US Bridges

I 17; NB over Munds Canyon

Fair

Coconino County, Arizona · 23.1 MI N JCT SR 179 · Structure no. 01657

Built
1976
49 years old
Condition
Fair
inspected July 2024
Type
Box Beam or Girders - Single or Spread
Concrete Continuous
Length
383 ft
3 main spans
Daily traffic
9,809
2022 count
Owner
State
State Highway Agency

About this bridge

I 17; NB over Munds Canyon is a concrete continuous box beam or girders - single or spread carrying I 17; NB over Munds Canyon in Coconino County, Arizona. It was built in 1976, so it is 49 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 5 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 9,809 vehicles a day, roughly 24% of them trucks, projected to reach 9,819 by 2042. The structure is 383 ft (116.7 m) long and 45 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesI 17; NB
CrossesMunds Canyon
Location23.1 MI N JCT SR 179
RouteInterstate 17
CountyCoconino County
StateArizona
Coordinates34.9325, -111.6493
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.

ComponentRatingMeaning
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure7 GoodSome minor problems.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection7 GoodSome minor problems.
Last inspectionJuly 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry8: Equal to present desirable criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating96 US tons
Inventory rating55 US tons

Structure

Structure typeBox Beam or Girders - Single or Spread
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length383 ft (116.7 m)
Longest span145 ft (44.2 m)
Deck width45 ft (13.6 m)
Roadway width42 ft (12.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic9,809 (2022)
Projected traffic9,819 by 2042
Trucks24%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway
CrossesWaterway
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—
NavigationNo navigation control on waterway

Frequently asked questions

When was I 17; NB over Munds Canyon built?

It was built in 1976, making it 49 years old in 2025.

What condition is I 17; NB over Munds Canyon 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 July 2024.

How much traffic does I 17; NB over Munds Canyon carry?

About 9,809 vehicles per day (2022 count), of which roughly 24% are trucks.

How long is I 17; NB over Munds Canyon?

The structure is 383 ft (116.7 m) long with a longest span of 145 ft (44.2 m) and a deck 45 ft wide.

Who owns I 17; NB over Munds Canyon?

It is owned by the State Highway Agency.