US Bridges

Belmont Avenue over RTE 908M

Fair

Suffolk County, New York · 1.3 MI W JCT Rts 231+SSP · Structure no. 000000001057790

Built
1960
65 years old
Condition
Fair
inspected March 2024
Type
Arch - Deck
Concrete
Length
78 ft
1 main span
Daily traffic
22,776
2020 count
Owner
State
State Highway Agency

About this bridge

Belmont Avenue over RTE 908M is a concrete arch - deck carrying Belmont Avenue over RTE 908M in Suffolk County, New York. It was built in 1960, so it is 65 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 22,776 vehicles a day, roughly 4% of them trucks, projected to reach 27,668 by 2041. The structure is 78 ft (23.7 m) long and 61 ft wide. If it were closed, the detour would be 2.5 mi (4 km).

Location

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CarriesBelmont Avenue
CrossesRTE 908M
Location1.3 MI W JCT Rts 231+SSP
CountySuffolk County
StateNew York
Coordinates40.73235, -73.34603
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
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure7 GoodSome minor problems.
Last inspectionMarch 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation6: Equal to present minimum criteria
Deck geometry2: Basically intolerable, requiring high priority of replacement
Approach roadway alignment7: Better than present minimum criteria
Operating rating68 US tons
Inventory rating40 US tons

Structure

Structure typeArch - Deck
MaterialConcrete
DeckNot applicable
Main spans1
Design loadHS 20
Structure length78 ft (23.7 m)
Longest span72 ft (21.9 m)
Deck width61 ft (18.6 m)
Roadway width48 ft (14.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic22,776 (2020)
Projected traffic27,668 by 2041
Trucks4%
Lanes on structure4
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesHighway
Detour if closed2.5 mi (4 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedWidening with deck rehabilitation or replacement
Estimated improvement cost$6.3 million (2024 estimate)
NavigationNot applicable (no waterway)

Frequently asked questions

When was Belmont Avenue over RTE 908M built?

It was built in 1960, making it 65 years old in 2025.

What condition is Belmont Avenue over RTE 908M 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 March 2024.

How much traffic does Belmont Avenue over RTE 908M carry?

About 22,776 vehicles per day (2020 count), of which roughly 4% are trucks.

How long is Belmont Avenue over RTE 908M?

The structure is 78 ft (23.7 m) long with a longest span of 72 ft (21.9 m) and a deck 61 ft wide.

Who owns Belmont Avenue over RTE 908M?

It is owned by the State Highway Agency.