US Bridges

Interstate 5 over South Fork Willow Creek

Fair

Glenn County, California · 03-GLE-005-R12.39 · Structure no. 11 0058R

Built
1966
59 years old
Condition
Fair
inspected May 2024
Type
Slab
Concrete Continuous
Length
210 ft
8 main spans
Daily traffic
12,750
2014 count
Owner
State
State Highway Agency

About this bridge

Interstate 5 over South Fork Willow Creek is a concrete continuous slab carrying Interstate 5 over South Fork Willow Creek in Glenn 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 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 12,750 vehicles a day, projected to reach 20,369 by 2045. The structure is 210 ft (64 m) long and 41 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

CarriesInterstate 5
CrossesSouth Fork Willow Creek
Location03-GLE-005-R12.39
RouteInterstate 5
Coordinates39.56065, -122.2136
Functional classRural 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
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionMay 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating67.9 US tons
Inventory rating40.7 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans8
Design loadHS 20
Structure length210 ft (64 m)
Longest span26 ft (7.9 m)
Deck width41 ft (12.5 m)
Roadway width39 ft (11.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic12,750 (2014)
Projected traffic20,369 by 2045
Trucks0%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.2 mi (2 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 South Fork Willow Creek built?

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

What condition is Interstate 5 over South Fork Willow 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 May 2024.

How much traffic does Interstate 5 over South Fork Willow Creek carry?

About 12,750 vehicles per day (2014 count).

How long is Interstate 5 over South Fork Willow Creek?

The structure is 210 ft (64 m) long with a longest span of 26 ft (7.9 m) and a deck 41 ft wide.

Who owns Interstate 5 over South Fork Willow Creek?

It is owned by the State Highway Agency.