US Bridges

IRR Casa Blanca over I-10

Fair

Pinal County, Arizona · 9.5 MI NW JCT SR 187 · Structure no. 01214

Built
1967
58 years old
Condition
Fair
inspected August 2024
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
298 ft
4 main spans
Daily traffic
11,577
2022 count
Owner
State
State Highway Agency

About this bridge

IRR Casa Blanca over I-10 is a steel continuous stringer/multi-beam or girder carrying IRR Casa Blanca over I-10 in Pinal County, Arizona. It was built in 1967, so it is 58 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 11,577 vehicles a day, roughly 13% of them trucks, projected to reach 11,587 by 2042. The structure is 298 ft (90.8 m) long and 35 ft wide. If it were closed, the detour would be 6.2 mi (10 km).

Location

Open in Google Maps
CarriesIRR Casa Blanca
CrossesI-10
Location9.5 MI NW JCT SR 187
RouteState Highway 587
CountyPinal County
StateArizona
Coordinates33.1175, -111.8422
Functional classRural Minor Arterial

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.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionAugust 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation6: Equal to present minimum criteria
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Approach roadway alignment6: Equal to present minimum criteria
Operating rating58 US tons
Inventory rating36 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans4
Design loadHS 20
Structure length298 ft (90.8 m)
Longest span95 ft (29 m)
Deck width35 ft (10.7 m)
Roadway width31 ft (9.4 m)
Vertical clearance over deck35 ft (10.7 m)

Traffic and service

Average daily traffic11,577 (2022)
Projected traffic11,587 by 2042
Trucks13%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesHighway
Detour if closed6.2 mi (10 km)
TollOn a free road
National Highway SystemYes

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedWidening with deck rehabilitation or replacement
Estimated improvement cost—
NavigationNot applicable (no waterway)

Frequently asked questions

When was IRR Casa Blanca over I-10 built?

It was built in 1967, making it 58 years old in 2025.

What condition is IRR Casa Blanca over I-10 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 August 2024.

How much traffic does IRR Casa Blanca over I-10 carry?

About 11,577 vehicles per day (2022 count), of which roughly 13% are trucks.

How long is IRR Casa Blanca over I-10?

The structure is 298 ft (90.8 m) long with a longest span of 95 ft (29 m) and a deck 35 ft wide.

Who owns IRR Casa Blanca over I-10?

It is owned by the State Highway Agency.