US Bridges

RTE 908T over Seamans Island Ck

Fair

Nassau County, New York · 4.1 MI S JCT Rts Ssp &wsp · Structure no. 000000001058519

Built
1996
29 years old
Condition
Fair
inspected February 2024
Type
Box Beam or Girders - Multiple
Prestressed Concrete
Length
119 ft
1 main span
Daily traffic
15,230
2020 count
Owner
State
State Highway Agency

About this bridge

RTE 908T over Seamans Island Ck is a prestressed concrete box beam or girders - multiple carrying RTE 908T over Seamans Island Ck in Nassau County, New York. It was built in 1996, so it is 29 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 15,230 vehicles a day, roughly 1% of them trucks, projected to reach 18,116 by 2041. The structure is 119 ft (36.3 m) long and 92 ft wide. If it were closed, the detour would be 9.9 mi (16 km).

CarriesRTE 908T
CrossesSeamans Island Ck
Location4.1 MI S JCT Rts Ssp &wsp
RouteState Highway 908T
Coordinates40.64009, -73.50721
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
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionFebruary 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 adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating99 US tons
Inventory rating45 US tons

Structure

MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans1
Design loadHS 25 or greater
Structure length119 ft (36.3 m)
Longest span115 ft (35.1 m)
Deck width92 ft (27.9 m)
Roadway width78 ft (23.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic15,230 (2020)
Projected traffic18,116 by 2041
Trucks1%
Lanes on structure5
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed9.9 mi (16 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$7.7 million (2024 estimate)
NavigationNavigation control on waterway (bridge permit required)

Frequently asked questions

When was RTE 908T over Seamans Island Ck built?

It was built in 1996, making it 29 years old in 2025.

What condition is RTE 908T over Seamans Island Ck 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 February 2024.

How much traffic does RTE 908T over Seamans Island Ck carry?

About 15,230 vehicles per day (2020 count), of which roughly 1% are trucks.

How long is RTE 908T over Seamans Island Ck?

The structure is 119 ft (36.3 m) long with a longest span of 115 ft (35.1 m) and a deck 92 ft wide.

Who owns RTE 908T over Seamans Island Ck?

It is owned by the State Highway Agency.