US Bridges

Lake ST over Cache Creek

Fair

Lake County, California · 0.03 MI S/O Dam Road · Structure no. 14C0024

Built
1987
38 years old
Condition
Fair
inspected November 2023
Type
Box Beam or Girders - Multiple
Prestressed Concrete
Length
135 ft
1 main span
Daily traffic
1,700
2011 count
Owner
County
County Highway Agency

About this bridge

Lake ST over Cache Creek is a prestressed concrete box beam or girders - multiple carrying Lake ST over Cache Creek in Lake County, California. It was built in 1987, so it is 38 years old, younger 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 1,700 vehicles a day, roughly 2% of them trucks, projected to reach 2,359 by 2043. The structure is 135 ft (41.1 m) long and 44 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

CarriesLake ST
CrossesCache Creek
Location0.03 MI S/O Dam Road
RouteCounty Highway 0
Coordinates38.92531, -122.61162
Functional classUrban 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.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure7 GoodSome minor problems.
Channel and channel protection7 GoodSome minor problems.
Last inspectionNovember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating59.6 US tons
Inventory rating35.7 US tons

Structure

MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20 + Mod
Structure length135 ft (41.1 m)
Longest span133 ft (40.4 m)
Deck width44 ft (13.3 m)
Roadway width36 ft (11 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,700 (2011)
Projected traffic2,359 by 2043
Trucks2%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed3.1 mi (5 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—
NavigationNo navigation control on waterway

Frequently asked questions

When was Lake ST over Cache Creek built?

It was built in 1987, making it 38 years old in 2025.

What condition is Lake ST over Cache 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 November 2023.

How much traffic does Lake ST over Cache Creek carry?

About 1,700 vehicles per day (2011 count), of which roughly 2% are trucks.

How long is Lake ST over Cache Creek?

The structure is 135 ft (41.1 m) long with a longest span of 133 ft (40.4 m) and a deck 44 ft wide.

Who owns Lake ST over Cache Creek?

It is owned by the County Highway Agency.