I 93 SB B10-B16 over RR MBTA/BMRR


+42.38222, -71.07694
42°22'56" N, 71°04'37" W


Source: National Bridge Inventory. Information not verified; use at your own risk.
Name:I 93 SB B10-B16 over RR MBTA/BMRR
Structure number:B162813EEDOTNBI
Location:1 MI N OF JCT I93&US1
Purpose:Carries highway over railroad
Route classification:Principal Arterial - Interstate (Urban) [11]
Length of largest span:76.1 ft. [23.2 m]
Total length:442.0 ft. [134.7 m]
Roadway width between curbs:44.9 ft. [13.7 m]
Deck width edge-to-edge:57.1 ft. [17.4 m]
Vertical clearance above deck:17.1 ft. [5.2 m]
Vertical clearance below bridge:35.1 ft. [10.7 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+Mod / HS 20+Mod [6]
Number of main spans:6
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: July 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: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:Somewhat better than minimum adequacy to tolerate being left in place as is [5]
Roadway alignment appraisal:Better than present minimum criteria [7]
Scour condition:Bridge not over waterway. [N]
Operating rating:55.4 tons [50.4 metric tons]
Inventory rating:33.2 tons [30.2 metric tons]
Sufficiency rating:77.5
Recommended work:Bridge rehabilitation because of general structure deterioration or inadequate strength. [35]
Estimated cost of work:$13,225,000

Previous Inspections

DateSuff. RatingConditionDeckSuperstructureSubstructureSD/FOADT
July 201577.5FairSatisfactoryFairFair-47940
July 201375.3FairSatisfactoryFairFair-47940
March 201172.9FairSatisfactoryFairFair-68700
June 200872.9FairSatisfactoryFairFair-68700

Element Data

Source: National Bridge Elements dataset, 2016 edition. This feature is experimental.
ElementUnitsQuantity1. Good2. Fair3. Poor4. Serious
Steel Girder/Beamlinear ft.1,7981,611142450
Steel Protective Coatingsq. ft.26,02123,7711,1601,0900
Steel Stringerlinear ft.1,7711,771000
Steel Protective Coatingsq. ft.12,32512,325000
Reinforced Concrete Decksq. ft.25,92125,8715000
Wearing Surfacessq. ft.22,73722,63710000
Steel Floor Beamlinear ft.4023920100
Steel Protective Coatingsq. ft.5,0204,89512500
Steel Columneach1814040
Steel Protective Coatingsq. ft.37,40637,3580480
Steel Pier Caplinear ft.5873671356025
Steel Protective Coatingsq. ft.15,6419,5414,3271,305468
Open Jointlinear ft.150149100
Bridge Rail
Other Material Bridge Raillinear ft.8838560270