US Bridges

ST146 over Water Singletary Brook

Fair

Worcester County, Massachusetts · .1 MI S of W Main St. · Structure no. M220211MEDOTNBI

Built
1936
89 years old
Condition
Fair
inspected August 2023
Type
Arch - Deck
Concrete
Length
20 ft
1 main span
Daily traffic
37,631
2022 count
Owner
State
State Highway Agency

About this bridge

ST146 over Water Singletary Brook is a concrete arch - deck carrying ST146 over Water Singletary Brook in Worcester County, Massachusetts. It was built in 1936, so it is 89 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 37,631 vehicles a day, roughly 9% of them trucks, projected to reach 71,068 by 2032. The structure is 20 ft (6.1 m) long and 97 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesST146
CrossesWater Singletary Brook
Location.1 MI S of W Main St.
RouteState Highway 146
CountyWorcester County
StateMassachusetts
Coordinates42.18471, -71.76335
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
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 protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionAugust 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; action required to protect exposed foundations
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry2: Basically intolerable, requiring high priority of replacement
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating110.1 US tons
Inventory rating72.8 US tons

Structure

Structure typeArch - Deck
MaterialConcrete
DeckNot applicable
Main spans1
Design loadH 20
Structure length20 ft (6.1 m)
Longest span20 ft (6.1 m)
Deck width97 ft (29.6 m)
Roadway width61 ft (18.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic37,631 (2022)
Projected traffic71,068 by 2032
Trucks9%
Lanes on structure6
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed1.2 mi (2 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$2 million (2025 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was ST146 over Water Singletary Brook built?

It was built in 1936, making it 89 years old in 2025.

What condition is ST146 over Water Singletary Brook 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 August 2023.

How much traffic does ST146 over Water Singletary Brook carry?

About 37,631 vehicles per day (2022 count), of which roughly 9% are trucks.

How long is ST146 over Water Singletary Brook?

The structure is 20 ft (6.1 m) long with a longest span of 20 ft (6.1 m) and a deck 97 ft wide.

Who owns ST146 over Water Singletary Brook?

It is owned by the State Highway Agency.