US Bridges

SR 260 over Cottonwood Wash

Fair

Navajo County, Arizona · 18.8 MI W JCT US 60 · Structure no. 01643

Built
1974
51 years old, rebuilt 2005
Condition
Fair
inspected October 2024
Type
Stringer/Multi-beam or Girder
Prestressed Concrete Continuous
Length
174 ft
3 main spans
Daily traffic
4,639
2022 count
Owner
State
State Highway Agency

About this bridge

SR 260 over Cottonwood Wash is a prestressed concrete continuous stringer/multi-beam or girder carrying SR 260 over Cottonwood Wash in Navajo County, Arizona. It was built in 1974 and reconstructed in 2005, so it is 51 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 4,639 vehicles a day, roughly 15% of them trucks, projected to reach 4,649 by 2042. The structure is 174 ft (53 m) long and 41 ft wide. If it were closed, the detour would be 16.2 mi (26 km).

Location

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CarriesSR 260
CrossesCottonwood Wash
Location18.8 MI W JCT US 60
RouteState Highway 260
CountyNavajo County
StateArizona
Coordinates34.3642, -110.3326
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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection7 GoodSome minor problems.
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 geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating89.9 US tons
Inventory rating46 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length174 ft (53 m)
Longest span58 ft (17.7 m)
Deck width41 ft (12.4 m)
Roadway width38 ft (11.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic4,639 (2022)
Projected traffic4,649 by 2042
Trucks15%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed16.2 mi (26 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 260 over Cottonwood Wash built?

It was built in 1974, making it 51 years old in 2025. It was reconstructed in 2005.

What condition is SR 260 over Cottonwood 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 October 2024.

How much traffic does SR 260 over Cottonwood Wash carry?

About 4,639 vehicles per day (2022 count), of which roughly 15% are trucks.

How long is SR 260 over Cottonwood Wash?

The structure is 174 ft (53 m) long with a longest span of 58 ft (17.7 m) and a deck 41 ft wide.

Who owns SR 260 over Cottonwood Wash?

It is owned by the State Highway Agency.