US Bridges

N3290 over Walnut Creek

Fair

Logan County, Oklahoma · .1W 5.N of Merrick · Structure no. 227930000000000

Built
1991
34 years old
Condition
Fair
inspected July 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
60 ft
1 main span
Daily traffic
250
2022 count
Owner
County
County Highway Agency

About this bridge

N3290 over Walnut Creek is a steel stringer/multi-beam or girder carrying N3290 over Walnut Creek in Logan County, Oklahoma. It was built in 1991, so it is 34 years old, younger than the Oklahoma average of 47.8 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 250 vehicles a day, roughly 15% of them trucks, projected to reach 400 by 2042. The structure is 60 ft (18.3 m) long and 25 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

Open in Google Maps
CarriesN3290
CrossesWalnut Creek
Location.1W 5.N of Merrick
RouteCounty Highway N3290
CountyLogan County
StateOklahoma
Coordinates35.92959, -97.14056
Functional classRural Major 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.
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 inspectionJuly 2024
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 adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating74 US tons
Inventory rating44 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20
Structure length60 ft (18.3 m)
Longest span59 ft (18 m)
Deck width25 ft (7.6 m)
Roadway width24 ft (7.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic250 (2022)
Projected traffic400 by 2042
Trucks15%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.9 mi (3 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 proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$387,000
NavigationNo navigation control on waterway

Frequently asked questions

When was N3290 over Walnut Creek built?

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

What condition is N3290 over Walnut 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 July 2024.

How much traffic does N3290 over Walnut Creek carry?

About 250 vehicles per day (2022 count), of which roughly 15% are trucks.

How long is N3290 over Walnut Creek?

The structure is 60 ft (18.3 m) long with a longest span of 59 ft (18 m) and a deck 25 ft wide.

Who owns N3290 over Walnut Creek?

It is owned by the County Highway Agency.