US Bridges

N2930 over Bird Creek

FairPosted for load

Kingfisher County, Oklahoma · 8.5E 3.N of US81/SH33 · Structure no. 150050000000000

Built
1960
65 years old
Condition
Fair
inspected June 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
58 ft
2 main spans
Daily traffic
50
2022 count
Owner
County
County Highway Agency

About this bridge

N2930 over Bird Creek is a steel stringer/multi-beam or girder carrying N2930 over Bird Creek in Kingfisher County, Oklahoma. It was built in 1960, so it is 65 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 5 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 50 vehicles a day, roughly 10% of them trucks, projected to reach 80 by 2042. The structure is 58 ft (17.7 m) long and 21 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

Open in Google Maps
CarriesN2930
CrossesBird Creek
Location8.5E 3.N of US81/SH33
RouteCounty Highway N2930
CountyKingfisher County
StateOklahoma
Coordinates35.90813, -97.76483
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
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure7 GoodSome minor problems.
Channel and channel protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionJune 2024
Inspection intervalevery 24 months
Operating statusPosted for load restriction
ScourFoundations stable; scour above top of footing
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating35.1 US tons
Inventory rating21.1 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans2
Design loadH 15
Structure length58 ft (17.7 m)
Longest span29 ft (8.8 m)
Deck width21 ft (6.4 m)
Roadway width18 ft (5.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic50 (2022)
Projected traffic80 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 proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$380,000
NavigationNo navigation control on waterway

Frequently asked questions

When was N2930 over Bird Creek built?

It was built in 1960, making it 65 years old in 2025.

What condition is N2930 over Bird 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 June 2024.

How much traffic does N2930 over Bird Creek carry?

About 50 vehicles per day (2022 count), of which roughly 10% are trucks.

How long is N2930 over Bird Creek?

The structure is 58 ft (17.7 m) long with a longest span of 29 ft (8.8 m) and a deck 21 ft wide.

Who owns N2930 over Bird Creek?

It is owned by the County Highway Agency.