US Bridges

HWY Washngton ST over RR MBTA

Fair

Suffolk County, Massachusetts · Near Dorchester · Structure no. B1615838JMUNNBI

Built
1933
92 years old, rebuilt 1965
Condition
Fair
inspected February 2024
Type
Slab
Prestressed Concrete
Length
41 ft
1 main span
Daily traffic
22,000
2024 count
Owner
City
City or Municipal Highway Agency

About this bridge

HWY Washngton ST over RR MBTA is a prestressed concrete slab carrying HWY Washngton ST over RR MBTA in Suffolk County, Massachusetts. It was built in 1933 and reconstructed in 1965, so it is 92 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 6 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 22,000 vehicles a day, roughly 6% of them trucks, projected to reach 54,486 by 2033. The structure is 41 ft (12.5 m) long and 63 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesHWY Washngton ST
CrossesRR MBTA
LocationNear Dorchester
RouteCity Street 0
CountySuffolk County
StateMassachusetts
Coordinates42.30318, -71.0784
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.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionFebruary 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation6: Equal to present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Approach roadway alignment6: Equal to present minimum criteria
Operating rating60.5 US tons
Inventory rating27.8 US tons

Structure

Structure typeSlab
MaterialPrestressed Concrete
DeckConcrete, precast panels
Main spans1
Design loadUnknown
Structure length41 ft (12.5 m)
Longest span36 ft (11 m)
Deck width63 ft (19.2 m)
Roadway width40 ft (12.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic22,000 (2024)
Projected traffic54,486 by 2033
Trucks6%
Lanes on structure2
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

OwnerCity or Municipal Highway Agency
Maintained byCity or Municipal Highway Agency
Historic statusHistorical significance not determinable at this time
Work proposedRehabilitation because of general structure deterioration or inadequate strength
Estimated improvement cost$2.4 million (2025 estimate)
NavigationNot applicable (no waterway)

Frequently asked questions

When was HWY Washngton ST over RR MBTA built?

It was built in 1933, making it 92 years old in 2025. It was reconstructed in 1965.

What condition is HWY Washngton ST over RR MBTA 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 February 2024.

How much traffic does HWY Washngton ST over RR MBTA carry?

About 22,000 vehicles per day (2024 count), of which roughly 6% are trucks.

How long is HWY Washngton ST over RR MBTA?

The structure is 41 ft (12.5 m) long with a longest span of 36 ft (11 m) and a deck 63 ft wide.

Who owns HWY Washngton ST over RR MBTA?

It is owned by the City or Municipal Highway Agency.