US Bridges

Chiwawa River Road over Chikamin Creek

Good

Chelan County, Washington · 9.2 W JCT Chiwawa Loop RD · Structure no. 088693000000000

Built
2014
11 years old
Condition
Good
inspected September 2024
Type
Slab
Prestressed Concrete
Length
67 ft
1 main span
Daily traffic
76
2021 count
Owner
County
County Highway Agency

About this bridge

Chiwawa River Road over Chikamin Creek is a prestressed concrete slab carrying Chiwawa River Road over Chikamin Creek in Chelan County, Washington. It was built in 2014, so it is 11 years old, younger 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 8 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 76 vehicles a day, projected to reach 115 by 2041. The structure is 67 ft (20.4 m) long and 29 ft wide. If it were closed, the detour would be 98.8 mi (159 km).

CarriesChiwawa River Road
CrossesChikamin Creek
Location9.2 W JCT Chiwawa Loop RD
RouteCounty Highway 37790
Coordinates47.90845, -120.72217
Functional classRural Local

Condition and inspection

Good

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

ComponentRatingMeaning
Deck8 Very GoodNo problems noted.
Superstructure8 Very GoodNo problems noted.
Substructure8 Very GoodNo problems noted.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionSeptember 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation8: Equal to present desirable criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating87.2 US tons
Inventory rating65.4 US tons

Structure

Structure typeSlab
MaterialPrestressed Concrete
DeckOther
Main spans1
Design loadHL 93
Structure length67 ft (20.4 m)
Longest span66 ft (20 m)
Deck width29 ft (8.7 m)
Roadway width26 ft (7.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic76 (2021)
Projected traffic115 by 2041
Trucks0%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
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 statusListed on the National Register of Historic Places
Work proposedOther structural work, including hydraulic replacements
Estimated improvement cost$827,000 (2022 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Chiwawa River Road over Chikamin Creek built?

It was built in 2014, making it 11 years old in 2025.

What condition is Chiwawa River Road over Chikamin Creek 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 September 2024.

How much traffic does Chiwawa River Road over Chikamin Creek carry?

About 76 vehicles per day (2021 count).

How long is Chiwawa River Road over Chikamin Creek?

The structure is 67 ft (20.4 m) long with a longest span of 66 ft (20 m) and a deck 29 ft wide.

Who owns Chiwawa River Road over Chikamin Creek?

It is owned by the County Highway Agency.