US Bridges

6920C over Cow Creek

FairPosted for load

Stephens County, Oklahoma · 15.7 MI W of Velma · Structure no. 017190000000000

Built
1926
99 years old
Condition
Fair
inspected June 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
42 ft
1 main span
Daily traffic
904
2022 count
Owner
County
County Highway Agency

About this bridge

6920C over Cow Creek is a steel stringer/multi-beam or girder carrying 6920C over Cow Creek in Stephens County, Oklahoma. It was built in 1926, so it is 99 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 904 vehicles a day, roughly 15% of them trucks, projected to reach 1,446 by 2042. The structure is 42 ft (12.8 m) long and 23 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

Carries6920C
CrossesCow Creek
Location15.7 MI W of Velma
RouteCounty Highway 6911
Coordinates34.49259, -97.91996
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.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionJune 2024
Inspection intervalevery 24 months
Operating statusPosted for load restriction
ScourFoundations stable; scour above top of footing
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry3: Basically intolerable, requiring high priority of corrective action
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating39.2 US tons
Inventory rating23.5 US tons

Structure

MaterialSteel
DeckConcrete, cast-in-place
Main spans1
Design loadH 20
Structure length42 ft (12.8 m)
Longest span42 ft (12.8 m)
Deck width23 ft (7 m)
Roadway width20 ft (6.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic904 (2022)
Projected traffic1,446 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 statusHistorical significance not determinable at this time
Work proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$319,000
NavigationNo navigation control on waterway

Frequently asked questions

When was 6920C over Cow Creek built?

It was built in 1926, making it 99 years old in 2025.

What condition is 6920C over Cow 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 2024.

How much traffic does 6920C over Cow Creek carry?

About 904 vehicles per day (2022 count), of which roughly 15% are trucks.

How long is 6920C over Cow Creek?

The structure is 42 ft (12.8 m) long with a longest span of 42 ft (12.8 m) and a deck 23 ft wide.

Who owns 6920C over Cow Creek?

It is owned by the County Highway Agency.