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I 93 SB B16-SB4 over COMB CAMBRIGE&MBTA/BMRR

Map

Coordinates:
+42.38278, -71.07694
42°22'58" N, 71°04'37" W

Facts

Source: National Bridge Inventory. Information not verified; use at your own risk.
Name:I 93 SB B16-SB4 over COMB CAMBRIGE&MBTA/BMRR
Structure number:B162813EGDOTNBI
Location:1.2 MI N OF JCT I93&US1
Purpose:Carries highway over highway and railroad
Route classification:Principal Arterial - Interstate (Urban) [11]
Length of largest span:212.0 ft. [64.6 m]
Total length:1214.0 ft. [370.0 m]
Roadway width between curbs:65.0 ft. [19.8 m]
Deck width edge-to-edge:71.2 ft. [21.7 m]
Vertical clearance above deck:15.1 ft. [4.6 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:11
Main spans material:Steel [3]
Main spans design:Stringer/Multi-beam or girder [02]
Deck type:Concrete Cast-in-Place [1]
Wearing surface:Bituminous [6]

Latest Available Inspection: July 2015

Good/Fair/Poor Condition:Fair
Status:Open, no restriction [A]
Average daily traffic:47,940 [as of 2012]
Truck traffic:12% of total traffic
Deck condition:Satisfactory [6 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:61.2 tons [55.6 metric tons]
Inventory rating:36.6 tons [33.3 metric tons]
Sufficiency rating:73.2
Recommended work:Bridge rehabilitation because of general structure deterioration or inadequate strength. [35]
Estimated cost of work:$45,323,000

Previous Inspections

DateSuff. RatingConditionDeckSuperstructureSubstructureSD/FOADT
July 201573.2FairSatisfactoryFairFairFO47940
July 201373.2FairSatisfactoryFairFairFO47940
April 201169.8FairSatisfactoryFairFairFO75900
January 200969.8FairSatisfactoryFairFairFO75900

Element Data

Source: National Bridge Elements dataset, 2016 edition. This feature is experimental.
ElementUnitsQuantity1. Good2. Fair3. Poor4. Serious
Superstructure
Steel Girder/Beamlinear ft.11,4487,7883,1605000
Steel Protective Coatingsq. ft.168,604114,98446,3207,3000
Deck
Reinforced Concrete Decksq. ft.92,30492,301210
Wearing Surfacessq. ft.83,89783,79710000
Substructure
Steel Columneach32101840
Steel Protective Coatingsq. ft.12,8463,5537,2931,0001,000
Reinforced Concrete Pier Walllinear ft.963320430
Concrete Protective Coatingsq. ft.2,618002,6180
Steel Pier Caplinear ft.1,2673005674000
Steel Protective Coatingsq. ft.33,9385,35420,5848,0000
Reinforced Concrete Pier Caplinear ft.1391241500
Concrete Protective Coatingsq. ft.1,939001,9390
Joints
Strip Seal Jointlinear ft.201002010
Compression Jointlinear ft.64263800
Open Jointlinear ft.211021100
Bearings
Movable Bearingeach88000
Steel Protective Coatingsq. ft.6464000
Fixed Bearingeach2424000
Steel Protective Coatingsq. ft.9696000
Bridge Rail
Steel or Aluminum Bridge Raillinear ft.2,4022,3570450