US Bridges

RTE 3 over S Br Grasse River

Fair

St. Lawrence County, New York · JCT SH 3 & S B Grasse Rvr · Structure no. 000000001000720

Built
1980
45 years old
Condition
Fair
inspected June 2023
Type
Stringer/Multi-beam or Girder
Steel
Length
135 ft
1 main span
Daily traffic
1,333
2021 count
Owner
State
State Highway Agency

About this bridge

RTE 3 over S Br Grasse River is a steel stringer/multi-beam or girder carrying RTE 3 over S Br Grasse River in St. Lawrence County, New York. It was built in 1980, so it is 45 years old, younger 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 6 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 1,333 vehicles a day, roughly 14% of them trucks, projected to reach 1,345 by 2041. The structure is 135 ft (41.1 m) long and 42 ft wide. If it were closed, the detour would be 10.6 mi (17 km).

Location

Open in Google Maps
CarriesRTE 3
CrossesS Br Grasse River
LocationJCT SH 3 & S B Grasse Rvr
RouteState Highway 3
CountySt. Lawrence County
StateNew York
Coordinates44.24766, -74.77737
Functional classRural Principal Arterial - Other

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure7 GoodSome minor problems.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
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 evaluation6: Equal to present minimum criteria
Deck geometry7: Better than present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating110.1 US tons
Inventory rating70 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20
Structure length135 ft (41.1 m)
Longest span132 ft (40.2 m)
Deck width42 ft (12.9 m)
Roadway width40 ft (12.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,333 (2021)
Projected traffic1,345 by 2041
Trucks14%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed10.6 mi (17 km)
TollOn a free road
National Highway SystemYes

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedWidening with deck rehabilitation or replacement
Estimated improvement cost$2.4 million (2024 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was RTE 3 over S Br Grasse River built?

It was built in 1980, making it 45 years old in 2025.

What condition is RTE 3 over S Br Grasse 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 RTE 3 over S Br Grasse River carry?

About 1,333 vehicles per day (2021 count), of which roughly 14% are trucks.

How long is RTE 3 over S Br Grasse River?

The structure is 135 ft (41.1 m) long with a longest span of 132 ft (40.2 m) and a deck 42 ft wide.

Who owns RTE 3 over S Br Grasse River?

It is owned by the State Highway Agency.