US Bridges

Tyler RD over Tehama-Colusa Canal

Good

Tehama County, California · 3.5 MI E Highway 99W · Structure no. 08C0231

Built
1969
56 years old
Condition
Good
inspected February 2024
Type
Slab
Concrete
Length
79 ft
2 main spans
Daily traffic
300
2006 count
Owner
County
County Highway Agency

About this bridge

Tyler RD over Tehama-Colusa Canal is a concrete slab carrying Tyler RD over Tehama-Colusa Canal in Tehama County, California. It was built in 1969, so it is 56 years old, older 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 300 vehicles a day, roughly 2% of them trucks, projected to reach 483 by 2042. The structure is 79 ft (24.1 m) long and 34 ft wide. If it were closed, the detour would be 8.1 mi (13 km).

CarriesTyler RD
CrossesTehama-Colusa Canal
Location3.5 MI E Highway 99W
RouteCounty Highway 0
Coordinates40.11085, -122.16331
Functional classRural Major 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.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionFebruary 2024
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating59.6 US tons
Inventory rating35.7 US tons

Structure

Structure typeSlab
MaterialConcrete
DeckConcrete, cast-in-place
Main spans2
Design loadUnknown
Structure length79 ft (24.1 m)
Longest span37 ft (11.3 m)
Deck width34 ft (10.4 m)
Roadway width30 ft (9.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic300 (2006)
Projected traffic483 by 2042
Trucks2%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed8.1 mi (13 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—
NavigationNot applicable (no waterway)

Frequently asked questions

When was Tyler RD over Tehama-Colusa Canal built?

It was built in 1969, making it 56 years old in 2025.

What condition is Tyler RD 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 February 2024.

How much traffic does Tyler RD over Tehama-Colusa Canal carry?

About 300 vehicles per day (2006 count), of which roughly 2% are trucks.

How long is Tyler RD over Tehama-Colusa Canal?

The structure is 79 ft (24.1 m) long with a longest span of 37 ft (11.3 m) and a deck 34 ft wide.

Who owns Tyler RD over Tehama-Colusa Canal?

It is owned by the County Highway Agency.