US Bridges

Mcdowell RD over Ramp Wn

Good

Maricopa County, Arizona · NE of Junct I10 & 303L · Structure no. 02978

Built
2014
11 years old
Condition
Good
inspected October 2023
Type
Box Beam or Girders - Multiple
Prestressed Concrete
Length
106 ft
1 main span
Daily traffic
6,594
2023 count
Owner
State
State Highway Agency

About this bridge

Mcdowell RD over Ramp Wn is a prestressed concrete box beam or girders - multiple carrying Mcdowell RD over Ramp Wn in Maricopa County, Arizona. It was built in 2014, so it is 11 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 6,594 vehicles a day, roughly 2% of them trucks, projected to reach 65,104 by 2042. The structure is 106 ft (32.3 m) long and 115 ft wide. If it were closed, the detour would be 5 mi (8 km).

Location

Open in Google Maps
CarriesMcdowell RD
CrossesRamp Wn
LocationNE of Junct I10 & 303L
RouteCity Street 0
CountyMaricopa County
StateArizona
Coordinates33.4647, -112.4256
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 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 rating99 US tons
Inventory rating61.9 US tons

Structure

Structure typeBox Beam or Girders - Multiple
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans1
Design loadHL 93
Structure length106 ft (32.3 m)
Longest span100 ft (30.5 m)
Deck width115 ft (34.9 m)
Roadway width100 ft (30.5 m)
Vertical clearance over deck39 ft (11.9 m)

Traffic and service

Average daily traffic6,594 (2023)
Projected traffic65,104 by 2042
Trucks2%
Lanes on structure5
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
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 Mcdowell RD over Ramp Wn built?

It was built in 2014, making it 11 years old in 2025.

What condition is Mcdowell RD over Ramp Wn 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 Mcdowell RD over Ramp Wn carry?

About 6,594 vehicles per day (2023 count), of which roughly 2% are trucks.

How long is Mcdowell RD over Ramp Wn?

The structure is 106 ft (32.3 m) long with a longest span of 100 ft (30.5 m) and a deck 115 ft wide.

Who owns Mcdowell RD over Ramp Wn?

It is owned by the State Highway Agency.