US Bridges

US 97 over Swauk Creek

Good

Kittitas County, Washington · 3.1 N JCT SR 970 · Structure no. 0014218A0000000

Built
1993
32 years old
Condition
Good
inspected July 2024
Type
Tee Beam
Prestressed Concrete
Length
85 ft
1 main span
Daily traffic
6,080
2023 count
Owner
State
State Highway Agency

About this bridge

US 97 over Swauk Creek is a prestressed concrete tee beam carrying US 97 over Swauk Creek in Kittitas County, Washington. It was built in 1993, so it is 32 years old, younger 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 6,080 vehicles a day, roughly 21% of them trucks, projected to reach 7,689 by 2039. The structure is 85 ft (25.8 m) long and 44 ft wide. If it were closed, the detour would be 6.8 mi (11 km).

Location

Open in Google Maps
CarriesUS 97
CrossesSwauk Creek
Location3.1 N JCT SR 970
RouteU.S. Route 97
CountyKittitas County
StateWashington
Coordinates47.24214, -120.69742
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 2024
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation7: Better than present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating75.9 US tons
Inventory rating45 US tons

Structure

Structure typeTee Beam
MaterialPrestressed Concrete
DeckOther
Main spans1
Design loadHS 25 or greater
Structure length85 ft (25.8 m)
Longest span80 ft (24.3 m)
Deck width44 ft (13.4 m)
Roadway width41 ft (12.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic6,080 (2023)
Projected traffic7,689 by 2039
Trucks21%
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$1.7 million (2022 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was US 97 over Swauk Creek built?

It was built in 1993, making it 32 years old in 2025.

What condition is US 97 over Swauk 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 July 2024.

How much traffic does US 97 over Swauk Creek carry?

About 6,080 vehicles per day (2023 count), of which roughly 21% are trucks.

How long is US 97 over Swauk Creek?

The structure is 85 ft (25.8 m) long with a longest span of 80 ft (24.3 m) and a deck 44 ft wide.

Who owns US 97 over Swauk Creek?

It is owned by the State Highway Agency.