US Bridges

HWY Dorchstr Ave over RR MBTA Spur

Poor

Suffolk County, Massachusetts · Over Red Line · Structure no. B161298RRMBTNBI

Built
1925
100 years old
Condition
Poor
inspected December 2020
Type
Stringer/Multi-beam or Girder
Steel
Length
39 ft
1 main span
Daily traffic
11,800
2013 count
Owner
State
Other State Agency

About this bridge

HWY Dorchstr Ave over RR MBTA Spur is a steel stringer/multi-beam or girder carrying HWY Dorchstr Ave over RR MBTA Spur in Suffolk County, Massachusetts. It was built in 1925, so it is 100 years old, older than the Massachusetts average of 63.8 years.

The most recent inspection reported to the Federal Highway Administration rates it in poor condition with a lowest component rating of 4 out of 9. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.

It carries about 11,800 vehicles a day, roughly 4% of them trucks. The structure is 39 ft (11.9 m) long and 60 ft wide.

Location

Open in Google Maps
CarriesHWY Dorchstr Ave
CrossesRR MBTA Spur
LocationOver Red Line
RouteCity Street 0
CountySuffolk County
StateMassachusetts
Coordinates42.32635, -71.05693
Functional classUrban Other Principal Arterial

Condition and inspection

Poor

The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.

ComponentRatingMeaning
Deck4 PoorAdvanced section loss, deterioration, spalling or scour.
Superstructure4 PoorAdvanced section loss, deterioration, spalling or scour.
Substructure4 PoorAdvanced section loss, deterioration, spalling or scour.
Last inspectionDecember 2020
Inspection intervalevery 12 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation4: Meets minimum tolerable limits to be left in place as is
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Approach roadway alignment6: Equal to present minimum criteria
Operating rating40.3 US tons
Inventory rating24.3 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans1
Design loadH 20
Structure length39 ft (11.9 m)
Longest span32 ft (9.8 m)
Deck width60 ft (18.3 m)
Roadway width40 ft (12.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic11,800 (2013)
Projected traffic—
Trucks4%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesThird level (interchange)
CrossesRailroad
Detour if closed—
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerOther State Agency
Maintained byState Highway Agency
Historic statusHistorical significance not determinable at this time
Work proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$4.8 million (2025 estimate)
NavigationNot applicable (no waterway)

Frequently asked questions

When was HWY Dorchstr Ave over RR MBTA Spur built?

It was built in 1925, making it 100 years old in 2025.

What condition is HWY Dorchstr Ave over RR MBTA Spur in?

The National Bridge Inventory rates it in poor condition. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. The last reported inspection was in December 2020.

How much traffic does HWY Dorchstr Ave over RR MBTA Spur carry?

About 11,800 vehicles per day (2013 count), of which roughly 4% are trucks.

How long is HWY Dorchstr Ave over RR MBTA Spur?

The structure is 39 ft (11.9 m) long with a longest span of 32 ft (9.8 m) and a deck 60 ft wide.

Who owns HWY Dorchstr Ave over RR MBTA Spur?

It is owned by the Other State Agency and maintained by the State Highway Agency.