US Bridges

State Route 32 over Kusal Slough

Good

Butte County, California · 03-BUT-032-1.97 · Structure no. 12 0050

Built
1921
104 years old, rebuilt 1960
Condition
Good
inspected May 2024
Type
Tee Beam
Concrete Continuous
Length
242 ft
8 main spans
Daily traffic
11,700
2020 count
Owner
State
State Highway Agency

About this bridge

State Route 32 over Kusal Slough is a concrete continuous tee beam carrying State Route 32 over Kusal Slough in Butte County, California. It was built in 1921 and reconstructed in 1960, 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 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 11,700 vehicles a day, projected to reach 17,555 by 2042. The structure is 242 ft (73.8 m) long and 35 ft wide. If it were closed, the detour would be 8.1 mi (13 km).

CarriesState Route 32
CrossesKusal Slough
Location03-BUT-032-1.97
RouteState Highway 32
Coordinates39.75328, -121.96115
Functional classRural Principal Arterial - Other

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 inspectionMay 2024
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation7: Better than present minimum criteria
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating64.6 US tons
Inventory rating38.9 US tons

Structure

Structure typeTee Beam
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans8
Design loadUnknown
Structure length242 ft (73.8 m)
Longest span30 ft (9.1 m)
Deck width35 ft (10.6 m)
Roadway width32 ft (9.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic11,700 (2020)
Projected traffic17,555 by 2042
Trucks0%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed8.1 mi (13 km)
TollOn a free road
National Highway SystemYes

Ownership and planned work

OwnerState Highway Agency
Maintained byState 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 State Route 32 over Kusal Slough built?

It was built in 1921, making it 104 years old in 2025. It was reconstructed in 1960.

What condition is State Route 32 over Kusal Slough 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 May 2024.

How much traffic does State Route 32 over Kusal Slough carry?

About 11,700 vehicles per day (2020 count).

How long is State Route 32 over Kusal Slough?

The structure is 242 ft (73.8 m) long with a longest span of 30 ft (9.1 m) and a deck 35 ft wide.

Who owns State Route 32 over Kusal Slough?

It is owned by the State Highway Agency.