US Bridges

6138C over Rock Creek

FairPosted for load

Pittsburg County, Oklahoma · 7S 2.7E of Blanco · Structure no. 054530000000000

Built
1937
88 years old
Condition
Fair
inspected August 2023
Type
Stringer/Multi-beam or Girder
Steel
Length
74 ft
3 main spans
Daily traffic
150
2022 count
Owner
County
County Highway Agency

About this bridge

6138C over Rock Creek is a steel stringer/multi-beam or girder carrying 6138C over Rock Creek in Pittsburg County, Oklahoma. It was built in 1937, so it is 88 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 6 out of 9. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound. Its operating status is: posted for load restriction.

It carries about 150 vehicles a day, roughly 15% of them trucks, projected to reach 240 by 2042. The structure is 74 ft (22.6 m) long and 23 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

Location

Open in Google Maps
Carries6138C
CrossesRock Creek
Location7S 2.7E of Blanco
RouteCounty Highway 6138C
CountyPittsburg County
StateOklahoma
Coordinates34.64883, -95.73233
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.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionAugust 2023
Inspection intervalevery 24 months
Operating statusPosted for load restriction
ScourCountermeasures installed to correct a previously existing problem
Structural evaluation4: Meets minimum tolerable limits to be left in place as is
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment5: Somewhat better than minimum adequacy to tolerate being left in place as is
Operating rating27 US tons
Inventory rating16 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans3
Design loadUnknown
Structure length74 ft (22.6 m)
Longest span23 ft (7 m)
Deck width23 ft (6.9 m)
Roadway width20 ft (6.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic150 (2022)
Projected traffic240 by 2042
Trucks15%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.1 mi (5 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCounty Highway Agency
Maintained byCounty Highway Agency
Historic statusHistorical significance not determinable at this time
Work proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$433,000
NavigationNo navigation control on waterway

Frequently asked questions

When was 6138C over Rock Creek built?

It was built in 1937, making it 88 years old in 2025.

What condition is 6138C 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 August 2023.

How much traffic does 6138C over Rock Creek carry?

About 150 vehicles per day (2022 count), of which roughly 15% are trucks.

How long is 6138C over Rock Creek?

The structure is 74 ft (22.6 m) long with a longest span of 23 ft (7 m) and a deck 23 ft wide.

Who owns 6138C over Rock Creek?

It is owned by the County Highway Agency.