US Bridges

7th Avenue over Grand Canal

Fair

Maricopa County, Arizona · 0.04 MI S of Campbell · Structure no. 09173

Built
1967
58 years old
Condition
Fair
inspected January 2023
Type
Slab
Concrete Continuous
Length
38 ft
2 main spans
Daily traffic
31,716
2021 count
Owner
City
City or Municipal Highway Agency

About this bridge

7th Avenue over Grand Canal is a concrete continuous slab carrying 7th Avenue over Grand Canal in Maricopa County, Arizona. It was built in 1967, so it is 58 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 31,716 vehicles a day, roughly 1% of them trucks, projected to reach 31,726 by 2041. The structure is 38 ft (11.6 m) long and 78 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

Location

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Carries7th Avenue
CrossesGrand Canal
Location0.04 MI S of Campbell
RouteCity Street 0
CountyMaricopa County
StateArizona
Coordinates33.5029, -112.0825
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.
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 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry2: Basically intolerable, requiring high priority of replacement
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating39.9 US tons
Inventory rating23.9 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans2
Design loadHS 20
Structure length38 ft (11.6 m)
Longest span18 ft (5.5 m)
Deck width78 ft (23.9 m)
Roadway width64 ft (19.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic31,716 (2021)
Projected traffic31,726 by 2041
Trucks1%
Lanes on structure6
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed3.1 mi (5 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 proposedRehabilitation because of general structure deterioration or inadequate strength
Estimated improvement cost$1,000 (2021 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was 7th Avenue over Grand Canal built?

It was built in 1967, making it 58 years old in 2025.

What condition is 7th 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 2023.

How much traffic does 7th Avenue over Grand Canal carry?

About 31,716 vehicles per day (2021 count), of which roughly 1% are trucks.

How long is 7th Avenue over Grand Canal?

The structure is 38 ft (11.6 m) long with a longest span of 18 ft (5.5 m) and a deck 78 ft wide.

Who owns 7th Avenue over Grand Canal?

It is owned by the City or Municipal Highway Agency.