US Bridges

I 17; NB over Rock Park RD

Good

Coconino County, Arizona · 16.6 MI N JCT SR 179 · Structure no. 00626

Built
1958
67 years old
Condition
Good
inspected August 2024
Type
Frame
Concrete
Length
29 ft
1 main span
Daily traffic
12,105
2021 count
Owner
State
State Highway Agency

About this bridge

I 17; NB over Rock Park RD is a concrete frame carrying I 17; NB over Rock Park RD in Coconino County, Arizona. It was built in 1958, so it is 67 years old, older 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 12,105 vehicles a day, roughly 24% of them trucks, projected to reach 12,115 by 2041. The structure is 29 ft (8.8 m) long and 42 ft wide.

CarriesI 17; NB
CrossesRock Park RD
Location16.6 MI N JCT SR 179
RouteInterstate 17
StateArizona
Coordinates34.8531, -111.607
Functional classRural Principal Arterial - Interstate

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 inspectionAugust 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation7: Better than present minimum criteria
Deck geometry7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating61 US tons
Inventory rating37 US tons

Structure

Structure typeFrame
MaterialConcrete
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20
Structure length29 ft (8.8 m)
Longest span25 ft (7.6 m)
Deck width42 ft (12.8 m)
Roadway width40 ft (12.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic12,105 (2021)
Projected traffic12,115 by 2041
Trucks24%
Lanes on structure2
Traffic directionOne-way traffic
CarriesOverpass structure at an interchange
CrossesHighway
Detour if closed—
TollOn a free road
National Highway SystemYes
Strategic Highway NetworkInterstate STRAHNET route

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 I 17; NB over Rock Park RD built?

It was built in 1958, making it 67 years old in 2025.

What condition is I 17; NB over Rock Park RD 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 August 2024.

How much traffic does I 17; NB over Rock Park RD carry?

About 12,105 vehicles per day (2021 count), of which roughly 24% are trucks.

How long is I 17; NB over Rock Park RD?

The structure is 29 ft (8.8 m) long with a longest span of 25 ft (7.6 m) and a deck 42 ft wide.

Who owns I 17; NB over Rock Park RD?

It is owned by the State Highway Agency.