I 93 NB B5-B10 over COMB MBTA & I 93 SB


+42.38125, -71.07666
42°22'53" N, 71°04'36" W


Source: National Bridge Inventory. Information not verified; use at your own risk.
Name:I 93 NB B5-B10 over COMB MBTA & I 93 SB
Structure number:B162813DYDOTNBI
Location:.8 MI N OF RAMP I93&US1
Purpose:Carries highway over highway and railroad
Route classification:Principal Arterial - Interstate (Urban) [11]
Length of largest span:139.1 ft. [42.4 m]
Total length:549.9 ft. [167.6 m]
Roadway width between curbs:57.1 ft. [17.4 m]
Deck width edge-to-edge:62.0 ft. [18.9 m]
Vertical clearance below bridge:13.1 ft. [4.0 m]
Skew angle:99°
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 / HS 20 [5]
Number of main spans:5
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: April 2017

Good/Fair/Poor Condition:Fair
Status:Open, no restriction [A]
Average daily traffic:47,940 [as of 2015]
Truck traffic:9% 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:Better than present minimum criteria [7]
Underclearances appraisal:Basically intolerable requiring high priority of corrrective action [3]
Roadway alignment appraisal:Better than present minimum criteria [7]
Scour condition:Bridge not over waterway. [N]
Sufficiency rating:74.2
Recommended work:Bridge rehabilitation because of general structure deterioration or inadequate strength. [35]
Estimated cost of work:$16,447,000

Previous Inspections

DateConditionDeckSuperstructureSubstructureADTSuff. Rating
April 2017FairSatisfactorySatisfactoryFair4794074.2
April 2015FairSatisfactorySatisfactoryFair4794074.2
April 2013FairSatisfactorySatisfactoryFair4794074.2
March 2011FairSatisfactoryFairFair5990072.8
April 2008FairSatisfactoryFairFair5990072.8

Element Data

Source: National Bridge Elements dataset, 2019 edition. This feature is experimental.
Steel Girder/Beamlinear ft.2,7462,63695150
Steel Protective Coatingsq. ft.50,80126,140024,383278
Steel Stringerlinear ft.1,5961,5019500
Steel Protective Coatingsq. ft.11,1729,8471,32500
Reinforced Concrete Decksq. ft.31,35031,3370130
Wearing Surfacessq. ft.27,50025,3632,13610
Steel Floor Beamlinear ft.301030100
Steel Protective Coatingsq. ft.4,0642,03202,0320
Steel Columneach1616000
Steel Protective Coatingsq. ft.5,0585,058000
Steel Pier Caplinear ft.522005220
Steel Protective Coatingsq. ft.10,2318,07008101,351
Open Jointlinear ft.155155000
Bridge Rail
Steel or Aluminum Bridge Raillinear ft.1,1001,083098
Reinforced Concrete Bridge Raillinear ft.1,1001,0570430