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I 93 NB B5-B10 over COMB MBTA & I 93 SB

Map

Coordinates:
+42.38139, -71.07667
42°22'53" N, 71°04'36" W

Facts

Source: National Bridge Inventory. Information not verified; use at your own risk.
Name:I 93 NB B5-B10 over COMB MBTA & I 93 SB
Structure number:B162813DYDOTNBI
Location:.8 MI N OF RAMP I93&US1
Purpose:Carries highway over highway and railroad
Route classification:Principal Arterial - Interstate (Urban) [11]
Length of largest span:139.1 ft. [42.4 m]
Total length:549.9 ft. [167.6 m]
Roadway width between curbs:57.1 ft. [17.4 m]
Deck width edge-to-edge:62.0 ft. [18.9 m]
Vertical clearance below bridge:16.7 ft. [5.1 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:5
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 2015

Good/Fair/Poor Condition:Fair
Status:Open, no restriction [A]
Average daily traffic:47,940 [as of 2015]
Truck traffic:9% of total traffic
Deck condition:Satisfactory [6 out of 9]
Superstructure condition:Satisfactory [6 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:Better than present minimum criteria [7]
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:51.3 tons [46.6 metric tons]
Inventory rating:30.7 tons [27.9 metric tons]
Sufficiency rating:74.2
Recommended work:Bridge rehabilitation because of general structure deterioration or inadequate strength. [35]
Estimated cost of work:$17,876,000

Previous Inspections

DateSuff. RatingConditionDeckSuperstructureSubstructureSD/FOADT
April 201574.2FairSatisfactorySatisfactoryFairFO47940
April 201374.2FairSatisfactorySatisfactoryFairFO47940
March 201172.8FairSatisfactoryFairFairFO59900
April 200872.8FairSatisfactoryFairFairFO59900

Element Data

Source: National Bridge Elements dataset, 2016 edition. This feature is experimental.
ElementUnitsQuantity1. Good2. Fair3. Poor4. Serious
Superstructure
Steel Girder/Beamlinear ft.2,7262,076624260
Steel Protective Coatingsq. ft.1,9981,998000
Steel Stringerlinear ft.1,58895363500
Steel Protective Coatingsq. ft.1,9981,998000
Deck
Reinforced Concrete Decksq. ft.31,39029,8201,57000
Wearing Surfacessq. ft.31,38829,8191,56900
Superstructure
Steel Floor Beamlinear ft.29930239300
Steel Protective Coatingsq. ft.999999000
Substructure
Steel Columneach1816200
Steel Protective Coatingsq. ft.1,9981,998000
Steel Pier Caplinear ft.3641501841812
Steel Protective Coatingsq. ft.1,9981,998000
Joints
Open Jointlinear ft.1511133800
Bridge Rail
Steel or Aluminum Bridge Raillinear ft.899719013545
Reinforced Concrete Bridge Raillinear ft.899629180900