US Bridges

N3430 over Creek

FairPosted for load

Pottawatomie County, Oklahoma · 3.8 N & 1.7 E of Chisney · Structure no. 279170000000000

Built
2004
21 years old
Condition
Fair
inspected February 2023
Type
Stringer/Multi-beam or Girder
Steel
Length
69 ft
1 main span
Daily traffic
50
2022 count
Owner
County
County Highway Agency

About this bridge

N3430 over Creek is a steel stringer/multi-beam or girder carrying N3430 over Creek in Pottawatomie County, Oklahoma. It was built in 2004, so it is 21 years old, younger 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 69 ft (21 m) long and 27 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

Open in Google Maps
CarriesN3430
CrossesCreek
Location3.8 N & 1.7 E of Chisney
RouteCounty Highway N3430
CountyPottawatomie County
StateOklahoma
Coordinates35.20023, -96.89691
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.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionFebruary 2023
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 geometry6: Equal to present minimum criteria
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating43 US tons
Inventory rating26 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20
Structure length69 ft (21 m)
Longest span67 ft (20.4 m)
Deck width27 ft (8.2 m)
Roadway width25 ft (7.7 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$885,000
NavigationNo navigation control on waterway

Frequently asked questions

When was N3430 over Creek built?

It was built in 2004, making it 21 years old in 2025.

What condition is N3430 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 February 2023.

How much traffic does N3430 over Creek carry?

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

How long is N3430 over Creek?

The structure is 69 ft (21 m) long with a longest span of 67 ft (20.4 m) and a deck 27 ft wide.

Who owns N3430 over Creek?

It is owned by the County Highway Agency.