US Bridges

Interstate 5 over Yreka Creek

Fair

Siskiyou County, California · 02-SIS-005-R46.79-YRE · Structure no. 02 0143

Built
1970
55 years old
Condition
Fair
inspected September 2024
Type
Tee Beam
Concrete Continuous
Length
88 ft
2 main spans
Daily traffic
16,600
2015 count
Owner
State
State Highway Agency

About this bridge

Interstate 5 over Yreka Creek is a concrete continuous tee beam carrying Interstate 5 over Yreka Creek in Siskiyou County, California. It was built in 1970, so it is 55 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 6 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 16,600 vehicles a day, roughly 25% of them trucks, projected to reach 23,951 by 2042. The structure is 88 ft (26.8 m) long and 116 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

CarriesInterstate 5
CrossesYreka Creek
Location02-SIS-005-R46.79-YRE
RouteInterstate 5
Coordinates41.72001, -122.6376
Functional classUrban Principal Arterial - Interstate

Condition and inspection

Fair

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

ComponentRatingMeaning
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection8 Very GoodNo problems noted.
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 geometry9: Superior to present desirable criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating36.4 US tons
Inventory rating26.8 US tons

Structure

Structure typeTee Beam
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans2
Design loadHS 20
Structure length88 ft (26.8 m)
Longest span44 ft (13.3 m)
Deck width116 ft (35.4 m)
Roadway width114 ft (34.7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic16,600 (2015)
Projected traffic23,951 by 2042
Trucks25%
Lanes on structure4
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.9 mi (3 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 Interstate 5 over Yreka Creek built?

It was built in 1970, making it 55 years old in 2025.

What condition is Interstate 5 over Yreka Creek 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 Interstate 5 over Yreka Creek carry?

About 16,600 vehicles per day (2015 count), of which roughly 25% are trucks.

How long is Interstate 5 over Yreka Creek?

The structure is 88 ft (26.8 m) long with a longest span of 44 ft (13.3 m) and a deck 116 ft wide.

Who owns Interstate 5 over Yreka Creek?

It is owned by the State Highway Agency.