US Bridges

RTE 908C over Swift Creek

Good

Nassau County, New York · Near East Bay in Nassau · Structure no. 000000001056779

Built
1999
26 years old
Condition
Good
inspected October 2023
Type
Box Beam or Girders - Multiple
Prestressed Concrete Continuous
Length
667 ft
10 main spans
Daily traffic
25,774
2019 count
Owner
State
State Highway Agency

About this bridge

RTE 908C over Swift Creek is a prestressed concrete continuous box beam or girders - multiple carrying RTE 908C over Swift Creek in Nassau County, New York. It was built in 1999, so it is 26 years old, younger than the New York average of 53 years.

The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 25,774 vehicles a day, roughly 1% of them trucks, projected to reach 30,658 by 2041. The structure is 667 ft (203.3 m) long and 76 ft wide. If it were closed, the detour would be 15.5 mi (25 km).

CarriesRTE 908C
CrossesSwift Creek
LocationNear East Bay in Nassau
RouteState Highway 908C
Coordinates40.60929, -73.55221
Functional classUrban Principal Arterial - Other Freeway or Expressway

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionOctober 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating99 US tons
Inventory rating59 US tons

Structure

MaterialPrestressed Concrete Continuous
DeckConcrete, cast-in-place
Main spans10
Design loadHS 25 or greater
Structure length667 ft (203.3 m)
Longest span75 ft (22.8 m)
Deck width76 ft (23.3 m)
Roadway width64 ft (19.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic25,774 (2019)
Projected traffic30,658 by 2041
Trucks1%
Lanes on structure4
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed15.5 mi (25 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$23.7 million (2024 estimate)
NavigationNavigation control on waterway (bridge permit required)

Frequently asked questions

When was RTE 908C over Swift Creek built?

It was built in 1999, making it 26 years old in 2025.

What condition is RTE 908C over Swift Creek in?

The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in October 2023.

How much traffic does RTE 908C over Swift Creek carry?

About 25,774 vehicles per day (2019 count), of which roughly 1% are trucks.

How long is RTE 908C over Swift Creek?

The structure is 667 ft (203.3 m) long with a longest span of 75 ft (22.8 m) and a deck 76 ft wide.

Who owns RTE 908C over Swift Creek?

It is owned by the State Highway Agency.