US Bridges

State Route 299 over W Br Cloverswale Creek

Fair

Modoc County, California · 02-MOD-299-27.35 · Structure no. 03 0029

Built
1920
105 years old, rebuilt 1947
Condition
Fair
inspected August 2023
Type
Culvert
Concrete Continuous
Length
24 ft
3 main spans
Daily traffic
2,200
2015 count
Owner
State
State Highway Agency

About this bridge

State Route 299 over W Br Cloverswale Creek is a concrete continuous culvert carrying State Route 299 over W Br Cloverswale Creek in Modoc County, California. It was built in 1920 and reconstructed in 1947, so it is 105 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 2,200 vehicles a day, roughly 36% of them trucks, projected to reach 2,491 by 2040. The structure is 24 ft (7.3 m) long. If it were closed, the detour would be 9.9 mi (16 km).

Location

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CarriesState Route 299
CrossesW Br Cloverswale Creek
Location02-MOD-299-27.35
RouteState Highway 299
CountyModoc County
StateCalifornia
Coordinates41.45951, -120.77881
Functional classRural Principal Arterial - Other

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Culvert6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionAugust 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation4: 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 rating28.5 US tons
Inventory rating17.9 US tons

Structure

Structure typeCulvert
MaterialConcrete Continuous
DeckNot applicable
Main spans3
Design loadUnknown
Structure length24 ft (7.3 m)
Longest span7 ft (2.1 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic2,200 (2015)
Projected traffic2,491 by 2040
Trucks36%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed9.9 mi (16 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 299 over W Br Cloverswale Creek built?

It was built in 1920, making it 105 years old in 2025. It was reconstructed in 1947.

What condition is State Route 299 over W Br Cloverswale Creek 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 August 2023.

How much traffic does State Route 299 over W Br Cloverswale Creek carry?

About 2,200 vehicles per day (2015 count), of which roughly 36% are trucks.

How long is State Route 299 over W Br Cloverswale Creek?

The structure is 24 ft (7.3 m) long with a longest span of 7 ft (2.1 m).

Who owns State Route 299 over W Br Cloverswale Creek?

It is owned by the State Highway Agency.