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SP - Dumbarton Bridge

Photos 

Dumbarton RR Swing Bridge

Looking SW

Photo taken by Craig Philpott in July 2010

Enlarge

BH Photo #169904

Map 

Street View 

Description 

This bridge was the first bridge to cross San Francisco Bay. It cost 1,500,000 dollars to build (equivalent to $38,000,000 today). It was dedicated on September 24th, 1910. The truss spans were fabricated in Oakland and hauled to site by the ferry "Thoroughfare". In 1982 it was welded in the open position and part of the Palo Alto side was removed; it is currently (2018) abandoned in place.

source "California Drawbridges" Bernard C. Winn

http://trn.trains.com/news/news-wire/2018/06/15-facebook-cou...

Efforts to return the old Southern Pacific Dumbarton rail bridge crossing the southern part of San Francisco Bay to service have taken a major step forward, with a recent negotiating agreement allowing social media giant Facebook to work with an Australian infrastructure investment firm to revitalize that long-dormant rail corridor.

On May 6, Facebook entered into an negotiations with the San Mateo County Transit District to improve the Dumbarton corridor, a 14-mile ex-SP line connecting Union City in the East Bay and Redwood City on the peninsula. That could enable a rail connection with the Altamont Commuter Express — whose Fremont station is about two miles east of the east end of the still-moribund Dumbarton corridor — and with Caltrain in Redwood City.

It hasn’t been established which agency would operate trains over the span, should the rehabilitation occur. Past studies, the oldest dating from the 1990s, have considered shuttle service between Union City or Fremont and Redwood City, as well as “extended” service that included Union City-San Francisco and Union City-San Jose trains.

The rail bridge, opened in 1910, carried SP freight trains between the old Bayshore Yard south of San Francisco and points east, including Sacramento and the San Joaquin Valley. Some passenger trains, including the San Joaquin Daylight, also used it. The last freight train ran over the bridge in 1982, and the bridge has been owned by the transit district since 1994.

[More in article at link.]

Facts 

Overview
Abandoned baltimore through truss bridge over San Francisco Bay on Caltrain
Location
Newark, Alameda County, California, and San Mateo County, California
Status
Abandoned
Future prospects
Owned by San Mateo County Transit District; proposed for rebuilding for commuter rail operation, with possible financial contributions from Facebook, Inc.
History
Built 1910, last used for freight 1982; acquired by San Mateo County Transit District 1994
Builder
- William Hood
Railroads
- San Mateo County Transit District
- Southern Pacific Railroad (SP)
Design
Baltimore through truss swing bridge with three spans of Pratt through truss approach span on each end and extensive deck trestle approaches.
Dimensions
Length of largest span: 316.0 ft.
Total length: 7,528.0 ft. (1.4 mi.)
Deck width: 27.0 ft.
Approximate latitude, longitude
+37.49729, -122.11006   (decimal degrees)
37°29'50" N, 122°06'36" W   (degrees°minutes'seconds")
Approximate UTM coordinates
10/578665/4150412 (zone/easting/northing)
Quadrangle map:
Mountain View
Elevation
11 ft. above sea level
Inventory number
BH 45455 (Bridgehunter.com ID)

Update Log 

  • June 18, 2018: Updated by Alexander D. Mitchell IV: Proposal to rebuild bridge for transit operation linked
  • May 18, 2018: Updated by Leslie R trick: Added info to description
  • January 20, 2017: New photos from Dave King
  • April 16, 2015: New photos from Zachary S
  • October 14, 2013: Updated by Luke Harden: Bridge definitely doomed
  • July 18, 2010: Updated by Craig Philpott: refined design and added photos
  • June 6, 2010: New Street View added by Cliff Darby
  • June 5, 2010: Added by Craig Philpott

Sources 

Comments 

SP Dumbarton Bridge Video Footage
Posted February 18, 2014, by Cat Cook (sales [at] theshortline [dot] com)

I have a customer who is looking for any video footage of Southern Pacific traveling on this bridge. Anyone have any ideas?

Thanks!

Cat

The Short Line

sales@theshortline.com

www.theshortline.com

Dumbarton Railroad Bridge
Posted June 5, 2010, by Craig Philpott (cphilpott [at] puc [dot] edu)

Bing.com has excellent views of this bridge in birds eye view.