US Bridges

Rock Springs RD over Secret Ravine

Fair

Placer County, California · N of Port Kenyon RD · Structure no. 19C0108

Built
1930
95 years old, rebuilt 1976
Condition
Fair
inspected May 2024
Type
Stringer/Multi-beam or Girder
Concrete
Length
31 ft
1 main span
Daily traffic
1,725
2007 count
Owner
County
County Highway Agency

About this bridge

Rock Springs RD over Secret Ravine is a concrete stringer/multi-beam or girder carrying Rock Springs RD over Secret Ravine in Placer County, California. It was built in 1930 and reconstructed in 1976, so it is 95 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 1,725 vehicles a day, roughly 3% of them trucks, projected to reach 1,938 by 2042. The structure is 31 ft (9.4 m) long and 30 ft wide. If it were closed, the detour would be 5 mi (8 km).

Location

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CarriesRock Springs RD
CrossesSecret Ravine
LocationN of Port Kenyon RD
RouteCounty Highway 0
CountyPlacer County
StateCalifornia
Coordinates38.84262, -121.15537
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
Deck7 GoodSome minor problems.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionMay 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 adequacy5: Somewhat better than minimum adequacy to tolerate being left in place as is
Approach roadway alignment6: Equal to present minimum criteria
Operating rating28.5 US tons
Inventory rating17.2 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialConcrete
DeckConcrete, cast-in-place
Main spans1
Design loadUnknown
Structure length31 ft (9.4 m)
Longest span29 ft (8.8 m)
Deck width30 ft (9.1 m)
Roadway width30 ft (9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,725 (2007)
Projected traffic1,938 by 2042
Trucks3%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed5 mi (8 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 Rock Springs RD over Secret Ravine built?

It was built in 1930, making it 95 years old in 2025. It was reconstructed in 1976.

What condition is Rock Springs RD over Secret Ravine 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 May 2024.

How much traffic does Rock Springs RD over Secret Ravine carry?

About 1,725 vehicles per day (2007 count), of which roughly 3% are trucks.

How long is Rock Springs RD over Secret Ravine?

The structure is 31 ft (9.4 m) long with a longest span of 29 ft (8.8 m) and a deck 30 ft wide.

Who owns Rock Springs RD over Secret Ravine?

It is owned by the County Highway Agency.