US Bridges

Fort Road over Wanity Slough

Good

Yakima County, Washington · Intersection With Elmwood · Structure no. 088689000000000

Built
2014
11 years old
Condition
Good
inspected November 2022
Type
Culvert
Concrete
Length
26 ft
1 main span
Daily traffic
10,500
2020 count
Owner
County
County Highway Agency

About this bridge

Fort Road over Wanity Slough is a concrete culvert carrying Fort Road over Wanity Slough in Yakima County, Washington. It was built in 2014, so it is 11 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 10,500 vehicles a day, roughly 5% of them trucks, projected to reach 11,000 by 2040. The structure is 26 ft (7.9 m) long and 88 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

Location

Open in Google Maps
CarriesFort Road
CrossesWanity Slough
LocationIntersection With Elmwood
RouteCounty Highway 50000
CountyYakima County
StateWashington
Coordinates46.37529, -120.33316
Functional classRural Minor Arterial

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 inspectionNovember 2022
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation7: Better than present minimum criteria
Deck geometry9: Superior to present desirable criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating47.5 US tons
Inventory rating36.4 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckNot applicable
Main spans1
Design loadHL 93
Structure length26 ft (7.9 m)
Longest span26 ft (7.9 m)
Deck width88 ft (26.8 m)
Roadway width86 ft (26.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic10,500 (2020)
Projected traffic11,000 by 2040
Trucks5%
Lanes on structure5
Traffic directionTwo-way traffic
CarriesHighway
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 statusHistorical significance not determinable at this time
Work proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$2.5 million (2022 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Fort Road over Wanity Slough built?

It was built in 2014, making it 11 years old in 2025.

What condition is Fort Road over Wanity Slough 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 November 2022.

How much traffic does Fort Road over Wanity Slough carry?

About 10,500 vehicles per day (2020 count), of which roughly 5% are trucks.

How long is Fort Road over Wanity Slough?

The structure is 26 ft (7.9 m) long with a longest span of 26 ft (7.9 m) and a deck 88 ft wide.

Who owns Fort Road over Wanity Slough?

It is owned by the County Highway Agency.