US Bridges

Oneill Road over Eight Mile Brook

Fair

New Haven County, Connecticut · 0.2 MI West of Route 188 · Structure no. 04915

Built
1956
69 years old
Condition
Fair
inspected June 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
68 ft
1 main span
Daily traffic
490
2020 count
Owner
Town / Township
Town or Township Highway Agency

About this bridge

Oneill Road over Eight Mile Brook is a steel stringer/multi-beam or girder carrying Oneill Road over Eight Mile Brook in New Haven County, Connecticut. It was built in 1956, so it is 69 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 490 vehicles a day, roughly 7% of them trucks, projected to reach 728 by 2040. The structure is 68 ft (20.7 m) long and 26 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

Open in Google Maps
CarriesOneill Road
CrossesEight Mile Brook
Location0.2 MI West of Route 188
RouteCity Street 0
CountyNew Haven County
StateConnecticut
Coordinates41.42934, -73.16056
Functional classRural Local

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.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure7 GoodSome minor problems.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionJune 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment3: Basically intolerable, requiring high priority of corrective action
Operating rating98.7 US tons
Inventory rating59.2 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20
Structure length68 ft (20.7 m)
Longest span63 ft (19.2 m)
Deck width26 ft (7.8 m)
Roadway width22 ft (6.7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic490 (2020)
Projected traffic728 by 2040
Trucks7%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.9 mi (3 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerTown or Township Highway Agency
Maintained byTown or Township 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 Oneill Road over Eight Mile Brook built?

It was built in 1956, making it 69 years old in 2025.

What condition is Oneill Road over Eight Mile 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 June 2024.

How much traffic does Oneill Road over Eight Mile Brook carry?

About 490 vehicles per day (2020 count), of which roughly 7% are trucks.

How long is Oneill Road over Eight Mile Brook?

The structure is 68 ft (20.7 m) long with a longest span of 63 ft (19.2 m) and a deck 26 ft wide.

Who owns Oneill Road over Eight Mile Brook?

It is owned by the Town or Township Highway Agency.