US Bridges

51st Avenue over Cap Canal

FairClosed to traffic

Maricopa County, Arizona · 1.80 MI N of Happy Valley · Structure no. 08582

Built
1979
46 years old
Condition
Fair
inspected November 2022
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
92 ft
1 main span
Daily traffic
5
2020 count
Owner
City
City or Municipal Highway Agency

About this bridge

51st Avenue over Cap Canal is a prestressed concrete stringer/multi-beam or girder carrying 51st Avenue over Cap Canal in Maricopa County, Arizona. It was built in 1979, so it is 46 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. Its operating status is: closed to all traffic.

It carries about 5 vehicles a day, projected to reach 15 by 2040. The structure is 92 ft (28 m) long and 86 ft wide.

Carries51st Avenue
CrossesCap Canal
Location1.80 MI N of Happy Valley
RouteState Lands Road 0
StateArizona
Coordinates33.7355, -112.1699
Functional classUrban Local

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 statusClosed to all traffic
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 alignment6: Equal to present minimum criteria
Operating rating51.4 US tons
Inventory rating37 US tons

Structure

MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20
Structure length92 ft (28 m)
Longest span91 ft (27.7 m)
Deck width86 ft (26.3 m)
Roadway width70 ft (21.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic5 (2020)
Projected traffic15 by 2040
Trucks0%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed—
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 51st Avenue over Cap Canal built?

It was built in 1979, making it 46 years old in 2025.

What condition is 51st Avenue 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 51st Avenue over Cap Canal carry?

About 5 vehicles per day (2020 count).

How long is 51st Avenue over Cap Canal?

The structure is 92 ft (28 m) long with a longest span of 91 ft (27.7 m) and a deck 86 ft wide.

Who owns 51st Avenue over Cap Canal?

It is owned by the City or Municipal Highway Agency.