US Bridges

Humbug Road over Butte Creek

Good

Butte County, California · 6 MI NE Skyway · Structure no. 12C0077

Built
1977
48 years old
Condition
Good
inspected July 2022
Type
Stringer/Multi-beam or Girder
Concrete
Length
35 ft
1 main span
Daily traffic
30
2020 count
Owner
County
County Highway Agency

About this bridge

Humbug Road over Butte Creek is a concrete stringer/multi-beam or girder carrying Humbug Road over Butte Creek in Butte County, California. It was built in 1977, so it is 48 years old, younger 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 30 vehicles a day, roughly 1% of them trucks, projected to reach 107 by 2041. The structure is 35 ft (10.7 m) long and 29 ft wide. If it were closed, the detour would be 24.9 mi (40 km).

CarriesHumbug Road
CrossesButte Creek
Location6 MI NE Skyway
RouteCounty Highway 0
Coordinates40.08774, -121.41737
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
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionJuly 2022
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Deck geometry7: Better than present minimum criteria
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating48.2 US tons
Inventory rating37.1 US tons

Structure

MaterialConcrete
DeckConcrete, precast panels
Main spans1
Design loadHS 20
Structure length35 ft (10.7 m)
Longest span34 ft (10.4 m)
Deck width29 ft (8.8 m)
Roadway width29 ft (8.7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic30 (2020)
Projected traffic107 by 2041
Trucks1%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed24.9 mi (40 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 Humbug Road over Butte Creek built?

It was built in 1977, making it 48 years old in 2025.

What condition is Humbug Road over Butte 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 2022.

How much traffic does Humbug Road over Butte Creek carry?

About 30 vehicles per day (2020 count), of which roughly 1% are trucks.

How long is Humbug Road over Butte Creek?

The structure is 35 ft (10.7 m) long with a longest span of 34 ft (10.4 m) and a deck 29 ft wide.

Who owns Humbug Road over Butte Creek?

It is owned by the County Highway Agency.