US Bridges

Mill Ave over US 60

Fair

Maricopa County, Arizona · 1.65 MI E JCT I 10 · Structure no. 01393

Built
1970
55 years old
Condition
Fair
inspected November 2023
Type
Box Beam or Girders - Single or Spread
Concrete Continuous
Length
193 ft
2 main spans
Daily traffic
33,902
2019 count
Owner
State
State Highway Agency

About this bridge

Mill Ave over US 60 is a concrete continuous box beam or girders - single or spread carrying Mill Ave over US 60 in Maricopa County, Arizona. It was built in 1970, so it is 55 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 33,902 vehicles a day, roughly 1% of them trucks, projected to reach 33,912 by 2039. The structure is 193 ft (58.8 m) long and 89 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesMill Ave
CrossesUS 60
Location1.65 MI E JCT I 10
RouteCity Street 0
CountyMaricopa County
StateArizona
Coordinates33.3853, -111.9395
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
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionNovember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry2: Basically intolerable, requiring high priority of replacement
Approach roadway alignment8: Equal to present desirable criteria
Operating rating99 US tons
Inventory rating72 US tons

Structure

Structure typeBox Beam or Girders - Single or Spread
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans2
Design loadHS 20
Structure length193 ft (58.8 m)
Longest span94 ft (28.7 m)
Deck width89 ft (27 m)
Roadway width72 ft (21.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic33,902 (2019)
Projected traffic33,912 by 2039
Trucks1%
Lanes on structure7
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesHighway
Detour if closed1.2 mi (2 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$2,000
NavigationNot applicable (no waterway)

Frequently asked questions

When was Mill Ave over US 60 built?

It was built in 1970, making it 55 years old in 2025.

What condition is Mill Ave over US 60 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 Mill Ave over US 60 carry?

About 33,902 vehicles per day (2019 count), of which roughly 1% are trucks.

How long is Mill Ave over US 60?

The structure is 193 ft (58.8 m) long with a longest span of 94 ft (28.7 m) and a deck 89 ft wide.

Who owns Mill Ave over US 60?

It is owned by the State Highway Agency.