US Bridges

Mission Road over Ajo Wash

Good

Pima County, Arizona · 0.1 MI S JCT Ajo Way · Structure no. 09615

Built
1969
56 years old, rebuilt 1977
Condition
Good
inspected May 2023
Type
Culvert
Concrete Continuous
Length
50 ft
4 main spans
Daily traffic
7,936
2023 count
Owner
City
City or Municipal Highway Agency

About this bridge

Mission Road over Ajo Wash is a concrete continuous culvert carrying Mission Road over Ajo Wash in Pima County, Arizona. It was built in 1969 and reconstructed in 1977, so it is 56 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 7,936 vehicles a day, roughly 5% of them trucks, projected to reach 7,946 by 2042. The structure is 50 ft (15.2 m) long and 114 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

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CarriesMission Road
CrossesAjo Wash
Location0.1 MI S JCT Ajo Way
RouteCity Street 0
CountyPima County
StateArizona
Coordinates32.17592, -111.00306
Functional classUrban Minor Arterial

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 inspectionMay 2023
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Deck geometry9: Superior to present desirable criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating54 US tons
Inventory rating32 US tons

Structure

Structure typeCulvert
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans4
Design loadHS 20
Structure length50 ft (15.2 m)
Longest span10 ft (3 m)
Deck width114 ft (34.7 m)
Roadway width92 ft (28 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic7,936 (2023)
Projected traffic7,946 by 2042
Trucks5%
Lanes on structure4
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed1.9 mi (3 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCity or Municipal Highway Agency
Maintained byCity or Municipal 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 Mission Road over Ajo Wash built?

It was built in 1969, making it 56 years old in 2025. It was reconstructed in 1977.

What condition is Mission Road over Ajo 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 May 2023.

How much traffic does Mission Road over Ajo Wash carry?

About 7,936 vehicles per day (2023 count), of which roughly 5% are trucks.

How long is Mission Road over Ajo Wash?

The structure is 50 ft (15.2 m) long with a longest span of 10 ft (3 m) and a deck 114 ft wide.

Who owns Mission Road over Ajo Wash?

It is owned by the City or Municipal Highway Agency.