US Bridges

RTE 23 over Unadilla River

Fair

Chenango County, New York · JCT RTE 23 + Unadilla R · Structure no. 000000001017530

Built
1949
76 years old
Condition
Fair
inspected May 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
201 ft
3 main spans
Daily traffic
1,403
2020 count
Owner
State
State Highway Agency

About this bridge

RTE 23 over Unadilla River is a steel stringer/multi-beam or girder carrying RTE 23 over Unadilla River in Chenango County, New York. It was built in 1949, so it is 76 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 1,403 vehicles a day, roughly 11% of them trucks, projected to reach 1,416 by 2041. The structure is 201 ft (61.3 m) long and 33 ft wide. If it were closed, the detour would be 15.5 mi (25 km).

Location

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CarriesRTE 23
CrossesUnadilla River
LocationJCT RTE 23 + Unadilla R
RouteState Highway 23
CountyChenango County
StateNew York
Coordinates42.52879, -75.38229
Functional classRural Principal Arterial - Other

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 inspectionMay 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 geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating47 US tons
Inventory rating28 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans3
Design loadH 20
Structure length201 ft (61.3 m)
Longest span65 ft (19.8 m)
Deck width33 ft (10.1 m)
Roadway width26 ft (7.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,403 (2020)
Projected traffic1,416 by 2041
Trucks11%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed15.5 mi (25 km)
TollOn a free road
National Highway SystemYes

Ownership and planned work

OwnerState Highway Agency
Maintained byState 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 RTE 23 over Unadilla River built?

It was built in 1949, making it 76 years old in 2025.

What condition is RTE 23 over Unadilla River 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 May 2024.

How much traffic does RTE 23 over Unadilla River carry?

About 1,403 vehicles per day (2020 count), of which roughly 11% are trucks.

How long is RTE 23 over Unadilla River?

The structure is 201 ft (61.3 m) long with a longest span of 65 ft (19.8 m) and a deck 33 ft wide.

Who owns RTE 23 over Unadilla River?

It is owned by the State Highway Agency.