US Bridges

SR 87 over Casa Grande Canal

Good

Pinal County, Arizona · 0.8 MI S JCT SR 287 · Structure no. 04628

Built
1931
94 years old, rebuilt 1961
Condition
Good
inspected October 2021
Type
Culvert
Concrete Continuous
Length
29 ft
2 main spans
Daily traffic
5,099
2020 count
Owner
State
State Highway Agency

About this bridge

SR 87 over Casa Grande Canal is a concrete continuous culvert carrying SR 87 over Casa Grande Canal in Pinal County, Arizona. It was built in 1931 and reconstructed in 1961, so it is 94 years old, older 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 5,099 vehicles a day, roughly 12% of them trucks, projected to reach 5,109 by 2040. The structure is 29 ft (8.8 m) long. If it were closed, the detour would be 37.9 mi (61 km).

Location

Open in Google Maps
CarriesSR 87
CrossesCasa Grande Canal
Location0.8 MI S JCT SR 287
RouteState Highway 87
CountyPinal County
StateArizona
Coordinates32.8677, -111.5152
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
Channel and channel protection8 Very GoodNo problems noted.
Culvert7 GoodSome minor problems.
Last inspectionOctober 2021
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating71 US tons
Inventory rating42 US tons

Structure

Structure typeCulvert
MaterialConcrete Continuous
DeckNot applicable
Main spans2
Design loadHS 20
Structure length29 ft (8.8 m)
Longest span10 ft (3 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic5,099 (2020)
Projected traffic5,109 by 2040
Trucks12%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed37.9 mi (61 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 SR 87 over Casa Grande Canal built?

It was built in 1931, making it 94 years old in 2025. It was reconstructed in 1961.

What condition is SR 87 over Casa Grande 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 October 2021.

How much traffic does SR 87 over Casa Grande Canal carry?

About 5,099 vehicles per day (2020 count), of which roughly 12% are trucks.

How long is SR 87 over Casa Grande Canal?

The structure is 29 ft (8.8 m) long with a longest span of 10 ft (3 m).

Who owns SR 87 over Casa Grande Canal?

It is owned by the State Highway Agency.