US Bridges

Soda Bay RD over Kelsey Creek

Fair

Lake County, California · 4.9 MI E/O SR 29 · Structure no. 14C0008

Built
1961
64 years old
Condition
Fair
inspected March 2024
Type
Tee Beam
Concrete Continuous
Length
174 ft
3 main spans
Daily traffic
2,108
2009 count
Owner
County
County Highway Agency

About this bridge

Soda Bay RD over Kelsey Creek is a concrete continuous tee beam carrying Soda Bay RD over Kelsey Creek in Lake County, California. It was built in 1961, so it is 64 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 5 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 2,108 vehicles a day, roughly 5% of them trucks, projected to reach 3,272 by 2046. The structure is 174 ft (52.9 m) long and 32 ft wide. If it were closed, the detour would be 6.2 mi (10 km).

Location

Open in Google Maps
CarriesSoda Bay RD
CrossesKelsey Creek
Location4.9 MI E/O SR 29
RouteCounty Highway 0
CountyLake County
StateCalifornia
Coordinates39.01086, -122.83579
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
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure7 GoodSome minor problems.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionMarch 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourScour critical; foundations unstable for calculated scour conditions
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 adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating30.3 US tons
Inventory rating23.6 US tons

Structure

Structure typeTee Beam
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length174 ft (52.9 m)
Longest span68 ft (20.7 m)
Deck width32 ft (9.9 m)
Roadway width31 ft (9.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic2,108 (2009)
Projected traffic3,272 by 2046
Trucks5%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed6.2 mi (10 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 Kelsey Creek built?

It was built in 1961, making it 64 years old in 2025.

What condition is Soda Bay RD over Kelsey 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 March 2024.

How much traffic does Soda Bay RD over Kelsey Creek carry?

About 2,108 vehicles per day (2009 count), of which roughly 5% are trucks.

How long is Soda Bay RD over Kelsey Creek?

The structure is 174 ft (52.9 m) long with a longest span of 68 ft (20.7 m) and a deck 32 ft wide.

Who owns Soda Bay RD over Kelsey Creek?

It is owned by the County Highway Agency.