US Bridges

State Route 96 over Klamath River

Good

Siskiyou County, California · 02-SIS-096-61.14 · Structure no. 02 0119

Built
1954
71 years old
Condition
Good
inspected September 2024
Type
Truss - Thru
Steel
Length
384 ft
1 main span
Daily traffic
600
2015 count
Owner
State
State Highway Agency

About this bridge

State Route 96 over Klamath River is a steel truss - thru carrying State Route 96 over Klamath River in Siskiyou County, California. It was built in 1954, so it is 71 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 600 vehicles a day, roughly 10% of them trucks, projected to reach 735 by 2046. The structure is 384 ft (117 m) long and 30 ft wide. If it were closed, the detour would be 49.7 mi (80 km).

CarriesState Route 96
CrossesKlamath River
Location02-SIS-096-61.14
RouteState Highway 96
Coordinates41.8348, -123.18244
Functional classRural Minor Arterial

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 protection7 GoodSome minor problems.
Last inspectionSeptember 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than 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 alignment8: Equal to present desirable criteria
Operating rating60.4 US tons
Inventory rating36 US tons

Structure

Structure typeTruss - Thru
MaterialSteel
DeckConcrete, cast-in-place
Main spans1 (+3 approach)
Design loadHS 20
Structure length384 ft (117 m)
Longest span191 ft (58.2 m)
Deck width30 ft (9 m)
Roadway width26 ft (7.9 m)
Vertical clearance over deck16 ft (4.9 m)

Traffic and service

Average daily traffic600 (2015)
Projected traffic735 by 2046
Trucks10%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed49.7 mi (80 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerState Highway Agency
Maintained byState 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 State Route 96 over Klamath River built?

It was built in 1954, making it 71 years old in 2025.

What condition is State Route 96 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 September 2024.

How much traffic does State Route 96 over Klamath River carry?

About 600 vehicles per day (2015 count), of which roughly 10% are trucks.

How long is State Route 96 over Klamath River?

The structure is 384 ft (117 m) long with a longest span of 191 ft (58.2 m) and a deck 30 ft wide.

Who owns State Route 96 over Klamath River?

It is owned by the State Highway Agency.