US Bridges

State Route 162 over Biggs Extension Canal

Fair

Butte County, California · 03-BUT-162-8.11 · Structure no. 12 0040

Built
1910
115 years old, rebuilt 1951
Condition
Fair
inspected April 2023
Type
Slab
Concrete Continuous
Length
48 ft
2 main spans
Daily traffic
930
2021 count
Owner
State
State Highway Agency

About this bridge

State Route 162 over Biggs Extension Canal is a concrete continuous slab carrying State Route 162 over Biggs Extension Canal in Butte County, California. It was built in 1910 and reconstructed in 1951, so it is 115 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 930 vehicles a day, roughly 12% of them trucks, projected to reach 1,587 by 2043. The structure is 48 ft (14.5 m) long and 31 ft wide. If it were closed, the detour would be 8.1 mi (13 km).

Location

Open in Google Maps
CarriesState Route 162
CrossesBiggs Extension Canal
Location03-BUT-162-8.11
RouteState Highway 162
CountyButte County
StateCalifornia
Coordinates39.46496, -121.71862
Functional classRural Minor Arterial

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 inspectionApril 2023
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 adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating68.9 US tons
Inventory rating41.4 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans2
Design loadHS 20
Structure length48 ft (14.5 m)
Longest span24 ft (7.2 m)
Deck width31 ft (9.3 m)
Roadway width26 ft (7.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic930 (2021)
Projected traffic1,587 by 2043
Trucks12%
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

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 162 over Biggs Extension Canal built?

It was built in 1910, making it 115 years old in 2025. It was reconstructed in 1951.

What condition is State Route 162 over Biggs Extension 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 April 2023.

How much traffic does State Route 162 over Biggs Extension Canal carry?

About 930 vehicles per day (2021 count), of which roughly 12% are trucks.

How long is State Route 162 over Biggs Extension Canal?

The structure is 48 ft (14.5 m) long with a longest span of 24 ft (7.2 m) and a deck 31 ft wide.

Who owns State Route 162 over Biggs Extension Canal?

It is owned by the State Highway Agency.