US Bridges

Powerhouse Road over Low Flow Channel

Good

Yakima County, Washington · 1000 West of S Naches RD · Structure no. 087726000000000

Built
2007
18 years old
Condition
Good
inspected January 2023
Type
Culvert
Steel
Length
23 ft
1 main span
Daily traffic
2,400
2019 count
Owner
County
County Highway Agency

About this bridge

Powerhouse Road over Low Flow Channel is a steel culvert carrying Powerhouse Road over Low Flow Channel in Yakima County, Washington. It was built in 2007, so it is 18 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 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 2,400 vehicles a day, roughly 10% of them trucks, projected to reach 3,900 by 2039. The structure is 23 ft (7 m) long. If it were closed, the detour would be 3.1 mi (5 km).

Location

Open in Google Maps
CarriesPowerhouse Road
CrossesLow Flow Channel
Location1000 West of S Naches RD
RouteCounty Highway 10010
CountyYakima County
StateWashington
Coordinates46.63313, -120.58823
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 protection8 Very GoodNo problems noted.
Culvert7 GoodSome minor problems.
Last inspectionJanuary 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating38.3 US tons
Inventory rating29.3 US tons

Structure

Structure typeCulvert
MaterialSteel
DeckNot applicable
Main spans1
Design loadHL 93
Structure length23 ft (7 m)
Longest span23 ft (7 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic2,400 (2019)
Projected traffic3,900 by 2039
Trucks10%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed3.1 mi (5 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 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 Powerhouse Road over Low Flow Channel built?

It was built in 2007, making it 18 years old in 2025.

What condition is Powerhouse Road over Low Flow Channel 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 January 2023.

How much traffic does Powerhouse Road over Low Flow Channel carry?

About 2,400 vehicles per day (2019 count), of which roughly 10% are trucks.

How long is Powerhouse Road over Low Flow Channel?

The structure is 23 ft (7 m) long with a longest span of 23 ft (7 m).

Who owns Powerhouse Road over Low Flow Channel?

It is owned by the County Highway Agency.