+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:141.7 ft. [43.2 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 

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. ratingEvaluationDeckSuper.Sub.ADT
February 201675.0Not deficientFairSatisfactoryGood193000
February 201475.0Not deficientFairSatisfactoryGood193000
February 201275.0Not deficientFairSatisfactoryGood193000
April 201075.0Not deficientFairSatisfactoryGood205000
July 200871.0Structurally deficientSeriousSatisfactoryGood205000
May 200671.0Structurally deficientSeriousSatisfactoryGood205000
February 200473.0Structurally deficientPoorSatisfactoryGood156700
February 200276.0Not deficientSatisfactorySatisfactoryGood156700
July 199876.0Not deficientSatisfactorySatisfactoryGood156700
November 199678.0Not deficientSatisfactorySatisfactoryGood156700
August 199480.0Functionally obsoleteFairGoodGood154600
November 199280.0Functionally obsoleteFairGoodGood171200
March 199080.0Functionally obsoleteFairGoodGood171200