US Bridges

SR 303L over Channel N1

Fair

Maricopa County, Arizona · 5.0 MI W JCT I-17 · Structure no. 02923

Built
2010
15 years old
Condition
Fair
inspected February 2023
Type
Slab
Concrete Continuous
Length
78 ft
2 main spans
Daily traffic
26,433
2022 count
Owner
State
State Highway Agency

About this bridge

SR 303L over Channel N1 is a concrete continuous slab carrying SR 303L over Channel N1 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 fair condition with a lowest component rating of 6 out of 9. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

It carries about 26,433 vehicles a day, roughly 7% of them trucks, projected to reach 26,443 by 2042. The structure is 78 ft (23.8 m) long and 80 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesSR 303L
CrossesChannel N1
Location5.0 MI W JCT I-17
RouteState Highway 303
CountyMaricopa County
StateArizona
Coordinates33.7796, -112.2133
Functional classUrban Principal Arterial - Other Freeway or Expressway

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure7 GoodSome minor problems.
Channel and channel protection7 GoodSome minor problems.
Last inspectionFebruary 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry9: Superior to present desirable criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating89.9 US tons
Inventory rating54 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans2
Design loadHS 25 or greater
Structure length78 ft (23.8 m)
Longest span38 ft (11.6 m)
Deck width80 ft (24.3 m)
Roadway width77 ft (23.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic26,433 (2022)
Projected traffic26,443 by 2042
Trucks7%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.2 mi (2 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 SR 303L over Channel N1 built?

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

What condition is SR 303L over Channel N1 in?

The National Bridge Inventory rates it in fair condition. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound. The last reported inspection was in February 2023.

How much traffic does SR 303L over Channel N1 carry?

About 26,433 vehicles per day (2022 count), of which roughly 7% are trucks.

How long is SR 303L over Channel N1?

The structure is 78 ft (23.8 m) long with a longest span of 38 ft (11.6 m) and a deck 80 ft wide.

Who owns SR 303L over Channel N1?

It is owned by the State Highway Agency.