US Bridges

SR 77 over Wash

Good

Pinal County, Arizona · 3.2 MI S JCT SR 177 · Structure no. 04389

Built
1965
60 years old
Condition
Good
inspected February 2022
Type
Culvert
Concrete Continuous
Length
43 ft
4 main spans
Daily traffic
2,411
2021 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 1965, so it is 60 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 2,411 vehicles a day, roughly 11% of them trucks, projected to reach 2,421 by 2041. The structure is 43 ft (13.1 m) long. If it were closed, the detour would be 24.2 mi (39 km).

Location

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CarriesSR 77
CrossesWash
Location3.2 MI S JCT SR 177
RouteState Highway 77
CountyPinal County
StateArizona
Coordinates32.9491, -110.7432
Functional classRural Minor Arterial

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 protection7 GoodSome minor problems.
Culvert7 GoodSome minor problems.
Last inspectionFebruary 2022
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating69 US tons
Inventory rating41 US tons

Structure

Structure typeCulvert
MaterialConcrete Continuous
DeckNot applicable
Main spans4
Design loadHS 20
Structure length43 ft (13.1 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 traffic2,411 (2021)
Projected traffic2,421 by 2041
Trucks11%
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 1965, making it 60 years old in 2025.

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 February 2022.

How much traffic does SR 77 over Wash carry?

About 2,411 vehicles per day (2021 count), of which roughly 11% are trucks.

How long is SR 77 over Wash?

The structure is 43 ft (13.1 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.