US Bridges

RTE 27 over County Route 55 County

Fair

Suffolk County, New York · 14.4 MI E Rts 112+27 · Structure no. 000000001056332

Built
1970
55 years old
Condition
Fair
inspected July 2023
Type
Stringer/Multi-beam or Girder
Steel
Length
114 ft
1 main span
Daily traffic
11,915
2019 count
Owner
State
State Highway Agency

About this bridge

RTE 27 over County Route 55 County is a steel stringer/multi-beam or girder carrying RTE 27 over County Route 55 County in Suffolk County, New York. It was built in 1970, so it is 55 years old, older than the New York average of 53 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 11,915 vehicles a day, roughly 7% of them trucks, projected to reach 14,172 by 2041. The structure is 114 ft (34.7 m) long and 56 ft wide. If it were closed, the detour would be 0.6 mi (1 km).

Location

Open in Google Maps
CarriesRTE 27
CrossesCounty Route 55 County
Location14.4 MI E Rts 112+27
RouteState Highway 27
CountySuffolk County
StateNew York
Coordinates40.83588, -72.74164
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 inspectionJuly 2023
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 alignment7: Better than present minimum criteria
Operating rating72 US tons
Inventory rating36 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20
Structure length114 ft (34.7 m)
Longest span110 ft (33.5 m)
Deck width56 ft (17.1 m)
Roadway width53 ft (16.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic11,915 (2019)
Projected traffic14,172 by 2041
Trucks7%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway
CrossesHighway
Detour if closed0.6 mi (1 km)
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 proposedWidening with deck rehabilitation or replacement
Estimated improvement cost$6.6 million (2024 estimate)
NavigationNot applicable (no waterway)

Frequently asked questions

When was RTE 27 over County Route 55 County built?

It was built in 1970, making it 55 years old in 2025.

What condition is RTE 27 over County Route 55 County 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 2023.

How much traffic does RTE 27 over County Route 55 County carry?

About 11,915 vehicles per day (2019 count), of which roughly 7% are trucks.

How long is RTE 27 over County Route 55 County?

The structure is 114 ft (34.7 m) long with a longest span of 110 ft (33.5 m) and a deck 56 ft wide.

Who owns RTE 27 over County Route 55 County?

It is owned by the State Highway Agency.