US Bridges

IRR SR 87 over Gila River

Fair

Pinal County, Arizona · 2.3 MI NW of JCT SR 187 · Structure no. 00635

Built
1961
64 years old
Condition
Fair
inspected January 2024
Type
Slab
Concrete Continuous
Length
323 ft
11 main spans
Daily traffic
11,471
2022 count
Owner
State
State Highway Agency

About this bridge

IRR SR 87 over Gila River is a concrete continuous slab carrying IRR SR 87 over Gila River in Pinal County, Arizona. It was built in 1961, so it is 64 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 11,471 vehicles a day, roughly 6% of them trucks, projected to reach 11,481 by 2042. The structure is 323 ft (98.5 m) long and 35 ft wide. If it were closed, the detour would be 11.8 mi (19 km).

Location

Open in Google Maps
CarriesIRR SR 87
CrossesGila River
Location2.3 MI NW of JCT SR 187
RouteState Highway 87
CountyPinal County
StateArizona
Coordinates33.0897, -111.7081
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
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection7 GoodSome minor problems.
Last inspectionJanuary 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourCountermeasures installed to correct a previously existing problem
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating46 US tons
Inventory rating28 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans11
Design loadHS 20
Structure length323 ft (98.5 m)
Longest span30 ft (9.1 m)
Deck width35 ft (10.7 m)
Roadway width32 ft (9.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic11,471 (2022)
Projected traffic11,481 by 2042
Trucks6%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed11.8 mi (19 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 proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$2,000 (2023 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was IRR SR 87 over Gila River built?

It was built in 1961, making it 64 years old in 2025.

What condition is IRR SR 87 over Gila River 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 2024.

How much traffic does IRR SR 87 over Gila River carry?

About 11,471 vehicles per day (2022 count), of which roughly 6% are trucks.

How long is IRR SR 87 over Gila River?

The structure is 323 ft (98.5 m) long with a longest span of 30 ft (9.1 m) and a deck 35 ft wide.

Who owns IRR SR 87 over Gila River?

It is owned by the State Highway Agency.