US Bridges

Thrall Road over Cherry Creek

Fair

Kittitas County, Washington · 00.05 E No. 6 Road · Structure no. 083883000000000

Built
1969
56 years old
Condition
Fair
inspected September 2024
Type
Slab
Concrete Continuous
Length
189 ft
3 main spans
Daily traffic
2,000
2023 count
Owner
County
County Highway Agency

About this bridge

Thrall Road over Cherry Creek is a concrete continuous slab carrying Thrall Road over Cherry Creek in Kittitas County, Washington. It was built in 1969, so it is 56 years old, older than the Washington average of 49.8 years.

The most recent inspection reported to the Federal Highway Administration rates it in fair condition with a lowest component rating of 6 out of 9. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

It carries about 2,000 vehicles a day, roughly 26% of them trucks, projected to reach 6,052 by 2041. The structure is 189 ft (57.6 m) long and 41 ft wide. If it were closed, the detour would be 6.8 mi (11 km).

CarriesThrall Road
CrossesCherry Creek
Location00.05 E No. 6 Road
RouteCounty Highway 96751
Coordinates46.92623, -120.49553
Functional classRural Major Collector

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection7 GoodSome minor problems.
Last inspectionSeptember 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation6: Equal to 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 rating51.8 US tons
Inventory rating40 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans3 (+2 approach)
Design loadHS 20
Structure length189 ft (57.6 m)
Longest span42 ft (12.8 m)
Deck width41 ft (12.6 m)
Roadway width38 ft (11.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic2,000 (2023)
Projected traffic6,052 by 2041
Trucks26%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed6.8 mi (11 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 proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was Thrall Road over Cherry Creek built?

It was built in 1969, making it 56 years old in 2025.

What condition is Thrall Road over Cherry Creek in?

The National Bridge Inventory rates it in fair condition. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound. The last reported inspection was in September 2024.

How much traffic does Thrall Road over Cherry Creek carry?

About 2,000 vehicles per day (2023 count), of which roughly 26% are trucks.

How long is Thrall Road over Cherry Creek?

The structure is 189 ft (57.6 m) long with a longest span of 42 ft (12.8 m) and a deck 41 ft wide.

Who owns Thrall Road over Cherry Creek?

It is owned by the County Highway Agency.