US Bridges

County Road 77 over Mill Creek

Fair

Chautauqua County, New York · .2 MI N of Charlotte Ctr · Structure no. 000000003323800

Built
1996
29 years old
Condition
Fair
inspected July 2023
Type
Box Beam or Girders - Multiple
Prestressed Concrete
Length
54 ft
1 main span
Daily traffic
472
2021 count
Owner
County
County Highway Agency

About this bridge

County Road 77 over Mill Creek is a prestressed concrete box beam or girders - multiple carrying County Road 77 over Mill Creek in Chautauqua County, New York. It was built in 1996, so it is 29 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 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 472 vehicles a day, roughly 7% of them trucks, projected to reach 661 by 2041. The structure is 54 ft (16.5 m) long and 33 ft wide. If it were closed, the detour would be 7.5 mi (12 km).

Location

Open in Google Maps
CarriesCounty Road 77
CrossesMill Creek
Location.2 MI N of Charlotte Ctr
RouteCounty Highway 0
CountyChautauqua County
StateNew York
Coordinates42.30735, -79.236
Functional classRural Minor 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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure7 GoodSome minor problems.
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
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation6: Equal to 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 alignment8: Equal to present desirable criteria
Operating rating93 US tons
Inventory rating50 US tons

Structure

Structure typeBox Beam or Girders - Multiple
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans1
Design loadHS 25 or greater
Structure length54 ft (16.5 m)
Longest span50 ft (15.2 m)
Deck width33 ft (10.1 m)
Roadway width31 ft (9.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic472 (2021)
Projected traffic661 by 2041
Trucks7%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed7.5 mi (12 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$704,000 (2024 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was County Road 77 over Mill Creek built?

It was built in 1996, making it 29 years old in 2025.

What condition is County Road 77 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 77 over Mill Creek carry?

About 472 vehicles per day (2021 count), of which roughly 7% are trucks.

How long is County Road 77 over Mill Creek?

The structure is 54 ft (16.5 m) long with a longest span of 50 ft (15.2 m) and a deck 33 ft wide.

Who owns County Road 77 over Mill Creek?

It is owned by the County Highway Agency.