US Bridges

I 91 over HWY West Loop

Fair

Hampden County, Massachusetts · Mm 9.4 on I-91 · Structure no. W2104610XDOTNBI

Built
1966
59 years old
Condition
Fair
inspected April 2023
Type
Stringer/Multi-beam or Girder
Steel
Length
71 ft
1 main span
Daily traffic
73,585
2017 count
Owner
State
State Highway Agency

About this bridge

I 91 over HWY West Loop is a steel stringer/multi-beam or girder carrying I 91 over HWY West Loop in Hampden County, Massachusetts. It was built in 1966, so it is 59 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 73,585 vehicles a day, roughly 9% of them trucks, projected to reach 122,396 by 2031. The structure is 71 ft (21.6 m) long and 127 ft wide.

Location

Open in Google Maps
CarriesI 91
CrossesHWY West Loop
LocationMm 9.4 on I-91
RouteInterstate 91
CountyHampden County
StateMassachusetts
Coordinates42.13656, -72.62998
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
Deck6 SatisfactoryStructural elements show some minor deterioration.
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 inspectionApril 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating57.8 US tons
Inventory rating29.8 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20 + Mod
Structure length71 ft (21.6 m)
Longest span66 ft (20 m)
Deck width127 ft (38.6 m)
Roadway width98 ft (30 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic73,585 (2017)
Projected traffic122,396 by 2031
Trucks9%
Lanes on structure6
Traffic directionTwo-way traffic
CarriesHighway
CrossesHighway
Detour if closed—
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$8.3 million (2025 estimate)
NavigationNot applicable (no waterway)

Frequently asked questions

When was I 91 over HWY West Loop built?

It was built in 1966, making it 59 years old in 2025.

What condition is I 91 over HWY West Loop 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 April 2023.

How much traffic does I 91 over HWY West Loop carry?

About 73,585 vehicles per day (2017 count), of which roughly 9% are trucks.

How long is I 91 over HWY West Loop?

The structure is 71 ft (21.6 m) long with a longest span of 66 ft (20 m) and a deck 127 ft wide.

Who owns I 91 over HWY West Loop?

It is owned by the State Highway Agency.