US Bridges

Soda Bay RD over Adobe Creek

Fair

Lake County, California · 2.7 MI E of SR 29 · Structure no. 14C0002

Built
1957
68 years old
Condition
Fair
inspected February 2024
Type
Tee Beam
Concrete
Length
52 ft
1 main span
Daily traffic
2,060
2009 count
Owner
County
County Highway Agency

About this bridge

Soda Bay RD over Adobe Creek is a concrete tee beam carrying Soda Bay RD over Adobe Creek in Lake County, California. It was built in 1957, so it is 68 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 2,060 vehicles a day, roughly 5% of them trucks, projected to reach 3,272 by 2046. The structure is 52 ft (15.8 m) long and 32 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

Location

Open in Google Maps
CarriesSoda Bay RD
CrossesAdobe Creek
Location2.7 MI E of SR 29
RouteCounty Highway 0
CountyLake County
StateCalifornia
Coordinates39.01487, -122.87076
Functional classRural Major Collector

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.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionFebruary 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation6: Equal to present minimum criteria
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating33.2 US tons
Inventory rating25.7 US tons

Structure

Structure typeTee Beam
MaterialConcrete
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20
Structure length52 ft (15.8 m)
Longest span51 ft (15.5 m)
Deck width32 ft (9.9 m)
Roadway width32 ft (9.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic2,060 (2009)
Projected traffic3,272 by 2046
Trucks5%
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 Soda Bay RD over Adobe Creek built?

It was built in 1957, making it 68 years old in 2025.

What condition is Soda Bay RD over Adobe 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 Soda Bay RD over Adobe Creek carry?

About 2,060 vehicles per day (2009 count), of which roughly 5% are trucks.

How long is Soda Bay RD over Adobe Creek?

The structure is 52 ft (15.8 m) long with a longest span of 51 ft (15.5 m) and a deck 32 ft wide.

Who owns Soda Bay RD over Adobe Creek?

It is owned by the County Highway Agency.