US Bridges

Old White Rock RD over Carson Creek

Fair

El Dorado County, California · 1.1 MI E of Latrobe RD · Structure no. 25C0112

Built
1918
107 years old
Condition
Fair
inspected June 2024
Type
Slab
Concrete Continuous
Length
52 ft
3 main spans
Daily traffic
100
2011 count
Owner
County
County Highway Agency

About this bridge

Old White Rock RD over Carson Creek is a concrete continuous slab carrying Old White Rock RD over Carson Creek in El Dorado County, California. It was built in 1918, so it is 107 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 100 vehicles a day, roughly 10% of them trucks, projected to reach 325 by 2046. The structure is 52 ft (15.8 m) long and 24 ft wide. If it were closed, the detour would be 123.7 mi (199 km).

CarriesOld White Rock RD
CrossesCarson Creek
Location1.1 MI E of Latrobe RD
RouteCounty Highway 0
Coordinates38.65494, -121.05269
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
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure7 GoodSome minor problems.
Channel and channel protection7 GoodSome minor problems.
Last inspectionJune 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating29.7 US tons
Inventory rating17.9 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadUnknown
Structure length52 ft (15.8 m)
Longest span17 ft (5.2 m)
Deck width24 ft (7.2 m)
Roadway width21 ft (6.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic100 (2011)
Projected traffic325 by 2046
Trucks10%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed123.7 mi (199 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 Old White Rock RD over Carson Creek built?

It was built in 1918, making it 107 years old in 2025.

What condition is Old White Rock RD over Carson 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 June 2024.

How much traffic does Old White Rock RD over Carson Creek carry?

About 100 vehicles per day (2011 count), of which roughly 10% are trucks.

How long is Old White Rock RD over Carson Creek?

The structure is 52 ft (15.8 m) long with a longest span of 17 ft (5.2 m) and a deck 24 ft wide.

Who owns Old White Rock RD over Carson Creek?

It is owned by the County Highway Agency.