US Bridges

Old Barn RD/5230 over Four Mile Creek

FairPosted for load

Whitman County, Washington · 0.05 MI N Viola · Structure no. 083454000000000

Built
1900
125 years old, rebuilt 1947
Condition
Fair
inspected December 2024
Type
Stringer/Multi-beam or Girder
Wood or Timber
Length
25 ft
1 main span
Daily traffic
6
2022 count
Owner
County
County Highway Agency

About this bridge

Old Barn RD/5230 over Four Mile Creek is a wood or timber stringer/multi-beam or girder carrying Old Barn RD/5230 over Four Mile Creek in Whitman County, Washington. It was built in 1900 and reconstructed in 1947, so it is 125 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. Its operating status is: posted for load restriction.

It carries about 6 vehicles a day, roughly 14% of them trucks, projected to reach 7 by 2044. The structure is 25 ft (7.6 m) long and 20 ft wide. If it were closed, the detour would be 98.8 mi (159 km).

CarriesOld Barn RD/5230
CrossesFour Mile Creek
Location0.05 MI N Viola
RouteCounty Highway 52300
Coordinates46.84697, -117.096
Functional classRural Local

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.
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 inspectionDecember 2024
Inspection intervalevery 12 months
Operating statusPosted for load restriction
ScourUnknown foundation; not evaluated for scour
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating34.9 US tons
Inventory rating25 US tons

Structure

MaterialWood or Timber
DeckWood or timber
Main spans1
Design loadH 15
Structure length25 ft (7.6 m)
Longest span24 ft (7.3 m)
Deck width20 ft (6.1 m)
Roadway width20 ft (6.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic6 (2022)
Projected traffic7 by 2044
Trucks14%
Lanes on structure2
Traffic directionTwo-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 statusNot eligible for the National Register of Historic Places
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 Old Barn RD/5230 over Four Mile Creek built?

It was built in 1900, making it 125 years old in 2025. It was reconstructed in 1947.

What condition is Old Barn RD/5230 over Four Mile 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 December 2024.

How much traffic does Old Barn RD/5230 over Four Mile Creek carry?

About 6 vehicles per day (2022 count), of which roughly 14% are trucks.

How long is Old Barn RD/5230 over Four Mile Creek?

The structure is 25 ft (7.6 m) long with a longest span of 24 ft (7.3 m) and a deck 20 ft wide.

Who owns Old Barn RD/5230 over Four Mile Creek?

It is owned by the County Highway Agency.