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

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

Northern Pacific Engineering Drawing: Shop Plan - Cant Post, Signal Bridge, Missoula, Montana, Line Segment 042. Sheet 317 - 6475, undated.

Northern Pacific Engineering Drawing: Signal Maintainer Car House at Sela, Washington, prepared in 1953. Burlington Northern File Number 5279, Reference Number 10107, Sheet 001.

Northern Pacific Engineering Drawing: Signal Maintainer's Dwelling at Garrison, Montana, prepared in 1954. Burlington Northern File Number 4738, Reference Number 10105, Sheet 002.

Northern Pacific Engineering Drawing: Signal Maintainer's Dwelling at Garrison, Montana, undated. Burlington Northern File Number 4738, Reference Number 101.

Northern Pacific Engineering Drawing: Signal Maintainer's Dwelling at Garrison, Montana, undated. Burlington Northern File Number 4738, Reference Number 101, Sheet 002.

Northern Pacific Engineering Drawing: Signal Maintainers House Toilet and Water Facilities at Manitoba Junction, Minnesota, prepared in 1953. Burlington Northern File Number 4960, Reference Number 10111, Sheet 002.

Northern Pacific Engineering Drawing: Signal Maintainers House Toilet and Water Facilities at Manitoba Junction, Minnesota, prepared in 1954. Burlington Northern File Number 4960, Reference Number 10104, Sheet 003.