US Bridges

RTE 305 over Oswayo Stream

Fair

Cattaraugus County, New York · JCT RTE 305 + Oswayo CR · Structure no. 000000001045430

Built
1964
61 years old
Condition
Fair
inspected November 2023
Type
Stringer/Multi-beam or Girder
Steel
Length
265 ft
3 main spans
Daily traffic
3,040
2020 count
Owner
State
State Highway Agency

About this bridge

RTE 305 over Oswayo Stream is a steel stringer/multi-beam or girder carrying RTE 305 over Oswayo Stream in Cattaraugus County, New York. It was built in 1964, so it is 61 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 3,040 vehicles a day, roughly 10% of them trucks, projected to reach 3,206 by 2041. The structure is 265 ft (80.8 m) long and 33 ft wide. If it were closed, the detour would be 20.5 mi (33 km).

Location

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CarriesRTE 305
CrossesOswayo Stream
LocationJCT RTE 305 + Oswayo CR
RouteState Highway 305
CountyCattaraugus County
StateNew York
Coordinates42.02347, -78.33862
Functional classRural 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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure7 GoodSome minor problems.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionNovember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry4: Meets minimum tolerable limits to be 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 rating85 US tons
Inventory rating51 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length265 ft (80.8 m)
Longest span85 ft (25.9 m)
Deck width33 ft (10.1 m)
Roadway width28 ft (8.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic3,040 (2020)
Projected traffic3,206 by 2041
Trucks10%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed20.5 mi (33 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$6 million (2024 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was RTE 305 over Oswayo Stream built?

It was built in 1964, making it 61 years old in 2025.

What condition is RTE 305 over Oswayo Stream 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 2023.

How much traffic does RTE 305 over Oswayo Stream carry?

About 3,040 vehicles per day (2020 count), of which roughly 10% are trucks.

How long is RTE 305 over Oswayo Stream?

The structure is 265 ft (80.8 m) long with a longest span of 85 ft (25.9 m) and a deck 33 ft wide.

Who owns RTE 305 over Oswayo Stream?

It is owned by the State Highway Agency.