US Bridges

79th ST over Wash

Good

Maricopa County, Arizona · E of E Williams DR · Structure no. 11270

Built
1999
26 years old
Condition
Good
inspected January 2025
Type
Culvert
Concrete Continuous
Length
41 ft
6 main spans
Daily traffic
310
2025 count
Owner
City
City or Municipal Highway Agency

About this bridge

79th ST over Wash is a concrete continuous culvert carrying 79th ST over Wash in Maricopa County, Arizona. It was built in 1999, so it is 26 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 310 vehicles a day, roughly 5% of them trucks, projected to reach 320 by 2040. The structure is 41 ft (12.5 m) long and 47 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

No coordinates are recorded for this structure.

Carries79th ST
CrossesWash
LocationE of E Williams DR
RouteCity Street 0
StateArizona
Functional classUrban Local

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 inspectionJanuary 2025
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 adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating58 US tons
Inventory rating35.1 US tons

Structure

Structure typeCulvert
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans6
Design loadHS 20
Structure length41 ft (12.5 m)
Longest span6 ft (1.8 m)
Deck width47 ft (14.3 m)
Roadway width26 ft (7.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic310 (2025)
Projected traffic320 by 2040
Trucks5%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed1.2 mi (2 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCity or Municipal Highway Agency
Maintained byCity or Municipal 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 79th ST over Wash built?

It was built in 1999, making it 26 years old in 2025.

What condition is 79th ST 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 79th ST over Wash carry?

About 310 vehicles per day (2025 count), of which roughly 5% are trucks.

How long is 79th ST over Wash?

The structure is 41 ft (12.5 m) long with a longest span of 6 ft (1.8 m) and a deck 47 ft wide.

Who owns 79th ST over Wash?

It is owned by the City or Municipal Highway Agency.