US Bridges

Flatstone Road over Chipmunk Creek

Good

Cattaraugus County, New York · 0.1 MI SW of Chipmunk · Structure no. 000000003320500

Built
1993
32 years old
Condition
Good
inspected June 2023
Type
Stringer/Multi-beam or Girder
Steel
Length
34 ft
1 main span
Daily traffic
32
2020 count
Owner
County
County Highway Agency

About this bridge

Flatstone Road over Chipmunk Creek is a steel stringer/multi-beam or girder carrying Flatstone Road over Chipmunk Creek in Cattaraugus County, New York. It was built in 1993, so it is 32 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 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 32 vehicles a day, roughly 6% of them trucks, projected to reach 45 by 2040. The structure is 34 ft (10.4 m) long and 24 ft wide. If it were closed, the detour would be 123.7 mi (199 km).

CarriesFlatstone Road
CrossesChipmunk Creek
Location0.1 MI SW of Chipmunk
Coordinates42.05623, -78.5765
Functional classRural Local

Condition and inspection

Good

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

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure8 Very GoodNo problems noted.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionJune 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
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy4: Meets minimum tolerable limits to be left in place as is
Approach roadway alignment8: Equal to present desirable criteria
Operating rating83 US tons
Inventory rating49.1 US tons

Structure

MaterialSteel
DeckWood or timber
Main spans1
Design loadHS 20
Structure length34 ft (10.4 m)
Longest span33 ft (10 m)
Deck width24 ft (7.3 m)
Roadway width23 ft (6.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic32 (2020)
Projected traffic45 by 2040
Trucks6%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed123.7 mi (199 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$1.9 million (2024 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Flatstone Road over Chipmunk Creek built?

It was built in 1993, making it 32 years old in 2025.

What condition is Flatstone Road over Chipmunk Creek 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 June 2023.

How much traffic does Flatstone Road over Chipmunk Creek carry?

About 32 vehicles per day (2020 count), of which roughly 6% are trucks.

How long is Flatstone Road over Chipmunk Creek?

The structure is 34 ft (10.4 m) long with a longest span of 33 ft (10 m) and a deck 24 ft wide.

Who owns Flatstone Road over Chipmunk Creek?

It is owned by the County Highway Agency.