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 8727-10, Reference Number 10102, Sheet 004.

Great Northern Engineering Drawing: Power House at Interbay, Washington, prepared in 1929. Burlington Northern File Number 8727-11, Reference Number 10102, Sheet 005.

Great Northern Engineering Drawing: Power House at Interbay, Washington, prepared in 1929. Burlington Northern File Number 8727-12, Reference Number 10102, Sheet 006.

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

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 1933. Burlington Northern File Number 8711, Reference Number 10109, Sheet 207.

Great Northern Engineering Drawing: Power House at Interbay, Washington, prepared in 1933. Burlington Northern File Number 8711, Reference Number 10109, Sheet 207.

Great Northern Engineering Drawing: Power House at Interbay, Washington, prepared in 1933. Burlington Northern File Number 8711, Reference Number 10109, Sheet 207.

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