US Bridges

12th ST over Arizona Canal

Fair

Maricopa County, Arizona · .5 MI N of Glendale Ave · Structure no. 08519

Built
1960
65 years old
Condition
Fair
inspected January 2024
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
67 ft
3 main spans
Daily traffic
21,734
2023 count
Owner
City
City or Municipal Highway Agency

About this bridge

12th ST over Arizona Canal is a steel continuous stringer/multi-beam or girder carrying 12th ST over Arizona Canal in Maricopa County, Arizona. It was built in 1960, so it is 65 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 21,734 vehicles a day, roughly 1% of them trucks, projected to reach 21,744 by 2041. The structure is 67 ft (20.4 m) long and 45 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

Open in Google Maps
Carries12th ST
CrossesArizona Canal
Location.5 MI N of Glendale Ave
RouteCity Street 0
CountyMaricopa County
StateArizona
Coordinates33.5455, -112.0564
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
Deck7 GoodSome minor problems.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionJanuary 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
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 alignment7: Better than present minimum criteria
Operating rating44.8 US tons
Inventory rating26.8 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length67 ft (20.4 m)
Longest span25 ft (7.6 m)
Deck width45 ft (13.6 m)
Roadway width40 ft (12.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic21,734 (2023)
Projected traffic21,744 by 2041
Trucks1%
Lanes on structure2
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 12th ST over Arizona Canal built?

It was built in 1960, making it 65 years old in 2025.

What condition is 12th ST 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 12th ST over Arizona Canal carry?

About 21,734 vehicles per day (2023 count), of which roughly 1% are trucks.

How long is 12th ST over Arizona Canal?

The structure is 67 ft (20.4 m) long with a longest span of 25 ft (7.6 m) and a deck 45 ft wide.

Who owns 12th ST over Arizona Canal?

It is owned by the City or Municipal Highway Agency.