US Bridges

US 70 over Stockton Wash

Fair

Graham County, Arizona · 38.2 MI W JCT SR 75 · Structure no. 04318

Built
1950
75 years old
Condition
Fair
inspected November 2023
Type
Culvert
Concrete Continuous
Length
45 ft
3 main spans
Daily traffic
8,642
2022 count
Owner
State
State Highway Agency

About this bridge

US 70 over Stockton Wash is a concrete continuous culvert carrying US 70 over Stockton Wash in Graham County, Arizona. It was built in 1950, so it is 75 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 8,642 vehicles a day, roughly 11% of them trucks, projected to reach 8,652 by 2042. The structure is 45 ft (13.7 m) long and 114 ft wide. If it were closed, the detour would be 21.7 mi (35 km).

Location

Open in Google Maps
CarriesUS 70
CrossesStockton Wash
Location38.2 MI W JCT SR 75
RouteU.S. Route 70
CountyGraham County
StateArizona
Coordinates32.8242, -109.6902
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 adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating59 US tons
Inventory rating35.1 US tons

Structure

Structure typeCulvert
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length45 ft (13.7 m)
Longest span10 ft (3 m)
Deck width114 ft (34.7 m)
Roadway width63 ft (19.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic8,642 (2022)
Projected traffic8,652 by 2042
Trucks11%
Lanes on structure3
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
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 Stockton Wash built?

It was built in 1950, making it 75 years old in 2025.

What condition is US 70 over Stockton Wash 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 Stockton Wash carry?

About 8,642 vehicles per day (2022 count), of which roughly 11% are trucks.

How long is US 70 over Stockton Wash?

The structure is 45 ft (13.7 m) long with a longest span of 10 ft (3 m) and a deck 114 ft wide.

Who owns US 70 over Stockton Wash?

It is owned by the State Highway Agency.