US Bridges

I 91 SB over ST141 EB

Fair

Hampden County, Massachusetts · Mm 15.1 on I-91 SB · Structure no. H210520YKDOTNBI

Built
1965
60 years old, rebuilt 1986
Condition
Fair
inspected December 2023
Type
Stringer/Multi-beam or Girder
Steel
Length
89 ft
1 main span
Daily traffic
37,512
2023 count
Owner
State
State Highway Agency

About this bridge

I 91 SB over ST141 EB is a steel stringer/multi-beam or girder carrying I 91 SB over ST141 EB in Hampden County, Massachusetts. It was built in 1965 and reconstructed in 1986, so it is 60 years old, younger 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.

It carries about 37,512 vehicles a day, roughly 12% of them trucks, projected to reach 100,759 by 2032. The structure is 89 ft (27.2 m) long and 43 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

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CarriesI 91 SB
CrossesST141 EB
LocationMm 15.1 on I-91 SB
RouteInterstate 91
CountyHampden County
StateMassachusetts
Coordinates42.21142, -72.63383
Functional classUrban 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
Deck7 GoodSome minor problems.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionDecember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation6: Equal to present minimum criteria
Deck geometry7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating82.8 US tons
Inventory rating49.6 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20 + Mod
Structure length89 ft (27.2 m)
Longest span85 ft (26 m)
Deck width43 ft (13.2 m)
Roadway width40 ft (12.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic37,512 (2023)
Projected traffic100,759 by 2032
Trucks12%
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 statusPossibly eligible for the National Register; requires further investigation
Work proposedWidening of existing bridge without deck rehabilitation
Estimated improvement cost$394,000 (2025 estimate)
NavigationNot applicable (no waterway)

Frequently asked questions

When was I 91 SB over ST141 EB built?

It was built in 1965, making it 60 years old in 2025. It was reconstructed in 1986.

What condition is I 91 SB over ST141 EB 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 December 2023.

How much traffic does I 91 SB over ST141 EB carry?

About 37,512 vehicles per day (2023 count), of which roughly 12% are trucks.

How long is I 91 SB over ST141 EB?

The structure is 89 ft (27.2 m) long with a longest span of 85 ft (26 m) and a deck 43 ft wide.

Who owns I 91 SB over ST141 EB?

It is owned by the State Highway Agency.