US Bridges

KLEMGARD/9480 over Union Flat Creek

GoodPosted for load

Whitman County, Washington · 0.12 MI SW Wawawai-Pullmn · Structure no. 081975000000000

Built
1973
52 years old
Condition
Good
inspected January 2025
Type
Tee Beam
Prestressed Concrete
Length
80 ft
1 main span
Daily traffic
407
2021 count
Owner
County
County Highway Agency

About this bridge

KLEMGARD/9480 over Union Flat Creek is a prestressed concrete tee beam carrying KLEMGARD/9480 over Union Flat Creek in Whitman County, Washington. It was built in 1973, so it is 52 years old, older 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. Its operating status is: posted for load restriction.

It carries about 407 vehicles a day, roughly 25% of them trucks, projected to reach 407 by 2042. The structure is 80 ft (24.4 m) long and 28 ft wide. If it were closed, the detour would be 9.9 mi (16 km).

CarriesKLEMGARD/9480
CrossesUnion Flat Creek
Location0.12 MI SW Wawawai-Pullmn
RouteCounty Highway 94800
Coordinates46.69057, -117.27668
Functional classRural Minor Collector

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 inspectionJanuary 2025
Inspection intervalevery 24 months
Operating statusPosted for load restriction
ScourScour critical; foundations unstable for calculated scour conditions
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 rating33.6 US tons
Inventory rating25.4 US tons

Structure

Structure typeTee Beam
MaterialPrestressed Concrete
DeckOther
Main spans1
Design loadHS 20
Structure length80 ft (24.4 m)
Longest span79 ft (24.1 m)
Deck width28 ft (8.5 m)
Roadway width28 ft (8.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic407 (2021)
Projected traffic407 by 2042
Trucks25%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed9.9 mi (16 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$3.2 million (2022 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was KLEMGARD/9480 over Union Flat Creek built?

It was built in 1973, making it 52 years old in 2025.

What condition is KLEMGARD/9480 over Union Flat 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 January 2025.

How much traffic does KLEMGARD/9480 over Union Flat Creek carry?

About 407 vehicles per day (2021 count), of which roughly 25% are trucks.

How long is KLEMGARD/9480 over Union Flat Creek?

The structure is 80 ft (24.4 m) long with a longest span of 79 ft (24.1 m) and a deck 28 ft wide.

Who owns KLEMGARD/9480 over Union Flat Creek?

It is owned by the County Highway Agency.