US Bridges

IRR I 10; WB over Wash

Fair

Pinal County, Arizona · 4.3 MI NW JCT SR 187 · Structure no. 05433

Built
1967
58 years old
Condition
Fair
inspected February 2023
Type
Culvert
Concrete Continuous
Length
132 ft
6 main spans
Daily traffic
30,207
2017 count
Owner
State
State Highway Agency

About this bridge

IRR I 10; WB over Wash is a concrete continuous culvert carrying IRR I 10; WB over Wash in Pinal County, Arizona. It was built in 1967, so it is 58 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 30,207 vehicles a day, roughly 19% of them trucks, projected to reach 30,217 by 2037. The structure is 132 ft (40.2 m) long. If it were closed, the detour would be 98.8 mi (159 km).

CarriesIRR I 10; WB
CrossesWash
Location4.3 MI NW JCT SR 187
RouteInterstate 10
StateArizona
Coordinates33.05514, -111.7935
Functional classRural Principal Arterial - Interstate

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Channel and channel protection7 GoodSome minor problems.
Culvert6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionFebruary 2023
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating99 US tons
Inventory rating99 US tons

Structure

Structure typeCulvert
MaterialConcrete Continuous
DeckNot applicable
Main spans6
Design loadHS 20
Structure length132 ft (40.2 m)
Longest span10 ft (3 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic30,207 (2017)
Projected traffic30,217 by 2037
Trucks19%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway
CrossesWaterway
Detour if closed98.8 mi (159 km)
TollOn a free road
National Highway SystemYes
Strategic Highway NetworkInterstate STRAHNET route

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
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 I 10; WB over Wash built?

It was built in 1967, making it 58 years old in 2025.

What condition is IRR I 10; WB over Wash 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 February 2023.

How much traffic does IRR I 10; WB over Wash carry?

About 30,207 vehicles per day (2017 count), of which roughly 19% are trucks.

How long is IRR I 10; WB over Wash?

The structure is 132 ft (40.2 m) long with a longest span of 10 ft (3 m).

Who owns IRR I 10; WB over Wash?

It is owned by the State Highway Agency.