US Bridges

County Road 9 over Knight Creek

Fair

Allegany County, New York · 0.5 MI W of Scio · Structure no. 000000003330540

Built
1955
70 years old, rebuilt 1989
Condition
Fair
inspected October 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
105 ft
1 main span
Daily traffic
2,864
2018 count
Owner
County
County Highway Agency

About this bridge

County Road 9 over Knight Creek is a steel stringer/multi-beam or girder carrying County Road 9 over Knight Creek in Allegany County, New York. It was built in 1955 and reconstructed in 1989, so it is 70 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 2,864 vehicles a day, roughly 5% of them trucks, projected to reach 2,987 by 2041. The structure is 105 ft (32 m) long and 32 ft wide. If it were closed, the detour would be 6.8 mi (11 km).

Location

Open in Google Maps
CarriesCounty Road 9
CrossesKnight Creek
Location0.5 MI W of Scio
RouteCounty Highway 0
CountyAllegany County
StateNew York
Coordinates42.17082, -77.98809
Functional classRural Major Collector

Condition and inspection

Fair

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

ComponentRatingMeaning
Deck8 Very GoodNo problems noted.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection7 GoodSome minor problems.
Last inspectionOctober 2024
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 geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating77.1 US tons
Inventory rating46 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20
Structure length105 ft (32 m)
Longest span100 ft (30.5 m)
Deck width32 ft (9.8 m)
Roadway width30 ft (9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic2,864 (2018)
Projected traffic2,987 by 2041
Trucks5%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed6.8 mi (11 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 Knight Creek built?

It was built in 1955, making it 70 years old in 2025. It was reconstructed in 1989.

What condition is County Road 9 over Knight 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 October 2024.

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

About 2,864 vehicles per day (2018 count), of which roughly 5% are trucks.

How long is County Road 9 over Knight Creek?

The structure is 105 ft (32 m) long with a longest span of 100 ft (30.5 m) and a deck 32 ft wide.

Who owns County Road 9 over Knight Creek?

It is owned by the County Highway Agency.