US Bridges

IRR BIA RTE N59 over Wash

Fair

Navajo County, Arizona · 7 MI NW of Agency Line · Structure no. 00000000000N328

Built
1976
49 years old
Condition
Fair
inspected March 2023
Type
Culvert
Steel
Length
21 ft
2 main spans
Daily traffic
1,254
2023 count
Owner
Federal
Bureau of Indian Affairs

About this bridge

IRR BIA RTE N59 over Wash is a steel culvert carrying IRR BIA RTE N59 over Wash in Navajo 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 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 1,254 vehicles a day, roughly 10% of them trucks, projected to reach 1,895 by 2043. The structure is 21 ft (6.4 m) long and 62 ft wide. If it were closed, the detour would be 19.9 mi (32 km).

Location

Open in Google Maps
CarriesIRR BIA RTE N59
CrossesWash
Location7 MI NW of Agency Line
RouteFederal Lands Road 0N59
CountyNavajo County
StateArizona
Coordinates36.52806, -110.02861
Functional classRural Minor Arterial

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 protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Culvert6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionMarch 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating49.1 US tons
Inventory rating36 US tons

Structure

Structure typeCulvert
MaterialSteel
DeckNot applicable
Main spans2
Design loadHS 20
Structure length21 ft (6.4 m)
Longest span9 ft (2.7 m)
Deck width62 ft (18.8 m)
Roadway width35 ft (10.7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,254 (2023)
Projected traffic1,895 by 2043
Trucks10%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed19.9 mi (32 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerBureau of Indian Affairs
Maintained byBureau of Indian Affairs
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 IRR BIA RTE N59 over Wash built?

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

What condition is IRR BIA RTE N59 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 March 2023.

How much traffic does IRR BIA RTE N59 over Wash carry?

About 1,254 vehicles per day (2023 count), of which roughly 10% are trucks.

How long is IRR BIA RTE N59 over Wash?

The structure is 21 ft (6.4 m) long with a longest span of 9 ft (2.7 m) and a deck 62 ft wide.

Who owns IRR BIA RTE N59 over Wash?

It is owned by the Bureau of Indian Affairs.