US Bridges

US 70 over San Jose Canyon

Fair

Graham County, Arizona · 32.7 MI W JCT SR 75 · Structure no. 04319

Built
1953
72 years old
Condition
Fair
inspected November 2023
Type
Culvert
Concrete Continuous
Length
25 ft
2 main spans
Daily traffic
6,201
2022 count
Owner
State
State Highway Agency

About this bridge

US 70 over San Jose Canyon is a concrete continuous culvert carrying US 70 over San Jose Canyon in Graham County, Arizona. It was built in 1953, 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 6 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 6,201 vehicles a day, roughly 12% of them trucks, projected to reach 6,211 by 2042. The structure is 25 ft (7.6 m) long and 47 ft wide. If it were closed, the detour would be 21.7 mi (35 km).

Location

Open in Google Maps
CarriesUS 70
CrossesSan Jose Canyon
Location32.7 MI W JCT SR 75
RouteU.S. Route 70
CountyGraham County
StateArizona
Coordinates32.8128, -109.6007
Functional classUrban Minor Arterial

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 protection7 GoodSome minor problems.
Culvert6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionNovember 2023
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry9: Superior to present desirable criteria
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating65 US tons
Inventory rating38 US tons

Structure

Structure typeCulvert
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans2
Design loadHS 20
Structure length25 ft (7.6 m)
Longest span12 ft (3.7 m)
Deck width47 ft (14.3 m)
Roadway width45 ft (13.7 m)
Vertical clearance over deck30 ft (9.1 m)

Traffic and service

Average daily traffic6,201 (2022)
Projected traffic6,211 by 2042
Trucks12%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed21.7 mi (35 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 US 70 over San Jose Canyon built?

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

What condition is US 70 over San Jose 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 November 2023.

How much traffic does US 70 over San Jose Canyon carry?

About 6,201 vehicles per day (2022 count), of which roughly 12% are trucks.

How long is US 70 over San Jose Canyon?

The structure is 25 ft (7.6 m) long with a longest span of 12 ft (3.7 m) and a deck 47 ft wide.

Who owns US 70 over San Jose Canyon?

It is owned by the State Highway Agency.