US Bridges

Grand Ave over Long Creek

Fair

Suffolk County, New York · 0.5 MI N of Mattituck · Structure no. 000000003300440

Built
1972
53 years old
Condition
Fair
inspected April 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
64 ft
1 main span
Daily traffic
2,202
2020 count
Owner
County
County Highway Agency

About this bridge

Grand Ave over Long Creek is a steel stringer/multi-beam or girder carrying Grand Ave over Long Creek in Suffolk County, New York. It was built in 1972, so it is 53 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.

It carries about 2,202 vehicles a day, roughly 7% of them trucks, projected to reach 2,724 by 2041. The structure is 64 ft (19.5 m) long and 36 ft wide. If it were closed, the detour would be 0.6 mi (1 km).

Location

Open in Google Maps
CarriesGrand Ave
CrossesLong Creek
Location0.5 MI N of Mattituck
CountySuffolk County
StateNew York
Coordinates40.99904, -72.53826
Functional classUrban Collector

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.
Superstructure7 GoodSome minor problems.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionApril 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourScour critical; foundations unstable for calculated scour conditions
Structural evaluation6: Equal to present minimum criteria
Deck geometry3: Basically intolerable, requiring high priority of corrective action
Waterway adequacy5: Somewhat better than minimum adequacy to tolerate being left in place as is
Approach roadway alignment8: Equal to present desirable criteria
Operating rating94 US tons
Inventory rating56 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20
Structure length64 ft (19.5 m)
Longest span60 ft (18.2 m)
Deck width36 ft (11 m)
Roadway width26 ft (7.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic2,202 (2020)
Projected traffic2,724 by 2041
Trucks7%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed0.6 mi (1 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$4.4 million (2024 estimate)
NavigationNavigation control on waterway (bridge permit required)

Frequently asked questions

When was Grand Ave over Long Creek built?

It was built in 1972, making it 53 years old in 2025.

What condition is Grand Ave over Long 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 Grand Ave over Long Creek carry?

About 2,202 vehicles per day (2020 count), of which roughly 7% are trucks.

How long is Grand Ave over Long Creek?

The structure is 64 ft (19.5 m) long with a longest span of 60 ft (18.2 m) and a deck 36 ft wide.

Who owns Grand Ave over Long Creek?

It is owned by the County Highway Agency.