US Bridges

Route 8 over RTE 42 & Naugatuck River

Fair

New Haven County, Connecticut · RTE 8 near Exit 23 · Structure no. 04383

Built
1981
44 years old
Condition
Fair
inspected May 2023
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
437 ft
3 main spans
Daily traffic
47,700
2021 count
Owner
State
State Highway Agency

About this bridge

Route 8 over RTE 42 & Naugatuck River is a steel continuous stringer/multi-beam or girder carrying Route 8 over RTE 42 & Naugatuck River in New Haven County, Connecticut. It was built in 1981, so it is 44 years old, younger 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 47,700 vehicles a day, roughly 8% of them trucks, projected to reach 70,877 by 2041. The structure is 437 ft (133.2 m) long and 103 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

CarriesRoute 8
CrossesRTE 42 & Naugatuck River
LocationRTE 8 near Exit 23
RouteState Highway 8
Coordinates41.43014, -73.06687
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
Deck6 SatisfactoryStructural elements show some minor deterioration.
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 inspectionMay 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 adequacy9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating44.3 US tons
Inventory rating34.3 US tons

Structure

MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length437 ft (133.2 m)
Longest span156 ft (47.5 m)
Deck width103 ft (31.4 m)
Roadway width97 ft (29.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic47,700 (2021)
Projected traffic70,877 by 2041
Trucks8%
Lanes on structure4
Traffic directionTwo-way traffic
CarriesHighway
CrossesHighway and waterway
Detour if closed1.2 mi (2 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 8 over RTE 42 & Naugatuck River built?

It was built in 1981, making it 44 years old in 2025.

What condition is Route 8 over RTE 42 & Naugatuck 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 May 2023.

How much traffic does Route 8 over RTE 42 & Naugatuck River carry?

About 47,700 vehicles per day (2021 count), of which roughly 8% are trucks.

How long is Route 8 over RTE 42 & Naugatuck River?

The structure is 437 ft (133.2 m) long with a longest span of 156 ft (47.5 m) and a deck 103 ft wide.

Who owns Route 8 over RTE 42 & Naugatuck River?

It is owned by the State Highway Agency.