US Bridges

IRR BIA RTE 187 over Gila River

Fair

Pinal County, Arizona · 2.3 KM N of Az 87/287 JCT · Structure no. 00000000000H149

Built
1960
65 years old, rebuilt 1996
Condition
Fair
inspected January 2023
Type
Slab
Concrete Continuous
Length
182 ft
6 main spans
Daily traffic
600
2023 count
Owner
Federal
Bureau of Indian Affairs

About this bridge

IRR BIA RTE 187 over Gila River is a concrete continuous slab carrying IRR BIA RTE 187 over Gila River in Pinal County, Arizona. It was built in 1960 and reconstructed in 1996, so it is 65 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 600 vehicles a day, roughly 10% of them trucks, projected to reach 750 by 2043. The structure is 182 ft (55.6 m) long and 30 ft wide. If it were closed, the detour would be 9.9 mi (16 km).

Location

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CarriesIRR BIA RTE 187
CrossesGila River
Location2.3 KM N of Az 87/287 JCT
RouteFederal Lands Road 187
CountyPinal County
StateArizona
Coordinates33.01747, -111.52444
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.
Channel and channel protection7 GoodSome minor problems.
Last inspectionJanuary 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation6: Equal to present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy4: Meets minimum tolerable limits to be left in place as is
Approach roadway alignment8: Equal to present desirable criteria
Operating rating49.1 US tons
Inventory rating35.9 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans6
Design loadHS 20
Structure length182 ft (55.6 m)
Longest span32 ft (9.8 m)
Deck width30 ft (9.2 m)
Roadway width26 ft (8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic600 (2023)
Projected traffic750 by 2043
Trucks10%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed9.9 mi (16 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerBureau of Indian Affairs
Maintained byBureau of Indian Affairs
Historic statusNot eligible for the National Register of Historic Places
Work proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was IRR BIA RTE 187 over Gila River built?

It was built in 1960, making it 65 years old in 2025. It was reconstructed in 1996.

What condition is IRR BIA RTE 187 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 2023.

How much traffic does IRR BIA RTE 187 over Gila River carry?

About 600 vehicles per day (2023 count), of which roughly 10% are trucks.

How long is IRR BIA RTE 187 over Gila River?

The structure is 182 ft (55.6 m) long with a longest span of 32 ft (9.8 m) and a deck 30 ft wide.

Who owns IRR BIA RTE 187 over Gila River?

It is owned by the Bureau of Indian Affairs.