US Bridges

County Road 27 over Oswegatchie River

Fair

St. Lawrence County, New York · 2.4 Miles East of Fine · Structure no. 000000003340910

Built
1930
95 years old
Condition
Fair
inspected June 2023
Type
Arch - Deck
Concrete Continuous
Length
213 ft
3 main spans
Daily traffic
520
2015 count
Owner
County
County Highway Agency

About this bridge

County Road 27 over Oswegatchie River is a concrete continuous arch - deck carrying County Road 27 over Oswegatchie River in St. Lawrence County, New York. It was built in 1930, so it is 95 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 5 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 520 vehicles a day, roughly 11% of them trucks, projected to reach 542 by 2041. The structure is 213 ft (64.9 m) long and 26 ft wide. If it were closed, the detour would be 5 mi (8 km).

Location

Open in Google Maps
CarriesCounty Road 27
CrossesOswegatchie River
Location2.4 Miles East of Fine
RouteCounty Highway 0
CountySt. Lawrence County
StateNew York
Coordinates44.23851, -75.09334
Functional classRural Major Collector

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.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionJune 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; action required to protect exposed foundations
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment5: Somewhat better than minimum adequacy to tolerate being left in place as is
Operating rating65 US tons
Inventory rating25.6 US tons

Structure

Structure typeArch - Deck
MaterialConcrete Continuous
DeckNot applicable
Main spans3
Design loadUnknown
Structure length213 ft (64.9 m)
Longest span68 ft (20.7 m)
Deck width26 ft (7.9 m)
Roadway width24 ft (7.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic520 (2015)
Projected traffic542 by 2041
Trucks11%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed5 mi (8 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 proposedWidening with deck rehabilitation or replacement
Estimated improvement cost$4.2 million (2024 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was County Road 27 over Oswegatchie River built?

It was built in 1930, making it 95 years old in 2025.

What condition is County Road 27 over Oswegatchie River 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 June 2023.

How much traffic does County Road 27 over Oswegatchie River carry?

About 520 vehicles per day (2015 count), of which roughly 11% are trucks.

How long is County Road 27 over Oswegatchie River?

The structure is 213 ft (64.9 m) long with a longest span of 68 ft (20.7 m) and a deck 26 ft wide.

Who owns County Road 27 over Oswegatchie River?

It is owned by the County Highway Agency.