Rating:
2 votes

Stanislaus River Bridge

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Stanislaus River Hwy 99 SB San Joaquin Co

1903 arch

Photo taken by Craig Philpott

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Facts 

Overview
Concrete arch bridge over Stanislaus River on Southbound CA 99 in Ripon
Location
San Joaquin County, California, and Stanislaus County, California
Status
Open to traffic
History
Built 1908; rehabilitated 1967
Builder
- John B. Leonard of Union City, Michigan (Engineer)
Design
Historic two span concrete closed spandrel arch, engineered by John B. Leonard, integrated into 1960's freeway bridge with addition of expanded concrete abutments and steel deck plate girders.
Dimensions
Length of largest span: 100.1 ft.
Total length: 1,219.9 ft.
Deck width: 46.9 ft.
Approximate latitude, longitude
+37.73000, -121.11000   (decimal degrees)
37°43'48" N, 121°06'36" W   (degrees°minutes'seconds")
Approximate UTM coordinates
10/666551/4177539 (zone/easting/northing)
Quadrangle map:
Salida
Inventory numbers
CA 29-13L (California bridge number)
BH 11440 (Bridgehunter.com ID)
Inspection (as of 12/2012)
Deck condition rating: Satisfactory (6 out of 9)
Superstructure condition rating: Poor (4 out of 9)
Substructure condition rating: Good (7 out of 9)
Appraisal: Structurally deficient
Sufficiency rating: 41.6 (out of 100)
Average daily traffic (as of 2009)
53,500

Update Log 

  • April 23, 2013: Updated by Craig Philpott: added original bridge engineer and corrected date.
  • March 31, 2012: Updated by Craig Philpott: refined description and added photos
  • September 21, 2010: New Street View added by Craig Philpott
  • February 18, 2010: Updated by Craig Philpott: Added second county to location

Sources