US Bridges

Stone Road over Dry Wash

Good

Yakima County, Washington · 00.18 SW Cook Road · Structure no. 083907000000000

Built
1968
57 years old
Condition
Good
inspected February 2023
Type
Channel Beam
Concrete
Length
22 ft
1 main span
Daily traffic
650
2023 count
Owner
County
County Highway Agency

About this bridge

Stone Road over Dry Wash is a concrete channel beam carrying Stone Road over Dry Wash in Yakima County, Washington. It was built in 1968, so it is 57 years old, older than the Washington average of 49.8 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 650 vehicles a day, roughly 5% of them trucks, projected to reach 1,000 by 2043. The structure is 22 ft (6.7 m) long and 32 ft wide. If it were closed, the detour would be 8.1 mi (13 km).

CarriesStone Road
CrossesDry Wash
Location00.18 SW Cook Road
RouteCounty Highway 30350
Coordinates46.58328, -120.71478
Functional classRural Minor Collector

Condition and inspection

Good

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

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionFebruary 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry6: Equal to present minimum criteria
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating32.2 US tons
Inventory rating24.7 US tons

Structure

Structure typeChannel Beam
MaterialConcrete
DeckOther
Main spans1
Design loadH 20
Structure length22 ft (6.7 m)
Longest span21 ft (6.4 m)
Deck width32 ft (9.8 m)
Roadway width31 ft (9.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic650 (2023)
Projected traffic1,000 by 2043
Trucks5%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed8.1 mi (13 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCounty Highway Agency
Maintained byCounty Highway Agency
Historic statusHistorical significance not determinable at this time
Work proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$1.2 million (2022 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Stone Road over Dry Wash built?

It was built in 1968, making it 57 years old in 2025.

What condition is Stone Road over Dry 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 February 2023.

How much traffic does Stone Road over Dry Wash carry?

About 650 vehicles per day (2023 count), of which roughly 5% are trucks.

How long is Stone Road over Dry Wash?

The structure is 22 ft (6.7 m) long with a longest span of 21 ft (6.4 m) and a deck 32 ft wide.

Who owns Stone Road over Dry Wash?

It is owned by the County Highway Agency.