US Bridges

Wilson RD over North Fork Mosier Creek

FairPosted for load

Wasco County, Oregon · 0.1 MI S of Mosier Crk RD · Structure no. 65C74 415 00009

Built
1950
75 years old
Condition
Fair
inspected August 2024
Type
Stringer/Multi-beam or Girder
Wood or Timber
Length
25 ft
1 main span
Daily traffic
55
2020 count
Owner
County
County Highway Agency

About this bridge

Wilson RD over North Fork Mosier Creek is a wood or timber stringer/multi-beam or girder carrying Wilson RD over North Fork Mosier Creek in Wasco County, Oregon. It was built in 1950, so it is 75 years old, older 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. Its operating status is: posted for load restriction.

It carries about 55 vehicles a day, roughly 1% of them trucks, projected to reach 65 by 2025. The structure is 25 ft (7.6 m) long and 21 ft wide. If it were closed, the detour would be 5 mi (8 km).

CarriesWilson RD
CrossesNorth Fork Mosier Creek
Location0.1 MI S of Mosier Crk RD
RouteCounty Highway 0
StateOregon
Coordinates45.64799, -121.37888
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
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionAugust 2024
Inspection intervalevery 12 months
Operating statusPosted for load restriction
ScourScour critical; foundations unstable for calculated scour conditions
Structural evaluation3: Basically intolerable, requiring high priority of corrective action
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating11.5 US tons
Inventory rating8.9 US tons

Structure

MaterialWood or Timber
DeckWood or timber
Main spans1
Design loadH 15
Structure length25 ft (7.6 m)
Longest span23 ft (7 m)
Deck width21 ft (6.5 m)
Roadway width20 ft (6.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic55 (2020)
Projected traffic65 by 2025
Trucks1%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed5 mi (8 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 proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was Wilson RD over North Fork Mosier Creek built?

It was built in 1950, making it 75 years old in 2025.

What condition is Wilson RD over North Fork Mosier 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 August 2024.

How much traffic does Wilson RD over North Fork Mosier Creek carry?

About 55 vehicles per day (2020 count), of which roughly 1% are trucks.

How long is Wilson RD over North Fork Mosier Creek?

The structure is 25 ft (7.6 m) long with a longest span of 23 ft (7 m) and a deck 21 ft wide.

Who owns Wilson RD over North Fork Mosier Creek?

It is owned by the County Highway Agency.