US Bridges

ST140 over RR Amtrak/Mbta

Fair

Bristol County, Massachusetts · 1.5 MI NW of I 495 · Structure no. M030293P3DOTNBI

Built
1980
45 years old
Condition
Fair
inspected February 2023
Type
Box Beam or Girders - Multiple
Prestressed Concrete
Length
88 ft
1 main span
Daily traffic
19,746
2021 count
Owner
State
State Highway Agency

About this bridge

ST140 over RR Amtrak/Mbta is a prestressed concrete box beam or girders - multiple carrying ST140 over RR Amtrak/Mbta in Bristol County, Massachusetts. It was built in 1980, so it is 45 years old, younger 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 19,746 vehicles a day, roughly 10% of them trucks, projected to reach 47,379 by 2032. The structure is 88 ft (26.8 m) long and 121 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

Location

Open in Google Maps
CarriesST140
CrossesRR Amtrak/Mbta
Location1.5 MI NW of I 495
RouteState Highway 140
CountyBristol County
StateMassachusetts
Coordinates42.01988, -71.22903
Functional classUrban Other Principal 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.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionFebruary 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 geometry9: Superior to present desirable criteria
Approach roadway alignment9: Superior to present desirable criteria
Operating rating80.4 US tons
Inventory rating54.7 US tons

Structure

Structure typeBox Beam or Girders - Multiple
MaterialPrestressed Concrete
DeckConcrete, precast panels
Main spans1
Design loadHS 20
Structure length88 ft (26.8 m)
Longest span85 ft (25.9 m)
Deck width121 ft (36.9 m)
Roadway width88 ft (26.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic19,746 (2021)
Projected traffic47,379 by 2032
Trucks10%
Lanes on structure5
Traffic directionTwo-way traffic
CarriesHighway
CrossesRailroad
Detour if closed3.1 mi (5 km)
TollOn a free road
National Highway SystemYes

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedRehabilitation because of general structure deterioration or inadequate strength
Estimated improvement cost$9.7 million (2025 estimate)
NavigationNot applicable (no waterway)

Frequently asked questions

When was ST140 over RR Amtrak/Mbta built?

It was built in 1980, making it 45 years old in 2025.

What condition is ST140 over RR Amtrak/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 2023.

How much traffic does ST140 over RR Amtrak/Mbta carry?

About 19,746 vehicles per day (2021 count), of which roughly 10% are trucks.

How long is ST140 over RR Amtrak/Mbta?

The structure is 88 ft (26.8 m) long with a longest span of 85 ft (25.9 m) and a deck 121 ft wide.

Who owns ST140 over RR Amtrak/Mbta?

It is owned by the State Highway Agency.