US Bridges

Northern Avenue over SR 303L

Good

Maricopa County, Arizona · 250FT West of 303L · Structure no. 07261

Built
2013
12 years old
Condition
Good
inspected August 2022
Type
Culvert
Concrete Continuous
Length
21 ft
2 main spans
Daily traffic
2,694
2021 count
Owner
State
State Highway Agency

About this bridge

Northern Avenue over SR 303L is a concrete continuous culvert carrying Northern Avenue over SR 303L 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 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 2,694 vehicles a day, roughly 5% of them trucks, projected to reach 2,704 by 2041. The structure is 21 ft (6.4 m) long. If it were closed, the detour would be 1.9 mi (3 km).

Location

Open in Google Maps
CarriesNorthern Avenue
CrossesSR 303L
Location250FT West of 303L
RouteCity Street 0
CountyMaricopa County
StateArizona
Coordinates33.5517, -112.4194
Functional classUrban Collector

Condition and inspection

Good

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

ComponentRatingMeaning
Channel and channel protection8 Very GoodNo problems noted.
Culvert8 Very GoodNo problems noted.
Last inspectionAugust 2022
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation8: Equal to present desirable criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating99 US tons
Inventory rating99 US tons

Structure

Structure typeCulvert
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans2
Design loadHS 20
Structure length21 ft (6.4 m)
Longest span10 ft (3 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic2,694 (2021)
Projected traffic2,704 by 2041
Trucks5%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed1.9 mi (3 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—
NavigationNo navigation control on waterway

Frequently asked questions

When was Northern Avenue over SR 303L built?

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

What condition is Northern Avenue over SR 303L 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 August 2022.

How much traffic does Northern Avenue over SR 303L carry?

About 2,694 vehicles per day (2021 count), of which roughly 5% are trucks.

How long is Northern Avenue over SR 303L?

The structure is 21 ft (6.4 m) long with a longest span of 10 ft (3 m).

Who owns Northern Avenue over SR 303L?

It is owned by the State Highway Agency.