US Bridges

303 L over Unnamed Wash

Good

Maricopa County, Arizona · 3.2 MI NE of US 60 · Structure no. 07225

Built
2004
21 years old
Condition
Good
inspected March 2023
Type
Culvert
Concrete Continuous
Length
21 ft
2 main spans
Daily traffic
14,320
2017 count
Owner
State
State Highway Agency

About this bridge

303 L over Unnamed Wash is a concrete continuous culvert carrying 303 L over Unnamed Wash in Maricopa County, Arizona. It was built in 2004, so it is 21 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 14,320 vehicles a day, roughly 7% of them trucks, projected to reach 14,330 by 2037. The structure is 21 ft (6.4 m) long. If it were closed, the detour would be 3.1 mi (5 km).

Carries303 L
CrossesUnnamed Wash
Location3.2 MI NE of US 60
RouteState Highway 303
StateArizona
Coordinates33.69769, -112.3567
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
Channel and channel protection7 GoodSome minor problems.
Culvert7 GoodSome minor problems.
Last inspectionMarch 2023
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating99 US tons
Inventory rating84 US tons

Structure

Structure typeCulvert
MaterialConcrete Continuous
DeckNot applicable
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 traffic14,320 (2017)
Projected traffic14,330 by 2037
Trucks7%
Lanes on structure6
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.1 mi (5 km)
TollOn a free road
National Highway SystemYes
Strategic Highway NetworkInterstate STRAHNET route

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 303 L over Unnamed Wash built?

It was built in 2004, making it 21 years old in 2025.

What condition is 303 L over Unnamed Wash 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 March 2023.

How much traffic does 303 L over Unnamed Wash carry?

About 14,320 vehicles per day (2017 count), of which roughly 7% are trucks.

How long is 303 L over Unnamed Wash?

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

Who owns 303 L over Unnamed Wash?

It is owned by the State Highway Agency.