US Bridges

SR 77 over Navajo Wash

Good

Pima County, Arizona · 1.8 MI NE JCT I-10 · Structure no. 04729

Built
1965
60 years old, rebuilt 1979
Condition
Good
inspected February 2022
Type
Culvert
Concrete Continuous
Length
39 ft
3 main spans
Daily traffic
40,463
2016 count
Owner
State
State Highway Agency

About this bridge

SR 77 over Navajo Wash is a concrete continuous culvert carrying SR 77 over Navajo Wash in Pima County, Arizona. It was built in 1965 and reconstructed in 1979, 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 40,463 vehicles a day, roughly 9% of them trucks, projected to reach 40,473 by 2037. The structure is 39 ft (11.9 m) long and 126 ft wide. If it were closed, the detour would be 13 mi (21 km).

Location

Open in Google Maps
CarriesSR 77
CrossesNavajo Wash
Location1.8 MI NE JCT I-10
RouteState Highway 77
CountyPima County
StateArizona
Coordinates32.2665, -110.9781
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 protection6 SatisfactoryStructural elements show some minor deterioration.
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
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating60 US tons
Inventory rating36 US tons

Structure

Structure typeCulvert
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length39 ft (11.9 m)
Longest span12 ft (3.7 m)
Deck width126 ft (38.4 m)
Roadway width96 ft (29.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic40,463 (2016)
Projected traffic40,473 by 2037
Trucks9%
Lanes on structure7
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
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 proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was SR 77 over Navajo Wash built?

It was built in 1965, making it 60 years old in 2025. It was reconstructed in 1979.

What condition is SR 77 over Navajo 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 Navajo Wash carry?

About 40,463 vehicles per day (2016 count), of which roughly 9% are trucks.

How long is SR 77 over Navajo Wash?

The structure is 39 ft (11.9 m) long with a longest span of 12 ft (3.7 m) and a deck 126 ft wide.

Who owns SR 77 over Navajo Wash?

It is owned by the State Highway Agency.