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
- 3371 more...
- ItemBB017957 - Northern Pacific Engineering Drawing: Map/Track Profile, Bridge 70.1 - Helena Street, Spokane, Washington, undated
- ItemBB017958 - Northern Pacific Engineering Drawing: Section Proposed Bridge/Profile, Bridge 70.1 - Helena Street, Spokane, Washington, undated
- ItemBB017959 - Northern Pacific Engineering Drawing: General Design Proposed Bridge, Bridge 70.1 - Helena Street, Spokane, Washington, undated
- ItemBB017960 - Northern Pacific Engineering Drawing: General Plan/Helena Street, Bridge 70.1 - Helena Street, Spokane, Washington, 1916
- ItemBB017961 - Northern Pacific Engineering Drawing: Detail of Bents, Bridge 70.1 - Helena Street, Spokane, Washington, undated
- ItemBB017962 - Northern Pacific Engineering Drawing: Detail of Slabs, Bridge 70.1 - Helena Street, Spokane, Washington, undated
- ItemBB017963 - Northern Pacific Engineering Drawing: Detail of Rail, etc., Bridge 70.1 - Helena Street, Spokane, Washington, undated
- ItemBB017964 - Northern Pacific Engineering Drawing: West Abutment, Bridge 70.1 - Helena Street, Spokane, Washington, undated
- ItemBB017965 - Northern Pacific Engineering Drawing: East Abutment, Bridge 70.1 - Helena Street, Spokane, Washington, undated
- 4348 more...