US Bridges

S.H. 146 over Cobb Creek

Fair

Caddo County, Oklahoma · 2 MI N JCT SH 9 · Structure no. 187130000000000

Built
1974
51 years old
Condition
Fair
inspected September 2024
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
108 ft
3 main spans
Daily traffic
990
2022 count
Owner
State
State Highway Agency

About this bridge

S.H. 146 over Cobb Creek is a prestressed concrete stringer/multi-beam or girder carrying S.H. 146 over Cobb Creek in Caddo County, Oklahoma. It was built in 1974, so it is 51 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 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 990 vehicles a day, roughly 15% of them trucks, projected to reach 1,584 by 2042. The structure is 108 ft (32.9 m) long and 35 ft wide. If it were closed, the detour would be 34.2 mi (55 km).

Location

Open in Google Maps
CarriesS.H. 146
CrossesCobb Creek
Location2 MI N JCT SH 9
RouteState Highway 146
CountyCaddo County
StateOklahoma
Coordinates35.13756, -98.43021
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
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
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 inspectionSeptember 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating47 US tons
Inventory rating28 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length108 ft (32.9 m)
Longest span35 ft (10.7 m)
Deck width35 ft (10.7 m)
Roadway width32 ft (9.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic990 (2022)
Projected traffic1,584 by 2042
Trucks15%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed34.2 mi (55 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$1.5 million
NavigationNo navigation control on waterway

Frequently asked questions

When was S.H. 146 over Cobb Creek built?

It was built in 1974, making it 51 years old in 2025.

What condition is S.H. 146 over Cobb 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 September 2024.

How much traffic does S.H. 146 over Cobb Creek carry?

About 990 vehicles per day (2022 count), of which roughly 15% are trucks.

How long is S.H. 146 over Cobb Creek?

The structure is 108 ft (32.9 m) long with a longest span of 35 ft (10.7 m) and a deck 35 ft wide.

Who owns S.H. 146 over Cobb Creek?

It is owned by the State Highway Agency.