US Bridges

East Fork Hyfk RD over East Fork Hayfork Creek

Fair

Trinity County, California · 3.7 MI E of Wildwood Road · Structure no. 05C0231

Built
2004
21 years old
Condition
Fair
inspected May 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
31 ft
1 main span
Daily traffic
50
1980 count
Owner
County
County Highway Agency

About this bridge

East Fork Hyfk RD over East Fork Hayfork Creek is a steel stringer/multi-beam or girder carrying East Fork Hyfk RD over East Fork Hayfork Creek in Trinity County, California. It was built in 2004, so it is 21 years old, younger 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 5 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 50 vehicles a day, projected to reach 107 by 2042. The structure is 31 ft (9.5 m) long and 23 ft wide. If it were closed, the detour would be 123.7 mi (199 km).

Location

Open in Google Maps
CarriesEast Fork Hyfk RD
CrossesEast Fork Hayfork Creek
Location3.7 MI E of Wildwood Road
RouteCounty Highway 0
CountyTrinity County
StateCalifornia
Coordinates40.50168, -123.01612
Functional classRural Major Collector

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection7 GoodSome minor problems.
Last inspectionMay 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 rating110 US tons
Inventory rating77.8 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckCorrugated steel
Main spans1
Design loadHS 20
Structure length31 ft (9.5 m)
Longest span30 ft (9 m)
Deck width23 ft (7 m)
Roadway width22 ft (6.7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic50 (1980)
Projected traffic107 by 2042
Trucks—
Lanes on structure1
Traffic directionOne-lane bridge for two-way traffic
CarriesHighway
CrossesWaterway
Detour if closed123.7 mi (199 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—
NavigationNot applicable (no waterway)

Frequently asked questions

When was East Fork Hyfk RD over East Fork Hayfork Creek built?

It was built in 2004, making it 21 years old in 2025.

What condition is East Fork Hyfk RD over East Fork Hayfork 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 May 2024.

How much traffic does East Fork Hyfk RD over East Fork Hayfork Creek carry?

About 50 vehicles per day (1980 count).

How long is East Fork Hyfk RD over East Fork Hayfork Creek?

The structure is 31 ft (9.5 m) long with a longest span of 30 ft (9 m) and a deck 23 ft wide.

Who owns East Fork Hyfk RD over East Fork Hayfork Creek?

It is owned by the County Highway Agency.