US Bridges

US 97 over Bonaparte CR

Good

Okanogan County, Washington · 22.4 N JCT SR 215 · Structure no. 0005367A0000000

Built
1957
68 years old
Condition
Good
inspected July 2023
Type
Slab
Concrete Continuous
Length
80 ft
3 main spans
Daily traffic
5,771
2023 count
Owner
State
State Highway Agency

About this bridge

US 97 over Bonaparte CR is a concrete continuous slab carrying US 97 over Bonaparte CR in Okanogan County, Washington. It was built in 1957, so it is 68 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 5,771 vehicles a day, roughly 11% of them trucks, projected to reach 7,361 by 2039. The structure is 80 ft (24.4 m) long and 40 ft wide. If it were closed, the detour would be 6.2 mi (10 km).

Location

Open in Google Maps
CarriesUS 97
CrossesBonaparte CR
Location22.4 N JCT SR 215
RouteU.S. Route 97
CountyOkanogan County
StateWashington
Coordinates48.70158, -119.44244
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
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionJuly 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourScour critical; foundations unstable for calculated scour conditions
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 rating45 US tons
Inventory rating27 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 15
Structure length80 ft (24.4 m)
Longest span31 ft (9.4 m)
Deck width40 ft (12.2 m)
Roadway width36 ft (11 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic5,771 (2023)
Projected traffic7,361 by 2039
Trucks11%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed6.2 mi (10 km)
TollOn a free road
National Highway SystemYes

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusHistorical significance not determinable at this time
Work proposedRehabilitation because of general structure deterioration or inadequate strength
Estimated improvement cost$1.4 million (2022 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was US 97 over Bonaparte CR built?

It was built in 1957, making it 68 years old in 2025.

What condition is US 97 over Bonaparte CR 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 July 2023.

How much traffic does US 97 over Bonaparte CR carry?

About 5,771 vehicles per day (2023 count), of which roughly 11% are trucks.

How long is US 97 over Bonaparte CR?

The structure is 80 ft (24.4 m) long with a longest span of 31 ft (9.4 m) and a deck 40 ft wide.

Who owns US 97 over Bonaparte CR?

It is owned by the State Highway Agency.