US Bridges

IRR US 70 over Ash Creek

Fair

Graham County, Arizona · 60.0 MI E JCT SR 170 · Structure no. 04316

Built
1948
77 years old, rebuilt 2002
Condition
Fair
inspected November 2023
Type
Culvert
Concrete Continuous
Length
29 ft
2 main spans
Daily traffic
8,534
2022 count
Owner
State
State Highway Agency

About this bridge

IRR US 70 over Ash Creek is a concrete continuous culvert carrying IRR US 70 over Ash Creek in Graham County, Arizona. It was built in 1948 and reconstructed in 2002, so it is 77 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 8,534 vehicles a day, roughly 17% of them trucks, projected to reach 8,544 by 2042. The structure is 29 ft (8.8 m) long. If it were closed, the detour would be 1.9 mi (3 km).

Location

Open in Google Maps
CarriesIRR US 70
CrossesAsh Creek
Location60.0 MI E JCT SR 170
RouteU.S. Route 70
CountyGraham County
StateArizona
Coordinates32.8942, -109.8211
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 protection6 SatisfactoryStructural elements show some minor deterioration.
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
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating99 US tons
Inventory rating99 US tons

Structure

Structure typeCulvert
MaterialConcrete Continuous
DeckNot applicable
Main spans2
Design loadHS 20
Structure length29 ft (8.8 m)
Longest span10 ft (3 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic8,534 (2022)
Projected traffic8,544 by 2042
Trucks17%
Lanes on structure5
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed1.9 mi (3 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 IRR US 70 over Ash Creek built?

It was built in 1948, making it 77 years old in 2025. It was reconstructed in 2002.

What condition is IRR US 70 over Ash Creek 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 IRR US 70 over Ash Creek carry?

About 8,534 vehicles per day (2022 count), of which roughly 17% are trucks.

How long is IRR US 70 over Ash Creek?

The structure is 29 ft (8.8 m) long with a longest span of 10 ft (3 m).

Who owns IRR US 70 over Ash Creek?

It is owned by the State Highway Agency.