SR 509 over N-N RAMP


+47.52475, -122.33411
47°31'29" N, 122°20'03" 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:16.4 ft. [5.0 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 2017

Good/Fair/Poor Condition:Fair
Status:Open, no restriction [A]
Average daily traffic:11,422 [as of 2016]
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]
Sufficiency rating:98.4
Recommended work:Bridge rehabilitation because of general structure deterioration or inadequate strength. [35]
Estimated cost of work:$4,815,000

Previous Inspections

DateConditionDeckSuperstructureSubstructureADTSuff. Rating
August 2017FairGoodSatisfactoryGood1142298.4
August 2015FairGoodSatisfactoryGood1008698.6
August 2013FairGoodSatisfactoryGood859994.7
August 2011FairSatisfactorySatisfactoryGood859994.7
August 2009FairSatisfactorySatisfactoryGood837198.8
July 2007FairSatisfactorySatisfactoryGood670999.1
September 2005FairSatisfactorySatisfactoryGood670998.1
December 2003FairSatisfactorySatisfactoryGood670998.1
November 2001FairSatisfactorySatisfactoryGood670999.1
June 1999FairSatisfactorySatisfactoryGood670999.1
July 1997FairSatisfactorySatisfactoryGood670995.0
December 1995FairSatisfactorySatisfactoryGood670994.9
June 1993FairSatisfactorySatisfactoryGood600094.0

Element Data

Source: National Bridge Elements dataset, 2019 edition. This feature is experimental.
Reinforced Concrete Closed Web/Box Girderlinear ft.4634430200
Reinforced Concrete Decksq. ft.11,11211,111100
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