US Bridges

County Road 1 over Unadilla River

Fair

Otsego County, New York · .5 MI E of East Guilford · Structure no. 000000003353650

Built
1935
90 years old, rebuilt 1995
Condition
Fair
inspected May 2023
Type
Truss - Thru
Steel
Length
178 ft
1 main span
Daily traffic
1,011
2019 count
Owner
County
County Highway Agency

About this bridge

County Road 1 over Unadilla River is a steel truss - thru carrying County Road 1 over Unadilla River in Otsego County, New York. It was built in 1935 and reconstructed in 1995, so it is 90 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 1,011 vehicles a day, roughly 7% of them trucks, projected to reach 1,415 by 2039. The structure is 178 ft (54.3 m) long and 31 ft wide. If it were closed, the detour would be 6.8 mi (11 km).

Location

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CarriesCounty Road 1
CrossesUnadilla River
Location.5 MI E of East Guilford
RouteCounty Highway 0
CountyOtsego County
StateNew York
Coordinates42.34113, -75.39848
Functional classRural Minor 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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionMay 2023
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 geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy4: Meets minimum tolerable limits to be left in place as is
Approach roadway alignment8: Equal to present desirable criteria
Operating rating49.1 US tons
Inventory rating30 US tons

Structure

Structure typeTruss - Thru
MaterialSteel
DeckConcrete, cast-in-place
Main spans1
Design loadUnknown
Structure length178 ft (54.3 m)
Longest span175 ft (53.3 m)
Deck width31 ft (9.6 m)
Roadway width29 ft (8.8 m)
Vertical clearance over deck15 ft (4.5 m)

Traffic and service

Average daily traffic1,011 (2019)
Projected traffic1,415 by 2039
Trucks7%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed6.8 mi (11 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCounty Highway Agency
Maintained byCounty Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedWidening with deck rehabilitation or replacement
Estimated improvement cost$7.9 million (2024 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was County Road 1 over Unadilla River built?

It was built in 1935, making it 90 years old in 2025. It was reconstructed in 1995.

What condition is County Road 1 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 2023.

How much traffic does County Road 1 over Unadilla River carry?

About 1,011 vehicles per day (2019 count), of which roughly 7% are trucks.

How long is County Road 1 over Unadilla River?

The structure is 178 ft (54.3 m) long with a longest span of 175 ft (53.3 m) and a deck 31 ft wide.

Who owns County Road 1 over Unadilla River?

It is owned by the County Highway Agency.