US Bridges

Afton Road over Butte Creek

Poor

Butte County, California · At Glenn CO Line · Structure no. 12C0384

Built
1914
111 years old
Condition
Poor
inspected October 2024
Type
Tee Beam
Concrete Continuous
Length
120 ft
6 main spans
Daily traffic
122
2019 count
Owner
County
County Highway Agency

About this bridge

Afton Road over Butte Creek is a concrete continuous tee beam carrying Afton Road over Butte Creek in Butte County, California. It was built in 1914, so it is 111 years old, older than the California average of 54.8 years.

The most recent inspection reported to the Federal Highway Administration rates it in poor condition with a lowest component rating of 2 out of 9. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.

It carries about 122 vehicles a day, roughly 20% of them trucks, projected to reach 147 by 2041. The structure is 120 ft (36.6 m) long and 21 ft wide. If it were closed, the detour would be 14.9 mi (24 km).

CarriesAfton Road
CrossesButte Creek
LocationAt Glenn CO Line
RouteCounty Highway 0
Coordinates39.41988, -121.88151
Functional classRural Minor Collector

Condition and inspection

Poor

The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.

ComponentRatingMeaning
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure7 GoodSome minor problems.
Substructure2 CriticalAdvanced deterioration of primary structural elements. Bridge may be closed until corrective action is taken.
Channel and channel protection2 CriticalAdvanced deterioration of primary structural elements. Bridge may be closed until corrective action is taken.
Last inspectionOctober 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourScour critical; extensive scour has occurred
Structural evaluation2: Basically intolerable, requiring high priority of replacement
Deck geometry3: Basically intolerable, requiring high priority of corrective action
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating45.7 US tons
Inventory rating27.4 US tons

Structure

Structure typeTee Beam
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans6
Design loadUnknown
Structure length120 ft (36.6 m)
Longest span20 ft (6.1 m)
Deck width21 ft (6.3 m)
Roadway width19 ft (5.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic122 (2019)
Projected traffic147 by 2041
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 proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$904,000 (2017 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Afton Road over Butte Creek built?

It was built in 1914, making it 111 years old in 2025.

What condition is Afton Road over Butte Creek in?

The National Bridge Inventory rates it in poor condition. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. The last reported inspection was in October 2024.

How much traffic does Afton Road over Butte Creek carry?

About 122 vehicles per day (2019 count), of which roughly 20% are trucks.

How long is Afton Road over Butte Creek?

The structure is 120 ft (36.6 m) long with a longest span of 20 ft (6.1 m) and a deck 21 ft wide.

Who owns Afton Road over Butte Creek?

It is owned by the County Highway Agency.