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
- 3205 more...
- ItemBB017783 - Northern Pacific Engineering Drawing: Details of Timber, Bridge 11.1 - Mercer Slough, South of Wilburton, Washington, undated
- ItemBB017784 - Northern Pacific Engineering Drawing: Proposed Road Underpass, Bridge 11.1 - Mercer Slough, South of Wilburton, Washington, undated
- ItemBB017785 - Northern Pacific Engineering Drawing: Proposed Pile Bent, Bridge 11.1 - Mercer Slough, South of Wilburton, Washington, undated
- ItemBB017786 - Northern Pacific Engineering Drawing: Schedule of Drawings, Bridge 11.1 - Mercer Slough, South of Wilburton, Washington, undated
- ItemBB017788 - Northern Pacific Engineering Drawing: Construction Sequence 1, Bridge 11.1 - Mercer Slough, South of Wilburton, Washington, undated
- ItemBB017789 - Northern Pacific Engineering Drawing: Construction Sequence 2, Bridge 11.1 - Mercer Slough, South of Wilburton, Washington, undated
- ItemBB017790 - Northern Pacific Engineering Drawing: Tie Layout and Other Details, Bridge 11.1 - Mercer Slough, South of Wilburton, Washington, undated
- ItemBB017791 - Northern Pacific Engineering Drawing: Piers, Bridge 11.1 - Mercer Slough, South of Wilburton, Washington, undated
- ItemBB017792 - Northern Pacific Engineering Drawing: Plate Girders, Bridge 11.1 - Mercer Slough, South of Wilburton, Washington, undated
- 4514 more...