ST128 over ST 97 CABOT ST


+42.57436, -70.89525
42°34'28" N, 70°53'43" W


Source: National Bridge Inventory. Information not verified; use at your own risk.
Name:ST128 over ST 97 CABOT ST
Structure number:B110092TWDOTNBI
Old structure number:2TW050503007101 (from 1992 edition)
Location:ST 97 & ST 128
Purpose:Carries highway and pedestrian walkway over highway
Route classification:Principal Arterial - Other Freeways or Expressways (Urban) [12]
Length of largest span:57.1 ft. [17.4 m]
Total length:62.0 ft. [18.9 m]
Roadway width between curbs:72.5 ft. [22.1 m]
Deck width edge-to-edge:86.3 ft. [26.3 m]
Vertical clearance below bridge:13.1 ft. [4.0 m]
Skew angle:11°
Owner:State Highway Agency [01]
Year built:1947
Historic significance:Bridge is possibly eligible for the National Register of Historic Places [3]
Design load:M 18 / H 20 [4]
Main span material:Concrete [1]
Main span design:Frame [07]
Deck type:Not applicable [N]

Latest Available Inspection: December 2017

Good/Fair/Poor Condition:Fair
Status:Open, no restriction [A]
Average daily traffic:53,600 [as of 2017]
Truck traffic:10% of total traffic
Superstructure condition:Satisfactory [6 out of 9]
Substructure condition:Satisfactory [6 out of 9]
Structural appraisal:Equal to present minimum criteria [6]
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:Equal to present minimum criteria [6]
Scour condition:Bridge not over waterway. [N]
Sufficiency rating:84.9
Recommended work:Widening of existing bridge or other major structure without deck rehabilitation or replacement [33]
Estimated cost of work:$875,000

Previous Inspections

DateConditionDeckSuperstructureSubstructureADTSuff. Rating
December 2017Fair-SatisfactorySatisfactory5360084.9
December 2015Fair-SatisfactorySatisfactory5650084.5
December 2013Fair-SatisfactoryGood5650085.5
December 2011Fair-SatisfactoryGood4586089.2
December 2009Fair-SatisfactoryGood6730086.1
December 1999Good-GoodGood6984083.7
February 1998Good-GoodVery Good6984071.1
February 1996Good-Very GoodVery Good6984071.6
February 1992Good-Very GoodVery Good4478587.0

Element Data

Source: National Bridge Elements dataset, 2019 edition. This feature is experimental.
Reinforced Concrete Archlinear ft.5705700
Wearing Surfacessq. ft.4,1654,165000
Reinforced Concrete Abutmentlinear ft.180177210
Bridge Rail
Steel or Aluminum Bridge Raillinear ft.114000114
Steel Protective Coatingsq. ft.728000728
Reinforced Concrete Bridge Raillinear ft.114565800