US Bridges

Mattson Road over Swale Creek

Good

Klickitat County, Washington · 0.7 S JCT CR 22000 · Structure no. 086254000000000

Built
1995
30 years old
Condition
Good
inspected July 2023
Type
Slab
Concrete Continuous
Length
70 ft
3 main spans
Daily traffic
2
2023 count
Owner
County
County Highway Agency

About this bridge

Mattson Road over Swale Creek is a concrete continuous slab carrying Mattson Road over Swale Creek in Klickitat County, Washington. It was built in 1995, so it is 30 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 2 vehicles a day, roughly 30% of them trucks, projected to reach 2 by 2045. The structure is 70 ft (21.3 m) long and 31 ft wide. If it were closed, the detour would be 6.2 mi (10 km).

Location

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CarriesMattson Road
CrossesSwale Creek
Location0.7 S JCT CR 22000
RouteCounty Highway 23150
CountyKlickitat County
StateWashington
Coordinates45.72828, -120.96829
Functional classRural Local

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
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation6: Equal to present minimum criteria
Deck geometry7: Better than present minimum criteria
Waterway adequacy5: Somewhat better than minimum adequacy to tolerate being left in place as is
Approach roadway alignment8: Equal to present desirable criteria
Operating rating34.3 US tons
Inventory rating26.5 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length70 ft (21.3 m)
Longest span27 ft (8.2 m)
Deck width31 ft (9.5 m)
Roadway width28 ft (8.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic2 (2023)
Projected traffic2 by 2045
Trucks30%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed6.2 mi (10 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 proposedOther structural work, including hydraulic replacements
Estimated improvement cost$998,000 (2022 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Mattson Road over Swale Creek built?

It was built in 1995, making it 30 years old in 2025.

What condition is Mattson Road over Swale 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 2023.

How much traffic does Mattson Road over Swale Creek carry?

About 2 vehicles per day (2023 count), of which roughly 30% are trucks.

How long is Mattson Road over Swale Creek?

The structure is 70 ft (21.3 m) long with a longest span of 27 ft (8.2 m) and a deck 31 ft wide.

Who owns Mattson Road over Swale Creek?

It is owned by the County Highway Agency.