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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
Source: National Bridge Inventory
Information not verified. Use at your own risk.

Facts 

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 

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]
Evaluation:Structurally deficient [1]
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. ratingEvaluationDeckSuper.Sub.ADT
February 201659.0Structurally deficientFairSatisfactoryPoor22300
February 201455.4Structurally deficientFairSatisfactoryPoor43800
February 201273.2Functionally obsoleteFairSatisfactoryFair43800
February 201073.5Functionally obsoleteFairSatisfactoryFair42000
January 200069.2Functionally obsoleteFairSatisfactoryFair38800
January 199872.8Functionally obsoleteFairSatisfactoryFair34000
January 199682.4Functionally obsoleteSatisfactorySatisfactorySatisfactory9100