US Bridges

French Road over Slate Bottom Crk

Fair

Erie County, New York · .8 MI N JCT US 20 & SH354 · Structure no. 000000003327200

Built
1967
58 years old
Condition
Fair
inspected September 2024
Type
Box Beam or Girders - Multiple
Prestressed Concrete
Length
37 ft
1 main span
Daily traffic
12,785
2018 count
Owner
County
County Highway Agency

About this bridge

French Road over Slate Bottom Crk is a prestressed concrete box beam or girders - multiple carrying French Road over Slate Bottom Crk in Erie County, New York. It was built in 1967, so it is 58 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 5 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 12,785 vehicles a day, roughly 2% of them trucks, projected to reach 13,500 by 2041. The structure is 37 ft (11.3 m) long and 69 ft wide. If it were closed, the detour would be 0.6 mi (1 km).

Location

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CarriesFrench Road
CrossesSlate Bottom Crk
Location.8 MI N JCT US 20 & SH354
RouteCounty Highway 0
CountyErie County
StateNew York
Coordinates42.86787, -78.70103
Functional classUrban Minor Arterial

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionSeptember 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry2: Basically intolerable, requiring high priority of replacement
Waterway adequacy5: Somewhat better than minimum adequacy to tolerate being left in place as is
Approach roadway alignment8: Equal to present desirable criteria
Operating rating56 US tons
Inventory rating25 US tons

Structure

Structure typeBox Beam or Girders - Multiple
MaterialPrestressed Concrete
DeckNot applicable
Main spans1
Design loadUnknown
Structure length37 ft (11.3 m)
Longest span35 ft (10.6 m)
Deck width69 ft (20.9 m)
Roadway width58 ft (17.7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic12,785 (2018)
Projected traffic13,500 by 2041
Trucks2%
Lanes on structure5
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 proposedDeck replacement with only incidental widening
Estimated improvement cost$2.5 million (2024 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was French Road over Slate Bottom Crk built?

It was built in 1967, making it 58 years old in 2025.

What condition is French Road over Slate Bottom Crk 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 September 2024.

How much traffic does French Road over Slate Bottom Crk carry?

About 12,785 vehicles per day (2018 count), of which roughly 2% are trucks.

How long is French Road over Slate Bottom Crk?

The structure is 37 ft (11.3 m) long with a longest span of 35 ft (10.6 m) and a deck 69 ft wide.

Who owns French Road over Slate Bottom Crk?

It is owned by the County Highway Agency.