US Bridges

RTE 430 over Big Inlet

Fair

Chautauqua County, New York · 1.8 MI NE JCT Rts 17 +430 · Structure no. 000000001012030

Built
1938
87 years old, rebuilt 1992
Condition
Fair
inspected August 2024
Type
Girder and Floorbeam System
Steel
Length
65 ft
1 main span
Daily traffic
3,602
2017 count
Owner
State
State Highway Agency

About this bridge

RTE 430 over Big Inlet is a steel girder and floorbeam system carrying RTE 430 over Big Inlet in Chautauqua County, New York. It was built in 1938 and reconstructed in 1992, so it is 87 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 3,602 vehicles a day, roughly 6% of them trucks, projected to reach 3,638 by 2041. The structure is 65 ft (19.8 m) long and 37 ft wide. If it were closed, the detour would be 0.6 mi (1 km).

Location

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CarriesRTE 430
CrossesBig Inlet
Location1.8 MI NE JCT Rts 17 +430
RouteState Highway 430
CountyChautauqua County
StateNew York
Coordinates42.26553, -79.47581
Functional classRural Major Collector

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.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionAugust 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy5: Somewhat better than minimum adequacy to tolerate being left in place as is
Approach roadway alignment8: Equal to present desirable criteria
Operating rating58 US tons
Inventory rating23 US tons

Structure

Structure typeGirder and Floorbeam System
MaterialSteel
DeckConcrete, cast-in-place
Main spans1
Design loadOther
Structure length65 ft (19.8 m)
Longest span60 ft (18.2 m)
Deck width37 ft (11.4 m)
Roadway width34 ft (10.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic3,602 (2017)
Projected traffic3,638 by 2041
Trucks6%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed0.6 mi (1 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedWidening with deck rehabilitation or replacement
Estimated improvement cost$2.7 million (2024 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was RTE 430 over Big Inlet built?

It was built in 1938, making it 87 years old in 2025. It was reconstructed in 1992.

What condition is RTE 430 over Big Inlet 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 2024.

How much traffic does RTE 430 over Big Inlet carry?

About 3,602 vehicles per day (2017 count), of which roughly 6% are trucks.

How long is RTE 430 over Big Inlet?

The structure is 65 ft (19.8 m) long with a longest span of 60 ft (18.2 m) and a deck 37 ft wide.

Who owns RTE 430 over Big Inlet?

It is owned by the State Highway Agency.