US Bridges

SR 84 over I 8

Fair

Pinal County, Arizona · At JCT SR 84 · Structure no. 01063

Built
1962
63 years old
Condition
Fair
inspected October 2023
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
294 ft
4 main spans
Daily traffic
1,563
2022 count
Owner
State
State Highway Agency

About this bridge

SR 84 over I 8 is a steel continuous stringer/multi-beam or girder carrying SR 84 over I 8 in Pinal County, Arizona. It was built in 1962, so it is 63 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 5 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 1,563 vehicles a day, roughly 26% of them trucks, projected to reach 1,573 by 2042. The structure is 294 ft (89.6 m) long and 35 ft wide. If it were closed, the detour would be 26.7 mi (43 km).

Location

Open in Google Maps
CarriesSR 84
CrossesI 8
LocationAt JCT SR 84
RouteState Highway 84
CountyPinal County
StateArizona
Coordinates32.8342, -112.1334
Functional classRural Principal Arterial - Other

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
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 geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Approach roadway alignment6: Equal to present minimum criteria
Operating rating61 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 length294 ft (89.6 m)
Longest span90 ft (27.4 m)
Deck width35 ft (10.7 m)
Roadway width32 ft (9.7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,563 (2022)
Projected traffic1,573 by 2042
Trucks26%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesHighway
Detour if closed26.7 mi (43 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 SR 84 over I 8 built?

It was built in 1962, making it 63 years old in 2025.

What condition is SR 84 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 SR 84 over I 8 carry?

About 1,563 vehicles per day (2022 count), of which roughly 26% are trucks.

How long is SR 84 over I 8?

The structure is 294 ft (89.6 m) long with a longest span of 90 ft (27.4 m) and a deck 35 ft wide.

Who owns SR 84 over I 8?

It is owned by the State Highway Agency.