2 votes

Rockfield Bridge


Rockfield Bridge, Victorville

Looking SW

Photo taken by Craig Philpott in April 2010


BH Photo #163473

Street View 


Baltimore variant through truss bridge over Mojave River on Nat Trails Hwy (old US 66)
Victorville, San Bernardino County, California
Open to traffic
Built 1930
Baltimore variant through truss
Length of largest span: 270.0 ft.
Total length: 575.2 ft.
Deck width: 34.1 ft.
Eligible for the National Register of Historic Places
Also called
Route 66 Bridge
Oro Grande Bridge
Approximate latitude, longitude
+34.57395, -117.32268   (decimal degrees)
34°34'26" N, 117°19'22" W   (degrees°minutes'seconds")
Approximate UTM coordinates
11/470402/3825844 (zone/easting/northing)
Quadrangle map:
Average daily traffic (as of 2014)
Inventory number
BH 44834 (Bridgehunter.com ID)
Inspection report (as of January 2018)
Overall condition: Fair
Superstructure condition rating: Fair (5 out of 9)
Substructure condition rating: Fair (5 out of 9)
Deck condition rating: Good (7 out of 9)
Sufficiency rating: 62 (out of 100)
View more at BridgeReports.com

Update Log 

  • July 3, 2022: New photo from Geoff Hubbs
  • July 5, 2020: New photos from Patrick Gurwell
  • May 25, 2019: New photos from Joe Sonderman
  • May 26, 2016: Updated by Roger Deschner: Added category "US 66"
  • July 8, 2015: New photos from Michael Shulman
  • September 4, 2014: New photos from Royce and Bobette Haley
  • January 31, 2013: New photos from Jann Mayer
  • August 3, 2012: New photo from David Backlin
  • April 24, 2010: Updated by Craig Philpott: refined design description
  • April 22, 2010: New photos from Craig Philpott
  • April 11, 2010: Updated by Craig Philpott: refined design, added street view, more design assistance needed


  • Craig Philpott - craigphilpott63 [at] gmail [dot] com
  • David Backlin - us71 [at] cox [dot] net
  • Jann Mayer - jannmayer [at] gmail [dot] com
  • Royce and Bobette Haley - roycehaley111 [at] yahoo [dot] com
  • Michael Shulman - mikeifish [at] aol [dot] com
  • Joe Sonderman
  • Patrick Gurwell - pgurwell [at] gmail [dot] com
  • Geoff Hubbs


Rockfield Bridge
Posted April 22, 2010, by Nathan Holth (form3 [at] historicbridges [dot] org)

Over on HistoricBridges.org, I call these modified Warrens because while they appear similar to Baltimore truss bridges, they use Warren config for the primary diagonals as opposed to the Pratt. A Baltimore is by definition a variation of a Pratt.

I don't know what the general consensus is here on BridgeHunter for this type. There was a discussion about weird truss types a while back:


Rockfield Bridge, design description needed
Posted April 22, 2010, by Craig Philpott (cphilpott [at] puc [dot] edu)

This through truss in San Bernardino county is an unusual design, to me, and it needs a better design description. All assistance and education appreciated.