US Bridges

S.H. 18 over Rock Creek

Fair

Pottawatomie County, Oklahoma · 2.7N JCT SH-3E · Structure no. 271070000000000

Built
2004
21 years old
Condition
Fair
inspected May 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
166 ft
3 main spans
Daily traffic
9,400
2022 count
Owner
State
State Highway Agency

About this bridge

S.H. 18 over Rock Creek is a prestressed concrete stringer/multi-beam or girder carrying S.H. 18 over Rock Creek in Pottawatomie County, Oklahoma. It was built in 2004, so it is 21 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 9,400 vehicles a day, roughly 5% of them trucks, projected to reach 15,040 by 2042. The structure is 166 ft (50.5 m) long and 85 ft wide. If it were closed, the detour would be 19.9 mi (32 km).

Location

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CarriesS.H. 18
CrossesRock Creek
Location2.7N JCT SH-3E
RouteState Highway 18
CountyPottawatomie County
StateOklahoma
Coordinates35.40019, -96.91205
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.
Superstructure8 Very GoodNo problems noted.
Substructure8 Very GoodNo problems noted.
Channel and channel protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionMay 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation8: Equal to present desirable criteria
Deck geometry9: Superior to present desirable criteria
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating70.1 US tons
Inventory rating54.1 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans3
Design loadHL 93
Structure length166 ft (50.5 m)
Longest span55 ft (16.9 m)
Deck width85 ft (25.9 m)
Roadway width82 ft (25 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic9,400 (2022)
Projected traffic15,040 by 2042
Trucks5%
Lanes on structure3
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed19.9 mi (32 km)
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 proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$4.1 million
NavigationNo navigation control on waterway

Frequently asked questions

When was S.H. 18 over Rock Creek built?

It was built in 2004, making it 21 years old in 2025.

What condition is S.H. 18 over Rock 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 S.H. 18 over Rock Creek carry?

About 9,400 vehicles per day (2022 count), of which roughly 5% are trucks.

How long is S.H. 18 over Rock Creek?

The structure is 166 ft (50.5 m) long with a longest span of 55 ft (16.9 m) and a deck 85 ft wide.

Who owns S.H. 18 over Rock Creek?

It is owned by the State Highway Agency.