US Bridges

S.H. 99 over Unnamed Creek

Fair

Osage County, Oklahoma · 2 S of JCT S.H. 11 · Structure no. 303160000000000

Built
2019
6 years old
Condition
Fair
inspected August 2023
Type
Culvert
Concrete
Length
32 ft
3 main spans
Daily traffic
2,200
2022 count
Owner
State
State Highway Agency

About this bridge

S.H. 99 over Unnamed Creek is a concrete culvert carrying S.H. 99 over Unnamed Creek in Osage County, Oklahoma. It was built in 2019, so it is 6 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 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 2,200 vehicles a day, roughly 11% of them trucks, projected to reach 3,100 by 2042. The structure is 32 ft (9.8 m) long.

Location

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CarriesS.H. 99
CrossesUnnamed Creek
Location2 S of JCT S.H. 11
RouteState Highway 99
CountyOsage County
StateOklahoma
Coordinates36.56611, -96.31556
Functional classRural Minor Arterial

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 protection6 SatisfactoryStructural elements show some minor deterioration.
Culvert6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionAugust 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourCountermeasures installed to correct a previously existing problem
Structural evaluation6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating110.1 US tons
Inventory rating110.1 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckNot applicable
Main spans3
Design loadHL 93
Structure length32 ft (9.8 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 traffic2,200 (2022)
Projected traffic3,100 by 2042
Trucks11%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed—
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedNone recorded
Estimated improvement cost—
NavigationNot applicable (no waterway)

Frequently asked questions

When was S.H. 99 over Unnamed Creek built?

It was built in 2019, making it 6 years old in 2025.

What condition is S.H. 99 over Unnamed 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 August 2023.

How much traffic does S.H. 99 over Unnamed Creek carry?

About 2,200 vehicles per day (2022 count), of which roughly 11% are trucks.

How long is S.H. 99 over Unnamed Creek?

The structure is 32 ft (9.8 m) long with a longest span of 10 ft (3 m).

Who owns S.H. 99 over Unnamed Creek?

It is owned by the State Highway Agency.