I 93 SB BT 57-61 over RR MBTA & BMRR


+42.37879, -71.07608
42°22'44" N, 71°04'34" W


Source: National Bridge Inventory. Information not verified; use at your own risk.
Name:I 93 SB BT 57-61 over RR MBTA & BMRR
Structure number:B162813BUDOTNBI
Location:.5 MI N OF JCT 193&US1
Purpose:Carries highway over railroad
Route classification:Principal Arterial - Interstate (Urban) [11]
Length of largest span:83.0 ft. [25.3 m]
Total length:335.0 ft. [102.1 m]
Roadway width between curbs:44.3 ft. [13.5 m]
Deck width edge-to-edge:89.6 ft. [27.3 m]
Vertical clearance above deck:16.4 ft. [5.0 m]
Vertical clearance below bridge:16.4 ft. [5.0 m]
Owner:State Highway Agency [01]
Year built:1970
Historic significance:Bridge is not eligible for the National Register of Historic Places [5]
Design load:MS 18+Mod / HS 20+Mod [6]
Number of main spans:4
Main spans material:Steel [3]
Main spans design:Girder and floorbeam system [03]
Deck type:Concrete Cast-in-Place [1]
Wearing surface:Bituminous [6]

Latest Available Inspection: November 2018

Good/Fair/Poor Condition:Fair
Status:Open, no restriction [A]
Average daily traffic:87,100 [as of 2016]
Truck traffic:6% of total traffic
Deck condition:Satisfactory [6 out of 9]
Superstructure condition:Satisfactory [6 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:Meets minimum tolerable limits to be left in place as is [4]
Underclearances appraisal:Basically intolerable requiring high priority of corrrective action [3]
Roadway alignment appraisal:Equal to present minimum criteria [6]
Scour condition:Bridge not over waterway. [N]
Sufficiency rating:53.0
Recommended work:Bridge rehabilitation because of general structure deterioration or inadequate strength. [35]
Estimated cost of work:$14,219,000

Previous Inspections

DateConditionDeckSuperstructureSubstructureADTSuff. Rating
November 2018FairSatisfactorySatisfactoryFair8710053.0
November 2016FairSatisfactorySatisfactoryFair6870055.7
November 2014FairSatisfactorySatisfactoryFair6870055.7
November 2012FairSatisfactorySatisfactoryFair6870055.7
March 2012FairSatisfactorySatisfactoryFair6870055.7
March 2010FairSatisfactorySatisfactoryFair6870055.7
February 2010FairSatisfactorySatisfactoryFair6870055.7

Element Data

Source: National Bridge Elements dataset, 2019 edition. This feature is experimental.
Steel Girder/Beamlinear ft.1,8231,7944250
Steel Protective Coatingsq. ft.23,82023,320420800
Steel Stringerlinear ft.2,5442,544000
Steel Protective Coatingsq. ft.17,37010,9706,40000
Reinforced Concrete Decksq. ft.34,72834,6390890
Wearing Surfacessq. ft.32,38331,1698903240
Steel Floor Beamlinear ft.525520500
Steel Protective Coatingsq. ft.10,10010,0604000
Steel Columneach1310120
Steel Protective Coatingsq. ft.7,0254,6251,6008000
Steel Pier Caplinear ft.618264314400
Steel Protective Coatingsq. ft.8,7505,9002,100650100
Assembly without Seal Jointlinear ft.20716631100
Bridge Rail
Steel or Aluminum Bridge Raillinear ft.529513790
Steel Protective Coatingsq. ft.1,1221,122000
Reinforced Concrete Bridge Raillinear ft.670525105400
Timber Bridge Raillinear ft.141014100