US Bridges

Fdr 504 over Wildcat Canyon

FairPosted for load

Navajo County, Arizona · 1.4 MI Nw/O FSR 153 Int · Structure no. 030102000003202

Built
1953
72 years old
Condition
Fair
inspected October 2024
Type
Slab
Concrete Continuous
Length
56 ft
2 main spans
Daily traffic
70
2021 count
Owner
Federal
U.S. Forest Service

About this bridge

Fdr 504 over Wildcat Canyon is a concrete continuous slab carrying Fdr 504 over Wildcat Canyon in Navajo County, Arizona. It was built in 1953, so it is 72 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 5 out of 9. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound. Its operating status is: posted for load restriction.

It carries about 70 vehicles a day, projected to reach 99 by 2042. The structure is 56 ft (17.2 m) long and 16 ft wide. If it were closed, the detour would be 20.5 mi (33 km).

Location

Open in Google Maps
CarriesFdr 504
CrossesWildcat Canyon
Location1.4 MI Nw/O FSR 153 Int
RouteFederal Lands Road 504
CountyNavajo County
StateArizona
Coordinates34.54004, -110.72855
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
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure7 GoodSome minor problems.
Channel and channel protection7 GoodSome minor problems.
Last inspectionOctober 2024
Inspection intervalevery 24 months
Operating statusPosted for load restriction
ScourFoundations stable; action required to protect exposed foundations
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry6: Equal to present minimum criteria
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment3: Basically intolerable, requiring high priority of corrective action
Operating rating51.8 US tons
Inventory rating40 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans2
Design loadH 15
Structure length56 ft (17.2 m)
Longest span28 ft (8.6 m)
Deck width16 ft (4.9 m)
Roadway width14 ft (4.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic70 (2021)
Projected traffic99 by 2042
Trucks—
Lanes on structure1
Traffic directionOne-lane bridge for two-way traffic
CarriesHighway
CrossesWaterway
Detour if closed20.5 mi (33 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$72,000
NavigationNo navigation control on waterway

Frequently asked questions

When was Fdr 504 over Wildcat Canyon built?

It was built in 1953, making it 72 years old in 2025.

What condition is Fdr 504 over Wildcat 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 Wildcat Canyon carry?

About 70 vehicles per day (2021 count).

How long is Fdr 504 over Wildcat Canyon?

The structure is 56 ft (17.2 m) long with a longest span of 28 ft (8.6 m) and a deck 16 ft wide.

Who owns Fdr 504 over Wildcat Canyon?

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