SR 509 over N-N RAMP


+47.52497, -122.33361
47°31'30" N, 122°20'01" W
Source: National Bridge Inventory
Information not verified. Use at your own risk.


Name:SR 509 over N-N RAMP
Structure number:0008276F0000000
Location:4.0 N JCT SR 518
Purpose:Carries highway over highway
Route classification:Principal Arterial - Other Freeways or Expressways (Urban) [12]
Length of largest span:149.9 ft. [45.7 m]
Total length:462.9 ft. [141.1 m]
Roadway width between curbs:24.0 ft. [7.3 m]
Deck width edge-to-edge:26.9 ft. [8.2 m]
Vertical clearance below bridge:18.4 ft. [5.6 m]
Owner:State Highway Agency [01]
Year built:1968
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:4
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: August 2015 

Status:Open, no restriction [A]
Average daily traffic:10,086 [as of 2012]
Truck traffic:5% of total traffic
Deck condition:Good [7 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:Better than present minimum criteria [7]
Underclearances appraisal:Equal to present minimum criteria [6]
Roadway alignment appraisal:Equal to present desirable criteria [8]
Scour condition:Bridge not over waterway. [N]
Operating rating:98.0 tons [89.1 metric tons]
Inventory rating:61.4 tons [55.8 metric tons]
Sufficiency rating:98.6

Previous Inspections 

DateSuff. ratingEvaluationDeckSuper.Sub.ADT
August 201598.6Not deficientGoodSatisfactoryGood10086
August 201394.7Functionally obsoleteGoodSatisfactoryGood8599
August 201194.7Functionally obsoleteSatisfactorySatisfactoryGood8599
August 200998.8Not deficientSatisfactorySatisfactoryGood8371
July 200799.1Not deficientSatisfactorySatisfactoryGood6709
September 200598.1Not deficientSatisfactorySatisfactoryGood6709
December 200398.1Not deficientSatisfactorySatisfactoryGood6709
November 200199.1Not deficientSatisfactorySatisfactoryGood6709
20000.0Not applicable---48000
June 199999.1Not deficientSatisfactorySatisfactoryGood6709
July 199795.0Functionally obsoleteSatisfactorySatisfactoryGood6709
December 199594.9Functionally obsoleteSatisfactorySatisfactoryGood6709
June 199394.0Not deficientSatisfactorySatisfactoryGood6000