US Bridges

Day Avenue over Unnamed Slough

Fair

Tehama County, California · 0.2 MI N of 68th Ave · Structure no. 08C0253

Built
1968
57 years old
Condition
Fair
inspected April 2024
Type
Slab
Concrete
Length
32 ft
2 main spans
Daily traffic
82
2010 count
Owner
County
County Highway Agency

About this bridge

Day Avenue over Unnamed Slough is a concrete slab carrying Day Avenue over Unnamed Slough in Tehama County, California. It was built in 1968, so it is 57 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 82 vehicles a day, roughly 2% of them trucks, projected to reach 312 by 2046. The structure is 32 ft (9.8 m) long and 28 ft wide. If it were closed, the detour would be 123.7 mi (199 km).

Location

Open in Google Maps
CarriesDay Avenue
CrossesUnnamed Slough
Location0.2 MI N of 68th Ave
RouteCounty Highway 0
CountyTehama County
StateCalifornia
Coordinates40.1155, -122.09337
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.
Superstructure7 GoodSome minor problems.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionApril 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 geometry6: Equal to present minimum criteria
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating44.6 US tons
Inventory rating26.8 US tons

Structure

Structure typeSlab
MaterialConcrete
DeckConcrete, cast-in-place
Main spans2
Design loadUnknown
Structure length32 ft (9.8 m)
Longest span15 ft (4.6 m)
Deck width28 ft (8.5 m)
Roadway width27 ft (8.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic82 (2010)
Projected traffic312 by 2046
Trucks2%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed123.7 mi (199 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 Day Avenue over Unnamed Slough built?

It was built in 1968, making it 57 years old in 2025.

What condition is Day Avenue over Unnamed Slough 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 April 2024.

How much traffic does Day Avenue over Unnamed Slough carry?

About 82 vehicles per day (2010 count), of which roughly 2% are trucks.

How long is Day Avenue over Unnamed Slough?

The structure is 32 ft (9.8 m) long with a longest span of 15 ft (4.6 m) and a deck 28 ft wide.

Who owns Day Avenue over Unnamed Slough?

It is owned by the County Highway Agency.