US Bridges

Finnigan Road over Trout Brook

Fair

St. Lawrence County, New York · 1.5 MI SE of Brasher Fall · Structure no. 000000003341200

Built
1959
66 years old
Condition
Fair
inspected November 2023
Type
Stringer/Multi-beam or Girder
Steel
Length
32 ft
1 main span
Daily traffic
238
2020 count
Owner
County
County Highway Agency

About this bridge

Finnigan Road over Trout Brook is a steel stringer/multi-beam or girder carrying Finnigan Road over Trout Brook in St. Lawrence County, New York. It was built in 1959, so it is 66 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 238 vehicles a day, roughly 1% of them trucks, projected to reach 333 by 2040. The structure is 32 ft (9.8 m) long and 26 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

Open in Google Maps
CarriesFinnigan Road
CrossesTrout Brook
Location1.5 MI SE of Brasher Fall
CountySt. Lawrence County
StateNew York
Coordinates44.79261, -74.76354
Functional classRural Local

Condition and inspection

Fair

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

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionNovember 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 adequacy4: Meets minimum tolerable limits to be left in place as is
Approach roadway alignment6: Equal to present minimum criteria
Operating rating65 US tons
Inventory rating39 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans1
Design loadUnknown
Structure length32 ft (9.8 m)
Longest span26 ft (7.9 m)
Deck width26 ft (8 m)
Roadway width23 ft (7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic238 (2020)
Projected traffic333 by 2040
Trucks1%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.9 mi (3 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 proposedWidening with deck rehabilitation or replacement
Estimated improvement cost$467,000 (2024 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Finnigan Road over Trout Brook built?

It was built in 1959, making it 66 years old in 2025.

What condition is Finnigan Road over Trout Brook 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 November 2023.

How much traffic does Finnigan Road over Trout Brook carry?

About 238 vehicles per day (2020 count), of which roughly 1% are trucks.

How long is Finnigan Road over Trout Brook?

The structure is 32 ft (9.8 m) long with a longest span of 26 ft (7.9 m) and a deck 26 ft wide.

Who owns Finnigan Road over Trout Brook?

It is owned by the County Highway Agency.