US Bridges

RTE I90 over Slippery Rock Creek

Fair

Chautauqua County, New York · 8.5 MI NE of W Field Int · Structure no. 000000005511300

Built
1958
67 years old
Condition
Fair
inspected August 2023
Type
Arch - Deck
Concrete
Length
25 ft
1 main span
Daily traffic
16,888
2020 count
Owner
Toll Authority
State Toll Authority

About this bridge

RTE I90 over Slippery Rock Creek is a concrete arch - deck carrying RTE I90 over Slippery Rock Creek in Chautauqua County, New York. It was built in 1958, so it is 67 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 16,888 vehicles a day, roughly 49% of them trucks, projected to reach 20,113 by 2041. The structure is 25 ft (7.6 m) long and 372 ft wide. If it were closed, the detour would be 2.5 mi (4 km).

Location

Open in Google Maps
CarriesRTE I90
CrossesSlippery Rock Creek
Location8.5 MI NE of W Field Int
RouteInterstate 90
CountyChautauqua County
StateNew York
Coordinates42.40498, -79.44539
Functional classRural Principal Arterial - Interstate

Condition and inspection

Fair

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

ComponentRatingMeaning
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 inspectionAugust 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry7: Better than present minimum criteria
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating85.5 US tons
Inventory rating36 US tons

Structure

Structure typeArch - Deck
MaterialConcrete
DeckNot applicable
Main spans1
Design loadHS 25 or greater
Structure length25 ft (7.6 m)
Longest span23 ft (7 m)
Deck width372 ft (113.4 m)
Roadway width72 ft (21.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic16,888 (2020)
Projected traffic20,113 by 2041
Trucks49%
Lanes on structure4
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed2.5 mi (4 km)
TollOn an Interstate toll segment under Secretarial agreement
National Highway SystemYes
Strategic Highway NetworkInterstate STRAHNET route

Ownership and planned work

OwnerState Toll Authority
Maintained byState Toll Authority
Historic statusHistorical significance not determinable at this time
Work proposedWidening with deck rehabilitation or replacement
Estimated improvement cost$9 million (2024 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was RTE I90 over Slippery Rock Creek built?

It was built in 1958, making it 67 years old in 2025.

What condition is RTE I90 over Slippery Rock 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 August 2023.

How much traffic does RTE I90 over Slippery Rock Creek carry?

About 16,888 vehicles per day (2020 count), of which roughly 49% are trucks.

How long is RTE I90 over Slippery Rock Creek?

The structure is 25 ft (7.6 m) long with a longest span of 23 ft (7 m) and a deck 372 ft wide.

Who owns RTE I90 over Slippery Rock Creek?

It is owned by the State Toll Authority.