US Bridges

ST122 Main ST over Water Blackstone Canal

Fair

Worcester County, Massachusetts · 1.2MI. N. of R.I. Line · Structure no. B13004202DOTNBI

Built
1913
112 years old
Condition
Fair
inspected May 2024
Type
Arch - Deck
Concrete
Length
69 ft
1 main span
Daily traffic
9,440
2024 count
Owner
State
State Highway Agency

About this bridge

ST122 Main ST over Water Blackstone Canal is a concrete arch - deck carrying ST122 Main ST over Water Blackstone Canal in Worcester County, Massachusetts. It was built in 1913, so it is 112 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 9,440 vehicles a day, roughly 3% of them trucks, projected to reach 12,634 by 2031. The structure is 69 ft (21 m) long and 40 ft wide. If it were closed, the detour would be 0.6 mi (1 km).

Location

Open in Google Maps
CarriesST122 Main ST
CrossesWater Blackstone Canal
Location1.2MI. N. of R.I. Line
RouteState Highway 122
CountyWorcester County
StateMassachusetts
Coordinates42.01804, -71.55271
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
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 inspectionMay 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; action required to protect exposed foundations
Structural evaluation6: Equal to present minimum criteria
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating110.1 US tons
Inventory rating98.9 US tons

Structure

Structure typeArch - Deck
MaterialConcrete
DeckNot applicable
Main spans1
Design loadUnknown
Structure length69 ft (21 m)
Longest span69 ft (21 m)
Deck width40 ft (12.3 m)
Roadway width32 ft (9.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic9,440 (2024)
Projected traffic12,634 by 2031
Trucks3%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed0.6 mi (1 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$1.9 million (2025 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was ST122 Main ST over Water Blackstone Canal built?

It was built in 1913, making it 112 years old in 2025.

What condition is ST122 Main ST over Water Blackstone Canal 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 ST122 Main ST over Water Blackstone Canal carry?

About 9,440 vehicles per day (2024 count), of which roughly 3% are trucks.

How long is ST122 Main ST over Water Blackstone Canal?

The structure is 69 ft (21 m) long with a longest span of 69 ft (21 m) and a deck 40 ft wide.

Who owns ST122 Main ST over Water Blackstone Canal?

It is owned by the State Highway Agency.