US Bridges

State Route 89 over Hat Creek

Good

Shasta County, California · 02-SHA-089-14.37 · Structure no. 06 0086

Built
1934
91 years old
Condition
Good
inspected May 2024
Type
Slab
Concrete Continuous
Length
59 ft
3 main spans
Daily traffic
1,625
2009 count
Owner
State
State Highway Agency

About this bridge

State Route 89 over Hat Creek is a concrete continuous slab carrying State Route 89 over Hat Creek in Shasta County, California. It was built in 1934, so it is 91 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 1,625 vehicles a day, roughly 22% of them trucks, projected to reach 2,457 by 2041. The structure is 59 ft (18 m) long and 27 ft wide. If it were closed, the detour would be 123.7 mi (199 km).

CarriesState Route 89
CrossesHat Creek
Location02-SHA-089-14.37
RouteState Highway 89
Coordinates40.84923, -121.53076
Functional classRural Principal Arterial - Other

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 protection9 ExcellentNo problems noted.
Last inspectionMay 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourUnknown foundation; not evaluated for scour
Structural evaluation7: Better than present minimum criteria
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating68.2 US tons
Inventory rating41.1 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadH 15
Structure length59 ft (18 m)
Longest span19 ft (5.9 m)
Deck width27 ft (8.2 m)
Roadway width26 ft (8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,625 (2009)
Projected traffic2,457 by 2041
Trucks22%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed123.7 mi (199 km)
TollOn a free road
National Highway SystemYes

Ownership and planned work

OwnerState Highway Agency
Maintained byState 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 State Route 89 over Hat Creek built?

It was built in 1934, making it 91 years old in 2025.

What condition is State Route 89 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 2024.

How much traffic does State Route 89 over Hat Creek carry?

About 1,625 vehicles per day (2009 count), of which roughly 22% are trucks.

How long is State Route 89 over Hat Creek?

The structure is 59 ft (18 m) long with a longest span of 19 ft (5.9 m) and a deck 27 ft wide.

Who owns State Route 89 over Hat Creek?

It is owned by the State Highway Agency.