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HWY BLUE HILL AV over RR MBTA

Map

Coordinates:
+42.27278, -71.09389
42°16'22" N, 71°05'38" W

Facts

Source: National Bridge Inventory. Information not verified; use at your own risk.
Name:HWY BLUE HILL AV over RR MBTA
Structure number:B161653H3DOT634
Old structure number:3H3900896165101 (from 1992 edition)
Location:1.2 KM N JCTSR28&SR138
Purpose:Carries highway and pedestrian walkway over railroad
Route classification:Other Principal Arterial (Urban) [14]
Length of largest span:79.4 ft. [24.2 m]
Total length:144.0 ft. [43.9 m]
Roadway width between curbs:84.0 ft. [25.6 m]
Deck width edge-to-edge:120.1 ft. [36.6 m]
Vertical clearance below bridge:18.0 ft. [5.5 m]
Skew angle:49°
Owner:State Highway Agency [01]
Year built:1902
Year reconstructed:1973
Historic significance:Bridge is not eligible for the National Register of Historic Places [5]
Design load:MS 18 / HS 20 [5]
Number of main spans:2
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 2016

Good/Fair/Poor Condition:Poor
Status:Open, no restriction [A]
Average daily traffic:22,300 [as of 2016]
Truck traffic:4% of total traffic
Deck condition:Fair [5 out of 9]
Superstructure condition:Satisfactory [6 out of 9]
Substructure condition:Poor [4 out of 9]
Structural appraisal:Meets minimum tolerable limits to be left in place as is [4]
Deck geometry appraisal:Superior to present desirable criteria [9]
Underclearances appraisal:Basically intolerable requiring high priority of replacement [2]
Roadway alignment appraisal:Better than present minimum criteria [7]
Scour condition:Bridge not over waterway. [N]
Operating rating:35.6 tons [32.4 metric tons]
Inventory rating:34.7 tons [31.5 metric tons]
Sufficiency rating:59.0
Recommended work:Replacement of bridge or other structure because of substandard load carrying capacity or substantial bridge roadway geometry. [31]
Estimated cost of work:$14,920,000

Previous Inspections

DateSuff. RatingConditionDeckSuperstructureSubstructureSD/FOADT
February 201659.0PoorFairSatisfactoryPoorSD22300
February 201455.4PoorFairSatisfactoryPoorSD43800
February 201273.2FairFairSatisfactoryFairFO43800
February 201073.5FairFairSatisfactoryFairFO42000
January 200069.2FairFairSatisfactoryFairFO38800
January 199872.8FairFairSatisfactoryFairFO34000
January 199682.4FairSatisfactorySatisfactorySatisfactoryFO9100

Element Data

Source: National Bridge Elements dataset, 2016 edition. This feature is experimental.
ElementUnitsQuantity1. Good2. Fair3. Poor4. Serious
Superstructure
Steel Girder/Beamlinear ft.315003150
Steel Protective Coatingsq. ft.999999000
Deck
Reinforced Concrete Decksq. ft.17,29514,9792,31600
Wearing Surfacessq. ft.12,09610,0402,05600
Substructure
Reinforced Concrete Columneach1010000
Masonry Abutmentlinear ft.50440475250
Joints
Pourable Jointlinear ft.399000399
Bearings
Movable Bearingeach3203200
Steel Protective Coatingsq. ft.999999000
Fixed Bearingeach3203200
Steel Protective Coatingsq. ft.999999000
Bridge Rail
Steel or Aluminum Bridge Raillinear ft.336033600
Steel Protective Coatingsq. ft.999999000