US Bridges

I-10 over SR 87

Fair

Pinal County, Arizona · At JCT SR87/84 · Structure no. 02935

Built
2018
7 years old
Condition
Fair
inspected December 2024
Type
Stringer/Multi-beam or Girder
Prestressed Concrete Continuous
Length
296 ft
2 main spans
Daily traffic
3,541
2022 count
Owner
State
State Highway Agency

About this bridge

I-10 over SR 87 is a prestressed concrete continuous stringer/multi-beam or girder carrying I-10 over SR 87 in Pinal County, Arizona. It was built in 2018, so it is 7 years old, younger 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 3,541 vehicles a day, roughly 20% of them trucks, projected to reach 3,551 by 2042. The structure is 296 ft (90.2 m) long and 108 ft wide. If it were closed, the detour would be 5 mi (8 km).

Location

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CarriesI-10
CrossesSR 87
LocationAt JCT SR87/84
RouteState Highway 87
CountyPinal County
StateArizona
Coordinates32.7252, -111.5168
Functional classRural Minor Arterial

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.
Superstructure8 Very GoodNo problems noted.
Substructure7 GoodSome minor problems.
Last inspectionDecember 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation7: Better than present minimum criteria
Deck geometry6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating99 US tons
Inventory rating37 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete Continuous
DeckConcrete, cast-in-place
Main spans2
Design loadHL 93
Structure length296 ft (90.2 m)
Longest span145 ft (44.2 m)
Deck width108 ft (33 m)
Roadway width99 ft (30.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic3,541 (2022)
Projected traffic3,551 by 2042
Trucks20%
Lanes on structure7
Traffic directionTwo-way traffic
CarriesOverpass structure at an interchange
CrossesHighway
Detour if closed5 mi (8 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 I-10 over SR 87 built?

It was built in 2018, making it 7 years old in 2025.

What condition is I-10 over SR 87 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 December 2024.

How much traffic does I-10 over SR 87 carry?

About 3,541 vehicles per day (2022 count), of which roughly 20% are trucks.

How long is I-10 over SR 87?

The structure is 296 ft (90.2 m) long with a longest span of 145 ft (44.2 m) and a deck 108 ft wide.

Who owns I-10 over SR 87?

It is owned by the State Highway Agency.