US Bridges

ST122 A/Main ST over Water Blackstone River

Fair

Worcester County, Massachusetts · At Corner of Cross Street · Structure no. G080091YWDOTNBI

Built
1957
68 years old
Condition
Fair
inspected June 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
87 ft
1 main span
Daily traffic
4,452
2023 count
Owner
State
State Highway Agency

About this bridge

ST122 A/Main ST over Water Blackstone River is a steel stringer/multi-beam or girder carrying ST122 A/Main ST over Water Blackstone River in Worcester County, Massachusetts. It was built in 1957, 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 4,452 vehicles a day, roughly 7% of them trucks, projected to reach 6,791 by 2031. The structure is 87 ft (26.5 m) long and 58 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

Open in Google Maps
CarriesST122 A/Main ST
CrossesWater Blackstone River
LocationAt Corner of Cross Street
RouteState Highway 122A
CountyWorcester County
StateMassachusetts
Coordinates42.17716, -71.68802
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.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionJune 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 geometry7: Better than present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating73.5 US tons
Inventory rating44.1 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans1
Design loadH 20
Structure length87 ft (26.5 m)
Longest span84 ft (25.6 m)
Deck width58 ft (17.7 m)
Roadway width44 ft (13.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic4,452 (2023)
Projected traffic6,791 by 2031
Trucks7%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed1.9 mi (3 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedOther structural work, including hydraulic replacements
Estimated improvement cost$932,000 (2025 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was ST122 A/Main ST over Water Blackstone River built?

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

What condition is ST122 A/Main ST over Water Blackstone 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 June 2024.

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

About 4,452 vehicles per day (2023 count), of which roughly 7% are trucks.

How long is ST122 A/Main ST over Water Blackstone River?

The structure is 87 ft (26.5 m) long with a longest span of 84 ft (25.6 m) and a deck 58 ft wide.

Who owns ST122 A/Main ST over Water Blackstone River?

It is owned by the State Highway Agency.