US Bridges

State Road over Mosier Creek

Fair

Wasco County, Oregon · Mosier · Structure no. 00118A000 00064

Built
1989
36 years old
Condition
Fair
inspected August 2024
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
252 ft
2 main spans
Daily traffic
1,111
2020 count
Owner
County
County Highway Agency

About this bridge

State Road over Mosier Creek is a prestressed concrete stringer/multi-beam or girder carrying State Road over Mosier Creek in Wasco County, Oregon. It was built in 1989, so it is 36 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 1,111 vehicles a day, roughly 15% of them trucks, projected to reach 1,271 by 2025. The structure is 252 ft (76.8 m) long and 35 ft wide. If it were closed, the detour would be 6.8 mi (11 km).

Location

Open in Google Maps
CarriesState Road
CrossesMosier Creek
LocationMosier
RouteCounty Highway 0
CountyWasco County
StateOregon
Coordinates45.68036, -121.38631
Functional classRural Major 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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure7 GoodSome minor problems.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionAugust 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; action required to protect exposed foundations
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 rating57.5 US tons
Inventory rating44.3 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans2
Design loadHS 25 or greater
Structure length252 ft (76.8 m)
Longest span133 ft (40.5 m)
Deck width35 ft (10.6 m)
Roadway width32 ft (9.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,111 (2020)
Projected traffic1,271 by 2025
Trucks15%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed6.8 mi (11 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 State Road over Mosier Creek built?

It was built in 1989, making it 36 years old in 2025.

What condition is State Road over 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 State Road over Mosier Creek carry?

About 1,111 vehicles per day (2020 count), of which roughly 15% are trucks.

How long is State Road over Mosier Creek?

The structure is 252 ft (76.8 m) long with a longest span of 133 ft (40.5 m) and a deck 35 ft wide.

Who owns State Road over Mosier Creek?

It is owned by the County Highway Agency.