US Bridges

I-35 NB Off-Ramp over Bird Creek

Fair

Logan County, Oklahoma · 300 Feet S. SH 33 · Structure no. 143250000000000

Built
1959
66 years old
Condition
Fair
inspected September 2024
Type
Culvert
Concrete
Length
40 ft
3 main spans
Daily traffic
7,600
2022 count
Owner
State
State Highway Agency

About this bridge

I-35 NB Off-Ramp over Bird Creek is a concrete culvert carrying I-35 NB Off-Ramp over Bird Creek in Logan 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 7,600 vehicles a day, roughly 36% of them trucks, projected to reach 12,160 by 2042. The structure is 40 ft (12.2 m) long.

Location

Open in Google Maps
CarriesI-35 NB Off-Ramp
CrossesBird Creek
Location300 Feet S. SH 33
RouteInterstate 35
CountyLogan County
StateOklahoma
Coordinates35.87725, -97.39314
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 protection6 SatisfactoryStructural elements show some minor deterioration.
Culvert6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionSeptember 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourCountermeasures installed to correct a previously existing problem
Structural evaluation6: Equal to present minimum criteria
Waterway adequacy9: Superior to present desirable 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 length40 ft (12.2 m)
Longest span14 ft (4.3 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic7,600 (2022)
Projected traffic12,160 by 2042
Trucks36%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway
CrossesWaterway
Detour if closed—
TollOn a free road
National Highway SystemNo
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$687,000
NavigationNo navigation control on waterway

Frequently asked questions

When was I-35 NB Off-Ramp over Bird Creek built?

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

What condition is I-35 NB Off-Ramp 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 September 2024.

How much traffic does I-35 NB Off-Ramp over Bird Creek carry?

About 7,600 vehicles per day (2022 count), of which roughly 36% are trucks.

How long is I-35 NB Off-Ramp over Bird Creek?

The structure is 40 ft (12.2 m) long with a longest span of 14 ft (4.3 m).

Who owns I-35 NB Off-Ramp over Bird Creek?

It is owned by the State Highway Agency.