US Bridges

RTE 345 over Big Sucker Brook

Good

St. Lawrence County, New York · 0.4 MI SE JCT Rts 345+ 37 · Structure no. 000000001046230

Built
2008
17 years old
Condition
Good
inspected October 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
126 ft
1 main span
Daily traffic
1,233
2020 count
Owner
State
State Highway Agency

About this bridge

RTE 345 over Big Sucker Brook is a steel stringer/multi-beam or girder carrying RTE 345 over Big Sucker Brook in St. Lawrence County, New York. It was built in 2008, so it is 17 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 1,233 vehicles a day, roughly 16% of them trucks, projected to reach 1,286 by 2041. The structure is 126 ft (38.4 m) long and 38 ft wide. If it were closed, the detour would be 5 mi (8 km).

Location

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CarriesRTE 345
CrossesBig Sucker Brook
Location0.4 MI SE JCT Rts 345+ 37
RouteState Highway 345
CountySt. Lawrence County
StateNew York
Coordinates44.85673, -75.19859
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
Deck8 Very GoodNo problems noted.
Superstructure9 ExcellentNo problems noted.
Substructure9 ExcellentNo problems noted.
Channel and channel protection9 ExcellentNo problems noted.
Last inspectionOctober 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 geometry6: Equal to present minimum criteria
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating110.1 US tons
Inventory rating71 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans1
Design loadHL 93
Structure length126 ft (38.4 m)
Longest span125 ft (38 m)
Deck width38 ft (11.7 m)
Roadway width35 ft (10.8 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 closed5 mi (8 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$1.8 million (2024 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was RTE 345 over Big Sucker Brook built?

It was built in 2008, making it 17 years old in 2025.

What condition is RTE 345 over Big Sucker 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 October 2024.

How much traffic does RTE 345 over Big Sucker Brook carry?

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

How long is RTE 345 over Big Sucker Brook?

The structure is 126 ft (38.4 m) long with a longest span of 125 ft (38 m) and a deck 38 ft wide.

Who owns RTE 345 over Big Sucker Brook?

It is owned by the State Highway Agency.