US Bridges

Road over South Fork Sprague River

Fair

Klamath County, Oregon · No Data Entered · Structure no. 060201000001024

Built
1967
58 years old
Condition
Fair
inspected August 2023
Type
Slab
Prestressed Concrete
Length
73 ft
3 main spans
Daily traffic
84
Owner
Federal
U.S. Forest Service

About this bridge

Road over South Fork Sprague River is a prestressed concrete slab carrying Road over South Fork Sprague River in Klamath County, Oregon. It was built in 1967, so it is 58 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 84 vehicles a day, projected to reach 126 by 2045. The structure is 73 ft (22.1 m) long and 16 ft wide. If it were closed, the detour would be 98.2 mi (158 km).

Location

Open in Google Maps
CarriesRoad
CrossesSouth Fork Sprague River
LocationNo Data Entered
RouteFederal Lands Road 34000
CountyKlamath County
StateOregon
Coordinates42.3985, -120.99217
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 inspectionAugust 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; action required to protect exposed foundations
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry6: Equal to present minimum criteria
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating99.1 US tons
Inventory rating80 US tons

Structure

Structure typeSlab
MaterialPrestressed Concrete
DeckOther
Main spans3
Design loadOther
Structure length73 ft (22.1 m)
Longest span24 ft (7.3 m)
Deck width16 ft (4.9 m)
Roadway width15 ft (4.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic84 (—)
Projected traffic126 by 2045
Trucks—
Lanes on structure1
Traffic directionOne-lane bridge for two-way traffic
CarriesHighway
CrossesWaterway
Detour if closed98.2 mi (158 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 South Fork Sprague River built?

It was built in 1967, making it 58 years old in 2025.

What condition is Road over South Fork Sprague 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 August 2023.

How much traffic does Road over South Fork Sprague River carry?

About 84 vehicles per day (latest count).

How long is Road over South Fork Sprague River?

The structure is 73 ft (22.1 m) long with a longest span of 24 ft (7.3 m) and a deck 16 ft wide.

Who owns Road over South Fork Sprague River?

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