US Bridges

US 180 over Cottonwood Wash

Good

Navajo County, Arizona · 18.3 MI E JCT SR 77 · Structure no. 01603

Built
1971
54 years old, rebuilt 2020
Condition
Good
inspected October 2024
Type
Slab
Concrete Continuous
Length
111 ft
4 main spans
Daily traffic
418
2022 count
Owner
State
State Highway Agency

About this bridge

US 180 over Cottonwood Wash is a concrete continuous slab carrying US 180 over Cottonwood Wash in Navajo County, Arizona. It was built in 1971 and reconstructed in 2020, so it is 54 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 418 vehicles a day, roughly 18% of them trucks, projected to reach 428 by 2042. The structure is 111 ft (33.8 m) long and 43 ft wide. If it were closed, the detour would be 51 mi (82 km).

Location

Open in Google Maps
CarriesUS 180
CrossesCottonwood Wash
Location18.3 MI E JCT SR 77
RouteU.S. Route 180
CountyNavajo County
StateArizona
Coordinates34.78866, -109.88215
Functional classRural 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.
Substructure7 GoodSome minor problems.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionOctober 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourCountermeasures installed to correct a previously existing problem
Structural evaluation7: Better than present minimum criteria
Deck geometry8: Equal to present desirable criteria
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating59 US tons
Inventory rating36 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans4
Design loadHS 20
Structure length111 ft (33.8 m)
Longest span30 ft (9.1 m)
Deck width43 ft (13 m)
Roadway width40 ft (12.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic418 (2022)
Projected traffic428 by 2042
Trucks18%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed51 mi (82 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—
NavigationNo navigation control on waterway

Frequently asked questions

When was US 180 over Cottonwood Wash built?

It was built in 1971, making it 54 years old in 2025. It was reconstructed in 2020.

What condition is US 180 over Cottonwood Wash 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 2024.

How much traffic does US 180 over Cottonwood Wash carry?

About 418 vehicles per day (2022 count), of which roughly 18% are trucks.

How long is US 180 over Cottonwood Wash?

The structure is 111 ft (33.8 m) long with a longest span of 30 ft (9.1 m) and a deck 43 ft wide.

Who owns US 180 over Cottonwood Wash?

It is owned by the State Highway Agency.