US Bridges

US 60 over Mcmillen Wash

Fair

Gila County, Arizona · 0.2 MI W JCT US 70 · Structure no. 01028

Built
1930
95 years old, rebuilt 1937
Condition
Fair
inspected October 2024
Type
Tee Beam
Concrete Continuous
Length
101 ft
6 main spans
Daily traffic
16,297
2024 count
Owner
State
State Highway Agency

About this bridge

US 60 over Mcmillen Wash is a concrete continuous tee beam carrying US 60 over Mcmillen Wash in Gila County, Arizona. It was built in 1930 and reconstructed in 1937, so it is 95 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 5 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 16,297 vehicles a day, roughly 9% of them trucks, projected to reach 16,307 by 2042. The structure is 101 ft (30.8 m) long and 75 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

Open in Google Maps
CarriesUS 60
CrossesMcmillen Wash
Location0.2 MI W JCT US 70
RouteU.S. Route 60
CountyGila County
StateArizona
Coordinates33.395, -110.769
Functional classUrban Other Principal 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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionOctober 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry7: Better than present minimum criteria
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating57 US tons
Inventory rating34 US tons

Structure

Structure typeTee Beam
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans6
Design loadHS 20
Structure length101 ft (30.8 m)
Longest span17 ft (5.2 m)
Deck width75 ft (23 m)
Roadway width64 ft (19.5 m)
Vertical clearance over deck25 ft (7.6 m)

Traffic and service

Average daily traffic16,297 (2024)
Projected traffic16,307 by 2042
Trucks9%
Lanes on structure4
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed1.9 mi (3 km)
TollOn a free road
National Highway SystemYes

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 60 over Mcmillen Wash built?

It was built in 1930, making it 95 years old in 2025. It was reconstructed in 1937.

What condition is US 60 over Mcmillen 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 60 over Mcmillen Wash carry?

About 16,297 vehicles per day (2024 count), of which roughly 9% are trucks.

How long is US 60 over Mcmillen Wash?

The structure is 101 ft (30.8 m) long with a longest span of 17 ft (5.2 m) and a deck 75 ft wide.

Who owns US 60 over Mcmillen Wash?

It is owned by the State Highway Agency.