US Bridges

US 97 over Peshastin Creek

Good

Chelan County, Washington · 17.0 N Kittitas CO · Structure no. 0005205A0000000

Built
1956
69 years old
Condition
Good
inspected August 2023
Type
Slab
Concrete
Length
58 ft
1 main span
Daily traffic
7,014
2023 count
Owner
State
State Highway Agency

About this bridge

US 97 over Peshastin Creek is a concrete slab carrying US 97 over Peshastin Creek in Chelan County, Washington. It was built in 1956, so it is 69 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 7,014 vehicles a day, roughly 12% of them trucks, projected to reach 8,597 by 2039. The structure is 58 ft (17.8 m) long and 40 ft wide. If it were closed, the detour would be 8.1 mi (13 km).

CarriesUS 97
CrossesPeshastin Creek
Location17.0 N Kittitas CO
RouteU.S. Route 97
Coordinates47.51053, -120.63149
Functional classRural Principal Arterial - Other

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.
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
ScourCountermeasures installed to correct a previously existing problem
Structural evaluation6: Equal to present minimum criteria
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating36.8 US tons
Inventory rating28.2 US tons

Structure

Structure typeSlab
MaterialConcrete
DeckConcrete, cast-in-place
Main spans1
Design loadHS 15
Structure length58 ft (17.8 m)
Longest span52 ft (16 m)
Deck width40 ft (12.3 m)
Roadway width37 ft (11.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic7,014 (2023)
Projected traffic8,597 by 2039
Trucks12%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed8.1 mi (13 km)
TollOn a free road
National Highway SystemYes

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedRehabilitation because of general structure deterioration or inadequate strength
Estimated improvement cost$1.1 million (2022 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was US 97 over Peshastin Creek built?

It was built in 1956, making it 69 years old in 2025.

What condition is US 97 over Peshastin 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 August 2023.

How much traffic does US 97 over Peshastin Creek carry?

About 7,014 vehicles per day (2023 count), of which roughly 12% are trucks.

How long is US 97 over Peshastin Creek?

The structure is 58 ft (17.8 m) long with a longest span of 52 ft (16 m) and a deck 40 ft wide.

Who owns US 97 over Peshastin Creek?

It is owned by the State Highway Agency.