US Bridges

East Side Road over East Fork Trinity River

Fair

Trinity County, California · 7.8 MI Southeast of SR 3 · Structure no. 05C0174

Built
1960
65 years old
Condition
Fair
inspected May 2024
Type
Truss - Thru
Steel
Length
139 ft
1 main span
Daily traffic
420
2000 count
Owner
County
County Highway Agency

About this bridge

East Side Road over East Fork Trinity River is a steel truss - thru carrying East Side Road over East Fork Trinity River in Trinity County, California. It was built in 1960, so it is 65 years old, older 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 6 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 420 vehicles a day, roughly 10% of them trucks, projected to reach 533 by 2042. The structure is 139 ft (42.4 m) long and 31 ft wide. If it were closed, the detour would be 75.2 mi (121 km).

Location

Open in Google Maps
CarriesEast Side Road
CrossesEast Fork Trinity River
Location7.8 MI Southeast of SR 3
RouteCounty Highway 0
CountyTrinity County
StateCalifornia
Coordinates41.00963, -122.61994
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.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure7 GoodSome minor problems.
Channel and channel protection7 GoodSome minor problems.
Last inspectionMay 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation6: Equal to 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 rating58.2 US tons
Inventory rating35.1 US tons

Structure

Structure typeTruss - Thru
MaterialSteel
DeckConcrete, cast-in-place
Main spans1
Design loadUnknown
Structure length139 ft (42.4 m)
Longest span135 ft (41.1 m)
Deck width31 ft (9.4 m)
Roadway width26 ft (7.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic420 (2000)
Projected traffic533 by 2042
Trucks10%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed75.2 mi (121 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 Side Road over East Fork Trinity River built?

It was built in 1960, making it 65 years old in 2025.

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

About 420 vehicles per day (2000 count), of which roughly 10% are trucks.

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

The structure is 139 ft (42.4 m) long with a longest span of 135 ft (41.1 m) and a deck 31 ft wide.

Who owns East Side Road over East Fork Trinity River?

It is owned by the County Highway Agency.