US Bridges

County Road 9 over Knights Creek

Good

Allegany County, New York · 1.7 MI SW of RTE 19 · Structure no. 000000003330520

Built
1980
45 years old, rebuilt 2023
Condition
Good
inspected December 2023
Type
Box Beam or Girders - Multiple
Prestressed Concrete
Length
66 ft
1 main span
Daily traffic
927
2019 count
Owner
County
County Highway Agency

About this bridge

County Road 9 over Knights Creek is a prestressed concrete box beam or girders - multiple carrying County Road 9 over Knights Creek in Allegany County, New York. It was built in 1980 and reconstructed in 2023, so it is 45 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 927 vehicles a day, roughly 5% of them trucks, projected to reach 967 by 2041. The structure is 66 ft (20 m) long and 32 ft wide. If it were closed, the detour would be 6.8 mi (11 km).

Location

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CarriesCounty Road 9
CrossesKnights Creek
Location1.7 MI SW of RTE 19
RouteCounty Highway 0
CountyAllegany County
StateNew York
Coordinates42.15524, -78.00235
Functional classRural Major Collector

Condition and inspection

Good

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

ComponentRatingMeaning
Deck9 ExcellentNo problems noted.
Superstructure9 ExcellentNo problems noted.
Substructure7 GoodSome minor problems.
Channel and channel protection7 GoodSome minor problems.
Last inspectionDecember 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 geometry6: Equal to present minimum criteria
Waterway adequacy5: Somewhat better than minimum adequacy to tolerate being left in place as is
Approach roadway alignment7: Better than present minimum criteria
Operating rating99 US tons
Inventory rating59 US tons

Structure

Structure typeBox Beam or Girders - Multiple
MaterialPrestressed Concrete
DeckNot applicable
Main spans1
Design loadHL 93
Structure length66 ft (20 m)
Longest span64 ft (19.5 m)
Deck width32 ft (9.9 m)
Roadway width30 ft (9.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic927 (2019)
Projected traffic967 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$1.4 million (2024 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was County Road 9 over Knights Creek built?

It was built in 1980, making it 45 years old in 2025. It was reconstructed in 2023.

What condition is County Road 9 over Knights 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 December 2023.

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

About 927 vehicles per day (2019 count), of which roughly 5% are trucks.

How long is County Road 9 over Knights Creek?

The structure is 66 ft (20 m) long with a longest span of 64 ft (19.5 m) and a deck 32 ft wide.

Who owns County Road 9 over Knights Creek?

It is owned by the County Highway Agency.