US Bridges

Mcdowell RD over I 17

Good

Maricopa County, Arizona · 6.8 MI N JCT I 10 · Structure no. 01951

Built
1986
39 years old
Condition
Good
inspected July 2024
Type
Stringer/Multi-beam or Girder
Prestressed Concrete Continuous
Length
239 ft
2 main spans
Daily traffic
27,121
2021 count
Owner
State
State Highway Agency

About this bridge

Mcdowell RD over I 17 is a prestressed concrete continuous stringer/multi-beam or girder carrying Mcdowell RD over I 17 in Maricopa County, Arizona. It was built in 1986, so it is 39 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 27,121 vehicles a day, roughly 5% of them trucks, projected to reach 27,131 by 2041. The structure is 239 ft (72.8 m) long and 107 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

CarriesMcdowell RD
CrossesI 17
Location6.8 MI N JCT I 10
RouteCity Street 0
StateArizona
Coordinates33.4659, -112.1103
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
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Last inspectionJuly 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation7: Better than present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Approach roadway alignment6: Equal to present minimum criteria
Operating rating78 US tons
Inventory rating47 US tons

Structure

MaterialPrestressed Concrete Continuous
DeckConcrete, cast-in-place
Main spans2
Design loadHS 20
Structure length239 ft (72.8 m)
Longest span115 ft (35.1 m)
Deck width107 ft (32.6 m)
Roadway width91 ft (27.6 m)
Vertical clearance over deck19 ft (5.9 m)

Traffic and service

Average daily traffic27,121 (2021)
Projected traffic27,131 by 2041
Trucks5%
Lanes on structure7
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesHighway
Detour if closed1.9 mi (3 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 I 17 built?

It was built in 1986, making it 39 years old in 2025.

What condition is Mcdowell RD over I 17 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 July 2024.

How much traffic does Mcdowell RD over I 17 carry?

About 27,121 vehicles per day (2021 count), of which roughly 5% are trucks.

How long is Mcdowell RD over I 17?

The structure is 239 ft (72.8 m) long with a longest span of 115 ft (35.1 m) and a deck 107 ft wide.

Who owns Mcdowell RD over I 17?

It is owned by the State Highway Agency.