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I 495 NB over HWY COMMONWEALTH DR

Map

Coordinates:
+42.71383, -71.13706
42°42'50" N, 71°08'13" W

Facts

Source: National Bridge Inventory. Information not verified; use at your own risk.
Name:I 495 NB over HWY COMMONWEALTH DR
Structure number:L040402X9DOTNBI
Location:.4 MI N MERRIMAC RIVER
Purpose:Carries highway over highway
Route classification:Principal Arterial - Interstate (Urban) [11]
Length of largest span:46.9 ft. [14.3 m]
Total length:103.0 ft. [31.4 m]
Roadway width between curbs:60.0 ft. [18.3 m]
Deck width edge-to-edge:65.9 ft. [20.1 m]
Vertical clearance below bridge:16.4 ft. [5.0 m]
Skew angle:13°
Owner:State Highway Agency [01]
Year built:1962
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: February 2017

Good/Fair/Poor Condition:Fair
Status:Open, no restriction [A]
Average daily traffic:84,000 [as of 2017]
Truck traffic:10% of total traffic
Deck condition:Satisfactory [6 out of 9]
Superstructure condition:Good [7 out of 9]
Substructure condition:Good [7 out of 9]
Structural appraisal:Better than present minimum criteria [7]
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:84.6
Recommended work:Bridge rehabilitation because of general structure deterioration or inadequate strength. [35]
Estimated cost of work:$3,455,000

Previous Inspections

DateConditionDeckSuperstructureSubstructureADTSuff. Rating
February 2017FairSatisfactoryGoodGood8400084.6
February 2015FairSatisfactoryGoodGood8400084.6
February 2013FairSatisfactoryGoodGood8400084.6
February 2011FairFairGoodGood8400084.6
February 2009FairSatisfactoryGoodGood8300085.8

Element Data

Source: National Bridge Elements dataset, 2019 edition. This feature is experimental.
ElementUnitsQuantity1-Good2-Fair3-Poor4-Serious
Superstructure
Steel Girder/Beamlinear ft.1,1301,130000
Steel Protective Coatingsq. ft.9,8999,899000
Deck
Reinforced Concrete Decksq. ft.6,5006,4730189
Wearing Surfacessq. ft.6,2505,69955100
Concrete Protective Coatingsq. ft.6,2506,250000
Substructure
Reinforced Concrete Columneach1010000
Reinforced Concrete Abutmentlinear ft.235227080
Reinforced Concrete Pier Caplinear ft.1301200100
Joints
Pourable Jointlinear ft.107107000
Bearings
Elastomeric Bearingeach5454000
Bridge Rail
Reinforced Concrete Bridge Raillinear ft.2501747600