US Bridges

Montauk Hwy-Cr 80 over Carmans River

Fair

Suffolk County, New York · .7 MI W JCT Wfloyd&mtk Hy · Structure no. 000000003056420

Built
1941
84 years old
Condition
Fair
inspected April 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
33 ft
1 main span
Daily traffic
15,881
2021 count
Owner
State
State Highway Agency

About this bridge

Montauk Hwy-Cr 80 over Carmans River is a steel stringer/multi-beam or girder carrying Montauk Hwy-Cr 80 over Carmans River in Suffolk County, New York. It was built in 1941, so it is 84 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 15,881 vehicles a day, roughly 4% of them trucks, projected to reach 19,292 by 2041. The structure is 33 ft (10.1 m) long and 65 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

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CarriesMontauk Hwy-Cr 80
CrossesCarmans River
Location.7 MI W JCT Wfloyd&mtk Hy
CountySuffolk County
StateNew York
Coordinates40.80103, -72.88371
Functional classUrban Minor Arterial

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionApril 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation3: Basically intolerable, requiring high priority of corrective action
Deck geometry9: Superior to present desirable criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating20.4 US tons
Inventory rating15.8 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans1
Design loadOther
Structure length33 ft (10.1 m)
Longest span32 ft (9.7 m)
Deck width65 ft (19.7 m)
Roadway width52 ft (15.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic15,881 (2021)
Projected traffic19,292 by 2041
Trucks4%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed1.9 mi (3 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerState Highway Agency
Maintained byCounty Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedWidening with deck rehabilitation or replacement
Estimated improvement cost$3.3 million (2024 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Montauk Hwy-Cr 80 over Carmans River built?

It was built in 1941, making it 84 years old in 2025.

What condition is Montauk Hwy-Cr 80 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 April 2024.

How much traffic does Montauk Hwy-Cr 80 over Carmans River carry?

About 15,881 vehicles per day (2021 count), of which roughly 4% are trucks.

How long is Montauk Hwy-Cr 80 over Carmans River?

The structure is 33 ft (10.1 m) long with a longest span of 32 ft (9.7 m) and a deck 65 ft wide.

Who owns Montauk Hwy-Cr 80 over Carmans River?

It is owned by the State Highway Agency and maintained by the County Highway Agency.