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I 495 SB over HWY COMMONWEALTH DR

Map

Coordinates:
+42.71389, -71.13743
42°42'50" N, 71°08'15" W

Facts

Source: National Bridge Inventory. Information not verified; use at your own risk.
Name:I 495 SB over HWY COMMONWEALTH DR
Structure number:L040402XADOTNBI
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:49.9 ft. [15.2 m]
Deck width edge-to-edge:56.1 ft. [17.1 m]
Vertical clearance below bridge:13.1 ft. [4.0 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:Fair [5 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:79.1
Recommended work:Widening of existing bridge with deck rehabilitation or replacement. [34]
Estimated cost of work:$3,671,000

Previous Inspections

DateConditionDeckSuperstructureSubstructureADTSuff. Rating
February 2017FairFairGoodGood8400079.1
February 2015FairSatisfactoryGoodGood8400080.2
February 2013FairSatisfactoryGoodGood8400080.2
February 2011FairSatisfactoryGoodGood8400080.2
February 2009GoodGoodGoodGood8300080.3

Element Data

Source: National Bridge Elements dataset, 2019 edition. This feature is experimental.
ElementUnitsQuantity1-Good2-Fair3-Poor4-Serious
Superstructure
Steel Girder/Beamlinear ft.1,0001,000000
Steel Protective Coatingsq. ft.8,7608,760000
Deck
Reinforced Concrete Decksq. ft.6,2756,129013214
Wearing Surfacessq. ft.6,2506,250000
Concrete Protective Coatingsq. ft.6,2506,250000
Substructure
Reinforced Concrete Columneach88000
Reinforced Concrete Abutmentlinear ft.2311735323
Reinforced Concrete Pier Caplinear ft.110110000
Joints
Pourable Jointlinear ft.10397060
Bearings
Elastomeric Bearingeach4848000
Bridge Rail
Reinforced Concrete Bridge Raillinear ft.250250000