US Bridges

ST 31 State RD over Water Willard Brook

Fair

Middlesex County, Massachusetts · At ST 119 Intersection · Structure no. A12002285DOTNBI

Built
1908
117 years old, rebuilt 1932
Condition
Fair
inspected February 2025
Type
Arch - Deck
Concrete
Length
39 ft
1 main span
Daily traffic
4,671
2021 count
Owner
State
State Highway Agency

About this bridge

ST 31 State RD over Water Willard Brook is a concrete arch - deck carrying ST 31 State RD over Water Willard Brook in Middlesex County, Massachusetts. It was built in 1908 and reconstructed in 1932, so it is 117 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. Its operating status is: open, would be posted or closed except for temporary shoring.

It carries about 4,671 vehicles a day, roughly 6% of them trucks, projected to reach 9,634 by 2032. The structure is 39 ft (11.9 m) long and 45 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

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CarriesST 31 State RD
CrossesWater Willard Brook
LocationAt ST 119 Intersection
RouteState Highway 119
CountyMiddlesex County
StateMassachusetts
Coordinates42.6629, -71.79831
Functional classRural 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 protection7 GoodSome minor problems.
Last inspectionFebruary 2025
Inspection intervalevery 24 months
Operating statusOpen, would be posted or closed except for temporary shoring
ScourFoundations stable; action required to protect exposed foundations
Structural evaluation6: Equal to present minimum criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating110.1 US tons
Inventory rating105.1 US tons

Structure

Structure typeArch - Deck
MaterialConcrete
DeckNot applicable
Main spans1
Design loadH 20
Structure length39 ft (11.9 m)
Longest span30 ft (9.1 m)
Deck width45 ft (13.7 m)
Roadway width40 ft (12.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic4,671 (2021)
Projected traffic9,634 by 2032
Trucks6%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.2 mi (2 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 proposedWidening of existing bridge without deck rehabilitation
Estimated improvement cost$338,000 (2025 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was ST 31 State RD over Water Willard Brook built?

It was built in 1908, making it 117 years old in 2025. It was reconstructed in 1932.

What condition is ST 31 State RD over Water Willard 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 February 2025.

How much traffic does ST 31 State RD over Water Willard Brook carry?

About 4,671 vehicles per day (2021 count), of which roughly 6% are trucks.

How long is ST 31 State RD over Water Willard Brook?

The structure is 39 ft (11.9 m) long with a longest span of 30 ft (9.1 m) and a deck 45 ft wide.

Who owns ST 31 State RD over Water Willard Brook?

It is owned by the State Highway Agency.