US Bridges

French Prairie RD over Champoeg CR

FairPosted for load

Marion County, Oregon · MP #68 0.25 S CR 501 · Structure no. 05492 068 01652

Built
1955
70 years old
Condition
Fair
inspected August 2024
Type
Tee Beam
Concrete
Length
25 ft
1 main span
Daily traffic
31,900
2018 count
Owner
County
County Highway Agency

About this bridge

French Prairie RD over Champoeg CR is a concrete tee beam carrying French Prairie RD over Champoeg CR in Marion County, Oregon. It was built in 1955, so it is 70 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 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 other load-capacity restriction.

It carries about 31,900 vehicles a day, roughly 2% of them trucks, projected to reach 39,200 by 2038. The structure is 25 ft (7.6 m) long and 31 ft wide. If it were closed, the detour would be 6.2 mi (10 km).

Location

Open in Google Maps
CarriesFrench Prairie RD
CrossesChampoeg CR
LocationMP #68 0.25 S CR 501
RouteCounty Highway C0068
CountyMarion County
StateOregon
Coordinates45.16304, -122.9475
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
Deck8 Very GoodNo problems noted.
Superstructure8 Very GoodNo problems noted.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionAugust 2024
Inspection intervalevery 24 months
Operating statusPosted for other load-capacity restriction
ScourUnknown foundation; not evaluated for scour
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry2: Basically intolerable, requiring high priority of replacement
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating34 US tons
Inventory rating26.1 US tons

Structure

Structure typeTee Beam
MaterialConcrete
DeckConcrete, cast-in-place
Main spans1
Design loadH 20
Structure length25 ft (7.6 m)
Longest span22 ft (6.7 m)
Deck width31 ft (9.6 m)
Roadway width28 ft (8.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic31,900 (2018)
Projected traffic39,200 by 2038
Trucks2%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed6.2 mi (10 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$166,000
NavigationNo navigation control on waterway

Frequently asked questions

When was French Prairie RD over Champoeg CR built?

It was built in 1955, making it 70 years old in 2025.

What condition is French Prairie RD over Champoeg CR 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 French Prairie RD over Champoeg CR carry?

About 31,900 vehicles per day (2018 count), of which roughly 2% are trucks.

How long is French Prairie RD over Champoeg CR?

The structure is 25 ft (7.6 m) long with a longest span of 22 ft (6.7 m) and a deck 31 ft wide.

Who owns French Prairie RD over Champoeg CR?

It is owned by the County Highway Agency.