US Bridges

59th Avenue over Az Cnl Diversion Channel

Fair

Maricopa County, Arizona · 0.2 MI S JCT Thndrbird RD · Structure no. 09885

Built
1984
41 years old
Condition
Fair
inspected May 2024
Type
Stringer/Multi-beam or Girder
Prestressed Concrete Continuous
Length
600 ft
5 main spans
Daily traffic
19,136
2024 count
Owner
City
City or Municipal Highway Agency

About this bridge

59th Avenue over Az Cnl Diversion Channel is a prestressed concrete continuous stringer/multi-beam or girder carrying 59th Avenue over Az Cnl Diversion Channel in Maricopa County, Arizona. It was built in 1984, so it is 41 years old, younger 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 19,136 vehicles a day, roughly 5% of them trucks, projected to reach 19,146 by 2042. The structure is 600 ft (182.9 m) long and 82 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

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Carries59th Avenue
CrossesAz Cnl Diversion Channel
Location0.2 MI S JCT Thndrbird RD
RouteCity Street 0
CountyMaricopa County
StateArizona
Coordinates33.60619, -112.18591
Functional classUrban Minor Arterial

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.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionMay 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to 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 rating99 US tons
Inventory rating36 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete Continuous
DeckConcrete, cast-in-place
Main spans5
Design loadHS 20
Structure length600 ft (182.9 m)
Longest span119 ft (36.3 m)
Deck width82 ft (25.1 m)
Roadway width68 ft (20.7 m)
Vertical clearance over deck30 ft (9.1 m)

Traffic and service

Average daily traffic19,136 (2024)
Projected traffic19,146 by 2042
Trucks5%
Lanes on structure5
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 59th Avenue over Az Cnl Diversion Channel built?

It was built in 1984, making it 41 years old in 2025.

What condition is 59th Avenue over Az Cnl Diversion Channel 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 May 2024.

How much traffic does 59th Avenue over Az Cnl Diversion Channel carry?

About 19,136 vehicles per day (2024 count), of which roughly 5% are trucks.

How long is 59th Avenue over Az Cnl Diversion Channel?

The structure is 600 ft (182.9 m) long with a longest span of 119 ft (36.3 m) and a deck 82 ft wide.

Who owns 59th Avenue over Az Cnl Diversion Channel?

It is owned by the City or Municipal Highway Agency.