US Bridges

Williamson Vly RD over Wash

Good

Yavapai County, Arizona · At Merril DR Crossing · Structure no. 10757

Built
1973
52 years old
Condition
Good
inspected July 2023
Type
Culvert
Concrete Continuous
Length
32 ft
3 main spans
Daily traffic
11,515
2021 count
Owner
County
County Highway Agency

About this bridge

Williamson Vly RD over Wash is a concrete continuous culvert carrying Williamson Vly RD over Wash in Yavapai County, Arizona. It was built in 1973, so it is 52 years old, older than the Arizona average of 47.8 years.

The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 11,515 vehicles a day, roughly 1% of them trucks, projected to reach 11,525 by 2041. The structure is 32 ft (9.8 m) long. If it were closed, the detour would be 21.7 mi (35 km).

Location

No coordinates are recorded for this structure.

CarriesWilliamson Vly RD
CrossesWash
LocationAt Merril DR Crossing
RouteCounty Highway 0
StateArizona
Functional classUrban Collector

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Channel and channel protection7 GoodSome minor problems.
Culvert7 GoodSome minor problems.
Last inspectionJuly 2023
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating99 US tons
Inventory rating84 US tons

Structure

Structure typeCulvert
MaterialConcrete Continuous
DeckNot applicable
Main spans3
Design loadHS 20
Structure length32 ft (9.8 m)
Longest span10 ft (3 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic11,515 (2021)
Projected traffic11,525 by 2041
Trucks1%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed21.7 mi (35 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 Wash built?

It was built in 1973, making it 52 years old in 2025.

What condition is Williamson Vly RD over Wash in?

The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in July 2023.

How much traffic does Williamson Vly RD over Wash carry?

About 11,515 vehicles per day (2021 count), of which roughly 1% are trucks.

How long is Williamson Vly RD over Wash?

The structure is 32 ft (9.8 m) long with a longest span of 10 ft (3 m).

Who owns Williamson Vly RD over Wash?

It is owned by the County Highway Agency.