US Bridges

County Road 77 over Mill Creek

Good

Chautauqua County, New York · 1.3 MI S of Charlotte Cen · Structure no. 000000003323820

Built
2009
16 years old
Condition
Good
inspected August 2023
Type
Box Beam or Girders - Multiple
Prestressed Concrete
Length
49 ft
1 main span
Daily traffic
647
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 2009, so it is 16 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 647 vehicles a day, roughly 6% of them trucks, projected to reach 906 by 2041. The structure is 49 ft (14.9 m) long and 32 ft wide. If it were closed, the detour would be 5 mi (8 km).

CarriesCounty Road 77
CrossesMill Creek
Location1.3 MI S of Charlotte Cen
RouteCounty Highway 0
Coordinates42.28664, -79.2462
Functional classRural Minor Collector

Condition and inspection

Good

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

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure8 Very GoodNo problems noted.
Substructure8 Very GoodNo problems noted.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionAugust 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation8: Equal to present desirable 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 alignment8: Equal to present desirable criteria
Operating rating88 US tons
Inventory rating52 US tons

Structure

MaterialPrestressed Concrete
DeckNot applicable
Main spans1
Design loadHS 25 or greater
Structure length49 ft (14.9 m)
Longest span46 ft (14 m)
Deck width32 ft (9.9 m)
Roadway width30 ft (9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic647 (2021)
Projected traffic906 by 2041
Trucks6%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed5 mi (8 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 77 over Mill Creek built?

It was built in 2009, making it 16 years old in 2025.

What condition is County Road 77 over Mill 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 August 2023.

How much traffic does County Road 77 over Mill Creek carry?

About 647 vehicles per day (2021 count), of which roughly 6% are trucks.

How long is County Road 77 over Mill Creek?

The structure is 49 ft (14.9 m) long with a longest span of 46 ft (14 m) and a deck 32 ft wide.

Who owns County Road 77 over Mill Creek?

It is owned by the County Highway Agency.