US Bridges

Ponquogue Av over Shinnecock Bay

FairPosted for load

Suffolk County, New York · South of Ponquogue-Beach · Structure no. 000000003300520

Built
1988
37 years old
Condition
Fair
inspected October 2024
Type
Stringer/Multi-beam or Girder
Prestressed Concrete Continuous
Length
2,791 ft
27 main spans
Daily traffic
5,676
2020 count
Owner
County
County Highway Agency

About this bridge

Ponquogue Av over Shinnecock Bay is a prestressed concrete continuous stringer/multi-beam or girder carrying Ponquogue Av over Shinnecock Bay in Suffolk County, New York. It was built in 1988, so it is 37 years old, younger 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. Its operating status is: posted for load restriction.

It carries about 5,676 vehicles a day, roughly 3% of them trucks, projected to reach 6,895 by 2041. The structure is 2,791 ft (850.7 m) long and 39 ft wide. If it were closed, the detour would be 13.7 mi (22 km).

Location

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CarriesPonquogue Av
CrossesShinnecock Bay
LocationSouth of Ponquogue-Beach
RouteCounty Highway 0
CountySuffolk County
StateNew York
Coordinates40.84135, -72.4993
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.
Substructure7 GoodSome minor problems.
Channel and channel protection7 GoodSome minor problems.
Last inspectionOctober 2024
Inspection intervalevery 12 months
Operating statusPosted for load restriction
ScourScour critical; foundations unstable for calculated scour conditions
Structural evaluation6: Equal to present minimum criteria
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating54 US tons
Inventory rating36 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete Continuous
DeckConcrete, cast-in-place
Main spans27
Design loadHS 20
Structure length2,791 ft (850.7 m)
Longest span150 ft (45.7 m)
Deck width39 ft (11.8 m)
Roadway width30 ft (9.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic5,676 (2020)
Projected traffic6,895 by 2041
Trucks3%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed13.7 mi (22 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCounty 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$49.6 million (2024 estimate)
NavigationNavigation control on waterway (bridge permit required)

Frequently asked questions

When was Ponquogue Av over Shinnecock Bay built?

It was built in 1988, making it 37 years old in 2025.

What condition is Ponquogue Av over Shinnecock Bay 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 October 2024.

How much traffic does Ponquogue Av over Shinnecock Bay carry?

About 5,676 vehicles per day (2020 count), of which roughly 3% are trucks.

How long is Ponquogue Av over Shinnecock Bay?

The structure is 2,791 ft (850.7 m) long with a longest span of 150 ft (45.7 m) and a deck 39 ft wide.

Who owns Ponquogue Av over Shinnecock Bay?

It is owned by the County Highway Agency.