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OAK KNOLL AVE over NAPA RIVER OVERFLOW

Map

Coordinates:
+38.36794, -122.30388
38°22'05" N, 122°18'14" W

Facts

Source: National Bridge Inventory. Information not verified; use at your own risk.
Name:OAK KNOLL AVE over NAPA RIVER OVERFLOW
Structure number:21C0068
Location:0.35 MI SW SLVRDO TRAIL
Purpose:Carries highway over waterway
Route classification:Major Collector (Rural) [07]
Length of largest span:19.0 ft. [5.8 m]
Total length:40.0 ft. [12.2 m]
Roadway width between curbs:21.3 ft. [6.5 m]
Deck width edge-to-edge:24.0 ft. [7.3 m]
Owner:County Highway Agency [02]
Year built:1930
Historic significance:Bridge is not eligible for the National Register of Historic Places [5]
Number of main spans:2
Main spans material:Concrete continuous [2]
Main spans design:Tee beam [04]
Deck type:Concrete Cast-in-Place [1]
Wearing surface:Bituminous [6]

Latest Available Inspection: May 2015

Good/Fair/Poor Condition:Good
Status:Open, no restriction [A]
Average daily traffic:2,600 [as of 2005]
Truck traffic:10% of total traffic
Deck condition:Very Good [8 out of 9]
Superstructure condition:Good [7 out of 9]
Substructure condition:Good [7 out of 9]
Structural appraisal:Better than present minimum criteria [7]
Deck geometry appraisal:Basically intolerable requiring high priority of replacement [2]
Water adequacy appraisal:Equal to present desirable criteria [8]
Roadway alignment appraisal:Somewhat better than minimum adequacy to tolerate being left in place as is [5]
Channel protection:Bank is beginning to slump. River control devices and embankment protection have widespread minor damage. There is minor stream bed movement evident. Debris is restricting the channel slightly. [6]
Scour condition:Bridge foundations determined to be stable for assessed or calculated scour condition. [5]
Sufficiency rating:75.4
Recommended work:Other structural work, including hydraulic replacements. [38]
Estimated cost of work:$142,000

Previous Inspections

DateConditionDeckSuperstructureSubstructureADTSuff. Rating
May 2015GoodVery GoodGoodGood260075.4
November 2013FairGoodFairSatisfactory260066.1
October 2011FairGoodFairSatisfactory260057.2
December 2009FairGoodFairSatisfactory260057.2
October 2007FairGoodFairSatisfactory260057.2
November 2005FairSatisfactoryFairSatisfactory260057.2
October 2003FairGoodSatisfactorySatisfactory112569.7
October 2001FairGoodSatisfactorySatisfactory112569.7
September 2000FairGoodSatisfactorySatisfactory112567.7
November 1999FairGoodSatisfactorySatisfactory112567.7
September 1997FairGoodSatisfactoryGood112567.7
January 1996FairSatisfactorySatisfactorySatisfactory112567.4
March 1994FairSatisfactorySatisfactorySatisfactory112567.4
February 1992FairSatisfactorySatisfactorySatisfactory112561.7