I 93 NB over I 93 SB BT 46 - 57


+42.37778, -71.07556
42°22'40" N, 71°04'32" W


Source: National Bridge Inventory. Information not verified; use at your own risk.
Name:I 93 NB over I 93 SB BT 46 - 57
Structure number:B162813BMDOTNBI
Location:.5 MI N OF JCT I93&US1
Purpose:Carries highway over highway
Route classification:Principal Arterial - Interstate (Urban) [11]
Length of largest span:82.0 ft. [25.0 m]
Total length:898.0 ft. [273.7 m]
Roadway width between curbs:62.0 ft. [18.9 m]
Deck width edge-to-edge:68.9 ft. [21.0 m]
Vertical clearance above deck:15.7 ft. [4.8 m]
Vertical clearance below bridge:14.8 ft. [4.5 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 / HS 20 [5]
Number of main spans:11
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 2016

Good/Fair/Poor Condition:Fair
Status:Open, no restriction [A]
Average daily traffic:58,900 [as of 2016]
Truck traffic:8% of total traffic
Deck condition:Fair [5 out of 9]
Superstructure condition:Satisfactory [6 out of 9]
Substructure condition:Satisfactory [6 out of 9]
Structural appraisal:Equal to present minimum criteria [6]
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]
Operating rating:60.6 tons [55.1 metric tons]
Inventory rating:36.3 tons [33.0 metric tons]
Sufficiency rating:76.0
Recommended work:Bridge deck rehabilitation with only incidental widening. [36]
Estimated cost of work:$14,828,000

Previous Inspections

DateSuff. RatingConditionDeckSuperstructureSubstructureSD/FOADT
April 201676.0FairFairSatisfactorySatisfactoryFO58900
April 201476.0FairFairSatisfactorySatisfactoryFO74200
April 201277.0FairSatisfactorySatisfactorySatisfactoryFO74200
April 201077.0FairSatisfactorySatisfactorySatisfactoryFO96400
March 200877.0FairSatisfactorySatisfactorySatisfactoryFO96400

Element Data

Source: National Bridge Elements dataset, 2016 edition. This feature is experimental.
ElementUnitsQuantity1. Good2. Fair3. Poor4. Serious
Steel Girder/Beamlinear ft.1,7941,50229200
Steel Protective Coatingsq. ft.1,9981,998000
Steel Stringerlinear ft.74,78373,2321,55100
Steel Protective Coatingsq. ft.1,9981,998000
Reinforced Concrete Decksq. ft.65,25361,9903,26300
Wearing Surfacessq. ft.65,25161,9883,26300
Steel Floor Beamlinear ft.1,6141611,372810
Steel Protective Coatingsq. ft.999999000
Steel Columneach6006000
Steel Protective Coatingsq. ft.1,9981,998000
Steel Pier Caplinear ft.1,133393679610
Steel Protective Coatingsq. ft.2,9972,997000
Compression Jointlinear ft.6969000
Open Jointlinear ft.2071971000
Bridge Rail
Steel or Aluminum Bridge Raillinear ft.1,7951,7050090
Reinforced Concrete Bridge Raillinear ft.1,7951,7752000