US Bridges

I-84 Westbound over Mad River

Good

New Haven County, Connecticut · 1600+/- East of Route 69 · Structure no. 01224B

Built
2018
7 years old
Condition
Good
inspected September 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
163 ft
1 main span
Daily traffic
48,700
2021 count
Owner
State
State Highway Agency

About this bridge

I-84 Westbound over Mad River is a steel stringer/multi-beam or girder carrying I-84 Westbound over Mad River in New Haven County, Connecticut. It was built in 2018, so it is 7 years old, younger than the Connecticut average of 56.7 years.

The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 48,700 vehicles a day, roughly 9% of them trucks, projected to reach 72,363 by 2041. The structure is 163 ft (49.7 m) long and 74 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

CarriesI-84 Westbound
CrossesMad River
Location1600+/- East of Route 69
RouteInterstate 84
Coordinates41.54024, -73.01799
Functional classUrban Principal Arterial - Interstate

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionSeptember 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation7: Better than present minimum criteria
Deck geometry7: Better than present minimum criteria
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating68.2 US tons
Inventory rating52.5 US tons

Structure

MaterialSteel
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20
Structure length163 ft (49.7 m)
Longest span153 ft (46.5 m)
Deck width74 ft (22.7 m)
Roadway width71 ft (21.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic48,700 (2021)
Projected traffic72,363 by 2041
Trucks9%
Lanes on structure4
Traffic directionOne-way traffic
CarriesHighway
CrossesWaterway
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 proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was I-84 Westbound over Mad River built?

It was built in 2018, making it 7 years old in 2025.

What condition is I-84 Westbound over Mad River in?

The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in September 2024.

How much traffic does I-84 Westbound over Mad River carry?

About 48,700 vehicles per day (2021 count), of which roughly 9% are trucks.

How long is I-84 Westbound over Mad River?

The structure is 163 ft (49.7 m) long with a longest span of 153 ft (46.5 m) and a deck 74 ft wide.

Who owns I-84 Westbound over Mad River?

It is owned by the State Highway Agency.