I 93 NB over I 93 SB BT 57 - 61


+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 NB over I 93 SB BT 57 - 61
Structure number:B162813BPDOTNBI
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:333.0 ft. [101.5 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:20.3 ft. [6.2 m]
Vertical clearance below bridge:13.1 ft. [4.0 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 / HS 20 [5]
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: April 2018

Good/Fair/Poor Condition:Fair
Status:Open, no restriction [A]
Average daily traffic:67,375 [as of 2017]
Truck traffic:8% of total traffic
Deck condition:Satisfactory [6 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:Superior to present desirable criteria [9]
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:87.4
Recommended work:Other structural work, including hydraulic replacements. [38]
Estimated cost of work:$2,168,000

Previous Inspections

DateConditionDeckSuperstructureSubstructureADTSuff. Rating
April 2018FairSatisfactorySatisfactorySatisfactory6737587.4
April 2016FairSatisfactorySatisfactorySatisfactory5890088.2
April 2014FairSatisfactorySatisfactoryFair7420074.6
April 2012FairSatisfactorySatisfactorySatisfactory7420082.3
April 2010FairSatisfactorySatisfactorySatisfactory7420082.3
April 2008FairSatisfactorySatisfactorySatisfactory7420082.3

Element Data

Source: National Bridge Elements dataset, 2019 edition. This feature is experimental.
Steel Girder/Beamlinear ft.1,7821,439163270
Steel Protective Coatingsq. ft.32,07616,03810,6925,3460
Steel Stringerlinear ft.2,5851,93706480
Steel Protective Coatingsq. ft.15,510011,6323,8780
Reinforced Concrete Decksq. ft.30,88530,881040
Wearing Surfacessq. ft.30,38720,50009,8870
Steel Floor Beamlinear ft.52201743480
Steel Protective Coatingsq. ft.8,352008,3520
Steel Columneach1313000
Steel Protective Coatingsq. ft.7,2807,280000
Steel Pier Caplinear ft.2560230260
Steel Protective Coatingsq. ft.4,096004,0960
Strip Seal Jointlinear ft.99015840
Bridge Rail
Steel or Aluminum Bridge Raillinear ft.660652800
Reinforced Concrete Bridge Raillinear ft.9409122800