US Bridges

N3050 over Creek

Fair

Grant County, Oklahoma · .8S of Lamont · Structure no. 049540000000000

Built
1936
89 years old
Condition
Fair
inspected May 2023
Type
Culvert
Concrete
Length
61 ft
5 main spans
Daily traffic
24
2022 count
Owner
County
County Highway Agency

About this bridge

N3050 over Creek is a concrete culvert carrying N3050 over Creek in Grant County, Oklahoma. It was built in 1936, so it is 89 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.

It carries about 24 vehicles a day, roughly 10% of them trucks, projected to reach 38 by 2042. The structure is 61 ft (18.6 m) long and 32 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

CarriesN3050
CrossesCreek
Location.8S of Lamont
RouteCounty Highway N3050
Coordinates36.67893, -97.55697
Functional classRural Local

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Channel and channel protection7 GoodSome minor problems.
Culvert6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionMay 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry7: Better than present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating36 US tons
Inventory rating21.1 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckNot applicable
Main spans5
Design loadHS 20
Structure length61 ft (18.6 m)
Longest span13 ft (4 m)
Deck width32 ft (9.9 m)
Roadway width31 ft (9.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic24 (2022)
Projected traffic38 by 2042
Trucks10%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.9 mi (3 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 proposedWidening of existing bridge without deck rehabilitation
Estimated improvement cost$225,000
NavigationNo navigation control on waterway

Frequently asked questions

When was N3050 over Creek built?

It was built in 1936, making it 89 years old in 2025.

What condition is N3050 over 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 May 2023.

How much traffic does N3050 over Creek carry?

About 24 vehicles per day (2022 count), of which roughly 10% are trucks.

How long is N3050 over Creek?

The structure is 61 ft (18.6 m) long with a longest span of 13 ft (4 m) and a deck 32 ft wide.

Who owns N3050 over Creek?

It is owned by the County Highway Agency.