Northern Pacific Engineering Drawing: Car Shop Brake Equipment Air Reservoir at Helena, Montana, prepared in 1914. Burlington Northern File Number 4619, Reference Number 10101.

Northern Pacific Engineering Drawing: Car Shop at Helena, Montana, prepared in 1952. Burlington Northern File Number 4619, Reference Number 10106, Sheet 001.

Northern Pacific Engineering Drawing: Car Shop at Helena, Montana, prepared in 1955. Burlington Northern File Number 4619, Reference Number 10101.

Northern Pacific Engineering Drawing: Depot at Helena, Montana, prepared in 1902. Burlington Northern File Number 4616, Reference Number 10111.

Northern Pacific Engineering Drawing: Depot at Helena, Montana, prepared in 1902. Burlington Northern File Number 4616, Reference Number 10112, Sheet 002.

Northern Pacific Engineering Drawing: Depot at Helena, Montana, prepared in 1902. Burlington Northern File Number 4616, Reference Number 10112, Sheet 001.

Northern Pacific Engineering Drawing: Depot at Helena, Montana, prepared in 1902. Burlington Northern File Number 4616, Reference Number 10112, Sheet 007.

Northern Pacific Engineering Drawing: Depot at Helena, Montana, prepared in 1902. Burlington Northern File Number 4616, Reference Number 10112, Sheet 014.

Northern Pacific Engineering Drawing: Depot at Helena, Montana, prepared in 1902. Burlington Northern File Number 4616, Reference Number 10110.

Northern Pacific Engineering Drawing: Depot at Helena, Montana, prepared in 1902. Burlington Northern File Number 4616, Reference Number 10110.