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


+42.38278, -71.07667
42°22'58" N, 71°04'36" 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:15.7 ft. [4.8 m]
Vertical clearance below bridge:16.4 ft. [5.0 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 2015

Good/Fair/Poor Condition:Fair
Status:Open, no restriction [A]
Average daily traffic:47,940 [as of 2012]
Truck traffic:9% 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:Somewhat better than minimum adequacy to tolerate being left in place as is [5]
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]
Operating rating:60.2 tons [54.7 metric tons]
Inventory rating:36.1 tons [32.8 metric tons]
Sufficiency rating:74.3
Recommended work:Bridge rehabilitation because of general structure deterioration or inadequate strength. [35]
Estimated cost of work:$45,934,000

Previous Inspections

DateSuff. RatingConditionDeckSuperstructureSubstructureSD/FOADT
April 201574.3FairSatisfactoryFairFairFO47940
April 201374.3FairSatisfactoryFairSatisfactoryFO47940
March 201170.0FairSatisfactoryFairSatisfactoryFO84200
April 200870.0FairSatisfactoryFairSatisfactoryFO84200

Element Data

Source: National Bridge Elements dataset, 2016 edition. This feature is experimental.
ElementUnitsQuantity1. Good2. Fair3. Poor4. Serious
Steel Girder/Beamlinear ft.11,2048,7071,7457520
Steel Protective Coatingsq. ft.1,9981,998000
Reinforced Concrete Decksq. ft.87,78082,5135,26700
Wearing Surfacessq. ft.87,78083,3914,38900
Steel Columneach2461800
Steel Protective Coatingsq. ft.1,9981,998000
Reinforced Concrete Columneach1101010
Steel Pier Caplinear ft.8871783253840
Steel Protective Coatingsq. ft.1,9981,998000
Reinforced Concrete Pier Caplinear ft.210210000
Compression Jointlinear ft.141070071
Open Jointlinear ft.144144000
Other Jointlinear ft.220000220
Movable Bearingeach1601600
Steel Protective Coatingsq. ft.999999000
Fixed Bearingeach2420400
Steel Protective Coatingsq. ft.1,9981,998000
Bridge Rail
Other Material Bridge Raillinear ft.2,46702,0970370