US Bridges

Chisholm RD over Oswegatchie River

Good

St. Lawrence County, New York · 1.0 MI from Wegatchie · Structure no. 000000003221680

Built
1992
33 years old
Condition
Good
inspected June 2024
Type
Truss - Thru
Steel
Length
232 ft
1 main span
Daily traffic
34
2018 count
Owner
County
County Highway Agency

About this bridge

Chisholm RD over Oswegatchie River is a steel truss - thru carrying Chisholm RD over Oswegatchie River in St. Lawrence County, New York. It was built in 1992, so it is 33 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 34 vehicles a day, projected to reach 48 by 2038. The structure is 232 ft (70.7 m) long and 16 ft wide. If it were closed, the detour would be 123.7 mi (199 km).

CarriesChisholm RD
CrossesOswegatchie River
Location1.0 MI from Wegatchie
Coordinates44.30082, -75.59388
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.
Superstructure8 Very GoodNo problems noted.
Substructure8 Very GoodNo problems noted.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionJune 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation8: Equal to present desirable criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment3: Basically intolerable, requiring high priority of corrective action
Operating rating55 US tons
Inventory rating37 US tons

Structure

Structure typeTruss - Thru
MaterialSteel
DeckWood or timber
Main spans1
Design loadHS 20
Structure length232 ft (70.7 m)
Longest span227 ft (69.1 m)
Deck width16 ft (4.9 m)
Roadway width14 ft (4.3 m)
Vertical clearance over deck16 ft (4.9 m)

Traffic and service

Average daily traffic34 (2018)
Projected traffic48 by 2038
Trucks0%
Lanes on structure1
Traffic directionOne-lane bridge for two-way traffic
CarriesHighway
CrossesWaterway
Detour if closed123.7 mi (199 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$4.3 million (2024 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Chisholm RD over Oswegatchie River built?

It was built in 1992, making it 33 years old in 2025.

What condition is Chisholm 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 June 2024.

How much traffic does Chisholm RD over Oswegatchie River carry?

About 34 vehicles per day (2018 count).

How long is Chisholm RD over Oswegatchie River?

The structure is 232 ft (70.7 m) long with a longest span of 227 ft (69.1 m) and a deck 16 ft wide.

Who owns Chisholm RD over Oswegatchie River?

It is owned by the County Highway Agency.