US Bridges

Afton RD over Schohr Drain

Fair

Butte County, California · 0.3 MI E Colusa Co. Line · Structure no. 12C0071

Built
1957
68 years old
Condition
Fair
inspected October 2024
Type
Box Beam or Girders - Multiple
Concrete
Length
32 ft
1 main span
Daily traffic
60
2018 count
Owner
County
County Highway Agency

About this bridge

Afton RD over Schohr Drain is a concrete box beam or girders - multiple carrying Afton RD over Schohr Drain in Butte County, California. It was built in 1957, so it is 68 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 60 vehicles a day, roughly 20% of them trucks, projected to reach 160 by 2044. The structure is 32 ft (9.8 m) long and 32 ft wide. If it were closed, the detour would be 14.9 mi (24 km).

CarriesAfton RD
CrossesSchohr Drain
Location0.3 MI E Colusa Co. Line
RouteCounty Highway 0
Coordinates39.42026, -121.87665
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
Deck7 GoodSome minor problems.
Superstructure8 Very GoodNo problems noted.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection7 GoodSome minor problems.
Last inspectionOctober 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry7: Better than present minimum criteria
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating76.9 US tons
Inventory rating35.9 US tons

Structure

MaterialConcrete
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20
Structure length32 ft (9.8 m)
Longest span30 ft (9.1 m)
Deck width32 ft (9.8 m)
Roadway width32 ft (9.7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic60 (2018)
Projected traffic160 by 2044
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 Afton RD over Schohr Drain built?

It was built in 1957, making it 68 years old in 2025.

What condition is Afton RD over Schohr Drain 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 October 2024.

How much traffic does Afton RD over Schohr Drain carry?

About 60 vehicles per day (2018 count), of which roughly 20% are trucks.

How long is Afton RD over Schohr Drain?

The structure is 32 ft (9.8 m) long with a longest span of 30 ft (9.1 m) and a deck 32 ft wide.

Who owns Afton RD over Schohr Drain?

It is owned by the County Highway Agency.