US Bridges

L Green Canyon RD over Hiline Canal

Fair

Kittitas County, Washington · 00.12 N Smithson RD · Structure no. 083823000000000

Built
1931
94 years old, rebuilt 1970
Condition
Fair
inspected October 2024
Type
Channel Beam
Concrete
Length
53 ft
3 main spans
Daily traffic
138
2022 count
Owner
County
County Highway Agency

About this bridge

L Green Canyon RD over Hiline Canal is a concrete channel beam carrying L Green Canyon RD over Hiline Canal in Kittitas County, Washington. It was built in 1931 and reconstructed in 1970, so it is 94 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 138 vehicles a day, roughly 24% of them trucks, projected to reach 365 by 2042. The structure is 53 ft (16.2 m) long and 26 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

Location

Open in Google Maps
CarriesL Green Canyon RD
CrossesHiline Canal
Location00.12 N Smithson RD
RouteCounty Highway 34383
CountyKittitas County
StateWashington
Coordinates47.10447, -120.60332
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
Deck7 GoodSome minor problems.
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 inspectionOctober 2024
Inspection intervalevery 12 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating46 US tons
Inventory rating36 US tons

Structure

Structure typeChannel Beam
MaterialConcrete
DeckConcrete, precast panels
Main spans3
Design loadH 15
Structure length53 ft (16.2 m)
Longest span19 ft (5.8 m)
Deck width26 ft (7.9 m)
Roadway width24 ft (7.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic138 (2022)
Projected traffic365 by 2042
Trucks24%
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 L Green Canyon RD over Hiline Canal built?

It was built in 1931, making it 94 years old in 2025. It was reconstructed in 1970.

What condition is L Green Canyon RD over Hiline Canal 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 October 2024.

How much traffic does L Green Canyon RD over Hiline Canal carry?

About 138 vehicles per day (2022 count), of which roughly 24% are trucks.

How long is L Green Canyon RD over Hiline Canal?

The structure is 53 ft (16.2 m) long with a longest span of 19 ft (5.8 m) and a deck 26 ft wide.

Who owns L Green Canyon RD over Hiline Canal?

It is owned by the County Highway Agency.