Railroad Archives Online
- FondsD0027 - Timothy Miller Collection
- Cyfres004 - Northern Pacific Railroad Company
- Is-gyfres009 - Engineering Records
- 008 - Physical plant drawing
- 001 - Bridges
- 1619 mwy...
- EitemBB016053 - Northern Pacific Engineering Drawing: Elevation Near Truss, Bridge 100 (133) - Coweman River, South of Kelso, Washington, undated
- EitemBB016055 - Northern Pacific Engineering Drawing: Tie Plan, Bridge 100 (133) - Coweman River, South of Kelso, Washington, 1965
- EitemBB016056 - Northern Pacific Engineering Drawing: Tie Plan, Bridge 100 (133) - Coweman River, South of Kelso, Washington, 1945
- EitemBB016057 - Northern Pacific Engineering Drawing: Detail of Stringer/Lateral, Bridge 100 (133) - Coweman River, South of Kelso, Washington, undated
- EitemBB016058 - Northern Pacific Engineering Drawing: Floor Beam/Portal, Bridge 100 (133) - Coweman River, South of Kelso, Washington, undated
- EitemBB016059 - Northern Pacific Engineering Drawing: General Plan, Bridge 100 (133) - Coweman River, South of Kelso, Washington, 1910
- EitemBB016060 - Northern Pacific Engineering Drawing: Fixed End/Expansion Bearings, Bridge 100 (133) - Coweman River, South of Kelso, Washington, undated
- EitemBB016061 - Northern Pacific Engineering Drawing: General Plan/Detail Masonry, Bridge 59 - Newaukum River, South of Chehalis Junction, Washington, 1899
- EitemBB016062 - Northern Pacific Engineering Drawing: Detail of Pier/Abutment, Bridge 59 - Newaukum River, South of Chehalis Junction, Washington, undated
- 6100 mwy...