US Bridges

Entiat River Road over Entiat River

Good

Chelan County, Washington · 03.9W JCT SR 97 · Structure no. 081306000000000

Built
1974
51 years old
Condition
Good
inspected August 2023
Type
Slab
Prestressed Concrete Continuous
Length
281 ft
3 main spans
Daily traffic
1,274
2018 count
Owner
County
County Highway Agency

About this bridge

Entiat River Road over Entiat River is a prestressed concrete continuous slab carrying Entiat River Road over Entiat River in Chelan County, Washington. It was built in 1974, so it is 51 years old, older than the Washington average of 49.8 years.

The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 1,274 vehicles a day, roughly 16% of them trucks, projected to reach 1,593 by 2038. The structure is 281 ft (85.6 m) long and 35 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

CarriesEntiat River Road
CrossesEntiat River
Location03.9W JCT SR 97
RouteCounty Highway 94470
Coordinates47.67125, -120.30294
Functional classRural Major Collector

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection7 GoodSome minor problems.
Last inspectionAugust 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation6: Equal to present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating32.8 US tons
Inventory rating25.4 US tons

Structure

Structure typeSlab
MaterialPrestressed Concrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length281 ft (85.6 m)
Longest span104 ft (31.7 m)
Deck width35 ft (10.6 m)
Roadway width32 ft (9.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,274 (2018)
Projected traffic1,593 by 2038
Trucks16%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.2 mi (2 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 proposedDeck rehabilitation with only incidental widening
Estimated improvement cost$4.3 million (2022 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Entiat River Road over Entiat River built?

It was built in 1974, making it 51 years old in 2025.

What condition is Entiat River Road over Entiat River in?

The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in August 2023.

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

About 1,274 vehicles per day (2018 count), of which roughly 16% are trucks.

How long is Entiat River Road over Entiat River?

The structure is 281 ft (85.6 m) long with a longest span of 104 ft (31.7 m) and a deck 35 ft wide.

Who owns Entiat River Road over Entiat River?

It is owned by the County Highway Agency.