US Bridges

ST 31 River ST over Water N Nashua River

Good

Worcester County, Massachusetts · 100 Ft E of Wallace ST · Structure no. F040081KTDOTNBI

Built
1947
78 years old, rebuilt 2014
Condition
Good
inspected September 2023
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
96 ft
2 main spans
Daily traffic
9,104
2019 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 1947 and reconstructed in 2014, so it is 78 years old, older than the Massachusetts average of 63.8 years.

The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 9,104 vehicles a day, roughly 3% of them trucks, projected to reach 23,690 by 2031. The structure is 96 ft (29.3 m) long and 55 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

CarriesST 31 River ST
CrossesWater N Nashua River
Location100 Ft E of Wallace ST
RouteState Highway 31
Coordinates42.58358, -71.81833
Functional classUrban Other Principal Arterial

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionSeptember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; action required to protect exposed foundations
Structural evaluation7: Better than present minimum criteria
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating50 US tons
Inventory rating39.2 US tons

Structure

MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans2
Design loadHL 93
Structure length96 ft (29.3 m)
Longest span45 ft (13.7 m)
Deck width55 ft (16.8 m)
Roadway width36 ft (11 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic9,104 (2019)
Projected traffic23,690 by 2031
Trucks3%
Lanes on structure2
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 proposedWidening of existing bridge without deck rehabilitation
Estimated improvement cost$1.7 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 1947, making it 78 years old in 2025. It was reconstructed in 2014.

What condition is ST 31 River ST over Water N Nashua River in?

The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in September 2023.

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

About 9,104 vehicles per day (2019 count), of which roughly 3% are trucks.

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

The structure is 96 ft (29.3 m) long with a longest span of 45 ft (13.7 m) and a deck 55 ft wide.

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

It is owned by the State Highway Agency.