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
- 3198 more...
- ItemBB017776 - Northern Pacific Engineering Drawing: Trestle Bridge, Bridge 11.1 - Mercer Slough, South of Wilburton, Washington, undated
- ItemBB017777 - Northern Pacific Engineering Drawing: Trestle Bridge, Bridge 11.1 - Mercer Slough, South of Wilburton, Washington, undated
- ItemBB017778 - Northern Pacific Engineering Drawing: Rearrangement Bents, Bridge 11.1 - Mercer Slough, South of Wilburton, Washington, undated
- ItemBB017779 - Northern Pacific Engineering Drawing: General Plan - Bent Details, Bridge 11.1 - Mercer Slough, South of Wilburton, Washington, undated
- ItemBB017780 - Northern Pacific Engineering Drawing: Details of Bent, Bridge 11.1 - Mercer Slough, South of Wilburton, Washington, undated
- ItemBB017781 - Northern Pacific Engineering Drawing: Bill of Material, Bridge 11.1 - Mercer Slough, South of Wilburton, Washington, undated
- ItemBB017782 - Northern Pacific Engineering Drawing: Details of Timber, Bridge 11.1 - Mercer Slough, South of Wilburton, Washington, undated
- 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
- 4521 more...