US Bridges

N285.0 over I-40 under

FairPosted for load

Canadian County, Oklahoma · 22.6 Mi. E. Caddo CO · Structure no. 167720000000000

Built
1966
59 years old
Condition
Fair
inspected April 2023
Type
Slab
Concrete Continuous
Length
181 ft
4 main spans
Daily traffic
101
2022 count
Owner
State
State Highway Agency

About this bridge

N285.0 over I-40 under is a concrete continuous slab carrying N285.0 over I-40 under in Canadian County, Oklahoma. It was built in 1966, so it is 59 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 101 vehicles a day, roughly 10% of them trucks, projected to reach 162 by 2042. The structure is 181 ft (55.2 m) long and 30 ft wide. If it were closed, the detour would be 6.2 mi (10 km).

Location

Open in Google Maps
CarriesN285.0
CrossesI-40 under
Location22.6 Mi. E. Caddo CO
RouteCounty Highway N2850
CountyCanadian County
StateOklahoma
Coordinates35.50099, -97.91936
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.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionApril 2023
Inspection intervalevery 24 months
Operating statusPosted for load restriction
ScourBridge not over waterway
Structural evaluation6: Equal to present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Approach roadway alignment8: Equal to present desirable criteria
Operating rating46 US tons
Inventory rating28 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans4
Design loadH 15
Structure length181 ft (55.2 m)
Longest span58 ft (17.7 m)
Deck width30 ft (9 m)
Roadway width24 ft (7.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic101 (2022)
Projected traffic162 by 2042
Trucks10%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesHighway
Detour if closed6.2 mi (10 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$1.9 million
NavigationNot applicable (no waterway)

Frequently asked questions

When was N285.0 over I-40 under built?

It was built in 1966, making it 59 years old in 2025.

What condition is N285.0 over I-40 under 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 April 2023.

How much traffic does N285.0 over I-40 under carry?

About 101 vehicles per day (2022 count), of which roughly 10% are trucks.

How long is N285.0 over I-40 under?

The structure is 181 ft (55.2 m) long with a longest span of 58 ft (17.7 m) and a deck 30 ft wide.

Who owns N285.0 over I-40 under?

It is owned by the State Highway Agency.