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

Good/Fair/Poor Condition:Fair
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. RatingConditionDeckSuperstructureSubstructureSD/FOADT
August 201598.6FairGoodSatisfactoryGood-10086
August 201394.7FairGoodSatisfactoryGoodFO8599
August 201194.7FairSatisfactorySatisfactoryGoodFO8599
August 200998.8FairSatisfactorySatisfactoryGood-8371
July 200799.1FairSatisfactorySatisfactoryGood-6709
September 200598.1FairSatisfactorySatisfactoryGood-6709
December 200398.1FairSatisfactorySatisfactoryGood-6709
November 200199.1FairSatisfactorySatisfactoryGood-6709
June 199999.1FairSatisfactorySatisfactoryGood-6709
July 199795.0FairSatisfactorySatisfactoryGoodFO6709
December 199594.9FairSatisfactorySatisfactoryGoodFO6709
June 199394.0FairSatisfactorySatisfactoryGood-6000

Element Data

Source: National Bridge Elements dataset, 2016 edition. This feature is experimental.
ElementUnitsQuantity1. Good2. Fair3. Poor4. Serious
Reinforced Concrete Closed Web/Box Girderlinear ft.4634480150
Reinforced Concrete Decksq. ft.11,11211,110200
Reinforced Concrete Columneach33000
Reinforced Concrete Abutmentlinear ft.5454000
Pourable Jointlinear ft.4800048
Assembly without Seal Jointlinear ft.4804800
Movable Bearingeach88000
Bridge Rail
Steel or Aluminum Bridge Raillinear ft.926926000
Reinforced Concrete Bridge Raillinear ft.9268960300