US Bridges

Extension Road over US 60

Fair

Maricopa County, Arizona · 6.90 MI E JCT I 10 · Structure no. 01873

Built
1978
47 years old
Condition
Fair
inspected November 2023
Type
Box Beam or Girders - Single or Spread
Prestressed Concrete Continuous
Length
238 ft
2 main spans
Daily traffic
10,618
2019 count
Owner
State
State Highway Agency

About this bridge

Extension Road over US 60 is a prestressed concrete continuous box beam or girders - single or spread carrying Extension Road over US 60 in Maricopa County, Arizona. It was built in 1978, so it is 47 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 10,618 vehicles a day, roughly 1% of them trucks, projected to reach 10,628 by 2039. The structure is 238 ft (72.5 m) long and 81 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesExtension Road
CrossesUS 60
Location6.90 MI E JCT I 10
RouteCity Street 0
CountyMaricopa County
StateArizona
Coordinates33.3856, -111.8487
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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure7 GoodSome minor problems.
Last inspectionNovember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation6: Equal to present minimum criteria
Deck geometry7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating84 US tons
Inventory rating46 US tons

Structure

Structure typeBox Beam or Girders - Single or Spread
MaterialPrestressed Concrete Continuous
DeckConcrete, cast-in-place
Main spans2
Design loadHS 20
Structure length238 ft (72.5 m)
Longest span118 ft (36 m)
Deck width81 ft (24.6 m)
Roadway width64 ft (19.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic10,618 (2019)
Projected traffic10,628 by 2039
Trucks1%
Lanes on structure4
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 proposedNone recorded
Estimated improvement cost—
NavigationNot applicable (no waterway)

Frequently asked questions

When was Extension Road over US 60 built?

It was built in 1978, making it 47 years old in 2025.

What condition is Extension Road 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 Extension Road over US 60 carry?

About 10,618 vehicles per day (2019 count), of which roughly 1% are trucks.

How long is Extension Road over US 60?

The structure is 238 ft (72.5 m) long with a longest span of 118 ft (36 m) and a deck 81 ft wide.

Who owns Extension Road over US 60?

It is owned by the State Highway Agency.