US 101 NB over I 405 & N101-S405 RAMP


+34.16094, -118.46930
34°09'39" N, 118°28'09" W


Source: National Bridge Inventory. Information not verified; use at your own risk.
Name:US 101 NB over I 405 & N101-S405 RAMP
Structure number:53 1146R
Purpose:Carries highway over highway
Route classification:Principal Arterial - Other Freeways or Expressways (Urban) [12]
Length of largest span:89.9 ft. [27.4 m]
Total length:213.9 ft. [65.2 m]
Roadway width between curbs:69.9 ft. [21.3 m]
Deck width edge-to-edge:73.8 ft. [22.5 m]
Vertical clearance below bridge:13.1 ft. [4.0 m]
Skew angle:40°
Owner:State Highway Agency [01]
Year built:1958
Year reconstructed:1971
Historic significance:Bridge is not eligible for the National Register of Historic Places [5]
Design load:MS 18 / HS 20 [5]
Number of main spans:3
Main spans material:Concrete continuous [2]
Main spans design:Box beam or girders - Multiple [05]
Deck type:Concrete Cast-in-Place [1]
Wearing surface:Monolithic Concrete (concurrently placed with structural deck) [1]

Latest Available Inspection: March 2018

Good/Fair/Poor Condition:Fair
Status:Open, no restriction [A]
Average daily traffic:229,750 [as of 2009]
Truck traffic:10% of total traffic
Deck condition:Good [7 out of 9]
Superstructure condition:Fair [5 out of 9]
Substructure condition:Good [7 out of 9]
Structural appraisal:Somewhat better than minimum adequacy to tolerate being left in place as is [5]
Deck geometry appraisal:Basically intolerable requiring high priority of replacement [2]
Underclearances appraisal:Basically intolerable requiring high priority of corrrective action [3]
Roadway alignment appraisal:Equal to present desirable criteria [8]
Scour condition:Bridge not over waterway. [N]
Sufficiency rating:51.0

Previous Inspections

DateConditionDeckSuperstructureSubstructureADTSuff. Rating
March 2018FairGoodFairGood22975051.0
April 2016GoodVery GoodGoodGood22975062.0
April 2014GoodGoodVery GoodGood22975062.0
April 2012FairSatisfactoryVery GoodGood15400062.0
June 2010PoorPoorVery GoodGood15400059.0
April 2008PoorPoorVery GoodGood15400059.0
April 2006PoorPoorVery GoodGood15400059.0
March 2004FairSatisfactoryVery GoodGood15400062.0
November 2002FairSatisfactoryVery GoodGood15205079.0
May 2000FairSatisfactoryVery GoodGood15205079.0
April 1998FairSatisfactoryVery GoodGood15205079.0
April 1996GoodGoodGoodGood15400079.6
August 1994GoodGoodGoodGood15400079.6
August 1992GoodGoodGoodGood13660081.0

Element Data

Source: National Bridge Elements dataset, 2019 edition. This feature is experimental.
Prestressed Concrete Closed Web/Box Girderlinear ft.65501500
Reinforced Concrete Closed Web/Box Girderlinear ft.65501500
Prestressed Concrete Top Flangesq. ft.361361000
Reinforced Concrete Top Flangesq. ft.1,1091,109000
Reinforced Concrete Columneach88000
Reinforced Concrete Abutmentlinear ft.9793040
Reinforced Concrete Pier Caplinear ft.3232000
Pourable Jointlinear ft.179179000
Fixed Bearingeach1616000
Steel Protective Coatingsq. ft.88000
Bridge Rail
Reinforced Concrete Bridge Raillinear ft.167167000