US Bridges

Fdr 504 over Chevelon Canyon

Fair

Coconino County, Arizona · 0.2 MI N/O Chevelon X Cg · Structure no. 030102000003293

Built
1960
65 years old
Condition
Fair
inspected October 2024
Type
Tee Beam
Concrete Continuous
Length
139 ft
3 main spans
Daily traffic
70
2022 count
Owner
Federal
U.S. Forest Service

About this bridge

Fdr 504 over Chevelon Canyon is a concrete continuous tee beam carrying Fdr 504 over Chevelon Canyon in Coconino County, Arizona. It was built in 1960, so it is 65 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 70 vehicles a day, projected to reach 75 by 2040. The structure is 139 ft (42.4 m) long and 16 ft wide. If it were closed, the detour would be 98.2 mi (158 km).

Location

Open in Google Maps
CarriesFdr 504
CrossesChevelon Canyon
Location0.2 MI N/O Chevelon X Cg
RouteFederal Lands Road 504
CountyCoconino County
StateArizona
Coordinates34.5934, -110.78779
Functional classRural Local

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure7 GoodSome minor problems.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionOctober 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry6: Equal to present minimum criteria
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment3: Basically intolerable, requiring high priority of corrective action
Operating rating26.8 US tons
Inventory rating18.2 US tons

Structure

Structure typeTee Beam
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadH 20
Structure length139 ft (42.4 m)
Longest span52 ft (15.8 m)
Deck width16 ft (4.9 m)
Roadway width14 ft (4.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic70 (2022)
Projected traffic75 by 2040
Trucks—
Lanes on structure1
Traffic directionOne-lane bridge for two-way traffic
CarriesHighway
CrossesWaterway
Detour if closed98.2 mi (158 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerU.S. Forest Service
Maintained byU.S. Forest Service
Historic statusHistorical significance not determinable at this time
Work proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$910,000
NavigationNo navigation control on waterway

Frequently asked questions

When was Fdr 504 over Chevelon Canyon built?

It was built in 1960, making it 65 years old in 2025.

What condition is Fdr 504 over Chevelon Canyon 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 October 2024.

How much traffic does Fdr 504 over Chevelon Canyon carry?

About 70 vehicles per day (2022 count).

How long is Fdr 504 over Chevelon Canyon?

The structure is 139 ft (42.4 m) long with a longest span of 52 ft (15.8 m) and a deck 16 ft wide.

Who owns Fdr 504 over Chevelon Canyon?

It is owned by the U.S. Forest Service.