US Bridges

IRR SR 264 over Dinnebito Wash

Good

Navajo County, Arizona · 21.5 MI W JCT SR 87 · Structure no. 01013

Built
1955
70 years old, rebuilt 2022
Condition
Good
inspected October 2024
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
212 ft
3 main spans
Daily traffic
716
2022 count
Owner
State
State Highway Agency

About this bridge

IRR SR 264 over Dinnebito Wash is a steel continuous stringer/multi-beam or girder carrying IRR SR 264 over Dinnebito Wash in Navajo County, Arizona. It was built in 1955 and reconstructed in 2022, so it is 70 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 716 vehicles a day, roughly 6% of them trucks, projected to reach 726 by 2042. The structure is 212 ft (64.6 m) long and 34 ft wide. If it were closed, the detour would be 98.8 mi (159 km).

Location

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CarriesIRR SR 264
CrossesDinnebito Wash
Location21.5 MI W JCT SR 87
RouteState Highway 264
CountyNavajo County
StateArizona
Coordinates35.9833, -110.70754
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.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionOctober 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation7: Better than present minimum criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating60 US tons
Inventory rating36 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length212 ft (64.6 m)
Longest span82 ft (25 m)
Deck width34 ft (10.4 m)
Roadway width31 ft (9.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic716 (2022)
Projected traffic726 by 2042
Trucks6%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed98.8 mi (159 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 proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$1,000 (2022 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was IRR SR 264 over Dinnebito Wash built?

It was built in 1955, making it 70 years old in 2025. It was reconstructed in 2022.

What condition is IRR SR 264 over Dinnebito 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 IRR SR 264 over Dinnebito Wash carry?

About 716 vehicles per day (2022 count), of which roughly 6% are trucks.

How long is IRR SR 264 over Dinnebito Wash?

The structure is 212 ft (64.6 m) long with a longest span of 82 ft (25 m) and a deck 34 ft wide.

Who owns IRR SR 264 over Dinnebito Wash?

It is owned by the State Highway Agency.