US Bridges

Humbug Road over Butt Creek

Fair

Plumas County, California · 1.2 MI W Humbg-Humblt RD · Structure no. 09C0062

Built
1960
65 years old
Condition
Fair
inspected September 2023
Type
Slab
Concrete Continuous
Length
70 ft
3 main spans
Daily traffic
35
2019 count
Owner
County
County Highway Agency

About this bridge

Humbug Road over Butt Creek is a concrete continuous slab carrying Humbug Road over Butt Creek in Plumas County, California. It was built in 1960, so it is 65 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 35 vehicles a day, projected to reach 68 by 2044. The structure is 70 ft (21.3 m) long and 23 ft wide. If it were closed, the detour would be 19.3 mi (31 km).

Location

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CarriesHumbug Road
CrossesButt Creek
Location1.2 MI W Humbg-Humblt RD
RouteCounty Highway 0
CountyPlumas County
StateCalifornia
Coordinates40.20169, -121.2097
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.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionSeptember 2023
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 geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy5: Somewhat better than minimum adequacy to tolerate being left in place as is
Approach roadway alignment8: Equal to present desirable criteria
Operating rating77.8 US tons
Inventory rating46.7 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 15
Structure length70 ft (21.3 m)
Longest span29 ft (8.8 m)
Deck width23 ft (7.1 m)
Roadway width22 ft (6.7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic35 (2019)
Projected traffic68 by 2044
Trucks—
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed19.3 mi (31 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 Humbug Road over Butt Creek built?

It was built in 1960, making it 65 years old in 2025.

What condition is Humbug Road over Butt 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 September 2023.

How much traffic does Humbug Road over Butt Creek carry?

About 35 vehicles per day (2019 count).

How long is Humbug Road over Butt Creek?

The structure is 70 ft (21.3 m) long with a longest span of 29 ft (8.8 m) and a deck 23 ft wide.

Who owns Humbug Road over Butt Creek?

It is owned by the County Highway Agency.