US Bridges

15th Avenue over Grand Canal

Fair

Maricopa County, Arizona · 0.38 MI N of Indian Schl · Structure no. 08494

Built
1957
68 years old
Condition
Fair
inspected January 2024
Type
Slab
Concrete Continuous
Length
58 ft
3 main spans
Daily traffic
23,182
2021 count
Owner
City
City or Municipal Highway Agency

About this bridge

15th Avenue over Grand Canal is a concrete continuous slab carrying 15th Avenue over Grand Canal in Maricopa County, Arizona. It was built in 1957, so it is 68 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 5 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 23,182 vehicles a day, roughly 1% of them trucks, projected to reach 23,192 by 2041. The structure is 58 ft (17.7 m) long and 55 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

Open in Google Maps
Carries15th Avenue
CrossesGrand Canal
Location0.38 MI N of Indian Schl
RouteCity Street 0
CountyMaricopa County
StateArizona
Coordinates33.5004, -112.0914
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.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection7 GoodSome minor problems.
Last inspectionJanuary 2024
Inspection intervalevery 12 months
Operating statusOpen, no restriction
ScourScour critical; foundations unstable for calculated scour conditions
Structural evaluation4: Meets minimum tolerable limits to be left in place as is
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 rating34.1 US tons
Inventory rating20.4 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length58 ft (17.7 m)
Longest span21 ft (6.4 m)
Deck width55 ft (16.7 m)
Roadway width44 ft (13.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic23,182 (2021)
Projected traffic23,192 by 2041
Trucks1%
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 proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$1,000 (2020 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was 15th Avenue over Grand Canal built?

It was built in 1957, making it 68 years old in 2025.

What condition is 15th Avenue over Grand 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 15th Avenue over Grand Canal carry?

About 23,182 vehicles per day (2021 count), of which roughly 1% are trucks.

How long is 15th Avenue over Grand Canal?

The structure is 58 ft (17.7 m) long with a longest span of 21 ft (6.4 m) and a deck 55 ft wide.

Who owns 15th Avenue over Grand Canal?

It is owned by the City or Municipal Highway Agency.