US Bridges

HWY Adams ST over TR Red Line Matt Conn

Fair

Suffolk County, Massachusetts · .3 MI S. JCT SR · Structure no. B161454VPMBTNBI

Built
1886
139 years old, rebuilt 1989
Condition
Fair
inspected February 2023
Type
Box Beam or Girders - Multiple
Prestressed Concrete
Length
58 ft
1 main span
Daily traffic
21,000
2013 count
Owner
State
Other State Agency

About this bridge

HWY Adams ST over TR Red Line Matt Conn is a prestressed concrete box beam or girders - multiple carrying HWY Adams ST over TR Red Line Matt Conn in Suffolk County, Massachusetts. It was built in 1886 and reconstructed in 1989, so it is 139 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 21,000 vehicles a day, roughly 8% of them trucks, projected to reach 14,056 by 2030. The structure is 58 ft (17.8 m) long and 50 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

CarriesHWY Adams ST
CrossesTR Red Line Matt Conn
Location.3 MI S. JCT SR
RouteCity Street 0
Coordinates42.2785, -71.06008
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 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation6: Equal to present minimum criteria
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Approach roadway alignment7: Better than present minimum criteria
Operating rating63.5 US tons
Inventory rating38 US tons

Structure

MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20
Structure length58 ft (17.8 m)
Longest span52 ft (16 m)
Deck width50 ft (15.2 m)
Roadway width34 ft (10.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic21,000 (2013)
Projected traffic14,056 by 2030
Trucks8%
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

OwnerOther State Agency
Maintained byState Highway Agency
Historic statusHistorical significance not determinable at this time
Work proposedWidening of existing bridge without deck rehabilitation
Estimated improvement cost$1.3 million (2025 estimate)
NavigationNot applicable (no waterway)

Frequently asked questions

When was HWY Adams ST over TR Red Line Matt Conn built?

It was built in 1886, making it 139 years old in 2025. It was reconstructed in 1989.

What condition is HWY Adams ST over TR Red Line Matt Conn 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 HWY Adams ST over TR Red Line Matt Conn carry?

About 21,000 vehicles per day (2013 count), of which roughly 8% are trucks.

How long is HWY Adams ST over TR Red Line Matt Conn?

The structure is 58 ft (17.8 m) long with a longest span of 52 ft (16 m) and a deck 50 ft wide.

Who owns HWY Adams ST over TR Red Line Matt Conn?

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