US Bridges

HWY Dartmouth ST over TR Comm Rail & Ol

Fair

Suffolk County, Massachusetts · Span 3-5 Back Bay Sta · Structure no. B160854V7MBTNBI

Built
1961
64 years old, rebuilt 1981
Condition
Fair
inspected March 2023
Type
Stringer/Multi-beam or Girder
Steel
Length
310 ft
3 main spans
Daily traffic
8,900
1997 count
Owner
State
Other State Agency

About this bridge

HWY Dartmouth ST over TR Comm Rail & Ol is a steel stringer/multi-beam or girder carrying HWY Dartmouth ST over TR Comm Rail & Ol in Suffolk County, Massachusetts. It was built in 1961 and reconstructed in 1981, so it is 64 years old, older than the Massachusetts average of 63.8 years.

The most recent inspection reported to the Federal Highway Administration rates it in fair condition with a lowest component rating of 5 out of 9. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

It carries about 8,900 vehicles a day, roughly 5% of them trucks, projected to reach 14,056 by 2032. The structure is 310 ft (94.4 m) long and 82 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesHWY Dartmouth ST
CrossesTR Comm Rail & Ol
LocationSpan 3-5 Back Bay Sta
RouteCity Street 0
CountySuffolk County
StateMassachusetts
Coordinates42.3477, -71.07617
Functional classUrban Minor Arterial

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionMarch 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry6: Equal to present minimum criteria
Approach roadway alignment2: Basically intolerable, requiring high priority of replacement
Operating rating60.2 US tons
Inventory rating36 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length310 ft (94.4 m)
Longest span72 ft (21.9 m)
Deck width82 ft (25.1 m)
Roadway width61 ft (18.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic8,900 (1997)
Projected traffic14,056 by 2032
Trucks5%
Lanes on structure4
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesRailroad
Detour if closed1.2 mi (2 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerOther State Agency
Maintained byOther State Agency
Historic statusHistorical significance not determinable at this time
Work proposedRehabilitation because of general structure deterioration or inadequate strength
Estimated improvement cost$23.2 million (2025 estimate)
NavigationNot applicable (no waterway)

Frequently asked questions

When was HWY Dartmouth ST over TR Comm Rail & Ol built?

It was built in 1961, making it 64 years old in 2025. It was reconstructed in 1981.

What condition is HWY Dartmouth ST over TR Comm Rail & Ol in?

The National Bridge Inventory rates it in fair condition. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound. The last reported inspection was in March 2023.

How much traffic does HWY Dartmouth ST over TR Comm Rail & Ol carry?

About 8,900 vehicles per day (1997 count), of which roughly 5% are trucks.

How long is HWY Dartmouth ST over TR Comm Rail & Ol?

The structure is 310 ft (94.4 m) long with a longest span of 72 ft (21.9 m) and a deck 82 ft wide.

Who owns HWY Dartmouth ST over TR Comm Rail & Ol?

It is owned by the Other State Agency.