US Bridges

Pinnacle Peak RD over I-17

Good

Maricopa County, Arizona · 6.9 MI S. of JCT SR 74 · Structure no. 20112

Built
2018
7 years old
Condition
Good
inspected October 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
261 ft
2 main spans
Daily traffic
17,037
2023 count
Owner
State
State Highway Agency

About this bridge

Pinnacle Peak RD over I-17 is a prestressed concrete stringer/multi-beam or girder carrying Pinnacle Peak RD over I-17 in Maricopa County, Arizona. It was built in 2018, so it is 7 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 17,037 vehicles a day, roughly 5% of them trucks, projected to reach 17,047 by 2042. The structure is 261 ft (79.6 m) long and 125 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

Location

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CarriesPinnacle Peak RD
CrossesI-17
Location6.9 MI S. of JCT SR 74
RouteCity Street 0
CountyMaricopa County
StateArizona
Coordinates33.6997, -112.1151
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 geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Approach roadway alignment8: Equal to present desirable criteria
Operating rating99 US tons
Inventory rating46 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans2
Design loadHL 93
Structure length261 ft (79.6 m)
Longest span129 ft (39.3 m)
Deck width125 ft (38.1 m)
Roadway width106 ft (32.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic17,037 (2023)
Projected traffic17,047 by 2042
Trucks5%
Lanes on structure8
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesHighway
Detour if closed3.1 mi (5 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 Pinnacle Peak RD over I-17 built?

It was built in 2018, making it 7 years old in 2025.

What condition is Pinnacle Peak 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 October 2023.

How much traffic does Pinnacle Peak RD over I-17 carry?

About 17,037 vehicles per day (2023 count), of which roughly 5% are trucks.

How long is Pinnacle Peak RD over I-17?

The structure is 261 ft (79.6 m) long with a longest span of 129 ft (39.3 m) and a deck 125 ft wide.

Who owns Pinnacle Peak RD over I-17?

It is owned by the State Highway Agency.