US Bridges

State Route 3 over Sunflower Creek

Good

Trinity County, California · 02-TRI-003-77.93 · Structure no. 05 0027

Built
1971
54 years old
Condition
Good
inspected August 2024
Type
Slab
Concrete
Length
28 ft
1 main span
Daily traffic
200
2009 count
Owner
State
State Highway Agency

About this bridge

State Route 3 over Sunflower Creek is a concrete slab carrying State Route 3 over Sunflower Creek in Trinity County, California. It was built in 1971, so it is 54 years old, younger 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 200 vehicles a day, roughly 35% of them trucks, projected to reach 317 by 2046. The structure is 28 ft (8.5 m) long and 34 ft wide. If it were closed, the detour would be 123.7 mi (199 km).

CarriesState Route 3
CrossesSunflower Creek
Location02-TRI-003-77.93
RouteState Highway 3
Coordinates41.21229, -122.64579
Functional classRural Minor Arterial

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 protection7 GoodSome minor problems.
Last inspectionAugust 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Deck geometry7: Better than present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating68.6 US tons
Inventory rating52.9 US tons

Structure

Structure typeSlab
MaterialConcrete
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20 + Mod
Structure length28 ft (8.5 m)
Longest span25 ft (7.5 m)
Deck width34 ft (10.4 m)
Roadway width32 ft (9.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic200 (2009)
Projected traffic317 by 2046
Trucks35%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed123.7 mi (199 km)
TollOn a free road
National Highway SystemNo

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 3 over Sunflower Creek built?

It was built in 1971, making it 54 years old in 2025.

What condition is State Route 3 over Sunflower 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 August 2024.

How much traffic does State Route 3 over Sunflower Creek carry?

About 200 vehicles per day (2009 count), of which roughly 35% are trucks.

How long is State Route 3 over Sunflower Creek?

The structure is 28 ft (8.5 m) long with a longest span of 25 ft (7.5 m) and a deck 34 ft wide.

Who owns State Route 3 over Sunflower Creek?

It is owned by the State Highway Agency.