US Bridges

N3520 over Sand Creek

Fair

Johnston County, Oklahoma · .2 N & .6 E of Ravia · Structure no. 271930000000000

Built
2002
23 years old
Condition
Fair
inspected May 2023
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
61 ft
2 main spans
Daily traffic
100
2022 count
Owner
County
County Highway Agency

About this bridge

N3520 over Sand Creek is a steel continuous stringer/multi-beam or girder carrying N3520 over Sand Creek in Johnston County, Oklahoma. It was built in 2002, so it is 23 years old, younger 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 100 vehicles a day, roughly 10% of them trucks, projected to reach 160 by 2042. The structure is 61 ft (18.5 m) long and 20 ft wide. If it were closed, the detour would be 123 mi (198 km).

Location

Open in Google Maps
CarriesN3520
CrossesSand Creek
Location.2 N & .6 E of Ravia
RouteCounty Highway N3520
CountyJohnston County
StateOklahoma
Coordinates34.24309, -96.74094
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.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
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 inspectionMay 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 geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy5: Somewhat better than minimum adequacy to tolerate being left in place as is
Approach roadway alignment8: Equal to present desirable criteria
Operating rating61.9 US tons
Inventory rating37 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans2
Design loadHS 20
Structure length61 ft (18.5 m)
Longest span30 ft (9.1 m)
Deck width20 ft (6 m)
Roadway width18 ft (5.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic100 (2022)
Projected traffic160 by 2042
Trucks10%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed123 mi (198 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 N3520 over Sand Creek built?

It was built in 2002, making it 23 years old in 2025.

What condition is N3520 over Sand 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 May 2023.

How much traffic does N3520 over Sand Creek carry?

About 100 vehicles per day (2022 count), of which roughly 10% are trucks.

How long is N3520 over Sand Creek?

The structure is 61 ft (18.5 m) long with a longest span of 30 ft (9.1 m) and a deck 20 ft wide.

Who owns N3520 over Sand Creek?

It is owned by the County Highway Agency.