US Bridges

Williamson Vly RD over Williamson Valley Wash

Fair

Yavapai County, Arizona · 21.9 MI N JCT Iron Spr RD · Structure no. 09107

Built
1939
86 years old
Condition
Fair
inspected July 2023
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
170 ft
4 main spans
Daily traffic
160
2023 count
Owner
County
County Highway Agency

About this bridge

Williamson Vly RD over Williamson Valley Wash is a steel continuous stringer/multi-beam or girder carrying Williamson Vly RD over Williamson Valley 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 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 160 vehicles a day, roughly 1% of them trucks, projected to reach 170 by 2042. The structure is 170 ft (51.8 m) long and 25 ft wide. If it were closed, the detour would be 11.8 mi (19 km).

Location

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CarriesWilliamson Vly RD
CrossesWilliamson Valley Wash
Location21.9 MI N JCT Iron Spr RD
RouteCounty Highway 0
CountyYavapai County
StateArizona
Coordinates34.81798, -112.63218
Functional classRural Major Collector

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 protection7 GoodSome minor problems.
Last inspectionJuly 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourCountermeasures installed to correct a previously existing problem
Structural evaluation6: Equal to present minimum criteria
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating53 US tons
Inventory rating31 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans4
Design loadH 15
Structure length170 ft (51.8 m)
Longest span45 ft (13.7 m)
Deck width25 ft (7.6 m)
Roadway width22 ft (6.7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic160 (2023)
Projected traffic170 by 2042
Trucks1%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed11.8 mi (19 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 proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was Williamson Vly RD over Williamson Valley Wash built?

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

What condition is Williamson Vly RD over Williamson Valley 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 Williamson Vly RD over Williamson Valley Wash carry?

About 160 vehicles per day (2023 count), of which roughly 1% are trucks.

How long is Williamson Vly RD over Williamson Valley Wash?

The structure is 170 ft (51.8 m) long with a longest span of 45 ft (13.7 m) and a deck 25 ft wide.

Who owns Williamson Vly RD over Williamson Valley Wash?

It is owned by the County Highway Agency.