Historic Bridges of the U.S. | Seventh Street over the Los Angeles Rivers

Overview

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Photos

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Seventh Street Bridge

Southward view from the riverbed beneath the Sixth Street Bridge

www.bridges-of-los-angeles-county.com

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Deck and Ballustrade from west end

Eastward view from sidewalk

www.youtube.com/users/bridgesoflosangeles

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Detail of the Seventh Street Bridge

Northeast view from the deck of the bridge

http://eng.lacity.org/projects/bridge/historical_gallery/

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Construction Plans

http://eng.lacity.org/projects/bridge/historical_gallery/index.htm

Los Angeles City Bureau of Engineering

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The Singe Double Decked Bridge

Written by David Kimbrough

This bridge was built in two stages. In 1910 the lower level was built at grade to allow trolleys across the river, which was unlined and much lower than now due to the LA River being on open quarry for aggregate mining. In in mid-1920's it was decided to raise the bridge above grade as the trolley and automobile traffic was at 90o to the freight traffic going north south. Rather than demolish the bridge, they simply built on top of the existing bridge. The second deck is above the first and the same columns were used. Despite appearances, it is not a true double decked bridge as the lower deck is not connected to either bank. All traffic goes on the top deck.

http://eng.lacity.org/projects/bridge/historical_gallery/

www.preservela.com/index.php?option=com_content&task=view&id=241&Itemid=37

www.bridges-of-los-angeles-county.com

www.youtube.com/users/bridgesoflosangeles

Facts

Overview: Concrete arch bridge over Los Angeles River on Seventh Street in Los Angeles
Location: Los Angeles, Los Angeles County, California
Status: Open to traffic
History: Built 1910, Second Deck added 1927, Seismic Retrofit 1995
Builders: - Lang & Bergstrom
- Merrill Butler
Design: Arch
Dimensions: Length of largest span: 91.9 ft.
Total length: 1,000.0 ft.
Deck width: 56.1 ft.
Recognition: Eligible for the National Register of Historic Places
Approximate latitude, longitude: +34.03444, -118.22639 (decimal degrees)
34°02'04" N, 118°13'35" W (degrees°minutes'seconds")
Approximate UTM coordinates: 11/386788/3766653 (zone/easting/northing)
USGS topographic map: Los Angeles
Inventory numbers: CA 53C-1321 (California bridge number)
BH 11044 (Bridgehunter.com ID)
Inspection (as of 04/2005): Deck condition rating: Good (7 out of 9)
Superstructure condition rating: Good (7 out of 9)
Substructure condition rating: Good (7 out of 9)
Sufficiency rating: 90.4 (out of 100)
Average daily traffic (as of 2000): 25,000