Railroad Archives Online
- CollectionD0027 - Timothy Miller Collection
- Series004 - Northern Pacific Railroad Company
- Subseries Level 1009 - Engineering Records
- Subseries Level 2008 - Physical plant drawing
- Subseries Level 3001 - Bridges
- 6117 more...
- ItemBB026977 - Northern Pacific Engineering Drawing: Signal Bridge G, Bridge 0.2 - 4th Avenue Viaduct, Seattle, Washington, undated
- ItemBB026978 - Northern Pacific Engineering Drawing: Stringer Steel Details, Bridge 0.2 - 4th Avenue Viaduct, Seattle, Washington, undated
- ItemBB026979 - Northern Pacific Engineering Drawing: Signal Bridges D and E, Bridge 0.2 - 4th Avenue Viaduct, Seattle, Washington, undated
- ItemBB026980 - Northern Pacific Engineering Drawing: Pole Base Beams 3 and 5, Bridge 0.2 - 4th Avenue Viaduct, Seattle, Washington, undated
- ItemBB026981 - Northern Pacific Engineering Drawing: Deck Slab Revisions, Bridge 0.2 - 4th Avenue Viaduct, Seattle, Washington, 1969
- ItemBB026982 - Northern Pacific Engineering Drawing: Deck Slab Revisions, Bridge 0.2 - 4th Avenue Viaduct, Seattle, Washington, 1969
- ItemBB026983 - Northern Pacific Engineering Drawing: Footings Column 1, Bridge 0.2 - 4th Avenue Viaduct, Seattle, Washington, undated
- ItemBB026984 - Northern Pacific Engineering Drawing: Plan of Piers Timber, Bridge 0.2 - 4th Avenue Viaduct, Seattle, Washington, undated
- ItemBB026985 - Northern Pacific Engineering Drawing: Girder Supporting Fixed Beam 6 - 2, Bridge 0.2 - 4th Avenue Viaduct, Seattle, Washington, undated
- 1602 more...