US Bridges

Park Road over Cottonwood Wash

Fair

Navajo County, Arizona · 1.65 Miles North of U.S. · Structure no. 8430001P0000000

Built
1971
54 years old
Condition
Fair
inspected April 2024
Type
Slab
Concrete Continuous
Length
90 ft
3 main spans
Daily traffic
2,200
2019 count
Owner
Federal
National Park Service

About this bridge

Park Road over Cottonwood Wash is a concrete continuous slab carrying Park Road over Cottonwood Wash in Navajo County, Arizona. It was built in 1971, so it is 54 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 2,200 vehicles a day, roughly 1% of them trucks, projected to reach 3,000 by 2039. The structure is 90 ft (27.5 m) long and 35 ft wide. If it were closed, the detour would be 80.2 mi (129 km).

Location

Open in Google Maps
CarriesPark Road
CrossesCottonwood Wash
Location1.65 Miles North of U.S.
RouteFederal Lands Road 10
CountyNavajo County
StateArizona
Coordinates34.809, -109.87522
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.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure7 GoodSome minor problems.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionApril 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation6: Equal to present minimum criteria
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy4: Meets minimum tolerable limits to be left in place as is
Approach roadway alignment8: Equal to present desirable criteria
Operating rating63.9 US tons
Inventory rating38 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length90 ft (27.5 m)
Longest span34 ft (10.3 m)
Deck width35 ft (10.7 m)
Roadway width33 ft (10.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic2,200 (2019)
Projected traffic3,000 by 2039
Trucks1%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed80.2 mi (129 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerNational Park Service
Maintained byNational Park Service
Historic statusNot eligible for the National Register of Historic Places
Work proposedNone recorded
Estimated improvement cost$173,000 (2022 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Park Road over Cottonwood Wash built?

It was built in 1971, making it 54 years old in 2025.

What condition is Park Road over Cottonwood Wash 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 April 2024.

How much traffic does Park Road over Cottonwood Wash carry?

About 2,200 vehicles per day (2019 count), of which roughly 1% are trucks.

How long is Park Road over Cottonwood Wash?

The structure is 90 ft (27.5 m) long with a longest span of 34 ft (10.3 m) and a deck 35 ft wide.

Who owns Park Road over Cottonwood Wash?

It is owned by the National Park Service.