US Bridges

L 303 over US 60

Good

Maricopa County, Arizona · Grand Ave & BNSF Rlrd · Structure no. 02320

Built
2000
25 years old, rebuilt 2015
Condition
Good
inspected July 2024
Type
Box Beam or Girders - Multiple
Prestressed Concrete Continuous
Length
536 ft
4 main spans
Daily traffic
27,486
2021 count
Owner
State
State Highway Agency

About this bridge

L 303 over US 60 is a prestressed concrete continuous box beam or girders - multiple carrying L 303 over US 60 in Maricopa County, Arizona. It was built in 2000 and reconstructed in 2015, so it is 25 years old, younger than the Arizona average of 47.8 years.

The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 27,486 vehicles a day, roughly 10% of them trucks, projected to reach 27,496 by 2041. The structure is 536 ft (163.4 m) long and 197 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

CarriesL 303
CrossesUS 60
LocationGrand Ave & BNSF Rlrd
RouteState Highway 303
StateArizona
Coordinates33.6801, -112.4042
Functional classUrban Principal Arterial - Other Freeway or Expressway

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Last inspectionJuly 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation7: Better than present minimum criteria
Deck geometry9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating65 US tons
Inventory rating36 US tons

Structure

MaterialPrestressed Concrete Continuous
DeckConcrete, cast-in-place
Main spans4
Design loadHS 20
Structure length536 ft (163.4 m)
Longest span194 ft (59.1 m)
Deck width197 ft (60.1 m)
Roadway width192 ft (58.5 m)
Vertical clearance over deck25 ft (7.6 m)

Traffic and service

Average daily traffic27,486 (2021)
Projected traffic27,496 by 2041
Trucks10%
Lanes on structure8
Traffic directionTwo-way traffic
CarriesHighway
CrossesHighway and railroad
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—
NavigationNot applicable (no waterway)

Frequently asked questions

When was L 303 over US 60 built?

It was built in 2000, making it 25 years old in 2025. It was reconstructed in 2015.

What condition is L 303 over US 60 in?

The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in July 2024.

How much traffic does L 303 over US 60 carry?

About 27,486 vehicles per day (2021 count), of which roughly 10% are trucks.

How long is L 303 over US 60?

The structure is 536 ft (163.4 m) long with a longest span of 194 ft (59.1 m) and a deck 197 ft wide.

Who owns L 303 over US 60?

It is owned by the State Highway Agency.