US Bridges

RTE 20 over Walnut Creek

Good

Chautauqua County, New York · 2.1 Mile NE JCT Rt 20&I90 · Structure no. 000000001015420

Built
1991
34 years old
Condition
Good
inspected August 2023
Type
Box Beam or Girders - Multiple
Prestressed Concrete
Length
95 ft
1 main span
Daily traffic
4,579
2020 count
Owner
State
State Highway Agency

About this bridge

RTE 20 over Walnut Creek is a prestressed concrete box beam or girders - multiple carrying RTE 20 over Walnut Creek in Chautauqua County, New York. It was built in 1991, so it is 34 years old, younger than the New York average of 53 years.

The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 4,579 vehicles a day, roughly 6% of them trucks, projected to reach 4,622 by 2041. The structure is 95 ft (29 m) long and 50 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

CarriesRTE 20
CrossesWalnut Creek
Location2.1 Mile NE JCT Rt 20&I90
RouteU.S. Route 20
Coordinates42.53823, -79.16914
Functional classRural Principal Arterial - Other

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure8 Very GoodNo problems noted.
Substructure8 Very GoodNo problems noted.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionAugust 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation8: Equal to present desirable criteria
Deck geometry6: Equal to present minimum 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 rating99 US tons
Inventory rating48 US tons

Structure

MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20
Structure length95 ft (29 m)
Longest span91 ft (27.7 m)
Deck width50 ft (15.3 m)
Roadway width40 ft (12.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic4,579 (2020)
Projected traffic4,622 by 2041
Trucks6%
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 Walnut Creek built?

It was built in 1991, making it 34 years old in 2025.

What condition is RTE 20 over Walnut Creek in?

The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in August 2023.

How much traffic does RTE 20 over Walnut Creek carry?

About 4,579 vehicles per day (2020 count), of which roughly 6% are trucks.

How long is RTE 20 over Walnut Creek?

The structure is 95 ft (29 m) long with a longest span of 91 ft (27.7 m) and a deck 50 ft wide.

Who owns RTE 20 over Walnut Creek?

It is owned by the State Highway Agency.