I 495 NB over ST110


+42.84665, -70.91894
42°50'48" N, 70°55'08" W


Source: National Bridge Inventory. Information not verified; use at your own risk.
Name:I 495 NB over ST110
Structure number:A070252WGDOTNBI
Location:AT EXIT 55
Purpose:Carries highway over highway
Route classification:Principal Arterial - Interstate (Urban) [11]
Length of largest span:95.1 ft. [29.0 m]
Total length:200.1 ft. [61.0 m]
Roadway width between curbs:38.1 ft. [11.6 m]
Deck width edge-to-edge:44.3 ft. [13.5 m]
Vertical clearance below bridge:13.1 ft. [4.0 m]
Skew angle:50°
Owner:State Highway Agency [01]
Year built:1964
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 [3]
Main spans design:Stringer/Multi-beam or girder [02]
Deck type:Concrete Cast-in-Place [1]
Wearing surface:Bituminous [6]

Latest Available Inspection: June 2018

Good/Fair/Poor Condition:Poor
Status:Open, would be posted or closed except for temporary shoring [D]
Average daily traffic:28,012 [as of 2016]
Truck traffic:12% of total traffic
Deck condition:Satisfactory [6 out of 9]
Superstructure condition:Poor [4 out of 9]
Substructure condition:Fair [5 out of 9]
Structural appraisal:Meets minimum tolerable limits to be left in place as is [4]
Deck geometry appraisal:Basically intolerable requiring high priority of replacement [2]
Underclearances appraisal:Meets minimum tolerable limits to be left in place as is [4]
Roadway alignment appraisal:Equal to present desirable criteria [8]
Scour condition:Bridge not over waterway. [N]
Sufficiency rating:44.0
Recommended work:Bridge rehabilitation because of general structure deterioration or inadequate strength. [35]
Estimated cost of work:$4,234,000

Previous Inspections

DateConditionDeckSuperstructureSubstructureADTSuff. Rating
June 2018PoorSatisfactoryPoorFair2801244.0
June 2016PoorSatisfactoryPoorSatisfactory2801244.0
June 2014FairSatisfactorySatisfactorySatisfactory5510070.1
June 2012FairSatisfactorySatisfactorySatisfactory5510070.1
June 2010FairFairSatisfactorySatisfactory5510069.0
June 2008FairSatisfactorySatisfactorySatisfactory5510070.1

Element Data

Source: National Bridge Elements dataset, 2019 edition. This feature is experimental.
Steel Girder/Beamlinear ft.1,1821,11056115
Steel Protective Coatingsq. ft.12,0407,224004,816
Reinforced Concrete Decksq. ft.8,3003,2864,966480
Wearing Surfacessq. ft.7,6297,629000
Reinforced Concrete Columneach80170
Reinforced Concrete Abutmentlinear ft.1390104350
Reinforced Concrete Pier Caplinear ft.1377047200
Pourable Jointlinear ft.2362111690
Movable Bearingeach1800171
Fixed Bearingeach1800180
Bridge Rail
Steel or Aluminum Bridge Raillinear ft.4023860160
Reinforced Concrete Bridge Raillinear ft.402401100