US Bridges

RTE 20 over Silver Creek

Fair

Chautauqua County, New York · 2.6 MI NE JCT Rt 20 + I90 · Structure no. 000000001015430

Built
1915
110 years old, rebuilt 1990
Condition
Fair
inspected May 2024
Type
Box Beam or Girders - Multiple
Prestressed Concrete
Length
67 ft
1 main span
Daily traffic
5,683
2021 count
Owner
State
State Highway Agency

About this bridge

RTE 20 over Silver Creek is a prestressed concrete box beam or girders - multiple carrying RTE 20 over Silver Creek in Chautauqua County, New York. It was built in 1915 and reconstructed in 1990, so it is 110 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 5,683 vehicles a day, roughly 4% of them trucks, projected to reach 5,736 by 2041. The structure is 67 ft (20.4 m) long and 54 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

CarriesRTE 20
CrossesSilver Creek
Location2.6 MI NE JCT Rt 20 + I90
RouteU.S. Route 20
Coordinates42.54385, -79.16474
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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure7 GoodSome minor problems.
Channel and channel protection7 GoodSome minor problems.
Last inspectionMay 2024
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 adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating75.9 US tons
Inventory rating36 US tons

Structure

MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20
Structure length67 ft (20.4 m)
Longest span66 ft (20.1 m)
Deck width54 ft (16.5 m)
Roadway width40 ft (12.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic5,683 (2021)
Projected traffic5,736 by 2041
Trucks4%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed1.9 mi (3 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$2.5 million (2024 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was RTE 20 over Silver Creek built?

It was built in 1915, making it 110 years old in 2025. It was reconstructed in 1990.

What condition is RTE 20 over Silver Creek 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 20 over Silver Creek carry?

About 5,683 vehicles per day (2021 count), of which roughly 4% are trucks.

How long is RTE 20 over Silver Creek?

The structure is 67 ft (20.4 m) long with a longest span of 66 ft (20.1 m) and a deck 54 ft wide.

Who owns RTE 20 over Silver Creek?

It is owned by the State Highway Agency.