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US 20 N BEACON ST over WATER CHARLES RIVER

Map 

Coordinates:
+42.35861, -71.16194
42°21'31" N, 71°09'43" W
Source: National Bridge Inventory
Information not verified. Use at your own risk.

Facts 

Name:US 20 N BEACON ST over WATER CHARLES RIVER
Structure number:B160144F8DOTNBI
Old structure number:MDC896070101 (from 1992 edition)
Location:.1 MI N OF I 90
Purpose:Carries highway and pedestrian walkway over waterway
Route classification:Other Principal Arterial (Urban) [14]
Length of largest span:75.1 ft. [22.9 m]
Total length:205.1 ft. [62.5 m]
Roadway width between curbs:54.1 ft. [16.5 m]
Deck width edge-to-edge:79.1 ft. [24.1 m]
Vertical clearance below bridge:14.1 ft. [4.3 m]
Skew angle:20°
Owner:State Highway Agency [01]
Year built:1915
Historic significance:Historical significance is not determinable at this time [4]
Design load:M 18 / H 20 [4]
Number of main spans:3
Main spans material:Concrete [1]
Main spans design:Arch - Deck [11]
Deck type:Not applicable [N]

Latest Available Inspection: July 2015 

Status:Open, no restriction [A]
Average daily traffic:28,707 [as of 2015]
Truck traffic:4% of total traffic
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]
Water adequacy appraisal:Somewhat better than minimum adequacy to tolerate being left in place as is [5]
Roadway alignment appraisal:Meets minimum tolerable limits to be left in place as is [4]
Channel protection:Bank protection is in need of minor repairs. River control devices and embankment protection have a little minor damage. Banks and/or channel have minor amounts of drift. [7]
Pier/abutment protection:Navigation protection not required [1]
Scour condition:Bridge foundations determined to be stable for assessed or calculated scour conditions; field review indicates action is required. [4]
Operating rating:59.5 tons [54.1 metric tons]
Inventory rating:35.6 tons [32.4 metric tons]
Sufficiency rating:61.8
Recommended work:Bridge rehabilitation because of general structure deterioration or inadequate strength. [35]
Estimated cost of work:$8,549,000

Previous Inspections 

DateSuff. ratingEvaluationDeckSuper.Sub.ADT
July 201561.8Not deficient-FairFair28707
July 201361.5Not deficient-FairFair30500
July 201161.5Not deficient-FairFair30500
July 200963.1Not deficient-FairFair19900
July 199974.6Not deficient-SatisfactorySatisfactory19900
July 199575.8Not deficient-SatisfactorySatisfactory23108
July 199364.7Not deficient-FairFair19637
July 199164.7Not deficient-FairFair20000