US Bridges

ST122 Main ST over Water Blackstone River

Good

Worcester County, Massachusetts · 2.2MI.NTH of Millville Tl · Structure no. U02001B9NDOTNBI

Built
2012
13 years old
Condition
Good
inspected February 2025
Type
Stringer/Multi-beam or Girder
Steel
Length
116 ft
1 main span
Daily traffic
4,318
2023 count
Owner
State
State Highway Agency

About this bridge

ST122 Main ST over Water Blackstone River is a steel stringer/multi-beam or girder carrying ST122 Main ST over Water Blackstone River in Worcester County, Massachusetts. It was built in 2012, so it is 13 years old, younger than the Massachusetts average of 63.8 years.

The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 4,318 vehicles a day, roughly 7% of them trucks. The structure is 116 ft (35.5 m) long and 50 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

CarriesST122 Main ST
CrossesWater Blackstone River
Location2.2MI.NTH of Millville Tl
RouteState Highway 122
Coordinates42.05495, -71.61627
Functional classUrban Minor Arterial

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection7 GoodSome minor problems.
Last inspectionFebruary 2025
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating53.6 US tons
Inventory rating46.4 US tons

Structure

MaterialSteel
DeckConcrete, precast panels
Main spans1
Design loadHL 93
Structure length116 ft (35.5 m)
Longest span112 ft (34.1 m)
Deck width50 ft (15.1 m)
Roadway width40 ft (12.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic4,318 (2023)
Projected traffic—
Trucks7%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed3.7 mi (6 km)
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 proposedWidening of existing bridge without deck rehabilitation
Estimated improvement cost$1.1 million (2025 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was ST122 Main ST over Water Blackstone River built?

It was built in 2012, making it 13 years old in 2025.

What condition is ST122 Main ST over Water Blackstone River in?

The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in February 2025.

How much traffic does ST122 Main ST over Water Blackstone River carry?

About 4,318 vehicles per day (2023 count), of which roughly 7% are trucks.

How long is ST122 Main ST over Water Blackstone River?

The structure is 116 ft (35.5 m) long with a longest span of 112 ft (34.1 m) and a deck 50 ft wide.

Who owns ST122 Main ST over Water Blackstone River?

It is owned by the State Highway Agency.