US Bridges

Ina Road over Nanini Wash

Good

Pima County, Arizona · 300 Ft E LA Canada DR · Structure no. 09727

Built
1960
65 years old, rebuilt 1981
Condition
Good
inspected November 2023
Type
Culvert
Concrete Continuous
Length
30 ft
3 main spans
Daily traffic
31,111
2022 count
Owner
County
County Highway Agency

About this bridge

Ina Road over Nanini Wash is a concrete continuous culvert carrying Ina Road over Nanini Wash in Pima County, Arizona. It was built in 1960 and reconstructed in 1981, so it is 65 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 31,111 vehicles a day, projected to reach 31,121 by 2042. The structure is 30 ft (9.1 m) long and 104 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesIna Road
CrossesNanini Wash
Location300 Ft E LA Canada DR
RouteCounty Highway 423
CountyPima County
StateArizona
Coordinates32.33716, -110.99428
Functional classUrban Other Principal 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 inspectionNovember 2023
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry7: Better than present minimum criteria
Waterway adequacy5: Somewhat better than minimum adequacy to tolerate being left in place as is
Approach roadway alignment8: Equal to present desirable criteria
Operating rating50 US tons
Inventory rating30 US tons

Structure

Structure typeCulvert
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length30 ft (9.1 m)
Longest span9 ft (2.7 m)
Deck width104 ft (31.7 m)
Roadway width90 ft (27.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic31,111 (2022)
Projected traffic31,121 by 2042
Trucks0%
Lanes on structure6
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.2 mi (2 km)
TollOn a free road
National Highway SystemYes

Ownership and planned work

OwnerCounty Highway Agency
Maintained byCounty 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 Ina Road over Nanini Wash built?

It was built in 1960, making it 65 years old in 2025. It was reconstructed in 1981.

What condition is Ina Road over Nanini 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 November 2023.

How much traffic does Ina Road over Nanini Wash carry?

About 31,111 vehicles per day (2022 count).

How long is Ina Road over Nanini Wash?

The structure is 30 ft (9.1 m) long with a longest span of 9 ft (2.7 m) and a deck 104 ft wide.

Who owns Ina Road over Nanini Wash?

It is owned by the County Highway Agency.