US Bridges

Mcdowell Road over Loop 303

Good

Mohave County, Arizona · 0.13 MI N of I-10 · Structure no. 02985

Built
2013
12 years old
Condition
Good
inspected October 2024
Type
Box Beam or Girders - Single or Spread
Prestressed Concrete Continuous
Length
357 ft
3 main spans
Daily traffic
6,591
2021 count
Owner
State
State Highway Agency

About this bridge

Mcdowell Road over Loop 303 is a prestressed concrete continuous box beam or girders - single or spread carrying Mcdowell Road over Loop 303 in Mohave 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 6,591 vehicles a day, roughly 5% of them trucks, projected to reach 6,601 by 2041. The structure is 357 ft (108.8 m) long and 126 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

Location

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CarriesMcdowell Road
CrossesLoop 303
Location0.13 MI N of I-10
RouteCity Street 0
CountyMohave County
StateArizona
Coordinates33.4647, -112.4281
Functional classUrban Minor Arterial

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 2024
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 alignment8: Equal to present desirable criteria
Operating rating99 US tons
Inventory rating61.9 US tons

Structure

Structure typeBox Beam or Girders - Single or Spread
MaterialPrestressed Concrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHL 93
Structure length357 ft (108.8 m)
Longest span132 ft (40.2 m)
Deck width126 ft (38.5 m)
Roadway width112 ft (34.1 m)
Vertical clearance over deck18 ft (5.4 m)

Traffic and service

Average daily traffic6,591 (2021)
Projected traffic6,601 by 2041
Trucks5%
Lanes on structure7
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesHighway
Detour if closed3.7 mi (6 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 Mcdowell Road over Loop 303 built?

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

What condition is Mcdowell Road over Loop 303 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 2024.

How much traffic does Mcdowell Road over Loop 303 carry?

About 6,591 vehicles per day (2021 count), of which roughly 5% are trucks.

How long is Mcdowell Road over Loop 303?

The structure is 357 ft (108.8 m) long with a longest span of 132 ft (40.2 m) and a deck 126 ft wide.

Who owns Mcdowell Road over Loop 303?

It is owned by the State Highway Agency.