US Bridges

IRR US 70 over Wash

Fair

Graham County, Arizona · 44.2 MI E JCT SR 170 · Structure no. 04315

Built
1959
66 years old
Condition
Fair
inspected November 2023
Type
Culvert
Concrete Continuous
Length
32 ft
3 main spans
Daily traffic
3,521
2022 count
Owner
State
State Highway Agency

About this bridge

IRR US 70 over Wash is a concrete continuous culvert carrying IRR US 70 over Wash in Graham County, Arizona. It was built in 1959, so it is 66 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 3,521 vehicles a day, roughly 28% of them trucks, projected to reach 3,531 by 2042. The structure is 32 ft (9.8 m) long and 47 ft wide. If it were closed, the detour would be 98.8 mi (159 km).

Location

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CarriesIRR US 70
CrossesWash
Location44.2 MI E JCT SR 170
RouteU.S. Route 70
CountyGraham County
StateArizona
Coordinates32.9491, -109.9127
Functional classRural 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 rating69 US tons
Inventory rating41 US tons

Structure

Structure typeCulvert
MaterialConcrete Continuous
DeckNot applicable
Main spans3
Design loadHS 20
Structure length32 ft (9.8 m)
Longest span10 ft (3 m)
Deck width47 ft (14.3 m)
Roadway width0 ft (0 m)
Vertical clearance over deck0 ft (0 m)

Traffic and service

Average daily traffic3,521 (2022)
Projected traffic3,531 by 2042
Trucks28%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed98.8 mi (159 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 proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$1,000 (2019 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was IRR US 70 over Wash built?

It was built in 1959, making it 66 years old in 2025.

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

About 3,521 vehicles per day (2022 count), of which roughly 28% are trucks.

How long is IRR US 70 over Wash?

The structure is 32 ft (9.8 m) long with a longest span of 10 ft (3 m) and a deck 47 ft wide.

Who owns IRR US 70 over Wash?

It is owned by the State Highway Agency.