US Bridges

N4690 over Onion Creek

FairPosted for load

Sequoyah County, Oklahoma · 1.2 S 1.1 E of Gans · Structure no. 096850000000000

Built
1941
84 years old
Condition
Fair
inspected June 2023
Type
Stringer/Multi-beam or Girder
Concrete
Length
32 ft
1 main span
Daily traffic
100
2022 count
Owner
County
County Highway Agency

About this bridge

N4690 over Onion Creek is a concrete stringer/multi-beam or girder carrying N4690 over Onion Creek in Sequoyah County, Oklahoma. It was built in 1941, so it is 84 years old, older 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. Its operating status is: posted for load restriction.

It carries about 100 vehicles a day, roughly 10% of them trucks, projected to reach 160 by 2042. The structure is 32 ft (9.8 m) long and 23 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

Location

Open in Google Maps
CarriesN4690
CrossesOnion Creek
Location1.2 S 1.1 E of Gans
RouteCounty Highway N4690
CountySequoyah County
StateOklahoma
Coordinates35.37208, -94.67297
Functional classRural Local

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection7 GoodSome minor problems.
Last inspectionJune 2023
Inspection intervalevery 24 months
Operating statusPosted for load restriction
ScourFoundations stable; scour within limits of footing or piles
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 adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating32.5 US tons
Inventory rating19.7 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialConcrete
DeckConcrete, cast-in-place
Main spans1
Design loadHL 93
Structure length32 ft (9.8 m)
Longest span27 ft (8.2 m)
Deck width23 ft (7 m)
Roadway width20 ft (6.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic100 (2022)
Projected traffic160 by 2042
Trucks10%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.1 mi (5 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$276,000
NavigationNo navigation control on waterway

Frequently asked questions

When was N4690 over Onion Creek built?

It was built in 1941, making it 84 years old in 2025.

What condition is N4690 over Onion 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 June 2023.

How much traffic does N4690 over Onion Creek carry?

About 100 vehicles per day (2022 count), of which roughly 10% are trucks.

How long is N4690 over Onion Creek?

The structure is 32 ft (9.8 m) long with a longest span of 27 ft (8.2 m) and a deck 23 ft wide.

Who owns N4690 over Onion Creek?

It is owned by the County Highway Agency.