US Bridges

Road over Dairy Creek

Fair

Lake County, Oregon · No Data Entered · Structure no. 060203000001000

Built
1957
68 years old
Condition
Fair
inspected August 2023
Type
Stringer/Multi-beam or Girder
Wood or Timber
Length
61 ft
3 main spans
Daily traffic
50
1991 count
Owner
Federal
U.S. Forest Service

About this bridge

Road over Dairy Creek is a wood or timber stringer/multi-beam or girder carrying Road over Dairy Creek in Lake County, Oregon. It was built in 1957, so it is 68 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 50 vehicles a day, projected to reach 75 by 2045. The structure is 61 ft (18.5 m) long and 16 ft wide. If it were closed, the detour would be 5 mi (8 km).

Location

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CarriesRoad
CrossesDairy Creek
LocationNo Data Entered
RouteFederal Lands Road 28000
CountyLake County
StateOregon
Coordinates42.46783, -121.6415
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.
Superstructure7 GoodSome minor problems.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection7 GoodSome minor problems.
Last inspectionAugust 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
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 alignment6: Equal to present minimum criteria
Operating rating46.2 US tons
Inventory rating34.5 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialWood or Timber
DeckWood or timber
Main spans3
Design loadOther
Structure length61 ft (18.5 m)
Longest span42 ft (12.8 m)
Deck width16 ft (4.8 m)
Roadway width14 ft (4.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic50 (1991)
Projected traffic75 by 2045
Trucks—
Lanes on structure1
Traffic directionOne-lane bridge for two-way traffic
CarriesHighway
CrossesWaterway
Detour if closed5 mi (8 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerU.S. Forest Service
Maintained byU.S. Forest Service
Historic statusHistorical significance not determinable at this time
Work proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was Road over Dairy Creek built?

It was built in 1957, making it 68 years old in 2025.

What condition is Road over Dairy 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 2023.

How much traffic does Road over Dairy Creek carry?

About 50 vehicles per day (1991 count).

How long is Road over Dairy Creek?

The structure is 61 ft (18.5 m) long with a longest span of 42 ft (12.8 m) and a deck 16 ft wide.

Who owns Road over Dairy Creek?

It is owned by the U.S. Forest Service.