US Bridges

S Fk Walla Walla over Flume Canyon

Fair

Umatilla County, Oregon · 4.3 MI SE Walla Walla RD · Structure no. 59C437060000425

Built
1996
29 years old
Condition
Fair
inspected July 2023
Type
Stringer/Multi-beam or Girder
Wood or Timber
Length
22 ft
1 main span
Daily traffic
193
2020 count
Owner
County
County Highway Agency

About this bridge

S Fk Walla Walla over Flume Canyon is a wood or timber stringer/multi-beam or girder carrying S Fk Walla Walla over Flume Canyon in Umatilla County, Oregon. It was built in 1996, so it is 29 years old, younger than the Oregon average of 49.9 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 193 vehicles a day, roughly 10% of them trucks, projected to reach 224 by 2025. The structure is 22 ft (6.7 m) long and 31 ft wide. If it were closed, the detour would be 123.7 mi (199 km).

Location

Open in Google Maps
CarriesS Fk Walla Walla
CrossesFlume Canyon
Location4.3 MI SE Walla Walla RD
RouteCounty Highway 0
CountyUmatilla County
StateOregon
Coordinates45.8636, -118.2299
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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection7 GoodSome minor problems.
Last inspectionJuly 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourUnknown foundation; not evaluated for scour
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry6: Equal to present minimum criteria
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating27.1 US tons
Inventory rating21.1 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialWood or Timber
DeckWood or timber
Main spans1
Design loadHS 20
Structure length22 ft (6.7 m)
Longest span20 ft (6.1 m)
Deck width31 ft (9.3 m)
Roadway width29 ft (8.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic193 (2020)
Projected traffic224 by 2025
Trucks10%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed123.7 mi (199 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 proposedWidening of existing bridge without deck rehabilitation
Estimated improvement cost$113,000
NavigationNo navigation control on waterway

Frequently asked questions

When was S Fk Walla Walla over Flume Canyon built?

It was built in 1996, making it 29 years old in 2025.

What condition is S Fk Walla Walla over Flume Canyon 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 July 2023.

How much traffic does S Fk Walla Walla over Flume Canyon carry?

About 193 vehicles per day (2020 count), of which roughly 10% are trucks.

How long is S Fk Walla Walla over Flume Canyon?

The structure is 22 ft (6.7 m) long with a longest span of 20 ft (6.1 m) and a deck 31 ft wide.

Who owns S Fk Walla Walla over Flume Canyon?

It is owned by the County Highway Agency.