US Bridges

BIA 507 over Keams Canyon Wash

Good

Navajo County, Arizona · 7 KM West of First Mesa · Structure no. 0000H65608B0222

Built
1984
41 years old
Condition
Good
inspected December 2024
Type
Culvert
Steel
Length
60 ft
2 main spans
Daily traffic
445
2024 count
Owner
Federal
Bureau of Indian Affairs

About this bridge

BIA 507 over Keams Canyon Wash is a steel culvert carrying BIA 507 over Keams Canyon Wash in Navajo County, Arizona. It was built in 1984, so it is 41 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 445 vehicles a day, roughly 15% of them trucks, projected to reach 661 by 2044. The structure is 60 ft (18.2 m) long and 90 ft wide. If it were closed, the detour would be 8.7 mi (14 km).

CarriesBIA 507
CrossesKeams Canyon Wash
Location7 KM West of First Mesa
RouteFederal Lands Road 27
StateArizona
Coordinates35.82931, -110.30294
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.
Culvert7 GoodSome minor problems.
Last inspectionDecember 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating48.7 US tons
Inventory rating35.7 US tons

Structure

Structure typeCulvert
MaterialSteel
DeckNot applicable
Main spans2
Design loadHS 20
Structure length60 ft (18.2 m)
Longest span24 ft (7.3 m)
Deck width90 ft (27.5 m)
Roadway width24 ft (7.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic445 (2024)
Projected traffic661 by 2044
Trucks15%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed8.7 mi (14 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 BIA 507 over Keams Canyon Wash built?

It was built in 1984, making it 41 years old in 2025.

What condition is BIA 507 over Keams Canyon 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 December 2024.

How much traffic does BIA 507 over Keams Canyon Wash carry?

About 445 vehicles per day (2024 count), of which roughly 15% are trucks.

How long is BIA 507 over Keams Canyon Wash?

The structure is 60 ft (18.2 m) long with a longest span of 24 ft (7.3 m) and a deck 90 ft wide.

Who owns BIA 507 over Keams Canyon Wash?

It is owned by the Bureau of Indian Affairs.