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I 495 NB over HWY RAMPS A & B

Map

Coordinates:
+42.71158, -71.13724
42°42'42" N, 71°08'14" W

Facts

Source: National Bridge Inventory. Information not verified; use at your own risk.
Name:I 495 NB over HWY RAMPS A & B
Structure number:L040392X7DOTNBI
Location:.3 MI N MERRIMAC RIVER
Purpose:Carries highway over highway
Route classification:Principal Arterial - Interstate (Urban) [11]
Length of largest span:85.0 ft. [25.9 m]
Total length:149.0 ft. [45.4 m]
Roadway width between curbs:49.9 ft. [15.2 m]
Deck width edge-to-edge:70.5 ft. [21.5 m]
Vertical clearance below bridge:13.1 ft. [4.0 m]
Skew angle:
Owner:State Highway Agency [01]
Year built:1962
Year reconstructed:2002
Historic significance:Bridge is possibly eligible for the National Register of Historic Places [3]
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: December 2018

Good/Fair/Poor Condition:Fair
Status:Open, no restriction [A]
Average daily traffic:42,500 [as of 2016]
Truck traffic:13% of total traffic
Deck condition:Satisfactory [6 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:Meets minimum tolerable limits to be left in place as is [4]
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:89.8
Recommended work:Widening of existing bridge or other major structure without deck rehabilitation or replacement [33]
Estimated cost of work:$1,787,000

Previous Inspections

DateConditionDeckSuperstructureSubstructureADTSuff. Rating
December 2018FairSatisfactorySatisfactoryGood4250089.8
December 2016FairSatisfactoryGoodGood4250089.8
December 2014FairSatisfactoryGoodGood9480084.7
December 2012FairSatisfactoryVery GoodGood9480084.7
December 2010FairSatisfactoryVery GoodGood8020086.1
December 2008FairSatisfactoryVery GoodGood8020086.1

Element Data

Source: National Bridge Elements dataset, 2019 edition. This feature is experimental.
ElementUnitsQuantity1-Good2-Fair3-Poor4-Serious
Superstructure
Steel Girder/Beamlinear ft.1,4501,445500
Steel Protective Coatingsq. ft.11,48411,4660180
Deck
Reinforced Concrete Decksq. ft.10,1709,660495150
Wearing Surfacessq. ft.7,4587,458000
Substructure
Reinforced Concrete Columneach1010000
Reinforced Concrete Abutmentlinear ft.160160000
Reinforced Concrete Pier Caplinear ft.150148020
Joints
Pourable Jointlinear ft.101101000
Bearings
Elastomeric Bearingeach6060000
Bridge Rail
Reinforced Concrete Bridge Raillinear ft.596059600