Northern Pacific Engineering Drawing: Boiler House at Parkwater, Washington, undated. Burlington Northern File Number C15-3866, Reference Number 101.

Northern Pacific Engineering Drawing: Boiler House at Parkwater, Washington, undated. Burlington Northern File Number 300-41, Reference Number 101.

Northern Pacific Engineering Drawing: Boiler House at Parkwater, Washington, undated. Burlington Northern File Number 300-41, Reference Number 101.

Northern Pacific Engineering Drawing: Boiler House at Parkwater, Washington, prepared in 1912. Burlington Northern File Number 300-41, Reference Number 10106.

Northern Pacific Engineering Drawing: Boiler House at Parkwater, Washington, prepared in 1912. Burlington Northern File Number 300-41, Reference Number 10103.

Northern Pacific Engineering Drawing: Boiler House at Parkwater, Washington, prepared in 1912. Burlington Northern File Number 300-41, Reference Number 10103, Sheet D-2.

Northern Pacific Engineering Drawing: Boiler House at Parkwater, Washington, prepared in 1912. Burlington Northern File Number , Reference Number 101.

Northern Pacific Engineering Drawing: Boiler House at Parkwater, Washington, prepared in 1912. Burlington Northern File Number , Reference Number 10103.

Northern Pacific Engineering Drawing: Boiler House at Parkwater, Washington, prepared in 1912. Burlington Northern File Number 300-41, Reference Number 10112.

Northern Pacific Engineering Drawing: Boiler House at Parkwater, Washington, prepared in 1912. Burlington Northern File Number 300-41, Reference Number 10103.