US Bridges

IRR I 10 over Wash

Good

Pinal County, Arizona · 5.4 MI SE JCT SR 187 · Structure no. 06696

Built
1975
50 years old
Condition
Good
inspected March 2023
Type
Culvert
Concrete Continuous
Length
74 ft
6 main spans
Daily traffic
300
2018 count
Owner
State
State Highway Agency

About this bridge

IRR I 10 over Wash is a concrete continuous culvert carrying IRR I 10 over Wash in Pinal County, Arizona. It was built in 1975, so it is 50 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 300 vehicles a day, roughly 10% of them trucks, projected to reach 310 by 2038. The structure is 74 ft (22.6 m) long. If it were closed, the detour would be 5 mi (8 km).

Location

Open in Google Maps
CarriesIRR I 10
CrossesWash
Location5.4 MI SE JCT SR 187
RouteInterstate 10
CountyPinal County
StateArizona
Coordinates32.93833, -111.69833
Functional classUrban Principal Arterial - Interstate

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 protection7 GoodSome minor problems.
Culvert7 GoodSome minor problems.
Last inspectionMarch 2023
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating99 US tons
Inventory rating99 US tons

Structure

Structure typeCulvert
MaterialConcrete Continuous
DeckNot applicable
Main spans6
Design loadHS 20
Structure length74 ft (22.6 m)
Longest span12 ft (3.7 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic300 (2018)
Projected traffic310 by 2038
Trucks10%
Lanes on structure1
Traffic directionOne-way traffic
CarriesHighway
CrossesWaterway
Detour if closed5 mi (8 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 over Wash built?

It was built in 1975, making it 50 years old in 2025.

What condition is IRR I 10 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 March 2023.

How much traffic does IRR I 10 over Wash carry?

About 300 vehicles per day (2018 count), of which roughly 10% are trucks.

How long is IRR I 10 over Wash?

The structure is 74 ft (22.6 m) long with a longest span of 12 ft (3.7 m).

Who owns IRR I 10 over Wash?

It is owned by the State Highway Agency.