US Bridges

State Route 96 over Klamath River

Fair

Siskiyou County, California · 02-SIS-096-77.15 · Structure no. 02 0117

Built
1953
72 years old
Condition
Fair
inspected September 2024
Type
Truss - Thru
Steel
Length
419 ft
1 main span
Daily traffic
650
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 1953, so it is 72 years old, older than the California average of 54.8 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 650 vehicles a day, projected to reach 1,331 by 2042. The structure is 419 ft (127.7 m) long and 30 ft wide. If it were closed, the detour would be 73.9 mi (119 km).

Location

Open in Google Maps
CarriesState Route 96
CrossesKlamath River
Location02-SIS-096-77.15
RouteState Highway 96
CountySiskiyou County
StateCalifornia
Coordinates41.82676, -122.97829
Functional classRural Minor Arterial

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionSeptember 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourScour critical; foundations unstable for calculated scour conditions
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 alignment8: Equal to present desirable criteria
Operating rating68.2 US tons
Inventory rating40.7 US tons

Structure

Structure typeTruss - Thru
MaterialSteel
DeckConcrete, cast-in-place
Main spans1 (+3 approach)
Design loadHS 20
Structure length419 ft (127.7 m)
Longest span186 ft (56.7 m)
Deck width30 ft (9 m)
Roadway width26 ft (7.9 m)
Vertical clearance over deck16 ft (4.8 m)

Traffic and service

Average daily traffic650 (2015)
Projected traffic1,331 by 2042
Trucks0%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed73.9 mi (119 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 1953, making it 72 years old in 2025.

What condition is State Route 96 over Klamath 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 September 2024.

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

About 650 vehicles per day (2015 count).

How long is State Route 96 over Klamath River?

The structure is 419 ft (127.7 m) long with a longest span of 186 ft (56.7 m) and a deck 30 ft wide.

Who owns State Route 96 over Klamath River?

It is owned by the State Highway Agency.