US Bridges

Lassen Road over Singer Creek Fork

Fair

Tehama County, California · 2.2 MI E of SH 99 · Structure no. 08C0212

Built
1981
44 years old
Condition
Fair
inspected November 2024
Type
Girder and Floorbeam System
Steel Continuous
Length
38 ft
2 main spans
Daily traffic
80
2010 count
Owner
County
County Highway Agency

About this bridge

Lassen Road over Singer Creek Fork is a steel continuous girder and floorbeam system carrying Lassen Road over Singer Creek Fork in Tehama County, California. It was built in 1981, so it is 44 years old, younger 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 80 vehicles a day, projected to reach 104 by 2042. The structure is 38 ft (11.6 m) long and 19 ft wide. If it were closed, the detour would be 13 mi (21 km).

Location

Open in Google Maps
CarriesLassen Road
CrossesSinger Creek Fork
Location2.2 MI E of SH 99
RouteCounty Highway 0
CountyTehama County
StateCalifornia
Coordinates39.91401, -121.97052
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
Deck7 GoodSome minor problems.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection7 GoodSome minor problems.
Last inspectionNovember 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourUnknown foundation; not evaluated for scour
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating33.2 US tons
Inventory rating20 US tons

Structure

Structure typeGirder and Floorbeam System
MaterialSteel Continuous
DeckClosed grating
Main spans2
Design loadUnknown
Structure length38 ft (11.6 m)
Longest span17 ft (5.2 m)
Deck width19 ft (5.9 m)
Roadway width19 ft (5.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic80 (2010)
Projected traffic104 by 2042
Trucks—
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed13 mi (21 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 Lassen Road over Singer Creek Fork built?

It was built in 1981, making it 44 years old in 2025.

What condition is Lassen Road over Singer Creek Fork 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 November 2024.

How much traffic does Lassen Road over Singer Creek Fork carry?

About 80 vehicles per day (2010 count).

How long is Lassen Road over Singer Creek Fork?

The structure is 38 ft (11.6 m) long with a longest span of 17 ft (5.2 m) and a deck 19 ft wide.

Who owns Lassen Road over Singer Creek Fork?

It is owned by the County Highway Agency.