Railroad Archives Online
- FondD0027 - Timothy Miller Collection
- Sorozat004 - Northern Pacific Railroad Company
- Alsorozat009 - Engineering Records
- 008 - Physical plant drawing
- 007 - Track
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- IratdarabBB032571 - Northern Pacific Engineering Drawing: Shop Plan - Pit Modifications, Track Scale, Centralia, Washington, undated
- IratdarabBB032572 - Northern Pacific Engineering Drawing: General Installation Notes, Track Scale, Centralia, Washington, undated
- IratdarabBB032573 - Northern Pacific Engineering Drawing: General Plan, Track Scale, Spokane, Washington, undated
- IratdarabBB032574 - Northern Pacific Engineering Drawing: Approach Slab Details, Track Scale, Spokane, Washington, undated
- IratdarabBB032575 - Northern Pacific Engineering Drawing: Pit Details, Track Scale, Spokane, Washington, undated
- IratdarabBB032576 - Northern Pacific Engineering Drawing: Sump Details and Bill of Material, Track Scale, Spokane, Washington, undated
- IratdarabBB032577 - Northern Pacific Engineering Drawing: Shop Plan - Installation Detail, Track Scale, Spokane, Washington, undated
- IratdarabBB032578 - Northern Pacific Engineering Drawing: Shop Plan - Field Cables, Track Scale, Spokane, Washington, undated
- IratdarabBB032579 - Northern Pacific Engineering Drawing: Shop Plan - Field Cables, Track Scale, Spokane, Washington, undated
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