US Bridges

US 60 over Signal Butte Road

Fair

Maricopa County, Arizona · 21.4 MI E JCT I-10 · Structure no. 02064

Built
1990
35 years old
Condition
Fair
inspected October 2023
Type
Box Beam or Girders - Single or Spread
Prestressed Concrete
Length
165 ft
1 main span
Daily traffic
114,844
2022 count
Owner
State
State Highway Agency

About this bridge

US 60 over Signal Butte Road is a prestressed concrete box beam or girders - single or spread carrying US 60 over Signal Butte Road in Maricopa County, Arizona. It was built in 1990, so it is 35 years old, younger 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 114,844 vehicles a day, roughly 7% of them trucks, projected to reach 114,854 by 2042. The structure is 165 ft (50.3 m) long and 121 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

Location

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CarriesUS 60
CrossesSignal Butte Road
Location21.4 MI E JCT I-10
RouteU.S. Route 60
CountyMaricopa County
StateArizona
Coordinates33.3866, -111.5983
Functional classUrban Principal Arterial - Other Freeway or Expressway

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionOctober 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation6: Equal to present minimum criteria
Deck geometry9: Superior to present desirable criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating94 US tons
Inventory rating55 US tons

Structure

Structure typeBox Beam or Girders - Single or Spread
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20
Structure length165 ft (50.3 m)
Longest span160 ft (48.8 m)
Deck width121 ft (36.9 m)
Roadway width116 ft (35.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic114,844 (2022)
Projected traffic114,854 by 2042
Trucks7%
Lanes on structure4
Traffic directionTwo-way traffic
CarriesOverpass structure at an interchange
CrossesHighway
Detour if closed3.1 mi (5 km)
TollOn a free road
National Highway SystemYes
Strategic Highway NetworkInterstate STRAHNET route

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 Signal Butte Road built?

It was built in 1990, making it 35 years old in 2025.

What condition is US 60 over Signal Butte Road 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 2023.

How much traffic does US 60 over Signal Butte Road carry?

About 114,844 vehicles per day (2022 count), of which roughly 7% are trucks.

How long is US 60 over Signal Butte Road?

The structure is 165 ft (50.3 m) long with a longest span of 160 ft (48.8 m) and a deck 121 ft wide.

Who owns US 60 over Signal Butte Road?

It is owned by the State Highway Agency.