AFE 6110, Cape Horn, Washington, 1936. Move Eastound Signal at Cape Horn Tunnel. Interstate Commerce Commission Account Number 27 Signals and Interlockers Cost: $405. Series . Lines West. Other Subject Categories: Signals, Other

AFE 6387, Cape Horn, Washington, 1938. Widen Shoulder of Fill Just East of Cape Horn Tunnel #1. Interstate Commerce Commission Account Number 3 Grading Cost: $3500. Series . Lines West. Other Subject Categories: Track Maintenance, Ballast

Spokane, Portland and Seattle Railway Authorization for Expenditure (AFE). President's AFE Number 17. Fencing both sides of right of way at Cape Horn, Washington. Chief Engineer/Standard Maintenance Procedure AFE Number CE 3. Correspondence File Number 13-1. Vancouver Division. Other subject categories: Fencing.

Spokane, Portland and Seattle Railway Authorization for Expenditure (AFE), Cape Horn, Washington, 1912.

Spokane, Portland and Seattle Railway Authorization for Expenditure (AFE). President's AFE Number 1165. Placing two old car bodies to be used for depot at Cape Horn, Washington. Correspondence File Number 381. Vancouver Division. Other subject categories: Structure Depot.

Spokane, Portland and Seattle Railway Authorization for Expenditure (AFE). President's AFE Number 1284. Provide roadway to new location of a station at Cape Horn, Washington. Chief Engineer/Standard Maintenance Procedure AFE Number CE 1390. Correspondence File Number 381. Vancouver Division. Other subject categories: Road Roadway.