US Bridges

Road Bb over Willow Creek

Fair

Glenn County, California · 0.2 MI S/O SH 162 · Structure no. 11C0053

Built
1965
60 years old
Condition
Fair
inspected February 2025
Type
Slab
Concrete Continuous
Length
78 ft
3 main spans
Daily traffic
108
2011 count
Owner
County
County Highway Agency

About this bridge

Road Bb over Willow Creek is a concrete continuous slab carrying Road Bb over Willow Creek in Glenn County, California. It was built in 1965, so it is 60 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 108 vehicles a day, roughly 10% of them trucks, projected to reach 108 by 2047. The structure is 78 ft (23.8 m) long and 32 ft wide. If it were closed, the detour would be 11.8 mi (19 km).

Location

Open in Google Maps
CarriesRoad Bb
CrossesWillow Creek
Location0.2 MI S/O SH 162
RouteCounty Highway 0
CountyGlenn County
StateCalifornia
Coordinates39.52071, -122.27735
Functional classRural Local

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.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure7 GoodSome minor problems.
Channel and channel protection7 GoodSome minor problems.
Last inspectionFebruary 2025
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 geometry7: Better than present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating93.6 US tons
Inventory rating56.1 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length78 ft (23.8 m)
Longest span30 ft (9.1 m)
Deck width32 ft (9.9 m)
Roadway width32 ft (9.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic108 (2011)
Projected traffic108 by 2047
Trucks10%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed11.8 mi (19 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCounty Highway Agency
Maintained byCounty 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 Road Bb over Willow Creek built?

It was built in 1965, making it 60 years old in 2025.

What condition is Road Bb over 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 February 2025.

How much traffic does Road Bb over Willow Creek carry?

About 108 vehicles per day (2011 count), of which roughly 10% are trucks.

How long is Road Bb over Willow Creek?

The structure is 78 ft (23.8 m) long with a longest span of 30 ft (9.1 m) and a deck 32 ft wide.

Who owns Road Bb over Willow Creek?

It is owned by the County Highway Agency.