US Bridges

Butte Ave over Florence-Casa Gr Canal

FairPosted for load

Pinal County, Arizona · 1.5 MI E JCT SR 79 · Structure no. 08215

Built
1936
89 years old
Condition
Fair
inspected February 2024
Type
Tee Beam
Concrete
Length
53 ft
2 main spans
Daily traffic
1,861
2022 count
Owner
City
City or Municipal Highway Agency

About this bridge

Butte Ave over Florence-Casa Gr Canal is a concrete tee beam carrying Butte Ave over Florence-Casa Gr Canal in Pinal County, Arizona. It was built in 1936, so it is 89 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. Its operating status is: posted for load restriction.

It carries about 1,861 vehicles a day, roughly 5% of them trucks, projected to reach 1,871 by 2042. The structure is 53 ft (16.2 m) long and 23 ft wide. If it were closed, the detour would be 5 mi (8 km).

Location

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CarriesButte Ave
CrossesFlorence-Casa Gr Canal
Location1.5 MI E JCT SR 79
RouteCity Street 0
CountyPinal County
StateArizona
Coordinates33.0335, -111.35408
Functional classUrban 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
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection7 GoodSome minor problems.
Last inspectionFebruary 2024
Inspection intervalevery 24 months
Operating statusPosted for load restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation4: Meets minimum tolerable limits to be left in place as is
Deck geometry2: Basically intolerable, requiring high priority of replacement
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating29 US tons
Inventory rating17 US tons

Structure

Structure typeTee Beam
MaterialConcrete
DeckConcrete, cast-in-place
Main spans2
Design loadHS 15
Structure length53 ft (16.2 m)
Longest span26 ft (7.9 m)
Deck width23 ft (6.9 m)
Roadway width20 ft (6.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,861 (2022)
Projected traffic1,871 by 2042
Trucks5%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed5 mi (8 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCity or Municipal Highway Agency
Maintained byCity or Municipal Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$1,000 (2024 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Butte Ave over Florence-Casa Gr Canal built?

It was built in 1936, making it 89 years old in 2025.

What condition is Butte Ave over Florence-Casa Gr 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 February 2024.

How much traffic does Butte Ave over Florence-Casa Gr Canal carry?

About 1,861 vehicles per day (2022 count), of which roughly 5% are trucks.

How long is Butte Ave over Florence-Casa Gr Canal?

The structure is 53 ft (16.2 m) long with a longest span of 26 ft (7.9 m) and a deck 23 ft wide.

Who owns Butte Ave over Florence-Casa Gr Canal?

It is owned by the City or Municipal Highway Agency.