US Bridges

N4050 over Chun Creek

Fair

Pittsburg County, Oklahoma · 1 S 2 E of Savana · Structure no. 064140000000000

Built
1938
87 years old, rebuilt 1997
Condition
Fair
inspected August 2023
Type
Stringer/Multi-beam or Girder
Steel
Length
79 ft
3 main spans
Daily traffic
100
2022 count
Owner
County
County Highway Agency

About this bridge

N4050 over Chun Creek is a steel stringer/multi-beam or girder carrying N4050 over Chun Creek in Pittsburg County, Oklahoma. It was built in 1938 and reconstructed in 1997, so it is 87 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 100 vehicles a day, roughly 10% of them trucks, projected to reach 160 by 2042. The structure is 79 ft (24.1 m) long and 17 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

Location

Open in Google Maps
CarriesN4050
CrossesChun Creek
Location1 S 2 E of Savana
RouteCounty Highway N4050
CountyPittsburg County
StateOklahoma
Coordinates34.81451, -95.81195
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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionAugust 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry3: Basically intolerable, requiring high priority of corrective action
Waterway adequacy4: Meets minimum tolerable limits to be left in place as is
Approach roadway alignment8: Equal to present desirable criteria
Operating rating70 US tons
Inventory rating42 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans3
Design loadUnknown
Structure length79 ft (24.1 m)
Longest span29 ft (8.8 m)
Deck width17 ft (5.2 m)
Roadway width17 ft (5.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic100 (2022)
Projected traffic160 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$448,000
NavigationNo navigation control on waterway

Frequently asked questions

When was N4050 over Chun Creek built?

It was built in 1938, making it 87 years old in 2025. It was reconstructed in 1997.

What condition is N4050 over Chun 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 August 2023.

How much traffic does N4050 over Chun Creek carry?

About 100 vehicles per day (2022 count), of which roughly 10% are trucks.

How long is N4050 over Chun Creek?

The structure is 79 ft (24.1 m) long with a longest span of 29 ft (8.8 m) and a deck 17 ft wide.

Who owns N4050 over Chun Creek?

It is owned by the County Highway Agency.