US Bridges

Nile Road over Naches River

Fair

Yakima County, Washington · 00.19 W of SR 410 · Structure no. 082884000000000

Built
1965
60 years old
Condition
Fair
inspected March 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete Continuous
Length
215 ft
3 main spans
Daily traffic
600
2023 count
Owner
County
County Highway Agency

About this bridge

Nile Road over Naches River is a prestressed concrete continuous stringer/multi-beam or girder carrying Nile Road over Naches River in Yakima County, Washington. It was built in 1965, so it is 60 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 600 vehicles a day, roughly 5% of them trucks, projected to reach 1,100 by 2043. The structure is 215 ft (65.5 m) long and 30 ft wide. If it were closed, the detour would be 9.9 mi (16 km).

Location

Open in Google Maps
CarriesNile Road
CrossesNaches River
Location00.19 W of SR 410
RouteCounty Highway 15500
CountyYakima County
StateWashington
Coordinates46.85617, -120.95725
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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionMarch 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation4: Meets minimum tolerable limits to be left in place as is
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating19.6 US tons
Inventory rating15.8 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length215 ft (65.5 m)
Longest span155 ft (47.2 m)
Deck width30 ft (9.1 m)
Roadway width26 ft (7.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic600 (2023)
Projected traffic1,100 by 2043
Trucks5%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed9.9 mi (16 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$8.1 million (2022 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Nile Road over Naches River built?

It was built in 1965, making it 60 years old in 2025.

What condition is Nile Road over Naches River 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 March 2023.

How much traffic does Nile Road over Naches River carry?

About 600 vehicles per day (2023 count), of which roughly 5% are trucks.

How long is Nile Road over Naches River?

The structure is 215 ft (65.5 m) long with a longest span of 155 ft (47.2 m) and a deck 30 ft wide.

Who owns Nile Road over Naches River?

It is owned by the County Highway Agency.