US Bridges

Witter Springs RD over Cooper Creek

Fair

Lake County, California · 0.6 MI N of SR 20 · Structure no. 14C0090

Built
1935
90 years old, rebuilt 1965
Condition
Fair
inspected February 2024
Type
Tee Beam
Concrete
Length
38 ft
1 main span
Daily traffic
212
2009 count
Owner
County
County Highway Agency

About this bridge

Witter Springs RD over Cooper Creek is a concrete tee beam carrying Witter Springs RD over Cooper Creek in Lake County, California. It was built in 1935 and reconstructed in 1965, so it is 90 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 212 vehicles a day, roughly 2% of them trucks, projected to reach 326 by 2046. The structure is 38 ft (11.6 m) long and 28 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

Location

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CarriesWitter Springs RD
CrossesCooper Creek
Location0.6 MI N of SR 20
RouteCounty Highway 0
CountyLake County
StateCalifornia
Coordinates39.17243, -122.96324
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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure8 Very GoodNo problems noted.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionFebruary 2024
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
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment5: Somewhat better than minimum adequacy to tolerate being left in place as is
Operating rating28.2 US tons
Inventory rating16.8 US tons

Structure

Structure typeTee Beam
MaterialConcrete
DeckConcrete, cast-in-place
Main spans1
Design loadUnknown
Structure length38 ft (11.6 m)
Longest span36 ft (11 m)
Deck width28 ft (8.6 m)
Roadway width26 ft (8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic212 (2009)
Projected traffic326 by 2046
Trucks2%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.7 mi (6 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—
NavigationNot applicable (no waterway)

Frequently asked questions

When was Witter Springs RD over Cooper Creek built?

It was built in 1935, making it 90 years old in 2025. It was reconstructed in 1965.

What condition is Witter Springs RD over Cooper 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 February 2024.

How much traffic does Witter Springs RD over Cooper Creek carry?

About 212 vehicles per day (2009 count), of which roughly 2% are trucks.

How long is Witter Springs RD over Cooper Creek?

The structure is 38 ft (11.6 m) long with a longest span of 36 ft (11 m) and a deck 28 ft wide.

Who owns Witter Springs RD over Cooper Creek?

It is owned by the County Highway Agency.