US Bridges

27th Avenue over Grand Canal

Fair

Maricopa County, Arizona · 0.16 MI N of Osborn Road · Structure no. 09311

Built
1975
50 years old
Condition
Fair
inspected January 2023
Type
Slab
Concrete Continuous
Length
44 ft
2 main spans
Daily traffic
31,022
2021 count
Owner
City
City or Municipal Highway Agency

About this bridge

27th Avenue over Grand Canal is a concrete continuous slab carrying 27th Avenue over Grand Canal in Maricopa County, Arizona. It was built in 1975, so it is 50 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 31,022 vehicles a day, roughly 1% of them trucks, projected to reach 31,032 by 2041. The structure is 44 ft (13.4 m) long and 76 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

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Carries27th Avenue
CrossesGrand Canal
Location0.16 MI N of Osborn Road
RouteCity Street 0
CountyMaricopa County
StateArizona
Coordinates33.49, -112.1171
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.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
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 evaluation6: Equal to present minimum criteria
Deck geometry2: Basically intolerable, requiring high priority of replacement
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating54.2 US tons
Inventory rating32.4 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans2
Design loadHS 20
Structure length44 ft (13.4 m)
Longest span21 ft (6.4 m)
Deck width76 ft (23.2 m)
Roadway width64 ft (19.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic31,022 (2021)
Projected traffic31,032 by 2041
Trucks1%
Lanes on structure6
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 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 27th Avenue over Grand Canal built?

It was built in 1975, making it 50 years old in 2025.

What condition is 27th 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 27th Avenue over Grand Canal carry?

About 31,022 vehicles per day (2021 count), of which roughly 1% are trucks.

How long is 27th Avenue over Grand Canal?

The structure is 44 ft (13.4 m) long with a longest span of 21 ft (6.4 m) and a deck 76 ft wide.

Who owns 27th Avenue over Grand Canal?

It is owned by the City or Municipal Highway Agency.