US 180 over Milky Wash

Fair

Apache County, Arizona · 26.8 MI NW JCT SR 61 · Structure no. 01551

Built: 1971; 54 years old
Condition: Fair; inspected October 2024
Type: Slab; Concrete Continuous
Length: 129 ft; 4 main spans
Daily traffic: 418; 2022 count
Owner: State; State Highway Agency

About this bridge

US 180 over Milky Wash is a concrete continuous slab carrying US 180 over Milky Wash in Apache County, Arizona. It was built in 1971, so it is 54 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 418 vehicles a day, roughly 18% of them trucks, projected to reach 428 by 2042. The structure is 129 ft (39.3 m) long and 47 ft wide. If it were closed, the detour would be 51 mi (82 km).

Location

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CarriesUS 180

CrossesMilky Wash

Location26.8 MI NW JCT SR 61

RouteU.S. Route 180

CountyApache County

StateArizona

Coordinates34.74447, -109.79582

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.

Component	Rating	Meaning
Deck	6 Satisfactory	Structural elements show some minor deterioration.
Superstructure	6 Satisfactory	Structural elements show some minor deterioration.
Substructure	6 Satisfactory	Structural elements show some minor deterioration.
Channel and channel protection	5 Fair	All primary structural elements are sound but may have minor section loss, cracking, spalling or scour.

Last inspectionOctober 2024

Inspection intervalevery 24 months

Operating statusOpen, no restriction

ScourCountermeasures installed to correct a previously existing problem

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 rating64 US tons

Inventory rating38 US tons

Structure

Structure typeSlab

MaterialConcrete Continuous

DeckConcrete, cast-in-place

Main spans4

Design loadHS 20

Structure length129 ft (39.3 m)

Longest span35 ft (10.7 m)

Deck width47 ft (14.2 m)

Roadway width44 ft (13.4 m)

Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic418 (2022)

Projected traffic428 by 2042

Trucks18%

Lanes on structure2

Traffic directionTwo-way traffic

CarriesHighway

CrossesWaterway

Detour if closed51 mi (82 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 180 over Milky Wash built?

It was built in 1971, making it 54 years old in 2025.

What condition is US 180 over Milky 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 October 2024.

How much traffic does US 180 over Milky Wash carry?

About 418 vehicles per day (2022 count), of which roughly 18% are trucks.

How long is US 180 over Milky Wash?

The structure is 129 ft (39.3 m) long with a longest span of 35 ft (10.7 m) and a deck 47 ft wide.

Who owns US 180 over Milky Wash?

It is owned by the State Highway Agency.