US Bridges

Uniontwn EAST/9410 over Union Flat Creek

Fair

Whitman County, Washington · 0.30 MI NE SR 195 · Structure no. 080416000000000

Built
1962
63 years old
Condition
Fair
inspected January 2024
Type
Tee Beam
Prestressed Concrete
Length
47 ft
1 main span
Daily traffic
571
2021 count
Owner
City
City or Municipal Highway Agency

About this bridge

Uniontwn EAST/9410 over Union Flat Creek is a prestressed concrete tee beam carrying Uniontwn EAST/9410 over Union Flat Creek in Whitman County, Washington. It was built in 1962, so it is 63 years old, older 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 5 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 571 vehicles a day, roughly 29% of them trucks, projected to reach 571 by 2044. The structure is 47 ft (14.3 m) long and 28 ft wide. If it were closed, the detour would be 46 mi (74 km).

Location

Open in Google Maps
CarriesUniontwn EAST/9410
CrossesUnion Flat Creek
Location0.30 MI NE SR 195
RouteCounty Highway 1340
CountyWhitman County
StateWashington
Coordinates46.54215, -117.0823
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
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure7 GoodSome minor problems.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionJanuary 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourCountermeasures installed to correct a previously existing problem
Structural evaluation6: Equal to 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 rating51.8 US tons
Inventory rating33.2 US tons

Structure

Structure typeTee Beam
MaterialPrestressed Concrete
DeckOther
Main spans1
Design loadHS 15
Structure length47 ft (14.3 m)
Longest span46 ft (13.9 m)
Deck width28 ft (8.5 m)
Roadway width28 ft (8.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic571 (2021)
Projected traffic571 by 2044
Trucks29%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed46 mi (74 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCity or Municipal Highway Agency
Maintained byCity or Municipal Highway Agency
Historic statusHistorical significance not determinable at this time
Work proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$2.1 million (2022 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Uniontwn EAST/9410 over Union Flat Creek built?

It was built in 1962, making it 63 years old in 2025.

What condition is Uniontwn 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 2024.

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

About 571 vehicles per day (2021 count), of which roughly 29% are trucks.

How long is Uniontwn EAST/9410 over Union Flat Creek?

The structure is 47 ft (14.3 m) long with a longest span of 46 ft (13.9 m) and a deck 28 ft wide.

Who owns Uniontwn EAST/9410 over Union Flat Creek?

It is owned by the City or Municipal Highway Agency.