US Bridges

N2450 over Cobb Creek

Good

Washita County, Oklahoma · 3.E 2.9S of Colony · Structure no. 238570000000000

Built
1994
31 years old
Condition
Good
inspected January 2023
Type
Tee Beam
Prestressed Concrete
Length
150 ft
3 main spans
Daily traffic
25
2022 count
Owner
County
County Highway Agency

About this bridge

N2450 over Cobb Creek is a prestressed concrete tee beam carrying N2450 over Cobb Creek in Washita County, Oklahoma. It was built in 1994, so it is 31 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 25 vehicles a day, roughly 10% of them trucks, projected to reach 40 by 2042. The structure is 150 ft (45.7 m) long and 28 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

CarriesN2450
CrossesCobb Creek
Location3.E 2.9S of Colony
RouteCounty Highway N2450
Coordinates35.30677, -98.62349
Functional classRural Local

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.
Superstructure7 GoodSome minor problems.
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 evaluation7: Better than 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 rating70 US tons
Inventory rating36 US tons

Structure

Structure typeTee Beam
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length150 ft (45.7 m)
Longest span48 ft (14.6 m)
Deck width28 ft (8.5 m)
Roadway width26 ft (8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic25 (2022)
Projected traffic40 by 2042
Trucks10%
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 proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$612,000
NavigationNo navigation control on waterway

Frequently asked questions

When was N2450 over Cobb Creek built?

It was built in 1994, making it 31 years old in 2025.

What condition is N2450 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 N2450 over Cobb Creek carry?

About 25 vehicles per day (2022 count), of which roughly 10% are trucks.

How long is N2450 over Cobb Creek?

The structure is 150 ft (45.7 m) long with a longest span of 48 ft (14.6 m) and a deck 28 ft wide.

Who owns N2450 over Cobb Creek?

It is owned by the County Highway Agency.