US Bridges

SR 87 over Casa Grande Canal Ext

Fair

Pinal County, Arizona · 1.9 MI South JCT SR 287 · Structure no. 04627

Built
1953
72 years old, rebuilt 1961
Condition
Fair
inspected February 2024
Type
Culvert
Concrete Continuous
Length
25 ft
2 main spans
Daily traffic
6,063
2022 count
Owner
State
State Highway Agency

About this bridge

SR 87 over Casa Grande Canal Ext is a concrete continuous culvert carrying SR 87 over Casa Grande Canal Ext in Pinal County, Arizona. It was built in 1953 and reconstructed in 1961, so it is 72 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 5 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 6,063 vehicles a day, roughly 11% of them trucks, projected to reach 13,905 by 2042. The structure is 25 ft (7.6 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 Ext
Location1.9 MI South JCT SR 287
RouteState Highway 87
CountyPinal County
StateArizona
Coordinates32.8512, -111.5153
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
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Culvert5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionFebruary 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
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating69 US tons
Inventory rating41 US tons

Structure

Structure typeCulvert
MaterialConcrete Continuous
DeckNot applicable
Main spans2
Design loadHS 20
Structure length25 ft (7.6 m)
Longest span12 ft (3.7 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic6,063 (2022)
Projected traffic13,905 by 2042
Trucks11%
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 proposedRehabilitation because of general structure deterioration or inadequate strength
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was SR 87 over Casa Grande Canal Ext built?

It was built in 1953, making it 72 years old in 2025. It was reconstructed in 1961.

What condition is SR 87 over Casa Grande Canal Ext 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 February 2024.

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

About 6,063 vehicles per day (2022 count), of which roughly 11% are trucks.

How long is SR 87 over Casa Grande Canal Ext?

The structure is 25 ft (7.6 m) long with a longest span of 12 ft (3.7 m).

Who owns SR 87 over Casa Grande Canal Ext?

It is owned by the State Highway Agency.