US Bridges

US 97 over Cascade Canal

Good

Kittitas County, Washington · 1.8 N JCT SR 10 · Structure no. 086143000000000

Built
1900
125 years old
Condition
Good
inspected February 2023
Type
Culvert
Steel
Length
22 ft
1 main span
Daily traffic
2,702
2023 count
Owner
State
State Highway Agency

About this bridge

US 97 over Cascade Canal is a steel culvert carrying US 97 over Cascade Canal in Kittitas County, Washington. It was built in 1900, so it is 125 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 2,702 vehicles a day, roughly 19% of them trucks, projected to reach 3,316 by 2039. The structure is 22 ft (6.7 m) long. If it were closed, the detour would be 6.8 mi (11 km).

Location

Open in Google Maps
CarriesUS 97
CrossesCascade Canal
Location1.8 N JCT SR 10
RouteU.S. Route 97
CountyKittitas County
StateWashington
Coordinates47.05803, -120.61861
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
Channel and channel protection8 Very GoodNo problems noted.
Culvert7 GoodSome minor problems.
Last inspectionFebruary 2023
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation7: Better than present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating106.8 US tons
Inventory rating106.8 US tons

Structure

Structure typeCulvert
MaterialSteel
DeckNot applicable
Main spans1
Design loadUnknown
Structure length22 ft (6.7 m)
Longest span22 ft (6.7 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic2,702 (2023)
Projected traffic3,316 by 2039
Trucks19%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed6.8 mi (11 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$387,000 (2022 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was US 97 over Cascade Canal built?

It was built in 1900, making it 125 years old in 2025.

What condition is US 97 over Cascade Canal 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 February 2023.

How much traffic does US 97 over Cascade Canal carry?

About 2,702 vehicles per day (2023 count), of which roughly 19% are trucks.

How long is US 97 over Cascade Canal?

The structure is 22 ft (6.7 m) long with a longest span of 22 ft (6.7 m).

Who owns US 97 over Cascade Canal?

It is owned by the State Highway Agency.