US Bridges

IRR 5806C (N4620) over Creek

Fair

Ottawa County, Oklahoma · 2.5E 1N of Quapaw · Structure no. 280290000000000

Built
1970
55 years old
Condition
Fair
inspected September 2023
Type
Culvert
Concrete
Length
31 ft
3 main spans
Daily traffic
200
2022 count
Owner
County
County Highway Agency

About this bridge

IRR 5806C (N4620) over Creek is a concrete culvert carrying IRR 5806C (N4620) over Creek in Ottawa County, Oklahoma. It was built in 1970, so it is 55 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 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 200 vehicles a day, roughly 15% of them trucks, projected to reach 320 by 2042. The structure is 31 ft (9.6 m) long and 42 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

Location

Open in Google Maps
CarriesIRR 5806C (N4620)
CrossesCreek
Location2.5E 1N of Quapaw
RouteCounty Highway N4620
CountyOttawa County
StateOklahoma
Coordinates36.97976, -94.74052
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
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Culvert6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionSeptember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry9: Superior to present desirable criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating47 US tons
Inventory rating28.1 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length31 ft (9.6 m)
Longest span10 ft (3 m)
Deck width42 ft (12.8 m)
Roadway width40 ft (12.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic200 (2022)
Projected traffic320 by 2042
Trucks15%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.7 mi (6 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$1.2 million
NavigationNo navigation control on waterway

Frequently asked questions

When was IRR 5806C (N4620) over Creek built?

It was built in 1970, making it 55 years old in 2025.

What condition is IRR 5806C (N4620) over 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 September 2023.

How much traffic does IRR 5806C (N4620) over Creek carry?

About 200 vehicles per day (2022 count), of which roughly 15% are trucks.

How long is IRR 5806C (N4620) over Creek?

The structure is 31 ft (9.6 m) long with a longest span of 10 ft (3 m) and a deck 42 ft wide.

Who owns IRR 5806C (N4620) over Creek?

It is owned by the County Highway Agency.