Great Northern Engineering Drawing: Power House at Interbay, Washington, prepared in 1933. Burlington Northern File Number 8711, Reference Number 10110, Sheet 207.

Great Northern Engineering Drawing: Power House at Interbay, Washington, prepared in 1931. Burlington Northern File Number 8727-1, Reference Number 10111.

Great Northern Engineering Drawing: Power House at Interbay, Washington, prepared in 1929. Burlington Northern File Number 8727-8, Reference Number 10102, Sheet 002.

Great Northern Engineering Drawing: Power House at Interbay, Washington, prepared in 1929. Burlington Northern File Number 8727-14, Reference Number 10102, Sheet 008.

Great Northern Engineering Drawing: Power House at Interbay, Washington, prepared in 1929. Burlington Northern File Number 8727-16, Reference Number 10102, Sheet 010.

Great Northern Engineering Drawing: Power House at Interbay, Washington, prepared in 1929. Burlington Northern File Number 8727-5, Reference Number 10101.

Great Northern Engineering Drawing: Power House at Interbay, Washington, prepared in 1929. Burlington Northern File Number 8727-9, Reference Number 10106, Sheet 003.

Great Northern Engineering Drawing: Power House at Interbay, Washington, prepared in 1929. Burlington Northern File Number 8727-13, Reference Number 10102, Sheet 007.

Great Northern Engineering Drawing: Power House at Interbay, Washington, prepared in 1929. Burlington Northern File Number 8727-15, Reference Number 10102, Sheet 009.

Great Northern Engineering Drawing: Power House at Interbay, Washington, prepared in 1929. Burlington Northern File Number 8727-7, Reference Number 10102, Sheet 001.