US Bridges

11 Mile Corner RD over Casa Grande Canal

Fair

Pinal County, Arizona · 0.3 MI N JCT Selma HWY · Structure no. 09086

Built
1972
53 years old
Condition
Fair
inspected January 2024
Type
Box Beam or Girders - Multiple
Prestressed Concrete
Length
36 ft
1 main span
Daily traffic
2,324
2022 count
Owner
County
County Highway Agency

About this bridge

11 Mile Corner RD over Casa Grande Canal is a prestressed concrete box beam or girders - multiple carrying 11 Mile Corner RD over Casa Grande Canal in Pinal County, Arizona. It was built in 1972, so it is 53 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 2,324 vehicles a day, roughly 5% of them trucks, projected to reach 2,334 by 2042. The structure is 36 ft (11 m) long and 36 ft wide. If it were closed, the detour would be 9.9 mi (16 km).

Location

Open in Google Maps
Carries11 Mile Corner RD
CrossesCasa Grande Canal
Location0.3 MI N JCT Selma HWY
RouteCounty Highway 0
CountyPinal County
StateArizona
Coordinates32.85464, -111.56754
Functional classRural Major Collector

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 protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionJanuary 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating41 US tons
Inventory rating24 US tons

Structure

Structure typeBox Beam or Girders - Multiple
MaterialPrestressed Concrete
DeckConcrete, precast panels
Main spans1
Design loadHS 20
Structure length36 ft (11 m)
Longest span34 ft (10.4 m)
Deck width36 ft (11.1 m)
Roadway width34 ft (10.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic2,324 (2022)
Projected traffic2,334 by 2042
Trucks5%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed9.9 mi (16 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCounty Highway Agency
Maintained byCounty 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 11 Mile Corner RD over Casa Grande Canal built?

It was built in 1972, making it 53 years old in 2025.

What condition is 11 Mile Corner RD over Casa Grande 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 2024.

How much traffic does 11 Mile Corner RD over Casa Grande Canal carry?

About 2,324 vehicles per day (2022 count), of which roughly 5% are trucks.

How long is 11 Mile Corner RD over Casa Grande Canal?

The structure is 36 ft (11 m) long with a longest span of 34 ft (10.4 m) and a deck 36 ft wide.

Who owns 11 Mile Corner RD over Casa Grande Canal?

It is owned by the County Highway Agency.