US Bridges

State Route 20 over Polk Jones Cattlepass

Fair

Lake County, California · 01-LAK-020-9.41 · Structure no. 14 0034

Built
1955
70 years old
Condition
Fair
inspected October 2022
Type
Culvert
Concrete Continuous
Length
24 ft
2 main spans
Daily traffic
8,000
2009 count
Owner
State
State Highway Agency

About this bridge

State Route 20 over Polk Jones Cattlepass is a concrete continuous culvert carrying State Route 20 over Polk Jones Cattlepass in Lake County, California. It was built in 1955, so it is 70 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 8,000 vehicles a day, roughly 10% of them trucks, projected to reach 11,984 by 2042. The structure is 24 ft (7.2 m) long and 43 ft wide. If it were closed, the detour would be 8.7 mi (14 km).

Location

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CarriesState Route 20
CrossesPolk Jones Cattlepass
Location01-LAK-020-9.41
RouteState Highway 20
CountyLake County
StateCalifornia
Coordinates39.16136, -122.90115
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
Channel and channel protection8 Very GoodNo problems noted.
Culvert6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionOctober 2022
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating59.6 US tons
Inventory rating35.7 US tons

Structure

Structure typeCulvert
MaterialConcrete Continuous
DeckNot applicable
Main spans2
Design loadUnknown
Structure length24 ft (7.2 m)
Longest span13 ft (4 m)
Deck width43 ft (13.1 m)
Roadway width43 ft (13 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic8,000 (2009)
Projected traffic11,984 by 2042
Trucks10%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed8.7 mi (14 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—
NavigationNot applicable (no waterway)

Frequently asked questions

When was State Route 20 over Polk Jones Cattlepass built?

It was built in 1955, making it 70 years old in 2025.

What condition is State Route 20 over Polk Jones Cattlepass 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 October 2022.

How much traffic does State Route 20 over Polk Jones Cattlepass carry?

About 8,000 vehicles per day (2009 count), of which roughly 10% are trucks.

How long is State Route 20 over Polk Jones Cattlepass?

The structure is 24 ft (7.2 m) long with a longest span of 13 ft (4 m) and a deck 43 ft wide.

Who owns State Route 20 over Polk Jones Cattlepass?

It is owned by the State Highway Agency.