US Bridges

SR 179 NB over Wash

Fair

Coconino County, Arizona · 9.7 MI N JCT I-17 · Structure no. 05066

Built
1900
125 years old, rebuilt 2008
Condition
Fair
inspected July 2023
Type
Culvert
Concrete Continuous
Length
22 ft
3 main spans
Daily traffic
6,735
2022 count
Owner
State
State Highway Agency

About this bridge

SR 179 NB over Wash is a concrete continuous culvert carrying SR 179 NB over Wash in Coconino County, Arizona. It was built in 1900 and reconstructed in 2008, so it is 125 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 6,735 vehicles a day, roughly 11% of them trucks, projected to reach 6,745 by 2042. The structure is 22 ft (6.7 m) long. If it were closed, the detour would be 1.2 mi (2 km).

Location

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CarriesSR 179 NB
CrossesWash
Location9.7 MI N JCT I-17
RouteState Highway 179
CountyCoconino County
StateArizona
Coordinates34.81169, -111.76483
Functional classRural Principal Arterial - Other

Condition and inspection

Fair

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

ComponentRatingMeaning
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Culvert6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionJuly 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating86 US tons
Inventory rating51 US tons

Structure

Structure typeCulvert
MaterialConcrete Continuous
DeckNot applicable
Main spans3
Design loadH 15
Structure length22 ft (6.7 m)
Longest span6 ft (1.8 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic6,735 (2022)
Projected traffic6,745 by 2042
Trucks11%
Lanes on structure1
Traffic directionOne-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.2 mi (2 km)
TollOn a free road
National Highway SystemYes

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 SR 179 NB over Wash built?

It was built in 1900, making it 125 years old in 2025. It was reconstructed in 2008.

What condition is SR 179 NB over Wash 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 2023.

How much traffic does SR 179 NB over Wash carry?

About 6,735 vehicles per day (2022 count), of which roughly 11% are trucks.

How long is SR 179 NB over Wash?

The structure is 22 ft (6.7 m) long with a longest span of 6 ft (1.8 m).

Who owns SR 179 NB over Wash?

It is owned by the State Highway Agency.