US Bridges

Williamson Vly RD over Mint Wash

Fair

Yavapai County, Arizona · 17.6 MI N JCT Iron Spr RD · Structure no. 09106

Built
1937
88 years old, rebuilt 1957
Condition
Fair
inspected July 2023
Type
Slab
Concrete Continuous
Length
99 ft
5 main spans
Daily traffic
372
2021 count
Owner
County
County Highway Agency

About this bridge

Williamson Vly RD over Mint Wash is a concrete continuous slab carrying Williamson Vly RD over Mint Wash in Yavapai County, Arizona. It was built in 1937 and reconstructed in 1957, so it is 88 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 372 vehicles a day, roughly 1% of them trucks, projected to reach 382 by 2041. The structure is 99 ft (30.2 m) long and 22 ft wide. If it were closed, the detour would be 98.8 mi (159 km).

Location

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CarriesWilliamson Vly RD
CrossesMint Wash
Location17.6 MI N JCT Iron Spr RD
RouteCounty Highway 0
CountyYavapai County
StateArizona
Coordinates34.7736, -112.6089
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.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
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
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 adequacy5: Somewhat better than minimum adequacy to tolerate being left in place as is
Approach roadway alignment8: Equal to present desirable criteria
Operating rating55 US tons
Inventory rating33 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans5
Design loadHS 20
Structure length99 ft (30.2 m)
Longest span20 ft (6.1 m)
Deck width22 ft (6.8 m)
Roadway width20 ft (6.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic372 (2021)
Projected traffic382 by 2041
Trucks1%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed98.8 mi (159 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 Williamson Vly RD over Mint Wash built?

It was built in 1937, making it 88 years old in 2025. It was reconstructed in 1957.

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

About 372 vehicles per day (2021 count), of which roughly 1% are trucks.

How long is Williamson Vly RD over Mint Wash?

The structure is 99 ft (30.2 m) long with a longest span of 20 ft (6.1 m) and a deck 22 ft wide.

Who owns Williamson Vly RD over Mint Wash?

It is owned by the County Highway Agency.