US Bridges

Selbu CHURCH/7075 over Mud Flat Creek

Fair

Whitman County, Washington · 0.67 MI NE Hay-Lacrosse · Structure no. 080519000000000

Built
1979
46 years old
Condition
Fair
inspected November 2024
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
30 ft
1 main span
Daily traffic
47
2020 count
Owner
County
County Highway Agency

About this bridge

Selbu CHURCH/7075 over Mud Flat Creek is a prestressed concrete stringer/multi-beam or girder carrying Selbu CHURCH/7075 over Mud Flat Creek in Whitman 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 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 47 vehicles a day, roughly 25% of them trucks, projected to reach 47 by 2039. The structure is 30 ft (9.1 m) long and 28 ft wide. If it were closed, the detour would be 23 mi (37 km).

CarriesSelbu CHURCH/7075
CrossesMud Flat Creek
Location0.67 MI NE Hay-Lacrosse
RouteCounty Highway 70750
Coordinates46.7343, -117.84932
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
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionNovember 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating36 US tons
Inventory rating21.1 US tons

Structure

MaterialPrestressed Concrete
DeckConcrete, precast panels
Main spans1
Design loadHS 20
Structure length30 ft (9.1 m)
Longest span29 ft (8.8 m)
Deck width28 ft (8.5 m)
Roadway width28 ft (8.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic47 (2020)
Projected traffic47 by 2039
Trucks25%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed23 mi (37 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$1.4 million (2022 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Selbu CHURCH/7075 over Mud Flat Creek built?

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

What condition is Selbu CHURCH/7075 over Mud 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 November 2024.

How much traffic does Selbu CHURCH/7075 over Mud Flat Creek carry?

About 47 vehicles per day (2020 count), of which roughly 25% are trucks.

How long is Selbu CHURCH/7075 over Mud Flat Creek?

The structure is 30 ft (9.1 m) long with a longest span of 29 ft (8.8 m) and a deck 28 ft wide.

Who owns Selbu CHURCH/7075 over Mud Flat Creek?

It is owned by the County Highway Agency.