US Bridges

Ina Road over Carmack Wash

Fair

Pima County, Arizona · 2.5 MI E of I 10 · Structure no. 09232

Built
1960
65 years old, rebuilt 1984
Condition
Fair
inspected November 2023
Type
Culvert
Concrete Continuous
Length
88 ft
7 main spans
Daily traffic
29,557
2022 count
Owner
County
County Highway Agency

About this bridge

Ina Road over Carmack Wash is a concrete continuous culvert carrying Ina Road over Carmack Wash in Pima County, Arizona. It was built in 1960 and reconstructed in 1984, 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 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 29,557 vehicles a day, projected to reach 29,567 by 2042. The structure is 88 ft (26.8 m) long and 110 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

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CarriesIna Road
CrossesCarmack Wash
Location2.5 MI E of I 10
RouteCounty Highway 423
CountyPima County
StateArizona
Coordinates32.33734, -111.02436
Functional classUrban Other Principal Arterial

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 protection4 PoorAdvanced section loss, deterioration, spalling or scour.
Culvert6 SatisfactoryStructural elements show some minor deterioration.
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 geometry9: Superior to present desirable criteria
Waterway adequacy4: Meets minimum tolerable limits to be left in place as is
Approach roadway alignment8: Equal to present desirable criteria
Operating rating46 US tons
Inventory rating27 US tons

Structure

Structure typeCulvert
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans7
Design loadHS 20
Structure length88 ft (26.8 m)
Longest span12 ft (3.7 m)
Deck width110 ft (33.5 m)
Roadway width72 ft (21.9 m)
Vertical clearance over deck32 ft (9.8 m)

Traffic and service

Average daily traffic29,557 (2022)
Projected traffic29,567 by 2042
Trucks0%
Lanes on structure2
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 Carmack Wash built?

It was built in 1960, making it 65 years old in 2025. It was reconstructed in 1984.

What condition is Ina Road over Carmack 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 November 2023.

How much traffic does Ina Road over Carmack Wash carry?

About 29,557 vehicles per day (2022 count).

How long is Ina Road over Carmack Wash?

The structure is 88 ft (26.8 m) long with a longest span of 12 ft (3.7 m) and a deck 110 ft wide.

Who owns Ina Road over Carmack Wash?

It is owned by the County Highway Agency.