US Bridges

Road 43 over Drain a

Fair

Glenn County, California · 0.2 MI E Road Tt · Structure no. 11C0228

Built
1947
78 years old, rebuilt 1966
Condition
Fair
inspected February 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
30 ft
1 main span
Daily traffic
6
2011 count
Owner
County
County Highway Agency

About this bridge

Road 43 over Drain a is a steel stringer/multi-beam or girder carrying Road 43 over Drain a in Glenn County, California. It was built in 1947 and reconstructed in 1966, so it is 78 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 6 vehicles a day, roughly 2% of them trucks, projected to reach 11 by 2042. The structure is 30 ft (9.1 m) long and 15 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

CarriesRoad 43
CrossesDrain a
Location0.2 MI E Road Tt
RouteCounty Highway 0
Coordinates39.56539, -122.07768
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.
Substructure7 GoodSome minor problems.
Channel and channel protection7 GoodSome minor problems.
Last inspectionFebruary 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourUnknown foundation; not evaluated for scour
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry7: Better than present minimum criteria
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating110 US tons
Inventory rating67.1 US tons

Structure

MaterialSteel
DeckConcrete, cast-in-place
Main spans1
Design loadUnknown
Structure length30 ft (9.1 m)
Longest span28 ft (8.5 m)
Deck width15 ft (4.7 m)
Roadway width15 ft (4.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic6 (2011)
Projected traffic11 by 2042
Trucks2%
Lanes on structure1
Traffic directionOne-lane bridge for two-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.9 mi (3 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 43 over Drain a built?

It was built in 1947, making it 78 years old in 2025. It was reconstructed in 1966.

What condition is Road 43 over Drain a 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 43 over Drain a carry?

About 6 vehicles per day (2011 count), of which roughly 2% are trucks.

How long is Road 43 over Drain a?

The structure is 30 ft (9.1 m) long with a longest span of 28 ft (8.5 m) and a deck 15 ft wide.

Who owns Road 43 over Drain a?

It is owned by the County Highway Agency.