US Bridges

East Fork Road over North Fork Trinity River

Good

Trinity County, California · 1.1 MI North S.R. 299 · Structure no. 05C0108

Built
1967
58 years old
Condition
Good
inspected May 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
181 ft
3 main spans
Daily traffic
200
1979 count
Owner
County
County Highway Agency

About this bridge

East Fork Road over North Fork Trinity River is a steel stringer/multi-beam or girder carrying East Fork Road over North Fork Trinity River in Trinity County, California. It was built in 1967, so it is 58 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 200 vehicles a day, roughly 5% of them trucks, projected to reach 266 by 2042. The structure is 181 ft (55.2 m) long and 29 ft wide. If it were closed, the detour would be 123.7 mi (199 km).

CarriesEast Fork Road
CrossesNorth Fork Trinity River
Location1.1 MI North S.R. 299
RouteCounty Highway 0
Coordinates40.78326, -123.1302
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 protection8 Very GoodNo problems noted.
Last inspectionMay 2024
Inspection intervalevery 24 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 adequacy9: Superior to present desirable criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating63.9 US tons
Inventory rating38.3 US tons

Structure

MaterialSteel
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length181 ft (55.2 m)
Longest span90 ft (27.4 m)
Deck width29 ft (8.7 m)
Roadway width27 ft (8.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic200 (1979)
Projected traffic266 by 2042
Trucks5%
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

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 East Fork Road over North Fork Trinity River built?

It was built in 1967, making it 58 years old in 2025.

What condition is East Fork Road over North Fork Trinity River 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 East Fork Road over North Fork Trinity River carry?

About 200 vehicles per day (1979 count), of which roughly 5% are trucks.

How long is East Fork Road over North Fork Trinity River?

The structure is 181 ft (55.2 m) long with a longest span of 90 ft (27.4 m) and a deck 29 ft wide.

Who owns East Fork Road over North Fork Trinity River?

It is owned by the County Highway Agency.