US Bridges

SR303L over Northern Parkway

Good

Maricopa County, Arizona · 6.5 Miles N of I-10 · Structure no. 20009

Built
2013
12 years old
Condition
Good
inspected June 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete Continuous
Length
185 ft
2 main spans
Daily traffic
27,365
2021 count
Owner
State
State Highway Agency

About this bridge

SR303L over Northern Parkway is a prestressed concrete continuous stringer/multi-beam or girder carrying SR303L over Northern Parkway in Maricopa County, Arizona. It was built in 2013, so it is 12 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 27,365 vehicles a day, roughly 10% of them trucks, projected to reach 27,375 by 2041. The structure is 185 ft (56.4 m) long and 99 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

CarriesSR303L
CrossesNorthern Parkway
Location6.5 Miles N of I-10
RouteState Highway 303
StateArizona
Coordinates33.5587, -112.4184
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.
Superstructure8 Very GoodNo problems noted.
Substructure7 GoodSome minor problems.
Last inspectionJune 2023
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 rating88 US tons
Inventory rating38 US tons

Structure

MaterialPrestressed Concrete Continuous
DeckConcrete, cast-in-place
Main spans2
Design loadHL 93
Structure length185 ft (56.4 m)
Longest span90 ft (27.4 m)
Deck width99 ft (30.1 m)
Roadway width95 ft (29.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic27,365 (2021)
Projected traffic27,375 by 2041
Trucks10%
Lanes on structure4
Traffic directionOne-way traffic
CarriesHighway
CrossesHighway
Detour if closed1.2 mi (2 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 SR303L over Northern Parkway built?

It was built in 2013, making it 12 years old in 2025.

What condition is SR303L over Northern Parkway 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 June 2023.

How much traffic does SR303L over Northern Parkway carry?

About 27,365 vehicles per day (2021 count), of which roughly 10% are trucks.

How long is SR303L over Northern Parkway?

The structure is 185 ft (56.4 m) long with a longest span of 90 ft (27.4 m) and a deck 99 ft wide.

Who owns SR303L over Northern Parkway?

It is owned by the State Highway Agency.