US Bridges

IRR US 70 over Wash

Fair

Graham County, Arizona · 37.0 MI E SR 170 · Structure no. 04311

Built
1932
93 years old, rebuilt 1959
Condition
Fair
inspected November 2023
Type
Culvert
Concrete Continuous
Length
21 ft
2 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 1932 and reconstructed in 1959, so it is 93 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 21 ft (6.4 m) long and 46 ft wide. If it were closed, the detour would be 98.8 mi (159 km).

Location

Open in Google Maps
CarriesIRR US 70
CrossesWash
Location37.0 MI E SR 170
RouteU.S. Route 70
CountyGraham County
StateArizona
Coordinates33.01647, -109.95256
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 protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
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 geometry6: Equal to present minimum criteria
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating58 US tons
Inventory rating36 US tons

Structure

Structure typeCulvert
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans2
Design loadH 15
Structure length21 ft (6.4 m)
Longest span10 ft (3 m)
Deck width46 ft (13.9 m)
Roadway width44 ft (13.3 m)
Vertical clearance over deckUnrestricted

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 proposedWidening of existing bridge without deck rehabilitation
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 1932, making it 93 years old in 2025. It was reconstructed in 1959.

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 21 ft (6.4 m) long with a longest span of 10 ft (3 m) and a deck 46 ft wide.

Who owns IRR US 70 over Wash?

It is owned by the State Highway Agency.