US Bridges

County RD P over Willow Creek

Fair

Glenn County, California · 2.8 MI N of CO RD #60 · Structure no. 11C0212

Built
1970
55 years old
Condition
Fair
inspected January 2025
Type
Slab
Concrete Continuous
Length
137 ft
5 main spans
Daily traffic
249
2011 count
Owner
County
County Highway Agency

About this bridge

County RD P over Willow Creek is a concrete continuous slab carrying County RD P over Willow Creek in Glenn 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 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 249 vehicles a day, roughly 20% of them trucks, projected to reach 375 by 2043. The structure is 137 ft (41.8 m) long and 33 ft wide. If it were closed, the detour would be 14.9 mi (24 km).

Location

Open in Google Maps
CarriesCounty RD P
CrossesWillow Creek
Location2.8 MI N of CO RD #60
RouteCounty Highway 0
CountyGlenn County
StateCalifornia
Coordinates39.50469, -122.13671
Functional classRural Major Collector

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 protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionJanuary 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 adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating65.4 US tons
Inventory rating39.2 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans5
Design loadHS 20
Structure length137 ft (41.8 m)
Longest span30 ft (9.1 m)
Deck width33 ft (10 m)
Roadway width32 ft (9.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic249 (2011)
Projected traffic375 by 2043
Trucks20%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed14.9 mi (24 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 P over Willow Creek built?

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

What condition is County RD P 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 January 2025.

How much traffic does County RD P over Willow Creek carry?

About 249 vehicles per day (2011 count), of which roughly 20% are trucks.

How long is County RD P over Willow Creek?

The structure is 137 ft (41.8 m) long with a longest span of 30 ft (9.1 m) and a deck 33 ft wide.

Who owns County RD P over Willow Creek?

It is owned by the County Highway Agency.