US Bridges

I-84 TR 811 over I-84 TR 812 & Naugatuck

Fair

New Haven County, Connecticut · NB RTE 8 to EB 84 Exit 31 · Structure no. 03190C

Built
1966
59 years old
Condition
Fair
inspected November 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
877 ft
9 main spans
Daily traffic
11,000
2018 count
Owner
State
State Highway Agency

About this bridge

I-84 TR 811 over I-84 TR 812 & Naugatuck is a steel stringer/multi-beam or girder carrying I-84 TR 811 over I-84 TR 812 & Naugatuck in New Haven County, Connecticut. It was built in 1966, so it is 59 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 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 11,000 vehicles a day, roughly 9% of them trucks, projected to reach 16,345 by 2038. The structure is 877 ft (267.3 m) long and 28 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

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CarriesI-84 TR 811
CrossesI-84 TR 812 & Naugatuck
LocationNB RTE 8 to EB 84 Exit 31
RouteInterstate 84
CountyNew Haven County
StateConnecticut
Coordinates41.55, -73.04833
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
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
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 inspectionNovember 2024
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 geometry7: Better than present minimum criteria
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment3: Basically intolerable, requiring high priority of corrective action
Operating rating60.4 US tons
Inventory rating46.7 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans9
Design loadHL 93
Structure length877 ft (267.3 m)
Longest span118 ft (36 m)
Deck width28 ft (8.4 m)
Roadway width24 ft (7.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic11,000 (2018)
Projected traffic16,345 by 2038
Trucks9%
Lanes on structure1
Traffic directionOne-way traffic
CarriesThird level (interchange)
CrossesHighway and waterway
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$11.1 million
NavigationNo navigation control on waterway

Frequently asked questions

When was I-84 TR 811 over I-84 TR 812 & Naugatuck built?

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

What condition is I-84 TR 811 over I-84 TR 812 & Naugatuck 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 November 2024.

How much traffic does I-84 TR 811 over I-84 TR 812 & Naugatuck carry?

About 11,000 vehicles per day (2018 count), of which roughly 9% are trucks.

How long is I-84 TR 811 over I-84 TR 812 & Naugatuck?

The structure is 877 ft (267.3 m) long with a longest span of 118 ft (36 m) and a deck 28 ft wide.

Who owns I-84 TR 811 over I-84 TR 812 & Naugatuck?

It is owned by the State Highway Agency.