US Bridges

6646C over Inola Creek

Fair

Rogers County, Oklahoma · 3.3 MI S of US 412 · Structure no. 178150000000000

Built
1970
55 years old
Condition
Fair
inspected July 2023
Type
Culvert
Concrete
Length
53 ft
5 main spans
Daily traffic
100
2022 count
Owner
County
County Highway Agency

About this bridge

6646C over Inola Creek is a concrete culvert carrying 6646C over Inola Creek in Rogers 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 100 vehicles a day, roughly 15% of them trucks, projected to reach 160 by 2042. The structure is 53 ft (16.2 m) long. If it were closed, the detour would be 3.7 mi (6 km).

Location

Open in Google Maps
Carries6646C
CrossesInola Creek
Location3.3 MI S of US 412
RouteCounty Highway 6646C
CountyRogers County
StateOklahoma
Coordinates36.12134, -95.53042
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 protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Culvert6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionJuly 2023
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
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating36 US tons
Inventory rating21.6 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckNot applicable
Main spans5
Design loadHS 20
Structure length53 ft (16.2 m)
Longest span10 ft (3 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic100 (2022)
Projected traffic160 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 proposedWidening of existing bridge without deck rehabilitation
Estimated improvement cost$225,000
NavigationNo navigation control on waterway

Frequently asked questions

When was 6646C over Inola Creek built?

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

What condition is 6646C over Inola 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 2023.

How much traffic does 6646C over Inola Creek carry?

About 100 vehicles per day (2022 count), of which roughly 15% are trucks.

How long is 6646C over Inola Creek?

The structure is 53 ft (16.2 m) long with a longest span of 10 ft (3 m).

Who owns 6646C over Inola Creek?

It is owned by the County Highway Agency.