US Bridges

ST138 Weir ST over Water Mill River

FairPosted for load

Bristol County, Massachusetts · .1 MI S of US 44 · Structure no. T010123WFDOTNBI

Built
1947
78 years old
Condition
Fair
inspected July 2023
Type
Tee Beam
Concrete
Length
41 ft
1 main span
Daily traffic
16,422
2023 count
Owner
State
State Highway Agency

About this bridge

ST138 Weir ST over Water Mill River is a concrete tee beam carrying ST138 Weir ST over Water Mill River in Bristol County, Massachusetts. It was built in 1947, so it is 78 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 5 out of 9. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound. Its operating status is: posted for load restriction.

It carries about 16,422 vehicles a day, roughly 11% of them trucks, projected to reach 28,427 by 2032. The structure is 41 ft (12.5 m) long and 61 ft wide.

Location

Open in Google Maps
CarriesST138 Weir ST
CrossesWater Mill River
Location.1 MI S of US 44
RouteState Highway 138
CountyBristol County
StateMassachusetts
Coordinates41.90012, -71.09228
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
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionJuly 2023
Inspection intervalevery 12 months
Operating statusPosted for load restriction
ScourScour critical; foundations unstable for calculated scour conditions
Structural evaluation4: Meets minimum tolerable limits to be left in place as is
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating40.5 US tons
Inventory rating19.3 US tons

Structure

Structure typeTee Beam
MaterialConcrete
DeckConcrete, cast-in-place
Main spans1
Design loadH 20
Structure length41 ft (12.5 m)
Longest span35 ft (10.7 m)
Deck width61 ft (18.5 m)
Roadway width40 ft (12.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic16,422 (2023)
Projected traffic28,427 by 2032
Trucks11%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed—
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusHistorical significance not determinable at this time
Work proposedRehabilitation because of general structure deterioration or inadequate strength
Estimated improvement cost$2.3 million (2025 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was ST138 Weir ST over Water Mill River built?

It was built in 1947, making it 78 years old in 2025.

What condition is ST138 Weir ST over Water Mill 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 July 2023.

How much traffic does ST138 Weir ST over Water Mill River carry?

About 16,422 vehicles per day (2023 count), of which roughly 11% are trucks.

How long is ST138 Weir ST over Water Mill River?

The structure is 41 ft (12.5 m) long with a longest span of 35 ft (10.7 m) and a deck 61 ft wide.

Who owns ST138 Weir ST over Water Mill River?

It is owned by the State Highway Agency.