US Bridges

Downstream Road over North Fork Tieton

Good

Yakima County, Washington · W. of Clear Lake · Structure no. 061708000001511

Built
1971
54 years old
Condition
Good
inspected August 2021
Type
Frame
Concrete Continuous
Length
100 ft
3 main spans
Daily traffic
10
1995 count
Owner
Federal
U.S. Forest Service

About this bridge

Downstream Road over North Fork Tieton is a concrete continuous frame carrying Downstream Road over North Fork Tieton in Yakima County, Washington. It was built in 1971, so it is 54 years old, older 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 vehicles a day, projected to reach 15 by 2045. The structure is 100 ft (30.5 m) long and 16 ft wide. If it were closed, the detour would be 98.2 mi (158 km).

CarriesDownstream Road
CrossesNorth Fork Tieton
LocationW. of Clear Lake
RouteFederal Lands Road 12075
Coordinates46.61389, -121.31889
Functional classRural Local

Condition and inspection

Good

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

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection7 GoodSome minor problems.
Last inspectionAugust 2021
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation7: Better than present minimum criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating65 US tons
Inventory rating45.1 US tons

Structure

Structure typeFrame
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadOther
Structure length100 ft (30.5 m)
Longest span65 ft (19.8 m)
Deck width16 ft (4.9 m)
Roadway width14 ft (4.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic10 (1995)
Projected traffic15 by 2045
Trucks—
Lanes on structure1
Traffic directionOne-lane bridge for two-way traffic
CarriesHighway
CrossesWaterway
Detour if closed98.2 mi (158 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerU.S. Forest Service
Maintained byU.S. Forest Service
Historic statusHistorical significance not determinable at this time
Work proposedOther structural work, including hydraulic replacements
Estimated improvement cost$2,000
NavigationNo navigation control on waterway

Frequently asked questions

When was Downstream Road over North Fork Tieton built?

It was built in 1971, making it 54 years old in 2025.

What condition is Downstream Road over North Fork Tieton 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 August 2021.

How much traffic does Downstream Road over North Fork Tieton carry?

About 10 vehicles per day (1995 count).

How long is Downstream Road over North Fork Tieton?

The structure is 100 ft (30.5 m) long with a longest span of 65 ft (19.8 m) and a deck 16 ft wide.

Who owns Downstream Road over North Fork Tieton?

It is owned by the U.S. Forest Service.