US Bridges

ST 31 River ST over Water N Nashua River

Fair

Worcester County, Massachusetts · East of Broad Street · Structure no. F040101KRDOTNBI

Built
1900
125 years old, rebuilt 1952
Condition
Fair
inspected August 2024
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
91 ft
2 main spans
Daily traffic
9,756
2023 count
Owner
State
State Highway Agency

About this bridge

ST 31 River ST over Water N Nashua River is a steel continuous stringer/multi-beam or girder carrying ST 31 River ST over Water N Nashua River in Worcester County, Massachusetts. It was built in 1900 and reconstructed in 1952, so it is 125 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. Its operating status is: open, would be posted or closed except for temporary shoring.

It carries about 9,756 vehicles a day, roughly 2% of them trucks, projected to reach 23,690 by 2031. The structure is 91 ft (27.7 m) long and 50 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

CarriesST 31 River ST
CrossesWater N Nashua River
LocationEast of Broad Street
RouteState Highway 31
Coordinates42.58692, -71.80897
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
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
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 2024
Inspection intervalevery 24 months
Operating statusOpen, would be posted or closed except for temporary shoring
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 adequacy8: Equal to present desirable criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating42 US tons
Inventory rating25.1 US tons

Structure

MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans2
Design loadH 20
Structure length91 ft (27.7 m)
Longest span44 ft (13.4 m)
Deck width50 ft (15.2 m)
Roadway width11 ft (3.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic9,756 (2023)
Projected traffic23,690 by 2031
Trucks2%
Lanes on structure2
Traffic directionOne-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 statusNot eligible for the National Register of Historic Places
Work proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$11.9 million (2025 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was ST 31 River ST over Water N Nashua River built?

It was built in 1900, making it 125 years old in 2025. It was reconstructed in 1952.

What condition is ST 31 River ST over Water N Nashua 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 August 2024.

How much traffic does ST 31 River ST over Water N Nashua River carry?

About 9,756 vehicles per day (2023 count), of which roughly 2% are trucks.

How long is ST 31 River ST over Water N Nashua River?

The structure is 91 ft (27.7 m) long with a longest span of 44 ft (13.4 m) and a deck 50 ft wide.

Who owns ST 31 River ST over Water N Nashua River?

It is owned by the State Highway Agency.