US Bridges

I 391 over Water Connecticut River

Fair

Hampden County, Massachusetts · Mm 4.5 on I-391 · Structure no. C130390WFDOTNBI

Built
1979
46 years old
Condition
Fair
inspected March 2023
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
944 ft
5 main spans
Daily traffic
36,130
2021 count
Owner
State
State Highway Agency

About this bridge

I 391 over Water Connecticut River is a steel continuous stringer/multi-beam or girder carrying I 391 over Water Connecticut River in Hampden County, Massachusetts. It was built in 1979, so it is 46 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 36,130 vehicles a day, roughly 10% of them trucks, projected to reach 50,380 by 2031. The structure is 944 ft (287.8 m) long and 115 ft wide. If it were closed, the detour would be 8.1 mi (13 km).

CarriesI 391
CrossesWater Connecticut River
LocationMm 4.5 on I-391
RouteInterstate 391
Coordinates42.1899, -72.60983
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.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionMarch 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry9: Superior to present desirable criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment9: Superior to present desirable criteria
Operating rating56.1 US tons
Inventory rating33.6 US tons

Structure

MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans5
Design loadHS 20 + Mod
Structure length944 ft (287.8 m)
Longest span205 ft (62.5 m)
Deck width115 ft (35 m)
Roadway width106 ft (32.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic36,130 (2021)
Projected traffic50,380 by 2031
Trucks10%
Lanes on structure6
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed8.1 mi (13 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$98.2 million (2025 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was I 391 over Water Connecticut River built?

It was built in 1979, making it 46 years old in 2025.

What condition is I 391 over Water Connecticut River 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 March 2023.

How much traffic does I 391 over Water Connecticut River carry?

About 36,130 vehicles per day (2021 count), of which roughly 10% are trucks.

How long is I 391 over Water Connecticut River?

The structure is 944 ft (287.8 m) long with a longest span of 205 ft (62.5 m) and a deck 115 ft wide.

Who owns I 391 over Water Connecticut River?

It is owned by the State Highway Agency.