US Bridges

SR 77 over Wash

Good

Pinal County, Arizona · 0.7 MI S JCT SR 79 · Structure no. 04736

Built
1955
70 years old, rebuilt 1994
Condition
Good
inspected January 2025
Type
Culvert
Concrete Continuous
Length
76 ft
6 main spans
Daily traffic
11,653
2025 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 1955 and reconstructed in 1994, so it is 70 years old, older than the Arizona average of 47.8 years.

The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 11,653 vehicles a day, roughly 7% of them trucks, projected to reach 11,663 by 2042. The structure is 76 ft (23.2 m) long. If it were closed, the detour would be 1.9 mi (3 km).

Location

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CarriesSR 77
CrossesWash
Location0.7 MI S JCT SR 79
RouteState Highway 77
CountyPinal County
StateArizona
Coordinates32.54526, -110.93092
Functional classRural Principal Arterial - Other

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Culvert7 GoodSome minor problems.
Last inspectionJanuary 2025
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourCountermeasures installed to correct a previously existing problem
Structural evaluation7: Better than 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 spans6
Design loadHS 20
Structure length76 ft (23.2 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 traffic11,653 (2025)
Projected traffic11,663 by 2042
Trucks7%
Lanes on structure4
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.9 mi (3 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 1955, making it 70 years old in 2025. It was reconstructed in 1994.

What condition is SR 77 over Wash in?

The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in January 2025.

How much traffic does SR 77 over Wash carry?

About 11,653 vehicles per day (2025 count), of which roughly 7% are trucks.

How long is SR 77 over Wash?

The structure is 76 ft (23.2 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.