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I 495 over CHRISTINA RIVER, N/S RR

Map

Coordinates:
+39.72372, -75.53556
39°43'25" N, 75°32'08" W

Facts

Source: National Bridge Inventory. Information not verified; use at your own risk.
Name:I 495 over CHRISTINA RIVER, N/S RR
Structure number:1813 060
Location:WILMINGTON
Purpose:Carries highway over highway, waterway, and railroad
Route classification:Principal Arterial - Interstate (Urban) [11]
Length of largest span:325.1 ft. [99.1 m]
Total length:4804.4 ft. [1464.3 m]
Roadway width between curbs:93.5 ft. [28.5 m]
Deck width edge-to-edge:97.1 ft. [29.6 m]
Vertical clearance above deck:19.7 ft. [6.0 m]
Vertical clearance below bridge:68.9 ft. [21.0 m]
Owner:State Highway Agency [01]
Year built:1974
Year reconstructed:2006
Historic significance:Bridge is not eligible for the National Register of Historic Places [5]
Design load:MS 18+Mod / HS 20+Mod [6]
Number of main spans:3
Main spans material:Steel continuous [4]
Main spans design:Girder and floorbeam system [03]
Deck type:Concrete Cast-in-Place [1]
Wearing surface:Monolithic Concrete (concurrently placed with structural deck) [1]

Latest Available Inspection: June 2018

Good/Fair/Poor Condition:Fair
Status:Open, no restriction [A]
Average daily traffic:103,730 [as of 2017]
Truck traffic:15% of total traffic
Deck condition:Satisfactory [6 out of 9]
Superstructure condition:Satisfactory [6 out of 9]
Substructure condition:Fair [5 out of 9]
Structural appraisal:Somewhat better than minimum adequacy to tolerate being left in place as is [5]
Deck geometry appraisal:Better than present minimum criteria [7]
Underclearances appraisal:Meets minimum tolerable limits to be left in place as is [4]
Water adequacy appraisal:Superior to present desirable criteria [9]
Roadway alignment appraisal:Equal to present desirable criteria [8]
Channel protection:Bank is beginning to slump. River control devices and embankment protection have widespread minor damage. There is minor stream bed movement evident. Debris is restricting the channel slightly. [6]
Pier/abutment protection:In place and functioning [2]
Scour condition:Bridge foundations determined to be stable for the assessed or calculated scour condition. [8]
Sufficiency rating:70.0
Recommended work:Bridge rehabilitation because of general structure deterioration or inadequate strength. [35]
Estimated cost of work:$4,200,000

Previous Inspections

DateConditionDeckSuperstructureSubstructureADTSuff. Rating
June 2018FairSatisfactorySatisfactoryFair10373070.0
June 2016FairSatisfactorySatisfactoryFair8808070.0
June 2014FairSatisfactoryGoodSatisfactory8286081.0
October 2012FairSatisfactoryGoodSatisfactory9037982.0
October 2010FairSatisfactoryGoodSatisfactory8498783.0
December 2008FairSatisfactoryGoodSatisfactory8498783.0
December 2006FairSatisfactoryGoodSatisfactory7929882.0
March 2002FairGoodGoodSatisfactory7439884.0
November 2000FairGoodGoodSatisfactory3719986.4
September 1998FairGoodGoodSatisfactory6987984.0
November 1996FairGoodGoodSatisfactory3651686.6
March 1994PoorSatisfactorySeriousSatisfactory4365940.0
March 1992FairFairGoodGood3856784.2

Element Data

Source: National Bridge Elements dataset, 2019 edition. This feature is experimental.
ElementUnitsQuantity1-Good2-Fair3-Poor4-Serious
Superstructure
Steel Girder/Beamlinear ft.46,68834,07612,2883240
Steel Protective Coatingsq. ft.897,1020885,08911,684329
Steel Stringerlinear ft.5,8004,3461,45400
Steel Protective Coatingsq. ft.42,326040,8721,4504
Deck
Reinforced Concrete Decksq. ft.423,774415,9664777,3310
Wearing Surfacessq. ft.423,774422,4231,0702810
Superstructure
Steel Floor Beamlinear ft.2,4901,86562320
Steel Protective Coatingsq. ft.31,290030,6676230
Substructure
Reinforced Concrete Columneach721917360
Reinforced Concrete Pier Walllinear ft.6455630
Reinforced Concrete Abutmentlinear ft.1941341590
Reinforced Concrete Pile Cap/Footinglinear ft.81051729210
Reinforced Concrete Pier Caplinear ft.3,2842,4262286300
Joints
Pourable Jointlinear ft.194194000
Compression Jointlinear ft.1,18310831,0900
Open Jointlinear ft.1820158240
Bearings
Elastomeric Bearingeach2402400
Steel Protective Coatingsq. ft.1441321200
Movable Bearingeach40871271660
Steel Protective Coatingsq. ft.2,448712,00528884
Fixed Bearingeach14836100120
Steel Protective Coatingsq. ft.888077610012
Pot Bearingeach1201200
Steel Protective Coatingsq. ft.72060120
Bridge Rail
Reinforced Concrete Bridge Raillinear ft.17,65914,5676812,4056