US Bridges

SR 77 over Wash

Good

Pima County, Arizona · 12.6 MI S JCT SR 79 · Structure no. 06756

Built
1979
46 years old, rebuilt 2008
Condition
Good
inspected February 2022
Type
Culvert
Concrete Continuous
Length
45 ft
3 main spans
Daily traffic
35,030
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 Pima County, Arizona. It was built in 1979 and reconstructed in 2008, so it is 46 years old, younger 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 35,030 vehicles a day, roughly 9% of them trucks, projected to reach 35,040 by 2041. The structure is 45 ft (13.7 m) long. If it were closed, the detour would be 13 mi (21 km).

Location

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CarriesSR 77
CrossesWash
Location12.6 MI S JCT SR 79
RouteState Highway 77
CountyPima County
StateArizona
Coordinates32.3857, -110.9642
Functional classUrban Other Principal 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 protection8 Very GoodNo problems noted.
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 rating99 US tons
Inventory rating83 US tons

Structure

Structure typeCulvert
MaterialConcrete Continuous
DeckNot applicable
Main spans3
Design loadHS 20
Structure length45 ft (13.7 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 traffic35,030 (2021)
Projected traffic35,040 by 2041
Trucks9%
Lanes on structure7
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed13 mi (21 km)
TollOn a free road
National Highway SystemYes

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$2,000 (2022 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was SR 77 over Wash built?

It was built in 1979, making it 46 years old in 2025. It was reconstructed in 2008.

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 35,030 vehicles per day (2021 count), of which roughly 9% are trucks.

How long is SR 77 over Wash?

The structure is 45 ft (13.7 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.