US Bridges

Interstate 84 WB over RTE 8 Naug Riv M-N RR

Poor

New Haven County, Connecticut · Waterbury Lower Level · Structure no. 03191B

Built
1967
58 years old, rebuilt 1991
Condition
Poor
inspected September 2022
Type
Girder and Floorbeam System
Steel Continuous
Length
2,461 ft
5 main spans
Daily traffic
33,600
2021 count
Owner
State
State Highway Agency

About this bridge

Interstate 84 WB over RTE 8 Naug Riv M-N RR is a steel continuous girder and floorbeam system carrying Interstate 84 WB over RTE 8 Naug Riv M-N RR in New Haven County, Connecticut. It was built in 1967 and reconstructed in 1991, so it is 58 years old, older than the Connecticut average of 56.7 years.

The most recent inspection reported to the Federal Highway Administration rates it in poor condition with a lowest component rating of 4 out of 9. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.

It carries about 33,600 vehicles a day, roughly 9% of them trucks, projected to reach 49,926 by 2041. The structure is 2,461 ft (750.1 m) long and 48 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

CarriesInterstate 84 WB
CrossesRTE 8 Naug Riv M-N RR
LocationWaterbury Lower Level
RouteInterstate 84
Coordinates41.55173, -73.04922
Functional classUrban Principal Arterial - Interstate

Condition and inspection

Poor

The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.

ComponentRatingMeaning
Deck4 PoorAdvanced section loss, deterioration, spalling or scour.
Superstructure4 PoorAdvanced section loss, deterioration, spalling or scour.
Substructure4 PoorAdvanced section loss, deterioration, spalling or scour.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionSeptember 2022
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation4: Meets minimum tolerable limits to be left in place as is
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating61.9 US tons
Inventory rating37 US tons

Structure

MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans5 (+25 approach)
Design loadHS 20
Structure length2,461 ft (750.1 m)
Longest span156 ft (47.5 m)
Deck width48 ft (14.5 m)
Roadway width42 ft (12.8 m)
Vertical clearance over deck17 ft (5 m)

Traffic and service

Average daily traffic33,600 (2021)
Projected traffic49,926 by 2041
Trucks9%
Lanes on structure3
Traffic directionOne-way traffic
CarriesOverpass structure at an interchange
CrossesHighway, waterway and railroad
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$31.5 million
NavigationNo navigation control on waterway

Frequently asked questions

When was Interstate 84 WB over RTE 8 Naug Riv M-N RR built?

It was built in 1967, making it 58 years old in 2025. It was reconstructed in 1991.

What condition is Interstate 84 WB over RTE 8 Naug Riv M-N RR in?

The National Bridge Inventory rates it in poor condition. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. The last reported inspection was in September 2022.

How much traffic does Interstate 84 WB over RTE 8 Naug Riv M-N RR carry?

About 33,600 vehicles per day (2021 count), of which roughly 9% are trucks.

How long is Interstate 84 WB over RTE 8 Naug Riv M-N RR?

The structure is 2,461 ft (750.1 m) long with a longest span of 156 ft (47.5 m) and a deck 48 ft wide.

Who owns Interstate 84 WB over RTE 8 Naug Riv M-N RR?

It is owned by the State Highway Agency.