US Bridges

County Road 9 over Twentymile Creek

Fair

Chautauqua County, New York · 0.7 MI N of South Ripley · Structure no. 000000003325470

Built
1990
35 years old
Condition
Fair
inspected April 2023
Type
Box Beam or Girders - Multiple
Prestressed Concrete
Length
85 ft
1 main span
Daily traffic
113
2019 count
Owner
County
County Highway Agency

About this bridge

County Road 9 over Twentymile Creek is a prestressed concrete box beam or girders - multiple carrying County Road 9 over Twentymile Creek in Chautauqua County, New York. It was built in 1990, so it is 35 years old, younger 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 113 vehicles a day, roughly 3% of them trucks, projected to reach 158 by 2039. The structure is 85 ft (25.9 m) long and 28 ft wide. If it were closed, the detour would be 5.6 mi (9 km).

Location

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CarriesCounty Road 9
CrossesTwentymile Creek
Location0.7 MI N of South Ripley
RouteCounty Highway 0
CountyChautauqua County
StateNew York
Coordinates42.20441, -79.70187
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.
Superstructure8 Very GoodNo problems noted.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionApril 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating98 US tons
Inventory rating47 US tons

Structure

Structure typeBox Beam or Girders - Multiple
MaterialPrestressed Concrete
DeckNot applicable
Main spans1
Design loadHS 20
Structure length85 ft (25.9 m)
Longest span81 ft (24.6 m)
Deck width28 ft (8.6 m)
Roadway width27 ft (8.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic113 (2019)
Projected traffic158 by 2039
Trucks3%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed5.6 mi (9 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$2.1 million (2024 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was County Road 9 over Twentymile Creek built?

It was built in 1990, making it 35 years old in 2025.

What condition is County Road 9 over Twentymile Creek 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 April 2023.

How much traffic does County Road 9 over Twentymile Creek carry?

About 113 vehicles per day (2019 count), of which roughly 3% are trucks.

How long is County Road 9 over Twentymile Creek?

The structure is 85 ft (25.9 m) long with a longest span of 81 ft (24.6 m) and a deck 28 ft wide.

Who owns County Road 9 over Twentymile Creek?

It is owned by the County Highway Agency.