US Bridges

County RD D over N Fk Willow Creek

Good

Glenn County, California · 3.6 MI N of S.H. 162 · Structure no. 11C0041

Built
1966
59 years old
Condition
Good
inspected February 2025
Type
Culvert
Concrete Continuous
Length
38 ft
3 main spans
Daily traffic
491
2011 count
Owner
County
County Highway Agency

About this bridge

County RD D over N Fk Willow Creek is a concrete continuous culvert carrying County RD D over N Fk 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 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 491 vehicles a day, roughly 10% of them trucks, projected to reach 675 by 2047. The structure is 38 ft (11.6 m) long and 32 ft wide. If it were closed, the detour would be 18 mi (29 km).

CarriesCounty RD D
CrossesN Fk Willow Creek
Location3.6 MI N of S.H. 162
RouteCounty Highway 0
Coordinates39.57375, -122.24951
Functional classRural Major Collector

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Channel and channel protection7 GoodSome minor problems.
Culvert7 GoodSome minor problems.
Last inspectionFebruary 2025
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 rating44.6 US tons
Inventory rating26.8 US tons

Structure

Structure typeCulvert
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadUnknown
Structure length38 ft (11.6 m)
Longest span12 ft (3.7 m)
Deck width32 ft (9.8 m)
Roadway width31 ft (9.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic491 (2011)
Projected traffic675 by 2047
Trucks10%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed18 mi (29 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 County RD D over N Fk Willow Creek built?

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

What condition is County RD D over N Fk Willow Creek 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 February 2025.

How much traffic does County RD D over N Fk Willow Creek carry?

About 491 vehicles per day (2011 count), of which roughly 10% are trucks.

How long is County RD D over N Fk Willow Creek?

The structure is 38 ft (11.6 m) long with a longest span of 12 ft (3.7 m) and a deck 32 ft wide.

Who owns County RD D over N Fk Willow Creek?

It is owned by the County Highway Agency.