US Bridges

County Road 11 over Oswegatchie River

Good

St. Lawrence County, New York · 4 Miles N of Gouverneur · Structure no. 000000003341030

Built
1929
96 years old, rebuilt 2005
Condition
Good
inspected October 2023
Type
Arch - Deck
Concrete
Length
222 ft
1 main span
Daily traffic
580
2019 count
Owner
County
County Highway Agency

About this bridge

County Road 11 over Oswegatchie River is a concrete arch - deck carrying County Road 11 over Oswegatchie River in St. Lawrence County, New York. It was built in 1929 and reconstructed in 2005, so it is 96 years old, older 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 580 vehicles a day, roughly 7% of them trucks, projected to reach 812 by 2039. The structure is 222 ft (67.7 m) long and 33 ft wide. If it were closed, the detour would be 2.5 mi (4 km).

Location

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CarriesCounty Road 11
CrossesOswegatchie River
Location4 Miles N of Gouverneur
RouteCounty Highway 0
CountySt. Lawrence County
StateNew York
Coordinates44.39539, -75.45374
Functional classRural Minor Collector

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 protection9 ExcellentNo problems noted.
Last inspectionOctober 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
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 alignment3: Basically intolerable, requiring high priority of corrective action
Operating rating74 US tons
Inventory rating44 US tons

Structure

Structure typeArch - Deck
MaterialConcrete
DeckConcrete, cast-in-place
Main spans1 (+2 approach)
Design loadHS 20
Structure length222 ft (67.7 m)
Longest span168 ft (51.2 m)
Deck width33 ft (10.1 m)
Roadway width30 ft (9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic580 (2019)
Projected traffic812 by 2039
Trucks7%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed2.5 mi (4 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCounty Highway Agency
Maintained byCounty Highway Agency
Historic statusEligible for the National Register of Historic Places
Work proposedDeck replacement with only incidental widening
Estimated improvement cost$6.7 million (2024 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was County Road 11 over Oswegatchie River built?

It was built in 1929, making it 96 years old in 2025. It was reconstructed in 2005.

What condition is County Road 11 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 October 2023.

How much traffic does County Road 11 over Oswegatchie River carry?

About 580 vehicles per day (2019 count), of which roughly 7% are trucks.

How long is County Road 11 over Oswegatchie River?

The structure is 222 ft (67.7 m) long with a longest span of 168 ft (51.2 m) and a deck 33 ft wide.

Who owns County Road 11 over Oswegatchie River?

It is owned by the County Highway Agency.