US Bridges

I 91 NB over HWY River ST

Fair

Franklin County, Massachusetts · Mm 49.7 on I-91 NB · Structure no. B100210WVDOTNBI

Built
1960
65 years old, rebuilt 1977
Condition
Fair
inspected February 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
161 ft
3 main spans
Daily traffic
9,515
2018 count
Owner
State
State Highway Agency

About this bridge

I 91 NB over HWY River ST is a steel stringer/multi-beam or girder carrying I 91 NB over HWY River ST in Franklin County, Massachusetts. It was built in 1960 and reconstructed in 1977, so it is 65 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 9,515 vehicles a day, roughly 8% of them trucks, projected to reach 14,135 by 2033. The structure is 161 ft (49.2 m) long and 45 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

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CarriesI 91 NB
CrossesHWY River ST
LocationMm 49.7 on I-91 NB
RouteInterstate 91
CountyFranklin County
StateMassachusetts
Coordinates42.66118, -72.54598
Functional classRural Principal Arterial - Interstate

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.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionFebruary 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation4: Meets minimum tolerable limits to be left in place as is
Deck geometry9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating36.4 US tons
Inventory rating21.7 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20 + Mod
Structure length161 ft (49.2 m)
Longest span65 ft (19.9 m)
Deck width45 ft (13.8 m)
Roadway width42 ft (12.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic9,515 (2018)
Projected traffic14,135 by 2033
Trucks8%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway
CrossesHighway
Detour if closed1.2 mi (2 km)
TollOn a free road
National Highway SystemYes
Strategic Highway NetworkInterstate STRAHNET route

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedRehabilitation because of general structure deterioration or inadequate strength
Estimated improvement cost$6.7 million (2025 estimate)
NavigationNot applicable (no waterway)

Frequently asked questions

When was I 91 NB over HWY River ST built?

It was built in 1960, making it 65 years old in 2025. It was reconstructed in 1977.

What condition is I 91 NB over HWY River ST 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 2024.

How much traffic does I 91 NB over HWY River ST carry?

About 9,515 vehicles per day (2018 count), of which roughly 8% are trucks.

How long is I 91 NB over HWY River ST?

The structure is 161 ft (49.2 m) long with a longest span of 65 ft (19.9 m) and a deck 45 ft wide.

Who owns I 91 NB over HWY River ST?

It is owned by the State Highway Agency.