SR 77 over Wash

Fair

Pinal County, Arizona · 17.7 MI S JCT SR 177 · Structure no. 04378

Built: 1961; 64 years old
Condition: Fair; inspected January 2025
Type: Culvert; Concrete Continuous
Length: 54 ft; 5 main spans
Daily traffic: 2,322; 2024 count
Owner: State; State Highway Agency

About this bridge

SR 77 over Wash is a concrete continuous culvert carrying SR 77 over Wash in Pinal County, Arizona. It was built in 1961, so it is 64 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 2,322 vehicles a day, roughly 12% of them trucks, projected to reach 2,332 by 2042. The structure is 54 ft (16.5 m) long. If it were closed, the detour would be 24.2 mi (39 km).

Location

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CarriesSR 77

CrossesWash

Location17.7 MI S JCT SR 177

RouteState Highway 77

CountyPinal County

StateArizona

Coordinates32.76002, -110.65179

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	6 Satisfactory	Structural elements show some minor deterioration.
Culvert	6 Satisfactory	Structural elements show some minor deterioration.

Last inspectionJanuary 2025

Inspection intervalevery 48 months

Operating statusOpen, no restriction

ScourFoundations stable; scour above top of footing

Structural evaluation6: Equal to present minimum criteria

Waterway adequacy7: Better than present minimum criteria

Approach roadway alignment8: Equal to present desirable criteria

Operating rating99 US tons

Inventory rating99 US tons

Structure

Structure typeCulvert

MaterialConcrete Continuous

DeckNot applicable

Main spans5

Design loadHS 20

Structure length54 ft (16.5 m)

Longest span10 ft (3 m)

Deck width0 ft (0 m)

Roadway width0 ft (0 m)

Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic2,322 (2024)

Projected traffic2,332 by 2042

Trucks12%

Lanes on structure2

Traffic directionTwo-way traffic

CarriesHighway

CrossesWaterway

Detour if closed24.2 mi (39 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 77 over Wash built?

It was built in 1961, making it 64 years old in 2025.

What condition is SR 77 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 January 2025.

How much traffic does SR 77 over Wash carry?

About 2,322 vehicles per day (2024 count), of which roughly 12% are trucks.

How long is SR 77 over Wash?

The structure is 54 ft (16.5 m) long with a longest span of 10 ft (3 m).

Who owns SR 77 over Wash?

It is owned by the State Highway Agency.