US Bridges

RTE 20 over W Br Unadilla River

Poor

Oneida County, New York · .4 MI E JCT US 20 & SH 8 · Structure no. 000000001015830

Built
1980
45 years old
Condition
Poor
inspected August 2023
Type
Box Beam or Girders - Multiple
Prestressed Concrete
Length
84 ft
1 main span
Daily traffic
2,759
2021 count
Owner
State
State Highway Agency

About this bridge

RTE 20 over W Br Unadilla River is a prestressed concrete box beam or girders - multiple carrying RTE 20 over W Br Unadilla River in Oneida County, New York. It was built in 1980, so it is 45 years old, younger than the New York average of 53 years.

The most recent inspection reported to the Federal Highway Administration rates it in poor condition with a lowest component rating of 4 out of 9. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.

It carries about 2,759 vehicles a day, roughly 14% of them trucks, projected to reach 2,975 by 2041. The structure is 84 ft (25.6 m) long and 51 ft wide. If it were closed, the detour would be 39.8 mi (64 km).

CarriesRTE 20
CrossesW Br Unadilla River
Location.4 MI E JCT US 20 & SH 8
RouteU.S. Route 20
Coordinates42.87815, -75.24284
Functional classRural Principal Arterial - Other

Condition and inspection

Poor

The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.

ComponentRatingMeaning
Deck4 PoorAdvanced section loss, deterioration, spalling or scour.
Superstructure4 PoorAdvanced section loss, deterioration, 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 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation4: Meets minimum tolerable limits to be left in place as is
Deck geometry9: Superior to present desirable criteria
Waterway adequacy5: Somewhat better than minimum adequacy to tolerate being left in place as is
Approach roadway alignment8: Equal to present desirable criteria
Operating rating72 US tons
Inventory rating44 US tons

Structure

MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20
Structure length84 ft (25.6 m)
Longest span80 ft (24.3 m)
Deck width51 ft (15.4 m)
Roadway width48 ft (14.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic2,759 (2021)
Projected traffic2,975 by 2041
Trucks14%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed39.8 mi (64 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 proposedWidening with deck rehabilitation or replacement
Estimated improvement cost$1.7 million (2024 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was RTE 20 over W Br Unadilla River built?

It was built in 1980, making it 45 years old in 2025.

What condition is RTE 20 over W Br Unadilla River in?

The National Bridge Inventory rates it in poor condition. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. The last reported inspection was in August 2023.

How much traffic does RTE 20 over W Br Unadilla River carry?

About 2,759 vehicles per day (2021 count), of which roughly 14% are trucks.

How long is RTE 20 over W Br Unadilla River?

The structure is 84 ft (25.6 m) long with a longest span of 80 ft (24.3 m) and a deck 51 ft wide.

Who owns RTE 20 over W Br Unadilla River?

It is owned by the State Highway Agency.