, Reference Number 10111, Sheet 003.

Northern Pacific Engineering Drawing: Control Tower at Missoula, Montana, prepared in 1967. Burlington Northern File Number 4821, Reference Number 10104, Sheet 006.

Northern Pacific Engineering Drawing: Control Tower at Missoula, Montana, prepared in 1967. Burlington Northern File Number 4821, Reference Number 10104, Sheet 001.

Northern Pacific Engineering Drawing: Crest Office at Retarder Yard at Pasco, Washington, prepared in 1956. Burlington Northern File Number 4653, Reference Number 10103, Sheet 1-A.

Northern Pacific Engineering Drawing: Crest Office at Retarder Yard at Pasco, Washington, prepared in 1970. Burlington Northern File Number 4653, Reference Number 10104, Sheet 003.

Northern Pacific Engineering Drawing: Crest Office at Retarder Yard at Pasco, Washington, prepared in 1970. Burlington Northern File Number 4654, Reference Number 10106, Sheet 005.

Northern Pacific Engineering Drawing: Crest Office at Retarder Yard at Pasco, Washington, prepared in 1970. Burlington Northern File Number 4653, Reference Number 10105, Sheet 003.

Northern Pacific Engineering Drawing: Crest Office at Retarder Yard at Pasco, Washington, prepared in 1970. Burlington Northern File Number 4653, Reference Number 10105, Sheet 001.

Northern Pacific Engineering Drawing: Crest Office at Retarder Yard at Pasco, Washington, prepared in 1970. Burlington Northern File Number 4653, Reference Number 10104, Sheet 002.