US Bridges

Gridley Colusa HWY over Cherokee Canal

Fair

Butte County, California · 1.3 MI E Colusa CO Line · Structure no. 12C0072

Built
1958
67 years old
Condition
Fair
inspected October 2024
Type
Slab
Concrete Continuous
Length
260 ft
8 main spans
Daily traffic
1,139
2018 count
Owner
County
County Highway Agency

About this bridge

Gridley Colusa HWY over Cherokee Canal is a concrete continuous slab carrying Gridley Colusa HWY over Cherokee Canal in Butte County, California. It was built in 1958, so it is 67 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 6 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 1,139 vehicles a day, roughly 18% of them trucks, projected to reach 936 by 2046. The structure is 260 ft (79.2 m) long and 34 ft wide. If it were closed, the detour would be 44.7 mi (72 km).

Location

Open in Google Maps
CarriesGridley Colusa HWY
CrossesCherokee Canal
Location1.3 MI E Colusa CO Line
RouteCounty Highway 0
CountyButte County
StateCalifornia
Coordinates39.36211, -121.86895
Functional classRural Major Collector

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.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionOctober 2024
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation6: Equal to present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating68.6 US tons
Inventory rating41.1 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans8
Design loadHS 20
Structure length260 ft (79.2 m)
Longest span32 ft (9.8 m)
Deck width34 ft (10.4 m)
Roadway width32 ft (9.7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,139 (2018)
Projected traffic936 by 2046
Trucks18%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed44.7 mi (72 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 Gridley Colusa HWY over Cherokee Canal built?

It was built in 1958, making it 67 years old in 2025.

What condition is Gridley Colusa HWY over Cherokee 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 October 2024.

How much traffic does Gridley Colusa HWY over Cherokee Canal carry?

About 1,139 vehicles per day (2018 count), of which roughly 18% are trucks.

How long is Gridley Colusa HWY over Cherokee Canal?

The structure is 260 ft (79.2 m) long with a longest span of 32 ft (9.8 m) and a deck 34 ft wide.

Who owns Gridley Colusa HWY over Cherokee Canal?

It is owned by the County Highway Agency.