US Bridges

August Avenue over Carlls River

Fair

Suffolk County, New York · 0.6 MI N of Belmont & Ssp · Structure no. 000000002269120

Built
1940
85 years old
Condition
Fair
inspected April 2023
Type
Culvert
Concrete
Length
43 ft
3 main spans
Daily traffic
15,563
2020 count
Owner
Town / Township
Town or Township Highway Agency

About this bridge

August Avenue over Carlls River is a concrete culvert carrying August Avenue over Carlls River in Suffolk County, New York. It was built in 1940, so it is 85 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 15,563 vehicles a day, roughly 3% of them trucks, projected to reach 19,256 by 2041. The structure is 43 ft (13.1 m) long and 53 ft wide.

CarriesAugust Avenue
CrossesCarlls River
Location0.6 MI N of Belmont & Ssp
RouteCity Street 0
Coordinates40.74106, -73.34415
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
Channel and channel protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Culvert6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionApril 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry9: Superior to present desirable criteria
Waterway adequacy4: Meets minimum tolerable limits to be left in place as is
Approach roadway alignment6: Equal to present minimum criteria
Operating rating79.1 US tons
Inventory rating36 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckNot applicable
Main spans3
Design loadUnknown
Structure length43 ft (13.1 m)
Longest span13 ft (3.9 m)
Deck width53 ft (16.1 m)
Roadway width47 ft (14.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic15,563 (2020)
Projected traffic19,256 by 2041
Trucks3%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed—
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerTown or Township Highway Agency
Maintained byTown or Township Highway Agency
Historic statusHistorical significance not determinable at this time
Work proposedWidening with deck rehabilitation or replacement
Estimated improvement cost$1.2 million (2024 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was August Avenue over Carlls River built?

It was built in 1940, making it 85 years old in 2025.

What condition is August Avenue over Carlls 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 2023.

How much traffic does August Avenue over Carlls River carry?

About 15,563 vehicles per day (2020 count), of which roughly 3% are trucks.

How long is August Avenue over Carlls River?

The structure is 43 ft (13.1 m) long with a longest span of 13 ft (3.9 m) and a deck 53 ft wide.

Who owns August Avenue over Carlls River?

It is owned by the Town or Township Highway Agency.