US Bridges

ST 3 over HWY Liberty ST

Fair

Norfolk County, Massachusetts · 1.3 KM W. of Weymouth · Structure no. B2103634HDOTNBI

Built
1957
68 years old, rebuilt 1978
Condition
Fair
inspected January 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
65 ft
1 main span
Daily traffic
99,663
2024 count
Owner
State
State Highway Agency

About this bridge

ST 3 over HWY Liberty ST is a steel stringer/multi-beam or girder carrying ST 3 over HWY Liberty ST in Norfolk County, Massachusetts. It was built in 1957 and reconstructed in 1978, so it is 68 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 99,663 vehicles a day, roughly 5% of them trucks, projected to reach 229,946 by 2033. The structure is 65 ft (19.7 m) long and 118 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

Location

Open in Google Maps
CarriesST 3
CrossesHWY Liberty ST
Location1.3 KM W. of Weymouth
RouteState Highway 3
CountyNorfolk County
StateMassachusetts
Coordinates42.20329, -70.98487
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 inspectionJanuary 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 alignment8: Equal to present desirable criteria
Operating rating80.2 US tons
Inventory rating48.1 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20
Structure length65 ft (19.7 m)
Longest span59 ft (18.1 m)
Deck width118 ft (36.1 m)
Roadway width109 ft (33.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic99,663 (2024)
Projected traffic229,946 by 2033
Trucks5%
Lanes on structure8
Traffic directionTwo-way traffic
CarriesHighway
CrossesHighway
Detour if closed3.7 mi (6 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 proposedWidening of existing bridge without deck rehabilitation
Estimated improvement cost$1.7 million (2025 estimate)
NavigationNot applicable (no waterway)

Frequently asked questions

When was ST 3 over HWY Liberty ST built?

It was built in 1957, making it 68 years old in 2025. It was reconstructed in 1978.

What condition is ST 3 over HWY Liberty ST 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 January 2024.

How much traffic does ST 3 over HWY Liberty ST carry?

About 99,663 vehicles per day (2024 count), of which roughly 5% are trucks.

How long is ST 3 over HWY Liberty ST?

The structure is 65 ft (19.7 m) long with a longest span of 59 ft (18.1 m) and a deck 118 ft wide.

Who owns ST 3 over HWY Liberty ST?

It is owned by the State Highway Agency.