US Bridges

Ramp NW over I-10

Good

Maricopa County, Arizona · At Junct of I-10/303L · Structure no. 20069

Built
2017
8 years old
Condition
Good
inspected October 2023
Type
Box Beam or Girders - Multiple
Prestressed Concrete Continuous
Length
1,498 ft
8 main spans
Daily traffic
6,527
2023 count
Owner
State
State Highway Agency

About this bridge

Ramp NW over I-10 is a prestressed concrete continuous box beam or girders - multiple carrying Ramp NW over I-10 in Maricopa County, Arizona. It was built in 2017, so it is 8 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 6,527 vehicles a day, roughly 4% of them trucks, projected to reach 6,537 by 2042. The structure is 1,498 ft (456.6 m) long and 43 ft wide. If it were closed, the detour would be 5 mi (8 km).

Location

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CarriesRamp NW
CrossesI-10
LocationAt Junct of I-10/303L
RouteState Highway 303
CountyMaricopa County
StateArizona
Coordinates33.4593, -112.4273
Functional classUrban Local

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 inspectionOctober 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 alignment6: Equal to present minimum criteria
Operating rating59 US tons
Inventory rating36 US tons

Structure

Structure typeBox Beam or Girders - Multiple
MaterialPrestressed Concrete Continuous
DeckConcrete, cast-in-place
Main spans8
Design loadHL 93
Structure length1,498 ft (456.6 m)
Longest span235 ft (71.6 m)
Deck width43 ft (13.2 m)
Roadway width40 ft (12.2 m)
Vertical clearance over deck17 ft (5.2 m)

Traffic and service

Average daily traffic6,527 (2023)
Projected traffic6,537 by 2042
Trucks4%
Lanes on structure2
Traffic directionOne-way traffic
CarriesThird level (interchange)
CrossesHighway
Detour if closed5 mi (8 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—
NavigationNot applicable (no waterway)

Frequently asked questions

When was Ramp NW over I-10 built?

It was built in 2017, making it 8 years old in 2025.

What condition is Ramp NW over I-10 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 October 2023.

How much traffic does Ramp NW over I-10 carry?

About 6,527 vehicles per day (2023 count), of which roughly 4% are trucks.

How long is Ramp NW over I-10?

The structure is 1,498 ft (456.6 m) long with a longest span of 235 ft (71.6 m) and a deck 43 ft wide.

Who owns Ramp NW over I-10?

It is owned by the State Highway Agency.