US Bridges

CO RD 30170 over Peshastin CR

FairPosted for load

Chelan County, Washington · 0.02 W JCT US97 · Structure no. 083178000000000

Built
1923
102 years old, rebuilt 1948
Condition
Fair
inspected September 2024
Type
Tee Beam
Concrete
Length
110 ft
3 main spans
Daily traffic
440
2020 count
Owner
County
County Highway Agency

About this bridge

CO RD 30170 over Peshastin CR is a concrete tee beam carrying CO RD 30170 over Peshastin CR in Chelan County, Washington. It was built in 1923 and reconstructed in 1948, so it is 102 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. Its operating status is: posted for load restriction.

It carries about 440 vehicles a day, roughly 4% of them trucks, projected to reach 550 by 2041. The structure is 110 ft (33.5 m) long and 23 ft wide. If it were closed, the detour would be 98.8 mi (159 km).

Location

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CarriesCO RD 30170
CrossesPeshastin CR
Location0.02 W JCT US97
RouteCounty Highway 30170
CountyChelan County
StateWashington
Coordinates47.475, -120.66667
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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
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 inspectionSeptember 2024
Inspection intervalevery 24 months
Operating statusPosted for load restriction
ScourFoundations stable; scour above top of footing
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry3: Basically intolerable, requiring high priority of corrective action
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating24.7 US tons
Inventory rating19.3 US tons

Structure

Structure typeTee Beam
MaterialConcrete
DeckConcrete, cast-in-place
Main spans3
Design loadH 15
Structure length110 ft (33.5 m)
Longest span40 ft (12.2 m)
Deck width23 ft (7 m)
Roadway width20 ft (6.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic440 (2020)
Projected traffic550 by 2041
Trucks4%
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 statusNot eligible for the National Register of Historic Places
Work proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$4.3 million (2022 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was CO RD 30170 over Peshastin CR built?

It was built in 1923, making it 102 years old in 2025. It was reconstructed in 1948.

What condition is CO RD 30170 over Peshastin CR 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 September 2024.

How much traffic does CO RD 30170 over Peshastin CR carry?

About 440 vehicles per day (2020 count), of which roughly 4% are trucks.

How long is CO RD 30170 over Peshastin CR?

The structure is 110 ft (33.5 m) long with a longest span of 40 ft (12.2 m) and a deck 23 ft wide.

Who owns CO RD 30170 over Peshastin CR?

It is owned by the County Highway Agency.