US Bridges

RTE 37 over Grasse River

Fair

St. Lawrence County, New York · .5 M W RTE 37 and 56 Int · Structure no. 000000001023880

Built
1956
69 years old, rebuilt 1989
Condition
Fair
inspected September 2023
Type
Stringer/Multi-beam or Girder
Steel
Length
520 ft
4 main spans
Daily traffic
5,150
2021 count
Owner
State
State Highway Agency

About this bridge

RTE 37 over Grasse River is a steel stringer/multi-beam or girder carrying RTE 37 over Grasse River in St. Lawrence County, New York. It was built in 1956 and reconstructed in 1989, so it is 69 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 5,150 vehicles a day, roughly 10% of them trucks, projected to reach 5,174 by 2041. The structure is 520 ft (158.5 m) long and 43 ft wide. If it were closed, the detour would be 2.5 mi (4 km).

CarriesRTE 37
CrossesGrasse River
Location.5 M W RTE 37 and 56 Int
RouteState Highway 37
Coordinates44.92241, -74.92685
Functional classUrban Other Principal Arterial

Condition and inspection

Fair

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

ComponentRatingMeaning
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure7 GoodSome minor problems.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionSeptember 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 adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating58 US tons
Inventory rating35.1 US tons

Structure

MaterialSteel
DeckConcrete, cast-in-place
Main spans4
Design loadHS 20
Structure length520 ft (158.5 m)
Longest span130 ft (39.6 m)
Deck width43 ft (13.2 m)
Roadway width36 ft (11 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic5,150 (2021)
Projected traffic5,174 by 2041
Trucks10%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed2.5 mi (4 km)
TollOn a free road
National Highway SystemYes

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusEligible for the National Register of Historic Places
Work proposedWidening with deck rehabilitation or replacement
Estimated improvement cost$7 million (2024 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was RTE 37 over Grasse River built?

It was built in 1956, making it 69 years old in 2025. It was reconstructed in 1989.

What condition is RTE 37 over 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 September 2023.

How much traffic does RTE 37 over Grasse River carry?

About 5,150 vehicles per day (2021 count), of which roughly 10% are trucks.

How long is RTE 37 over Grasse River?

The structure is 520 ft (158.5 m) long with a longest span of 130 ft (39.6 m) and a deck 43 ft wide.

Who owns RTE 37 over Grasse River?

It is owned by the State Highway Agency.