US Bridges

Route 15 Ramp 148 over Willow Brook

Fair

New Haven County, Connecticut · .2 Miles N. of E. Main ST · Structure no. 01823

Built
1964
61 years old
Condition
Fair
inspected July 2024
Type
Culvert
Concrete Continuous
Length
31 ft
2 main spans
Daily traffic
5,600
2022 count
Owner
State
State Highway Agency

About this bridge

Route 15 Ramp 148 over Willow Brook is a concrete continuous culvert carrying Route 15 Ramp 148 over Willow Brook in New Haven County, Connecticut. It was built in 1964, so it is 61 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 5,600 vehicles a day, roughly 6% of them trucks, projected to reach 8,321 by 2042. The structure is 31 ft (9.4 m) long.

Location

Open in Google Maps
CarriesRoute 15 Ramp 148
CrossesWillow Brook
Location.2 Miles N. of E. Main ST
RouteState Highway 15
CountyNew Haven County
StateConnecticut
Coordinates41.52909, -72.77036
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
Channel and channel protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Culvert6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionJuly 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating79.3 US tons
Inventory rating61.1 US tons

Structure

Structure typeCulvert
MaterialConcrete Continuous
DeckOther
Main spans2
Design loadHS 20
Structure length31 ft (9.4 m)
Longest span14 ft (4.3 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic5,600 (2022)
Projected traffic8,321 by 2042
Trucks6%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway
CrossesWaterway
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—
NavigationNo navigation control on waterway

Frequently asked questions

When was Route 15 Ramp 148 over Willow Brook built?

It was built in 1964, making it 61 years old in 2025.

What condition is Route 15 Ramp 148 over Willow Brook 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 July 2024.

How much traffic does Route 15 Ramp 148 over Willow Brook carry?

About 5,600 vehicles per day (2022 count), of which roughly 6% are trucks.

How long is Route 15 Ramp 148 over Willow Brook?

The structure is 31 ft (9.4 m) long with a longest span of 14 ft (4.3 m).

Who owns Route 15 Ramp 148 over Willow Brook?

It is owned by the State Highway Agency.