I-8 EB over County Road

Fair

Maricopa County, Arizona · 1.1 MI E JCT SR 85 · Structure no. 01341

Built: 1965; 60 years old
Condition: Fair; inspected January 2025
Type: Slab; Concrete Continuous
Length: 107 ft; 3 main spans
Daily traffic: 1,565; 2022 count
Owner: State; State Highway Agency

About this bridge

I-8 EB over County Road is a concrete continuous slab carrying I-8 EB over County Road in Maricopa County, Arizona. It was built in 1965, so it is 60 years old, older than the Arizona 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 1,565 vehicles a day, roughly 66% of them trucks, projected to reach 1,575 by 2042. The structure is 107 ft (32.6 m) long and 40 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

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CarriesI-8 EB

CrossesCounty Road

Location1.1 MI E JCT SR 85

RouteInterstate 8

CountyMaricopa County

StateArizona

Coordinates32.9349, -112.7157

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	6 Satisfactory	Structural elements show some minor deterioration.
Substructure	7 Good	Some minor problems.

Last inspectionJanuary 2025

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 rating59 US tons

Inventory rating36 US tons

Structure

Structure typeSlab

MaterialConcrete Continuous

DeckConcrete, cast-in-place

Main spans3

Design loadHS 20

Structure length107 ft (32.6 m)

Longest span40 ft (12.2 m)

Deck width40 ft (12.3 m)

Roadway width38 ft (11.6 m)

Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,565 (2022)

Projected traffic1,575 by 2042

Trucks66%

Lanes on structure2

Traffic directionOne-way traffic

CarriesHighway

CrossesHighway

Detour if closed1.2 mi (2 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 proposedNone recorded

Estimated improvement cost—

NavigationNot applicable (no waterway)

Frequently asked questions

When was I-8 EB over County Road built?

It was built in 1965, making it 60 years old in 2025.

What condition is I-8 EB over County Road 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 2025.

How much traffic does I-8 EB over County Road carry?

About 1,565 vehicles per day (2022 count), of which roughly 66% are trucks.

How long is I-8 EB over County Road?

The structure is 107 ft (32.6 m) long with a longest span of 40 ft (12.2 m) and a deck 40 ft wide.

Who owns I-8 EB over County Road?

It is owned by the State Highway Agency.