US Bridges

IRR BIA 34 over Wash

Good

Pima County, Arizona · 24.3 KM NE of Az HWY 86 · Structure no. 00000000000H639

Built
1974
51 years old
Condition
Good
inspected January 2023
Type
Culvert
Concrete Continuous
Length
21 ft
2 main spans
Daily traffic
170
2023 count
Owner
Federal
Bureau of Indian Affairs

About this bridge

IRR BIA 34 over Wash is a concrete continuous culvert carrying IRR BIA 34 over Wash in Pima County, Arizona. It was built in 1974, so it is 51 years old, older than the Arizona average of 47.8 years.

The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 170 vehicles a day, roughly 2% of them trucks, projected to reach 221 by 2043. The structure is 21 ft (6.4 m) long and 38 ft wide. If it were closed, the detour would be 59.7 mi (96 km).

Location

Open in Google Maps
CarriesIRR BIA 34
CrossesWash
Location24.3 KM NE of Az HWY 86
RouteFederal Lands Road 34
CountyPima County
StateArizona
Coordinates32.36142, -112.44961
Functional classRural Minor Collector

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Culvert7 GoodSome minor problems.
Last inspectionJanuary 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating49.1 US tons
Inventory rating35.9 US tons

Structure

Structure typeCulvert
MaterialConcrete Continuous
DeckNot applicable
Main spans2
Design loadHS 20
Structure length21 ft (6.4 m)
Longest span10 ft (3.1 m)
Deck width38 ft (11.7 m)
Roadway width26 ft (8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic170 (2023)
Projected traffic221 by 2043
Trucks2%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed59.7 mi (96 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$30,000 (2023 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was IRR BIA 34 over Wash built?

It was built in 1974, making it 51 years old in 2025.

What condition is IRR BIA 34 over Wash in?

The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in January 2023.

How much traffic does IRR BIA 34 over Wash carry?

About 170 vehicles per day (2023 count), of which roughly 2% are trucks.

How long is IRR BIA 34 over Wash?

The structure is 21 ft (6.4 m) long with a longest span of 10 ft (3.1 m) and a deck 38 ft wide.

Who owns IRR BIA 34 over Wash?

It is owned by the Bureau of Indian Affairs.