US Bridges

SR 303L over Lone Mtn Pkwy

Good

Maricopa County, Arizona · 8.7 MI N. JCT US 60 · Structure no. 02388

Built
2010
15 years old
Condition
Good
inspected February 2023
Type
Box Beam or Girders - Single or Spread
Prestressed Concrete Continuous
Length
414 ft
3 main spans
Daily traffic
6,900
2022 count
Owner
State
State Highway Agency

About this bridge

SR 303L over Lone Mtn Pkwy is a prestressed concrete continuous box beam or girders - single or spread carrying SR 303L over Lone Mtn Pkwy in Maricopa County, Arizona. It was built in 2010, so it is 15 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 8 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 6,900 vehicles a day, roughly 7% of them trucks, projected to reach 6,910 by 2042. The structure is 414 ft (126.2 m) long and 61 ft wide.

Location

Open in Google Maps
CarriesSR 303L
CrossesLone Mtn Pkwy
Location8.7 MI N. JCT US 60
RouteState Highway 303
CountyMaricopa County
StateArizona
Coordinates33.74375, -112.29927
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
Deck8 Very GoodNo problems noted.
Superstructure8 Very GoodNo problems noted.
Substructure8 Very GoodNo problems noted.
Last inspectionFebruary 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation8: Equal to present desirable criteria
Deck geometry9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating99 US tons
Inventory rating67 US tons

Structure

Structure typeBox Beam or Girders - Single or Spread
MaterialPrestressed Concrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHL 93
Structure length414 ft (126.2 m)
Longest span185 ft (56.4 m)
Deck width61 ft (18.5 m)
Roadway width58 ft (17.7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic6,900 (2022)
Projected traffic6,910 by 2042
Trucks7%
Lanes on structure2
Traffic directionOne-way traffic
CarriesOverpass structure at an interchange
CrossesHighway
Detour if closed—
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 SR 303L over Lone Mtn Pkwy built?

It was built in 2010, making it 15 years old in 2025.

What condition is SR 303L over Lone Mtn Pkwy 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 February 2023.

How much traffic does SR 303L over Lone Mtn Pkwy carry?

About 6,900 vehicles per day (2022 count), of which roughly 7% are trucks.

How long is SR 303L over Lone Mtn Pkwy?

The structure is 414 ft (126.2 m) long with a longest span of 185 ft (56.4 m) and a deck 61 ft wide.

Who owns SR 303L over Lone Mtn Pkwy?

It is owned by the State Highway Agency.