US Bridges

275th Avenue over Cap Canal

Good

Maricopa County, Arizona · 1.3 MI N of Sun Vly Pkwy · Structure no. 08645

Built
1981
44 years old
Condition
Good
inspected December 2024
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
90 ft
1 main span
Daily traffic
15
2022 count
Owner
Town / Township
Town or Township Highway Agency

About this bridge

275th Avenue over Cap Canal is a prestressed concrete stringer/multi-beam or girder carrying 275th Avenue over Cap Canal in Maricopa County, Arizona. It was built in 1981, so it is 44 years old, younger than the Arizona average of 47.8 years.

The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 15 vehicles a day, roughly 3% of them trucks, projected to reach 25 by 2042. The structure is 90 ft (27.4 m) long and 39 ft wide. If it were closed, the detour would be 6.8 mi (11 km).

Location

Open in Google Maps
Carries275th Avenue
CrossesCap Canal
Location1.3 MI N of Sun Vly Pkwy
RouteCity Street 0
CountyMaricopa County
StateArizona
Coordinates33.67692, -112.64314
Functional classRural Local

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure8 Very GoodNo problems noted.
Substructure8 Very GoodNo problems noted.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionDecember 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation8: Equal to present desirable criteria
Deck geometry9: Superior to present desirable criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating60 US tons
Inventory rating36 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20
Structure length90 ft (27.4 m)
Longest span88 ft (26.8 m)
Deck width39 ft (11.8 m)
Roadway width36 ft (11 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic15 (2022)
Projected traffic25 by 2042
Trucks3%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed6.8 mi (11 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerTown or Township Highway Agency
Maintained byTown or Township 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 275th Avenue over Cap Canal built?

It was built in 1981, making it 44 years old in 2025.

What condition is 275th Avenue over Cap Canal in?

The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in December 2024.

How much traffic does 275th Avenue over Cap Canal carry?

About 15 vehicles per day (2022 count), of which roughly 3% are trucks.

How long is 275th Avenue over Cap Canal?

The structure is 90 ft (27.4 m) long with a longest span of 88 ft (26.8 m) and a deck 39 ft wide.

Who owns 275th Avenue over Cap Canal?

It is owned by the Town or Township Highway Agency.