US Bridges

Anita RD over Rock Creek

Fair

Butte County, California · 0.9 MI W/O ST HWY 99 · Structure no. 12C0304

Built
1937
88 years old
Condition
Fair
inspected July 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
72 ft
1 main span
Daily traffic
463
2020 count
Owner
County
County Highway Agency

About this bridge

Anita RD over Rock Creek is a steel stringer/multi-beam or girder carrying Anita RD over Rock Creek in Butte County, California. It was built in 1937, so it is 88 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 463 vehicles a day, roughly 15% of them trucks, projected to reach 373 by 2041. The structure is 72 ft (22 m) long and 30 ft wide. If it were closed, the detour would be 6.8 mi (11 km).

Location

Open in Google Maps
CarriesAnita RD
CrossesRock Creek
Location0.9 MI W/O ST HWY 99
RouteCounty Highway 0
CountyButte County
StateCalifornia
Coordinates39.81128, -121.93485
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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection7 GoodSome minor problems.
Last inspectionJuly 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 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 rating31.7 US tons
Inventory rating19.3 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans1 (+2 approach)
Design loadUnknown
Structure length72 ft (22 m)
Longest span38 ft (11.6 m)
Deck width30 ft (9.1 m)
Roadway width26 ft (7.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic463 (2020)
Projected traffic373 by 2041
Trucks15%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed6.8 mi (11 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 Anita RD over Rock Creek built?

It was built in 1937, making it 88 years old in 2025.

What condition is Anita 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 July 2024.

How much traffic does Anita RD over Rock Creek carry?

About 463 vehicles per day (2020 count), of which roughly 15% are trucks.

How long is Anita RD over Rock Creek?

The structure is 72 ft (22 m) long with a longest span of 38 ft (11.6 m) and a deck 30 ft wide.

Who owns Anita RD over Rock Creek?

It is owned by the County Highway Agency.