US Bridges

Route 9 Northbound over Mattabesset River

Fair

Middlesex County, Connecticut · 0.1 MI So. of Cromwell Tl · Structure no. 00640

Built
1960
65 years old, rebuilt 2001
Condition
Fair
inspected September 2023
Type
Stringer/Multi-beam or Girder
Steel
Length
183 ft
2 main spans
Daily traffic
33,100
2022 count
Owner
State
State Highway Agency

About this bridge

Route 9 Northbound over Mattabesset River is a steel stringer/multi-beam or girder carrying Route 9 Northbound over Mattabesset River in Middlesex County, Connecticut. It was built in 1960 and reconstructed in 2001, so it is 65 years old, older than the Connecticut average of 56.7 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 33,100 vehicles a day, roughly 6% of them trucks, projected to reach 49,183 by 2042. The structure is 183 ft (55.9 m) long and 57 ft wide. If it were closed, the detour would be 6.8 mi (11 km).

CarriesRoute 9 Northbound
CrossesMattabesset River
Location0.1 MI So. of Cromwell Tl
RouteState Highway 9
Coordinates41.57301, -72.65196
Functional classUrban Principal Arterial - Other Freeway or Expressway

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.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionSeptember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry9: Superior to present desirable criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating44.6 US tons
Inventory rating34.3 US tons

Structure

MaterialSteel
DeckConcrete, cast-in-place
Main spans2
Design loadHS 20
Structure length183 ft (55.9 m)
Longest span90 ft (27.4 m)
Deck width57 ft (17.5 m)
Roadway width54 ft (16.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic33,100 (2022)
Projected traffic49,183 by 2042
Trucks6%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway
CrossesWaterway
Detour if closed6.8 mi (11 km)
TollOn a free road
National Highway SystemYes

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was Route 9 Northbound over Mattabesset River built?

It was built in 1960, making it 65 years old in 2025. It was reconstructed in 2001.

What condition is Route 9 Northbound over Mattabesset 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 September 2023.

How much traffic does Route 9 Northbound over Mattabesset River carry?

About 33,100 vehicles per day (2022 count), of which roughly 6% are trucks.

How long is Route 9 Northbound over Mattabesset River?

The structure is 183 ft (55.9 m) long with a longest span of 90 ft (27.4 m) and a deck 57 ft wide.

Who owns Route 9 Northbound over Mattabesset River?

It is owned by the State Highway Agency.