US Bridges

Montauk Highway over Quantuck Creek

Fair

Suffolk County, New York · 2 MI East of Westhampton · Structure no. 000000003300610

Built
1941
84 years old
Condition
Fair
inspected April 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
49 ft
1 main span
Daily traffic
9,775
2020 count
Owner
County
County Highway Agency

About this bridge

Montauk Highway over Quantuck Creek is a steel stringer/multi-beam or girder carrying Montauk Highway over Quantuck Creek 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 9,775 vehicles a day, roughly 8% of them trucks, projected to reach 11,874 by 2041. The structure is 49 ft (14.9 m) long and 71 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

Open in Google Maps
CarriesMontauk Highway
CrossesQuantuck Creek
Location2 MI East of Westhampton
RouteCounty Highway 0
CountySuffolk County
StateNew York
Coordinates40.82287, -72.61873
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
Deck7 GoodSome minor problems.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure7 GoodSome minor problems.
Channel and channel protection7 GoodSome minor problems.
Last inspectionApril 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourScour critical; foundations unstable for calculated scour conditions
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry9: Superior to present desirable criteria
Waterway adequacy5: Somewhat better than minimum adequacy to tolerate being left in place as is
Approach roadway alignment8: Equal to present desirable criteria
Operating rating42 US tons
Inventory rating25 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans1
Design loadH 20
Structure length49 ft (14.9 m)
Longest span47 ft (14.3 m)
Deck width71 ft (21.5 m)
Roadway width58 ft (17.7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic9,775 (2020)
Projected traffic11,874 by 2041
Trucks8%
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

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$4 million (2024 estimate)
NavigationNavigation control on waterway (bridge permit required)

Frequently asked questions

When was Montauk Highway over Quantuck Creek built?

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

What condition is Montauk Highway over Quantuck Creek 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 Highway over Quantuck Creek carry?

About 9,775 vehicles per day (2020 count), of which roughly 8% are trucks.

How long is Montauk Highway over Quantuck Creek?

The structure is 49 ft (14.9 m) long with a longest span of 47 ft (14.3 m) and a deck 71 ft wide.

Who owns Montauk Highway over Quantuck Creek?

It is owned by the County Highway Agency.