US Bridges

Sinkhole Road over Lyon Brook

Fair

Franklin County, New York · 1.75 MI NE Vermontville · Structure no. 000000003369360

Built
1927
98 years old
Condition
Fair
inspected July 2023
Type
Slab
Concrete
Length
25 ft
1 main span
Daily traffic
11
2017 count
Owner
Town / Township
Town or Township Highway Agency

About this bridge

Sinkhole Road over Lyon Brook is a concrete slab carrying Sinkhole Road over Lyon Brook in Franklin County, New York. It was built in 1927, so it is 98 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 11 vehicles a day, roughly 17% of them trucks, projected to reach 15 by 2037. The structure is 25 ft (7.6 m) long and 32 ft wide. If it were closed, the detour would be 0.6 mi (1 km).

Location

Open in Google Maps
CarriesSinkhole Road
CrossesLyon Brook
Location1.75 MI NE Vermontville
CountyFranklin County
StateNew York
Coordinates44.47405, -74.05278
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
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
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 inspectionJuly 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; action required to protect exposed foundations
Structural evaluation6: Equal to present minimum criteria
Deck geometry7: Better than present minimum criteria
Waterway adequacy5: Somewhat better than minimum adequacy to tolerate being left in place as is
Approach roadway alignment8: Equal to present desirable criteria
Operating rating68 US tons
Inventory rating40 US tons

Structure

Structure typeSlab
MaterialConcrete
DeckNot applicable
Main spans1
Design loadUnknown
Structure length25 ft (7.6 m)
Longest span22 ft (6.7 m)
Deck width32 ft (9.9 m)
Roadway width30 ft (9.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic11 (2017)
Projected traffic15 by 2037
Trucks17%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed0.6 mi (1 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerTown or Township Highway Agency
Maintained byTown or Township Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedWidening with deck rehabilitation or replacement
Estimated improvement cost$427,000 (2024 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Sinkhole Road over Lyon Brook built?

It was built in 1927, making it 98 years old in 2025.

What condition is Sinkhole Road over Lyon 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 July 2023.

How much traffic does Sinkhole Road over Lyon Brook carry?

About 11 vehicles per day (2017 count), of which roughly 17% are trucks.

How long is Sinkhole Road over Lyon Brook?

The structure is 25 ft (7.6 m) long with a longest span of 22 ft (6.7 m) and a deck 32 ft wide.

Who owns Sinkhole Road over Lyon Brook?

It is owned by the Town or Township Highway Agency.