US Bridges

CO RD #12 over Tehama-Colusa Canal

Fair

Glenn County, California · 0.3 MI East of CO R N · Structure no. 11C0251

Built
1975
50 years old
Condition
Fair
inspected January 2025
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
82 ft
1 main span
Daily traffic
169
2009 count
Owner
County
County Highway Agency

About this bridge

CO RD #12 over Tehama-Colusa Canal is a prestressed concrete stringer/multi-beam or girder carrying CO RD #12 over Tehama-Colusa Canal in Glenn County, California. It was built in 1975, so it is 50 years old, younger 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 169 vehicles a day, roughly 10% of them trucks, projected to reach 218 by 2043. The structure is 82 ft (25 m) long and 35 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

Open in Google Maps
CarriesCO RD #12
CrossesTehama-Colusa Canal
Location0.3 MI East of CO R N
RouteCounty Highway 0
CountyGlenn County
StateCalifornia
Coordinates39.75414, -122.15466
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 protection9 ExcellentNo 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 geometry7: Better than present minimum criteria
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating49.6 US tons
Inventory rating33.2 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20
Structure length82 ft (25 m)
Longest span79 ft (24.1 m)
Deck width35 ft (10.6 m)
Roadway width32 ft (9.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic169 (2009)
Projected traffic218 by 2043
Trucks10%
Lanes on structure2
Traffic directionTwo-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 statusHistorical significance not determinable at this time
Work proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was CO RD #12 over Tehama-Colusa Canal built?

It was built in 1975, making it 50 years old in 2025.

What condition is CO RD #12 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 CO RD #12 over Tehama-Colusa Canal carry?

About 169 vehicles per day (2009 count), of which roughly 10% are trucks.

How long is CO RD #12 over Tehama-Colusa Canal?

The structure is 82 ft (25 m) long with a longest span of 79 ft (24.1 m) and a deck 35 ft wide.

Who owns CO RD #12 over Tehama-Colusa Canal?

It is owned by the County Highway Agency.