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I 495 SB RAMP L over COMB MERRIMAC ST & MBTA

Map

Coordinates:
+42.70337, -71.14047
42°42'12" N, 71°08'26" W

Facts

Source: National Bridge Inventory. Information not verified; use at your own risk.
Name:I 495 SB RAMP L over COMB MERRIMAC ST & MBTA
Structure number:L040442XCDOTNBI
Location:.16 KM W I495
Purpose:Carries highway over highway and railroad
Route classification:Minor Arterial (Urban) [16]
Length of largest span:80.1 ft. [24.4 m]
Total length:395.0 ft. [120.4 m]
Roadway width between curbs:27.9 ft. [8.5 m]
Deck width edge-to-edge:34.1 ft. [10.4 m]
Vertical clearance below bridge:23.0 ft. [7.0 m]
Skew angle:22°
Owner:State Highway Agency [01]
Year built:1963
Historic significance:Bridge is possibly eligible for the National Register of Historic Places [3]
Design load:M 18 / H 20 [4]
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:Poor
Status:Open, no restriction [A]
Average daily traffic:14,000 [as of 2017]
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 corrrective action [3]
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:43.2
Recommended work:Bridge rehabilitation because of general structure deterioration or inadequate strength. [35]
Estimated cost of work:$6,520,000

Previous Inspections

DateConditionDeckSuperstructureSubstructureADTSuff. Rating
December 2017PoorSatisfactoryPoorFair1400043.2
December 2015FairFairSatisfactoryFair1320059.8
December 2013FairFairSatisfactoryFair1320059.8
December 2011FairFairSatisfactoryFair1270060.0
December 2009FairSatisfactoryGoodSatisfactory1500072.1

Element Data

Source: National Bridge Elements dataset, 2019 edition. This feature is experimental.
ElementUnitsQuantity1-Good2-Fair3-Poor4-Serious
Superstructure
Steel Girder/Beamlinear ft.1,5636456182928
Steel Protective Coatingsq. ft.16,16406,5286,5283,108
Deck
Reinforced Concrete Decksq. ft.15,13010,0004,7463840
Wearing Surfacessq. ft.12,39912,399000
Substructure
Reinforced Concrete Columneach1501410
Reinforced Concrete Abutmentlinear ft.85040450
Reinforced Concrete Pier Caplinear ft.1804013640
Joints
Pourable Jointlinear ft.75403050
Other Jointlinear ft.183183000
Bearings
Movable Bearingeach3000291
Steel Protective Coatingsq. ft.660060250350
Fixed Bearingeach3000300
Steel Protective Coatingsq. ft.6600100260300
Bridge Rail
Steel or Aluminum Bridge Raillinear ft.3301506020100