US Bridges

Entiat River Road over Entiat River

Fair

Chelan County, Washington · 02.76W JCT SR 97 · Structure no. 081596000000000

Built
1941
84 years old
Condition
Fair
inspected August 2023
Type
Tee Beam
Concrete Continuous
Length
170 ft
5 main spans
Daily traffic
1,583
2022 count
Owner
County
County Highway Agency

About this bridge

Entiat River Road over Entiat River is a concrete continuous tee beam carrying Entiat River Road over Entiat River in Chelan County, Washington. It was built in 1941, so it is 84 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 1,583 vehicles a day, roughly 10% of them trucks, projected to reach 1,771 by 2042. The structure is 170 ft (51.8 m) long and 29 ft wide. If it were closed, the detour would be 98.8 mi (159 km).

Location

Open in Google Maps
CarriesEntiat River Road
CrossesEntiat River
Location02.76W JCT SR 97
RouteCounty Highway 94470
CountyChelan County
StateWashington
Coordinates47.66747, -120.28175
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
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure7 GoodSome minor problems.
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 inspectionAugust 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourScour critical; foundations unstable for calculated scour conditions
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 adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating27.9 US tons
Inventory rating21.4 US tons

Structure

Structure typeTee Beam
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans5
Design loadH 15
Structure length170 ft (51.8 m)
Longest span60 ft (18.3 m)
Deck width29 ft (8.7 m)
Roadway width24 ft (7.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,583 (2022)
Projected traffic1,771 by 2042
Trucks10%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed98.8 mi (159 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCounty Highway Agency
Maintained byCounty Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$6.5 million (2022 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Entiat River Road over Entiat River built?

It was built in 1941, making it 84 years old in 2025.

What condition is Entiat River Road over Entiat River 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 August 2023.

How much traffic does Entiat River Road over Entiat River carry?

About 1,583 vehicles per day (2022 count), of which roughly 10% are trucks.

How long is Entiat River Road over Entiat River?

The structure is 170 ft (51.8 m) long with a longest span of 60 ft (18.3 m) and a deck 29 ft wide.

Who owns Entiat River Road over Entiat River?

It is owned by the County Highway Agency.