US Bridges

Larkin RD over Sutter-Butte Canal

Fair

Butte County, California · 1.5 MI N Orvle-Gridly RD · Structure no. 12C0166

Built
1970
55 years old
Condition
Fair
inspected February 2025
Type
Slab
Concrete Continuous
Length
67 ft
3 main spans
Daily traffic
1,200
2019 count
Owner
County
County Highway Agency

About this bridge

Larkin RD over Sutter-Butte Canal is a concrete continuous slab carrying Larkin RD over Sutter-Butte Canal in Butte County, California. It was built in 1970, so it is 55 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 1,200 vehicles a day, roughly 14% of them trucks, projected to reach 2,180 by 2043. The structure is 67 ft (20.4 m) long and 32 ft wide. If it were closed, the detour would be 8.1 mi (13 km).

Location

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CarriesLarkin RD
CrossesSutter-Butte Canal
Location1.5 MI N Orvle-Gridly RD
RouteCounty Highway 0
CountyButte County
StateCalifornia
Coordinates39.38449, -121.65417
Functional classRural Minor 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
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection7 GoodSome minor problems.
Last inspectionFebruary 2025
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
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 rating59 US tons
Inventory rating35.7 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length67 ft (20.4 m)
Longest span26 ft (7.9 m)
Deck width32 ft (9.9 m)
Roadway width32 ft (9.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,200 (2019)
Projected traffic2,180 by 2043
Trucks14%
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—
NavigationNo navigation control on waterway

Frequently asked questions

When was Larkin RD over Sutter-Butte Canal built?

It was built in 1970, making it 55 years old in 2025.

What condition is Larkin RD over Sutter-Butte 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 February 2025.

How much traffic does Larkin RD over Sutter-Butte Canal carry?

About 1,200 vehicles per day (2019 count), of which roughly 14% are trucks.

How long is Larkin RD over Sutter-Butte Canal?

The structure is 67 ft (20.4 m) long with a longest span of 26 ft (7.9 m) and a deck 32 ft wide.

Who owns Larkin RD over Sutter-Butte Canal?

It is owned by the County Highway Agency.