US Bridges

29th Avenue over Arizona Canal

Fair

Maricopa County, Arizona · .1 MI N of Dunlap RD · Structure no. 08497

Built
1973
52 years old
Condition
Fair
inspected January 2024
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
85 ft
1 main span
Daily traffic
18,218
2015 count
Owner
City
City or Municipal Highway Agency

About this bridge

29th Avenue over Arizona Canal is a prestressed concrete stringer/multi-beam or girder carrying 29th Avenue over Arizona Canal in Maricopa County, Arizona. It was built in 1973, so it is 52 years old, older than the Arizona average of 47.8 years.

The most recent inspection reported to the Federal Highway Administration rates it in fair condition with a lowest component rating of 6 out of 9. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

It carries about 18,218 vehicles a day, roughly 10% of them trucks, projected to reach 18,228 by 2035. The structure is 85 ft (25.9 m) long and 58 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

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Carries29th Avenue
CrossesArizona Canal
Location.1 MI N of Dunlap RD
RouteCity Street 0
CountyMaricopa County
StateArizona
Coordinates33.5704, -112.1208
Functional classUrban Collector

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection7 GoodSome minor problems.
Last inspectionJanuary 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating68.1 US tons
Inventory rating40.8 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20
Structure length85 ft (25.9 m)
Longest span80 ft (24.4 m)
Deck width58 ft (17.7 m)
Roadway width50 ft (15.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic18,218 (2015)
Projected traffic18,228 by 2035
Trucks10%
Lanes on structure3
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed1.9 mi (3 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 29th Avenue over Arizona Canal built?

It was built in 1973, making it 52 years old in 2025.

What condition is 29th Avenue over Arizona Canal in?

The National Bridge Inventory rates it in fair condition. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound. The last reported inspection was in January 2024.

How much traffic does 29th Avenue over Arizona Canal carry?

About 18,218 vehicles per day (2015 count), of which roughly 10% are trucks.

How long is 29th Avenue over Arizona Canal?

The structure is 85 ft (25.9 m) long with a longest span of 80 ft (24.4 m) and a deck 58 ft wide.

Who owns 29th Avenue over Arizona Canal?

It is owned by the City or Municipal Highway Agency.