US Bridges

RTE I90 over Main ST Extension CSX

Fair

Chautauqua County, New York · 1.0 MI W of Dunkirk Int · Structure no. 000000005511342

Built
1955
70 years old
Condition
Fair
inspected November 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
217 ft
4 main spans
Daily traffic
8,444
2020 count
Owner
Toll Authority
State Toll Authority

About this bridge

RTE I90 over Main ST Extension CSX is a steel stringer/multi-beam or girder carrying RTE I90 over Main ST Extension CSX in Chautauqua County, New York. It was built in 1955, so it is 70 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 8,444 vehicles a day, roughly 49% of them trucks, projected to reach 9,463 by 2041. The structure is 217 ft (66.1 m) long and 56 ft wide.

Location

Open in Google Maps
CarriesRTE I90
CrossesMain ST Extension CSX
Location1.0 MI W of Dunkirk Int
RouteInterstate 90
CountyChautauqua County
StateNew York
Coordinates42.45966, -79.32448
Functional classUrban 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
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
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.
Last inspectionNovember 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating65 US tons
Inventory rating39 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans4
Design loadHS 25 or greater
Structure length217 ft (66.1 m)
Longest span64 ft (19.5 m)
Deck width56 ft (17.1 m)
Roadway width52 ft (16 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic8,444 (2020)
Projected traffic9,463 by 2041
Trucks49%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway
CrossesHighway and railroad
Detour if closed—
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$7.8 million (2024 estimate)
NavigationNot applicable (no waterway)

Frequently asked questions

When was RTE I90 over Main ST Extension CSX built?

It was built in 1955, making it 70 years old in 2025.

What condition is RTE I90 over Main ST Extension CSX 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 November 2024.

How much traffic does RTE I90 over Main ST Extension CSX carry?

About 8,444 vehicles per day (2020 count), of which roughly 49% are trucks.

How long is RTE I90 over Main ST Extension CSX?

The structure is 217 ft (66.1 m) long with a longest span of 64 ft (19.5 m) and a deck 56 ft wide.

Who owns RTE I90 over Main ST Extension CSX?

It is owned by the State Toll Authority.