US Bridges

Road over North Fork Sprague River

Good

Klamath County, Oregon · No Data Entered · Structure no. 060201000012790

Built
2010
15 years old
Condition
Good
inspected September 2024
Type
Box Beam or Girders - Multiple
Prestressed Concrete
Length
93 ft
1 main span
Daily traffic
40
2005 count
Owner
Federal
U.S. Forest Service

About this bridge

Road over North Fork Sprague River is a prestressed concrete box beam or girders - multiple carrying Road over North Fork Sprague River in Klamath County, Oregon. It was built in 2010, so it is 15 years old, younger than the Oregon average of 49.9 years.

The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 40 vehicles a day, projected to reach 60 by 2045. The structure is 93 ft (28.3 m) long and 20 ft wide. If it were closed, the detour would be 98.2 mi (158 km).

CarriesRoad
CrossesNorth Fork Sprague River
LocationNo Data Entered
RouteFederal Lands Road 34110
StateOregon
Coordinates42.4968, -121.0081
Functional classRural Local

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Deck8 Very GoodNo problems noted.
Superstructure7 GoodSome minor problems.
Substructure8 Very GoodNo problems noted.
Channel and channel protection7 GoodSome minor problems.
Last inspectionSeptember 2024
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourFoundations on dry land well above flood water elevations
Structural evaluation7: Better than present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment3: Basically intolerable, requiring high priority of corrective action
Operating rating76.1 US tons
Inventory rating59 US tons

Structure

MaterialPrestressed Concrete
DeckOther
Main spans1
Design loadHL 93
Structure length93 ft (28.3 m)
Longest span90 ft (27.4 m)
Deck width20 ft (6.1 m)
Roadway width20 ft (6.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic40 (2005)
Projected traffic60 by 2045
Trucks—
Lanes on structure1
Traffic directionOne-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 North Fork Sprague River built?

It was built in 2010, making it 15 years old in 2025.

What condition is Road over North Fork Sprague River in?

The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in September 2024.

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

About 40 vehicles per day (2005 count).

How long is Road over North Fork Sprague River?

The structure is 93 ft (28.3 m) long with a longest span of 90 ft (27.4 m) and a deck 20 ft wide.

Who owns Road over North Fork Sprague River?

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