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Spokane, Portland and Seattle Railway Authorization for Expenditure (AFE). President's AFE Number 374. Transforming Northern Pacific steam locomotives #232 and #233 into oil burners. Chief Engineer/Standard Maintenance Procedure AFE Number MM-27. Correspondence File Number 6-0043. Other subject categories: Locomotives Steam.

Spokane, Portland and Seattle Railway Authorization for Expenditure (AFE). President's AFE Number 265. Repairs to SP&S car X-20. Chief Engineer/Standard Maintenance Procedure AFE Number SMP 12. Correspondence File Number SMP 51. Other subject categories: Cars Work.

Spokane, Portland and Seattle Railway Authorization for Expenditure (AFE). President's AFE Number 324. Converting two cinder cars into SP&S cabooses. Chief Engineer/Standard Maintenance Procedure AFE Number SMP 23. Correspondence File Number 6-0029. Other subject categories: Cars Work Cars Caboose.

Spokane, Portland and Seattle Railway Authorization for Expenditure (AFE). President's AFE Number 397. Converting Northern Pacific steam locomotives #232 and #233 from oil to coal burners. Chief Engineer/Standard Maintenance Procedure AFE Number SMP 17. Correspondence File Number 6-0049. Other subject categories: Locomotives Steam.

Spokane, Portland and Seattle Railway Authorization for Expenditure (AFE), Equipment, , 1911.

Spokane, Portland and Seattle Railway Authorization for Expenditure (AFE), Equipment, , 1911.

Spokane, Portland and Seattle Railway Authorization for Expenditure (AFE), Equipment, , 1911.

Spokane, Portland and Seattle Railway Authorization for Expenditure (AFE). President's AFE Number 216. Purchase of twenty, 12,500 gallon oil tank cars. Chief Engineer/Standard Maintenance Procedure AFE Number SMP 11. Correspondence File Number SMP 51. Other subject categories: Cars Freight.

Spokane, Portland and Seattle Railway Authorization for Expenditure (AFE). President's AFE Number 216.5. Purchase of ten, 12,500 gallon oil tank cars for Oregon Trunk Railway. Chief Engineer/Standard Maintenance Procedure AFE Number SMP. Correspondence File Number SMP T51. Other subject categories: Cars Freight.

Spokane, Portland and Seattle Railway Authorization for Expenditure (AFE). President's AFE Number 196. Equipping Astoria & Columbia River Railroad car with oil tanks. Chief Engineer/Standard Maintenance Procedure AFE Number 248. Correspondence File Number SMP 51. Other subject categories: Cars Passenger ?.