US Bridges

RTE I495 over Carmans River

Fair

Suffolk County, New York · 4.4 MI E Rts 112+495 · Structure no. 000000001064172

Built
1970
55 years old
Condition
Fair
inspected November 2023
Type
Stringer/Multi-beam or Girder
Steel
Length
81 ft
1 main span
Daily traffic
44,177
2021 count
Owner
State
State Highway Agency

About this bridge

RTE I495 over Carmans River is a steel stringer/multi-beam or girder carrying RTE I495 over Carmans River 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 44,177 vehicles a day, roughly 6% of them trucks, projected to reach 46,385 by 2041. The structure is 81 ft (24.7 m) long and 58 ft wide. If it were closed, the detour would be 0.6 mi (1 km).

Location

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CarriesRTE I495
CrossesCarmans River
Location4.4 MI E Rts 112+495
RouteInterstate 495
CountySuffolk County
StateNew York
Coordinates40.83358, -72.91156
Functional classUrban Principal Arterial - Interstate

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.
Channel and channel protection7 GoodSome minor problems.
Last inspectionNovember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry2: Basically intolerable, requiring high priority of replacement
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating46.4 US tons
Inventory rating35.7 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20
Structure length81 ft (24.7 m)
Longest span77 ft (23.4 m)
Deck width58 ft (17.6 m)
Roadway width53 ft (16.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic44,177 (2021)
Projected traffic46,385 by 2041
Trucks6%
Lanes on structure4
Traffic directionOne-way traffic
CarriesHighway
CrossesWaterway
Detour if closed0.6 mi (1 km)
TollOn a free road
National Highway SystemYes
Strategic Highway NetworkInterstate STRAHNET route

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$5 million (2024 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was RTE I495 over Carmans River built?

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

What condition is RTE I495 over Carmans River 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 November 2023.

How much traffic does RTE I495 over Carmans River carry?

About 44,177 vehicles per day (2021 count), of which roughly 6% are trucks.

How long is RTE I495 over Carmans River?

The structure is 81 ft (24.7 m) long with a longest span of 77 ft (23.4 m) and a deck 58 ft wide.

Who owns RTE I495 over Carmans River?

It is owned by the State Highway Agency.