US Bridges

ST 3 a over Water Fore River

Fair

Norfolk County, Massachusetts · At Weymouth Twn Line · Structure no. Q010015WJDOTNBI

Built
2018
7 years old
Condition
Fair
inspected October 2024
Type
Movable - Lift
Steel
Length
1,407 ft
1 main span
Daily traffic
46,164
2024 count
Owner
State
State Highway Agency

About this bridge

ST 3 a over Water Fore River is a steel movable - lift carrying ST 3 a over Water Fore River in Norfolk County, Massachusetts. It was built in 2018, so it is 7 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 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 46,164 vehicles a day, roughly 2% of them trucks. The structure is 1,407 ft (428.8 m) long and 74 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

Location

Open in Google Maps
CarriesST 3 a
CrossesWater Fore River
LocationAt Weymouth Twn Line
RouteState Highway 3A
CountyNorfolk County
StateMassachusetts
Coordinates42.24459, -70.9672
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
Deck7 GoodSome minor problems.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure7 GoodSome minor problems.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionOctober 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation6: Equal to present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating46.4 US tons
Inventory rating35.7 US tons

Structure

Structure typeMovable - Lift
MaterialSteel
DeckConcrete, cast-in-place
Main spans1 (+8 approach)
Design loadHL 93
Structure length1,407 ft (428.8 m)
Longest span324 ft (98.8 m)
Deck width74 ft (22.5 m)
Roadway width58 ft (17.7 m)
Vertical clearance over deck17 ft (5.1 m)

Traffic and service

Average daily traffic46,164 (2024)
Projected traffic—
Trucks2%
Lanes on structure4
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesHighway, waterway and railroad
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 statusHistorical significance not determinable at this time
Work proposedNone recorded
Estimated improvement cost—
NavigationNavigation control on waterway (bridge permit required)

Frequently asked questions

When was ST 3 a over Water Fore River built?

It was built in 2018, making it 7 years old in 2025.

What condition is ST 3 a over Water Fore River 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 October 2024.

How much traffic does ST 3 a over Water Fore River carry?

About 46,164 vehicles per day (2024 count), of which roughly 2% are trucks.

How long is ST 3 a over Water Fore River?

The structure is 1,407 ft (428.8 m) long with a longest span of 324 ft (98.8 m) and a deck 74 ft wide.

Who owns ST 3 a over Water Fore River?

It is owned by the State Highway Agency.