US Bridges

I-35 SB Ramp over I-35 NB under

Good

Oklahoma County, Oklahoma · 4.7 MI N I-35 & I-44 · Structure no. 208570000000000

Built
1984
41 years old
Condition
Good
inspected June 2024
Type
Box Beam or Girders - Single or Spread
Prestressed Concrete Continuous
Length
292 ft
3 main spans
Daily traffic
5,000
2022 count
Owner
State
State Highway Agency

About this bridge

I-35 SB Ramp over I-35 NB under is a prestressed concrete continuous box beam or girders - single or spread carrying I-35 SB Ramp over I-35 NB under in Oklahoma County, Oklahoma. It was built in 1984, so it is 41 years old, younger than the Oklahoma average of 47.8 years.

The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 5,000 vehicles a day, roughly 12% of them trucks, projected to reach 8,000 by 2042. The structure is 292 ft (89 m) long and 28 ft wide.

Location

Open in Google Maps
CarriesI-35 SB Ramp
CrossesI-35 NB under
Location4.7 MI N I-35 & I-44
RouteInterstate 35
CountyOklahoma County
StateOklahoma
Coordinates35.60395, -97.42645
Functional classUrban Principal Arterial - Interstate

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure8 Very GoodNo problems noted.
Substructure7 GoodSome minor problems.
Last inspectionJune 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation7: Better than present minimum criteria
Deck geometry7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating49.1 US tons
Inventory rating36 US tons

Structure

Structure typeBox Beam or Girders - Single or Spread
MaterialPrestressed Concrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length292 ft (89 m)
Longest span150 ft (45.7 m)
Deck width28 ft (8.5 m)
Roadway width25 ft (7.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic5,000 (2022)
Projected traffic8,000 by 2042
Trucks12%
Lanes on structure1
Traffic directionOne-way traffic
CarriesHighway
CrossesHighway
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 proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$3.5 million
NavigationNot applicable (no waterway)

Frequently asked questions

When was I-35 SB Ramp over I-35 NB under built?

It was built in 1984, making it 41 years old in 2025.

What condition is I-35 SB Ramp over I-35 NB under in?

The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in June 2024.

How much traffic does I-35 SB Ramp over I-35 NB under carry?

About 5,000 vehicles per day (2022 count), of which roughly 12% are trucks.

How long is I-35 SB Ramp over I-35 NB under?

The structure is 292 ft (89 m) long with a longest span of 150 ft (45.7 m) and a deck 28 ft wide.

Who owns I-35 SB Ramp over I-35 NB under?

It is owned by the State Highway Agency.