US Bridges

State Route 36 over Rattlesnake Creek

Good

Trinity County, California · 02-TRI-036-19.11 · Structure no. 05 0075

Built
1975
50 years old
Condition
Good
inspected March 2023
Type
Tee Beam
Concrete Continuous
Length
177 ft
3 main spans
Daily traffic
560
2009 count
Owner
State
State Highway Agency

About this bridge

State Route 36 over Rattlesnake Creek is a concrete continuous tee beam carrying State Route 36 over Rattlesnake Creek in Trinity County, California. It was built in 1975, so it is 50 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 560 vehicles a day, projected to reach 409 by 2040. The structure is 177 ft (54 m) long and 33 ft wide. If it were closed, the detour would be 123.7 mi (199 km).

Location

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CarriesState Route 36
CrossesRattlesnake Creek
Location02-TRI-036-19.11
RouteState Highway 36
CountyTrinity County
StateCalifornia
Coordinates40.38341, -123.29747
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 protection8 Very GoodNo problems noted.
Last inspectionMarch 2023
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 adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating34.6 US tons
Inventory rating26.8 US tons

Structure

Structure typeTee Beam
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length177 ft (54 m)
Longest span71 ft (21.6 m)
Deck width33 ft (10.2 m)
Roadway width33 ft (10 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic560 (2009)
Projected traffic409 by 2040
Trucks0%
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 36 over Rattlesnake Creek built?

It was built in 1975, making it 50 years old in 2025.

What condition is State Route 36 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 2023.

How much traffic does State Route 36 over Rattlesnake Creek carry?

About 560 vehicles per day (2009 count).

How long is State Route 36 over Rattlesnake Creek?

The structure is 177 ft (54 m) long with a longest span of 71 ft (21.6 m) and a deck 33 ft wide.

Who owns State Route 36 over Rattlesnake Creek?

It is owned by the State Highway Agency.