US Bridges

S.H. 18 over Rock Creek

Good

Pottawatomie County, Oklahoma · 5.2 MI N JCT SH 3E · Structure no. 048710000000000

Built
1936
89 years old, rebuilt 2004
Condition
Good
inspected May 2023
Type
Culvert
Concrete
Length
34 ft
3 main spans
Daily traffic
8,000
2022 count
Owner
State
State Highway Agency

About this bridge

S.H. 18 over Rock Creek is a concrete culvert carrying S.H. 18 over Rock Creek in Pottawatomie County, Oklahoma. It was built in 1936 and reconstructed in 2004, so it is 89 years old, older than the Oklahoma average of 47.8 years.

The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 8,000 vehicles a day, roughly 7% of them trucks, projected to reach 12,800 by 2042. The structure is 34 ft (10.4 m) long and 128 ft wide. If it were closed, the detour would be 19.9 mi (32 km).

CarriesS.H. 18
CrossesRock Creek
Location5.2 MI N JCT SH 3E
RouteState Highway 18
Coordinates35.43524, -96.9118
Functional classUrban Collector

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Channel and channel protection7 GoodSome minor problems.
Culvert7 GoodSome minor problems.
Last inspectionMay 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry9: Superior to present desirable criteria
Waterway adequacy5: Somewhat better than minimum adequacy to tolerate being left in place as is
Approach roadway alignment8: Equal to present desirable criteria
Operating rating45.3 US tons
Inventory rating27.1 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckNot applicable
Main spans3
Design loadH 20
Structure length34 ft (10.4 m)
Longest span10 ft (3 m)
Deck width128 ft (39 m)
Roadway width84 ft (25.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic8,000 (2022)
Projected traffic12,800 by 2042
Trucks7%
Lanes on structure4
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 statusHistorical significance not determinable at this time
Work proposedWidening of existing bridge without deck rehabilitation
Estimated improvement cost$644,000
NavigationNo navigation control on waterway

Frequently asked questions

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

It was built in 1936, making it 89 years old in 2025. It was reconstructed in 2004.

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

The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in May 2023.

How much traffic does S.H. 18 over Rock Creek carry?

About 8,000 vehicles per day (2022 count), of which roughly 7% are trucks.

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

The structure is 34 ft (10.4 m) long with a longest span of 10 ft (3 m) and a deck 128 ft wide.

Who owns S.H. 18 over Rock Creek?

It is owned by the State Highway Agency.