US Bridges

I 90 WB over ST 21 Center ST

Fair

Hampden County, Massachusetts · Mm 54.3 on I-90 WB · Structure no. L160104JJDOTNBI

Built
1957
68 years old, rebuilt 1995
Condition
Fair
inspected February 2025
Type
Stringer/Multi-beam or Girder
Steel
Length
115 ft
3 main spans
Daily traffic
59,670
2017 count
Owner
State
State Highway Agency

About this bridge

I 90 WB over ST 21 Center ST is a steel stringer/multi-beam or girder carrying I 90 WB over ST 21 Center ST in Hampden County, Massachusetts. It was built in 1957 and reconstructed in 1995, so it is 68 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 59,670 vehicles a day, roughly 12% of them trucks, projected to reach 67,005 by 2032. The structure is 115 ft (35.1 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 90 WB
CrossesST 21 Center ST
LocationMm 54.3 on I-90 WB
RouteInterstate 90
CountyHampden County
StateMassachusetts
Coordinates42.16718, -72.48179
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.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionFebruary 2025
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 geometry7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating62.6 US tons
Inventory rating37.5 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length115 ft (35.1 m)
Longest span55 ft (16.8 m)
Deck width45 ft (13.6 m)
Roadway width41 ft (12.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic59,670 (2017)
Projected traffic67,005 by 2032
Trucks12%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway
CrossesHighway
Detour if closed1.2 mi (2 km)
TollOn a toll 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$4.8 million (2025 estimate)
NavigationNot applicable (no waterway)

Frequently asked questions

When was I 90 WB over ST 21 Center ST built?

It was built in 1957, making it 68 years old in 2025. It was reconstructed in 1995.

What condition is I 90 WB over ST 21 Center 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 2025.

How much traffic does I 90 WB over ST 21 Center ST carry?

About 59,670 vehicles per day (2017 count), of which roughly 12% are trucks.

How long is I 90 WB over ST 21 Center ST?

The structure is 115 ft (35.1 m) long with a longest span of 55 ft (16.8 m) and a deck 45 ft wide.

Who owns I 90 WB over ST 21 Center ST?

It is owned by the State Highway Agency.