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I 495 over COMB MERRIMAC ST & MBTA

Map

Coordinates:
+42.70365, -71.13989
42°42'13" N, 71°08'24" W

Facts

Source: National Bridge Inventory. Information not verified; use at your own risk.
Name:I 495 over COMB MERRIMAC ST & MBTA
Structure number:L040372XBDOTNBI
Location:.32 KM S MERRIMAC RIVER
Purpose:Carries highway over highway and railroad
Route classification:Principal Arterial - Interstate (Urban) [11]
Length of largest span:102.7 ft. [31.3 m]
Total length:391.1 ft. [119.2 m]
Roadway width between curbs:88.6 ft. [27.0 m]
Deck width edge-to-edge:95.1 ft. [29.0 m]
Vertical clearance below bridge:23.0 ft. [7.0 m]
Skew angle:28°
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 / HS 20 [5]
Number of main spans:6
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 2017

Good/Fair/Poor Condition:Fair
Status:Open, no restriction [A]
Average daily traffic:88,300 [as of 2017]
Truck traffic:12% of total traffic
Deck condition:Satisfactory [6 out of 9]
Superstructure condition:Fair [5 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:Somewhat better than minimum adequacy to tolerate being left in place as is [5]
Underclearances appraisal:Basically intolerable requiring high priority of corrrective action [3]
Roadway alignment appraisal:Equal to present desirable criteria [8]
Scour condition:Bridge not over waterway. [N]
Sufficiency rating:69.0
Recommended work:Bridge rehabilitation because of general structure deterioration or inadequate strength. [35]
Estimated cost of work:$18,026,000

Previous Inspections

DateConditionDeckSuperstructureSubstructureADTSuff. Rating
December 2017FairSatisfactoryFairFair8830069.0
December 2015FairSatisfactoryFairFair9480069.0
December 2013FairVery GoodFairSatisfactory9480069.0
December 2011FairVery GoodFairSatisfactory9480062.3
December 2009FairVery GoodFairSatisfactory8000062.3

Element Data

Source: National Bridge Elements dataset, 2019 edition. This feature is experimental.
ElementUnitsQuantity1-Good2-Fair3-Poor4-Serious
Superstructure
Steel Girder/Beamlinear ft.5,3895,385004
Steel Protective Coatingsq. ft.95,59295,592000
Deck
Reinforced Concrete Decksq. ft.43,80141,2992,50200
Wearing Surfacessq. ft.36,82036,820000
Substructure
Reinforced Concrete Columneach3029100
Reinforced Concrete Abutmentlinear ft.225110100150
Reinforced Concrete Pier Caplinear ft.5431631552250
Joints
Pourable Jointlinear ft.5345142000
Bearings
Elastomeric Bearingeach168016800
Bridge Rail
Reinforced Concrete Bridge Raillinear ft.1,38190048100