US Bridges

County Road 46 over Spring Brook

Good

St. Lawrence County, New York · 1.3 Miles South of Jct. R · Structure no. 000000003341310

Built
1963
62 years old
Condition
Good
inspected August 2023
Type
Stringer/Multi-beam or Girder
Steel
Length
113 ft
1 main span
Daily traffic
377
2018 count
Owner
County
County Highway Agency

About this bridge

County Road 46 over Spring Brook is a steel stringer/multi-beam or girder carrying County Road 46 over Spring Brook in St. Lawrence County, New York. It was built in 1963, so it is 62 years old, older 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 377 vehicles a day, roughly 14% of them trucks, projected to reach 528 by 2038. The structure is 113 ft (34.4 m) long and 31 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

Location

Open in Google Maps
CarriesCounty Road 46
CrossesSpring Brook
Location1.3 Miles South of Jct. R
RouteCounty Highway 0
CountySt. Lawrence County
StateNew York
Coordinates44.94144, -74.79672
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.
Superstructure7 GoodSome minor problems.
Substructure8 Very GoodNo problems noted.
Channel and channel protection9 ExcellentNo problems noted.
Last inspectionAugust 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourScour critical; foundations unstable for calculated scour conditions
Structural evaluation7: Better than present minimum 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 alignment7: Better than present minimum criteria
Operating rating97 US tons
Inventory rating58 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20
Structure length113 ft (34.4 m)
Longest span106 ft (32.3 m)
Deck width31 ft (9.5 m)
Roadway width26 ft (7.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic377 (2018)
Projected traffic528 by 2038
Trucks14%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.7 mi (6 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 proposedDeck replacement with only incidental widening
Estimated improvement cost$1.4 million (2024 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was County Road 46 over Spring Brook built?

It was built in 1963, making it 62 years old in 2025.

What condition is County Road 46 over Spring Brook 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 August 2023.

How much traffic does County Road 46 over Spring Brook carry?

About 377 vehicles per day (2018 count), of which roughly 14% are trucks.

How long is County Road 46 over Spring Brook?

The structure is 113 ft (34.4 m) long with a longest span of 106 ft (32.3 m) and a deck 31 ft wide.

Who owns County Road 46 over Spring Brook?

It is owned by the County Highway Agency.