US Bridges

11 Mile Corner RD over Casa Grande Canal

Fair

Pinal County, Arizona · 1.1 MI S JCT SR 287 · Structure no. 09502

Built
1976
49 years old
Condition
Fair
inspected January 2024
Type
Box Beam or Girders - Multiple
Prestressed Concrete
Length
26 ft
1 main span
Daily traffic
3,410
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 1976, so it is 49 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 3,410 vehicles a day, roughly 5% of them trucks, projected to reach 3,420 by 2042. The structure is 26 ft (7.9 m) long and 36 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

Location

Open in Google Maps
Carries11 Mile Corner RD
CrossesCasa Grande Canal
Location1.1 MI S JCT SR 287
RouteCounty Highway 0
CountyPinal County
StateArizona
Coordinates32.86424, -111.56745
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 protection7 GoodSome minor problems.
Last inspectionJanuary 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
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 rating99 US tons
Inventory rating61 US tons

Structure

Structure typeBox Beam or Girders - Multiple
MaterialPrestressed Concrete
DeckConcrete, precast panels
Main spans1
Design loadHS 20
Structure length26 ft (7.9 m)
Longest span25 ft (7.6 m)
Deck width36 ft (11.1 m)
Roadway width35 ft (10.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic3,410 (2022)
Projected traffic3,420 by 2042
Trucks5%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.7 mi (6 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 1976, making it 49 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 3,410 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 26 ft (7.9 m) long with a longest span of 25 ft (7.6 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.