US Bridges

Tjossem Road over Town Ditch

FairPosted for load

Kittitas County, Washington · 00.35 W Cleman Road · Structure no. 081788000000000

Built
1944
81 years old, rebuilt 1974
Condition
Fair
inspected November 2023
Type
Slab
Concrete
Length
25 ft
1 main span
Daily traffic
336
2023 count
Owner
County
County Highway Agency

About this bridge

Tjossem Road over Town Ditch is a concrete slab carrying Tjossem Road over Town Ditch in Kittitas County, Washington. It was built in 1944 and reconstructed in 1974, so it is 81 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 5 out of 9. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound. Its operating status is: posted for other load-capacity restriction.

It carries about 336 vehicles a day, roughly 31% of them trucks, projected to reach 1,939 by 2039. The structure is 25 ft (7.6 m) long and 31 ft wide. If it were closed, the detour would be 5 mi (8 km).

Location

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CarriesTjossem Road
CrossesTown Ditch
Location00.35 W Cleman Road
RouteCounty Highway 96865
CountyKittitas County
StateWashington
Coordinates46.96359, -120.42074
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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionNovember 2023
Inspection intervalevery 24 months
Operating statusPosted for other load-capacity restriction
ScourFoundations stable; scour above top of footing
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating34.9 US tons
Inventory rating27 US tons

Structure

Structure typeSlab
MaterialConcrete
DeckConcrete, cast-in-place
Main spans1
Design loadH 20
Structure length25 ft (7.6 m)
Longest span23 ft (7 m)
Deck width31 ft (9.3 m)
Roadway width29 ft (8.7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic336 (2023)
Projected traffic1,939 by 2039
Trucks31%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed5 mi (8 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$1.3 million (2022 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Tjossem Road over Town Ditch built?

It was built in 1944, making it 81 years old in 2025. It was reconstructed in 1974.

What condition is Tjossem Road over Town Ditch 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 November 2023.

How much traffic does Tjossem Road over Town Ditch carry?

About 336 vehicles per day (2023 count), of which roughly 31% are trucks.

How long is Tjossem Road over Town Ditch?

The structure is 25 ft (7.6 m) long with a longest span of 23 ft (7 m) and a deck 31 ft wide.

Who owns Tjossem Road over Town Ditch?

It is owned by the County Highway Agency.