US Bridges

Oak Street over Grand Canal

Fair

Maricopa County, Arizona · .3 MI E of 24th ST · Structure no. 08491

Built
1947
78 years old, rebuilt 1974
Condition
Fair
inspected January 2024
Type
Slab
Concrete Continuous
Length
66 ft
3 main spans
Daily traffic
8,607
2019 count
Owner
City
City or Municipal Highway Agency

About this bridge

Oak Street over Grand Canal is a concrete continuous slab carrying Oak Street over Grand Canal in Maricopa County, Arizona. It was built in 1947 and reconstructed in 1974, so it is 78 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 8,607 vehicles a day, roughly 1% of them trucks, projected to reach 8,617 by 2039. The structure is 66 ft (20.1 m) long and 51 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

Open in Google Maps
CarriesOak Street
CrossesGrand Canal
Location.3 MI E of 24th ST
RouteCity Street 0
CountyMaricopa County
StateArizona
Coordinates33.4731, -112.0255
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.
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 evaluation5: Somewhat better than minimum adequacy to tolerate being 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 alignment8: Equal to present desirable criteria
Operating rating44 US tons
Inventory rating26.3 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length66 ft (20.1 m)
Longest span25 ft (7.6 m)
Deck width51 ft (15.5 m)
Roadway width40 ft (12.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic8,607 (2019)
Projected traffic8,617 by 2039
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 Oak Street over Grand Canal built?

It was built in 1947, making it 78 years old in 2025. It was reconstructed in 1974.

What condition is Oak Street 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 Oak Street over Grand Canal carry?

About 8,607 vehicles per day (2019 count), of which roughly 1% are trucks.

How long is Oak Street over Grand Canal?

The structure is 66 ft (20.1 m) long with a longest span of 25 ft (7.6 m) and a deck 51 ft wide.

Who owns Oak Street over Grand Canal?

It is owned by the City or Municipal Highway Agency.