US Bridges

IRR BIA RTE 15 over Wash

Poor

Pinal County, Arizona · 55.8 KM N of Az HWY 86 · Structure no. 00000000000H611

Built
1965
60 years old
Condition
Poor
inspected January 2023
Type
Culvert
Concrete Continuous
Length
64 ft
6 main spans
Daily traffic
1,100
2023 count
Owner
Federal
Bureau of Indian Affairs

About this bridge

IRR BIA RTE 15 over Wash is a concrete continuous culvert carrying IRR BIA RTE 15 over Wash in Pinal County, Arizona. It was built in 1965, so it is 60 years old, older than the Arizona average of 47.8 years.

The most recent inspection reported to the Federal Highway Administration rates it in poor condition with a lowest component rating of 4 out of 9. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.

It carries about 1,100 vehicles a day, roughly 4% of them trucks, projected to reach 1,320 by 2043. The structure is 64 ft (19.6 m) long and 33 ft wide. If it were closed, the detour would be 82.6 mi (133 km).

Location

Open in Google Maps
CarriesIRR BIA RTE 15
CrossesWash
Location55.8 KM N of Az HWY 86
RouteFederal Lands Road 15
CountyPinal County
StateArizona
Coordinates32.61072, -111.89142
Functional classRural Major Collector

Condition and inspection

Poor

The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.

ComponentRatingMeaning
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Culvert4 PoorAdvanced section loss, deterioration, spalling or scour.
Last inspectionJanuary 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation4: Meets minimum tolerable limits to be left in place as is
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 rating48.7 US tons
Inventory rating35.7 US tons

Structure

Structure typeCulvert
MaterialConcrete Continuous
DeckNot applicable
Main spans6
Design loadHS 20
Structure length64 ft (19.6 m)
Longest span10 ft (3.1 m)
Deck width33 ft (10.1 m)
Roadway width31 ft (9.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,100 (2023)
Projected traffic1,320 by 2043
Trucks4%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed82.6 mi (133 km)
TollToll bridge segment under Secretarial agreement
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 proposedRehabilitation because of general structure deterioration or inadequate strength
Estimated improvement cost$31,000 (2023 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was IRR BIA RTE 15 over Wash built?

It was built in 1965, making it 60 years old in 2025.

What condition is IRR BIA RTE 15 over Wash in?

The National Bridge Inventory rates it in poor condition. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. The last reported inspection was in January 2023.

How much traffic does IRR BIA RTE 15 over Wash carry?

About 1,100 vehicles per day (2023 count), of which roughly 4% are trucks.

How long is IRR BIA RTE 15 over Wash?

The structure is 64 ft (19.6 m) long with a longest span of 10 ft (3.1 m) and a deck 33 ft wide.

Who owns IRR BIA RTE 15 over Wash?

It is owned by the Bureau of Indian Affairs.