US Bridges

ST 12 Sthbridge ST over Water Dunns Pond Outlet

Fair

Worcester County, Massachusetts · .1 MI W of Auburn ST · Structure no. A170121YQDOTNBI

Built
1957
68 years old, rebuilt 2003
Condition
Fair
inspected May 2024
Type
Slab
Prestressed Concrete
Length
30 ft
1 main span
Daily traffic
9,506
2022 count
Owner
State
State Highway Agency

About this bridge

ST 12 Sthbridge ST over Water Dunns Pond Outlet is a prestressed concrete slab carrying ST 12 Sthbridge ST over Water Dunns Pond Outlet in Worcester County, Massachusetts. It was built in 1957 and reconstructed in 2003, 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 9,506 vehicles a day, roughly 10% of them trucks, projected to reach 64,120 by 2031. The structure is 30 ft (9.1 m) long and 62 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesST 12 Sthbridge ST
CrossesWater Dunns Pond Outlet
Location.1 MI W of Auburn ST
RouteState Highway 12
CountyWorcester County
StateMassachusetts
Coordinates42.20558, -71.83469
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.
Substructure7 GoodSome minor problems.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionMay 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 geometry3: Basically intolerable, requiring high priority of corrective action
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating89.3 US tons
Inventory rating53.6 US tons

Structure

Structure typeSlab
MaterialPrestressed Concrete
DeckConcrete, precast panels
Main spans1
Design loadHS 20
Structure length30 ft (9.1 m)
Longest span25 ft (7.6 m)
Deck width62 ft (18.9 m)
Roadway width50 ft (15.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic9,506 (2022)
Projected traffic64,120 by 2031
Trucks10%
Lanes on structure4
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.2 mi (2 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusPossibly eligible for the National Register; requires further investigation
Work proposedWidening of existing bridge without deck rehabilitation
Estimated improvement cost$1.6 million (2025 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was ST 12 Sthbridge ST over Water Dunns Pond Outlet built?

It was built in 1957, making it 68 years old in 2025. It was reconstructed in 2003.

What condition is ST 12 Sthbridge ST over Water Dunns Pond Outlet 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 May 2024.

How much traffic does ST 12 Sthbridge ST over Water Dunns Pond Outlet carry?

About 9,506 vehicles per day (2022 count), of which roughly 10% are trucks.

How long is ST 12 Sthbridge ST over Water Dunns Pond Outlet?

The structure is 30 ft (9.1 m) long with a longest span of 25 ft (7.6 m) and a deck 62 ft wide.

Who owns ST 12 Sthbridge ST over Water Dunns Pond Outlet?

It is owned by the State Highway Agency.