US Bridges

Box Canyon over Box Canyon

Fair

Pima County, Arizona · .9 MI Sw/O Basin Spring · Structure no. 030502000003263

Built
1954
71 years old
Condition
Fair
inspected April 2024
Type
Slab
Concrete
Length
80 ft
3 main spans
Daily traffic
80
2022 count
Owner
Federal
U.S. Forest Service

About this bridge

Box Canyon over Box Canyon is a concrete slab carrying Box Canyon over Box Canyon in Pima County, Arizona. It was built in 1954, so it is 71 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 80 vehicles a day, projected to reach 125 by 2040. The structure is 80 ft (24.4 m) long and 16 ft wide. If it were closed, the detour would be 19.9 mi (32 km).

Location

Open in Google Maps
CarriesBox Canyon
CrossesBox Canyon
Location.9 MI Sw/O Basin Spring
RouteFederal Lands Road 62
CountyPima County
StateArizona
Coordinates31.79922, -110.79746
Functional classRural Local

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.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionApril 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment3: Basically intolerable, requiring high priority of corrective action
Operating rating23.9 US tons
Inventory rating18.5 US tons

Structure

Structure typeSlab
MaterialConcrete
DeckConcrete, cast-in-place
Main spans3
Design loadH 15
Structure length80 ft (24.4 m)
Longest span26 ft (8 m)
Deck width16 ft (5 m)
Roadway width14 ft (4.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic80 (2022)
Projected traffic125 by 2040
Trucks—
Lanes on structure1
Traffic directionOne-lane bridge for two-way traffic
CarriesHighway
CrossesWaterway
Detour if closed19.9 mi (32 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerU.S. Forest Service
Maintained byU.S. Forest Service
Historic statusHistorical significance not determinable at this time
Work proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$430,000
NavigationNo navigation control on waterway

Frequently asked questions

When was Box Canyon over Box Canyon built?

It was built in 1954, making it 71 years old in 2025.

What condition is Box Canyon over Box Canyon 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 April 2024.

How much traffic does Box Canyon over Box Canyon carry?

About 80 vehicles per day (2022 count).

How long is Box Canyon over Box Canyon?

The structure is 80 ft (24.4 m) long with a longest span of 26 ft (8 m) and a deck 16 ft wide.

Who owns Box Canyon over Box Canyon?

It is owned by the U.S. Forest Service.