2 votes

NWP - Cain Rock Bridge


Eel River RR bridge

Photo taken by Craig Philpott in January 2010


BH Photo #152812



Pratt and Warren through truss bridge over Eel River on Northwestern Pacific Railroad
Humboldt County, California
Closed to all traffic
Built 1910; 2 northern spans lost during 1964 flood and replaced.
- American Bridge Co. of New York (1910 Fabricator)
- Willits & Burr Co. of San Francisco, California (1910 Contractor)
- Eureka Southern Railroad (EUKA)
- Northwestern Pacific Railroad (NWP)
- Southern Pacific Railroad (SP)
Four through trusses, comprised of three different apparent ages and two designs, both Pratt and Warren trusses are included.
Length of largest span: 222.0 ft.
Total length: 770.0 ft.
Deck width: 18.0 ft.
Skew angle
45 degrees
Approximate latitude, longitude
+40.35364, -123.91709   (decimal degrees)
40°21'13" N, 123°55'02" W   (degrees°minutes'seconds")
Approximate UTM coordinates
10/422122/4467412 (zone/easting/northing)
Quadrangle map:
167 ft. above sea level
Inventory number
BH 43911 (Bridgehunter.com ID)

Update Log 

  • October 20, 2020: Updated by Luke: Added categories "Great Redwood Trail", "Eel River"
  • January 1, 2017: Updated by Luke: Added builders
  • June 10, 2016: Updated by Christopher Finigan: Added category "Pin-connected"
  • September 10, 2014: New photos from Royce and Bobette Haley
  • July 30, 2014: Updated by Luke: Added RR nickname
  • October 3, 2010: New photos from Craig Philpott
  • February 17, 2010: Updated by Craig Philpott: Corrected truss design description
  • January 18, 2010: Added by Craig Philpott

Related Bridges 


  • Craig Philpott - craigphilpott63 [at] gmail [dot] com
  • Luke
  • Royce and Bobette Haley - roycehaley111 [at] yahoo [dot] com


NWP - Cain Rock Bridge
Posted March 15, 2017, by Rod Todd (tdranch [at] charter [dot] net)

Oops again. I see what you did there: your Alderpoint Bridge IS the Cain Rock Bridge.

NWP - Cain Rock Bridge
Posted March 15, 2017, by Rod Todd (tdranch [at] charter [dot] net)

Oops, Cain Rock Bridge is SOUTH of Alderpoint, CA. Upstream, yes.

NWP - Cain Rock Bridge
Posted March 15, 2017, by Rod Todd (tdranch [at] charter [dot] net)

I believe info and photo here is for the downstream Eel River Bridge,not Cain Rock Bridge. Neat website! No Cain Rock Bridge info? You can see it on Google Earth by searching for Alderpoint, CA then panning a few miles north, upriver. Td