US Bridges

Rock CR RD over Rock Creek

Fair

Shasta County, California · 0.4 MI N of S.R. 299 · Structure no. 06C0301

Built
1960
65 years old
Condition
Fair
inspected August 2024
Type
Slab
Concrete
Length
27 ft
1 main span
Daily traffic
1,144
2012 count
Owner
County
County Highway Agency

About this bridge

Rock CR RD over Rock Creek is a concrete slab carrying Rock CR RD over Rock Creek in Shasta County, California. It was built in 1960, so it is 65 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 1,144 vehicles a day, roughly 5% of them trucks, projected to reach 3,071 by 2044. The structure is 27 ft (8.2 m) long and 25 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

Location

Open in Google Maps
CarriesRock CR RD
CrossesRock Creek
Location0.4 MI N of S.R. 299
RouteCounty Highway 0
CountyShasta County
StateCalifornia
Coordinates40.60892, -122.49931
Functional classRural Minor 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.
Superstructure7 GoodSome minor problems.
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 inspectionAugust 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
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 adequacy7: Better than present minimum criteria
Approach roadway alignment4: Meets minimum tolerable limits to be left in place as is
Operating rating33.2 US tons
Inventory rating20 US tons

Structure

Structure typeSlab
MaterialConcrete
DeckConcrete, cast-in-place
Main spans1
Design loadUnknown
Structure length27 ft (8.2 m)
Longest span26 ft (7.9 m)
Deck width25 ft (7.5 m)
Roadway width24 ft (7.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,144 (2012)
Projected traffic3,071 by 2044
Trucks5%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
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 Rock CR RD over Rock Creek built?

It was built in 1960, making it 65 years old in 2025.

What condition is Rock CR RD over Rock 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 August 2024.

How much traffic does Rock CR RD over Rock Creek carry?

About 1,144 vehicles per day (2012 count), of which roughly 5% are trucks.

How long is Rock CR RD over Rock Creek?

The structure is 27 ft (8.2 m) long with a longest span of 26 ft (7.9 m) and a deck 25 ft wide.

Who owns Rock CR RD over Rock Creek?

It is owned by the County Highway Agency.