US Bridges

IRR BIA RTE N27 over Cottonwood Wash

Good

Apache County, Arizona · 17.7KM South of Chinle · Structure no. 00000000000N550

Built
2008
17 years old, rebuilt 9999
Condition
Good
inspected April 2023
Type
Culvert
Steel
Length
46 ft
3 main spans
Daily traffic
550
2023 count
Owner
Federal
Bureau of Indian Affairs

About this bridge

IRR BIA RTE N27 over Cottonwood Wash is a steel culvert carrying IRR BIA RTE N27 over Cottonwood Wash in Apache County, Arizona. It was built in 2008 and reconstructed in 9999, so it is 17 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 8 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 550 vehicles a day, roughly 5% of them trucks, projected to reach 683 by 2040. The structure is 46 ft (14 m) long and 118 ft wide. If it were closed, the detour would be 42.9 mi (69 km).

Location

Open in Google Maps
CarriesIRR BIA RTE N27
CrossesCottonwood Wash
Location17.7KM South of Chinle
RouteFederal Lands Road 27
CountyApache County
StateArizona
Coordinates35.99486, -109.53905
Functional classRural Local

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 protection7 GoodSome minor problems.
Culvert8 Very GoodNo problems noted.
Last inspectionApril 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation8: Equal to present desirable criteria
Deck geometry9: Superior to present desirable criteria
Waterway adequacy4: Meets minimum tolerable limits to be left in place as is
Approach roadway alignment8: Equal to present desirable criteria
Operating rating62.2 US tons
Inventory rating55.7 US tons

Structure

Structure typeCulvert
MaterialSteel
DeckNot applicable
Main spans3
Design loadUnknown
Structure length46 ft (14 m)
Longest span12 ft (3.8 m)
Deck width118 ft (36 m)
Roadway width40 ft (12.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic550 (2023)
Projected traffic683 by 2040
Trucks5%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed42.9 mi (69 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 N27 over Cottonwood Wash built?

It was built in 2008, making it 17 years old in 2025. It was reconstructed in 9999.

What condition is IRR BIA RTE N27 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 April 2023.

How much traffic does IRR BIA RTE N27 over Cottonwood Wash carry?

About 550 vehicles per day (2023 count), of which roughly 5% are trucks.

How long is IRR BIA RTE N27 over Cottonwood Wash?

The structure is 46 ft (14 m) long with a longest span of 12 ft (3.8 m) and a deck 118 ft wide.

Who owns IRR BIA RTE N27 over Cottonwood Wash?

It is owned by the Bureau of Indian Affairs.