3 votes

NWP - Black Point Bridge (1911)


Petaluma River RR bridge

Photo taken by Craig Philpott


BH Photo #177545

Street View 


Warren truss swing bridge with unusual truss configuration that looks to be a mix of Warren truss and Pratt truss diagonal elements.


Warren through truss bridge over Petaluma River on Northwestern Pacific Railroad
Sonoma County, California, and Marin County, California
Open to low emission locomotives and cars carrying animal feed and lumber up north four to five times a week.
Built 1911
- Northwestern Pacific Railroad (NWP)
- Sonoma-Marin Area Rail Transit (SMART)
- Southern Pacific Railroad (SP)
Warren through truss swing bridge with extensive trestle approaches.
Length of largest span: 246.0 ft.
Total length: 1,440.0 ft.
Deck width: 18.0 ft.
Approximate latitude, longitude
+38.11240, -122.50074   (decimal degrees)
38°06'45" N, 122°30'03" W   (degrees°minutes'seconds")
Approximate UTM coordinates
10/543766/4218403 (zone/easting/northing)
Quadrangle map:
11 ft. above sea level
Inventory number
BH 46170 (Bridgehunter.com ID)

Update Log 

  • October 20, 2020: Updated by Luke: Added category "Sonoma-Marin Area Rail Transit"
  • September 4, 2020: New photos from Geoff Hubbs
  • April 11, 2018: New Street View added by Luke
  • October 21, 2016: Updated by Christopher Finigan: Added categories "Petaluma River", "Riveted"
  • August 22, 2013: New photo from Douglas Butler
  • September 21, 2012: New photo from Jann Mayer
  • November 15, 2011: New Street View added by Daniel Hopkins
  • November 14, 2011: Updated by Nathan Holth: Added Construction Date And Updated Status
  • September 13, 2010: Added by Craig Philpott

Related Bridges 


  • Craig Philpott - craigphilpott63 [at] gmail [dot] com
  • Nathan Holth
  • News Article
  • Daniel Hopkins - chimera [at] clovermail [dot] net
  • Jann Mayer - jannmayer [at] gmail [dot] com
  • Douglas Butler
  • Luke
  • Geoff Hubbs


NWP - Black Point Bridge
Posted September 4, 2020, by Michael Dugger (michaeldugger [at] insightfulimagery [dot] com)

Difficult to access. Modern no trespassing sings. I respected the signs and flew in for photos from public areas nearby. A great looking bridge i would love to get on there and touch the metal and smell the railroad on there haha. I love theses old bridges.