US Bridges

Naneum Road over Hiline Canal

Fair

Kittitas County, Washington · 00.14 S Bar 14 Road · Structure no. 080995000000000

Built
1931
94 years old, rebuilt 1972
Condition
Fair
inspected November 2024
Type
Channel Beam
Concrete
Length
45 ft
2 main spans
Daily traffic
201
2019 count
Owner
County
County Highway Agency

About this bridge

Naneum Road over Hiline Canal is a concrete channel beam carrying Naneum Road over Hiline Canal in Kittitas County, Washington. It was built in 1931 and reconstructed in 1972, 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 201 vehicles a day, roughly 20% of them trucks, projected to reach 532 by 2039. The structure is 45 ft (13.7 m) long and 26 ft wide. If it were closed, the detour would be 5 mi (8 km).

Location

Open in Google Maps
CarriesNaneum Road
CrossesHiline Canal
Location00.14 S Bar 14 Road
RouteCounty Highway 42000
CountyKittitas County
StateWashington
Coordinates47.07185, -120.46771
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 protection7 GoodSome minor problems.
Last inspectionNovember 2024
Inspection intervalevery 24 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 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 rating46 US tons
Inventory rating36 US tons

Structure

Structure typeChannel Beam
MaterialConcrete
DeckOther
Main spans2
Design loadHS 20
Structure length45 ft (13.7 m)
Longest span23 ft (7 m)
Deck width26 ft (7.9 m)
Roadway width24 ft (7.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic201 (2019)
Projected traffic532 by 2039
Trucks20%
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 proposedRehabilitation because of general structure deterioration or inadequate strength
Estimated improvement cost$598,000 (2022 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Naneum Road over Hiline Canal built?

It was built in 1931, making it 94 years old in 2025. It was reconstructed in 1972.

What condition is Naneum Road 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 November 2024.

How much traffic does Naneum Road over Hiline Canal carry?

About 201 vehicles per day (2019 count), of which roughly 20% are trucks.

How long is Naneum Road over Hiline Canal?

The structure is 45 ft (13.7 m) long with a longest span of 23 ft (7 m) and a deck 26 ft wide.

Who owns Naneum Road over Hiline Canal?

It is owned by the County Highway Agency.