US Bridges

I-35 over Stillwater Creek

Fair

Payne County, Oklahoma · 2.5 MI N of JCT SH 51 · Structure no. 143270000000000

Built
1959
66 years old
Condition
Fair
inspected January 2024
Type
Culvert
Concrete
Length
45 ft
3 main spans
Daily traffic
15,500
2022 count
Owner
State
State Highway Agency

About this bridge

I-35 over Stillwater Creek is a concrete culvert carrying I-35 over Stillwater Creek in Payne County, Oklahoma. It was built in 1959, so it is 66 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 15,500 vehicles a day, roughly 36% of them trucks, projected to reach 24,800 by 2042. The structure is 45 ft (13.7 m) long. If it were closed, the detour would be 16.2 mi (26 km).

Location

Open in Google Maps
CarriesI-35
CrossesStillwater Creek
Location2.5 MI N of JCT SH 51
RouteInterstate 35
CountyPayne County
StateOklahoma
Coordinates36.14987, -97.32973
Functional classRural Principal Arterial - Interstate

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 inspectionJanuary 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation6: Equal to present minimum criteria
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating49.1 US tons
Inventory rating36 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckNot applicable
Main spans3
Design loadHS 20
Structure length45 ft (13.7 m)
Longest span17 ft (5.2 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic15,500 (2022)
Projected traffic24,800 by 2042
Trucks36%
Lanes on structure4
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed16.2 mi (26 km)
TollOn a free road
National Highway SystemYes
Strategic Highway NetworkInterstate STRAHNET route

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedWidening of existing bridge without deck rehabilitation
Estimated improvement cost$1.9 million
NavigationNo navigation control on waterway

Frequently asked questions

When was I-35 over Stillwater Creek built?

It was built in 1959, making it 66 years old in 2025.

What condition is I-35 over Stillwater 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 January 2024.

How much traffic does I-35 over Stillwater Creek carry?

About 15,500 vehicles per day (2022 count), of which roughly 36% are trucks.

How long is I-35 over Stillwater Creek?

The structure is 45 ft (13.7 m) long with a longest span of 17 ft (5.2 m).

Who owns I-35 over Stillwater Creek?

It is owned by the State Highway Agency.