US Bridges

E0520 over Cow Creek

Fair

Noble County, Oklahoma · 1.1E 1S I35/US77 · Structure no. 039530000000000

Built
1933
92 years old
Condition
Fair
inspected July 2023
Type
Slab
Concrete
Length
40 ft
1 main span
Daily traffic
25
2022 count
Owner
County
County Highway Agency

About this bridge

E0520 over Cow Creek is a concrete slab carrying E0520 over Cow Creek in Noble County, Oklahoma. It was built in 1933, so it is 92 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 25 vehicles a day, roughly 10% of them trucks, projected to reach 40 by 2042. The structure is 40 ft (12.2 m) long and 20 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

Open in Google Maps
CarriesE0520
CrossesCow Creek
Location1.1E 1S I35/US77
RouteCounty Highway E0520
CountyNoble County
StateOklahoma
Coordinates36.26064, -97.30693
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.
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 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
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 rating36 US tons
Inventory rating21.1 US tons

Structure

Structure typeSlab
MaterialConcrete
DeckConcrete, cast-in-place
Main spans1
Design loadUnknown
Structure length40 ft (12.2 m)
Longest span38 ft (11.7 m)
Deck width20 ft (6.2 m)
Roadway width16 ft (5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic25 (2022)
Projected traffic40 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$311,000
NavigationNo navigation control on waterway

Frequently asked questions

When was E0520 over Cow Creek built?

It was built in 1933, making it 92 years old in 2025.

What condition is E0520 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 2023.

How much traffic does E0520 over Cow Creek carry?

About 25 vehicles per day (2022 count), of which roughly 10% are trucks.

How long is E0520 over Cow Creek?

The structure is 40 ft (12.2 m) long with a longest span of 38 ft (11.7 m) and a deck 20 ft wide.

Who owns E0520 over Cow Creek?

It is owned by the County Highway Agency.