US Bridges

IRR BIA RTE 6 over Aliso Creek

Fair

Gila County, Arizona · 0.3 KM N of W JCT 70/170 · Structure no. 00000000000H206

Built
1976
49 years old
Condition
Fair
inspected January 2024
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
120 ft
2 main spans
Daily traffic
2,500
2021 count
Owner
Federal
Bureau of Indian Affairs

About this bridge

IRR BIA RTE 6 over Aliso Creek is a prestressed concrete stringer/multi-beam or girder carrying IRR BIA RTE 6 over Aliso Creek in Gila County, Arizona. It was built in 1976, so it is 49 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 2,500 vehicles a day, roughly 5% of them trucks, projected to reach 2,900 by 2038. The structure is 120 ft (36.5 m) long and 33 ft wide. If it were closed, the detour would be 29.2 mi (47 km).

CarriesIRR BIA RTE 6
CrossesAliso Creek
Location0.3 KM N of W JCT 70/170
RouteFederal Lands Road 6
StateArizona
Coordinates33.35497, -110.64956
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
Deck7 GoodSome minor problems.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionJanuary 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy5: Somewhat better than minimum adequacy to tolerate being left in place as is
Approach roadway alignment8: Equal to present desirable criteria
Operating rating53.5 US tons
Inventory rating40.6 US tons

Structure

MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans2
Design loadHS 20
Structure length120 ft (36.5 m)
Longest span58 ft (17.8 m)
Deck width33 ft (10.1 m)
Roadway width30 ft (9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic2,500 (2021)
Projected traffic2,900 by 2038
Trucks5%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed29.2 mi (47 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 6 over Aliso Creek built?

It was built in 1976, making it 49 years old in 2025.

What condition is IRR BIA RTE 6 over Aliso Creek 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 BIA RTE 6 over Aliso Creek carry?

About 2,500 vehicles per day (2021 count), of which roughly 5% are trucks.

How long is IRR BIA RTE 6 over Aliso Creek?

The structure is 120 ft (36.5 m) long with a longest span of 58 ft (17.8 m) and a deck 33 ft wide.

Who owns IRR BIA RTE 6 over Aliso Creek?

It is owned by the Bureau of Indian Affairs.