US Bridges

Route 15 over Quinnipiac Street

Fair

New Haven County, Connecticut · 0.7 MI N of No Haven T.L · Structure no. 00791

Built
1947
78 years old, rebuilt 1988
Condition
Fair
inspected December 2022
Type
Stringer/Multi-beam or Girder
Steel
Length
57 ft
1 main span
Daily traffic
63,700
2022 count
Owner
State
State Highway Agency

About this bridge

Route 15 over Quinnipiac Street is a steel stringer/multi-beam or girder carrying Route 15 over Quinnipiac Street in New Haven County, Connecticut. It was built in 1947 and reconstructed in 1988, so it is 78 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 63,700 vehicles a day, roughly 1% of them trucks, projected to reach 94,652 by 2042. The structure is 57 ft (17.4 m) long and 99 ft wide.

CarriesRoute 15
CrossesQuinnipiac Street
Location0.7 MI N of No Haven T.L
RouteState Highway 15
Coordinates41.45865, -72.83658
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.
Superstructure7 GoodSome minor problems.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionDecember 2022
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation6: Equal to present minimum criteria
Deck geometry9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating89.6 US tons
Inventory rating68.9 US tons

Structure

MaterialSteel
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20
Structure length57 ft (17.4 m)
Longest span52 ft (15.9 m)
Deck width99 ft (30.3 m)
Roadway width96 ft (29.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic63,700 (2022)
Projected traffic94,652 by 2042
Trucks1%
Lanes on structure5
Traffic directionTwo-way traffic
CarriesHighway
CrossesHighway
Detour if closed—
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—
NavigationNot applicable (no waterway)

Frequently asked questions

When was Route 15 over Quinnipiac Street built?

It was built in 1947, making it 78 years old in 2025. It was reconstructed in 1988.

What condition is Route 15 over Quinnipiac Street 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 December 2022.

How much traffic does Route 15 over Quinnipiac Street carry?

About 63,700 vehicles per day (2022 count), of which roughly 1% are trucks.

How long is Route 15 over Quinnipiac Street?

The structure is 57 ft (17.4 m) long with a longest span of 52 ft (15.9 m) and a deck 99 ft wide.

Who owns Route 15 over Quinnipiac Street?

It is owned by the State Highway Agency.