US Bridges

Naches Rd. South over Naches River South Chan

Good

Yakima County, Washington · .04 North of Klockhamer · Structure no. 088528000000000

Built
2012
13 years old
Condition
Good
inspected February 2023
Type
Culvert
Concrete
Length
38 ft
1 main span
Daily traffic
3,800
2019 count
Owner
County
County Highway Agency

About this bridge

Naches Rd. South over Naches River South Chan is a concrete culvert carrying Naches Rd. South over Naches River South Chan in Yakima County, Washington. It was built in 2012, so it is 13 years old, younger 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 8 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 3,800 vehicles a day, roughly 10% of them trucks, projected to reach 4,000 by 2043. The structure is 38 ft (11.6 m) long and 48 ft wide. If it were closed, the detour would be 9.9 mi (16 km).

CarriesNaches Rd. South
CrossesNaches River South Chan
Location.04 North of Klockhamer
RouteCounty Highway 20150
Coordinates46.72067, -120.70103
Functional classRural Major 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 protection8 Very GoodNo problems noted.
Culvert8 Very GoodNo problems noted.
Last inspectionFebruary 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation8: Equal to present desirable criteria
Deck geometry9: Superior to present desirable criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating51.8 US tons
Inventory rating40 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckNot applicable
Main spans1
Design loadHL 93
Structure length38 ft (11.6 m)
Longest span36 ft (11 m)
Deck width48 ft (14.5 m)
Roadway width45 ft (13.7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic3,800 (2019)
Projected traffic4,000 by 2043
Trucks10%
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$1.7 million (2022 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Naches Rd. South over Naches River South Chan built?

It was built in 2012, making it 13 years old in 2025.

What condition is Naches Rd. South over Naches River South Chan 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 Naches Rd. South over Naches River South Chan carry?

About 3,800 vehicles per day (2019 count), of which roughly 10% are trucks.

How long is Naches Rd. South over Naches River South Chan?

The structure is 38 ft (11.6 m) long with a longest span of 36 ft (11 m) and a deck 48 ft wide.

Who owns Naches Rd. South over Naches River South Chan?

It is owned by the County Highway Agency.