US Bridges

E1150 over Cobb Creek

Good

Washita County, Oklahoma · .4E of Colony · Structure no. 294490000000000

Built
2009
16 years old
Condition
Good
inspected January 2023
Type
Stringer/Multi-beam or Girder
Steel
Length
120 ft
3 main spans
Daily traffic
212
2022 count
Owner
County
County Highway Agency

About this bridge

E1150 over Cobb Creek is a steel stringer/multi-beam or girder carrying E1150 over Cobb Creek in Washita County, Oklahoma. It was built in 2009, so it is 16 years old, younger 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 212 vehicles a day, roughly 15% of them trucks, projected to reach 339 by 2042. The structure is 120 ft (36.6 m) long and 27 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

Location

Open in Google Maps
CarriesE1150
CrossesCobb Creek
Location.4E of Colony
RouteCounty Highway E1150
CountyWashita County
StateOklahoma
Coordinates35.34867, -98.66934
Functional classRural Major Collector

Condition and inspection

Good

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

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure8 Very GoodNo problems noted.
Substructure8 Very GoodNo problems noted.
Channel and channel protection7 GoodSome minor problems.
Last inspectionJanuary 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating50 US tons
Inventory rating30 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans3
Design loadUnknown
Structure length120 ft (36.6 m)
Longest span59 ft (18 m)
Deck width27 ft (8.3 m)
Roadway width26 ft (7.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic212 (2022)
Projected traffic339 by 2042
Trucks15%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.7 mi (6 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCounty Highway Agency
Maintained byCounty Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedNone recorded
Estimated improvement cost$682,000
NavigationNo navigation control on waterway

Frequently asked questions

When was E1150 over Cobb Creek built?

It was built in 2009, making it 16 years old in 2025.

What condition is E1150 over Cobb 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 January 2023.

How much traffic does E1150 over Cobb Creek carry?

About 212 vehicles per day (2022 count), of which roughly 15% are trucks.

How long is E1150 over Cobb Creek?

The structure is 120 ft (36.6 m) long with a longest span of 59 ft (18 m) and a deck 27 ft wide.

Who owns E1150 over Cobb Creek?

It is owned by the County Highway Agency.