US Bridges

RTE 908M over Carlls River Pedestrian

Fair

Suffolk County, New York · Between Exits 37 & 38 - S · Structure no. 000000001059809

Built
1933
92 years old
Condition
Fair
inspected August 2024
Type
Arch - Deck
Concrete
Length
36 ft
1 main span
Daily traffic
139,208
2020 count
Owner
State
State Highway Agency

About this bridge

RTE 908M over Carlls River Pedestrian is a concrete arch - deck carrying RTE 908M over Carlls River Pedestrian in Suffolk County, New York. It was built in 1933, so it is 92 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 139,208 vehicles a day, projected to reach 165,587 by 2041. The structure is 36 ft (11 m) long and 103 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

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CarriesRTE 908M
CrossesCarlls River Pedestrian
LocationBetween Exits 37 & 38 - S
RouteState Highway 908M
CountySuffolk County
StateNew York
Coordinates40.73255, -73.34159
Functional classUrban Principal Arterial - Other Freeway or Expressway

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.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionAugust 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating71.8 US tons
Inventory rating30.6 US tons

Structure

Structure typeArch - Deck
MaterialConcrete
DeckNot applicable
Main spans1
Design loadH 20
Structure length36 ft (11 m)
Longest span32 ft (9.7 m)
Deck width103 ft (31.3 m)
Roadway width92 ft (28 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic139,208 (2020)
Projected traffic165,587 by 2041
Trucks0%
Lanes on structure6
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.9 mi (3 km)
TollOn a free road
National Highway SystemYes

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$3 million (2024 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was RTE 908M over Carlls River Pedestrian built?

It was built in 1933, making it 92 years old in 2025.

What condition is RTE 908M over Carlls River Pedestrian 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 August 2024.

How much traffic does RTE 908M over Carlls River Pedestrian carry?

About 139,208 vehicles per day (2020 count).

How long is RTE 908M over Carlls River Pedestrian?

The structure is 36 ft (11 m) long with a longest span of 32 ft (9.7 m) and a deck 103 ft wide.

Who owns RTE 908M over Carlls River Pedestrian?

It is owned by the State Highway Agency.