US Bridges

Rattlesnake Ridge over Rattlesnake Creek

Good

Trinity County, California · Hells Gate Campground · Structure no. 051452000001009

Built
1965
60 years old
Condition
Good
inspected March 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
104 ft
1 main span
Daily traffic
50
Owner
Federal
U.S. Forest Service

About this bridge

Rattlesnake Ridge over Rattlesnake Creek is a steel stringer/multi-beam or girder carrying Rattlesnake Ridge over Rattlesnake Creek in Trinity County, California. It was built in 1965, so it is 60 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 50 vehicles a day, projected to reach 75 by 2045. The structure is 104 ft (31.8 m) long and 16 ft wide.

CarriesRattlesnake Ridge
CrossesRattlesnake Creek
LocationHells Gate Campground
RouteFederal Lands Road 29N58
Coordinates40.37013, -123.31298
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 protection7 GoodSome minor problems.
Last inspectionMarch 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 geometry6: Equal to present minimum criteria
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating37.1 US tons
Inventory rating28.5 US tons

Structure

MaterialSteel
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20
Structure length104 ft (31.8 m)
Longest span100 ft (30.5 m)
Deck width16 ft (5 m)
Roadway width14 ft (4.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic50 (—)
Projected traffic75 by 2045
Trucks—
Lanes on structure1
Traffic directionOne-lane bridge for two-way traffic
CarriesHighway
CrossesWaterway
Detour if closed—
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerU.S. Forest Service
Maintained byU.S. Forest Service
Historic statusHistorical significance not determinable at this time
Work proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was Rattlesnake Ridge over Rattlesnake Creek built?

It was built in 1965, making it 60 years old in 2025.

What condition is Rattlesnake Ridge over Rattlesnake 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 March 2024.

How much traffic does Rattlesnake Ridge over Rattlesnake Creek carry?

About 50 vehicles per day (latest count).

How long is Rattlesnake Ridge over Rattlesnake Creek?

The structure is 104 ft (31.8 m) long with a longest span of 100 ft (30.5 m) and a deck 16 ft wide.

Who owns Rattlesnake Ridge over Rattlesnake Creek?

It is owned by the U.S. Forest Service.