+38.53361, -121.47222
38°32'01" N, 121°28'20" W
Source: National Bridge Inventory
Information not verified. Use at your own risk.


Name:STATE ROUTE 99 over 21ST AVE
Structure number:24 0154
Purpose:Carries highway over highway
Route classification:Principal Arterial - Other Freeways or Expressways (Urban) [12]
Length of largest span:48.9 ft. [14.9 m]
Total length:50.9 ft. [15.5 m]
Roadway width between curbs:133.9 ft. [40.8 m]
Deck width edge-to-edge:139.8 ft. [42.6 m]
Vertical clearance below bridge:15.1 ft. [4.6 m]
Skew angle:23°
Owner:State Highway Agency [01]
Year built:1959
Year reconstructed:1974
Historic significance:Bridge is not eligible for the National Register of Historic Places [5]
Design load:MS 18 / HS 20 [5]
Main span material:Concrete [1]
Main span design:Slab [01]
Deck type:Concrete Cast-in-Place [1]
Wearing surface:Integral Concrete (separate non-modified layer of concrete added to structural deck) [2]

Latest Available Inspection: February 2016 

Good/Fair/Poor Condition:Fair
Status:Open, no restriction [A]
Average daily traffic:193,000 [as of 2009]
Truck traffic:5% of total traffic
Deck condition:Fair [5 out of 9]
Superstructure condition:Satisfactory [6 out of 9]
Substructure condition:Good [7 out of 9]
Structural appraisal:Equal to present minimum criteria [6]
Deck geometry appraisal:Meets minimum tolerable limits to be left in place as is [4]
Underclearances appraisal:Meets minimum tolerable limits to be left in place as is [4]
Roadway alignment appraisal:Equal to present desirable criteria [8]
Scour condition:Bridge not over waterway. [N]
Operating rating:88.8 tons [80.7 metric tons]
Inventory rating:35.6 tons [32.4 metric tons]
Sufficiency rating:75.0

Previous Inspections 

DateSuff. RatingConditionDeckSuperstructureSubstructureSD/FOADT
February 201675.0FairFairSatisfactoryGood-193000
February 201475.0FairFairSatisfactoryGood-193000
February 201275.0FairFairSatisfactoryGood-193000
April 201075.0FairFairSatisfactoryGood-205000
July 200871.0PoorSeriousSatisfactoryGoodSD205000
May 200671.0PoorSeriousSatisfactoryGoodSD205000
February 200473.0PoorPoorSatisfactoryGoodSD156700
February 200276.0FairSatisfactorySatisfactoryGood-156700
July 199876.0FairSatisfactorySatisfactoryGood-156700
November 199678.0FairSatisfactorySatisfactoryGood-156700
August 199480.0FairFairGoodGoodFO154600
November 199280.0FairFairGoodGoodFO171200
March 199080.0FairFairGoodGoodFO171200