SR 77 over Pfister Wash

Fair

Pinal County, Arizona · 5.8 MI S JCT SR 177 · Structure no. 00803

Built: 1964; 61 years old
Condition: Fair; inspected February 2024
Type: Slab; Concrete Continuous
Length: 80 ft; 3 main spans
Daily traffic: 2,525; 2023 count
Owner: State; State Highway Agency

About this bridge

SR 77 over Pfister Wash is a concrete continuous slab carrying SR 77 over Pfister Wash in Pinal County, Arizona. It was built in 1964, so it is 61 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 2,525 vehicles a day, roughly 10% of them trucks, projected to reach 2,535 by 2042. The structure is 80 ft (24.4 m) long and 45 ft wide. If it were closed, the detour would be 29.8 mi (48 km).

Location

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CarriesSR 77

CrossesPfister Wash

Location5.8 MI S JCT SR 177

RouteState Highway 77

CountyPinal County

StateArizona

Coordinates32.91543, -110.72085

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
Deck	6 Satisfactory	Structural elements show some minor deterioration.
Superstructure	6 Satisfactory	Structural elements show some minor deterioration.
Substructure	6 Satisfactory	Structural elements show some minor deterioration.
Channel and channel protection	7 Good	Some minor problems.

Last inspectionFebruary 2024

Inspection intervalevery 24 months

Operating statusOpen, no restriction

ScourCountermeasures installed to correct a previously existing problem

Structural evaluation6: Equal to present minimum criteria

Deck geometry6: Equal to present minimum criteria

Waterway adequacy8: Equal to present desirable criteria

Approach roadway alignment8: Equal to present desirable criteria

Operating rating55 US tons

Inventory rating33 US tons

Structure

Structure typeSlab

MaterialConcrete Continuous

DeckConcrete, cast-in-place

Main spans3

Design loadHS 20

Structure length80 ft (24.4 m)

Longest span30 ft (9.1 m)

Deck width45 ft (13.8 m)

Roadway width43 ft (13 m)

Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic2,525 (2023)

Projected traffic2,535 by 2042

Trucks10%

Lanes on structure2

Traffic directionTwo-way traffic

CarriesHighway

CrossesWaterway

Detour if closed29.8 mi (48 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 Pfister Wash built?

It was built in 1964, making it 61 years old in 2025.

What condition is SR 77 over Pfister 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 February 2024.

How much traffic does SR 77 over Pfister Wash carry?

About 2,525 vehicles per day (2023 count), of which roughly 10% are trucks.

How long is SR 77 over Pfister Wash?

The structure is 80 ft (24.4 m) long with a longest span of 30 ft (9.1 m) and a deck 45 ft wide.

Who owns SR 77 over Pfister Wash?

It is owned by the State Highway Agency.