US Bridges

Viola Ave over Viola Slough

Fair

Tehama County, California · 0.6 MI W of I-5 · Structure no. 08C0308

Built
1935
90 years old, rebuilt 2001
Condition
Fair
inspected February 2025
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
35 ft
2 main spans
Daily traffic
80
2007 count
Owner
County
County Highway Agency

About this bridge

Viola Ave over Viola Slough is a steel continuous stringer/multi-beam or girder carrying Viola Ave over Viola Slough in Tehama County, California. It was built in 1935 and reconstructed in 2001, so it is 90 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 80 vehicles a day, projected to reach 133 by 2047. The structure is 35 ft (10.7 m) long and 24 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesViola Ave
CrossesViola Slough
Location0.6 MI W of I-5
RouteCounty Highway 0
CountyTehama County
StateCalifornia
Coordinates39.89943, -122.21275
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.
Substructure7 GoodSome minor problems.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionFebruary 2025
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 geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating69.7 US tons
Inventory rating41.8 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckCorrugated steel
Main spans2
Design loadUnknown
Structure length35 ft (10.7 m)
Longest span17 ft (5.2 m)
Deck width24 ft (7.2 m)
Roadway width23 ft (7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic80 (2007)
Projected traffic133 by 2047
Trucks—
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.2 mi (2 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 Viola Ave over Viola Slough built?

It was built in 1935, making it 90 years old in 2025. It was reconstructed in 2001.

What condition is Viola Ave over Viola 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 February 2025.

How much traffic does Viola Ave over Viola Slough carry?

About 80 vehicles per day (2007 count).

How long is Viola Ave over Viola Slough?

The structure is 35 ft (10.7 m) long with a longest span of 17 ft (5.2 m) and a deck 24 ft wide.

Who owns Viola Ave over Viola Slough?

It is owned by the County Highway Agency.