US Bridges

I 5 SB over E96-N5 Con Klamath River

Good

Siskiyou County, California · 02-SIS-005-R58.18L · Structure no. 02 0134L

Built
1969
56 years old
Condition
Good
inspected September 2024
Type
Stringer/Multi-beam or Girder
Prestressed Concrete Continuous
Length
862 ft
8 main spans
Daily traffic
7,300
2015 count
Owner
State
State Highway Agency

About this bridge

I 5 SB over E96-N5 Con Klamath River is a prestressed concrete continuous stringer/multi-beam or girder carrying I 5 SB over E96-N5 Con Klamath River in Siskiyou County, California. It was built in 1969, so it is 56 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 7,300 vehicles a day, roughly 31% of them trucks, projected to reach 11,247 by 2042. The structure is 862 ft (262.7 m) long and 41 ft wide. If it were closed, the detour would be 28 mi (45 km).

CarriesI 5 SB
CrossesE96-N5 Con Klamath River
Location02-SIS-005-R58.18L
RouteInterstate 5
Coordinates41.85585, -122.57184
Functional classRural Principal Arterial - Interstate

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 evaluation6: Equal to present minimum criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating50 US tons
Inventory rating28.5 US tons

Structure

MaterialPrestressed Concrete Continuous
DeckConcrete, cast-in-place
Main spans8
Design loadHS 20 + Mod
Structure length862 ft (262.7 m)
Longest span121 ft (36.9 m)
Deck width41 ft (12.5 m)
Roadway width39 ft (11.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic7,300 (2015)
Projected traffic11,247 by 2042
Trucks31%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway
CrossesHighway and waterway
Detour if closed28 mi (45 km)
TollOn a free road
National Highway SystemYes
Strategic Highway NetworkInterstate STRAHNET route

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 I 5 SB over E96-N5 Con Klamath River built?

It was built in 1969, making it 56 years old in 2025.

What condition is I 5 SB over E96-N5 Con 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 I 5 SB over E96-N5 Con Klamath River carry?

About 7,300 vehicles per day (2015 count), of which roughly 31% are trucks.

How long is I 5 SB over E96-N5 Con Klamath River?

The structure is 862 ft (262.7 m) long with a longest span of 121 ft (36.9 m) and a deck 41 ft wide.

Who owns I 5 SB over E96-N5 Con Klamath River?

It is owned by the State Highway Agency.