Northern Pacific Engineering Drawing: Waybill and Telephone Building at Longview Junction, Washington, prepared in 1968. Burlington Northern File Number 5200, Reference Number 10104, Sheet 001.

Northern Pacific Engineering Drawing: Signal Maintainer's Tool House at Alaskan Way near Bell Street in Seattle, Washington, prepared in 1945. Burlington Northern File Number 4848, Reference Number 10111.

Northern Pacific Engineering Drawing: Signal Maintainer's Tool House at Alaskan Way near Bell Street in Seattle, Washington, prepared in 1945. Burlington Northern File Number 4848, Reference Number 10111.

Northern Pacific Engineering Drawing: Replace Steel Bents, Signal Bridge, Tacoma, Washington, Line Segment 051, Milepost 39.73. Sheet 131170, undated.

Northern Pacific Engineering Drawing: 3 - Track Signal Bridge, Signal Bridge, Tacoma, Washington, Line Segment 051, Milepost 39.73. Sheet 424 - 4, undated.

Great Northern Engineering Drawing: Signal Maintainer's Tool House at Bellingham, Washington, prepared in 1946. Burlington Northern File Number 9418, Reference Number 10108.

Great Northern Engineering Drawing: Signal Maintainers House Plan and Electrical at Scenic, Washington, prepared in 1970. Burlington Northern File Number 9138-E1, Reference Number 10107.

Great Northern Engineering Drawing: Signal Maintainers House at Scenic, Washington, prepared in 1970. Burlington Northern File Number 9138-3, Reference Number 10106.