US Bridges

RTE 345 over Brandy Brook

Good

St. Lawrence County, New York · 3.4 MI SE JCT Rts 345+ 37 · Structure no. 000000001094720

Built
1961
64 years old, rebuilt 2021
Condition
Good
inspected September 2023
Type
Culvert
Steel
Length
39 ft
2 main spans
Daily traffic
1,233
2020 count
Owner
State
State Highway Agency

About this bridge

RTE 345 over Brandy Brook is a steel culvert carrying RTE 345 over Brandy Brook in St. Lawrence County, New York. It was built in 1961 and reconstructed in 2021, so it is 64 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 1,233 vehicles a day, roughly 16% of them trucks, projected to reach 1,286 by 2041. The structure is 39 ft (11.9 m) long. If it were closed, the detour would be 7.5 mi (12 km).

Location

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CarriesRTE 345
CrossesBrandy Brook
Location3.4 MI SE JCT Rts 345+ 37
RouteState Highway 345
CountySt. Lawrence County
StateNew York
Coordinates44.80534, -75.16971
Functional classRural Major Collector

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Channel and channel protection7 GoodSome minor problems.
Culvert7 GoodSome minor problems.
Last inspectionSeptember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation7: Better than present minimum criteria
Waterway adequacy4: Meets minimum tolerable limits to be left in place as is
Approach roadway alignment4: Meets minimum tolerable limits to be left in place as is
Operating rating84.5 US tons
Inventory rating36 US tons

Structure

Structure typeCulvert
MaterialSteel
DeckNot applicable
Main spans2
Design loadHS 25 or greater
Structure length39 ft (11.9 m)
Longest span19 ft (5.7 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,233 (2020)
Projected traffic1,286 by 2041
Trucks16%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed7.5 mi (12 km)
TollOn a free road
National Highway SystemNo

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$497,000 (2024 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was RTE 345 over Brandy Brook built?

It was built in 1961, making it 64 years old in 2025. It was reconstructed in 2021.

What condition is RTE 345 over Brandy 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 September 2023.

How much traffic does RTE 345 over Brandy Brook carry?

About 1,233 vehicles per day (2020 count), of which roughly 16% are trucks.

How long is RTE 345 over Brandy Brook?

The structure is 39 ft (11.9 m) long with a longest span of 19 ft (5.7 m).

Who owns RTE 345 over Brandy Brook?

It is owned by the State Highway Agency.