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


+42.37611, -71.07361
42°22'34" N, 71°04'25" 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:14.8 ft. [4.5 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]
Operating rating:58.4 tons [53.1 metric tons]
Inventory rating:35.0 tons [31.8 metric tons]
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

DateSuff. RatingConditionDeckSuperstructureSubstructureSD/FOADT
March 201670.6FairFairFairFairFO58900
March 201469.9FairSatisfactoryFairFairFO74200
March 201269.9FairSatisfactoryFairFairFO74200
March 201070.0FairSatisfactorySatisfactoryFairFO74200
March 200870.0FairSatisfactorySatisfactoryFairFO74200

Element Data

Source: National Bridge Elements dataset, 2016 edition. This feature is experimental.
ElementUnitsQuantity1. Good2. Fair3. Poor4. Serious
Steel Girder/Beamlinear ft.1,306642588760
Steel Protective Coatingsq. ft.1,9981,998000
Steel Stringerlinear ft.4,5643,1119554980
Steel Protective Coatingsq. ft.1,9981,998000
Reinforced Concrete Decksq. ft.42,05839,9552,10300
Wearing Surfacessq. ft.40,75238,7142,03800
Steel Floor Beamlinear ft.99144619824899
Steel Protective Coatingsq. ft.999999000
Steel Columneach2412660
Steel Protective Coatingsq. ft.1,9981,998000
Steel Pier Caplinear ft.7682394021252
Steel Protective Coatingsq. ft.2,9972,997000
Open Jointlinear ft.187187000
Bridge Rail
Reinforced Concrete Bridge Raillinear ft.1,3061,2416500