US Bridges

County RD 379 over Berry Creek Dam Spillway

Fair

Douglas County, Oregon · 5.3 MI S of Tenmile · Structure no. 19C424037900031

Built
1979
46 years old
Condition
Fair
inspected July 2023
Type
Slab
Prestressed Concrete
Length
59 ft
1 main span
Daily traffic
4
2020 count
Owner
County
County Highway Agency

About this bridge

County RD 379 over Berry Creek Dam Spillway is a prestressed concrete slab carrying County RD 379 over Berry Creek Dam Spillway in Douglas County, Oregon. It was built in 1979, so it is 46 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 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 4 vehicles a day, roughly 2% of them trucks, projected to reach 4 by 2025. The structure is 59 ft (18 m) long and 16 ft wide. If it were closed, the detour would be 123.7 mi (199 km).

Location

Open in Google Maps
CarriesCounty RD 379
CrossesBerry Creek Dam Spillway
Location5.3 MI S of Tenmile
RouteCounty Highway C0379
CountyDouglas County
StateOregon
Coordinates43.0378, -123.55388
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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
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 inspectionJuly 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourScour critical; foundations unstable for calculated scour conditions
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
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 rating44 US tons
Inventory rating34 US tons

Structure

Structure typeSlab
MaterialPrestressed Concrete
DeckOther
Main spans1
Design loadHS 20
Structure length59 ft (18 m)
Longest span56 ft (17.1 m)
Deck width16 ft (4.9 m)
Roadway width12 ft (3.7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic4 (2020)
Projected traffic4 by 2025
Trucks2%
Lanes on structure1
Traffic directionOne-lane bridge for two-way traffic
CarriesHighway
CrossesWaterway
Detour if closed123.7 mi (199 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 379 over Berry Creek Dam Spillway built?

It was built in 1979, making it 46 years old in 2025.

What condition is County RD 379 over Berry Creek Dam Spillway 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 July 2023.

How much traffic does County RD 379 over Berry Creek Dam Spillway carry?

About 4 vehicles per day (2020 count), of which roughly 2% are trucks.

How long is County RD 379 over Berry Creek Dam Spillway?

The structure is 59 ft (18 m) long with a longest span of 56 ft (17.1 m) and a deck 16 ft wide.

Who owns County RD 379 over Berry Creek Dam Spillway?

It is owned by the County Highway Agency.