US Bridges

IRR SR 187 over Canal

Good

Pinal County, Arizona · 4.2 MI N JCT I-10 · Structure no. 02356

Built
1991
34 years old
Condition
Good
inspected February 2024
Type
Box Beam or Girders - Multiple
Prestressed Concrete
Length
49 ft
1 main span
Daily traffic
4,456
2022 count
Owner
State
State Highway Agency

About this bridge

IRR SR 187 over Canal is a prestressed concrete box beam or girders - multiple carrying IRR SR 187 over Canal in Pinal County, Arizona. It was built in 1991, so it is 34 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 4,456 vehicles a day, roughly 25% of them trucks, projected to reach 11,589 by 2042. The structure is 49 ft (14.9 m) long and 48 ft wide. If it were closed, the detour would be 9.9 mi (16 km).

CarriesIRR SR 187
CrossesCanal
Location4.2 MI N JCT I-10
RouteState Highway 187
StateArizona
Coordinates33.0495, -111.7109
Functional classRural Major Collector

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 geometry9: Superior to present desirable criteria
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating97 US tons
Inventory rating58 US tons

Structure

MaterialPrestressed Concrete
DeckConcrete, precast panels
Main spans1
Design loadHS 20
Structure length49 ft (14.9 m)
Longest span45 ft (13.7 m)
Deck width48 ft (14.6 m)
Roadway width46 ft (13.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic4,456 (2022)
Projected traffic11,589 by 2042
Trucks25%
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

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 IRR SR 187 over Canal built?

It was built in 1991, making it 34 years old in 2025.

What condition is IRR SR 187 over 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 IRR SR 187 over Canal carry?

About 4,456 vehicles per day (2022 count), of which roughly 25% are trucks.

How long is IRR SR 187 over Canal?

The structure is 49 ft (14.9 m) long with a longest span of 45 ft (13.7 m) and a deck 48 ft wide.

Who owns IRR SR 187 over Canal?

It is owned by the State Highway Agency.