US Bridges

Road Y over Afton Drain

Fair

Glenn County, California · 1.1 MI N Road 69 · Structure no. 11C0079

Built
1940
85 years old
Condition
Fair
inspected February 2024
Type
Girder and Floorbeam System
Concrete Continuous
Length
44 ft
2 main spans
Daily traffic
207
2011 count
Owner
County
County Highway Agency

About this bridge

Road Y over Afton Drain is a concrete continuous girder and floorbeam system carrying Road Y over Afton Drain in Glenn County, California. It was built in 1940, so it is 85 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 207 vehicles a day, roughly 25% of them trucks, projected to reach 284 by 2042. The structure is 44 ft (13.4 m) long and 22 ft wide. If it were closed, the detour would be 8.1 mi (13 km).

Location

Open in Google Maps
CarriesRoad Y
CrossesAfton Drain
Location1.1 MI N Road 69
RouteCounty Highway 0
CountyGlenn County
StateCalifornia
Coordinates39.41889, -121.96659
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
Deck7 GoodSome minor problems.
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 protection7 GoodSome minor problems.
Last inspectionFebruary 2024
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 geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy4: Meets minimum tolerable limits to be left in place as is
Approach roadway alignment6: Equal to present minimum criteria
Operating rating31.1 US tons
Inventory rating18.5 US tons

Structure

Structure typeGirder and Floorbeam System
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans2
Design loadUnknown
Structure length44 ft (13.4 m)
Longest span21 ft (6.4 m)
Deck width22 ft (6.6 m)
Roadway width20 ft (6.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic207 (2011)
Projected traffic284 by 2042
Trucks25%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed8.1 mi (13 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 Road Y over Afton Drain built?

It was built in 1940, making it 85 years old in 2025.

What condition is Road Y over Afton 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 February 2024.

How much traffic does Road Y over Afton Drain carry?

About 207 vehicles per day (2011 count), of which roughly 25% are trucks.

How long is Road Y over Afton Drain?

The structure is 44 ft (13.4 m) long with a longest span of 21 ft (6.4 m) and a deck 22 ft wide.

Who owns Road Y over Afton Drain?

It is owned by the County Highway Agency.