US Bridges

County Road 1 over Unadilla River

Fair

Otsego County, New York · 0.05 MI E of Rockdale · Structure no. 000000003353660

Built
1989
36 years old
Condition
Fair
inspected July 2023
Type
Box Beam or Girders - Multiple
Prestressed Concrete Continuous
Length
209 ft
2 main spans
Daily traffic
362
2017 count
Owner
County
County Highway Agency

About this bridge

County Road 1 over Unadilla River is a prestressed concrete continuous box beam or girders - multiple carrying County Road 1 over Unadilla River in Otsego County, New York. It was built in 1989, so it is 36 years old, younger 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 362 vehicles a day, roughly 8% of them trucks, projected to reach 507 by 2037. The structure is 209 ft (63.7 m) long and 27 ft wide. If it were closed, the detour would be 5 mi (8 km).

Location

Open in Google Maps
CarriesCounty Road 1
CrossesUnadilla River
Location0.05 MI E of Rockdale
RouteCounty Highway 0
CountyOtsego County
StateNew York
Coordinates42.37873, -75.40641
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.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure8 Very GoodNo problems noted.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionJuly 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation6: Equal to present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating52 US tons
Inventory rating36 US tons

Structure

Structure typeBox Beam or Girders - Multiple
MaterialPrestressed Concrete Continuous
DeckConcrete, cast-in-place
Main spans2
Design loadHS 20
Structure length209 ft (63.7 m)
Longest span102 ft (31 m)
Deck width27 ft (8.1 m)
Roadway width25 ft (7.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic362 (2017)
Projected traffic507 by 2037
Trucks8%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed5 mi (8 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$2.2 million (2024 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was County Road 1 over Unadilla River built?

It was built in 1989, making it 36 years old in 2025.

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 July 2023.

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

About 362 vehicles per day (2017 count), of which roughly 8% are trucks.

How long is County Road 1 over Unadilla River?

The structure is 209 ft (63.7 m) long with a longest span of 102 ft (31 m) and a deck 27 ft wide.

Who owns County Road 1 over Unadilla River?

It is owned by the County Highway Agency.