US Bridges

Stella Road over Kinnison Wash

Fair

Pima County, Arizona · 300 Ft E Pantano RD · Structure no. 08688

Built
1978
47 years old
Condition
Fair
inspected November 2023
Type
Culvert
Concrete Continuous
Length
46 ft
4 main spans
Daily traffic
1,000
2022 count
Owner
City
City or Municipal Highway Agency

About this bridge

Stella Road over Kinnison Wash is a concrete continuous culvert carrying Stella Road over Kinnison Wash in Pima County, Arizona. It was built in 1978, so it is 47 years old, younger 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 1,000 vehicles a day, roughly 10% of them trucks, projected to reach 1,010 by 2042. The structure is 46 ft (14 m) long and 64 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

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CarriesStella Road
CrossesKinnison Wash
Location300 Ft E Pantano RD
RouteCity Street 0
CountyPima County
StateArizona
Coordinates32.1845, -110.823
Functional classUrban Collector

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 protection6 SatisfactoryStructural elements show some minor deterioration.
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 geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating53 US tons
Inventory rating32 US tons

Structure

Structure typeCulvert
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans4
Design loadHS 20
Structure length46 ft (14 m)
Longest span10 ft (3 m)
Deck width64 ft (19.5 m)
Roadway width48 ft (14.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,000 (2022)
Projected traffic1,010 by 2042
Trucks10%
Lanes on structure3
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed1.2 mi (2 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 Stella Road over Kinnison Wash built?

It was built in 1978, making it 47 years old in 2025.

What condition is Stella Road over Kinnison 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 Stella Road over Kinnison Wash carry?

About 1,000 vehicles per day (2022 count), of which roughly 10% are trucks.

How long is Stella Road over Kinnison Wash?

The structure is 46 ft (14 m) long with a longest span of 10 ft (3 m) and a deck 64 ft wide.

Who owns Stella Road over Kinnison Wash?

It is owned by the City or Municipal Highway Agency.