SR 79 over Wash

Fair

Pinal County, Arizona · 22.8 MI N JCT SR 77 · Structure no. 04747

Built: 1946; 79 years old
Condition: Fair; inspected March 2022
Type: Culvert; Concrete Continuous
Length: 74 ft; 6 main spans
Daily traffic: 34; 2021 count
Owner: State; State Highway Agency

About this bridge

SR 79 over Wash is a concrete continuous culvert carrying SR 79 over Wash in Pinal County, Arizona. It was built in 1946, so it is 79 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 34 vehicles a day, roughly 11% of them trucks, projected to reach 44 by 2041. The structure is 74 ft (22.6 m) long and 32 ft wide. If it were closed, the detour would be 65.2 mi (105 km).

Location

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CarriesSR 79

CrossesWash

Location22.8 MI N JCT SR 77

RouteState Highway 79

CountyPinal County

StateArizona

Coordinates32.8033, -111.1856

Functional classRural Minor Arterial

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

Component	Rating	Meaning
Channel and channel protection	7 Good	Some minor problems.
Culvert	6 Satisfactory	Structural elements show some minor deterioration.

Last inspectionMarch 2022

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 adequacy7: Better than present minimum criteria

Approach roadway alignment7: Better than present minimum criteria

Operating rating59 US tons

Inventory rating35.1 US tons

Structure

Structure typeCulvert

MaterialConcrete Continuous

DeckConcrete, cast-in-place

Main spans6

Design loadHS 20

Structure length74 ft (22.6 m)

Longest span10 ft (3 m)

Deck width32 ft (9.8 m)

Roadway width30 ft (9.2 m)

Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic34 (2021)

Projected traffic44 by 2041

Trucks11%

Lanes on structure2

Traffic directionTwo-way traffic

CarriesHighway

CrossesWaterway

Detour if closed65.2 mi (105 km)

TollOn a free road

National Highway SystemNo

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 SR 79 over Wash built?

It was built in 1946, making it 79 years old in 2025.

What condition is SR 79 over 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 March 2022.

How much traffic does SR 79 over Wash carry?

About 34 vehicles per day (2021 count), of which roughly 11% are trucks.

How long is SR 79 over Wash?

The structure is 74 ft (22.6 m) long with a longest span of 10 ft (3 m) and a deck 32 ft wide.

Who owns SR 79 over Wash?

It is owned by the State Highway Agency.