Railroad Archives Online
- CollectionD0027 - Timothy Miller Collection
- Series003 - Great Northern Railway Company (U.S.)
- Subseries Level 1009 - Engineering Records
- Subseries Level 2008 - Physical plant drawing
- Subseries Level 3001 - Bridges
- 1802 more...
- ItemBB024308 - Great Northern Engineering Drawing: Layout, Bridge 20 - Undercrossing, North of Clayton, Washington, 1938
- ItemBB024309 - Great Northern Engineering Drawing: General Plan, Bridge 20 - Undercrossing, North of Clayton, Washington, 1938
- ItemBB024310 - Great Northern Engineering Drawing: Abutment 1 and 4, Bridge 20 - Undercrossing, North of Clayton, Washington, undated
- ItemBB024311 - Great Northern Engineering Drawing: Abutment 1 - Revision, Bridge 20 - Undercrossing, North of Clayton, Washington, 1938
- ItemBB024312 - Great Northern Engineering Drawing: Piers 2 and 3, Bridge 20 - Undercrossing, North of Clayton, Washington, undated
- ItemBB024313 - Great Northern Engineering Drawing: Girder Spans, Bridge 20 - Undercrossing, North of Clayton, Washington, undated
- ItemBB024314 - Great Northern Engineering Drawing: Miscellaneous Steel Details, Bridge 20 - Undercrossing, North of Clayton, Washington, undated
- ItemBB024315 - Great Northern Engineering Drawing: Deck Slabs, Bridge 20 - Undercrossing, North of Clayton, Washington, undated
- ItemBB024316 - Great Northern Engineering Drawing: Bar List, Bridge 20 - Undercrossing, North of Clayton, Washington, undated
- 2190 more...