US Bridges

Stanfield Road over I 8

Fair

Pinal County, Arizona · 9.9 MI East JCT SR 84 · Structure no. 01090

Built
1965
60 years old
Condition
Fair
inspected October 2023
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
296 ft
4 main spans
Daily traffic
919
2022 count
Owner
State
State Highway Agency

About this bridge

Stanfield Road over I 8 is a steel continuous stringer/multi-beam or girder carrying Stanfield Road over I 8 in Pinal 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 919 vehicles a day, roughly 5% of them trucks, projected to reach 929 by 2042. The structure is 296 ft (90.2 m) long and 35 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

Open in Google Maps
CarriesStanfield Road
CrossesI 8
Location9.9 MI East JCT SR 84
RouteCounty Highway 0
CountyPinal County
StateArizona
Coordinates32.8279, -111.9636
Functional classRural Major Collector

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.
Superstructure7 GoodSome minor problems.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionOctober 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 rating59 US tons
Inventory rating36 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans4
Design loadHS 20
Structure length296 ft (90.2 m)
Longest span92 ft (28 m)
Deck width35 ft (10.8 m)
Roadway width30 ft (9.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic919 (2022)
Projected traffic929 by 2042
Trucks5%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesHighway
Detour if closed1.9 mi (3 km)
TollOn a free road
National Highway SystemNo

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 Stanfield Road over I 8 built?

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

What condition is Stanfield Road over I 8 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 October 2023.

How much traffic does Stanfield Road over I 8 carry?

About 919 vehicles per day (2022 count), of which roughly 5% are trucks.

How long is Stanfield Road over I 8?

The structure is 296 ft (90.2 m) long with a longest span of 92 ft (28 m) and a deck 35 ft wide.

Who owns Stanfield Road over I 8?

It is owned by the State Highway Agency.