US Bridges

Hamilton Cana HWY over Rock Creek Overflow Chnl

Good

Butte County, California · 3.04 MI N of SH 32 · Structure no. 12C0096

Built
1966
59 years old
Condition
Good
inspected July 2022
Type
Stringer/Multi-beam or Girder
Concrete
Length
62 ft
2 main spans
Daily traffic
694
2020 count
Owner
County
County Highway Agency

About this bridge

Hamilton Cana HWY over Rock Creek Overflow Chnl is a concrete stringer/multi-beam or girder carrying Hamilton Cana HWY over Rock Creek Overflow Chnl in Butte County, California. It was built in 1966, so it is 59 years old, older than the California average of 54.8 years.

The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 694 vehicles a day, roughly 11% of them trucks, projected to reach 852 by 2041. The structure is 62 ft (18.9 m) long and 29 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

CarriesHamilton Cana HWY
CrossesRock Creek Overflow Chnl
Location3.04 MI N of SH 32
RouteCounty Highway 0
Coordinates39.79518, -121.95676
Functional classRural Minor Collector

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionJuly 2022
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
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 rating81 US tons
Inventory rating48.9 US tons

Structure

MaterialConcrete
DeckConcrete, cast-in-place
Main spans2
Design loadHS 20
Structure length62 ft (18.9 m)
Longest span30 ft (9.1 m)
Deck width29 ft (8.9 m)
Roadway width29 ft (8.7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic694 (2020)
Projected traffic852 by 2041
Trucks11%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.7 mi (6 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 Hamilton Cana HWY over Rock Creek Overflow Chnl built?

It was built in 1966, making it 59 years old in 2025.

What condition is Hamilton Cana HWY over Rock Creek Overflow Chnl in?

The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in July 2022.

How much traffic does Hamilton Cana HWY over Rock Creek Overflow Chnl carry?

About 694 vehicles per day (2020 count), of which roughly 11% are trucks.

How long is Hamilton Cana HWY over Rock Creek Overflow Chnl?

The structure is 62 ft (18.9 m) long with a longest span of 30 ft (9.1 m) and a deck 29 ft wide.

Who owns Hamilton Cana HWY over Rock Creek Overflow Chnl?

It is owned by the County Highway Agency.