US Bridges

IRR BIA RTE N59 over T-Amp-Let Wash

Good

Apache County, Arizona · 6MI N 2MI W of Rough Rock · Structure no. 00000000000N530

Built
1980
45 years old
Condition
Good
inspected April 2023
Type
Culvert
Steel
Length
36 ft
1 main span
Daily traffic
1,650
2023 count
Owner
Federal
Bureau of Indian Affairs

About this bridge

IRR BIA RTE N59 over T-Amp-Let Wash is a steel culvert carrying IRR BIA RTE N59 over T-Amp-Let Wash in Apache County, Arizona. It was built in 1980, so it is 45 years old, younger 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 1,650 vehicles a day, roughly 10% of them trucks, projected to reach 1,887 by 2040. The structure is 36 ft (11 m) long and 138 ft wide. If it were closed, the detour would be 6.8 mi (11 km).

Location

Open in Google Maps
CarriesIRR BIA RTE N59
CrossesT-Amp-Let Wash
Location6MI N 2MI W of Rough Rock
RouteFederal Lands Road 0N59
CountyApache County
StateArizona
Coordinates36.48308, -109.88056
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
Channel and channel protection4 PoorAdvanced section loss, deterioration, spalling or scour.
Culvert7 GoodSome minor problems.
Last inspectionApril 2023
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 alignment8: Equal to present desirable criteria
Operating rating49.1 US tons
Inventory rating35.9 US tons

Structure

Structure typeCulvert
MaterialSteel
DeckNot applicable
Main spans1
Design loadHS 20
Structure length36 ft (11 m)
Longest span36 ft (11 m)
Deck width138 ft (42.2 m)
Roadway width37 ft (11.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,650 (2023)
Projected traffic1,887 by 2040
Trucks10%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed6.8 mi (11 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 T-Amp-Let Wash built?

It was built in 1980, making it 45 years old in 2025.

What condition is IRR BIA RTE N59 over T-Amp-Let 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 April 2023.

How much traffic does IRR BIA RTE N59 over T-Amp-Let Wash carry?

About 1,650 vehicles per day (2023 count), of which roughly 10% are trucks.

How long is IRR BIA RTE N59 over T-Amp-Let Wash?

The structure is 36 ft (11 m) long with a longest span of 36 ft (11 m) and a deck 138 ft wide.

Who owns IRR BIA RTE N59 over T-Amp-Let Wash?

It is owned by the Bureau of Indian Affairs.