US Bridges

East Flat Hill RD over Transylvania Brook

Good

New Haven County, Connecticut · .5 MI West of Route 172 · Structure no. 05031

Built
2019
6 years old
Condition
Good
inspected July 2024
Type
Slab
Prestressed Concrete
Length
50 ft
1 main span
Daily traffic
642
2024 count
Owner
Town / Township
Town or Township Highway Agency

About this bridge

East Flat Hill RD over Transylvania Brook is a prestressed concrete slab carrying East Flat Hill RD over Transylvania Brook in New Haven County, Connecticut. It was built in 2019, so it is 6 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 642 vehicles a day, roughly 7% of them trucks, projected to reach 954 by 2044. The structure is 50 ft (15.1 m) long and 31 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

CarriesEast Flat Hill RD
CrossesTransylvania Brook
Location.5 MI West of Route 172
RouteCity Street 0
Coordinates41.47236, -73.25747
Functional classRural Local

Condition and inspection

Good

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

ComponentRatingMeaning
Deck8 Very GoodNo problems noted.
Superstructure7 GoodSome minor problems.
Substructure8 Very GoodNo problems noted.
Channel and channel protection7 GoodSome minor problems.
Last inspectionJuly 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than 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 alignment8: Equal to present desirable criteria
Operating rating71.4 US tons
Inventory rating55 US tons

Structure

Structure typeSlab
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans1
Design loadHL 93
Structure length50 ft (15.1 m)
Longest span46 ft (13.9 m)
Deck width31 ft (9.3 m)
Roadway width26 ft (7.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic642 (2024)
Projected traffic954 by 2044
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 proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$1.5 million
NavigationNo navigation control on waterway

Frequently asked questions

When was East Flat Hill RD over Transylvania Brook built?

It was built in 2019, making it 6 years old in 2025.

What condition is East Flat Hill RD over Transylvania Brook 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 July 2024.

How much traffic does East Flat Hill RD over Transylvania Brook carry?

About 642 vehicles per day (2024 count), of which roughly 7% are trucks.

How long is East Flat Hill RD over Transylvania Brook?

The structure is 50 ft (15.1 m) long with a longest span of 46 ft (13.9 m) and a deck 31 ft wide.

Who owns East Flat Hill RD over Transylvania Brook?

It is owned by the Town or Township Highway Agency.