US Bridges

County RD NO.6 over Tehama-Colusa Canal

Fair

Glenn County, California · 0.2 MI E of RD N · Structure no. 11C0248

Built
1965
60 years old
Condition
Fair
inspected January 2025
Type
Slab
Concrete
Length
88 ft
2 main spans
Daily traffic
213
2011 count
Owner
County
County Highway Agency

About this bridge

County RD NO.6 over Tehama-Colusa Canal is a concrete slab carrying County RD NO.6 over Tehama-Colusa Canal in Glenn County, California. It was built in 1965, so it is 60 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 213 vehicles a day, roughly 15% of them trucks, projected to reach 397 by 2043. The structure is 88 ft (26.8 m) long and 36 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

Location

Open in Google Maps
CarriesCounty RD NO.6
CrossesTehama-Colusa Canal
Location0.2 MI E of RD N
RouteCounty Highway 0
CountyGlenn County
StateCalifornia
Coordinates39.78687, -122.15571
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 protection8 Very GoodNo problems noted.
Last inspectionJanuary 2025
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 adequacy9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating45 US tons
Inventory rating27.1 US tons

Structure

Structure typeSlab
MaterialConcrete
DeckConcrete, cast-in-place
Main spans2
Design loadHS 20
Structure length88 ft (26.8 m)
Longest span43 ft (13.1 m)
Deck width36 ft (10.9 m)
Roadway width32 ft (9.7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic213 (2011)
Projected traffic397 by 2043
Trucks15%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.1 mi (5 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 County RD NO.6 over Tehama-Colusa Canal built?

It was built in 1965, making it 60 years old in 2025.

What condition is County RD NO.6 over Tehama-Colusa Canal 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 January 2025.

How much traffic does County RD NO.6 over Tehama-Colusa Canal carry?

About 213 vehicles per day (2011 count), of which roughly 15% are trucks.

How long is County RD NO.6 over Tehama-Colusa Canal?

The structure is 88 ft (26.8 m) long with a longest span of 43 ft (13.1 m) and a deck 36 ft wide.

Who owns County RD NO.6 over Tehama-Colusa Canal?

It is owned by the County Highway Agency.