I 93 NB BT 38-46 over I 93 SB BT 38-46


+42.37536, -71.07302
42°22'31" N, 71°04'23" W


Source: National Bridge Inventory. Information not verified; use at your own risk.
Name:I 93 NB BT 38-46 over I 93 SB BT 38-46
Structure number:B162813DWDOTNBI
Location:.7 MI N OF JCT US1&I93
Purpose:Carries highway over highway
Route classification:Principal Arterial - Interstate (Urban) [11]
Length of largest span:82.0 ft. [25.0 m]
Total length:651.9 ft. [198.7 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:15.4 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:8
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: March 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: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:70.6
Recommended work:Bridge rehabilitation because of general structure deterioration or inadequate strength. [35]
Estimated cost of work:$22,436,000

Previous Inspections

DateConditionDeckSuperstructureSubstructureADTSuff. Rating
March 2016FairFairFairFair5890070.6
March 2014FairSatisfactoryFairFair7420069.9
March 2012FairSatisfactoryFairFair7420069.9
March 2010FairSatisfactorySatisfactoryFair7420070.0
March 2008FairSatisfactorySatisfactoryFair7420070.0

Element Data

Source: National Bridge Elements dataset, 2018 edition. This feature is experimental.
Steel Girder/Beamlinear ft.1,2801,08819200
Steel Protective Coatingsq. ft.23,48019,9563,52400
Steel Stringerlinear ft.4,4804,02046000
Steel Protective Coatingsq. ft.35,11031,5603,55000
Reinforced Concrete Decksq. ft.53,05349,8532,6605400
Wearing Surfacessq. ft.50,00045,0005,00000
Steel Floor Beamlinear ft.1,180930235150
Steel Protective Coatingsq. ft.20,85016,5504,2001000
Steel Columneach2424000
Steel Protective Coatingsq. ft.7,0005,9501,05000
Steel Pier Caplinear ft.882572225850
Steel Protective Coatingsq. ft.17,20010,9504,3001,9500
Open Jointlinear ft.1951851000
Bridge Rail
Steel or Aluminum Bridge Raillinear ft.1,5401,5301000
Reinforced Concrete Bridge Raillinear ft.1,5401,39015000