US Bridges

County Road 10 over Slippery Rock Crk

GoodPosted for load

Chautauqua County, New York · 0.5 MI North of Brocton · Structure no. 000000003047140

Built
1993
32 years old
Condition
Good
inspected March 2023
Type
Stringer/Multi-beam or Girder
Wood or Timber
Length
29 ft
1 main span
Daily traffic
1,286
2021 count
Owner
County
County Highway Agency

About this bridge

County Road 10 over Slippery Rock Crk is a wood or timber stringer/multi-beam or girder carrying County Road 10 over Slippery Rock Crk in Chautauqua County, New York. It was built in 1993, so it is 32 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. Its operating status is: posted for other load-capacity restriction.

It carries about 1,286 vehicles a day, roughly 2% of them trucks, projected to reach 1,298 by 2041. The structure is 29 ft (8.8 m) long and 38 ft wide. If it were closed, the detour would be 16.8 mi (27 km).

Location

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CarriesCounty Road 10
CrossesSlippery Rock Crk
Location0.5 MI North of Brocton
RouteCounty Highway 0
CountyChautauqua County
StateNew York
Coordinates42.39514, -79.44111
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
Deck8 Very GoodNo problems noted.
Superstructure7 GoodSome minor problems.
Substructure8 Very GoodNo problems noted.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionMarch 2023
Inspection intervalevery 24 months
Operating statusPosted for other load-capacity restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating48 US tons
Inventory rating33 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialWood or Timber
DeckWood or timber
Main spans1
Design loadHS 25 or greater
Structure length29 ft (8.8 m)
Longest span27 ft (8.2 m)
Deck width38 ft (11.5 m)
Roadway width36 ft (10.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,286 (2021)
Projected traffic1,298 by 2041
Trucks2%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed16.8 mi (27 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$1.3 million (2024 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was County Road 10 over Slippery Rock Crk built?

It was built in 1993, making it 32 years old in 2025.

What condition is County Road 10 over Slippery Rock Crk 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 March 2023.

How much traffic does County Road 10 over Slippery Rock Crk carry?

About 1,286 vehicles per day (2021 count), of which roughly 2% are trucks.

How long is County Road 10 over Slippery Rock Crk?

The structure is 29 ft (8.8 m) long with a longest span of 27 ft (8.2 m) and a deck 38 ft wide.

Who owns County Road 10 over Slippery Rock Crk?

It is owned by the County Highway Agency.