US Bridges

Kirby-Mayview Road over Casey Creek

Fair

Garfield County, Washington · Snake River · Structure no. 083165000000000

Built
1979
46 years old
Condition
Fair
inspected August 2024
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
40 ft
1 main span
Daily traffic
350
2020 count
Owner
County
County Highway Agency

About this bridge

Kirby-Mayview Road over Casey Creek is a prestressed concrete stringer/multi-beam or girder carrying Kirby-Mayview Road over Casey Creek in Garfield County, Washington. It was built in 1979, so it is 46 years old, younger than the Washington average of 49.8 years.

The most recent inspection reported to the Federal Highway Administration rates it in fair condition with a lowest component rating of 6 out of 9. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

It carries about 350 vehicles a day, roughly 5% of them trucks, projected to reach 350 by 2040. The structure is 40 ft (12.2 m) long and 32 ft wide. If it were closed, the detour would be 54.1 mi (87 km).

CarriesKirby-Mayview Road
CrossesCasey Creek
LocationSnake River
RouteCounty Highway 41000
Coordinates46.67817, -117.50482
Functional classRural Major Collector

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure7 GoodSome minor problems.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionAugust 2024
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 geometry6: Equal to present minimum criteria
Waterway adequacy5: Somewhat better than minimum adequacy to tolerate being left in place as is
Approach roadway alignment6: Equal to present minimum criteria
Operating rating48.6 US tons
Inventory rating28.9 US tons

Structure

MaterialPrestressed Concrete
DeckOther
Main spans1
Design loadHS 20
Structure length40 ft (12.2 m)
Longest span37 ft (11.2 m)
Deck width32 ft (9.8 m)
Roadway width31 ft (9.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic350 (2020)
Projected traffic350 by 2040
Trucks5%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed54.1 mi (87 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCounty Highway Agency
Maintained byCounty Highway Agency
Historic statusHistorical significance not determinable at this time
Work proposedOther structural work, including hydraulic replacements
Estimated improvement cost$570,000 (2022 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Kirby-Mayview Road over Casey Creek built?

It was built in 1979, making it 46 years old in 2025.

What condition is Kirby-Mayview Road over Casey Creek in?

The National Bridge Inventory rates it in fair condition. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound. The last reported inspection was in August 2024.

How much traffic does Kirby-Mayview Road over Casey Creek carry?

About 350 vehicles per day (2020 count), of which roughly 5% are trucks.

How long is Kirby-Mayview Road over Casey Creek?

The structure is 40 ft (12.2 m) long with a longest span of 37 ft (11.2 m) and a deck 32 ft wide.

Who owns Kirby-Mayview Road over Casey Creek?

It is owned by the County Highway Agency.