US Bridges

Independence Road over Klamath River

Good

Siskiyou County, California · Clear Creek · Structure no. 050552000001046

Built
1966
59 years old
Condition
Good
inspected August 2023
Type
Stringer/Multi-beam or Girder
Steel
Length
567 ft
4 main spans
Daily traffic
50
Owner
Federal
U.S. Forest Service

About this bridge

Independence Road over Klamath River is a steel stringer/multi-beam or girder carrying Independence Road over Klamath River in Siskiyou County, California. It was built in 1966, so it is 59 years old, older than the California average of 54.8 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 50 vehicles a day, projected to reach 75 by 2045. The structure is 567 ft (172.7 m) long and 25 ft wide.

CarriesIndependence Road
CrossesKlamath River
LocationClear Creek
RouteFederal Lands Road 15N17
Coordinates41.65916, -123.44958
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
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
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 evaluation7: Better than present minimum criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating62.5 US tons
Inventory rating48.2 US tons

Structure

MaterialSteel
DeckConcrete, cast-in-place
Main spans4
Design loadHS 20
Structure length567 ft (172.7 m)
Longest span240 ft (73.2 m)
Deck width25 ft (7.6 m)
Roadway width24 ft (7.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic50 (—)
Projected traffic75 by 2045
Trucks—
Lanes on structure1
Traffic directionOne-lane bridge for two-way traffic
CarriesHighway
CrossesWaterway
Detour if closed—
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 Independence Road over Klamath River built?

It was built in 1966, making it 59 years old in 2025.

What condition is Independence Road over Klamath 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 August 2023.

How much traffic does Independence Road over Klamath River carry?

About 50 vehicles per day (latest count).

How long is Independence Road over Klamath River?

The structure is 567 ft (172.7 m) long with a longest span of 240 ft (73.2 m) and a deck 25 ft wide.

Who owns Independence Road over Klamath River?

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