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Oak Grove Drive Bridge

Photos 

Oak Grove Drive & Old Devil's Gate Dam - 1901

A photograph of the Oak Grove Bridge over the old Devil's Gate Dam from January 1901.

Photo taken by Ramsey of Pasadena

Enlarge

BH Photo #196712

Map 

Description 

Devil's Gate is the narrow gorge where the Arroyo Seco comes crashing down out of the San Gabriel Mountains. Just to the east by 100 m Flint Canyon creek enters the Arroyo Seco. In 1896 a bridge was built across both the Arroyo Seco and Flint Canyon Creek carrying Oak Grove Drive (Oak Grove Park, now Hahamongna Watershed Park, is on the west side of the Arroyo). A large flood control dam was built just to the south of the bridge with a road on top which carried Oak Grove Drive. The original bridge was demolished not long after the dam was completed. From about 1920 to 1955 Oak Grove traffic went over the top of the dam. In 1955 a second Oak Grove Bridge was built just to the south of the dam and traffic was moved off of the dam and back to a separate bridge. The bases for the piers of the original bridge are still in place and used for anchors for booms to control debris.

Facts 

Overview
Beam bridge over Arroyo Seco on Oak Grove Drive
Location
Pasadena, Los Angeles County, California
Status
Open to traffic
History
Original bridge built 1896; New bridge added in 1955
Design
Beam
Dimensions
Length of largest span: 141.1 ft.
Total length: 420.0 ft.
Deck width: 56.8 ft.
Approximate latitude, longitude
+34.18499, -118.17397   (decimal degrees)
34°11'06" N, 118°10'26" W   (degrees°minutes'seconds")
Approximate UTM coordinates
11/391819/3783289 (zone/easting/northing)
Quadrangle map:
Altadena
Average daily traffic (as of 2012)
6,131
Inventory numbers
CA 53C-1829 (California bridge number)
BH 48263 (Bridgehunter.com ID)
Inspection report (as of July 2016)
Overall condition: Fair
Superstructure condition rating: Satisfactory (6 out of 9)
Substructure condition rating: Good (7 out of 9)
Deck condition rating: Fair (5 out of 9)
Sufficiency rating: 79.8 (out of 100)
View more at BridgeReports.com

Update Log 

  • October 26, 2012: Updated by David Kimbrough: Include new name of park.
  • August 1, 2011: Updated by David Kimbrough: Added a more definitive date of construction for the first bridge.
  • April 1, 2011: Updated by David Kimbrough: A new photo was added and construction dates were changed.
  • February 26, 2011: Added by David Kimbrough

Sources 

Comments 

Oak Grove Drive over the Arroyo Seco - Devil's Gate Dam
Posted August 1, 2011, by Craig Philpott (cphilpott [at] puc [dot] edu)

David, you have done a great job pulling together the several stages of construction in this location. Zooming by on the 210 hwy it is easy to overlook the history right next to the freeway.