US Bridges

ST 9 W Main ST over Water Seven Mile River

Fair

Worcester County, Massachusetts · O.1 Mi. East of ST-49 · Structure no. S230031L1DOTNBI

Built
1911
114 years old, rebuilt 1954
Condition
Fair
inspected March 2024
Type
Arch - Deck
Concrete
Length
81 ft
1 main span
Daily traffic
15,292
2022 count
Owner
State
State Highway Agency

About this bridge

ST 9 W Main ST over Water Seven Mile River is a concrete arch - deck carrying ST 9 W Main ST over Water Seven Mile River in Worcester County, Massachusetts. It was built in 1911 and reconstructed in 1954, so it is 114 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 5 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 15,292 vehicles a day, roughly 5% of them trucks, projected to reach 39,482 by 2033. The structure is 81 ft (24.6 m) long and 50 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

CarriesST 9 W Main ST
CrossesWater Seven Mile River
LocationO.1 Mi. East of ST-49
RouteState Highway 9
Coordinates42.23225, -72.01579
Functional classUrban Other Principal 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.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionMarch 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
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 rating70.7 US tons
Inventory rating42.1 US tons

Structure

Structure typeArch - Deck
MaterialConcrete
DeckConcrete, cast-in-place
Main spans1
Design loadH 20
Structure length81 ft (24.6 m)
Longest span42 ft (12.8 m)
Deck width50 ft (15.2 m)
Roadway width42 ft (12.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic15,292 (2022)
Projected traffic39,482 by 2033
Trucks5%
Lanes on structure3
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.7 mi (6 km)
TollOn a free road
National Highway SystemYes

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusHistorical significance not determinable at this time
Work proposedRehabilitation because of general structure deterioration or inadequate strength
Estimated improvement cost$3.7 million (2025 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was ST 9 W Main ST over Water Seven Mile River built?

It was built in 1911, making it 114 years old in 2025. It was reconstructed in 1954.

What condition is ST 9 W Main ST over Water Seven Mile 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 March 2024.

How much traffic does ST 9 W Main ST over Water Seven Mile River carry?

About 15,292 vehicles per day (2022 count), of which roughly 5% are trucks.

How long is ST 9 W Main ST over Water Seven Mile River?

The structure is 81 ft (24.6 m) long with a longest span of 42 ft (12.8 m) and a deck 50 ft wide.

Who owns ST 9 W Main ST over Water Seven Mile River?

It is owned by the State Highway Agency.