US Bridges

Robinson Can Road over Light Ditch

Fair

Kittitas County, Washington · 00.09 W S Thorp HWY · Structure no. 083882000000000

Built
1957
68 years old
Condition
Fair
inspected November 2023
Type
Stringer/Multi-beam or Girder
Concrete Continuous
Length
59 ft
2 main spans
Daily traffic
885
2022 count
Owner
County
County Highway Agency

About this bridge

Robinson Can Road over Light Ditch is a concrete continuous stringer/multi-beam or girder carrying Robinson Can Road over Light Ditch in Kittitas County, Washington. It was built in 1957, so it is 68 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.

It carries about 885 vehicles a day, roughly 26% of them trucks, projected to reach 1,701 by 2040. The structure is 59 ft (18 m) long and 26 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

Location

Open in Google Maps
CarriesRobinson Can Road
CrossesLight Ditch
Location00.09 W S Thorp HWY
RouteCounty Highway 54510
CountyKittitas County
StateWashington
Coordinates47.01409, -120.62174
Functional classRural Minor 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.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
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 statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation4: Meets minimum tolerable limits to be left in place as is
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating21.1 US tons
Inventory rating16.4 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans2
Design loadHS 15
Structure length59 ft (18 m)
Longest span23 ft (7 m)
Deck width26 ft (7.9 m)
Roadway width24 ft (7.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic885 (2022)
Projected traffic1,701 by 2040
Trucks26%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed3.7 mi (6 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 Robinson Can Road over Light Ditch built?

It was built in 1957, making it 68 years old in 2025.

What condition is Robinson Can Road over Light 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 Robinson Can Road over Light Ditch carry?

About 885 vehicles per day (2022 count), of which roughly 26% are trucks.

How long is Robinson Can Road over Light Ditch?

The structure is 59 ft (18 m) long with a longest span of 23 ft (7 m) and a deck 26 ft wide.

Who owns Robinson Can Road over Light Ditch?

It is owned by the County Highway Agency.