US Bridges

56th Street over Cap Canal

Fair

Maricopa County, Arizona · 0.68 MI N of Bell Road · Structure no. 10142

Built
1998
27 years old
Condition
Fair
inspected November 2022
Type
Stringer/Multi-beam or Girder
Prestressed Concrete Continuous
Length
264 ft
3 main spans
Daily traffic
18,598
2019 count
Owner
City
City or Municipal Highway Agency

About this bridge

56th Street over Cap Canal is a prestressed concrete continuous stringer/multi-beam or girder carrying 56th Street over Cap Canal in Maricopa County, Arizona. It was built in 1998, so it is 27 years old, younger 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 18,598 vehicles a day, roughly 5% of them trucks, projected to reach 18,608 by 2039. The structure is 264 ft (80.6 m) long and 90 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

Carries56th Street
CrossesCap Canal
Location0.68 MI N of Bell Road
RouteCity Street 0
StateArizona
Coordinates33.6502, -111.9591
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.
Superstructure7 GoodSome minor problems.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionNovember 2022
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry9: Superior to present desirable criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating51 US tons
Inventory rating29.7 US tons

Structure

MaterialPrestressed Concrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length264 ft (80.6 m)
Longest span100 ft (30.5 m)
Deck width90 ft (27.4 m)
Roadway width67 ft (20.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic18,598 (2019)
Projected traffic18,608 by 2039
Trucks5%
Lanes on structure4
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed3.7 mi (6 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—
NavigationNot applicable (no waterway)

Frequently asked questions

When was 56th Street over Cap Canal built?

It was built in 1998, making it 27 years old in 2025.

What condition is 56th Street over Cap 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 November 2022.

How much traffic does 56th Street over Cap Canal carry?

About 18,598 vehicles per day (2019 count), of which roughly 5% are trucks.

How long is 56th Street over Cap Canal?

The structure is 264 ft (80.6 m) long with a longest span of 100 ft (30.5 m) and a deck 90 ft wide.

Who owns 56th Street over Cap Canal?

It is owned by the City or Municipal Highway Agency.