US Bridges

E0550 over Cow Creek

Fair

Noble County, Oklahoma · 3.7W 4S of I-35 & US77 · Structure no. 079200000000000

Built
1940
85 years old
Condition
Fair
inspected July 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
25 ft
1 main span
Daily traffic
65
2022 count
Owner
County
County Highway Agency

About this bridge

E0550 over Cow Creek is a steel stringer/multi-beam or girder carrying E0550 over Cow Creek in Noble County, Oklahoma. It was built in 1940, so it is 85 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.

It carries about 65 vehicles a day, roughly 10% of them trucks, projected to reach 104 by 2042. The structure is 25 ft (7.6 m) long and 17 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

Open in Google Maps
CarriesE0550
CrossesCow Creek
Location3.7W 4S of I-35 & US77
RouteCounty Highway E0550
CountyNoble County
StateOklahoma
Coordinates36.21716, -97.39377
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
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 geometry3: Basically intolerable, requiring high priority of corrective action
Waterway adequacy5: Somewhat better than minimum adequacy to tolerate being left in place as is
Approach roadway alignment8: Equal to present desirable criteria
Operating rating84 US tons
Inventory rating50 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans1
Design loadH 20
Structure length25 ft (7.6 m)
Longest span24 ft (7.3 m)
Deck width17 ft (5.2 m)
Roadway width17 ft (5.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic65 (2022)
Projected traffic104 by 2042
Trucks10%
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$241,000
NavigationNo navigation control on waterway

Frequently asked questions

When was E0550 over Cow Creek built?

It was built in 1940, making it 85 years old in 2025.

What condition is E0550 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 July 2024.

How much traffic does E0550 over Cow Creek carry?

About 65 vehicles per day (2022 count), of which roughly 10% are trucks.

How long is E0550 over Cow Creek?

The structure is 25 ft (7.6 m) long with a longest span of 24 ft (7.3 m) and a deck 17 ft wide.

Who owns E0550 over Cow Creek?

It is owned by the County Highway Agency.