I 93 NB B16-NB4 over I 93 SB&CMBRG&MBTA/BMRR


+42.38321, -71.07649
42°22'60" N, 71°04'35" W


Source: National Bridge Inventory. Information not verified; use at your own risk.
Name:I 93 NB B16-NB4 over I 93 SB&CMBRG&MBTA/BMRR
Structure number:B162813E3DOTNBI
Location:1.1 MI N OF JCT I93&US1
Purpose:Carries highway over highway and railroad
Route classification:Principal Arterial - Interstate (Urban) [11]
Length of largest span:212.0 ft. [64.6 m]
Total length:1233.0 ft. [375.8 m]
Roadway width between curbs:64.3 ft. [19.6 m]
Deck width edge-to-edge:71.2 ft. [21.7 m]
Vertical clearance above deck:15.4 ft. [4.7 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:10
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: April 2017

Good/Fair/Poor Condition:Fair
Status:Open, no restriction [A]
Average daily traffic:85,450 [as of 2015]
Truck traffic:8% of total traffic
Deck condition:Satisfactory [6 out of 9]
Superstructure condition:Fair [5 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:Better than present minimum criteria [7]
Scour condition:Bridge not over waterway. [N]
Sufficiency rating:68.7
Recommended work:Bridge rehabilitation because of general structure deterioration or inadequate strength. [35]
Estimated cost of work:$42,262,000

Previous Inspections

DateConditionDeckSuperstructureSubstructureADTSuff. Rating
April 2017FairSatisfactoryFairFair8545068.7
April 2015FairSatisfactoryFairFair4794074.3
April 2013FairSatisfactoryFairSatisfactory4794074.3
March 2011FairSatisfactoryFairSatisfactory8420070.0
April 2008FairSatisfactoryFairSatisfactory8420070.0

Element Data

Source: National Bridge Elements dataset, 2019 edition. This feature is experimental.
Steel Girder/Beamlinear ft.11,23311,11201210
Steel Protective Coatingsq. ft.168,868143,51019,0833,1383,137
Reinforced Concrete Decksq. ft.93,70893,6970110
Wearing Surfacessq. ft.85,07781,3843,680130
Steel Columneach24110130
Steel Protective Coatingsq. ft.11,6694,3403,6571,8441,828
Reinforced Concrete Columneach116500
Steel Pier Caplinear ft.8983014601370
Steel Protective Coatingsq. ft.17,9976,4225,7872,8942,894
Reinforced Concrete Pier Caplinear ft.2101842600
Compression Jointlinear ft.1420607012
Open Jointlinear ft.143137600
Other Jointlinear ft.20514350012
Movable Bearingeach1600160
Steel Protective Coatingsq. ft.4800048
Fixed Bearingeach2401680
Steel Protective Coatingsq. ft.80064016
Bridge Rail
Steel or Aluminum Bridge Raillinear ft.2,4662,459070
Reinforced Concrete Bridge Raillinear ft.2,4662,3670990