US Bridges

Fdr 85 over Rattlesnake Creek

Good

Nevada County, California · S23 T17N R13E · Structure no. 051755000001019

Built
1964
61 years old
Condition
Good
inspected September 2024
Type
Tee Beam
Concrete Continuous
Length
95 ft
3 main spans
Daily traffic
50
Owner
Federal
U.S. Forest Service

About this bridge

Fdr 85 over Rattlesnake Creek is a concrete continuous tee beam carrying Fdr 85 over Rattlesnake Creek in Nevada County, California. It was built in 1964, so it is 61 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 95 ft (29 m) long and 14 ft wide.

CarriesFdr 85
CrossesRattlesnake Creek
LocationS23 T17N R13E
RouteFederal Lands Road 85
Coordinates39.31658, -120.54736
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 inspectionSeptember 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 geometry6: Equal to present minimum criteria
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating53.2 US tons
Inventory rating41.1 US tons

Structure

Structure typeTee Beam
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadH 20
Structure length95 ft (29 m)
Longest span60 ft (18.3 m)
Deck width14 ft (4.3 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 Fdr 85 over Rattlesnake Creek built?

It was built in 1964, making it 61 years old in 2025.

What condition is Fdr 85 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 September 2024.

How much traffic does Fdr 85 over Rattlesnake Creek carry?

About 50 vehicles per day (latest count).

How long is Fdr 85 over Rattlesnake Creek?

The structure is 95 ft (29 m) long with a longest span of 60 ft (18.3 m) and a deck 14 ft wide.

Who owns Fdr 85 over Rattlesnake Creek?

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