US Bridges

App Utwn EAST/9410 over Union Flat Creek

Fair

Whitman County, Washington · 0.54 MI E SR 195 · Structure no. 086643000000000

Built
2001
24 years old
Condition
Fair
inspected January 2025
Type
Tee Beam
Prestressed Concrete
Length
43 ft
1 main span
Daily traffic
5
2021 count
Owner
County
County Highway Agency

About this bridge

App Utwn EAST/9410 over Union Flat Creek is a prestressed concrete tee beam carrying App Utwn EAST/9410 over Union Flat Creek in Whitman County, Washington. It was built in 2001, so it is 24 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 5 vehicles a day, roughly 40% of them trucks, projected to reach 6 by 2042. The structure is 43 ft (13.1 m) long and 18 ft wide. If it were closed, the detour would be 98.8 mi (159 km).

Location

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CarriesApp Utwn EAST/9410
CrossesUnion Flat Creek
Location0.54 MI E SR 195
RouteCounty Highway 94100
CountyWhitman County
StateWashington
Coordinates46.54498, -117.07877
Functional classRural Minor 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.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionJanuary 2025
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Deck geometry3: Basically intolerable, requiring high priority of corrective action
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating54 US tons
Inventory rating32 US tons

Structure

Structure typeTee Beam
MaterialPrestressed Concrete
DeckOther
Main spans1
Design loadHS 20
Structure length43 ft (13.1 m)
Longest span42 ft (12.8 m)
Deck width18 ft (5.5 m)
Roadway width17 ft (5.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic5 (2021)
Projected traffic6 by 2042
Trucks40%
Lanes on structure1
Traffic directionOne-lane bridge for two-way traffic
CarriesHighway
CrossesWaterway
Detour if closed98.8 mi (159 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 proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$1.3 million (2022 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was App Utwn EAST/9410 over Union Flat Creek built?

It was built in 2001, making it 24 years old in 2025.

What condition is App Utwn EAST/9410 over Union Flat 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 January 2025.

How much traffic does App Utwn EAST/9410 over Union Flat Creek carry?

About 5 vehicles per day (2021 count), of which roughly 40% are trucks.

How long is App Utwn EAST/9410 over Union Flat Creek?

The structure is 43 ft (13.1 m) long with a longest span of 42 ft (12.8 m) and a deck 18 ft wide.

Who owns App Utwn EAST/9410 over Union Flat Creek?

It is owned by the County Highway Agency.