US Bridges

Dunstone Drive over Wilson Creek

Good

Butte County, California · N of LA Porte RD · Structure no. 12C0360

Built
1970
55 years old, rebuilt 2015
Condition
Good
inspected July 2023
Type
Culvert
Steel
Length
30 ft
4 main spans
Daily traffic
3,000
2019 count
Owner
County
County Highway Agency

About this bridge

Dunstone Drive over Wilson Creek is a steel culvert carrying Dunstone Drive over Wilson Creek in Butte County, California. It was built in 1970 and reconstructed in 2015, 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 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 3,000 vehicles a day, roughly 20% of them trucks, projected to reach 4,191 by 2041. The structure is 30 ft (9.1 m) long. If it were closed, the detour would be 14.3 mi (23 km).

Location

Open in Google Maps
CarriesDunstone Drive
CrossesWilson Creek
LocationN of LA Porte RD
RouteCounty Highway 0
CountyButte County
StateCalifornia
Coordinates39.33599, -121.4914
Functional classRural Local

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 protection8 Very GoodNo problems noted.
Culvert7 GoodSome minor problems.
Last inspectionJuly 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating44.6 US tons
Inventory rating26.8 US tons

Structure

Structure typeCulvert
MaterialSteel
DeckNot applicable
Main spans4
Design loadUnknown
Structure length30 ft (9.1 m)
Longest span8 ft (2.4 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic3,000 (2019)
Projected traffic4,191 by 2041
Trucks20%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed14.3 mi (23 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—
NavigationNot applicable (no waterway)

Frequently asked questions

When was Dunstone Drive over Wilson Creek built?

It was built in 1970, making it 55 years old in 2025. It was reconstructed in 2015.

What condition is Dunstone Drive over Wilson 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 July 2023.

How much traffic does Dunstone Drive over Wilson Creek carry?

About 3,000 vehicles per day (2019 count), of which roughly 20% are trucks.

How long is Dunstone Drive over Wilson Creek?

The structure is 30 ft (9.1 m) long with a longest span of 8 ft (2.4 m).

Who owns Dunstone Drive over Wilson Creek?

It is owned by the County Highway Agency.