I-17 NB over SR 179

Fair

Yavapai County, Arizona · JCT SR 179 · Structure no. 00633

Built: 1961; 64 years old
Condition: Fair; inspected September 2024
Type: Slab; Concrete Continuous
Length: 107 ft; 3 main spans
Daily traffic: 11,430; 2022 count
Owner: State; State Highway Agency

About this bridge

I-17 NB over SR 179 is a concrete continuous slab carrying I-17 NB over SR 179 in Yavapai County, Arizona. It was built in 1961, so it is 64 years old, older than the Arizona average of 47.8 years.

The most recent inspection reported to the Federal Highway Administration rates it in fair condition with a lowest component rating of 6 out of 9. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

It carries about 11,430 vehicles a day, roughly 24% of them trucks, projected to reach 11,440 by 2042. The structure is 107 ft (32.6 m) long and 43 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps

CarriesI-17 NB

CrossesSR 179

LocationJCT SR 179

RouteInterstate 17

CountyYavapai County

StateArizona

Coordinates34.69, -111.7433

Functional classRural Principal Arterial - Interstate

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

Component	Rating	Meaning
Deck	6 Satisfactory	Structural elements show some minor deterioration.
Superstructure	6 Satisfactory	Structural elements show some minor deterioration.
Substructure	7 Good	Some minor problems.

Last inspectionSeptember 2024

Inspection intervalevery 24 months

Operating statusOpen, no restriction

ScourBridge not over waterway

Structural evaluation6: Equal to present minimum criteria

Deck geometry6: Equal to present minimum criteria

Approach roadway alignment8: Equal to present desirable criteria

Operating rating54 US tons

Inventory rating32 US tons

Structure

Structure typeSlab

MaterialConcrete Continuous

DeckConcrete, cast-in-place

Main spans3

Design loadHS 20

Structure length107 ft (32.6 m)

Longest span40 ft (12.2 m)

Deck width43 ft (13.1 m)

Roadway width38 ft (11.6 m)

Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic11,430 (2022)

Projected traffic11,440 by 2042

Trucks24%

Lanes on structure2

Traffic directionOne-way traffic

CarriesOverpass structure at an interchange

CrossesHighway

Detour if closed1.2 mi (2 km)

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 SR 179 built?

It was built in 1961, making it 64 years old in 2025.

What condition is I-17 NB over SR 179 in?

The National Bridge Inventory rates it in fair condition. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound. The last reported inspection was in September 2024.

How much traffic does I-17 NB over SR 179 carry?

About 11,430 vehicles per day (2022 count), of which roughly 24% are trucks.

How long is I-17 NB over SR 179?

The structure is 107 ft (32.6 m) long with a longest span of 40 ft (12.2 m) and a deck 43 ft wide.

Who owns I-17 NB over SR 179?

It is owned by the State Highway Agency.