US Bridges

County Road 6 over Tehama-Colusa Canal

Good

Yolo County, California · 0.9 MI W/O I-5 · Structure no. 22C0166

Built
1978
47 years old
Condition
Good
inspected January 2025
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
75 ft
1 main span
Daily traffic
390
2015 count
Owner
County
County Highway Agency

About this bridge

County Road 6 over Tehama-Colusa Canal is a prestressed concrete stringer/multi-beam or girder carrying County Road 6 over Tehama-Colusa Canal in Yolo County, California. It was built in 1978, so it is 47 years old, younger than the California average of 54.8 years.

The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 390 vehicles a day, roughly 20% of them trucks, projected to reach 636 by 2047. The structure is 75 ft (22.9 m) long and 35 ft wide. If it were closed, the detour would be 5 mi (8 km).

Location

Open in Google Maps
CarriesCounty Road 6
CrossesTehama-Colusa Canal
Location0.9 MI W/O I-5
RouteCounty Highway 0
CountyYolo County
StateCalifornia
Coordinates38.88079, -121.99802
Functional classRural Minor Collector

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure8 Very GoodNo problems noted.
Substructure8 Very GoodNo problems noted.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionJanuary 2025
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation8: Equal to present desirable criteria
Deck geometry7: Better than present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating54.2 US tons
Inventory rating37.8 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20
Structure length75 ft (22.9 m)
Longest span71 ft (21.7 m)
Deck width35 ft (10.6 m)
Roadway width32 ft (9.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic390 (2015)
Projected traffic636 by 2047
Trucks20%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed5 mi (8 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCounty Highway Agency
Maintained byCounty Highway Agency
Historic statusHistorical significance not determinable at this time
Work proposedNone recorded
Estimated improvement cost—
NavigationNot applicable (no waterway)

Frequently asked questions

When was County Road 6 over Tehama-Colusa Canal built?

It was built in 1978, making it 47 years old in 2025.

What condition is County Road 6 over Tehama-Colusa Canal in?

The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in January 2025.

How much traffic does County Road 6 over Tehama-Colusa Canal carry?

About 390 vehicles per day (2015 count), of which roughly 20% are trucks.

How long is County Road 6 over Tehama-Colusa Canal?

The structure is 75 ft (22.9 m) long with a longest span of 71 ft (21.7 m) and a deck 35 ft wide.

Who owns County Road 6 over Tehama-Colusa Canal?

It is owned by the County Highway Agency.