I-35 over S.H. 59 under

Fair

McClain County, Oklahoma · 4.4 MI N Garvin C/L · Structure no. 172170000000000

Built: 1968; 57 years old
Condition: Fair; inspected June 2023
Type: Slab; Concrete Continuous
Length: 119 ft; 3 main spans
Daily traffic: 16,500; 2022 count
Owner: State; State Highway Agency

About this bridge

I-35 over S.H. 59 under is a concrete continuous slab carrying I-35 over S.H. 59 under in McClain County, Oklahoma. It was built in 1968, so it is 57 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 16,500 vehicles a day, roughly 36% of them trucks, projected to reach 26,400 by 2042. The structure is 119 ft (36.3 m) long and 38 ft wide.

Location

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CarriesI-35

CrossesS.H. 59 under

Location4.4 MI N Garvin C/L

RouteInterstate 35

CountyMcClain County

StateOklahoma

Coordinates34.91327, -97.35492

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.

Component	Rating	Meaning
Deck	6 Satisfactory	Structural elements show some minor deterioration.
Superstructure	7 Good	Some minor problems.
Substructure	6 Satisfactory	Structural elements show some minor deterioration.

Last inspectionJune 2023

Inspection intervalevery 24 months

Operating statusOpen, no restriction

ScourBridge not over waterway

Structural evaluation6: Equal to present minimum criteria

Deck geometry6: Equal to present minimum criteria

Approach roadway alignment8: Equal to present desirable criteria

Operating rating61.9 US tons

Inventory rating37 US tons

Structure

Structure typeSlab

MaterialConcrete Continuous

DeckConcrete, cast-in-place

Main spans3

Design loadHS 20

Structure length119 ft (36.3 m)

Longest span52 ft (15.8 m)

Deck width38 ft (11.6 m)

Roadway width38 ft (11.6 m)

Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic16,500 (2022)

Projected traffic26,400 by 2042

Trucks36%

Lanes on structure2

Traffic directionOne-way traffic

CarriesHighway

CrossesHighway

Detour if closed—

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 proposedReplacement because of substandard load-carrying capacity or roadway geometry

Estimated improvement cost$1.4 million

NavigationNot applicable (no waterway)

Frequently asked questions

When was I-35 over S.H. 59 under built?

It was built in 1968, making it 57 years old in 2025.

What condition is I-35 over S.H. 59 under 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 2023.

How much traffic does I-35 over S.H. 59 under carry?

About 16,500 vehicles per day (2022 count), of which roughly 36% are trucks.

How long is I-35 over S.H. 59 under?

The structure is 119 ft (36.3 m) long with a longest span of 52 ft (15.8 m) and a deck 38 ft wide.

Who owns I-35 over S.H. 59 under?

It is owned by the State Highway Agency.