US Bridges

County RD 7 over Yoncalla Creek

Fair

Douglas County, Oregon · 0.5 MI SE of Yoncalla · Structure no. 19C054 7 030

Built
1963
62 years old
Condition
Fair
inspected October 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
77 ft
3 main spans
Daily traffic
1,358
2020 count
Owner
County
County Highway Agency

About this bridge

County RD 7 over Yoncalla Creek is a steel stringer/multi-beam or girder carrying County RD 7 over Yoncalla Creek in Douglas County, Oregon. It was built in 1963, so it is 62 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.

It carries about 1,358 vehicles a day, roughly 5% of them trucks, projected to reach 1,538 by 2025. The structure is 77 ft (23.5 m) long and 26 ft wide. If it were closed, the detour would be 11.2 mi (18 km).

Location

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CarriesCounty RD 7
CrossesYoncalla Creek
Location0.5 MI SE of Yoncalla
RouteCounty Highway 0A406
CountyDouglas County
StateOregon
Coordinates43.59408, -123.27558
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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionOctober 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourUnknown foundation; not evaluated for scour
Structural evaluation6: Equal to present minimum criteria
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating70 US tons
Inventory rating53.9 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans3
Design loadH 20
Structure length77 ft (23.5 m)
Longest span25 ft (7.6 m)
Deck width26 ft (7.9 m)
Roadway width24 ft (7.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,358 (2020)
Projected traffic1,538 by 2025
Trucks5%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed11.2 mi (18 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 proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was County RD 7 over Yoncalla Creek built?

It was built in 1963, making it 62 years old in 2025.

What condition is County RD 7 over Yoncalla 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 October 2024.

How much traffic does County RD 7 over Yoncalla Creek carry?

About 1,358 vehicles per day (2020 count), of which roughly 5% are trucks.

How long is County RD 7 over Yoncalla Creek?

The structure is 77 ft (23.5 m) long with a longest span of 25 ft (7.6 m) and a deck 26 ft wide.

Who owns County RD 7 over Yoncalla Creek?

It is owned by the County Highway Agency.