US Bridges

Island Branch RD over Oswegatchie River

Good

St. Lawrence County, New York · In Hailesboro · Structure no. 000000003340990

Built
2004
21 years old
Condition
Good
inspected May 2024
Type
Box Beam or Girders - Multiple
Prestressed Concrete
Length
102 ft
1 main span
Daily traffic
322
2018 count
Owner
County
County Highway Agency

About this bridge

Island Branch RD over Oswegatchie River is a prestressed concrete box beam or girders - multiple carrying Island Branch RD over Oswegatchie River in St. Lawrence County, New York. It was built in 2004, so it is 21 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 322 vehicles a day, roughly 12% of them trucks, projected to reach 451 by 2038. The structure is 102 ft (31.1 m) long and 29 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

CarriesIsland Branch RD
CrossesOswegatchie River
LocationIn Hailesboro
Coordinates44.31058, -75.44466
Functional classRural Local

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.
Substructure8 Very GoodNo problems noted.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionMay 2024
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 alignment4: Meets minimum tolerable limits to be left in place as is
Operating rating75.9 US tons
Inventory rating46 US tons

Structure

MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans1
Design loadHS 25 or greater
Structure length102 ft (31.1 m)
Longest span99 ft (30.1 m)
Deck width29 ft (8.8 m)
Roadway width26 ft (7.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic322 (2018)
Projected traffic451 by 2038
Trucks12%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.9 mi (3 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCounty Highway Agency
Maintained byCounty Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedWidening with deck rehabilitation or replacement
Estimated improvement cost$916,000 (2024 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Island Branch RD over Oswegatchie River built?

It was built in 2004, making it 21 years old in 2025.

What condition is Island Branch RD over Oswegatchie River 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 May 2024.

How much traffic does Island Branch RD over Oswegatchie River carry?

About 322 vehicles per day (2018 count), of which roughly 12% are trucks.

How long is Island Branch RD over Oswegatchie River?

The structure is 102 ft (31.1 m) long with a longest span of 99 ft (30.1 m) and a deck 29 ft wide.

Who owns Island Branch RD over Oswegatchie River?

It is owned by the County Highway Agency.