US Bridges

County RD 387 over South Umpqua River

Fair

Douglas County, Oregon · At S Winston City Limits · Structure no. 19C515 387 066

Built
1953
72 years old
Condition
Fair
inspected April 2023
Type
Girder and Floorbeam System
Steel Continuous
Length
506 ft
3 main spans
Daily traffic
16,502
2020 count
Owner
County
County Highway Agency

About this bridge

County RD 387 over South Umpqua River is a steel continuous girder and floorbeam system carrying County RD 387 over South Umpqua River in Douglas County, Oregon. It was built in 1953, so it is 72 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.

It carries about 16,502 vehicles a day, roughly 20% of them trucks, projected to reach 22,964 by 2025. The structure is 506 ft (154.2 m) long and 39 ft wide. If it were closed, the detour would be 6.8 mi (11 km).

Location

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CarriesCounty RD 387
CrossesSouth Umpqua River
LocationAt S Winston City Limits
RouteCounty Highway 0A412
CountyDouglas County
StateOregon
Coordinates43.1133, -123.417
Functional classRural Minor Arterial

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection7 GoodSome minor problems.
Last inspectionApril 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation3: Basically intolerable, requiring high priority of corrective action
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating19.3 US tons
Inventory rating15 US tons

Structure

Structure typeGirder and Floorbeam System
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans3 (+2 approach)
Design loadHS 20
Structure length506 ft (154.2 m)
Longest span160 ft (48.8 m)
Deck width39 ft (12 m)
Roadway width30 ft (9.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic16,502 (2020)
Projected traffic22,964 by 2025
Trucks20%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
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 County RD 387 over South Umpqua River built?

It was built in 1953, making it 72 years old in 2025.

What condition is County RD 387 over South Umpqua River 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 April 2023.

How much traffic does County RD 387 over South Umpqua River carry?

About 16,502 vehicles per day (2020 count), of which roughly 20% are trucks.

How long is County RD 387 over South Umpqua River?

The structure is 506 ft (154.2 m) long with a longest span of 160 ft (48.8 m) and a deck 39 ft wide.

Who owns County RD 387 over South Umpqua River?

It is owned by the County Highway Agency.