US Bridges

I 91 over ST116 Main ST (n End)

Fair

Hampden County, Massachusetts · Mm 7.4 on I-91 · Structure no. S2408010RDOTNBI

Built
1967
58 years old
Condition
Fair
inspected January 2025
Type
Stringer/Multi-beam or Girder
Steel
Length
165 ft
1 main span
Daily traffic
129,457
2023 count
Owner
State
State Highway Agency

About this bridge

I 91 over ST116 Main ST (n End) is a steel stringer/multi-beam or girder carrying I 91 over ST116 Main ST (n End) in Hampden County, Massachusetts. It was built in 1967, so it is 58 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 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 129,457 vehicles a day, roughly 6% of them trucks, projected to reach 155,719 by 2032. The structure is 165 ft (50.3 m) long and 171 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

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CarriesI 91
CrossesST116 Main ST (n End)
LocationMm 7.4 on I-91
RouteInterstate 91
CountyHampden County
StateMassachusetts
Coordinates42.12148, -72.60892
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.
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.
Last inspectionJanuary 2025
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation3: Basically intolerable, requiring high priority of corrective action
Deck geometry9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating59.4 US tons
Inventory rating14.9 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20 + Mod
Structure length165 ft (50.3 m)
Longest span156 ft (47.5 m)
Deck width171 ft (52.2 m)
Roadway width157 ft (47.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic129,457 (2023)
Projected traffic155,719 by 2032
Trucks6%
Lanes on structure10
Traffic directionTwo-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$25.9 million (2025 estimate)
NavigationNot applicable (no waterway)

Frequently asked questions

When was I 91 over ST116 Main ST (n End) built?

It was built in 1967, making it 58 years old in 2025.

What condition is I 91 over ST116 Main ST (n End) 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 January 2025.

How much traffic does I 91 over ST116 Main ST (n End) carry?

About 129,457 vehicles per day (2023 count), of which roughly 6% are trucks.

How long is I 91 over ST116 Main ST (n End)?

The structure is 165 ft (50.3 m) long with a longest span of 156 ft (47.5 m) and a deck 171 ft wide.

Who owns I 91 over ST116 Main ST (n End)?

It is owned by the State Highway Agency.