US Bridges

Cana HWY over Dianes Ditch

Fair

Butte County, California · 4.2 MI W State HWY 99 · Structure no. 12C0297

Built
1921
104 years old
Condition
Fair
inspected July 2024
Type
Tee Beam
Concrete
Length
31 ft
2 main spans
Daily traffic
276
2020 count
Owner
County
County Highway Agency

About this bridge

Cana HWY over Dianes Ditch is a concrete tee beam carrying Cana HWY over Dianes Ditch in Butte County, California. It was built in 1921, so it is 104 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 276 vehicles a day, roughly 21% of them trucks, projected to reach 319 by 2041. The structure is 31 ft (9.6 m) long and 19 ft wide. If it were closed, the detour would be 123.7 mi (199 km).

Location

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CarriesCana HWY
CrossesDianes Ditch
Location4.2 MI W State HWY 99
RouteCounty Highway 0
CountyButte County
StateCalifornia
Coordinates39.84031, -122.01991
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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure8 Very GoodNo problems noted.
Substructure7 GoodSome minor problems.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionJuly 2024
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 geometry3: Basically intolerable, requiring high priority of corrective action
Waterway adequacy4: Meets minimum tolerable limits to be left in place as is
Approach roadway alignment8: Equal to present desirable criteria
Operating rating29.7 US tons
Inventory rating17.9 US tons

Structure

Structure typeTee Beam
MaterialConcrete
DeckConcrete, cast-in-place
Main spans2
Design loadUnknown
Structure length31 ft (9.6 m)
Longest span15 ft (4.7 m)
Deck width19 ft (5.9 m)
Roadway width18 ft (5.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic276 (2020)
Projected traffic319 by 2041
Trucks21%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed123.7 mi (199 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 Cana HWY over Dianes Ditch built?

It was built in 1921, making it 104 years old in 2025.

What condition is Cana HWY over Dianes Ditch 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 July 2024.

How much traffic does Cana HWY over Dianes Ditch carry?

About 276 vehicles per day (2020 count), of which roughly 21% are trucks.

How long is Cana HWY over Dianes Ditch?

The structure is 31 ft (9.6 m) long with a longest span of 15 ft (4.7 m) and a deck 19 ft wide.

Who owns Cana HWY over Dianes Ditch?

It is owned by the County Highway Agency.