US Bridges

Indian School Road over Grand Canal

Fair

Maricopa County, Arizona · 0.07 MI E of 23rd Avenue · Structure no. 09203

Built
1927
98 years old, rebuilt 1983
Condition
Fair
inspected January 2023
Type
Slab
Concrete Continuous
Length
48 ft
3 main spans
Daily traffic
42,514
2021 count
Owner
City
City or Municipal Highway Agency

About this bridge

Indian School Road over Grand Canal is a concrete continuous slab carrying Indian School Road over Grand Canal in Maricopa County, Arizona. It was built in 1927 and reconstructed in 1983, so it is 98 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 42,514 vehicles a day, roughly 1% of them trucks, projected to reach 42,524 by 2041. The structure is 48 ft (14.6 m) long and 98 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

Location

Open in Google Maps
CarriesIndian School Road
CrossesGrand Canal
Location0.07 MI E of 23rd Avenue
RouteCity Street 0
CountyMaricopa County
StateArizona
Coordinates33.495, -112.1073
Functional classUrban Other Principal 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 geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating45.3 US tons
Inventory rating27.1 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length48 ft (14.6 m)
Longest span20 ft (6.1 m)
Deck width98 ft (29.8 m)
Roadway width84 ft (25.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic42,514 (2021)
Projected traffic42,524 by 2041
Trucks1%
Lanes on structure7
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed3.1 mi (5 km)
TollOn a free road
National Highway SystemYes

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 Indian School Road over Grand Canal built?

It was built in 1927, making it 98 years old in 2025. It was reconstructed in 1983.

What condition is Indian School Road 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 Indian School Road over Grand Canal carry?

About 42,514 vehicles per day (2021 count), of which roughly 1% are trucks.

How long is Indian School Road over Grand Canal?

The structure is 48 ft (14.6 m) long with a longest span of 20 ft (6.1 m) and a deck 98 ft wide.

Who owns Indian School Road over Grand Canal?

It is owned by the City or Municipal Highway Agency.