US Bridges

ST122 Main ST over Other Blackstone R Grnwy

Poor

Worcester County, Massachusetts · .1 MI S of Millville T.L. · Structure no. B1302223FDOT634

Built
1958
67 years old
Condition
Poor
inspected April 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
42 ft
1 main span
Daily traffic
3,804
2023 count
Owner
State
State Highway Agency

About this bridge

ST122 Main ST over Other Blackstone R Grnwy is a steel stringer/multi-beam or girder carrying ST122 Main ST over Other Blackstone R Grnwy in Worcester County, Massachusetts. It was built in 1958, so it is 67 years old, older than the Massachusetts average of 63.8 years.

The most recent inspection reported to the Federal Highway Administration rates it in poor condition with a lowest component rating of 4 out of 9. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.

It carries about 3,804 vehicles a day, roughly 6% of them trucks, projected to reach 6,475 by 2031. The structure is 42 ft (12.8 m) long and 50 ft wide. If it were closed, the detour would be 0.6 mi (1 km).

Location

Open in Google Maps
CarriesST122 Main ST
CrossesOther Blackstone R Grnwy
Location.1 MI S of Millville T.L.
RouteState Highway 122
CountyWorcester County
StateMassachusetts
Coordinates42.0198, -71.56251
Functional classUrban Minor Arterial

Condition and inspection

Poor

The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.

ComponentRatingMeaning
Deck4 PoorAdvanced section loss, deterioration, spalling or scour.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionApril 2024
Inspection intervalevery 12 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation6: Equal to present minimum criteria
Deck geometry6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating47.8 US tons
Inventory rating28.7 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans1
Design loadH 20
Structure length42 ft (12.8 m)
Longest span40 ft (12.2 m)
Deck width50 ft (15.2 m)
Roadway width41 ft (12.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic3,804 (2023)
Projected traffic6,475 by 2031
Trucks6%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesOther
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 statusNot eligible for the National Register of Historic Places
Work proposedRehabilitation because of general structure deterioration or inadequate strength
Estimated improvement cost$1.9 million (2025 estimate)
NavigationNot applicable (no waterway)

Frequently asked questions

When was ST122 Main ST over Other Blackstone R Grnwy built?

It was built in 1958, making it 67 years old in 2025.

What condition is ST122 Main ST over Other Blackstone R Grnwy in?

The National Bridge Inventory rates it in poor condition. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. The last reported inspection was in April 2024.

How much traffic does ST122 Main ST over Other Blackstone R Grnwy carry?

About 3,804 vehicles per day (2023 count), of which roughly 6% are trucks.

How long is ST122 Main ST over Other Blackstone R Grnwy?

The structure is 42 ft (12.8 m) long with a longest span of 40 ft (12.2 m) and a deck 50 ft wide.

Who owns ST122 Main ST over Other Blackstone R Grnwy?

It is owned by the State Highway Agency.