US Bridges

North Fork Rd. over Ahtanum Creek N. Fork

Good

Yakima County, Washington · 7.4 Mile W of S Fork RD · Structure no. 088995000000000

Built
2018
7 years old
Condition
Good
inspected May 2024
Type
Slab
Concrete
Length
70 ft
1 main span
Daily traffic
225
2022 count
Owner
County
County Highway Agency

About this bridge

North Fork Rd. over Ahtanum Creek N. Fork is a concrete slab carrying North Fork Rd. over Ahtanum Creek N. Fork in Yakima County, Washington. It was built in 2018, so it is 7 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 225 vehicles a day, roughly 10% of them trucks, projected to reach 255 by 2042. The structure is 70 ft (21.3 m) long and 32 ft wide. If it were closed, the detour would be 98.8 mi (159 km).

Location

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CarriesNorth Fork Rd.
CrossesAhtanum Creek N. Fork
Location7.4 Mile W of S Fork RD
RouteCounty Highway 30000
CountyYakima County
StateWashington
Coordinates46.53279, -120.99617
Functional classRural Minor Collector

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Deck8 Very GoodNo problems noted.
Superstructure8 Very GoodNo problems noted.
Substructure8 Very GoodNo problems noted.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionMay 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation8: Equal to present desirable criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating74.3 US tons
Inventory rating56.1 US tons

Structure

Structure typeSlab
MaterialConcrete
DeckConcrete, precast panels
Main spans1
Design loadHL 93
Structure length70 ft (21.3 m)
Longest span67 ft (20.4 m)
Deck width32 ft (9.8 m)
Roadway width31 ft (9.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic225 (2022)
Projected traffic255 by 2042
Trucks10%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed98.8 mi (159 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$2.9 million (2022 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was North Fork Rd. over Ahtanum Creek N. Fork built?

It was built in 2018, making it 7 years old in 2025.

What condition is North Fork Rd. over Ahtanum Creek N. Fork 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 May 2024.

How much traffic does North Fork Rd. over Ahtanum Creek N. Fork carry?

About 225 vehicles per day (2022 count), of which roughly 10% are trucks.

How long is North Fork Rd. over Ahtanum Creek N. Fork?

The structure is 70 ft (21.3 m) long with a longest span of 67 ft (20.4 m) and a deck 32 ft wide.

Who owns North Fork Rd. over Ahtanum Creek N. Fork?

It is owned by the County Highway Agency.