US Bridges

Old Naches RD over Naches-Selah Canal

Fair

Yakima County, Washington · 00.13 NE of SR 410 · Structure no. 084704000000000

Built
1957
68 years old
Condition
Fair
inspected December 2022
Type
Channel Beam
Concrete
Length
30 ft
1 main span
Daily traffic
170
2020 count
Owner
County
County Highway Agency

About this bridge

Old Naches RD over Naches-Selah Canal is a concrete channel beam carrying Old Naches RD over Naches-Selah Canal in Yakima County, Washington. It was built in 1957, so it is 68 years old, older than the Washington average of 49.8 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 170 vehicles a day, roughly 5% of them trucks, projected to reach 180 by 2040. The structure is 30 ft (9.1 m) long and 24 ft wide. If it were closed, the detour would be 6.8 mi (11 km).

Location

Open in Google Maps
CarriesOld Naches RD
CrossesNaches-Selah Canal
Location00.13 NE of SR 410
RouteCounty Highway 15650
CountyYakima County
StateWashington
Coordinates46.7496, -120.78675
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
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionDecember 2022
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating30.3 US tons
Inventory rating23.3 US tons

Structure

Structure typeChannel Beam
MaterialConcrete
DeckOther
Main spans1
Design loadH 20
Structure length30 ft (9.1 m)
Longest span29 ft (8.8 m)
Deck width24 ft (7.4 m)
Roadway width24 ft (7.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic170 (2020)
Projected traffic180 by 2040
Trucks5%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed6.8 mi (11 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$1.4 million (2022 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Old Naches RD over Naches-Selah Canal built?

It was built in 1957, making it 68 years old in 2025.

What condition is Old Naches RD over Naches-Selah Canal 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 December 2022.

How much traffic does Old Naches RD over Naches-Selah Canal carry?

About 170 vehicles per day (2020 count), of which roughly 5% are trucks.

How long is Old Naches RD over Naches-Selah Canal?

The structure is 30 ft (9.1 m) long with a longest span of 29 ft (8.8 m) and a deck 24 ft wide.

Who owns Old Naches RD over Naches-Selah Canal?

It is owned by the County Highway Agency.