US Bridges

County Road 39 over Grass River

Good

St. Lawrence County, New York · At Louisville · Structure no. 000000003341230

Built
2010
15 years old
Condition
Good
inspected July 2024
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
388 ft
3 main spans
Daily traffic
686
2019 count
Owner
County
County Highway Agency

About this bridge

County Road 39 over Grass River is a steel continuous stringer/multi-beam or girder carrying County Road 39 over Grass River in St. Lawrence County, New York. It was built in 2010, so it is 15 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 8 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 686 vehicles a day, roughly 9% of them trucks, projected to reach 960 by 2039. The structure is 388 ft (118.3 m) long and 38 ft wide. If it were closed, the detour would be 11.8 mi (19 km).

CarriesCounty Road 39
CrossesGrass River
LocationAt Louisville
RouteCounty Highway 0
Coordinates44.89862, -75.01678
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
Deck8 Very GoodNo problems noted.
Superstructure9 ExcellentNo problems noted.
Substructure9 ExcellentNo problems noted.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionJuly 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation9: Superior to present desirable criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment4: Meets minimum tolerable limits to be left in place as is
Operating rating91.1 US tons
Inventory rating54 US tons

Structure

MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHL 93
Structure length388 ft (118.3 m)
Longest span154 ft (46.9 m)
Deck width38 ft (11.6 m)
Roadway width30 ft (9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic686 (2019)
Projected traffic960 by 2039
Trucks9%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed11.8 mi (19 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$5 million (2024 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was County Road 39 over Grass River built?

It was built in 2010, making it 15 years old in 2025.

What condition is County Road 39 over Grass 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 July 2024.

How much traffic does County Road 39 over Grass River carry?

About 686 vehicles per day (2019 count), of which roughly 9% are trucks.

How long is County Road 39 over Grass River?

The structure is 388 ft (118.3 m) long with a longest span of 154 ft (46.9 m) and a deck 38 ft wide.

Who owns County Road 39 over Grass River?

It is owned by the County Highway Agency.