US Bridges

Old Skull Vly Road over Dead Mule Wash

Fair

Yavapai County, Arizona · 0.1 MI S Iron Springs RD · Structure no. 08255

Built
1939
86 years old
Condition
Fair
inspected July 2023
Type
Stringer/Multi-beam or Girder
Steel
Length
33 ft
1 main span
Daily traffic
120
2023 count
Owner
County
County Highway Agency

About this bridge

Old Skull Vly Road over Dead Mule Wash is a steel stringer/multi-beam or girder carrying Old Skull Vly Road over Dead Mule Wash in Yavapai County, Arizona. It was built in 1939, so it is 86 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.

It carries about 120 vehicles a day, roughly 1% of them trucks, projected to reach 130 by 2042. The structure is 33 ft (10.1 m) long and 21 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

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CarriesOld Skull Vly Road
CrossesDead Mule Wash
Location0.1 MI S Iron Springs RD
RouteCounty Highway 0
CountyYavapai County
StateArizona
Coordinates34.5029, -112.6859
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.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure7 GoodSome minor problems.
Channel and channel protection7 GoodSome minor problems.
Last inspectionJuly 2023
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 geometry3: Basically intolerable, requiring high priority of corrective action
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating47 US tons
Inventory rating28 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans1
Design loadUnknown
Structure length33 ft (10.1 m)
Longest span30 ft (9.1 m)
Deck width21 ft (6.5 m)
Roadway width19 ft (5.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic120 (2023)
Projected traffic130 by 2042
Trucks1%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.2 mi (2 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCounty Highway Agency
Maintained byCounty Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$1,000 (2023 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Old Skull Vly Road over Dead Mule Wash built?

It was built in 1939, making it 86 years old in 2025.

What condition is Old Skull Vly Road over Dead Mule 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 July 2023.

How much traffic does Old Skull Vly Road over Dead Mule Wash carry?

About 120 vehicles per day (2023 count), of which roughly 1% are trucks.

How long is Old Skull Vly Road over Dead Mule Wash?

The structure is 33 ft (10.1 m) long with a longest span of 30 ft (9.1 m) and a deck 21 ft wide.

Who owns Old Skull Vly Road over Dead Mule Wash?

It is owned by the County Highway Agency.