Spokane, Portland and Seattle Railway Authorization for Expenditure (AFE). President's AFE Number 8. 1000 foot side track at Cascades, Washington. Correspondence File Number 357-1. Vancouver Division. Other subject categories: Tracks Side.

Spokane, Portland and Seattle Railway Authorization for Expenditure (AFE). President's AFE Number 1432. Construct passing track 3124 feet in length at Cascades, Washington, and extending passing track 1203 feet at Hood, Washington, account insufficient passing track facilities in this vicinity. Chief Engineer/Standard Maintenance Procedure AFE Number CE 1527. Correspondence File Number 65-1. Vancouver Division. Other subject categories: Tracks Passing.

Spokane, Portland and Seattle Railway Authorization for Expenditure (AFE), Cascades Harbin, Washington, undated.