US Bridges

Chiwawa Road over Rock Creek

Fair

Chelan County, Washington · No Data Entered · Structure no. 061706000001448

Built
1961
64 years old
Condition
Fair
inspected June 2023
Type
Stringer/Multi-beam or Girder
Wood or Timber
Length
72 ft
3 main spans
Daily traffic
100
1995 count
Owner
Federal
U.S. Forest Service

About this bridge

Chiwawa Road over Rock Creek is a wood or timber stringer/multi-beam or girder carrying Chiwawa Road over Rock Creek in Chelan County, Washington. It was built in 1961, so it is 64 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 6 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 100 vehicles a day, roughly 10% of them trucks, projected to reach 150 by 2045. The structure is 72 ft (22 m) long and 16 ft wide. If it were closed, the detour would be 98.2 mi (158 km).

CarriesChiwawa Road
CrossesRock Creek
LocationNo Data Entered
RouteFederal Lands Road 62000
Coordinates47.97046, -120.78938
Functional classRural Local

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.
Substructure7 GoodSome minor problems.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionJune 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 geometry6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating39 US tons
Inventory rating27 US tons

Structure

MaterialWood or Timber
DeckWood or timber
Main spans3
Design loadOther
Structure length72 ft (22 m)
Longest span51 ft (15.4 m)
Deck width16 ft (4.9 m)
Roadway width14 ft (4.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic100 (1995)
Projected traffic150 by 2045
Trucks10%
Lanes on structure1
Traffic directionOne-lane bridge for two-way traffic
CarriesHighway
CrossesWaterway
Detour if closed98.2 mi (158 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerU.S. Forest Service
Maintained byU.S. Forest Service
Historic statusHistorical significance not determinable at this time
Work proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was Chiwawa Road over Rock Creek built?

It was built in 1961, making it 64 years old in 2025.

What condition is Chiwawa Road over Rock Creek 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 June 2023.

How much traffic does Chiwawa Road over Rock Creek carry?

About 100 vehicles per day (1995 count), of which roughly 10% are trucks.

How long is Chiwawa Road over Rock Creek?

The structure is 72 ft (22 m) long with a longest span of 51 ft (15.4 m) and a deck 16 ft wide.

Who owns Chiwawa Road over Rock Creek?

It is owned by the U.S. Forest Service.