US Bridges

Cassel Road over Hat Creek

Good

Shasta County, California · 3.4 MI NE of SR 89 · Structure no. 06C0207

Built
1930
95 years old, rebuilt 1980
Condition
Good
inspected May 2023
Type
Slab
Concrete Continuous
Length
97 ft
5 main spans
Daily traffic
230
2014 count
Owner
County
County Highway Agency

About this bridge

Cassel Road over Hat Creek is a concrete continuous slab carrying Cassel Road over Hat Creek in Shasta County, California. It was built in 1930 and reconstructed in 1980, 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 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 230 vehicles a day, roughly 5% of them trucks, projected to reach 642 by 2041. The structure is 97 ft (29.6 m) long and 25 ft wide. If it were closed, the detour would be 13 mi (21 km).

CarriesCassel Road
CrossesHat Creek
Location3.4 MI NE of SR 89
RouteCounty Highway 0
Coordinates40.91924, -121.55198
Functional classRural Local

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 inspectionMay 2023
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation7: Better than present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating81.5 US tons
Inventory rating48.9 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans5
Design loadHS 20 + Mod
Structure length97 ft (29.6 m)
Longest span19 ft (5.8 m)
Deck width25 ft (7.5 m)
Roadway width24 ft (7.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic230 (2014)
Projected traffic642 by 2041
Trucks5%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed13 mi (21 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 Cassel Road over Hat Creek built?

It was built in 1930, making it 95 years old in 2025. It was reconstructed in 1980.

What condition is Cassel Road over Hat Creek 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 May 2023.

How much traffic does Cassel Road over Hat Creek carry?

About 230 vehicles per day (2014 count), of which roughly 5% are trucks.

How long is Cassel Road over Hat Creek?

The structure is 97 ft (29.6 m) long with a longest span of 19 ft (5.8 m) and a deck 25 ft wide.

Who owns Cassel Road over Hat Creek?

It is owned by the County Highway Agency.