US Bridges

N0450 over Beaver Creek Trib.

Good

Cimarron County, Oklahoma · 2.E 4.5S of SH171&3 · Structure no. 247640000000000

Built
1997
28 years old
Condition
Good
inspected October 2023
Type
Culvert
Concrete
Length
34 ft
3 main spans
Daily traffic
25
2022 count
Owner
County
County Highway Agency

About this bridge

N0450 over Beaver Creek Trib. is a concrete culvert carrying N0450 over Beaver Creek Trib. in Cimarron County, Oklahoma. It was built in 1997, so it is 28 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 34 ft (10.4 m) long. If it were closed, the detour would be 6.8 mi (11 km).

Location

Open in Google Maps
CarriesN0450
CrossesBeaver Creek Trib.
Location2.E 4.5S of SH171&3
RouteCounty Highway N0450
CountyCimarron County
StateOklahoma
Coordinates36.69851, -102.21184
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
Channel and channel protection7 GoodSome minor problems.
Culvert7 GoodSome minor problems.
Last inspectionOctober 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
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 spans3
Design loadHS 20
Structure length34 ft (10.4 m)
Longest span10 ft (3 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 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 closed6.8 mi (11 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$225,000
NavigationNo navigation control on waterway

Frequently asked questions

When was N0450 over Beaver Creek Trib. built?

It was built in 1997, making it 28 years old in 2025.

What condition is N0450 over Beaver Creek Trib. 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 October 2023.

How much traffic does N0450 over Beaver Creek Trib. carry?

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

How long is N0450 over Beaver Creek Trib.?

The structure is 34 ft (10.4 m) long with a longest span of 10 ft (3 m).

Who owns N0450 over Beaver Creek Trib.?

It is owned by the County Highway Agency.