US Bridges

I-235 Ramp over Nat.Guard Pk. Lot Und

Fair

Oklahoma County, Oklahoma · 2.6 MI N of I-40 · Structure no. 224150000000000

Built
1989
36 years old
Condition
Fair
inspected June 2024
Type
Box Beam or Girders - Multiple
Prestressed Concrete Continuous
Length
928 ft
7 main spans
Daily traffic
30,000
2022 count
Owner
State
State Highway Agency

About this bridge

I-235 Ramp over Nat.Guard Pk. Lot Und is a prestressed concrete continuous box beam or girders - multiple carrying I-235 Ramp over Nat.Guard Pk. Lot Und in Oklahoma County, Oklahoma. It was built in 1989, so it is 36 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 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 30,000 vehicles a day, roughly 12% of them trucks, projected to reach 48,000 by 2042. The structure is 928 ft (282.9 m) long and 28 ft wide.

Location

Open in Google Maps
CarriesI-235 Ramp
CrossesNat.Guard Pk. Lot Und
Location2.6 MI N of I-40
RouteInterstate 235
CountyOklahoma County
StateOklahoma
Coordinates35.49103, -97.5109
Functional classUrban 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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionJune 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation6: Equal to present minimum criteria
Deck geometry7: Better than present minimum criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating49.1 US tons
Inventory rating36 US tons

Structure

Structure typeBox Beam or Girders - Multiple
MaterialPrestressed Concrete Continuous
DeckConcrete, cast-in-place
Main spans7
Design loadHS 20
Structure length928 ft (282.9 m)
Longest span156 ft (47.5 m)
Deck width28 ft (8.5 m)
Roadway width25 ft (7.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic30,000 (2022)
Projected traffic48,000 by 2042
Trucks12%
Lanes on structure1
Traffic directionOne-way traffic
CarriesHighway
CrossesOther
Detour if closed—
TollOn a free road
National Highway SystemYes

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$8.4 million
NavigationNo navigation control on waterway

Frequently asked questions

When was I-235 Ramp over Nat.Guard Pk. Lot Und built?

It was built in 1989, making it 36 years old in 2025.

What condition is I-235 Ramp over Nat.Guard Pk. Lot Und 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 June 2024.

How much traffic does I-235 Ramp over Nat.Guard Pk. Lot Und carry?

About 30,000 vehicles per day (2022 count), of which roughly 12% are trucks.

How long is I-235 Ramp over Nat.Guard Pk. Lot Und?

The structure is 928 ft (282.9 m) long with a longest span of 156 ft (47.5 m) and a deck 28 ft wide.

Who owns I-235 Ramp over Nat.Guard Pk. Lot Und?

It is owned by the State Highway Agency.