US Bridges

County Road 66 over Mill Creek

Fair

Chautauqua County, New York · At Sinclairville CO RD 49 · Structure no. 000000003326140

Built
1959
66 years old
Condition
Fair
inspected July 2023
Type
Stringer/Multi-beam or Girder
Steel
Length
85 ft
1 main span
Daily traffic
1,321
2021 count
Owner
County
County Highway Agency

About this bridge

County Road 66 over Mill Creek is a steel stringer/multi-beam or girder carrying County Road 66 over Mill Creek in Chautauqua County, New York. It was built in 1959, so it is 66 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 6 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 1,321 vehicles a day, roughly 6% of them trucks, projected to reach 1,334 by 2041. The structure is 85 ft (25.9 m) long and 38 ft wide. If it were closed, the detour would be 0.6 mi (1 km).

Location

Open in Google Maps
CarriesCounty Road 66
CrossesMill Creek
LocationAt Sinclairville CO RD 49
RouteCounty Highway 0
CountyChautauqua County
StateNew York
Coordinates42.2628, -79.26298
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
Deck7 GoodSome minor problems.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionJuly 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourScour critical; foundations unstable for calculated scour conditions
Structural evaluation6: Equal to 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 alignment7: Better than present minimum criteria
Operating rating61.9 US tons
Inventory rating37 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20
Structure length85 ft (25.9 m)
Longest span78 ft (23.7 m)
Deck width38 ft (11.7 m)
Roadway width30 ft (9.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,321 (2021)
Projected traffic1,334 by 2041
Trucks6%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed0.6 mi (1 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$3.7 million (2024 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was County Road 66 over Mill Creek built?

It was built in 1959, making it 66 years old in 2025.

What condition is County Road 66 over Mill 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 July 2023.

How much traffic does County Road 66 over Mill Creek carry?

About 1,321 vehicles per day (2021 count), of which roughly 6% are trucks.

How long is County Road 66 over Mill Creek?

The structure is 85 ft (25.9 m) long with a longest span of 78 ft (23.7 m) and a deck 38 ft wide.

Who owns County Road 66 over Mill Creek?

It is owned by the County Highway Agency.