US Bridges

I-10 WB over Cap Canal

Good

La Paz County, Arizona · 28.0 MI E JCT US 60 · Structure no. 01414

Built
1982
43 years old
Condition
Good
inspected February 2024
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
107 ft
1 main span
Daily traffic
14,125
2023 count
Owner
State
State Highway Agency

About this bridge

I-10 WB over Cap Canal is a prestressed concrete stringer/multi-beam or girder carrying I-10 WB over Cap Canal in La Paz County, Arizona. It was built in 1982, so it is 43 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 14,125 vehicles a day, roughly 30% of them trucks, projected to reach 14,135 by 2042. The structure is 107 ft (32.6 m) long and 45 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

CarriesI-10 WB
CrossesCap Canal
Location28.0 MI E JCT US 60
RouteInterstate 10
StateArizona
Coordinates33.59618, -113.5316
Functional classRural Principal Arterial - Interstate

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.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionFebruary 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Deck geometry8: Equal to present desirable criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating99 US tons
Inventory rating46 US tons

Structure

MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20
Structure length107 ft (32.6 m)
Longest span103 ft (31.4 m)
Deck width45 ft (13.8 m)
Roadway width42 ft (12.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic14,125 (2023)
Projected traffic14,135 by 2042
Trucks30%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.2 mi (2 km)
TollOn a free road
National Highway SystemYes
Strategic Highway NetworkInterstate STRAHNET route

Ownership and planned work

OwnerState Highway Agency
Maintained byState 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 I-10 WB over Cap Canal built?

It was built in 1982, making it 43 years old in 2025.

What condition is I-10 WB 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 February 2024.

How much traffic does I-10 WB over Cap Canal carry?

About 14,125 vehicles per day (2023 count), of which roughly 30% are trucks.

How long is I-10 WB over Cap Canal?

The structure is 107 ft (32.6 m) long with a longest span of 103 ft (31.4 m) and a deck 45 ft wide.

Who owns I-10 WB over Cap Canal?

It is owned by the State Highway Agency.